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Merge pull request #3888 from MrPetovan/issue/#3878-hotfix

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Issue #3878 hotfix
This commit is contained in:
Michael Vogel 2017-11-09 09:11:56 +01:00 committed by GitHub
commit 67e32ce859
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73 changed files with 6301 additions and 963 deletions
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1
composer.json
View file

@ -16,6 +16,7 @@
"ezyang/htmlpurifier": "~4.7.0",
"mobiledetect/mobiledetectlib": "2.8.*",
"league/html-to-markdown": "~4.4.1",
"defuse/php-encryption": "2.*",
"pear/Text_LanguageDetect": "1.*",
"pear-pear.php.net/Text_Highlighter": "*"
},

113
composer.lock generated
View file

@ -4,8 +4,71 @@
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
"This file is @generated automatically"
],
"content-hash": "a87f82da9a0256ca85c839e83a5c26f0",
"content-hash": "ce088458d9f01920ccee128082ef924a",
"packages": [
{
"name": "defuse/php-encryption",
"version": "v2.1.0",
"source": {
"type": "git",
"url": "https://github.com/defuse/php-encryption.git",
"reference": "5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/defuse/php-encryption/zipball/5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689",
"reference": "5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689",
"shasum": ""
},
"require": {
"ext-openssl": "*",
"paragonie/random_compat": "~2.0",
"php": ">=5.4.0"
},
"require-dev": {
"nikic/php-parser": "^2.0|^3.0",
"phpunit/phpunit": "^4|^5"
},
"bin": [
"bin/generate-defuse-key"
],
"type": "library",
"autoload": {
"psr-4": {
"Defuse\\Crypto\\": "src"
}
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Taylor Hornby",
"email": "taylor@defuse.ca",
"homepage": "https://defuse.ca/"
},
{
"name": "Scott Arciszewski",
"email": "info@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"description": "Secure PHP Encryption Library",
"keywords": [
"aes",
"authenticated encryption",
"cipher",
"crypto",
"cryptography",
"encrypt",
"encryption",
"openssl",
"security",
"symmetric key cryptography"
],
"time": "2017-05-18T21:28:48+00:00"
},
{
"name": "ezyang/htmlpurifier",
"version": "v4.7.0",
@ -166,6 +229,54 @@
],
"time": "2017-08-29T18:23:54+00:00"
},
{
"name": "paragonie/random_compat",
"version": "v2.0.11",
"source": {
"type": "git",
"url": "https://github.com/paragonie/random_compat.git",
"reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/paragonie/random_compat/zipball/5da4d3c796c275c55f057af5a643ae297d96b4d8",
"reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8",
"shasum": ""
},
"require": {
"php": ">=5.2.0"
},
"require-dev": {
"phpunit/phpunit": "4.*|5.*"
},
"suggest": {
"ext-libsodium": "Provides a modern crypto API that can be used to generate random bytes."
},
"type": "library",
"autoload": {
"files": [
"lib/random.php"
]
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Paragon Initiative Enterprises",
"email": "security@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"description": "PHP 5.x polyfill for random_bytes() and random_int() from PHP 7",
"keywords": [
"csprng",
"pseudorandom",
"random"
],
"time": "2017-09-27T21:40:39+00:00"
},
{
"name": "pear-pear.php.net/Archive_Tar",
"version": "1.4.3",

3
include/items.php
View file

@ -33,9 +33,6 @@ require_once 'mod/share.php';
require_once 'include/enotify.php';
require_once 'include/group.php';
/// @TODO one day with composer autoloader no more needed
require_once 'library/defuse/php-encryption-1.2.1/Crypto.php';
function construct_verb($item) {
if ($item['verb']) {
return $item['verb'];

22
library/defuse/php-encryption-1.2.1/.travis.yml
View file

@ -1,22 +0,0 @@
language: php
php:
- "5.6"
- "5.5"
- "5.4"
- "5.3"
- "5.2"
# Versions below here are not installed on travis-ci
# - "5.1"
# - "5.0"
# - "4.4"
# - "4.3"
# - "4.2"
# - "4.1"
# - "4.0"
matrix:
allow_failures:
- php: "5.3"
- php: "5.2"
script: ./test.sh

677
library/defuse/php-encryption-1.2.1/Crypto.php
View file

@ -1,677 +0,0 @@
<?php
/*
* PHP Encryption Library
* Copyright (c) 2014, Taylor Hornby
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Web: https://defuse.ca/secure-php-encryption.htm
* GitHub: https://github.com/defuse/php-encryption
*
* WARNING: This encryption library is not a silver bullet. It only provides
* symmetric encryption given a uniformly random key. This means you MUST NOT
* use an ASCII string like a password as the key parameter, it MUST be
* a uniformly random key generated by CreateNewRandomKey(). If you want to
* encrypt something with a password, apply a password key derivation function
* like PBKDF2 or scrypt with a random salt to generate a key.
*
* WARNING: Error handling is very important, especially for crypto code!
*
* How to use this code:
*
* Generating a Key
* ----------------
* try {
* $key = self::CreateNewRandomKey();
* // WARNING: Do NOT encode $key with bin2hex() or base64_encode(),
* // they may leak the key to the attacker through side channels.
* } catch (CryptoTestFailedException $ex) {
* die('Cannot safely create a key');
* } catch (CannotPerformOperationException $ex) {
* die('Cannot safely create a key');
* }
*
* Encrypting a Message
* --------------------
* $message = "ATTACK AT DAWN";
* try {
* $ciphertext = self::Encrypt($message, $key);
* } catch (CryptoTestFailedException $ex) {
* die('Cannot safely perform encryption');
* } catch (CannotPerformOperationException $ex) {
* die('Cannot safely perform decryption');
* }
*
* Decrypting a Message
* --------------------
* try {
* $decrypted = self::Decrypt($ciphertext, $key);
* } catch (InvalidCiphertextException $ex) { // VERY IMPORTANT
* // Either:
* // 1. The ciphertext was modified by the attacker,
* // 2. The key is wrong, or
* // 3. $ciphertext is not a valid ciphertext or was corrupted.
* // Assume the worst.
* die('DANGER! DANGER! The ciphertext has been tampered with!');
* } catch (CryptoTestFailedException $ex) {
* die('Cannot safely perform encryption');
* } catch (CannotPerformOperationException $ex) {
* die('Cannot safely perform decryption');
* }
*/
/*
* Raised by Decrypt() when one of the following conditions are met:
* - The key is wrong.
* - The ciphertext is invalid or not in the correct format.
* - The attacker modified the ciphertext.
*/
class InvalidCiphertextException extends Exception {}
/* If you see these, it means it is NOT SAFE to do encryption on your system. */
class CannotPerformOperationException extends Exception {}
class CryptoTestFailedException extends Exception {}
final class Crypto
{
// Ciphertext format: [____HMAC____][____IV____][____CIPHERTEXT____].
/* DO NOT CHANGE THESE CONSTANTS!
*
* We spent *weeks* testing this code, making sure it is as perfect and
* correct as possible. Are you going to do the same after making your
* changes? Probably not. Besides, any change to these constants will break
* the runtime tests, which are extremely important for your security.
* You're literally millions of times more likely to screw up your own
* security by changing something here than you are to fall victim to an
* 128-bit key brute-force attack. You're also breaking your own
* compatibility with future updates to this library, so you'll be left
* vulnerable if we ever find a security bug and release a fix.
*
* So, PLEASE, do not change these constants.
*/
const CIPHER = 'aes-128';
const KEY_BYTE_SIZE = 16;
const CIPHER_MODE = 'cbc';
const HASH_FUNCTION = 'sha256';
const MAC_BYTE_SIZE = 32;
const ENCRYPTION_INFO = 'DefusePHP|KeyForEncryption';
const AUTHENTICATION_INFO = 'DefusePHP|KeyForAuthentication';
/*
* Use this to generate a random encryption key.
*/
public static function CreateNewRandomKey()
{
self::RuntimeTest();
return self::SecureRandom(self::KEY_BYTE_SIZE);
}
/*
* Encrypts a message.
* $plaintext is the message to encrypt.
* $key is the encryption key, a value generated by CreateNewRandomKey().
* You MUST catch exceptions thrown by this function. See docs above.
*/
public static function Encrypt($plaintext, $key)
{
self::RuntimeTest();
if (self::our_strlen($key) !== self::KEY_BYTE_SIZE)
{
throw new CannotPerformOperationException("Bad key.");
}
$method = self::CIPHER.'-'.self::CIPHER_MODE;
self::EnsureFunctionExists('openssl_get_cipher_methods');
if (in_array($method, openssl_get_cipher_methods()) === FALSE) {
throw new CannotPerformOperationException("Cipher method not supported.");
}
// Generate a sub-key for encryption.
$keysize = self::KEY_BYTE_SIZE;
$ekey = self::HKDF(self::HASH_FUNCTION, $key, $keysize, self::ENCRYPTION_INFO);
// Generate a random initialization vector.
self::EnsureFunctionExists("openssl_cipher_iv_length");
$ivsize = openssl_cipher_iv_length($method);
if ($ivsize === FALSE || $ivsize <= 0) {
throw new CannotPerformOperationException();
}
$iv = self::SecureRandom($ivsize);
$ciphertext = $iv . self::PlainEncrypt($plaintext, $ekey, $iv);
// Generate a sub-key for authentication and apply the HMAC.
$akey = self::HKDF(self::HASH_FUNCTION, $key, self::KEY_BYTE_SIZE, self::AUTHENTICATION_INFO);
$auth = hash_hmac(self::HASH_FUNCTION, $ciphertext, $akey, true);
$ciphertext = $auth . $ciphertext;
return $ciphertext;
}
/*
* Decrypts a ciphertext.
* $ciphertext is the ciphertext to decrypt.
* $key is the key that the ciphertext was encrypted with.
* You MUST catch exceptions thrown by this function. See docs above.
*/
public static function Decrypt($ciphertext, $key)
{
self::RuntimeTest();
$method = self::CIPHER.'-'.self::CIPHER_MODE;
self::EnsureFunctionExists('openssl_get_cipher_methods');
if (in_array($method, openssl_get_cipher_methods()) === FALSE) {
throw new CannotPerformOperationException("Cipher method not supported.");
}
// Extract the HMAC from the front of the ciphertext.
if (self::our_strlen($ciphertext) <= self::MAC_BYTE_SIZE) {
throw new InvalidCiphertextException();
}
$hmac = self::our_substr($ciphertext, 0, self::MAC_BYTE_SIZE);
if ($hmac === FALSE) {
throw new CannotPerformOperationException();
}
$ciphertext = self::our_substr($ciphertext, self::MAC_BYTE_SIZE);
if ($ciphertext === FALSE) {
throw new CannotPerformOperationException();
}
// Regenerate the same authentication sub-key.
$akey = self::HKDF(self::HASH_FUNCTION, $key, self::KEY_BYTE_SIZE, self::AUTHENTICATION_INFO);
if (self::VerifyHMAC($hmac, $ciphertext, $akey))
{
// Regenerate the same encryption sub-key.
$keysize = self::KEY_BYTE_SIZE;
$ekey = self::HKDF(self::HASH_FUNCTION, $key, $keysize, self::ENCRYPTION_INFO);
// Extract the initialization vector from the ciphertext.
self::EnsureFunctionExists("openssl_cipher_iv_length");
$ivsize = openssl_cipher_iv_length($method);
if ($ivsize === FALSE || $ivsize <= 0) {
throw new CannotPerformOperationException();
}
if (self::our_strlen($ciphertext) <= $ivsize) {
throw new InvalidCiphertextException();
}
$iv = self::our_substr($ciphertext, 0, $ivsize);
if ($iv === FALSE) {
throw new CannotPerformOperationException();
}
$ciphertext = self::our_substr($ciphertext, $ivsize);
if ($ciphertext === FALSE) {
throw new CannotPerformOperationException();
}
$plaintext = self::PlainDecrypt($ciphertext, $ekey, $iv);
return $plaintext;
}
else
{
/*
* We throw an exception instead of returning FALSE because we want
* a script that doesn't handle this condition to CRASH, instead
* of thinking the ciphertext decrypted to the value FALSE.
*/
throw new InvalidCiphertextException();
}
}
/*
* Runs tests.
* Raises CannotPerformOperationException or CryptoTestFailedException if
* one of the tests fail. If any tests fails, your system is not capable of
* performing encryption, so make sure you fail safe in that case.
*/
public static function RuntimeTest()
{
// 0: Tests haven't been run yet.
// 1: Tests have passed.
// 2: Tests are running right now.
// 3: Tests have failed.
static $test_state = 0;
if ($test_state === 1 || $test_state === 2) {
return;
}
try {
$test_state = 2;
self::AESTestVector();
self::HMACTestVector();
self::HKDFTestVector();
self::TestEncryptDecrypt();
if (self::our_strlen(self::CreateNewRandomKey()) != self::KEY_BYTE_SIZE) {
throw new CryptoTestFailedException();
}
if (self::ENCRYPTION_INFO == self::AUTHENTICATION_INFO) {
throw new CryptoTestFailedException();
}
} catch (CryptoTestFailedException $ex) {
// Do this, otherwise it will stay in the "tests are running" state.
$test_state = 3;
throw $ex;
}
// Change this to '0' make the tests always re-run (for benchmarking).
$test_state = 1;
}
/*
* Never call this method directly!
*/
private static function PlainEncrypt($plaintext, $key, $iv)
{
$method = self::CIPHER.'-'.self::CIPHER_MODE;
self::EnsureConstantExists("OPENSSL_RAW_DATA");
self::EnsureFunctionExists("openssl_encrypt");
$ciphertext = openssl_encrypt(
$plaintext,
$method,
$key,
OPENSSL_RAW_DATA,
$iv
);
if ($ciphertext === false) {
throw new CannotPerformOperationException();
}
return $ciphertext;
}
/*
* Never call this method directly!
*/
private static function PlainDecrypt($ciphertext, $key, $iv)
{
$method = self::CIPHER.'-'.self::CIPHER_MODE;
self::EnsureConstantExists("OPENSSL_RAW_DATA");
self::EnsureFunctionExists("openssl_encrypt");
$plaintext = openssl_decrypt(
$ciphertext,
$method,
$key,
OPENSSL_RAW_DATA,
$iv
);
if ($plaintext === FALSE) {
throw new CannotPerformOperationException();
}
return $plaintext;
}
/*
* Returns a random binary string of length $octets bytes.
*/
private static function SecureRandom($octets)
{
self::EnsureFunctionExists("openssl_random_pseudo_bytes");
$random = openssl_random_pseudo_bytes($octets, $crypto_strong);
if ($crypto_strong === FALSE) {
throw new CannotPerformOperationException();
} else {
return $random;
}
}
/*
* Use HKDF to derive multiple keys from one.
* http://tools.ietf.org/html/rfc5869
*/
private static function HKDF($hash, $ikm, $length, $info = '', $salt = NULL)
{
// Find the correct digest length as quickly as we can.
$digest_length = self::MAC_BYTE_SIZE;
if ($hash != self::HASH_FUNCTION) {
$digest_length = self::our_strlen(hash_hmac($hash, '', '', true));
}
// Sanity-check the desired output length.
if (empty($length) || !is_int($length) ||
$length < 0 || $length > 255 * $digest_length) {
throw new CannotPerformOperationException();
}
// "if [salt] not provided, is set to a string of HashLen zeroes."
if (is_null($salt)) {
$salt = str_repeat("\x00", $digest_length);
}
// HKDF-Extract:
// PRK = HMAC-Hash(salt, IKM)
// The salt is the HMAC key.
$prk = hash_hmac($hash, $ikm, $salt, true);
// HKDF-Expand:
// This check is useless, but it serves as a reminder to the spec.
if (self::our_strlen($prk) < $digest_length) {
throw new CannotPerformOperationException();
}
// T(0) = ''
$t = '';
$last_block = '';
for ($block_index = 1; self::our_strlen($t) < $length; $block_index++) {
// T(i) = HMAC-Hash(PRK, T(i-1) | info | 0x??)
$last_block = hash_hmac(
$hash,
$last_block . $info . chr($block_index),
$prk,
true
);
// T = T(1) | T(2) | T(3) | ... | T(N)
$t .= $last_block;
}
// ORM = first L octets of T
$orm = self::our_substr($t, 0, $length);
if ($orm === FALSE) {
throw new CannotPerformOperationException();
}
return $orm;
}
private static function VerifyHMAC($correct_hmac, $message, $key)
{
$message_hmac = hash_hmac(self::HASH_FUNCTION, $message, $key, true);
// We can't just compare the strings with '==', since it would make
// timing attacks possible. We could use the XOR-OR constant-time
// comparison algorithm, but I'm not sure if that's good enough way up
// here in an interpreted language. So we use the method of HMACing the
// strings we want to compare with a random key, then comparing those.
// NOTE: This leaks information when the strings are not the same
// length, but they should always be the same length here. Enforce it:
if (self::our_strlen($correct_hmac) !== self::our_strlen($message_hmac)) {
throw new CannotPerformOperationException();
}
$blind = self::CreateNewRandomKey();
$message_compare = hash_hmac(self::HASH_FUNCTION, $message_hmac, $blind);
$correct_compare = hash_hmac(self::HASH_FUNCTION, $correct_hmac, $blind);
return $correct_compare === $message_compare;
}
private static function TestEncryptDecrypt()
{
$key = self::CreateNewRandomKey();
$data = "EnCrYpT EvErYThInG\x00\x00";
// Make sure encrypting then decrypting doesn't change the message.
$ciphertext = self::Encrypt($data, $key);
try {
$decrypted = self::Decrypt($ciphertext, $key);
} catch (InvalidCiphertextException $ex) {
// It's important to catch this and change it into a
// CryptoTestFailedException, otherwise a test failure could trick
// the user into thinking it's just an invalid ciphertext!
throw new CryptoTestFailedException();
}
if($decrypted !== $data)
{
throw new CryptoTestFailedException();
}
// Modifying the ciphertext: Appending a string.
try {
self::Decrypt($ciphertext . "a", $key);
throw new CryptoTestFailedException();
} catch (InvalidCiphertextException $e) { /* expected */ }
// Modifying the ciphertext: Changing an IV byte.
try {
$ciphertext[0] = chr((ord($ciphertext[0]) + 1) % 256);
self::Decrypt($ciphertext, $key);
throw new CryptoTestFailedException();
} catch (InvalidCiphertextException $e) { /* expected */ }
// Decrypting with the wrong key.
$key = self::CreateNewRandomKey();
$data = "abcdef";
$ciphertext = self::Encrypt($data, $key);
$wrong_key = self::CreateNewRandomKey();
try {
self::Decrypt($ciphertext, $wrong_key);
throw new CryptoTestFailedException();
} catch (InvalidCiphertextException $e) { /* expected */ }
// Ciphertext too small (shorter than HMAC).
$key = self::CreateNewRandomKey();
$ciphertext = str_repeat("A", self::MAC_BYTE_SIZE - 1);
try {
self::Decrypt($ciphertext, $key);
throw new CryptoTestFailedException();
} catch (InvalidCiphertextException $e) { /* expected */ }
}
private static function HKDFTestVector()
{
// HKDF test vectors from RFC 5869
// Test Case 1
$ikm = str_repeat("\x0b", 22);
$salt = self::hexToBytes("000102030405060708090a0b0c");
$info = self::hexToBytes("f0f1f2f3f4f5f6f7f8f9");
$length = 42;
$okm = self::hexToBytes(
"3cb25f25faacd57a90434f64d0362f2a" .
"2d2d0a90cf1a5a4c5db02d56ecc4c5bf" .
"34007208d5b887185865"
);
$computed_okm = self::HKDF("sha256", $ikm, $length, $info, $salt);
if ($computed_okm !== $okm) {
throw new CryptoTestFailedException();
}
// Test Case 7
$ikm = str_repeat("\x0c", 22);
$length = 42;
$okm = self::hexToBytes(
"2c91117204d745f3500d636a62f64f0a" .
"b3bae548aa53d423b0d1f27ebba6f5e5" .
"673a081d70cce7acfc48"
);
$computed_okm = self::HKDF("sha1", $ikm, $length);
if ($computed_okm !== $okm) {
throw new CryptoTestFailedException();
}
}
private static function HMACTestVector()
{
// HMAC test vector From RFC 4231 (Test Case 1)
$key = str_repeat("\x0b", 20);
$data = "Hi There";
$correct = "b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7";
if (hash_hmac(self::HASH_FUNCTION, $data, $key) != $correct) {
throw new CryptoTestFailedException();
}
}
private static function AESTestVector()
{
// AES CBC mode test vector from NIST SP 800-38A
$key = self::hexToBytes("2b7e151628aed2a6abf7158809cf4f3c");
$iv = self::hexToBytes("000102030405060708090a0b0c0d0e0f");
$plaintext = self::hexToBytes(
"6bc1bee22e409f96e93d7e117393172a" .
"ae2d8a571e03ac9c9eb76fac45af8e51" .
"30c81c46a35ce411e5fbc1191a0a52ef" .
"f69f2445df4f9b17ad2b417be66c3710"
);
$ciphertext = self::hexToBytes(
"7649abac8119b246cee98e9b12e9197d" .
"5086cb9b507219ee95db113a917678b2" .
"73bed6b8e3c1743b7116e69e22229516" .
"3ff1caa1681fac09120eca307586e1a7" .
/* Block due to padding. Not from NIST test vector.
Padding Block: 10101010101010101010101010101010
Ciphertext: 3ff1caa1681fac09120eca307586e1a7
(+) 2fe1dab1780fbc19021eda206596f1b7
AES 8cb82807230e1321d3fae00d18cc2012
*/
"8cb82807230e1321d3fae00d18cc2012"
);
$computed_ciphertext = self::PlainEncrypt($plaintext, $key, $iv);
if ($computed_ciphertext !== $ciphertext) {
throw new CryptoTestFailedException();
}
$computed_plaintext = self::PlainDecrypt($ciphertext, $key, $iv);
if ($computed_plaintext !== $plaintext) {
throw new CryptoTestFailedException();
}
}
/* WARNING: Do not call this function on secrets. It creates side channels. */
private static function hexToBytes($hex_string)
{
return pack("H*", $hex_string);
}
private static function EnsureConstantExists($name)
{
if (!defined($name)) {
throw new CannotPerformOperationException();
}
}
private static function EnsureFunctionExists($name)
{
if (!function_exists($name)) {
throw new CannotPerformOperationException();
}
}
/*
* We need these strlen() and substr() functions because when
* 'mbstring.func_overload' is set in php.ini, the standard strlen() and
* substr() are replaced by mb_strlen() and mb_substr().
*/
private static function our_strlen($str)
{
if (function_exists('mb_strlen')) {
$length = mb_strlen($str, '8bit');
if ($length === FALSE) {
throw new CannotPerformOperationException();
}
return $length;
} else {
return strlen($str);
}
}
private static function our_substr($str, $start, $length = NULL)
{
if (function_exists('mb_substr'))
{
// mb_substr($str, 0, NULL, '8bit') returns an empty string on PHP
// 5.3, so we have to find the length ourselves.
if (!isset($length)) {
if ($start >= 0) {
$length = self::our_strlen($str) - $start;
} else {
$length = -$start;
}
}
return mb_substr($str, $start, $length, '8bit');
}
// Unlike mb_substr(), substr() doesn't accept NULL for length
if (isset($length)) {
return substr($str, $start, $length);
} else {
return substr($str, $start);
}
}
}
/*
* We want to catch all uncaught exceptions that come from the Crypto class,
* since by default, PHP will leak the key in the stack trace from an uncaught
* exception. This is a really ugly hack, but I think it's justified.
*
* Everything up to handler() getting called should be reliable, so this should
* reliably suppress the stack traces. The rest is just a bonus so that we don't
* make it impossible to debug other exceptions.
*
* This bit of code was adapted from: http://stackoverflow.com/a/7939492
*/
class CryptoExceptionHandler
{
private $rethrow = NULL;
public function __construct()
{
set_exception_handler(array($this, "handler"));
}
public function handler($ex)
{
if (
$ex instanceof InvalidCiphertextException ||
$ex instanceof CannotPerformOperationException ||
$ex instanceof CryptoTestFailedException
) {
echo "FATAL ERROR: Uncaught crypto exception. Suppresssing output.\n";
} else {
/* Re-throw the exception in the destructor. */
$this->rethrow = $ex;
}
}
public function __destruct() {
if ($this->rethrow) {
throw $this->rethrow;
}
}
}
$crypto_exception_handler_object_dont_touch_me = new CryptoExceptionHandler();

79
library/defuse/php-encryption-1.2.1/README.md
View file

@ -1,79 +0,0 @@
php-encryption
===============
This is a class for doing symmetric encryption in PHP. **Requires PHP 5.4 or newer.**
[![Build Status](https://travis-ci.org/defuse/php-encryption.svg?branch=master)](https://travis-ci.org/defuse/php-encryption)
Implementation
--------------
Messages are encrypted with AES-128 in CBC mode and are authenticated with
HMAC-SHA256 (Encrypt-then-Mac). PKCS7 padding is used to pad the message to
a multiple of the block size. HKDF is used to split the user-provided key into
two keys: one for encryption, and the other for authentication. It is
implemented using the `openssl_` and `hash_hmac` functions.
Warning
--------
This is new code, and it hasn't received much review by experts. I have spent
many hours making it as secure as possible (extensive runtime tests, secure
coding practices), and auditing it for problems, but I may have missed some
issues. So be careful. Don't trust it with your life. Check out the open GitHub
issues for a list of known issues. If you find a problem with this library,
please report it by opening a GitHub issue.
That said, you're probably much better off using this library than any other
encryption library written in PHP.
Philosophy
-----------
This library was created after noticing how much insecure PHP encryption code
there is. I once did a Google search for "php encryption" and found insecure
code or advice on 9 of the top 10 results.
Encryption is becoming an essential component of modern websites. This library
aims to fulfil a subset of that need: Authenticated symmetric encryption of
short strings, given a random key.
This library is developed around several core values:
- Rule #1: Security is prioritized over everything else.
> Whenever there is a conflict between security and some other property,
> security will be favored. For example, the library has runtime tests,
> which make it slower, but will hopefully stop it from encrypting stuff
> if the platform it's running on is broken.
- Rule #2: It should be difficult to misuse the library.
> We assume the developers using this library have no experience with
> cryptography. We only assume that they know that the "key" is something
> you need to encrypt and decrypt the messages, and that it must be
> protected. Whenever possible, the library should refuse to encrypt or
> decrypt messages when it is not being used correctly.
- Rule #3: The library aims only to be compatible with itself.
> Other PHP encryption libraries try to support every possible type of
> encryption, even the insecure ones (e.g. ECB mode). Because there are so
> many options, inexperienced developers must make decisions between
> things like "CBC" mode and "ECB" mode, knowing nothing about either one,
> which inevitably creates vulnerabilities.
> This library will only support one secure mode. A developer using this
> library will call "encrypt" and "decrypt" not caring about how they are
> implemented.
- Rule #4: The library should consist of a single PHP file and nothing more.
> Some PHP encryption libraries, like libsodium-php [1], are not
> straightforward to install and cannot packaged with "just download and
> extract" applications. This library will always be just one PHP file
> that you can put in your source tree and require().
References:
[1] https://github.com/jedisct1/libsodium-php

42
library/defuse/php-encryption-1.2.1/benchmark.php
View file

@ -1,42 +0,0 @@
<?php
require_once('Crypto.php');
// Note: By default, the runtime tests are "cached" and not re-executed for
// every call. To disable this, look at the RuntimeTest() function.
$start = microtime(true);
for ($i = 0; $i < 1000; $i++) {
$key = Crypto::CreateNewRandomKey();
}
$end = microtime(true);
showResults("CreateNewRandomKey()", $start, $end, 1000);
$start = microtime(true);
for ($i = 0; $i < 100; $i++) {
$ciphertext = Crypto::Encrypt(
str_repeat("A", 1024*1024),
str_repeat("B", 16)
);
}
$end = microtime(true);
showResults("Encrypt(1MB)", $start, $end, 100);
$start = microtime(true);
for ($i = 0; $i < 1000; $i++) {
$ciphertext = Crypto::Encrypt(
str_repeat("A", 1024),
str_repeat("B", 16)
);
}
$end = microtime(true);
showResults("Encrypt(1KB)", $start, $end, 1000);
function showResults($type, $start, $end, $count)
{
$time = $end - $start;
$rate = $count / $time;
echo "$type: $rate calls/s\n";
}
?>

20
library/defuse/php-encryption-1.2.1/composer.json
View file

@ -1,20 +0,0 @@
{
"name": "defuse/php-encryption",
"description": "Secure PHP Encryption Library",
"license": "MIT",
"keywords": ["security", "encryption", "AES", "mcrypt", "cipher"],
"authors": [
{
"name": "Taylor Hornby",
"email": "havoc@defuse.ca"
}
],
"autoload": {
"files": ["Crypto.php"]
},
"require": {
"php": ">=5.4.0",
"ext-openssl": "*",
"ext-mcrypt": "*"
}
}

36
library/defuse/php-encryption-1.2.1/example.php
View file

@ -1,36 +0,0 @@
<?php
require_once('Crypto.php');
try {
$key = Crypto::CreateNewRandomKey();
// WARNING: Do NOT encode $key with bin2hex() or base64_encode(),
// they may leak the key to the attacker through side channels.
} catch (CryptoTestFailedException $ex) {
die('Cannot safely create a key');
} catch (CannotPerformOperationException $ex) {
die('Cannot safely create a key');
}
$message = "ATTACK AT DAWN";
try {
$ciphertext = Crypto::Encrypt($message, $key);
} catch (CryptoTestFailedException $ex) {
die('Cannot safely perform encryption');
} catch (CannotPerformOperationException $ex) {
die('Cannot safely perform decryption');
}
try {
$decrypted = Crypto::Decrypt($ciphertext, $key);
} catch (InvalidCiphertextException $ex) { // VERY IMPORTANT
// Either:
// 1. The ciphertext was modified by the attacker,
// 2. The key is wrong, or
// 3. $ciphertext is not a valid ciphertext or was corrupted.
// Assume the worst.
die('DANGER! DANGER! The ciphertext has been tampered with!');
} catch (CryptoTestFailedException $ex) {
die('Cannot safely perform encryption');
} catch (CannotPerformOperationException $ex) {
die('Cannot safely perform decryption');
}
?>

30
library/defuse/php-encryption-1.2.1/test.sh
View file

@ -1,30 +0,0 @@
#!/bin/bash
echo "Normal"
echo "--------------------------------------------------"
php -d mbstring.func_overload=0 tests/runtime.php
if [ $? -ne 0 ]; then
echo "FAIL."
exit 1
fi
echo "--------------------------------------------------"
echo ""
echo "Multibyte"
echo "--------------------------------------------------"
php -d mbstring.func_overload=7 tests/runtime.php
if [ $? -ne 0 ]; then
echo "FAIL."
exit 1
fi
echo "--------------------------------------------------"
echo ""
if [ -z "$(php Crypto.php)" ]; then
echo "PASS: Crypto.php output is empty."
else
echo "FAIL: Crypto.php output is not empty."
exit 1
fi

32
library/defuse/php-encryption-1.2.1/tests/runtime.php
View file

@ -1,32 +0,0 @@
<?php
// Set the encoding to something more "challenging."
$ret = mb_internal_encoding('UTF-8');
if ($ret === FALSE) {
echo "Couldn't set encoding.";
exit(1);
}
// Dump out the settings / encoding for future reference.
$val = ini_get("mbstring.func_overload");
echo "Settings: \n";
echo " func_overload: " . $val . "\n";
echo " mb_internal_encoding(): " . mb_internal_encoding() . "\n";
// Perform the tests.
require_once('Crypto.php');
try {
Crypto::RuntimeTest();
echo "TEST PASSED!\n";
exit(0);
} catch (CryptoTestFailedException $ex) {
echo "TEST FAILED!\n";
var_dump($ex);
exit(1);
} catch (CannotPerformOperationException $ex) {
echo "TEST FAILED\n";
var_dump($ex);
exit(1);
}
?>

16
mod/dfrn_notify.php
View file

@ -11,10 +11,8 @@ use Friendica\Core\Config;
use Friendica\Database\DBM;
use Friendica\Protocol\DFRN;
require_once('include/items.php');
require_once('include/event.php');
require_once('library/defuse/php-encryption-1.2.1/Crypto.php');
require_once 'include/items.php';
require_once 'include/event.php';
function dfrn_notify_post(App $a) {
logger(__function__, LOGGER_TRACE);
@ -185,8 +183,9 @@ function dfrn_notify_post(App $a) {
break;
case 2:
try {
$data = Crypto::decrypt(hex2bin($data), $final_key);
} catch (InvalidCiphertext $ex) { // VERY IMPORTANT
$FinalKey = \Defuse\Crypto\Key::loadFromAsciiSafeString(bin2hex($final_key));
$data = \Defuse\Crypto\Crypto::decrypt(hex2bin($data), $FinalKey);
} catch (\Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException $ex) { // VERY IMPORTANT
/*
* Either:
* 1. The ciphertext was modified by the attacker,
@ -196,12 +195,9 @@ function dfrn_notify_post(App $a) {
*/
logger('The ciphertext has been tampered with!');
xml_status(0, 'The ciphertext has been tampered with!');
} catch (Ex\CryptoTestFailed $ex) {
} catch (\Defuse\Crypto\Exception\EnvironmentIsBrokenException $ex) {
logger('Cannot safely perform dencryption');
xml_status(0, 'CryptoTestFailed');
} catch (Ex\CannotPerformOperation $ex) {
logger('Cannot safely perform decryption');
xml_status(0, 'Cannot safely perform decryption');
}
break;
default:

17
src/Protocol/DFRN.php
View file

@ -1296,26 +1296,21 @@ class DFRN
case 2:
// RINO 2 based on php-encryption
try {
$key = Crypto::createNewRandomKey();
} catch (CryptoTestFailed $ex) {
$KeyObject = \Defuse\Crypto\Key::createNewRandomKey();
} catch (\Defuse\Crypto\Exception\CryptoException $ex) {
logger('Cannot safely create a key');
return -4;
} catch (CannotPerformOperation $ex) {
logger('Cannot safely create a key');
return -5;
}
try {
$data = Crypto::encrypt($postvars['data'], $key);
} catch (CryptoTestFailed $ex) {
$data = \Defuse\Crypto\Crypto::encrypt($postvars['data'], $KeyObject);
$key = $KeyObject->saveToAsciiSafeString();
} catch (\Defuse\Crypto\Exception\CryptoException $ex) {
logger('Cannot safely perform encryption');
return -6;
} catch (CannotPerformOperation $ex) {
logger('Cannot safely perform encryption');
return -7;
}
break;
default:
logger("rino: invalid requested verision '$rino_remote_version'");
logger("rino: invalid requested version '$rino_remote_version'");
return -8;
}

BIN
util/composer.phar
View file

Binary file not shown.

17
vendor/bin/generate-defuse-key vendored Normal file
View file

@ -0,0 +1,17 @@
#!/usr/bin/env sh
dir=$(d=${0%[/\\]*}; cd "$d"; cd "../defuse/php-encryption/bin" && pwd)
# See if we are running in Cygwin by checking for cygpath program
if command -v 'cygpath' >/dev/null 2>&1; then
# Cygwin paths start with /cygdrive/ which will break windows PHP,
# so we need to translate the dir path to windows format. However
# we could be using cygwin PHP which does not require this, so we
# test if the path to PHP starts with /cygdrive/ rather than /usr/bin
if [[ $(which php) == /cygdrive/* ]]; then
dir=$(cygpath -m "$dir");
fi
fi
dir=$(echo $dir | sed 's/ /\ /g')
"${dir}/generate-defuse-key" "$@"

4
vendor/bin/generate-defuse-key.bat vendored Normal file
View file

@ -0,0 +1,4 @@
@ECHO OFF
setlocal DISABLEDELAYEDEXPANSION
SET BIN_TARGET=%~dp0/../defuse/php-encryption/bin/generate-defuse-key
php "%BIN_TARGET%" %*

19
vendor/composer/autoload_classmap.php vendored
View file

@ -8,13 +8,32 @@ $baseDir = dirname($vendorDir);
return array(
'Archive_Tar' => $vendorDir . '/pear-pear.php.net/Archive_Tar/Archive/Tar.php',
'Console_Getopt' => $vendorDir . '/pear-pear.php.net/Console_Getopt/Console/Getopt.php',
'Defuse\\Crypto\\Core' => $vendorDir . '/defuse/php-encryption/src/Core.php',
'Defuse\\Crypto\\Crypto' => $vendorDir . '/defuse/php-encryption/src/Crypto.php',
'Defuse\\Crypto\\DerivedKeys' => $vendorDir . '/defuse/php-encryption/src/DerivedKeys.php',
'Defuse\\Crypto\\Encoding' => $vendorDir . '/defuse/php-encryption/src/Encoding.php',
'Defuse\\Crypto\\Exception\\BadFormatException' => $vendorDir . '/defuse/php-encryption/src/Exception/BadFormatException.php',
'Defuse\\Crypto\\Exception\\CryptoException' => $vendorDir . '/defuse/php-encryption/src/Exception/CryptoException.php',
'Defuse\\Crypto\\Exception\\EnvironmentIsBrokenException' => $vendorDir . '/defuse/php-encryption/src/Exception/EnvironmentIsBrokenException.php',
'Defuse\\Crypto\\Exception\\IOException' => $vendorDir . '/defuse/php-encryption/src/Exception/IOException.php',
'Defuse\\Crypto\\Exception\\WrongKeyOrModifiedCiphertextException' => $vendorDir . '/defuse/php-encryption/src/Exception/WrongKeyOrModifiedCiphertextException.php',
'Defuse\\Crypto\\File' => $vendorDir . '/defuse/php-encryption/src/File.php',
'Defuse\\Crypto\\Key' => $vendorDir . '/defuse/php-encryption/src/Key.php',
'Defuse\\Crypto\\KeyOrPassword' => $vendorDir . '/defuse/php-encryption/src/KeyOrPassword.php',
'Defuse\\Crypto\\KeyProtectedByPassword' => $vendorDir . '/defuse/php-encryption/src/KeyProtectedByPassword.php',
'Defuse\\Crypto\\RuntimeTests' => $vendorDir . '/defuse/php-encryption/src/RuntimeTests.php',
'Detection\\MobileDetect' => $vendorDir . '/mobiledetect/mobiledetectlib/namespaced/Detection/MobileDetect.php',
'Friendica\\App' => $baseDir . '/src/App.php',
'Friendica\\Core\\Config' => $baseDir . '/src/Core/Config.php',
'Friendica\\Core\\NotificationsManager' => $baseDir . '/src/Core/NotificationsManager.php',
'Friendica\\Core\\PConfig' => $baseDir . '/src/Core/PConfig.php',
'Friendica\\Core\\System' => $baseDir . '/src/Core/System.php',
'Friendica\\Core\\Worker' => $baseDir . '/src/Core/Worker.php',
'Friendica\\Database\\DBM' => $baseDir . '/src/Database/DBM.php',
'Friendica\\Network\\Probe' => $baseDir . '/src/Network/Probe.php',
'Friendica\\ParseUrl' => $baseDir . '/src/ParseUrl.php',
'Friendica\\Protocol\\DFRN' => $baseDir . '/src/Protocol/DFRN.php',
'Friendica\\Protocol\\Diaspora' => $baseDir . '/src/Protocol/Diaspora.php',
'Friendica\\Util\\Lock' => $baseDir . '/src/Util/Lock.php',
'HTMLPurifier' => $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier.php',
'HTMLPurifier_Arborize' => $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php',

1
vendor/composer/autoload_files.php vendored
View file

@ -6,5 +6,6 @@ $vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);
return array(
'5255c38a0faeba867671b61dfda6d864' => $vendorDir . '/paragonie/random_compat/lib/random.php',
'2cffec82183ee1cea088009cef9a6fc3' => $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
);

1
vendor/composer/autoload_psr4.php vendored
View file

@ -8,4 +8,5 @@ $baseDir = dirname($vendorDir);
return array(
'League\\HTMLToMarkdown\\' => array($vendorDir . '/league/html-to-markdown/src'),
'Friendica\\' => array($baseDir . '/src'),
'Defuse\\Crypto\\' => array($vendorDir . '/defuse/php-encryption/src'),
);

28
vendor/composer/autoload_static.php vendored
View file

@ -7,6 +7,7 @@ namespace Composer\Autoload;
class ComposerStaticInitFriendica
{
public static $files = array (
'5255c38a0faeba867671b61dfda6d864' => __DIR__ . '/..' . '/paragonie/random_compat/lib/random.php',
'2cffec82183ee1cea088009cef9a6fc3' => __DIR__ . '/..' . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
);
@ -19,6 +20,10 @@ class ComposerStaticInitFriendica
array (
'Friendica\\' => 10,
),
'D' =>
array (
'Defuse\\Crypto\\' => 14,
),
);
public static $prefixDirsPsr4 = array (
@ -30,6 +35,10 @@ class ComposerStaticInitFriendica
array (
0 => __DIR__ . '/../..' . '/src',
),
'Defuse\\Crypto\\' =>
array (
0 => __DIR__ . '/..' . '/defuse/php-encryption/src',
),
);
public static $prefixesPsr0 = array (
@ -59,13 +68,32 @@ class ComposerStaticInitFriendica
public static $classMap = array (
'Archive_Tar' => __DIR__ . '/..' . '/pear-pear.php.net/Archive_Tar/Archive/Tar.php',
'Console_Getopt' => __DIR__ . '/..' . '/pear-pear.php.net/Console_Getopt/Console/Getopt.php',
'Defuse\\Crypto\\Core' => __DIR__ . '/..' . '/defuse/php-encryption/src/Core.php',
'Defuse\\Crypto\\Crypto' => __DIR__ . '/..' . '/defuse/php-encryption/src/Crypto.php',
'Defuse\\Crypto\\DerivedKeys' => __DIR__ . '/..' . '/defuse/php-encryption/src/DerivedKeys.php',
'Defuse\\Crypto\\Encoding' => __DIR__ . '/..' . '/defuse/php-encryption/src/Encoding.php',
'Defuse\\Crypto\\Exception\\BadFormatException' => __DIR__ . '/..' . '/defuse/php-encryption/src/Exception/BadFormatException.php',
'Defuse\\Crypto\\Exception\\CryptoException' => __DIR__ . '/..' . '/defuse/php-encryption/src/Exception/CryptoException.php',
'Defuse\\Crypto\\Exception\\EnvironmentIsBrokenException' => __DIR__ . '/..' . '/defuse/php-encryption/src/Exception/EnvironmentIsBrokenException.php',
'Defuse\\Crypto\\Exception\\IOException' => __DIR__ . '/..' . '/defuse/php-encryption/src/Exception/IOException.php',
'Defuse\\Crypto\\Exception\\WrongKeyOrModifiedCiphertextException' => __DIR__ . '/..' . '/defuse/php-encryption/src/Exception/WrongKeyOrModifiedCiphertextException.php',
'Defuse\\Crypto\\File' => __DIR__ . '/..' . '/defuse/php-encryption/src/File.php',
'Defuse\\Crypto\\Key' => __DIR__ . '/..' . '/defuse/php-encryption/src/Key.php',
'Defuse\\Crypto\\KeyOrPassword' => __DIR__ . '/..' . '/defuse/php-encryption/src/KeyOrPassword.php',
'Defuse\\Crypto\\KeyProtectedByPassword' => __DIR__ . '/..' . '/defuse/php-encryption/src/KeyProtectedByPassword.php',
'Defuse\\Crypto\\RuntimeTests' => __DIR__ . '/..' . '/defuse/php-encryption/src/RuntimeTests.php',
'Detection\\MobileDetect' => __DIR__ . '/..' . '/mobiledetect/mobiledetectlib/namespaced/Detection/MobileDetect.php',
'Friendica\\App' => __DIR__ . '/../..' . '/src/App.php',
'Friendica\\Core\\Config' => __DIR__ . '/../..' . '/src/Core/Config.php',
'Friendica\\Core\\NotificationsManager' => __DIR__ . '/../..' . '/src/Core/NotificationsManager.php',
'Friendica\\Core\\PConfig' => __DIR__ . '/../..' . '/src/Core/PConfig.php',
'Friendica\\Core\\System' => __DIR__ . '/../..' . '/src/Core/System.php',
'Friendica\\Core\\Worker' => __DIR__ . '/../..' . '/src/Core/Worker.php',
'Friendica\\Database\\DBM' => __DIR__ . '/../..' . '/src/Database/DBM.php',
'Friendica\\Network\\Probe' => __DIR__ . '/../..' . '/src/Network/Probe.php',
'Friendica\\ParseUrl' => __DIR__ . '/../..' . '/src/ParseUrl.php',
'Friendica\\Protocol\\DFRN' => __DIR__ . '/../..' . '/src/Protocol/DFRN.php',
'Friendica\\Protocol\\Diaspora' => __DIR__ . '/../..' . '/src/Protocol/Diaspora.php',
'Friendica\\Util\\Lock' => __DIR__ . '/../..' . '/src/Util/Lock.php',
'HTMLPurifier' => __DIR__ . '/..' . '/ezyang/htmlpurifier/library/HTMLPurifier.php',
'HTMLPurifier_Arborize' => __DIR__ . '/..' . '/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php',

115
vendor/composer/installed.json vendored
View file

@ -442,5 +442,120 @@
],
"description": "Identify human languages from text samples",
"homepage": "http://pear.php.net/package/Text_LanguageDetect"
},
{
"name": "paragonie/random_compat",
"version": "v2.0.11",
"version_normalized": "2.0.11.0",
"source": {
"type": "git",
"url": "https://github.com/paragonie/random_compat.git",
"reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/paragonie/random_compat/zipball/5da4d3c796c275c55f057af5a643ae297d96b4d8",
"reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8",
"shasum": ""
},
"require": {
"php": ">=5.2.0"
},
"require-dev": {
"phpunit/phpunit": "4.*|5.*"
},
"suggest": {
"ext-libsodium": "Provides a modern crypto API that can be used to generate random bytes."
},
"time": "2017-09-27T21:40:39+00:00",
"type": "library",
"installation-source": "dist",
"autoload": {
"files": [
"lib/random.php"
]
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Paragon Initiative Enterprises",
"email": "security@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"description": "PHP 5.x polyfill for random_bytes() and random_int() from PHP 7",
"keywords": [
"csprng",
"pseudorandom",
"random"
]
},
{
"name": "defuse/php-encryption",
"version": "v2.1.0",
"version_normalized": "2.1.0.0",
"source": {
"type": "git",
"url": "https://github.com/defuse/php-encryption.git",
"reference": "5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/defuse/php-encryption/zipball/5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689",
"reference": "5176f5abb38d3ea8a6e3ac6cd3bbb54d8185a689",
"shasum": ""
},
"require": {
"ext-openssl": "*",
"paragonie/random_compat": "~2.0",
"php": ">=5.4.0"
},
"require-dev": {
"nikic/php-parser": "^2.0|^3.0",
"phpunit/phpunit": "^4|^5"
},
"time": "2017-05-18T21:28:48+00:00",
"bin": [
"bin/generate-defuse-key"
],
"type": "library",
"installation-source": "dist",
"autoload": {
"psr-4": {
"Defuse\\Crypto\\": "src"
}
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Taylor Hornby",
"email": "taylor@defuse.ca",
"homepage": "https://defuse.ca/"
},
{
"name": "Scott Arciszewski",
"email": "info@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"description": "Secure PHP Encryption Library",
"keywords": [
"aes",
"authenticated encryption",
"cipher",
"crypto",
"cryptography",
"encrypt",
"encryption",
"openssl",
"security",
"symmetric key cryptography"
]
}
]

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*~
/test/unit/File/big-generated-file
/composer.lock
/vendor
defuse-crypto.phar
defuse-crypto.phar.sig
composer.phar
box.phar
phpunit.phar
phpunit.phar.asc
test/unit/File/tmp

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<?php
$config = Symfony\CS\Config\Config::create()
->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
->fixers([
'blankline_after_open_tag',
'empty_return',
'extra_empty_lines',
'function_typehint_space',
'join_function',
'method_argument_default_value',
'multiline_array_trailing_comma',
'no_blank_lines_after_class_opening',
'no_empty_lines_after_phpdocs',
'phpdoc_indent',
'phpdoc_no_access',
'phpdoc_no_empty_return',
'phpdoc_no_package',
'phpdoc_params',
'phpdoc_scalar',
'phpdoc_separation',
'phpdoc_trim',
'phpdoc_type_to_var',
'phpdoc_types',
'phpdoc_var_without_name',
'remove_leading_slash_use',
'remove_lines_between_uses',
'short_bool_cast',
'single_quote',
'spaces_after_semicolon',
'spaces_before_semicolon',
'spaces_cast',
'standardize_not_equal',
'ternary_spaces',
'trim_array_spaces',
'unneeded_control_parentheses',
'unused_use',
'whitespacy_lines',
'align_double_arrow',
'concat_with_spaces',
'logical_not_operators_with_successor_space',
'multiline_spaces_before_semicolon',
'newline_after_open_tag',
'ordered_use',
'php_unit_construct',
'phpdoc_order',
'short_array_syntax',
]);
if (null === $input->getArgument('path')) {
$config
->finder(
Symfony\CS\Finder\DefaultFinder::create()
->in('src')
->in('test')
->exclude('vendor')
);
}
return $config;

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The MIT License (MIT)
Copyright (c) 2016 Taylor Hornby <https://defuse.ca> and Paragon Initiative
Enterprises <https://paragonie.com>.
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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php-encryption
===============
[![Build Status](https://travis-ci.org/defuse/php-encryption.svg?branch=master)](https://travis-ci.org/defuse/php-encryption)
This is a library for encrypting data with a key or password in PHP. **It
requires PHP 5.4 or newer.** The current version is v2.0.0, which is expected to
remain stable and supported by its authors with security and bugfixes until at
least January 1st, 2019.
The library is a joint effort between [Taylor Hornby](https://defuse.ca/) and
[Scott Arciszewski](https://paragonie.com/blog/author/scott-arcizewski) as well
as numerous open-source contributors.
What separates this library from other PHP encryption libraries is, firstly,
that it is secure. The authors used to encounter insecure PHP encryption code on
a daily basis, so they created this library to bring more security to the
ecosystem. Secondly, this library is "difficult to misuse." Like
[libsodium](https://github.com/jedisct1/libsodium), its API is designed to be
easy to use in a secure way and hard to use in an insecure way.
Dependencies
------------
This library requres no special dependencies except for PHP 5.4 or newer with
the OpenSSL extensions enabled (this is the default). It uses
[random\_compat](https://github.com/paragonie/random_compat), which is bundled
in with this library so that your users will not need to follow any special
installation steps.
Getting Started
----------------
Start with the [**Tutorial**](docs/Tutorial.md). You can find instructions for
obtaining this library's code securely in the [Installing and
Verifying](docs/InstallingAndVerifying.md) documentation.
After you've read the tutorial and got the code, refer to the formal
documentation for each of the classes this library provides:
- [Crypto](docs/classes/Crypto.md)
- [File](docs/classes/File.md)
- [Key](docs/classes/Key.md)
- [KeyProtectedByPassword](docs/classes/KeyProtectedByPassword.md)
If you encounter difficulties, see the [FAQ](docs/FAQ.md) answers. The fixes to
the most commonly-reported problems are explained there.
If you're a cryptographer and want to understand the nitty-gritty details of how
this library works, look at the [Cryptography Details](docs/CryptoDetails.md)
documentation.
If you're interested in contributing to this library, see the [Internal
Developer Documentation](docs/InternalDeveloperDocs.md).
Examples
---------
If the documentation is not enough for you to understand how to use this
library, then you can look at an example project that uses this library:
- [encutil](https://github.com/defuse/encutil)
- [fileencrypt](https://github.com/tsusanka/fileencrypt)
Security Audit Status
---------------------
This code has not been subjected to a formal, paid, security audit. However, it
has received lots of review from members of the PHP security community, and the
authors are experienced with cryptography. In all likelihood, you are safer
using this library than almost any other encryption library for PHP.
If you use this library as a part of your business and would like to help fund
a formal audit, please [contact Taylor Hornby](https://defuse.ca/contact.htm).
Public Keys
------------
The GnuPG public key used to sign releases is available in
[dist/signingkey.asc](https://github.com/defuse/php-encryption/raw/master/dist/signingkey.asc). Its fingerprint is:
```
2FA6 1D8D 99B9 2658 6BAC 3D53 385E E055 A129 1538
```
You can verify it against the Taylor Hornby's [contact
page](https://defuse.ca/contact.htm) and
[twitter](https://twitter.com/DefuseSec/status/723741424253059074).

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#!/usr/bin/env php
<?php
use Defuse\Crypto\Key;
foreach ([__DIR__ . '/../../../autoload.php', __DIR__ . '/../vendor/autoload.php'] as $file) {
if (file_exists($file)) {
require $file;
break;
}
}
$key = Key::createNewRandomKey();
echo $key->saveToAsciiSafeString(), "\n";

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{
"name": "defuse/php-encryption",
"description": "Secure PHP Encryption Library",
"license": "MIT",
"keywords": ["security", "encryption", "AES", "openssl", "cipher", "cryptography", "symmetric key cryptography", "crypto", "encrypt", "authenticated encryption"],
"authors": [
{
"name": "Taylor Hornby",
"email": "taylor@defuse.ca",
"homepage": "https://defuse.ca/"
},
{
"name": "Scott Arciszewski",
"email": "info@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"autoload": {
"psr-4": {
"Defuse\\Crypto\\": "src"
}
},
"require": {
"paragonie/random_compat": "~2.0",
"ext-openssl": "*",
"php": ">=5.4.0"
},
"require-dev": {
"phpunit/phpunit": "^4|^5",
"nikic/php-parser": "^2.0|^3.0"
},
"bin": [
"bin/generate-defuse-key"
]
}

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# This builds defuse-crypto.phar. To run this Makefile, `box` and `composer`
# must be installed and in your $PATH. Run it from inside the dist/ directory.
box := $(shell which box)
composer := "composer"
.PHONY: all
all: build-phar
.PHONY: sign-phar
sign-phar:
gpg -u 7B4B2D98 --armor --output defuse-crypto.phar.sig --detach-sig defuse-crypto.phar
# ensure we run in clean tree. export git tree and run there.
.PHONY: build-phar
build-phar:
@echo "Creating .phar from revision $(shell git rev-parse HEAD)."
rm -rf worktree
install -d worktree
(cd $(CURDIR)/..; git archive HEAD) | tar -x -C worktree
$(MAKE) -f $(CURDIR)/Makefile -C worktree defuse-crypto.phar
mv worktree/*.phar .
rm -rf worktree
.PHONY: clean
clean:
rm -vf defuse-crypto.phar defuse-crypto.phar.sig
# Inside workdir/:
defuse-crypto.phar: dist/box.json composer.lock
cp dist/box.json .
php -d phar.readonly=0 $(box) build -c box.json -v
composer.lock:
$(composer) install --no-dev

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{
"chmod": "0755",
"finder": [
{
"in": "src",
"name": "*.php"
},
{
"in": "vendor/composer",
"name": "*.php"
},
{
"in": "vendor/paragonie",
"name": "*.php",
"exclude": "other"
}
],
"compactors": [
"Herrera\\Box\\Compactor\\Php"
],
"main": "vendor/autoload.php",
"output": "defuse-crypto.phar",
"shebang": false,
"stub": true
}

52
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-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2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=lmD7
-----END PGP PUBLIC KEY BLOCK-----

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Cryptography Details
=====================
Here is a high-level description of how this library works. Any discrepancy
between this documentation and the actual implementation will be considered
a security bug.
Let's start with the following definitions:
- HKDF-SHA256(*k*, *n*, *info*, *s*) is the key derivation function specified in
RFC 5869 (using the SHA256 hash function). The parameters are:
- *k*: The initial keying material.
- *n*: The number of output bytes.
- *info*: The info string.
- *s*: The salt.
- AES-256-CTR(*m*, *k*, *iv*) is AES-256 encryption in CTR mode. The parameters
are:
- *m*: An arbitrary-length (possibly zero-length) message.
- *k*: A 32-byte key.
- *iv*: A 16-byte initialization vector (nonce).
- PBKDF2-SHA256(*p*, *s*, *i*, *n*) is the password-based key derivation
function defined in RFC 2898 (using the SHA256 hash function). The parameters
are:
- *p*: The password string.
- *s*: The salt string.
- *i*: The iteration count.
- *n*: The output length in bytes.
- VERSION is the string `"\xDE\xF5\x02\x00"`.
- AUTHINFO is the string `"DefusePHP|V2|KeyForAuthentication"`.
- ENCRINFO is the string `"DefusePHP|V2|KeyForEncryption"`.
To encrypt a message *m* using a 32-byte key *k*, the following steps are taken:
1. Generate a random 32-byte string *salt*.
2. Derive the 32-byte authentication key *akey* = HKDF-SHA256(*k*, 32, AUTHINFO, *salt*).
3. Derive the 32-byte encryption key *ekey* = HKDF-SHA256(*k*, 32, ENCRINFO, *salt*).
4. Generate a random 16-byte initialization vector *iv*.
5. Compute *c* = AES-256-CTR(*m*, *ekey*, *iv*).
6. Combine *ctxt* = VERSION || *salt* || *iv* || *c*.
7. Compute *h* = HMAC-SHA256(*ctxt*, *akey*).
8. Output *ctxt* || *h*.
Decryption is roughly the reverse process (see the code for details, since the
security of the decryption routine is highly implementation-dependent).
For encryption using a password *p*, steps 1-3 above are replaced by:
1. Generate a random 32-byte string *salt*.
2. Compute *k* = PBKDF2-SHA256(SHA256(*p*), *salt*, 100000, 32).
3. Derive the 32-byte authentication key *akey* = HKDF-SHA256(*k*, 32, AUTHINFO, *salt*)
4. Derive the 32-byte encryption key *ekey* = HKDF-SHA256(*k*, 32, ENCRINFO, *salt*)
The remainder of the process is the same. Notice the reuse of the same *salt*
for PBKDF2-SHA256 and HKDF-SHA256. The prehashing of the password in step 2 is
done to prevent a [DoS attack using long
passwords](https://github.com/defuse/php-encryption/issues/230).
For `KeyProtectedByPassword`, the serialized key is encrypted according to the
password encryption defined above. However, the actual password used for
encryption is the SHA256 hash of the password the user provided. This is done in
order to provide domain separation between the message encryption in the user's
application and the internal key encryption done by this library. It fixes
a [key replacement chosen-protocol
attack](https://github.com/defuse/php-encryption/issues/240).

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Frequently Asked Questions
===========================
How do I use this library to encrypt passwords?
------------------------------------------------
Passwords should not be encrypted, they should be hashed with a *slow* password
hashing function that's designed to slow down password guessing attacks. See
[How to Safely Store Your Users' Passwords in
2016](https://paragonie.com/blog/2016/02/how-safely-store-password-in-2016).
How do I give it the same key every time instead of a new random key?
----------------------------------------------------------------------
A `Key` object can be saved to a string by calling its `saveToAsciiSafeString()`
method. You will have to save that string somewhere safe, and then load it back
into a `Key` object using `Key`'s `loadFromAsciiSafeString` static method.
Where you store the string depends on your application. For example if you are
using `KeyProtectedByPassword` to encrypt files with a user's login password,
then you should not store the `Key` at all. If you are protecting sensitive data
on a server that may be compromised, then you should store it in a hardware
security module. When in doubt, consult a security expert.
Why is an EnvironmentIsBrokenException getting thrown?
-------------------------------------------------------
Either you've encountered a bug in this library, or your system doesn't support
the use of this library. For example, if your system does not have a secure
random number generator, this library will refuse to run, by throwing that
exception, instead of falling back to an insecure random number generator.
Why am I getting a BadFormatException when loading a Key from a string?
------------------------------------------------------------------------
If you're getting this exception, then the string you're giving to
`loadFromAsciiSafeString()` is *not* the same as the string you got from
`saveToAsciiSafeString()`. Perhaps your database column isn't wide enough and
it's truncating the string as you insert it?

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Getting The Code
=================
There are two ways to use this library in your applications. You can either:
1. Use [Composer](https://getcomposer.org/), or
2. `require_once` a single `.phar` file in your application.
If you are not using either option (for example, because you're using Git submodules), you may need to write your own autoloader ([example](https://gist.github.com/paragonie-scott/949daee819bb7f19c50e5e103170b400)).
Option 1: Using Composer
-------------------------
Run this inside the directory of your composer-enabled project:
```sh
composer require defuse/php-encryption
```
Unfortunately, composer doesn't provide a way for you to verify that the code
you're getting was signed by this library's authors. If you want a more secure
option, use the `.phar` method described below.
Option 2: Including a PHAR
----------------------------
The `.phar` option lets you include this library into your project simply by
calling `require_once` on a single file. Download `defuse-crypto.phar` and
`defuse-crypto.phar.sig` from this project's
[releases](https://github.com/defuse/php-encryption/releases) page.
You should verify the integrity of the `.phar`. The `defuse-crypto.phar.sig`
contains the signature of `defuse-crypto.phar`. It is signed with Taylor
Hornby's PGP key. You can find Taylor's public key in `dist/signingkey.asc`. You
can verify the public key's fingerprint against the Taylor Hornby's [contact
page](https://defuse.ca/contact.htm) and
[twitter](https://twitter.com/DefuseSec/status/723741424253059074).
Once you have verified the signature, it is safe to use the `.phar`. Place it
somewhere in your file system, e.g. `/var/www/lib/defuse-crypto.phar`, and then
pass that path to `require_once`.
```php
<?php
require_once('/var/www/lib/defuse-crypto.phar');
// ... the Crypto, File, Key, and KeyProtectedByPassword classes are now
// available ...
// ...
```

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Information for the Developers of php-encryption
=================================================
Status
-------
This library is currently frozen under a long-term support release. We do not
plan to add any new features. We will maintain the library by fixing any bugs
that are reported, or security vulnerabilities that are found.
Development Environment
------------------------
Development is done on Linux. To run the tests, you will need to have the
following tools installed:
- `php` (with OpenSSL enabled, if you're compiling from source).
- `gpg`
- `composer`
Running the Tests
------------------
First do `composer install` and then you can run the tests by running
`./test.sh`. This will download a PHPUnit PHAR, verify its cryptographic
signatures, and then use it to run the tests in `test/unit`.
Getting and Using Psalm
-----------------------
[Psalm](https://github.com/vimeo/psalm) is a static analysis suite for PHP projects.
We use Psalm to ensure type safety throughout our library.
To install Psalm, you just need to run one command:
composer require --dev "vimeo/psalm:dev-master"
To verify that your code changes are still strictly type-safe, run the following
command:
vendor/bin/psalm
Reporting Bugs
---------------
Please report bugs, even critical security vulnerabilities, by opening an issue
on GitHub. We recommend disclosing security vulnerabilities found in this
library *publicly* as soon as possible.
Philosophy
-----------
This library is developed around several core values:
- Rule #1: Security is prioritized over everything else.
> Whenever there is a conflict between security and some other property,
> security will be favored. For example, the library has runtime tests,
> which make it slower, but will hopefully stop it from encrypting stuff
> if the platform it's running on is broken.
- Rule #2: It should be difficult to misuse the library.
> We assume the developers using this library have no experience with
> cryptography. We only assume that they know that the "key" is something
> you need to encrypt and decrypt the messages, and that it must be kept
> secret. Whenever possible, the library should refuse to encrypt or decrypt
> messages when it is not being used correctly.
- Rule #3: The library aims only to be compatible with itself.
> Other PHP encryption libraries try to support every possible type of
> encryption, even the insecure ones (e.g. ECB mode). Because there are so
> many options, inexperienced developers must decide whether to use "CBC
> mode" or "ECB mode" when both are meaningless terms to them. This
> inevitably leads to vulnerabilities.
> This library will only support one secure mode. A developer using this
> library will call "encrypt" and "decrypt" methods without worrying about
> how they are implemented.
- Rule #4: The library should require no special installation.
> Some PHP encryption libraries, like libsodium-php, are not straightforward
> to install and cannot packaged with "just download and extract"
> applications. This library will always be just a handful of PHP files that
> you can copy to your source tree and require().
Publishing Releases
--------------------
To make a release, you will need to install [composer](https://getcomposer.org/)
and [box](https://github.com/box-project/box2) on your system. They will need to
be available in your `$PATH` so that running the commands `composer` and `box`
in your terminal run them, respectively. You will also need the private key for
signing (ID: 7B4B2D98) available.
Once you have those tools installed and the key available follow these steps:
**Remember to set the version number in `composer.json`!**
Make a fresh clone of the repository:
```
git clone <url>
```
Check out the branch you want to release:
```
git checkout <branchname>
```
Check that the version number in composer.json is correct:
```
cat composer.json
```
Run the tests:
```
composer install
./test.sh
```
Generate the `.phar`:
```
cd dist
make build-phar
```
Test the `.phar`:
```
cd ../
./test.sh dist/defuse-crypto.phar
```
Sign the `.phar`:
```
cd dist
make sign-phar
```
Tag the release:
```
git -c user.signingkey=7B4B2D98 tag -s "<TAG NAME>" -m "<TAG MESSAGE>"
```
`<TAG NAME>` should be in the format `v2.0.0` and `<TAG MESSAGE>` should look
like "Release of v2.0.0."
Push the tag to github, then use the
[releases](https://github.com/defuse/php-encryption/releases) page to draft
a new release for that tag. Upload the `.phar` and the `.phar.sig` file to be
included as part of that release.

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Tutorial
=========
Hello! If you're reading this file, it's because you want to add encryption to
one of your PHP projects. My job, as the person writing this documentation, is
to help you make sure you're doing the right thing and then show you how to use
this library to do it. To help me help you, please read the documentation
*carefully* and *deliberately*.
A Word of Caution
------------------
Encryption is not magic dust you can sprinkle on a system to make it more
secure. The way encryption is integrated into a system's design needs to be
carefully thought out. Sometimes, encryption is the wrong thing to use. Other
times, encryption needs to be used in a very specific way in order for it to
work as intended. Even if you are sure of what you are doing, we strongly
recommend seeking advice from an expert.
The first step is to think about your application's threat model. Ask yourself
the following questions. Who will want to attack my application, and what will
they get out of it? Are they trying to steal some information? Trying to alter
or destroy some information? Or just trying to make the system go down so people
can't access it? Then ask yourself how encryption can help combat those threats.
If you're going to add encryption to your application, you should have a very
clear idea of exactly which kinds of attacks it's helping to secure your
application against. Once you have your threat model, think about what kinds of
attacks it *does not* cover, and whether or not you should improve your threat
model to include those attacks.
**This isn't for storing user login passwords:** The most common use of
cryptography in web applications is to protect the users' login passwords. If
you're trying to use this library to "encrypt" your users' passwords, you're in
the wrong place. Passwords shouldn't be *encrypted*, they should be *hashed*
with a slow computation-heavy function that makes password guessing attacks more
expensive. See [How to Safely Store Your Users' Passwords in
2016](https://paragonie.com/blog/2016/02/how-safely-store-password-in-2016).
**This isn't for encrypting network communication:** Likewise, if you're trying
to encrypt messages sent between two parties over the Internet, you don't want
to be using this library. For that, set up a TLS connection between the two
points, or, if it's a chat app, use the [Signal
Protocol](https://whispersystems.org/blog/advanced-ratcheting/).
What this library provides is symmetric encryption for "data at rest." This
means it is not suitable for use in building protocols where "data is in motion"
(i.e. moving over a network) except in limited set of cases.
Getting the Code
-----------------
There are several different ways to obtain this library's code and to add it to
your project. Even if you've already cloned the code from GitHub, you should
take steps to verify the cryptographic signatures to make sure the code you got
was not intercepted and modified by an attacker.
Please head over to the [**Installing and
Verifying**](InstallingAndVerifying.md) documentation to get the code, and then
come back here to continue the tutorial.
Using the Library
------------------
I'm going to assume you know what symmetric encryption is, and the difference
between symmetric and asymmetric encryption. If you don't, I recommend taking
[Dan Boneh's Cryptography I course](https://www.coursera.org/learn/crypto/) on
Coursera.
To give you a quick introduction to the library, I'm going to explain how it
would be used in two sterotypical scenarios. Hopefully, one of these sterotypes
is close enough to what you want to do that you'll be able to figure out what
needs to be different on your own.
### Formal Documentation
While this tutorial should get you up and running fast, it's important to
understand how this library behaves. Please make sure to read the formal
documentation of all of the functions you're using, since there are some
important security warnings there.
The following classes are available for you to use:
- [Crypto](classes/Crypto.md): Encrypting and decrypting strings.
- [File](classes/File.md): Encrypting and decrypting files.
- [Key](classes/Key.md): Represents a secret encryption key.
- [KeyProtectedByPassword](classes/KeyProtectedByPassword.md): Represents
a secret encryption key that needs to be "unlocked" by a password before it
can be used.
### Scenario #1: Keep data secret from the database administrator
In this scenario, our threat model is as follows. Alice is a server
administrator responsible for managing a trusted web server. Eve is a database
administrator responsible for managing a database server. Dave is a web
developer working on code that will eventually run on the trusted web server.
Let's say Alice and Dave trust each other, and Alice is going to host Dave's
application on her server. But both Alice and Dave don't trust Eve. They know
Eve is a good database administrator, but she might have incentive to steal the
data from the database. They want to keep some of the web application's data
secret from Eve.
In order to do that, Alice will use the included `generate-defuse-key` script
which generates a random encryption key and prints it to standard output:
```sh
$ composer require defuse/php-encryption
$ vendor/bin/generate-defuse-key
```
Alice will run this script once and save the output to a configuration file, say
in `/etc/daveapp-secret-key.txt` and set the file permissions so that only the
user that the website PHP scripts run as can access it.
Dave will write his code to load the key from the configuration file:
```php
<?php
use Defuse\Crypto\Key;
function loadEncryptionKeyFromConfig()
{
$keyAscii = // ... load the contents of /etc/daveapp-secret-key.txt
return Key::loadFromAsciiSafeString($keyAscii);
}
```
Then, whenever Dave wants to save a secret value to the database, he will first
encrypt it:
```php
<?php
use Defuse\Crypto\Crypto;
// ...
$key = loadEncryptionKeyFromConfig();
// ...
$ciphertext = Crypto::encrypt($secret_data, $key);
// ... save $ciphertext into the database ...
```
Whenever Dave wants to get the value back from the database, he must decrypt it
using the same key:
```php
<?php
use Defuse\Crypto\Crypto;
// ...
$key = loadEncryptionKeyFromConfig();
// ...
$ciphertext = // ... load $ciphertext from the database
try {
$secret_data = Crypto::decrypt($ciphertext, $key);
} catch (\Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException $ex) {
// An attack! Either the wrong key was loaded, or the ciphertext has
// changed since it was created -- either corrupted in the database or
// intentionally modified by Eve trying to carry out an attack.
// ... handle this case in a way that's suitable to your application ...
}
```
Note that if anyone ever steals the key from Alice's server, they can decrypt
all of the ciphertexts that are stored in the database. As part of our threat
model, we are assuming Alice's server administration skills and Dave's secure
coding skills are good enough to stop Eve from being able to steal the key.
Under those assumptions, this solution will prevent Eve from seeing data that's
stored in the database.
However, notice that our threat model says nothing about what could happen if
Eve wants to *modify* the data. With this solution, Eve will not be able to
alter any individual ciphertext (because each ciphertext has its own
cryptographic integrity check), but Eve *will* be able to swap ciphertexts for
one another, and revert ciphertexts to what they used to be at previous times.
If we needed to defend against such attacks, we would have to re-design our
threat model and come up with a different solution.
### Scenario #2: Encrypting account data with the user's login password
This scenario is like Scenario 1, but subtly different. The threat model is as
follows. We have Alice, a server administrator, and Dave, the developer. Alice
and Dave trust each other, and Alice wants to host Dave's web application,
including its database, on her server. Alice is worried about her server getting
hacked. The application will store the users' credit card numbers, and Alice
wants to protect them in case the server gets hacked.
We can model the situation like this: after the server gets hacked, the attacker
will have read and write access to all data on it until the attack is detected
and Alice rebuilds the server. We'll call the time the attacker has access to
the server the *exposure window.* One idea to minimize loss is to encrypt the
users' credit card numbers using a key made from their login password. Then, as
long as the users all have strong passwords, and they are never logged in during
the exposure window, their credit cards will be protected from the attacker.
To implement this, Dave will use the `KeyProtectedByPassword` class. When a new
user account is created, Dave will save a new key to their account, one that's
protected by their login password:
```php
<?php
use Defuse\Crypto\KeyProtectedByPassword;
function CreateUserAccount($username, $password)
{
// ... other user account creation stuff, including password hashing
$protected_key = KeyProtectedByPassword::createRandomPasswordProtectedKey($password);
$protected_key_encoded = $protected_key->saveToAsciiSafeString();
// ... save $protected_key_encoded into the user's account record
}
```
Then, when the user logs in, Dave's code will load the protected key from the
user's account record, unlock it to get a `Key` object, and save the `Key`
object somewhere safe (like temporary memory-backed session storage). Note that
wherever Dave's code saves the key, it must be destroyed once the user logs out,
or else the attacker might be able to find users' keys even if they were never
logged in during the attack.
```php
<?php
use Defuse\Crypto\KeyProtectedByPassword;
// ... authenticate the user using a good password hashing scheme
// keep the user's password in $password
$protected_key_encoded = // ... load it from the user's account record
$protected_key = KeyProtectedByPassword::loadFromAsciiSafeString($protected_key_encoded);
$user_key = $protected_key->unlockKey($password);
$user_key_encoded = $user_key->saveToAsciiSafeString();
// ... save $user_key_encoded in the session
```
```php
<?php
// ... when the user is logging out ...
// ... securely wipe the saved $user_key_encoded from the system ...
```
When a user adds their credit card number, Dave's code will get the key from the
session and use it to encrypt the credit card number:
```php
<?php
use Defuse\Crypto\Crypto;
use Defuse\Crypto\Key;
// ...
$user_key_encoded = // ... get it out of the session ...
$user_key = Key::loadFromAsciiSafeString($user_key_encoded);
// ...
$credit_card_number = // ... get credit card number from the user
$encrypted_card_number = Crypto::encrypt($credit_card_number, $user_key);
// ... save $encrypted_card_number in the database
```
When the application needs to use the credit card number, it will decrypt it:
```php
<?php
use Defuse\Crypto\Crypto;
use Defuse\Crypto\Key;
// ...
$user_key_encoded = // ... get it out of the session
$user_key = Key::loadFromAsciiSafeString($user_key_encoded);
// ...
$encrypted_card_number = // ... load it from the database ...
try {
$credit_card_number = Crypto::decrypt($encrypted_card_number, $user_key);
} catch (Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException $ex) {
// Either there's a bug in our code, we're trying to decrypt with the
// wrong key, or the encrypted credit card number was corrupted in the
// database.
// ... handle this case ...
}
```
With all caveats carefully heeded, this solution limits credit card number
exposure in the case where Alice's server gets hacked for a short amount of
time. Remember to think about the attacks that *aren't* included in our threat
model. The attacker is still free to do all sorts of harmful things like
modifying the server's data which may go undetected if Alice doesn't have secure
backups to compare against.
Getting Help
-------------
If you're having difficulty using the library, see if your problem is already
solved by an answer in the [FAQ](FAQ.md).

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Upgrading From Version 1.2
===========================
With version 2.0.0 of this library came major changes to the ciphertext format,
algorithms used for encryption, and API.
In version 1.2, keys were represented by 16-byte string variables. In version
2.0.0, keys are represented by objects, instances of the `Key` class. This
change was made in order to make it harder to misuse the API. For example, in
version 1.2, you could pass in *any* 16-byte string, but in version 2.0.0 you
need a `Key` object, which you can only get if you're "doing the right thing."
This means that for all of your old version 1.2 keys, you'll have to:
1. Generate a new version 2.0.0 key.
2. For all of the ciphertexts encrypted under the old key:
1. Decrypt the ciphertext using the old version 1.2 key.
2. Re-encrypt it using the new version 2.0.0 key.
Use the special `Crypto::legacyDecrypt()` method to decrypt the old ciphertexts
using the old key and then re-encrypt them using `Crypto::encrypt()` with the
new key. Your code will look something like the following. To avoid data loss,
securely back up your keys and data before running your upgrade code.
```php
<?php
// ...
$legacy_ciphertext = // ... get the ciphertext you want to upgrade ...
$legacy_key = // ... get the key to decrypt this ciphertext ...
// Generate the new key that we'll re-encrypt the ciphertext with.
$new_key = Key::createNewRandomKey();
// ... save it somewhere ...
// Decrypt it.
try {
$plaintext = Crypto::legacyDecrypt($legacy_ciphertext, $legacy_key);
} catch (Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException $ex)
{
// ... TODO: handle this case appropriately ...
}
// Re-encrypt it.
$new_ciphertext = Crypto::encrypt($plaintext, $new_key);
// ... replace the old $legacy_ciphertext with the new $new_ciphertext
// ...
```

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Class: Defuse\Crypto\Crypto
============================
The `Crypto` class provides encryption and decryption of strings either using
a secret key or secret password. For encryption and decryption of large files,
see the `File` class.
This code for this class is in `src/Crypto.php`.
Instance Methods
-----------------
This class has no instance methods.
Static Methods
---------------
### Crypto::encrypt($plaintext, Key $key, $raw\_binary = false)
**Description:**
Encrypts a plaintext string using a secret key.
**Parameters:**
1. `$plaintext` is the string to encrypt.
2. `$key` is an instance of `Key` containing the secret key for encryption.
3. `$raw_binary` determines whether the output will be a byte string (true) or
hex encoded (false, the default).
**Return value:**
Returns a ciphertext string representing `$plaintext` encrypted with the key
`$key`. Knowledge of `$key` is required in order to decrypt the ciphertext and
recover the plaintext.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
This method runs a small and very fast set of self-tests if it is the very first
time one of the `Crypto` methods has been called. The performance overhead is
negligible and can be safely ignored in all applications.
**Cautions:**
The ciphertext returned by this method is decryptable by anyone with knowledge
of the key `$key`. It is the caller's responsibility to keep `$key` secret.
Where `$key` should be stored is up to the caller and depends on the threat
model the caller is designing their application under. If you are unsure where
to store `$key`, consult with a professional cryptographer to get help designing
your application.
### Crypto::decrypt($ciphertext, Key $key, $raw\_binary = false)
**Description:**
Decrypts a ciphertext string using a secret key.
**Parameters:**
1. `$ciphertext` is the ciphertext to be decrypted.
2. `$key` is an instance of `Key` containing the secret key for decryption.
3. `$raw_binary` must have the same value as the `$raw_binary` given to the
call to `encrypt()` that generated `$ciphertext`.
**Return value:**
If the decryption succeeds, returns a string containing the same value as the
string that was passed to `encrypt()` when `$ciphertext` was produced. Upon
a successful return, the caller can be assured that `$ciphertext` could not have
been produced except by someone with knowledge of `$key`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$key` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects and performance:**
This method runs a small and very fast set of self-tests if it is the very first
time one of the `Crypto` methods has been called. The performance overhead is
negligible and can be safely ignored in all applications.
**Cautions:**
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong key and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.
### Crypto::encryptWithPassword($plaintext, $password, $raw\_binary = false)
**Description:**
Encrypts a plaintext string using a secret password.
**Parameters:**
1. `$plaintext` is the string to encrypt.
2. `$password` is a string containing the secret password used for encryption.
3. `$raw_binary` determines whether the output will be a byte string (true) or
hex encoded (false, the default).
**Return value:**
Returns a ciphertext string representing `$plaintext` encrypted with a key
derived from `$password`. Knowledge of `$password` is required in order to
decrypt the ciphertext and recover the plaintext.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
This method is intentionally slow, using a lot of CPU resources for a fraction
of a second. It applies key stretching to the password in order to make password
guessing attacks more computationally expensive. If you need a faster way to
encrypt multiple ciphertexts under the same password, see the
`KeyProtectedByPassword` class.
This method runs a small and very fast set of self-tests if it is the very first
time one of the `Crypto` methods has been called. The performance overhead is
negligible and can be safely ignored in all applications.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
### Crypto::decryptWithPassword($ciphertext, $password, $raw\_binary = false)
**Description:**
Decrypts a ciphertext string using a secret password.
**Parameters:**
1. `$ciphertext` is the ciphertext to be decrypted.
2. `$password` is a string containing the secret password used for decryption.
3. `$raw_binary` must have the same value as the `$raw_binary` given to the
call to `encryptWithPassword()` that generated `$ciphertext`.
**Return value:**
If the decryption succeeds, returns a string containing the same value as the
string that was passed to `encryptWithPassword()` when `$ciphertext` was
produced. Upon a successful return, the caller can be assured that `$ciphertext`
could not have been produced except by someone with knowledge of `$password`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$password` is not the correct password for the given ciphertext, or if
the ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects:**
This method is intentionally slow. It applies key stretching to the password in
order to make password guessing attacks more computationally expensive. If you
need a faster way to encrypt multiple ciphertexts under the same password, see
the `KeyProtectedByPassword` class.
This method runs a small and very fast set of self-tests if it is the very first
time one of the `Crypto` methods has been called. The performance overhead is
negligible and can be safely ignored in all applications.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong password and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.
### Crypto::legacyDecrypt($ciphertext, $key)
**Description:**
Decrypts a ciphertext produced by version 1 of this library so that the
plaintext can be re-encrypted into a version 2 ciphertext. See [Upgrading from
v1.2](../UpgradingFromV1.2.md).
**Parameters:**
1. `$ciphertext` is a ciphertext produced by version 1.x of this library.
2. `$key` is a 16-byte string (*not* a Key object) containing the key that was
used with version 1.x of this library to produce `$ciphertext`.
**Return value:**
If the decryption succeeds, returns the string that was encrypted to make
`$ciphertext` by version 1.x of this library. Upon a successful return, the
caller can be assured that `$ciphertext` could not have been produced except by
someone with knowledge of `$key`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$key` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects:**
This method runs a small and very fast set of self-tests if it is the very first
time one of the `Crypto` methods has been called. The performance overhead is
negligible and can be safely ignored in all applications.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$key` may be leaked out to an attacker through the stack trace. We
recommend configuring PHP to never output stack traces (either displaying them
to the user or saving them to log files).
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong key and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.

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Class: Defuse\Crypto\File
==========================
Instance Methods
-----------------
This class has no instance methods.
Static Methods
---------------
### File::encryptFile($inputFilename, $outputFilename, Key $key)
**Description:**
Encrypts a file using a secret key.
**Parameters:**
1. `$inputFilename` is the path to a file containing the plaintext to encrypt.
2. `$outputFilename` is the path to save the ciphertext file.
3. `$key` is an instance of `Key` containing the secret key for encryption.
**Behavior:**
Encrypts the contents of the input file, writing the result to the output file.
If the output file already exists, it is overwritten.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
None.
**Cautions:**
The ciphertext output by this method is decryptable by anyone with knowledge of
the key `$key`. It is the caller's responsibility to keep `$key` secret. Where
`$key` should be stored is up to the caller and depends on the threat model the
caller is designing their application under. If you are unsure where to store
`$key`, consult with a professional cryptographer to get help designing your
application.
### File::decryptFile($inputFilename, $outputFilename, Key $key)
**Description:**
Decrypts a file using a secret key.
**Parameters:**
1. `$inputFilename` is the path to a file containing the ciphertext to decrypt.
2. `$outputFilename` is the path to save the decrypted plaintext file.
3. `$key` is an instance of `Key` containing the secret key for decryption.
**Behavior:**
Decrypts the contents of the input file, writing the result to the output file.
If the output file already exists, it is overwritten.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$key` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects and performance:**
The input ciphertext is processed in two passes. The first pass verifies the
integrity and the second pass performs the actual decryption of the file and
writing to the output file. This is done in a streaming manner so that only
a small part of the file is ever loaded into memory at a time.
**Cautions:**
Be aware that when `Defuse\Crypto\WrongKeyOrModifiedCiphertextException` is
thrown, some partial plaintext data may have been written to the output. Any
plaintext data that is output is guaranteed to be a prefix of the original
plaintext (i.e. at worst it was truncated). This can only happen if an attacker
modifies the input between the first pass (integrity check) and the second pass
(decryption) over the file.
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong key and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.
### File::encryptFileWithPassword($inputFilename, $outputFilename, $password)
**Description:**
Encrypts a file with a password.
**Parameters:**
1. `$inputFilename` is the path to a file containing the plaintext to encrypt.
2. `$outputFilename` is the path to save the ciphertext file.
3. `$password` is the password used for decryption.
**Behavior:**
Encrypts the contents of the input file, writing the result to the output file.
If the output file already exists, it is overwritten.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
This method is intentionally slow, using a lot of CPU resources for a fraction
of a second. It applies key stretching to the password in order to make password
guessing attacks more computationally expensive. If you need a faster way to
encrypt multiple ciphertexts under the same password, see the
`KeyProtectedByPassword` class.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
### File::decryptFileWithPassword($inputFilename, $outputFilename, $password)
**Description:**
Decrypts a file with a password.
**Parameters:**
1. `$inputFilename` is the path to a file containing the ciphertext to decrypt.
2. `$outputFilename` is the path to save the decrypted plaintext file.
3. `$password` is the password used for decryption.
**Behavior:**
Decrypts the contents of the input file, writing the result to the output file.
If the output file already exists, it is overwritten.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$password` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects and performance:**
This method is intentionally slow, using a lot of CPU resources for a fraction
of a second. It applies key stretching to the password in order to make password
guessing attacks more computationally expensive. If you need a faster way to
encrypt multiple ciphertexts under the same password, see the
`KeyProtectedByPassword` class.
The input ciphertext is processed in two passes. The first pass verifies the
integrity and the second pass performs the actual decryption of the file and
writing to the output file. This is done in a streaming manner so that only
a small part of the file is ever loaded into memory at a time.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
Be aware that when `Defuse\Crypto\WrongKeyOrModifiedCiphertextException` is
thrown, some partial plaintext data may have been written to the output. Any
plaintext data that is output is guaranteed to be a prefix of the original
plaintext (i.e. at worst it was truncated). This can only happen if an attacker
modifies the input between the first pass (integrity check) and the second pass
(decryption) over the file.
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong password and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.
### File::encryptResource($inputHandle, $outputHandle, Key $key)
**Description:**
Encrypts a resource (stream) with a secret key.
**Parameters:**
1. `$inputHandle` is a handle to a resource (like a file pointer) containing the
plaintext to encrypt.
2. `$outputHandle` is a handle to a resource (like a file pointer) that the
ciphertext will be written to.
3. `$key` is an instance of `Key` containing the secret key for encryption.
**Behavior:**
Encrypts the data read from the input stream and writes it to the output stream.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
None.
**Cautions:**
The ciphertext output by this method is decryptable by anyone with knowledge of
the key `$key`. It is the caller's responsibility to keep `$key` secret. Where
`$key` should be stored is up to the caller and depends on the threat model the
caller is designing their application under. If you are unsure where to store
`$key`, consult with a professional cryptographer to get help designing your
application.
### File::decryptResource($inputHandle, $outputHandle, Key $key)
**Description:**
Decrypts a resource (stream) with a secret key.
**Parameters:**
1. `$inputHandle` is a handle to a file-backed resource containing the
ciphertext to decrypt. It must be a file not a network stream or standard
input.
2. `$outputHandle` is a handle to a resource (like a file pointer) that the
plaintext will be written to.
3. `$key` is an instance of `Key` containing the secret key for decryption.
**Behavior:**
Decrypts the data read from the input stream and writes it to the output stream.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$key` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects and performance:**
The input ciphertext is processed in two passes. The first pass verifies the
integrity and the second pass performs the actual decryption of the file and
writing to the output file. This is done in a streaming manner so that only
a small part of the file is ever loaded into memory at a time.
**Cautions:**
Be aware that when `Defuse\Crypto\WrongKeyOrModifiedCiphertextException` is
thrown, some partial plaintext data may have been written to the output. Any
plaintext data that is output is guaranteed to be a prefix of the original
plaintext (i.e. at worst it was truncated). This can only happen if an attacker
modifies the input between the first pass (integrity check) and the second pass
(decryption) over the file.
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong key and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.
### File::encryptResourceWithPassword($inputHandle, $outputHandle, $password)
**Description:**
Encrypts a resource (stream) with a password.
**Parameters:**
1. `$inputHandle` is a handle to a resource (like a file pointer) containing the
plaintext to encrypt.
2. `$outputHandle` is a handle to a resource (like a file pointer) that the
ciphertext will be written to.
3. `$password` is the password used for encryption.
**Behavior:**
Encrypts the data read from the input stream and writes it to the output stream.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
This method is intentionally slow, using a lot of CPU resources for a fraction
of a second. It applies key stretching to the password in order to make password
guessing attacks more computationally expensive. If you need a faster way to
encrypt multiple ciphertexts under the same password, see the
`KeyProtectedByPassword` class.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
### File::decryptResourceWithPassword($inputHandle, $outputHandle, $password)
**Description:**
Decrypts a resource (stream) with a password.
**Parameters:**
1. `$inputHandle` is a handle to a file-backed resource containing the
ciphertext to decrypt. It must be a file not a network stream or standard
input.
2. `$outputHandle` is a handle to a resource (like a file pointer) that the
plaintext will be written to.
3. `$password` is the password used for decryption.
**Behavior:**
Decrypts the data read from the input stream and writes it to the output stream.
**Return value:**
Does not return a value.
**Exceptions:**
- `Defuse\Crypto\Exception\IOException` is thrown if there is an I/O error.
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
the `$password` is not the correct key for the given ciphertext, or if the
ciphertext has been modified (possibly maliciously). There is no way to
distinguish between these two cases.
**Side-effects and performance:**
This method is intentionally slow, using a lot of CPU resources for a fraction
of a second. It applies key stretching to the password in order to make password
guessing attacks more computationally expensive. If you need a faster way to
encrypt multiple ciphertexts under the same password, see the
`KeyProtectedByPassword` class.
The input ciphertext is processed in two passes. The first pass verifies the
integrity and the second pass performs the actual decryption of the file and
writing to the output file. This is done in a streaming manner so that only
a small part of the file is ever loaded into memory at a time.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
Be aware that when `Defuse\Crypto\WrongKeyOrModifiedCiphertextException` is
thrown, some partial plaintext data may have been written to the output. Any
plaintext data that is output is guaranteed to be a prefix of the original
plaintext (i.e. at worst it was truncated). This can only happen if an attacker
modifies the input between the first pass (integrity check) and the second pass
(decryption) over the file.
It is impossible in principle to distinguish between the case where you attempt
to decrypt with the wrong password and the case where you attempt to decrypt
a modified (corrupted) ciphertext. It is up to the caller how to best deal with
this ambiguity, as it depends on the application this library is being used in.
If in doubt, consult with a professional cryptographer.

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Class: Defuse\Crypto\Key
=========================
The `Key` class represents a secret key used for encrypting and decrypting. Once
you have a `Key` instance, you can use it with the `Crypto` class to encrypt and
decrypt strings and with the `File` class to encrypt and decrypt files.
Instance Methods
-----------------
### saveToAsciiSafeString()
**Description:**
Saves the encryption key to a string of printable ASCII characters, which can be
loaded again into a `Key` instance using `Key::loadFromAsciiSafeString()`.
**Parameters:**
This method does not take any parameters.
**Return value:**
Returns a string of printable ASCII characters representing this `Key` instance,
which can be loaded back into an instance of `Key` using
`Key::loadFromAsciiSafeString()`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
None.
**Cautions:**
This method currently returns a hexadecimal string. You should not rely on this
behavior. For example, it may be improved in the future to return a base64
string.
Static Methods
---------------
### Key::createNewRandomKey()
**Description:**
Generates a new random key and returns an instance of `Key`.
**Parameters:**
This method does not take any parameters.
**Return value:**
Returns an instance of `Key` containing a randomly-generated encryption key.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
None.
**Cautions:**
None.
### Key::loadFromAsciiSafeString($saved\_key\_string, $do\_not\_trim = false)
**Description:**
Loads an instance of `Key` that was saved to a string by
`saveToAsciiSafeString()`.
By default, this function will call `Encoding::trimTrailingWhitespace()`
to remove trailing CR, LF, NUL, TAB, and SPACE characters, which are commonly
appended to files when working with text editors.
**Parameters:**
1. `$saved_key_string` is the string returned from `saveToAsciiSafeString()`
when the original `Key` instance was saved.
2. `$do_not_trim` should be set to `TRUE` if you do not wish for the library
to automatically strip trailing whitespace from the string.
**Return value:**
Returns an instance of `Key` representing the same encryption key as the one
that was represented by the `Key` instance that got saved into
`$saved_key_string` by a call to `saveToAsciiSafeString()`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\BadFormatException` is thrown whenever
`$saved_key_string` does not represent a valid `Key` instance.
**Side-effects and performance:**
None.
**Cautions:**
None.

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Class: Defuse\Crypto\KeyProtectedByPassword
============================================
The `KeyProtectedByPassword` class represents a key that is "locked" with
a password. In order to obtain an instance of `Key` that you can use for
encrypting and decrypting, a `KeyProtectedByPassword` must first be "unlocked"
by providing the correct password.
`KeyProtectedByPassword` provides an alternative to using the
`encryptWithPassword()`, `decryptWithPassword()`, `encryptFileWithPassword()`,
and `decryptFileWithPassword()` methods with several advantages:
- The slow and computationally-expensive key stretching is run only once when
you unlock a `KeyProtectedByPassword` to obtain the `Key`.
- You do not have to keep the original password in memory to encrypt and decrypt
things. After you've obtained the `Key` from a `KeyProtectedByPassword`, the
password is no longer necessary.
Instance Methods
-----------------
### saveToAsciiSafeString()
**Description:**
Saves the protected key to a string of printable ASCII characters, which can be
loaded again into a `KeyProtectedByPassword` instance using
`KeyProtectedByPassword::loadFromAsciiSafeString()`.
**Parameters:**
This method does not take any parameters.
**Return value:**
Returns a string of printable ASCII characters representing this
`KeyProtectedByPassword` instance, which can be loaded back into an instance of
`KeyProtectedByPassword` using
`KeyProtectedByPassword::loadFromAsciiSafeString()`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
None.
**Cautions:**
This method currently returns a hexadecimal string. You should not rely on this
behavior. For example, it may be improved in the future to return a base64
string.
### unlockKey($password)
**Description:**
Unlocks the password-protected key, obtaining a `Key` which can be used for
encryption and decryption.
**Parameters:**
1. `$password` is the password required to unlock this `KeyProtectedByPassword`
to obtain the `Key`.
**Return value:**
If `$password` is the correct password, then this method returns an instance of
the `Key` class.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException` is thrown if
either the given `$password` is not the correct password for this
`KeyProtectedByPassword` or the ciphertext stored internally by this object
has been modified, i.e. it was accidentally corrupted or intentionally
corrupted by an attacker. There is no way for the caller to distinguish
between these two cases.
**Side-effects and performance:**
This method runs a small and very fast set of self-tests if it is the very first
time this method or one of the `Crypto` methods has been called. The performance
overhead is negligible and can be safely ignored in all applications.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
It is impossible in principle to distinguish between the case where you attempt
to unlock with the wrong password and the case where you attempt to unlock
a modified (corrupted) `KeyProtectedByPassword. It is up to the caller how to
best deal with this ambiguity, as it depends on the application this library is
being used in. If in doubt, consult with a professional cryptographer.
Static Methods
---------------
### KeyProtectedByPassword::createRandomPasswordProtectedKey($password)
**Description:**
Generates a new random key that's protected by the string `$password` and
returns an instance of `KeyProtectedByPassword`.
**Parameters:**
1. `$password` is the password used to protect the random key.
**Return value:**
Returns an instance of `KeyProtectedByPassword` containing a randomly-generated
encryption key that's protected by the password `$password`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
**Side-effects and performance:**
This method runs a small and very fast set of self-tests if it is the very first
time this method or one of the `Crypto` methods has been called. The performance
overhead is negligible and can be safely ignored in all applications.
**Cautions:**
PHP stack traces display (portions of) the arguments passed to methods on the
call stack. If an exception is thrown inside this call, and it is uncaught, the
value of `$password` may be leaked out to an attacker through the stack trace.
We recommend configuring PHP to never output stack traces (either displaying
them to the user or saving them to log files).
Be aware that if you protecting multiple keys with the same password, an
attacker with write access to your system will be able to swap the protected
keys around so that the wrong key gets used next time it is unlocked. This could
lead to data being encrypted with the wrong key, perhaps one that the attacker
knows.
### KeyProtectedByPassword::loadFromAsciiSafeString($saved\_key\_string)
**Description:**
Loads an instance of `KeyProtectedByPassword` that was saved to a string by
`saveToAsciiSafeString()`.
**Parameters:**
1. `$saved_key_string` is the string returned from `saveToAsciiSafeString()`
when the original `KeyProtectedByPassword` instance was saved.
**Return value:**
Returns an instance of `KeyProtectedByPassword` representing the same
password-protected key as the one that was represented by the
`KeyProtectedByPassword` instance that got saved into `$saved_key_string` by
a call to `saveToAsciiSafeString()`.
**Exceptions:**
- `Defuse\Crypto\Exception\EnvironmentIsBrokenException` is thrown either when
the platform the code is running on cannot safely perform encryption for some
reason (e.g. it lacks a secure random number generator), or the runtime tests
detected a bug in this library.
- `Defuse\Crypto\Exception\BadFormatException` is thrown whenever
`$saved_key_string` does not represent a valid `KeyProtectedByPassword`
instance.
**Side-effects and performance:**
None.
**Cautions:**
None.

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vendor/defuse/php-encryption/psalm.xml vendored Normal file
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<?xml version="1.0"?>
<psalm
stopOnFirstError="false"
useDocblockTypes="true"
>
<projectFiles>
<directory name="src" />
</projectFiles>
</psalm>

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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class Core
{
const HEADER_VERSION_SIZE = 4;
const MINIMUM_CIPHERTEXT_SIZE = 84;
const CURRENT_VERSION = "\xDE\xF5\x02\x00";
const CIPHER_METHOD = 'aes-256-ctr';
const BLOCK_BYTE_SIZE = 16;
const KEY_BYTE_SIZE = 32;
const SALT_BYTE_SIZE = 32;
const MAC_BYTE_SIZE = 32;
const HASH_FUNCTION_NAME = 'sha256';
const ENCRYPTION_INFO_STRING = 'DefusePHP|V2|KeyForEncryption';
const AUTHENTICATION_INFO_STRING = 'DefusePHP|V2|KeyForAuthentication';
const BUFFER_BYTE_SIZE = 1048576;
const LEGACY_CIPHER_METHOD = 'aes-128-cbc';
const LEGACY_BLOCK_BYTE_SIZE = 16;
const LEGACY_KEY_BYTE_SIZE = 16;
const LEGACY_HASH_FUNCTION_NAME = 'sha256';
const LEGACY_MAC_BYTE_SIZE = 32;
const LEGACY_ENCRYPTION_INFO_STRING = 'DefusePHP|KeyForEncryption';
const LEGACY_AUTHENTICATION_INFO_STRING = 'DefusePHP|KeyForAuthentication';
/*
* V2.0 Format: VERSION (4 bytes) || SALT (32 bytes) || IV (16 bytes) ||
* CIPHERTEXT (varies) || HMAC (32 bytes)
*
* V1.0 Format: HMAC (32 bytes) || IV (16 bytes) || CIPHERTEXT (varies).
*/
/**
* Adds an integer to a block-sized counter.
*
* @param string $ctr
* @param int $inc
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function incrementCounter($ctr, $inc)
{
if (Core::ourStrlen($ctr) !== Core::BLOCK_BYTE_SIZE) {
throw new Ex\EnvironmentIsBrokenException(
'Trying to increment a nonce of the wrong size.'
);
}
if (! \is_int($inc)) {
throw new Ex\EnvironmentIsBrokenException(
'Trying to increment nonce by a non-integer.'
);
}
if ($inc < 0) {
throw new Ex\EnvironmentIsBrokenException(
'Trying to increment nonce by a negative amount.'
);
}
if ($inc > PHP_INT_MAX - 255) {
throw new Ex\EnvironmentIsBrokenException(
'Integer overflow may occur.'
);
}
/*
* We start at the rightmost byte (big-endian)
* So, too, does OpenSSL: http://stackoverflow.com/a/3146214/2224584
*/
for ($i = Core::BLOCK_BYTE_SIZE - 1; $i >= 0; --$i) {
$sum = \ord($ctr[$i]) + $inc;
/* Detect integer overflow and fail. */
if (! \is_int($sum)) {
throw new Ex\EnvironmentIsBrokenException(
'Integer overflow in CTR mode nonce increment.'
);
}
$ctr[$i] = \pack('C', $sum & 0xFF);
$inc = $sum >> 8;
}
return $ctr;
}
/**
* Returns a random byte string of the specified length.
*
* @param int $octets
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function secureRandom($octets)
{
self::ensureFunctionExists('random_bytes');
try {
return \random_bytes($octets);
} catch (\Exception $ex) {
throw new Ex\EnvironmentIsBrokenException(
'Your system does not have a secure random number generator.'
);
}
}
/**
* Computes the HKDF key derivation function specified in
* http://tools.ietf.org/html/rfc5869.
*
* @param string $hash Hash Function
* @param string $ikm Initial Keying Material
* @param int $length How many bytes?
* @param string $info What sort of key are we deriving?
* @param string $salt
*
* @throws Ex\EnvironmentIsBrokenException
* @psalm-suppress UndefinedFunction - We're checking if the function exists first.
*
* @return string
*/
public static function HKDF($hash, $ikm, $length, $info = '', $salt = null)
{
static $nativeHKDF = null;
if ($nativeHKDF === null) {
$nativeHKDF = \is_callable('\\hash_hkdf');
}
if ($nativeHKDF) {
return \hash_hkdf($hash, $ikm, $length, $info, $salt);
}
$digest_length = Core::ourStrlen(\hash_hmac($hash, '', '', true));
// Sanity-check the desired output length.
if (empty($length) || ! \is_int($length) ||
$length < 0 || $length > 255 * $digest_length) {
throw new Ex\EnvironmentIsBrokenException(
'Bad output length requested of HKDF.'
);
}
// "if [salt] not provided, is set to a string of HashLen zeroes."
if (\is_null($salt)) {
$salt = \str_repeat("\x00", $digest_length);
}
// HKDF-Extract:
// PRK = HMAC-Hash(salt, IKM)
// The salt is the HMAC key.
$prk = \hash_hmac($hash, $ikm, $salt, true);
// HKDF-Expand:
// This check is useless, but it serves as a reminder to the spec.
if (Core::ourStrlen($prk) < $digest_length) {
throw new Ex\EnvironmentIsBrokenException();
}
// T(0) = ''
$t = '';
$last_block = '';
for ($block_index = 1; Core::ourStrlen($t) < $length; ++$block_index) {
// T(i) = HMAC-Hash(PRK, T(i-1) | info | 0x??)
$last_block = \hash_hmac(
$hash,
$last_block . $info . \chr($block_index),
$prk,
true
);
// T = T(1) | T(2) | T(3) | ... | T(N)
$t .= $last_block;
}
// ORM = first L octets of T
/** @var string $orm */
$orm = Core::ourSubstr($t, 0, $length);
if (!\is_string($orm)) {
throw new Ex\EnvironmentIsBrokenException();
}
return $orm;
}
/**
* Checks if two equal-length strings are the same without leaking
* information through side channels.
*
* @param string $expected
* @param string $given
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return bool
*/
public static function hashEquals($expected, $given)
{
static $native = null;
if ($native === null) {
$native = \function_exists('hash_equals');
}
if ($native) {
return \hash_equals($expected, $given);
}
// We can't just compare the strings with '==', since it would make
// timing attacks possible. We could use the XOR-OR constant-time
// comparison algorithm, but that may not be a reliable defense in an
// interpreted language. So we use the approach of HMACing both strings
// with a random key and comparing the HMACs.
// We're not attempting to make variable-length string comparison
// secure, as that's very difficult. Make sure the strings are the same
// length.
if (Core::ourStrlen($expected) !== Core::ourStrlen($given)) {
throw new Ex\EnvironmentIsBrokenException();
}
$blind = Core::secureRandom(32);
$message_compare = \hash_hmac(Core::HASH_FUNCTION_NAME, $given, $blind);
$correct_compare = \hash_hmac(Core::HASH_FUNCTION_NAME, $expected, $blind);
return $correct_compare === $message_compare;
}
/**
* Throws an exception if the constant doesn't exist.
*
* @param string $name
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
*/
public static function ensureConstantExists($name)
{
if (! \defined($name)) {
throw new Ex\EnvironmentIsBrokenException();
}
}
/**
* Throws an exception if the function doesn't exist.
*
* @param string $name
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
*/
public static function ensureFunctionExists($name)
{
if (! \function_exists($name)) {
throw new Ex\EnvironmentIsBrokenException();
}
}
/*
* We need these strlen() and substr() functions because when
* 'mbstring.func_overload' is set in php.ini, the standard strlen() and
* substr() are replaced by mb_strlen() and mb_substr().
*/
/**
* Computes the length of a string in bytes.
*
* @param string $str
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return int
*/
public static function ourStrlen($str)
{
static $exists = null;
if ($exists === null) {
$exists = \function_exists('mb_strlen');
}
if ($exists) {
$length = \mb_strlen($str, '8bit');
if ($length === false) {
throw new Ex\EnvironmentIsBrokenException();
}
return $length;
} else {
return \strlen($str);
}
}
/**
* Behaves roughly like the function substr() in PHP 7 does.
*
* @param string $str
* @param int $start
* @param int $length
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string|bool
*/
public static function ourSubstr($str, $start, $length = null)
{
static $exists = null;
if ($exists === null) {
$exists = \function_exists('mb_substr');
}
if ($exists) {
// mb_substr($str, 0, NULL, '8bit') returns an empty string on PHP
// 5.3, so we have to find the length ourselves.
if (! isset($length)) {
if ($start >= 0) {
$length = Core::ourStrlen($str) - $start;
} else {
$length = -$start;
}
}
// This is required to make mb_substr behavior identical to substr.
// Without this, mb_substr() would return false, contra to what the
// PHP documentation says (it doesn't say it can return false.)
if ($start === Core::ourStrlen($str) && $length === 0) {
return '';
}
if ($start > Core::ourStrlen($str)) {
return false;
}
$substr = \mb_substr($str, $start, $length, '8bit');
if (Core::ourStrlen($substr) !== $length) {
throw new Ex\EnvironmentIsBrokenException(
'Your version of PHP has bug #66797. Its implementation of
mb_substr() is incorrect. See the details here:
https://bugs.php.net/bug.php?id=66797'
);
}
return $substr;
}
// Unlike mb_substr(), substr() doesn't accept NULL for length
if (isset($length)) {
return \substr($str, $start, $length);
} else {
return \substr($str, $start);
}
}
/**
* Computes the PBKDF2 password-based key derivation function.
*
* The PBKDF2 function is defined in RFC 2898. Test vectors can be found in
* RFC 6070. This implementation of PBKDF2 was originally created by Taylor
* Hornby, with improvements from http://www.variations-of-shadow.com/.
*
* @param string $algorithm The hash algorithm to use. Recommended: SHA256
* @param string $password The password.
* @param string $salt A salt that is unique to the password.
* @param int $count Iteration count. Higher is better, but slower. Recommended: At least 1000.
* @param int $key_length The length of the derived key in bytes.
* @param bool $raw_output If true, the key is returned in raw binary format. Hex encoded otherwise.
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string A $key_length-byte key derived from the password and salt.
*/
public static function pbkdf2($algorithm, $password, $salt, $count, $key_length, $raw_output = false)
{
// Type checks:
if (! \is_string($algorithm)) {
throw new \InvalidArgumentException(
'pbkdf2(): algorithm must be a string'
);
}
if (! \is_string($password)) {
throw new \InvalidArgumentException(
'pbkdf2(): password must be a string'
);
}
if (! \is_string($salt)) {
throw new \InvalidArgumentException(
'pbkdf2(): salt must be a string'
);
}
// Coerce strings to integers with no information loss or overflow
$count += 0;
$key_length += 0;
$algorithm = \strtolower($algorithm);
if (! \in_array($algorithm, \hash_algos(), true)) {
throw new Ex\EnvironmentIsBrokenException(
'Invalid or unsupported hash algorithm.'
);
}
// Whitelist, or we could end up with people using CRC32.
$ok_algorithms = [
'sha1', 'sha224', 'sha256', 'sha384', 'sha512',
'ripemd160', 'ripemd256', 'ripemd320', 'whirlpool',
];
if (! \in_array($algorithm, $ok_algorithms, true)) {
throw new Ex\EnvironmentIsBrokenException(
'Algorithm is not a secure cryptographic hash function.'
);
}
if ($count <= 0 || $key_length <= 0) {
throw new Ex\EnvironmentIsBrokenException(
'Invalid PBKDF2 parameters.'
);
}
if (\function_exists('hash_pbkdf2')) {
// The output length is in NIBBLES (4-bits) if $raw_output is false!
if (! $raw_output) {
$key_length = $key_length * 2;
}
return \hash_pbkdf2($algorithm, $password, $salt, $count, $key_length, $raw_output);
}
$hash_length = Core::ourStrlen(\hash($algorithm, '', true));
$block_count = \ceil($key_length / $hash_length);
$output = '';
for ($i = 1; $i <= $block_count; $i++) {
// $i encoded as 4 bytes, big endian.
$last = $salt . \pack('N', $i);
// first iteration
$last = $xorsum = \hash_hmac($algorithm, $last, $password, true);
// perform the other $count - 1 iterations
for ($j = 1; $j < $count; $j++) {
$xorsum ^= ($last = \hash_hmac($algorithm, $last, $password, true));
}
$output .= $xorsum;
}
if ($raw_output) {
return (string) Core::ourSubstr($output, 0, $key_length);
} else {
return Encoding::binToHex((string) Core::ourSubstr($output, 0, $key_length));
}
}
}

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vendor/defuse/php-encryption/src/Crypto.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
class Crypto
{
/**
* Encrypts a string with a Key.
*
* @param string $plaintext
* @param Key $key
* @param bool $raw_binary
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function encrypt($plaintext, Key $key, $raw_binary = false)
{
return self::encryptInternal(
$plaintext,
KeyOrPassword::createFromKey($key),
$raw_binary
);
}
/**
* Encrypts a string with a password, using a slow key derivation function
* to make password cracking more expensive.
*
* @param string $plaintext
* @param string $password
* @param bool $raw_binary
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function encryptWithPassword($plaintext, $password, $raw_binary = false)
{
return self::encryptInternal(
$plaintext,
KeyOrPassword::createFromPassword($password),
$raw_binary
);
}
/**
* Decrypts a ciphertext to a string with a Key.
*
* @param string $ciphertext
* @param Key $key
* @param bool $raw_binary
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*
* @return string
*/
public static function decrypt($ciphertext, Key $key, $raw_binary = false)
{
return self::decryptInternal(
$ciphertext,
KeyOrPassword::createFromKey($key),
$raw_binary
);
}
/**
* Decrypts a ciphertext to a string with a password, using a slow key
* derivation function to make password cracking more expensive.
*
* @param string $ciphertext
* @param string $password
* @param bool $raw_binary
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*
* @return string
*/
public static function decryptWithPassword($ciphertext, $password, $raw_binary = false)
{
return self::decryptInternal(
$ciphertext,
KeyOrPassword::createFromPassword($password),
$raw_binary
);
}
/**
* Decrypts a legacy ciphertext produced by version 1 of this library.
*
* @param string $ciphertext
* @param string $key
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*
* @return string
*/
public static function legacyDecrypt($ciphertext, $key)
{
RuntimeTests::runtimeTest();
// Extract the HMAC from the front of the ciphertext.
if (Core::ourStrlen($ciphertext) <= Core::LEGACY_MAC_BYTE_SIZE) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Ciphertext is too short.'
);
}
/**
* @var string
*/
$hmac = Core::ourSubstr($ciphertext, 0, Core::LEGACY_MAC_BYTE_SIZE);
if (!\is_string($hmac)) {
throw new Ex\EnvironmentIsBrokenException();
}
/**
* @var string
*/
$ciphertext = Core::ourSubstr($ciphertext, Core::LEGACY_MAC_BYTE_SIZE);
if (!\is_string($ciphertext)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Regenerate the same authentication sub-key.
$akey = Core::HKDF(
Core::LEGACY_HASH_FUNCTION_NAME,
$key,
Core::LEGACY_KEY_BYTE_SIZE,
Core::LEGACY_AUTHENTICATION_INFO_STRING,
null
);
if (self::verifyHMAC($hmac, $ciphertext, $akey)) {
// Regenerate the same encryption sub-key.
$ekey = Core::HKDF(
Core::LEGACY_HASH_FUNCTION_NAME,
$key,
Core::LEGACY_KEY_BYTE_SIZE,
Core::LEGACY_ENCRYPTION_INFO_STRING,
null
);
// Extract the IV from the ciphertext.
if (Core::ourStrlen($ciphertext) <= Core::LEGACY_BLOCK_BYTE_SIZE) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Ciphertext is too short.'
);
}
/**
* @var string
*/
$iv = Core::ourSubstr($ciphertext, 0, Core::LEGACY_BLOCK_BYTE_SIZE);
if (!\is_string($iv)) {
throw new Ex\EnvironmentIsBrokenException();
}
/**
* @var string
*/
$actualCiphertext = Core::ourSubstr($ciphertext, Core::LEGACY_BLOCK_BYTE_SIZE);
if (!\is_string($actualCiphertext)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Do the decryption.
$plaintext = self::plainDecrypt($actualCiphertext, $ekey, $iv, Core::LEGACY_CIPHER_METHOD);
return $plaintext;
} else {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Integrity check failed.'
);
}
}
/**
* Encrypts a string with either a key or a password.
*
* @param string $plaintext
* @param KeyOrPassword $secret
* @param bool $raw_binary
*
* @return string
*/
private static function encryptInternal($plaintext, KeyOrPassword $secret, $raw_binary)
{
RuntimeTests::runtimeTest();
$salt = Core::secureRandom(Core::SALT_BYTE_SIZE);
$keys = $secret->deriveKeys($salt);
$ekey = $keys->getEncryptionKey();
$akey = $keys->getAuthenticationKey();
$iv = Core::secureRandom(Core::BLOCK_BYTE_SIZE);
$ciphertext = Core::CURRENT_VERSION . $salt . $iv . self::plainEncrypt($plaintext, $ekey, $iv);
$auth = \hash_hmac(Core::HASH_FUNCTION_NAME, $ciphertext, $akey, true);
$ciphertext = $ciphertext . $auth;
if ($raw_binary) {
return $ciphertext;
}
return Encoding::binToHex($ciphertext);
}
/**
* Decrypts a ciphertext to a string with either a key or a password.
*
* @param string $ciphertext
* @param KeyOrPassword $secret
* @param bool $raw_binary
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*
* @return string
*/
private static function decryptInternal($ciphertext, KeyOrPassword $secret, $raw_binary)
{
RuntimeTests::runtimeTest();
if (! $raw_binary) {
try {
$ciphertext = Encoding::hexToBin($ciphertext);
} catch (Ex\BadFormatException $ex) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Ciphertext has invalid hex encoding.'
);
}
}
if (Core::ourStrlen($ciphertext) < Core::MINIMUM_CIPHERTEXT_SIZE) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Ciphertext is too short.'
);
}
// Get and check the version header.
/** @var string $header */
$header = Core::ourSubstr($ciphertext, 0, Core::HEADER_VERSION_SIZE);
if ($header !== Core::CURRENT_VERSION) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Bad version header.'
);
}
// Get the salt.
/** @var string $salt */
$salt = Core::ourSubstr(
$ciphertext,
Core::HEADER_VERSION_SIZE,
Core::SALT_BYTE_SIZE
);
if (!\is_string($salt)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Get the IV.
/** @var string $iv */
$iv = Core::ourSubstr(
$ciphertext,
Core::HEADER_VERSION_SIZE + Core::SALT_BYTE_SIZE,
Core::BLOCK_BYTE_SIZE
);
if (!\is_string($iv)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Get the HMAC.
/** @var string $hmac */
$hmac = Core::ourSubstr(
$ciphertext,
Core::ourStrlen($ciphertext) - Core::MAC_BYTE_SIZE,
Core::MAC_BYTE_SIZE
);
if (!\is_string($hmac)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Get the actual encrypted ciphertext.
/** @var string $encrypted */
$encrypted = Core::ourSubstr(
$ciphertext,
Core::HEADER_VERSION_SIZE + Core::SALT_BYTE_SIZE +
Core::BLOCK_BYTE_SIZE,
Core::ourStrlen($ciphertext) - Core::MAC_BYTE_SIZE - Core::SALT_BYTE_SIZE -
Core::BLOCK_BYTE_SIZE - Core::HEADER_VERSION_SIZE
);
if (!\is_string($encrypted)) {
throw new Ex\EnvironmentIsBrokenException();
}
// Derive the separate encryption and authentication keys from the key
// or password, whichever it is.
$keys = $secret->deriveKeys($salt);
if (self::verifyHMAC($hmac, $header . $salt . $iv . $encrypted, $keys->getAuthenticationKey())) {
$plaintext = self::plainDecrypt($encrypted, $keys->getEncryptionKey(), $iv, Core::CIPHER_METHOD);
return $plaintext;
} else {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Integrity check failed.'
);
}
}
/**
* Raw unauthenticated encryption (insecure on its own).
*
* @param string $plaintext
* @param string $key
* @param string $iv
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
protected static function plainEncrypt($plaintext, $key, $iv)
{
Core::ensureConstantExists('OPENSSL_RAW_DATA');
Core::ensureFunctionExists('openssl_encrypt');
/** @var string $ciphertext */
$ciphertext = \openssl_encrypt(
$plaintext,
Core::CIPHER_METHOD,
$key,
OPENSSL_RAW_DATA,
$iv
);
if (!\is_string($ciphertext)) {
throw new Ex\EnvironmentIsBrokenException(
'openssl_encrypt() failed.'
);
}
return $ciphertext;
}
/**
* Raw unauthenticated decryption (insecure on its own).
*
* @param string $ciphertext
* @param string $key
* @param string $iv
* @param string $cipherMethod
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
protected static function plainDecrypt($ciphertext, $key, $iv, $cipherMethod)
{
Core::ensureConstantExists('OPENSSL_RAW_DATA');
Core::ensureFunctionExists('openssl_decrypt');
/** @var string $plaintext */
$plaintext = \openssl_decrypt(
$ciphertext,
$cipherMethod,
$key,
OPENSSL_RAW_DATA,
$iv
);
if (!\is_string($plaintext)) {
throw new Ex\EnvironmentIsBrokenException(
'openssl_decrypt() failed.'
);
}
return $plaintext;
}
/**
* Verifies an HMAC without leaking information through side-channels.
*
* @param string $expected_hmac
* @param string $message
* @param string $key
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return bool
*/
protected static function verifyHMAC($expected_hmac, $message, $key)
{
$message_hmac = \hash_hmac(Core::HASH_FUNCTION_NAME, $message, $key, true);
return Core::hashEquals($message_hmac, $expected_hmac);
}
}

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vendor/defuse/php-encryption/src/DerivedKeys.php vendored Normal file
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<?php
namespace Defuse\Crypto;
/**
* Class DerivedKeys
* @package Defuse\Crypto
*/
final class DerivedKeys
{
/**
* @var string
*/
private $akey = '';
/**
* @var string
*/
private $ekey = '';
/**
* Returns the authentication key.
* @return string
*/
public function getAuthenticationKey()
{
return $this->akey;
}
/**
* Returns the encryption key.
* @return string
*/
public function getEncryptionKey()
{
return $this->ekey;
}
/**
* Constructor for DerivedKeys.
*
* @param string $akey
* @param string $ekey
*/
public function __construct($akey, $ekey)
{
$this->akey = $akey;
$this->ekey = $ekey;
}
}

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vendor/defuse/php-encryption/src/Encoding.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class Encoding
{
const CHECKSUM_BYTE_SIZE = 32;
const CHECKSUM_HASH_ALGO = 'sha256';
const SERIALIZE_HEADER_BYTES = 4;
/**
* Converts a byte string to a hexadecimal string without leaking
* information through side channels.
*
* @param string $byte_string
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function binToHex($byte_string)
{
$hex = '';
$len = Core::ourStrlen($byte_string);
for ($i = 0; $i < $len; ++$i) {
$c = \ord($byte_string[$i]) & 0xf;
$b = \ord($byte_string[$i]) >> 4;
$hex .= \pack(
'CC',
87 + $b + ((($b - 10) >> 8) & ~38),
87 + $c + ((($c - 10) >> 8) & ~38)
);
}
return $hex;
}
/**
* Converts a hexadecimal string into a byte string without leaking
* information through side channels.
*
* @param string $hex_string
*
* @throws Ex\BadFormatException
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function hexToBin($hex_string)
{
$hex_pos = 0;
$bin = '';
$hex_len = Core::ourStrlen($hex_string);
$state = 0;
$c_acc = 0;
while ($hex_pos < $hex_len) {
$c = \ord($hex_string[$hex_pos]);
$c_num = $c ^ 48;
$c_num0 = ($c_num - 10) >> 8;
$c_alpha = ($c & ~32) - 55;
$c_alpha0 = (($c_alpha - 10) ^ ($c_alpha - 16)) >> 8;
if (($c_num0 | $c_alpha0) === 0) {
throw new Ex\BadFormatException(
'Encoding::hexToBin() input is not a hex string.'
);
}
$c_val = ($c_num0 & $c_num) | ($c_alpha & $c_alpha0);
if ($state === 0) {
$c_acc = $c_val * 16;
} else {
$bin .= \pack('C', $c_acc | $c_val);
}
$state ^= 1;
++$hex_pos;
}
return $bin;
}
/**
* Remove trialing whitespace without table look-ups or branches.
*
* Calling this function may leak the length of the string as well as the
* number of trailing whitespace characters through side-channels.
*
* @param string $string
* @return string
*/
public static function trimTrailingWhitespace($string = '')
{
$length = Core::ourStrlen($string);
if ($length < 1) {
return '';
}
do {
$prevLength = $length;
$last = $length - 1;
$chr = \ord($string[$last]);
/* Null Byte (0x00), a.k.a. \0 */
// if ($chr === 0x00) $length -= 1;
$sub = (($chr - 1) >> 8 ) & 1;
$length -= $sub;
$last -= $sub;
/* Horizontal Tab (0x09) a.k.a. \t */
$chr = \ord($string[$last]);
// if ($chr === 0x09) $length -= 1;
$sub = (((0x08 - $chr) & ($chr - 0x0a)) >> 8) & 1;
$length -= $sub;
$last -= $sub;
/* New Line (0x0a), a.k.a. \n */
$chr = \ord($string[$last]);
// if ($chr === 0x0a) $length -= 1;
$sub = (((0x09 - $chr) & ($chr - 0x0b)) >> 8) & 1;
$length -= $sub;
$last -= $sub;
/* Carriage Return (0x0D), a.k.a. \r */
$chr = \ord($string[$last]);
// if ($chr === 0x0d) $length -= 1;
$sub = (((0x0c - $chr) & ($chr - 0x0e)) >> 8) & 1;
$length -= $sub;
$last -= $sub;
/* Space */
$chr = \ord($string[$last]);
// if ($chr === 0x20) $length -= 1;
$sub = (((0x1f - $chr) & ($chr - 0x21)) >> 8) & 1;
$length -= $sub;
} while ($prevLength !== $length && $length > 0);
return (string) Core::ourSubstr($string, 0, $length);
}
/*
* SECURITY NOTE ON APPLYING CHECKSUMS TO SECRETS:
*
* The checksum introduces a potential security weakness. For example,
* suppose we apply a checksum to a key, and that an adversary has an
* exploit against the process containing the key, such that they can
* overwrite an arbitrary byte of memory and then cause the checksum to
* be verified and learn the result.
*
* In this scenario, the adversary can extract the key one byte at
* a time by overwriting it with their guess of its value and then
* asking if the checksum matches. If it does, their guess was right.
* This kind of attack may be more easy to implement and more reliable
* than a remote code execution attack.
*
* This attack also applies to authenticated encryption as a whole, in
* the situation where the adversary can overwrite a byte of the key
* and then cause a valid ciphertext to be decrypted, and then
* determine whether the MAC check passed or failed.
*
* By using the full SHA256 hash instead of truncating it, I'm ensuring
* that both ways of going about the attack are equivalently difficult.
* A shorter checksum of say 32 bits might be more useful to the
* adversary as an oracle in case their writes are coarser grained.
*
* Because the scenario assumes a serious vulnerability, we don't try
* to prevent attacks of this style.
*/
/**
* INTERNAL USE ONLY: Applies a version header, applies a checksum, and
* then encodes a byte string into a range of printable ASCII characters.
*
* @param string $header
* @param string $bytes
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function saveBytesToChecksummedAsciiSafeString($header, $bytes)
{
// Headers must be a constant length to prevent one type's header from
// being a prefix of another type's header, leading to ambiguity.
if (Core::ourStrlen($header) !== self::SERIALIZE_HEADER_BYTES) {
throw new Ex\EnvironmentIsBrokenException(
'Header must be ' . self::SERIALIZE_HEADER_BYTES . ' bytes.'
);
}
return Encoding::binToHex(
$header .
$bytes .
\hash(
self::CHECKSUM_HASH_ALGO,
$header . $bytes,
true
)
);
}
/**
* INTERNAL USE ONLY: Decodes, verifies the header and checksum, and returns
* the encoded byte string.
*
* @param string $expected_header
* @param string $string
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\BadFormatException
*
* @return string
*/
public static function loadBytesFromChecksummedAsciiSafeString($expected_header, $string)
{
// Headers must be a constant length to prevent one type's header from
// being a prefix of another type's header, leading to ambiguity.
if (Core::ourStrlen($expected_header) !== self::SERIALIZE_HEADER_BYTES) {
throw new Ex\EnvironmentIsBrokenException(
'Header must be 4 bytes.'
);
}
/* If you get an exception here when attempting to load from a file, first pass your
key to Encoding::trimTrailingWhitespace() to remove newline characters, etc. */
$bytes = Encoding::hexToBin($string);
/* Make sure we have enough bytes to get the version header and checksum. */
if (Core::ourStrlen($bytes) < self::SERIALIZE_HEADER_BYTES + self::CHECKSUM_BYTE_SIZE) {
throw new Ex\BadFormatException(
'Encoded data is shorter than expected.'
);
}
/* Grab the version header. */
$actual_header = (string) Core::ourSubstr($bytes, 0, self::SERIALIZE_HEADER_BYTES);
if ($actual_header !== $expected_header) {
throw new Ex\BadFormatException(
'Invalid header.'
);
}
/* Grab the bytes that are part of the checksum. */
$checked_bytes = (string) Core::ourSubstr(
$bytes,
0,
Core::ourStrlen($bytes) - self::CHECKSUM_BYTE_SIZE
);
/* Grab the included checksum. */
$checksum_a = (string) Core::ourSubstr(
$bytes,
Core::ourStrlen($bytes) - self::CHECKSUM_BYTE_SIZE,
self::CHECKSUM_BYTE_SIZE
);
/* Re-compute the checksum. */
$checksum_b = \hash(self::CHECKSUM_HASH_ALGO, $checked_bytes, true);
/* Check if the checksum matches. */
if (! Core::hashEquals($checksum_a, $checksum_b)) {
throw new Ex\BadFormatException(
"Data is corrupted, the checksum doesn't match"
);
}
return (string) Core::ourSubstr(
$bytes,
self::SERIALIZE_HEADER_BYTES,
Core::ourStrlen($bytes) - self::SERIALIZE_HEADER_BYTES - self::CHECKSUM_BYTE_SIZE
);
}
}

7
vendor/defuse/php-encryption/src/Exception/BadFormatException.php vendored Normal file
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@ -0,0 +1,7 @@
<?php
namespace Defuse\Crypto\Exception;
class BadFormatException extends \Defuse\Crypto\Exception\CryptoException
{
}

7
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<?php
namespace Defuse\Crypto\Exception;
class CryptoException extends \Exception
{
}

7
vendor/defuse/php-encryption/src/Exception/EnvironmentIsBrokenException.php vendored Normal file
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<?php
namespace Defuse\Crypto\Exception;
class EnvironmentIsBrokenException extends \Defuse\Crypto\Exception\CryptoException
{
}

7
vendor/defuse/php-encryption/src/Exception/IOException.php vendored Normal file
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@ -0,0 +1,7 @@
<?php
namespace Defuse\Crypto\Exception;
class IOException extends \Defuse\Crypto\Exception\CryptoException
{
}

7
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<?php
namespace Defuse\Crypto\Exception;
class WrongKeyOrModifiedCiphertextException extends \Defuse\Crypto\Exception\CryptoException
{
}

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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class File
{
/**
* Encrypts the input file, saving the ciphertext to the output file.
*
* @param string $inputFilename
* @param string $outputFilename
* @param Key $key
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
*/
public static function encryptFile($inputFilename, $outputFilename, Key $key)
{
self::encryptFileInternal(
$inputFilename,
$outputFilename,
KeyOrPassword::createFromKey($key)
);
}
/**
* Encrypts a file with a password, using a slow key derivation function to
* make password cracking more expensive.
*
* @param string $inputFilename
* @param string $outputFilename
* @param string $password
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
*/
public static function encryptFileWithPassword($inputFilename, $outputFilename, $password)
{
self::encryptFileInternal(
$inputFilename,
$outputFilename,
KeyOrPassword::createFromPassword($password)
);
}
/**
* Decrypts the input file, saving the plaintext to the output file.
*
* @param string $inputFilename
* @param string $outputFilename
* @param Key $key
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function decryptFile($inputFilename, $outputFilename, Key $key)
{
self::decryptFileInternal(
$inputFilename,
$outputFilename,
KeyOrPassword::createFromKey($key)
);
}
/**
* Decrypts a file with a password, using a slow key derivation function to
* make password cracking more expensive.
*
* @param string $inputFilename
* @param string $outputFilename
* @param string $password
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function decryptFileWithPassword($inputFilename, $outputFilename, $password)
{
self::decryptFileInternal(
$inputFilename,
$outputFilename,
KeyOrPassword::createFromPassword($password)
);
}
/**
* Takes two resource handles and encrypts the contents of the first,
* writing the ciphertext into the second.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param Key $key
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function encryptResource($inputHandle, $outputHandle, Key $key)
{
self::encryptResourceInternal(
$inputHandle,
$outputHandle,
KeyOrPassword::createFromKey($key)
);
}
/**
* Encrypts the contents of one resource handle into another with a
* password, using a slow key derivation function to make password cracking
* more expensive.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param string $password
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function encryptResourceWithPassword($inputHandle, $outputHandle, $password)
{
self::encryptResourceInternal(
$inputHandle,
$outputHandle,
KeyOrPassword::createFromPassword($password)
);
}
/**
* Takes two resource handles and decrypts the contents of the first,
* writing the plaintext into the second.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param Key $key
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function decryptResource($inputHandle, $outputHandle, Key $key)
{
self::decryptResourceInternal(
$inputHandle,
$outputHandle,
KeyOrPassword::createFromKey($key)
);
}
/**
* Decrypts the contents of one resource into another with a password, using
* a slow key derivation function to make password cracking more expensive.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param string $password
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function decryptResourceWithPassword($inputHandle, $outputHandle, $password)
{
self::decryptResourceInternal(
$inputHandle,
$outputHandle,
KeyOrPassword::createFromPassword($password)
);
}
/**
* Encrypts a file with either a key or a password.
*
* @param string $inputFilename
* @param string $outputFilename
* @param KeyOrPassword $secret
* @return void
*
* @throws Ex\CryptoException
* @throws Ex\IOException
*/
private static function encryptFileInternal($inputFilename, $outputFilename, KeyOrPassword $secret)
{
/* Open the input file. */
$if = @\fopen($inputFilename, 'rb');
if ($if === false) {
throw new Ex\IOException(
'Cannot open input file for encrypting: ' .
self::getLastErrorMessage()
);
}
if (\is_callable('\\stream_set_read_buffer')) {
/* This call can fail, but the only consequence is performance. */
\stream_set_read_buffer($if, 0);
}
/* Open the output file. */
$of = @\fopen($outputFilename, 'wb');
if ($of === false) {
\fclose($if);
throw new Ex\IOException(
'Cannot open output file for encrypting: ' .
self::getLastErrorMessage()
);
}
if (\is_callable('\\stream_set_write_buffer')) {
/* This call can fail, but the only consequence is performance. */
\stream_set_write_buffer($of, 0);
}
/* Perform the encryption. */
try {
self::encryptResourceInternal($if, $of, $secret);
} catch (Ex\CryptoException $ex) {
\fclose($if);
\fclose($of);
throw $ex;
}
/* Close the input file. */
if (\fclose($if) === false) {
\fclose($of);
throw new Ex\IOException(
'Cannot close input file after encrypting'
);
}
/* Close the output file. */
if (\fclose($of) === false) {
throw new Ex\IOException(
'Cannot close output file after encrypting'
);
}
}
/**
* Decrypts a file with either a key or a password.
*
* @param string $inputFilename
* @param string $outputFilename
* @param KeyOrPassword $secret
* @return void
*
* @throws Ex\CryptoException
* @throws Ex\IOException
*/
private static function decryptFileInternal($inputFilename, $outputFilename, KeyOrPassword $secret)
{
/* Open the input file. */
$if = @\fopen($inputFilename, 'rb');
if ($if === false) {
throw new Ex\IOException(
'Cannot open input file for decrypting: ' .
self::getLastErrorMessage()
);
}
if (\is_callable('\\stream_set_read_buffer')) {
/* This call can fail, but the only consequence is performance. */
\stream_set_read_buffer($if, 0);
}
/* Open the output file. */
$of = @\fopen($outputFilename, 'wb');
if ($of === false) {
\fclose($if);
throw new Ex\IOException(
'Cannot open output file for decrypting: ' .
self::getLastErrorMessage()
);
}
if (\is_callable('\\stream_set_write_buffer')) {
/* This call can fail, but the only consequence is performance. */
\stream_set_write_buffer($of, 0);
}
/* Perform the decryption. */
try {
self::decryptResourceInternal($if, $of, $secret);
} catch (Ex\CryptoException $ex) {
\fclose($if);
\fclose($of);
throw $ex;
}
/* Close the input file. */
if (\fclose($if) === false) {
\fclose($of);
throw new Ex\IOException(
'Cannot close input file after decrypting'
);
}
/* Close the output file. */
if (\fclose($of) === false) {
throw new Ex\IOException(
'Cannot close output file after decrypting'
);
}
}
/**
* Encrypts a resource with either a key or a password.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param KeyOrPassword $secret
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
*/
private static function encryptResourceInternal($inputHandle, $outputHandle, KeyOrPassword $secret)
{
if (! \is_resource($inputHandle)) {
throw new Ex\IOException(
'Input handle must be a resource!'
);
}
if (! \is_resource($outputHandle)) {
throw new Ex\IOException(
'Output handle must be a resource!'
);
}
$inputStat = \fstat($inputHandle);
$inputSize = $inputStat['size'];
$file_salt = Core::secureRandom(Core::SALT_BYTE_SIZE);
$keys = $secret->deriveKeys($file_salt);
$ekey = $keys->getEncryptionKey();
$akey = $keys->getAuthenticationKey();
$ivsize = Core::BLOCK_BYTE_SIZE;
$iv = Core::secureRandom($ivsize);
/* Initialize a streaming HMAC state. */
/** @var resource $hmac */
$hmac = \hash_init(Core::HASH_FUNCTION_NAME, HASH_HMAC, $akey);
if (!\is_resource($hmac)) {
throw new Ex\EnvironmentIsBrokenException(
'Cannot initialize a hash context'
);
}
/* Write the header, salt, and IV. */
self::writeBytes(
$outputHandle,
Core::CURRENT_VERSION . $file_salt . $iv,
Core::HEADER_VERSION_SIZE + Core::SALT_BYTE_SIZE + $ivsize
);
/* Add the header, salt, and IV to the HMAC. */
\hash_update($hmac, Core::CURRENT_VERSION);
\hash_update($hmac, $file_salt);
\hash_update($hmac, $iv);
/* $thisIv will be incremented after each call to the encryption. */
$thisIv = $iv;
/* How many blocks do we encrypt at a time? We increment by this value. */
$inc = (int) (Core::BUFFER_BYTE_SIZE / Core::BLOCK_BYTE_SIZE);
/* Loop until we reach the end of the input file. */
$at_file_end = false;
while (! (\feof($inputHandle) || $at_file_end)) {
/* Find out if we can read a full buffer, or only a partial one. */
/** @var int */
$pos = \ftell($inputHandle);
if (!\is_int($pos)) {
throw new Ex\IOException(
'Could not get current position in input file during encryption'
);
}
if ($pos + Core::BUFFER_BYTE_SIZE >= $inputSize) {
/* We're at the end of the file, so we need to break out of the loop. */
$at_file_end = true;
$read = self::readBytes(
$inputHandle,
$inputSize - $pos
);
} else {
$read = self::readBytes(
$inputHandle,
Core::BUFFER_BYTE_SIZE
);
}
/* Encrypt this buffer. */
/** @var string */
$encrypted = \openssl_encrypt(
$read,
Core::CIPHER_METHOD,
$ekey,
OPENSSL_RAW_DATA,
$thisIv
);
if (!\is_string($encrypted)) {
throw new Ex\EnvironmentIsBrokenException(
'OpenSSL encryption error'
);
}
/* Write this buffer's ciphertext. */
self::writeBytes($outputHandle, $encrypted, Core::ourStrlen($encrypted));
/* Add this buffer's ciphertext to the HMAC. */
\hash_update($hmac, $encrypted);
/* Increment the counter by the number of blocks in a buffer. */
$thisIv = Core::incrementCounter($thisIv, $inc);
/* WARNING: Usually, unless the file is a multiple of the buffer
* size, $thisIv will contain an incorrect value here on the last
* iteration of this loop. */
}
/* Get the HMAC and append it to the ciphertext. */
$final_mac = \hash_final($hmac, true);
self::writeBytes($outputHandle, $final_mac, Core::MAC_BYTE_SIZE);
}
/**
* Decrypts a file-backed resource with either a key or a password.
*
* @param resource $inputHandle
* @param resource $outputHandle
* @param KeyOrPassword $secret
* @return void
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\IOException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*/
public static function decryptResourceInternal($inputHandle, $outputHandle, KeyOrPassword $secret)
{
if (! \is_resource($inputHandle)) {
throw new Ex\IOException(
'Input handle must be a resource!'
);
}
if (! \is_resource($outputHandle)) {
throw new Ex\IOException(
'Output handle must be a resource!'
);
}
/* Make sure the file is big enough for all the reads we need to do. */
$stat = \fstat($inputHandle);
if ($stat['size'] < Core::MINIMUM_CIPHERTEXT_SIZE) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Input file is too small to have been created by this library.'
);
}
/* Check the version header. */
$header = self::readBytes($inputHandle, Core::HEADER_VERSION_SIZE);
if ($header !== Core::CURRENT_VERSION) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Bad version header.'
);
}
/* Get the salt. */
$file_salt = self::readBytes($inputHandle, Core::SALT_BYTE_SIZE);
/* Get the IV. */
$ivsize = Core::BLOCK_BYTE_SIZE;
$iv = self::readBytes($inputHandle, $ivsize);
/* Derive the authentication and encryption keys. */
$keys = $secret->deriveKeys($file_salt);
$ekey = $keys->getEncryptionKey();
$akey = $keys->getAuthenticationKey();
/* We'll store the MAC of each buffer-sized chunk as we verify the
* actual MAC, so that we can check them again when decrypting. */
$macs = [];
/* $thisIv will be incremented after each call to the decryption. */
$thisIv = $iv;
/* How many blocks do we encrypt at a time? We increment by this value. */
$inc = (int) (Core::BUFFER_BYTE_SIZE / Core::BLOCK_BYTE_SIZE);
/* Get the HMAC. */
if (\fseek($inputHandle, (-1 * Core::MAC_BYTE_SIZE), SEEK_END) === false) {
throw new Ex\IOException(
'Cannot seek to beginning of MAC within input file'
);
}
/* Get the position of the last byte in the actual ciphertext. */
/** @var int $cipher_end */
$cipher_end = \ftell($inputHandle);
if (!\is_int($cipher_end)) {
throw new Ex\IOException(
'Cannot read input file'
);
}
/* We have the position of the first byte of the HMAC. Go back by one. */
--$cipher_end;
/* Read the HMAC. */
/** @var string $stored_mac */
$stored_mac = self::readBytes($inputHandle, Core::MAC_BYTE_SIZE);
/* Initialize a streaming HMAC state. */
/** @var resource $hmac */
$hmac = \hash_init(Core::HASH_FUNCTION_NAME, HASH_HMAC, $akey);
if (!\is_resource($hmac)) {
throw new Ex\EnvironmentIsBrokenException(
'Cannot initialize a hash context'
);
}
/* Reset file pointer to the beginning of the file after the header */
if (\fseek($inputHandle, Core::HEADER_VERSION_SIZE, SEEK_SET) === false) {
throw new Ex\IOException(
'Cannot read seek within input file'
);
}
/* Seek to the start of the actual ciphertext. */
if (\fseek($inputHandle, Core::SALT_BYTE_SIZE + $ivsize, SEEK_CUR) === false) {
throw new Ex\IOException(
'Cannot seek input file to beginning of ciphertext'
);
}
/* PASS #1: Calculating the HMAC. */
\hash_update($hmac, $header);
\hash_update($hmac, $file_salt);
\hash_update($hmac, $iv);
/** @var resource $hmac2 */
$hmac2 = \hash_copy($hmac);
$break = false;
while (! $break) {
/** @var int $pos */
$pos = \ftell($inputHandle);
if (!\is_int($pos)) {
throw new Ex\IOException(
'Could not get current position in input file during decryption'
);
}
/* Read the next buffer-sized chunk (or less). */
if ($pos + Core::BUFFER_BYTE_SIZE >= $cipher_end) {
$break = true;
$read = self::readBytes(
$inputHandle,
$cipher_end - $pos + 1
);
} else {
$read = self::readBytes(
$inputHandle,
Core::BUFFER_BYTE_SIZE
);
}
/* Update the HMAC. */
\hash_update($hmac, $read);
/* Remember this buffer-sized chunk's HMAC. */
/** @var resource $chunk_mac */
$chunk_mac = \hash_copy($hmac);
if (!\is_resource($chunk_mac)) {
throw new Ex\EnvironmentIsBrokenException(
'Cannot duplicate a hash context'
);
}
$macs []= \hash_final($chunk_mac);
}
/* Get the final HMAC, which should match the stored one. */
/** @var string $final_mac */
$final_mac = \hash_final($hmac, true);
/* Verify the HMAC. */
if (! Core::hashEquals($final_mac, $stored_mac)) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'Integrity check failed.'
);
}
/* PASS #2: Decrypt and write output. */
/* Rewind to the start of the actual ciphertext. */
if (\fseek($inputHandle, Core::SALT_BYTE_SIZE + $ivsize + Core::HEADER_VERSION_SIZE, SEEK_SET) === false) {
throw new Ex\IOException(
'Could not move the input file pointer during decryption'
);
}
$at_file_end = false;
while (! $at_file_end) {
/** @var int $pos */
$pos = \ftell($inputHandle);
if (!\is_int($pos)) {
throw new Ex\IOException(
'Could not get current position in input file during decryption'
);
}
/* Read the next buffer-sized chunk (or less). */
if ($pos + Core::BUFFER_BYTE_SIZE >= $cipher_end) {
$at_file_end = true;
$read = self::readBytes(
$inputHandle,
$cipher_end - $pos + 1
);
} else {
$read = self::readBytes(
$inputHandle,
Core::BUFFER_BYTE_SIZE
);
}
/* Recalculate the MAC (so far) and compare it with the one we
* remembered from pass #1 to ensure attackers didn't change the
* ciphertext after MAC verification. */
\hash_update($hmac2, $read);
/** @var resource $calc_mac */
$calc_mac = \hash_copy($hmac2);
if (!\is_resource($calc_mac)) {
throw new Ex\EnvironmentIsBrokenException(
'Cannot duplicate a hash context'
);
}
$calc = \hash_final($calc_mac);
if (empty($macs)) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'File was modified after MAC verification'
);
} elseif (! Core::hashEquals(\array_shift($macs), $calc)) {
throw new Ex\WrongKeyOrModifiedCiphertextException(
'File was modified after MAC verification'
);
}
/* Decrypt this buffer-sized chunk. */
/** @var string $decrypted */
$decrypted = \openssl_decrypt(
$read,
Core::CIPHER_METHOD,
$ekey,
OPENSSL_RAW_DATA,
$thisIv
);
if (!\is_string($decrypted)) {
throw new Ex\EnvironmentIsBrokenException(
'OpenSSL decryption error'
);
}
/* Write the plaintext to the output file. */
self::writeBytes(
$outputHandle,
$decrypted,
Core::ourStrlen($decrypted)
);
/* Increment the IV by the amount of blocks in a buffer. */
/** @var string $thisIv */
$thisIv = Core::incrementCounter($thisIv, $inc);
/* WARNING: Usually, unless the file is a multiple of the buffer
* size, $thisIv will contain an incorrect value here on the last
* iteration of this loop. */
}
}
/**
* Read from a stream; prevent partial reads.
*
* @param resource $stream
* @param int $num_bytes
* @return string
*
* @throws Ex\IOException
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public static function readBytes($stream, $num_bytes)
{
if ($num_bytes < 0) {
throw new Ex\EnvironmentIsBrokenException(
'Tried to read less than 0 bytes'
);
} elseif ($num_bytes === 0) {
return '';
}
$buf = '';
$remaining = $num_bytes;
while ($remaining > 0 && ! \feof($stream)) {
/** @var string $read */
$read = \fread($stream, $remaining);
if (!\is_string($read)) {
throw new Ex\IOException(
'Could not read from the file'
);
}
$buf .= $read;
$remaining -= Core::ourStrlen($read);
}
if (Core::ourStrlen($buf) !== $num_bytes) {
throw new Ex\IOException(
'Tried to read past the end of the file'
);
}
return $buf;
}
/**
* Write to a stream; prevents partial writes.
*
* @param resource $stream
* @param string $buf
* @param int $num_bytes
* @return int
*
* @throws Ex\IOException
*
* @return string
*/
public static function writeBytes($stream, $buf, $num_bytes = null)
{
$bufSize = Core::ourStrlen($buf);
if ($num_bytes === null) {
$num_bytes = $bufSize;
}
if ($num_bytes > $bufSize) {
throw new Ex\IOException(
'Trying to write more bytes than the buffer contains.'
);
}
if ($num_bytes < 0) {
throw new Ex\IOException(
'Tried to write less than 0 bytes'
);
}
$remaining = $num_bytes;
while ($remaining > 0) {
/** @var int $written */
$written = \fwrite($stream, $buf, $remaining);
if (!\is_int($written)) {
throw new Ex\IOException(
'Could not write to the file'
);
}
$buf = (string) Core::ourSubstr($buf, $written, null);
$remaining -= $written;
}
return $num_bytes;
}
/**
* Returns the last PHP error's or warning's message string.
*
* @return string
*/
private static function getLastErrorMessage()
{
$error = error_get_last();
if ($error === null) {
return '[no PHP error]';
} else {
return $error['message'];
}
}
}

95
vendor/defuse/php-encryption/src/Key.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class Key
{
const KEY_CURRENT_VERSION = "\xDE\xF0\x00\x00";
const KEY_BYTE_SIZE = 32;
/**
* @var string
*/
private $key_bytes;
/**
* Creates new random key.
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return Key
*/
public static function createNewRandomKey()
{
return new Key(Core::secureRandom(self::KEY_BYTE_SIZE));
}
/**
* Loads a Key from its encoded form.
*
* By default, this function will call Encoding::trimTrailingWhitespace()
* to remove trailing CR, LF, NUL, TAB, and SPACE characters, which are
* commonly appended to files when working with text editors.
*
* @param string $saved_key_string
* @param bool $do_not_trim (default: false)
*
* @throws Ex\BadFormatException
* @throws Ex\EnvironmentIsBrokenException
*
* @return Key
*/
public static function loadFromAsciiSafeString($saved_key_string, $do_not_trim = false)
{
if (!$do_not_trim) {
$saved_key_string = Encoding::trimTrailingWhitespace($saved_key_string);
}
$key_bytes = Encoding::loadBytesFromChecksummedAsciiSafeString(self::KEY_CURRENT_VERSION, $saved_key_string);
return new Key($key_bytes);
}
/**
* Encodes the Key into a string of printable ASCII characters.
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public function saveToAsciiSafeString()
{
return Encoding::saveBytesToChecksummedAsciiSafeString(
self::KEY_CURRENT_VERSION,
$this->key_bytes
);
}
/**
* Gets the raw bytes of the key.
*
* @return string
*/
public function getRawBytes()
{
return $this->key_bytes;
}
/**
* Constructs a new Key object from a string of raw bytes.
*
* @param string $bytes
*
* @throws Ex\EnvironmentIsBrokenException
*/
private function __construct($bytes)
{
if (Core::ourStrlen($bytes) !== self::KEY_BYTE_SIZE) {
throw new Ex\EnvironmentIsBrokenException(
'Bad key length.'
);
}
$this->key_bytes = $bytes;
}
}

133
vendor/defuse/php-encryption/src/KeyOrPassword.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class KeyOrPassword
{
const PBKDF2_ITERATIONS = 100000;
const SECRET_TYPE_KEY = 1;
const SECRET_TYPE_PASSWORD = 2;
/**
* @var int
*/
private $secret_type = 0;
/**
* @var Key|string
*/
private $secret;
/**
* Initializes an instance of KeyOrPassword from a key.
*
* @param Key $key
*
* @return KeyOrPassword
*/
public static function createFromKey(Key $key)
{
return new KeyOrPassword(self::SECRET_TYPE_KEY, $key);
}
/**
* Initializes an instance of KeyOrPassword from a password.
*
* @param string $password
*
* @return KeyOrPassword
*/
public static function createFromPassword($password)
{
return new KeyOrPassword(self::SECRET_TYPE_PASSWORD, $password);
}
/**
* Derives authentication and encryption keys from the secret, using a slow
* key derivation function if the secret is a password.
*
* @param string $salt
*
* @throws Ex\CryptoException
* @throws Ex\EnvironmentIsBrokenException
*
* @return DerivedKeys
*/
public function deriveKeys($salt)
{
if (Core::ourStrlen($salt) !== Core::SALT_BYTE_SIZE) {
throw new Ex\EnvironmentIsBrokenException('Bad salt.');
}
if ($this->secret_type === self::SECRET_TYPE_KEY) {
if (!($this->secret instanceof Key)) {
throw new Ex\CryptoException('Expected a Key object');
}
$akey = Core::HKDF(
Core::HASH_FUNCTION_NAME,
$this->secret->getRawBytes(),
Core::KEY_BYTE_SIZE,
Core::AUTHENTICATION_INFO_STRING,
$salt
);
$ekey = Core::HKDF(
Core::HASH_FUNCTION_NAME,
$this->secret->getRawBytes(),
Core::KEY_BYTE_SIZE,
Core::ENCRYPTION_INFO_STRING,
$salt
);
return new DerivedKeys($akey, $ekey);
} elseif ($this->secret_type === self::SECRET_TYPE_PASSWORD) {
if (!\is_string($this->secret)) {
throw new Ex\CryptoException('Expected a string');
}
/* Our PBKDF2 polyfill is vulnerable to a DoS attack documented in
* GitHub issue #230. The fix is to pre-hash the password to ensure
* it is short. We do the prehashing here instead of in pbkdf2() so
* that pbkdf2() still computes the function as defined by the
* standard. */
$prehash = \hash(Core::HASH_FUNCTION_NAME, $this->secret, true);
$prekey = Core::pbkdf2(
Core::HASH_FUNCTION_NAME,
$prehash,
$salt,
self::PBKDF2_ITERATIONS,
Core::KEY_BYTE_SIZE,
true
);
$akey = Core::HKDF(
Core::HASH_FUNCTION_NAME,
$prekey,
Core::KEY_BYTE_SIZE,
Core::AUTHENTICATION_INFO_STRING,
$salt
);
/* Note the cryptographic re-use of $salt here. */
$ekey = Core::HKDF(
Core::HASH_FUNCTION_NAME,
$prekey,
Core::KEY_BYTE_SIZE,
Core::ENCRYPTION_INFO_STRING,
$salt
);
return new DerivedKeys($akey, $ekey);
} else {
throw new Ex\EnvironmentIsBrokenException('Bad secret type.');
}
}
/**
* Constructor for KeyOrPassword.
*
* @param int $secret_type
* @param mixed $secret (either a Key or a password string)
*/
private function __construct($secret_type, $secret)
{
$this->secret_type = $secret_type;
$this->secret = $secret;
}
}

115
vendor/defuse/php-encryption/src/KeyProtectedByPassword.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
final class KeyProtectedByPassword
{
const PASSWORD_KEY_CURRENT_VERSION = "\xDE\xF1\x00\x00";
/**
* @var string
*/
private $encrypted_key = '';
/**
* Creates a random key protected by the provided password.
*
* @param string $password
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return KeyProtectedByPassword
*/
public static function createRandomPasswordProtectedKey($password)
{
$inner_key = Key::createNewRandomKey();
/* The password is hashed as a form of poor-man's domain separation
* between this use of encryptWithPassword() and other uses of
* encryptWithPassword() that the user may also be using as part of the
* same protocol. */
$encrypted_key = Crypto::encryptWithPassword(
$inner_key->saveToAsciiSafeString(),
\hash(Core::HASH_FUNCTION_NAME, $password, true),
true
);
return new KeyProtectedByPassword($encrypted_key);
}
/**
* Loads a KeyProtectedByPassword from its encoded form.
*
* @param string $saved_key_string
*
* @throws Ex\BadFormatException
*
* @return KeyProtectedByPassword
*/
public static function loadFromAsciiSafeString($saved_key_string)
{
$encrypted_key = Encoding::loadBytesFromChecksummedAsciiSafeString(
self::PASSWORD_KEY_CURRENT_VERSION,
$saved_key_string
);
return new KeyProtectedByPassword($encrypted_key);
}
/**
* Encodes the KeyProtectedByPassword into a string of printable ASCII
* characters.
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
public function saveToAsciiSafeString()
{
return Encoding::saveBytesToChecksummedAsciiSafeString(
self::PASSWORD_KEY_CURRENT_VERSION,
$this->encrypted_key
);
}
/**
* Decrypts the protected key, returning an unprotected Key object that can
* be used for encryption and decryption.
*
* @throws Ex\EnvironmentIsBrokenException
* @throws Ex\WrongKeyOrModifiedCiphertextException
*
* @return Key
*/
public function unlockKey($password)
{
try {
$inner_key_encoded = Crypto::decryptWithPassword(
$this->encrypted_key,
\hash(Core::HASH_FUNCTION_NAME, $password, true),
true
);
return Key::loadFromAsciiSafeString($inner_key_encoded);
} catch (Ex\BadFormatException $ex) {
/* This should never happen unless an attacker replaced the
* encrypted key ciphertext with some other ciphertext that was
* encrypted with the same password. We transform the exception type
* here in order to make the API simpler, avoiding the need to
* document that this method might throw an Ex\BadFormatException. */
throw new Ex\WrongKeyOrModifiedCiphertextException(
"The decrypted key was found to be in an invalid format. " .
"This very likely indicates it was modified by an attacker."
);
}
}
/**
* Constructor for KeyProtectedByPassword.
*
* @param string $encrypted_key
*/
private function __construct($encrypted_key)
{
$this->encrypted_key = $encrypted_key;
}
}

247
vendor/defuse/php-encryption/src/RuntimeTests.php vendored Normal file
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<?php
namespace Defuse\Crypto;
use Defuse\Crypto\Exception as Ex;
/*
* We're using static class inheritance to get access to protected methods
* inside Crypto. To make it easy to know where the method we're calling can be
* found, within this file, prefix calls with `Crypto::` or `RuntimeTests::`,
* and don't use `self::`.
*/
class RuntimeTests extends Crypto
{
/**
* Runs the runtime tests.
*
* @throws Ex\EnvironmentIsBrokenException
* @return void
*/
public static function runtimeTest()
{
// 0: Tests haven't been run yet.
// 1: Tests have passed.
// 2: Tests are running right now.
// 3: Tests have failed.
static $test_state = 0;
if ($test_state === 1 || $test_state === 2) {
return;
}
if ($test_state === 3) {
/* If an intermittent problem caused a test to fail previously, we
* want that to be indicated to the user with every call to this
* library. This way, if the user first does something they really
* don't care about, and just ignores all exceptions, they won't get
* screwed when they then start to use the library for something
* they do care about. */
throw new Ex\EnvironmentIsBrokenException('Tests failed previously.');
}
try {
$test_state = 2;
Core::ensureFunctionExists('openssl_get_cipher_methods');
if (\in_array(Core::CIPHER_METHOD, \openssl_get_cipher_methods()) === false) {
throw new Ex\EnvironmentIsBrokenException(
'Cipher method not supported. This is normally caused by an outdated ' .
'version of OpenSSL (and/or OpenSSL compiled for FIPS compliance). ' .
'Please upgrade to a newer version of OpenSSL that supports ' .
Core::CIPHER_METHOD . ' to use this library.'
);
}
RuntimeTests::AESTestVector();
RuntimeTests::HMACTestVector();
RuntimeTests::HKDFTestVector();
RuntimeTests::testEncryptDecrypt();
if (Core::ourStrlen(Key::createNewRandomKey()->getRawBytes()) != Core::KEY_BYTE_SIZE) {
throw new Ex\EnvironmentIsBrokenException();
}
if (Core::ENCRYPTION_INFO_STRING == Core::AUTHENTICATION_INFO_STRING) {
throw new Ex\EnvironmentIsBrokenException();
}
} catch (Ex\EnvironmentIsBrokenException $ex) {
// Do this, otherwise it will stay in the "tests are running" state.
$test_state = 3;
throw $ex;
}
// Change this to '0' make the tests always re-run (for benchmarking).
$test_state = 1;
}
/**
* High-level tests of Crypto operations.
*
* @throws Ex\EnvironmentIsBrokenException
* @return void
*/
private static function testEncryptDecrypt()
{
$key = Key::createNewRandomKey();
$data = "EnCrYpT EvErYThInG\x00\x00";
// Make sure encrypting then decrypting doesn't change the message.
$ciphertext = Crypto::encrypt($data, $key, true);
try {
$decrypted = Crypto::decrypt($ciphertext, $key, true);
} catch (Ex\WrongKeyOrModifiedCiphertextException $ex) {
// It's important to catch this and change it into a
// Ex\EnvironmentIsBrokenException, otherwise a test failure could trick
// the user into thinking it's just an invalid ciphertext!
throw new Ex\EnvironmentIsBrokenException();
}
if ($decrypted !== $data) {
throw new Ex\EnvironmentIsBrokenException();
}
// Modifying the ciphertext: Appending a string.
try {
Crypto::decrypt($ciphertext . 'a', $key, true);
throw new Ex\EnvironmentIsBrokenException();
} catch (Ex\WrongKeyOrModifiedCiphertextException $e) { /* expected */
}
// Modifying the ciphertext: Changing an HMAC byte.
$indices_to_change = [
0, // The header.
Core::HEADER_VERSION_SIZE + 1, // the salt
Core::HEADER_VERSION_SIZE + Core::SALT_BYTE_SIZE + 1, // the IV
Core::HEADER_VERSION_SIZE + Core::SALT_BYTE_SIZE + Core::BLOCK_BYTE_SIZE + 1, // the ciphertext
];
foreach ($indices_to_change as $index) {
try {
$ciphertext[$index] = \chr((\ord($ciphertext[$index]) + 1) % 256);
Crypto::decrypt($ciphertext, $key, true);
throw new Ex\EnvironmentIsBrokenException();
} catch (Ex\WrongKeyOrModifiedCiphertextException $e) { /* expected */
}
}
// Decrypting with the wrong key.
$key = Key::createNewRandomKey();
$data = 'abcdef';
$ciphertext = Crypto::encrypt($data, $key, true);
$wrong_key = Key::createNewRandomKey();
try {
Crypto::decrypt($ciphertext, $wrong_key, true);
throw new Ex\EnvironmentIsBrokenException();
} catch (Ex\WrongKeyOrModifiedCiphertextException $e) { /* expected */
}
// Ciphertext too small.
$key = Key::createNewRandomKey();
$ciphertext = \str_repeat('A', Core::MINIMUM_CIPHERTEXT_SIZE - 1);
try {
Crypto::decrypt($ciphertext, $key, true);
throw new Ex\EnvironmentIsBrokenException();
} catch (Ex\WrongKeyOrModifiedCiphertextException $e) { /* expected */
}
}
/**
* Test HKDF against test vectors.
*
* @throws Ex\EnvironmentIsBrokenException
* @return void
*/
private static function HKDFTestVector()
{
// HKDF test vectors from RFC 5869
// Test Case 1
$ikm = \str_repeat("\x0b", 22);
$salt = Encoding::hexToBin('000102030405060708090a0b0c');
$info = Encoding::hexToBin('f0f1f2f3f4f5f6f7f8f9');
$length = 42;
$okm = Encoding::hexToBin(
'3cb25f25faacd57a90434f64d0362f2a' .
'2d2d0a90cf1a5a4c5db02d56ecc4c5bf' .
'34007208d5b887185865'
);
$computed_okm = Core::HKDF('sha256', $ikm, $length, $info, $salt);
if ($computed_okm !== $okm) {
throw new Ex\EnvironmentIsBrokenException();
}
// Test Case 7
$ikm = \str_repeat("\x0c", 22);
$length = 42;
$okm = Encoding::hexToBin(
'2c91117204d745f3500d636a62f64f0a' .
'b3bae548aa53d423b0d1f27ebba6f5e5' .
'673a081d70cce7acfc48'
);
$computed_okm = Core::HKDF('sha1', $ikm, $length, '', null);
if ($computed_okm !== $okm) {
throw new Ex\EnvironmentIsBrokenException();
}
}
/**
* Test HMAC against test vectors.
*
* @throws Ex\EnvironmentIsBrokenException
* @return void
*/
private static function HMACTestVector()
{
// HMAC test vector From RFC 4231 (Test Case 1)
$key = \str_repeat("\x0b", 20);
$data = 'Hi There';
$correct = 'b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7';
if (\hash_hmac(Core::HASH_FUNCTION_NAME, $data, $key) !== $correct) {
throw new Ex\EnvironmentIsBrokenException();
}
}
/**
* Test AES against test vectors.
*
* @throws Ex\EnvironmentIsBrokenException
* @return void
*/
private static function AESTestVector()
{
// AES CTR mode test vector from NIST SP 800-38A
$key = Encoding::hexToBin(
'603deb1015ca71be2b73aef0857d7781' .
'1f352c073b6108d72d9810a30914dff4'
);
$iv = Encoding::hexToBin('f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff');
$plaintext = Encoding::hexToBin(
'6bc1bee22e409f96e93d7e117393172a' .
'ae2d8a571e03ac9c9eb76fac45af8e51' .
'30c81c46a35ce411e5fbc1191a0a52ef' .
'f69f2445df4f9b17ad2b417be66c3710'
);
$ciphertext = Encoding::hexToBin(
'601ec313775789a5b7a7f504bbf3d228' .
'f443e3ca4d62b59aca84e990cacaf5c5' .
'2b0930daa23de94ce87017ba2d84988d' .
'dfc9c58db67aada613c2dd08457941a6'
);
$computed_ciphertext = Crypto::plainEncrypt($plaintext, $key, $iv);
if ($computed_ciphertext !== $ciphertext) {
echo \str_repeat("\n", 30);
echo \bin2hex($computed_ciphertext);
echo "\n---\n";
echo \bin2hex($ciphertext);
echo \str_repeat("\n", 30);
throw new Ex\EnvironmentIsBrokenException();
}
$computed_plaintext = Crypto::plainDecrypt($ciphertext, $key, $iv, Core::CIPHER_METHOD);
if ($computed_plaintext !== $plaintext) {
throw new Ex\EnvironmentIsBrokenException();
}
}
}

22
vendor/paragonie/random_compat/LICENSE vendored Normal file
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The MIT License (MIT)
Copyright (c) 2015 Paragon Initiative Enterprises
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

5
vendor/paragonie/random_compat/build-phar.sh vendored Normal file
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#!/usr/bin/env bash
basedir=$( dirname $( readlink -f ${BASH_SOURCE[0]} ) )
php -dphar.readonly=0 "$basedir/other/build_phar.php" $*

37
vendor/paragonie/random_compat/composer.json vendored Normal file
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{
"name": "paragonie/random_compat",
"description": "PHP 5.x polyfill for random_bytes() and random_int() from PHP 7",
"keywords": [
"csprng",
"random",
"pseudorandom"
],
"license": "MIT",
"type": "library",
"authors": [
{
"name": "Paragon Initiative Enterprises",
"email": "security@paragonie.com",
"homepage": "https://paragonie.com"
}
],
"support": {
"issues": "https://github.com/paragonie/random_compat/issues",
"email": "info@paragonie.com",
"source": "https://github.com/paragonie/random_compat"
},
"require": {
"php": ">=5.2.0"
},
"require-dev": {
"phpunit/phpunit": "4.*|5.*"
},
"suggest": {
"ext-libsodium": "Provides a modern crypto API that can be used to generate random bytes."
},
"autoload": {
"files": [
"lib/random.php"
]
}
}

5
vendor/paragonie/random_compat/dist/random_compat.phar.pubkey vendored Normal file
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-----BEGIN PUBLIC KEY-----
MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEEd+wCqJDrx5B4OldM0dQE0ZMX+lx1ZWm
pui0SUqD4G29L3NGsz9UhJ/0HjBdbnkhIK5xviT0X5vtjacF6ajgcCArbTB+ds+p
+h7Q084NuSuIpNb6YPfoUFgC/CL9kAoc
-----END PUBLIC KEY-----

11
vendor/paragonie/random_compat/dist/random_compat.phar.pubkey.asc vendored Normal file
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@ -0,0 +1,11 @@
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (MingW32)
iQEcBAABAgAGBQJWtW1hAAoJEGuXocKCZATaJf0H+wbZGgskK1dcRTsuVJl9IWip
QwGw/qIKI280SD6/ckoUMxKDCJiFuPR14zmqnS36k7N5UNPnpdTJTS8T11jttSpg
1LCmgpbEIpgaTah+cELDqFCav99fS+bEiAL5lWDAHBTE/XPjGVCqeehyPYref4IW
NDBIEsvnHPHPLsn6X5jq4+Yj5oUixgxaMPiR+bcO4Sh+RzOVB6i2D0upWfRXBFXA
NNnsg9/zjvoC7ZW73y9uSH+dPJTt/Vgfeiv52/v41XliyzbUyLalf02GNPY+9goV
JHG1ulEEBJOCiUD9cE1PUIJwHA/HqyhHIvV350YoEFiHl8iSwm7SiZu5kPjaq74=
=B6+8
-----END PGP SIGNATURE-----

181
vendor/paragonie/random_compat/lib/byte_safe_strings.php vendored Normal file
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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('RandomCompat_strlen')) {
if (
defined('MB_OVERLOAD_STRING') &&
ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
) {
/**
* strlen() implementation that isn't brittle to mbstring.func_overload
*
* This version uses mb_strlen() in '8bit' mode to treat strings as raw
* binary rather than UTF-8, ISO-8859-1, etc
*
* @param string $binary_string
*
* @throws TypeError
*
* @return int
*/
function RandomCompat_strlen($binary_string)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_strlen() expects a string'
);
}
return (int) mb_strlen($binary_string, '8bit');
}
} else {
/**
* strlen() implementation that isn't brittle to mbstring.func_overload
*
* This version just used the default strlen()
*
* @param string $binary_string
*
* @throws TypeError
*
* @return int
*/
function RandomCompat_strlen($binary_string)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_strlen() expects a string'
);
}
return (int) strlen($binary_string);
}
}
}
if (!is_callable('RandomCompat_substr')) {
if (
defined('MB_OVERLOAD_STRING')
&&
ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
) {
/**
* substr() implementation that isn't brittle to mbstring.func_overload
*
* This version uses mb_substr() in '8bit' mode to treat strings as raw
* binary rather than UTF-8, ISO-8859-1, etc
*
* @param string $binary_string
* @param int $start
* @param int $length (optional)
*
* @throws TypeError
*
* @return string
*/
function RandomCompat_substr($binary_string, $start, $length = null)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_substr(): First argument should be a string'
);
}
if (!is_int($start)) {
throw new TypeError(
'RandomCompat_substr(): Second argument should be an integer'
);
}
if ($length === null) {
/**
* mb_substr($str, 0, NULL, '8bit') returns an empty string on
* PHP 5.3, so we have to find the length ourselves.
*/
$length = RandomCompat_strlen($binary_string) - $start;
} elseif (!is_int($length)) {
throw new TypeError(
'RandomCompat_substr(): Third argument should be an integer, or omitted'
);
}
// Consistency with PHP's behavior
if ($start === RandomCompat_strlen($binary_string) && $length === 0) {
return '';
}
if ($start > RandomCompat_strlen($binary_string)) {
return '';
}
return (string) mb_substr($binary_string, $start, $length, '8bit');
}
} else {
/**
* substr() implementation that isn't brittle to mbstring.func_overload
*
* This version just uses the default substr()
*
* @param string $binary_string
* @param int $start
* @param int $length (optional)
*
* @throws TypeError
*
* @return string
*/
function RandomCompat_substr($binary_string, $start, $length = null)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_substr(): First argument should be a string'
);
}
if (!is_int($start)) {
throw new TypeError(
'RandomCompat_substr(): Second argument should be an integer'
);
}
if ($length !== null) {
if (!is_int($length)) {
throw new TypeError(
'RandomCompat_substr(): Third argument should be an integer, or omitted'
);
}
return (string) substr($binary_string, $start, $length);
}
return (string) substr($binary_string, $start);
}
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('RandomCompat_intval')) {
/**
* Cast to an integer if we can, safely.
*
* If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)
* (non-inclusive), it will sanely cast it to an int. If you it's equal to
* ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats
* lose precision, so the <= and => operators might accidentally let a float
* through.
*
* @param int|float $number The number we want to convert to an int
* @param bool $fail_open Set to true to not throw an exception
*
* @return float|int
* @psalm-suppress InvalidReturnType
*
* @throws TypeError
*/
function RandomCompat_intval($number, $fail_open = false)
{
if (is_int($number) || is_float($number)) {
$number += 0;
} elseif (is_numeric($number)) {
$number += 0;
}
if (
is_float($number)
&&
$number > ~PHP_INT_MAX
&&
$number < PHP_INT_MAX
) {
$number = (int) $number;
}
if (is_int($number)) {
return (int) $number;
} elseif (!$fail_open) {
throw new TypeError(
'Expected an integer.'
);
}
return $number;
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!class_exists('Error', false)) {
// We can't really avoid making this extend Exception in PHP 5.
class Error extends Exception
{
}
}
if (!class_exists('TypeError', false)) {
if (is_subclass_of('Error', 'Exception')) {
class TypeError extends Error
{
}
} else {
class TypeError extends Exception
{
}
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* @version 2.0.10
* @released 2017-03-13
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!defined('PHP_VERSION_ID')) {
// This constant was introduced in PHP 5.2.7
$RandomCompatversion = array_map('intval', explode('.', PHP_VERSION));
define(
'PHP_VERSION_ID',
$RandomCompatversion[0] * 10000
+ $RandomCompatversion[1] * 100
+ $RandomCompatversion[2]
);
$RandomCompatversion = null;
}
/**
* PHP 7.0.0 and newer have these functions natively.
*/
if (PHP_VERSION_ID >= 70000) {
return;
}
if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
define('RANDOM_COMPAT_READ_BUFFER', 8);
}
$RandomCompatDIR = dirname(__FILE__);
require_once $RandomCompatDIR . '/byte_safe_strings.php';
require_once $RandomCompatDIR . '/cast_to_int.php';
require_once $RandomCompatDIR . '/error_polyfill.php';
if (!is_callable('random_bytes')) {
/**
* PHP 5.2.0 - 5.6.x way to implement random_bytes()
*
* We use conditional statements here to define the function in accordance
* to the operating environment. It's a micro-optimization.
*
* In order of preference:
* 1. Use libsodium if available.
* 2. fread() /dev/urandom if available (never on Windows)
* 3. mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM)
* 4. COM('CAPICOM.Utilities.1')->GetRandom()
*
* See RATIONALE.md for our reasoning behind this particular order
*/
if (extension_loaded('libsodium')) {
// See random_bytes_libsodium.php
if (PHP_VERSION_ID >= 50300 && is_callable('\\Sodium\\randombytes_buf')) {
require_once $RandomCompatDIR . '/random_bytes_libsodium.php';
} elseif (method_exists('Sodium', 'randombytes_buf')) {
require_once $RandomCompatDIR . '/random_bytes_libsodium_legacy.php';
}
}
/**
* Reading directly from /dev/urandom:
*/
if (DIRECTORY_SEPARATOR === '/') {
// DIRECTORY_SEPARATOR === '/' on Unix-like OSes -- this is a fast
// way to exclude Windows.
$RandomCompatUrandom = true;
$RandomCompat_basedir = ini_get('open_basedir');
if (!empty($RandomCompat_basedir)) {
$RandomCompat_open_basedir = explode(
PATH_SEPARATOR,
strtolower($RandomCompat_basedir)
);
$RandomCompatUrandom = (array() !== array_intersect(
array('/dev', '/dev/', '/dev/urandom'),
$RandomCompat_open_basedir
));
$RandomCompat_open_basedir = null;
}
if (
!is_callable('random_bytes')
&&
$RandomCompatUrandom
&&
@is_readable('/dev/urandom')
) {
// Error suppression on is_readable() in case of an open_basedir
// or safe_mode failure. All we care about is whether or not we
// can read it at this point. If the PHP environment is going to
// panic over trying to see if the file can be read in the first
// place, that is not helpful to us here.
// See random_bytes_dev_urandom.php
require_once $RandomCompatDIR . '/random_bytes_dev_urandom.php';
}
// Unset variables after use
$RandomCompat_basedir = null;
} else {
$RandomCompatUrandom = false;
}
/**
* mcrypt_create_iv()
*
* We only want to use mcypt_create_iv() if:
*
* - random_bytes() hasn't already been defined
* - the mcrypt extensions is loaded
* - One of these two conditions is true:
* - We're on Windows (DIRECTORY_SEPARATOR !== '/')
* - We're not on Windows and /dev/urandom is readabale
* (i.e. we're not in a chroot jail)
* - Special case:
* - If we're not on Windows, but the PHP version is between
* 5.6.10 and 5.6.12, we don't want to use mcrypt. It will
* hang indefinitely. This is bad.
* - If we're on Windows, we want to use PHP >= 5.3.7 or else
* we get insufficient entropy errors.
*/
if (
!is_callable('random_bytes')
&&
// Windows on PHP < 5.3.7 is broken, but non-Windows is not known to be.
(DIRECTORY_SEPARATOR === '/' || PHP_VERSION_ID >= 50307)
&&
// Prevent this code from hanging indefinitely on non-Windows;
// see https://bugs.php.net/bug.php?id=69833
(
DIRECTORY_SEPARATOR !== '/' ||
(PHP_VERSION_ID <= 50609 || PHP_VERSION_ID >= 50613)
)
&&
extension_loaded('mcrypt')
) {
// See random_bytes_mcrypt.php
require_once $RandomCompatDIR . '/random_bytes_mcrypt.php';
}
$RandomCompatUrandom = null;
/**
* This is a Windows-specific fallback, for when the mcrypt extension
* isn't loaded.
*/
if (
!is_callable('random_bytes')
&&
extension_loaded('com_dotnet')
&&
class_exists('COM')
) {
$RandomCompat_disabled_classes = preg_split(
'#\s*,\s*#',
strtolower(ini_get('disable_classes'))
);
if (!in_array('com', $RandomCompat_disabled_classes)) {
try {
$RandomCompatCOMtest = new COM('CAPICOM.Utilities.1');
if (method_exists($RandomCompatCOMtest, 'GetRandom')) {
// See random_bytes_com_dotnet.php
require_once $RandomCompatDIR . '/random_bytes_com_dotnet.php';
}
} catch (com_exception $e) {
// Don't try to use it.
}
}
$RandomCompat_disabled_classes = null;
$RandomCompatCOMtest = null;
}
/**
* throw new Exception
*/
if (!is_callable('random_bytes')) {
/**
* We don't have any more options, so let's throw an exception right now
* and hope the developer won't let it fail silently.
*
* @param mixed $length
* @return void
* @throws Exception
*/
function random_bytes($length)
{
unset($length); // Suppress "variable not used" warnings.
throw new Exception(
'There is no suitable CSPRNG installed on your system'
);
}
}
}
if (!is_callable('random_int')) {
require_once $RandomCompatDIR . '/random_int.php';
}
$RandomCompatDIR = null;

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('random_bytes')) {
/**
* Windows with PHP < 5.3.0 will not have the function
* openssl_random_pseudo_bytes() available, so let's use
* CAPICOM to work around this deficiency.
*
* @param int $bytes
*
* @throws Exception
*
* @return string
*/
function random_bytes($bytes)
{
try {
$bytes = RandomCompat_intval($bytes);
} catch (TypeError $ex) {
throw new TypeError(
'random_bytes(): $bytes must be an integer'
);
}
if ($bytes < 1) {
throw new Error(
'Length must be greater than 0'
);
}
$buf = '';
if (!class_exists('COM')) {
throw new Error(
'COM does not exist'
);
}
$util = new COM('CAPICOM.Utilities.1');
$execCount = 0;
/**
* Let's not let it loop forever. If we run N times and fail to
* get N bytes of random data, then CAPICOM has failed us.
*/
do {
$buf .= base64_decode($util->GetRandom($bytes, 0));
if (RandomCompat_strlen($buf) >= $bytes) {
/**
* Return our random entropy buffer here:
*/
return RandomCompat_substr($buf, 0, $bytes);
}
++$execCount;
} while ($execCount < $bytes);
/**
* If we reach here, PHP has failed us.
*/
throw new Exception(
'Could not gather sufficient random data'
);
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
define('RANDOM_COMPAT_READ_BUFFER', 8);
}
if (!is_callable('random_bytes')) {
/**
* Unless open_basedir is enabled, use /dev/urandom for
* random numbers in accordance with best practices
*
* Why we use /dev/urandom and not /dev/random
* @ref http://sockpuppet.org/blog/2014/02/25/safely-generate-random-numbers
*
* @param int $bytes
*
* @throws Exception
*
* @return string
*/
function random_bytes($bytes)
{
static $fp = null;
/**
* This block should only be run once
*/
if (empty($fp)) {
/**
* We use /dev/urandom if it is a char device.
* We never fall back to /dev/random
*/
$fp = fopen('/dev/urandom', 'rb');
if (!empty($fp)) {
$st = fstat($fp);
if (($st['mode'] & 0170000) !== 020000) {
fclose($fp);
$fp = false;
}
}
if (!empty($fp)) {
/**
* stream_set_read_buffer() does not exist in HHVM
*
* If we don't set the stream's read buffer to 0, PHP will
* internally buffer 8192 bytes, which can waste entropy
*
* stream_set_read_buffer returns 0 on success
*/
if (is_callable('stream_set_read_buffer')) {
stream_set_read_buffer($fp, RANDOM_COMPAT_READ_BUFFER);
}
if (is_callable('stream_set_chunk_size')) {
stream_set_chunk_size($fp, RANDOM_COMPAT_READ_BUFFER);
}
}
}
try {
$bytes = RandomCompat_intval($bytes);
} catch (TypeError $ex) {
throw new TypeError(
'random_bytes(): $bytes must be an integer'
);
}
if ($bytes < 1) {
throw new Error(
'Length must be greater than 0'
);
}
/**
* This if() block only runs if we managed to open a file handle
*
* It does not belong in an else {} block, because the above
* if (empty($fp)) line is logic that should only be run once per
* page load.
*/
if (!empty($fp)) {
/**
* @var int
*/
$remaining = $bytes;
/**
* @var string|bool
*/
$buf = '';
/**
* We use fread() in a loop to protect against partial reads
*/
do {
/**
* @var string|bool
*/
$read = fread($fp, $remaining);
if (!is_string($read)) {
if ($read === false) {
/**
* We cannot safely read from the file. Exit the
* do-while loop and trigger the exception condition
*
* @var string|bool
*/
$buf = false;
break;
}
}
/**
* Decrease the number of bytes returned from remaining
*/
$remaining -= RandomCompat_strlen($read);
/**
* @var string|bool
*/
$buf = $buf . $read;
} while ($remaining > 0);
/**
* Is our result valid?
*/
if (is_string($buf)) {
if (RandomCompat_strlen($buf) === $bytes) {
/**
* Return our random entropy buffer here:
*/
return $buf;
}
}
}
/**
* If we reach here, PHP has failed us.
*/
throw new Exception(
'Error reading from source device'
);
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('random_bytes')) {
/**
* If the libsodium PHP extension is loaded, we'll use it above any other
* solution.
*
* libsodium-php project:
* @ref https://github.com/jedisct1/libsodium-php
*
* @param int $bytes
*
* @throws Exception
*
* @return string
*/
function random_bytes($bytes)
{
try {
$bytes = RandomCompat_intval($bytes);
} catch (TypeError $ex) {
throw new TypeError(
'random_bytes(): $bytes must be an integer'
);
}
if ($bytes < 1) {
throw new Error(
'Length must be greater than 0'
);
}
/**
* \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
* generated in one invocation.
*/
if ($bytes > 2147483647) {
$buf = '';
for ($i = 0; $i < $bytes; $i += 1073741824) {
$n = ($bytes - $i) > 1073741824
? 1073741824
: $bytes - $i;
$buf .= \Sodium\randombytes_buf($n);
}
} else {
$buf = \Sodium\randombytes_buf($bytes);
}
if ($buf !== false) {
if (RandomCompat_strlen($buf) === $bytes) {
return $buf;
}
}
/**
* If we reach here, PHP has failed us.
*/
throw new Exception(
'Could not gather sufficient random data'
);
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('random_bytes')) {
/**
* If the libsodium PHP extension is loaded, we'll use it above any other
* solution.
*
* libsodium-php project:
* @ref https://github.com/jedisct1/libsodium-php
*
* @param int $bytes
*
* @throws Exception
*
* @return string
*/
function random_bytes($bytes)
{
try {
$bytes = RandomCompat_intval($bytes);
} catch (TypeError $ex) {
throw new TypeError(
'random_bytes(): $bytes must be an integer'
);
}
if ($bytes < 1) {
throw new Error(
'Length must be greater than 0'
);
}
/**
* @var string
*/
$buf = '';
/**
* \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
* generated in one invocation.
*/
if ($bytes > 2147483647) {
for ($i = 0; $i < $bytes; $i += 1073741824) {
$n = ($bytes - $i) > 1073741824
? 1073741824
: $bytes - $i;
$buf .= Sodium::randombytes_buf((int) $n);
}
} else {
$buf .= Sodium::randombytes_buf((int) $bytes);
}
if (is_string($buf)) {
if (RandomCompat_strlen($buf) === $bytes) {
return $buf;
}
}
/**
* If we reach here, PHP has failed us.
*/
throw new Exception(
'Could not gather sufficient random data'
);
}
}

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<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
if (!is_callable('random_bytes')) {
/**
* Powered by ext/mcrypt (and thankfully NOT libmcrypt)
*
* @ref https://bugs.php.net/bug.php?id=55169
* @ref https://github.com/php/php-src/blob/c568ffe5171d942161fc8dda066bce844bdef676/ext/mcrypt/mcrypt.c#L1321-L1386
*
* @param int $bytes
*
* @throws Exception
*
* @return string
*/
function random_bytes($bytes)
{
try {
$bytes = RandomCompat_intval($bytes);
} catch (TypeError $ex) {
throw new TypeError(
'random_bytes(): $bytes must be an integer'
);
}
if ($bytes < 1) {
throw new Error(
'Length must be greater than 0'
);
}
$buf = @mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM);
if (
$buf !== false
&&
RandomCompat_strlen($buf) === $bytes
) {
/**
* Return our random entropy buffer here:
*/
return $buf;
}
/**
* If we reach here, PHP has failed us.
*/
throw new Exception(
'Could not gather sufficient random data'
);
}
}

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vendor/paragonie/random_compat/lib/random_int.php vendored Normal file
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<?php
if (!is_callable('random_int')) {
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* Fetch a random integer between $min and $max inclusive
*
* @param int $min
* @param int $max
*
* @throws Exception
*
* @return int
*/
function random_int($min, $max)
{
/**
* Type and input logic checks
*
* If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)
* (non-inclusive), it will sanely cast it to an int. If you it's equal to
* ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats
* lose precision, so the <= and => operators might accidentally let a float
* through.
*/
try {
$min = RandomCompat_intval($min);
} catch (TypeError $ex) {
throw new TypeError(
'random_int(): $min must be an integer'
);
}
try {
$max = RandomCompat_intval($max);
} catch (TypeError $ex) {
throw new TypeError(
'random_int(): $max must be an integer'
);
}
/**
* Now that we've verified our weak typing system has given us an integer,
* let's validate the logic then we can move forward with generating random
* integers along a given range.
*/
if ($min > $max) {
throw new Error(
'Minimum value must be less than or equal to the maximum value'
);
}
if ($max === $min) {
return (int) $min;
}
/**
* Initialize variables to 0
*
* We want to store:
* $bytes => the number of random bytes we need
* $mask => an integer bitmask (for use with the &) operator
* so we can minimize the number of discards
*/
$attempts = $bits = $bytes = $mask = $valueShift = 0;
/**
* At this point, $range is a positive number greater than 0. It might
* overflow, however, if $max - $min > PHP_INT_MAX. PHP will cast it to
* a float and we will lose some precision.
*/
$range = $max - $min;
/**
* Test for integer overflow:
*/
if (!is_int($range)) {
/**
* Still safely calculate wider ranges.
* Provided by @CodesInChaos, @oittaa
*
* @ref https://gist.github.com/CodesInChaos/03f9ea0b58e8b2b8d435
*
* We use ~0 as a mask in this case because it generates all 1s
*
* @ref https://eval.in/400356 (32-bit)
* @ref http://3v4l.org/XX9r5 (64-bit)
*/
$bytes = PHP_INT_SIZE;
$mask = ~0;
} else {
/**
* $bits is effectively ceil(log($range, 2)) without dealing with
* type juggling
*/
while ($range > 0) {
if ($bits % 8 === 0) {
++$bytes;
}
++$bits;
$range >>= 1;
$mask = $mask << 1 | 1;
}
$valueShift = $min;
}
$val = 0;
/**
* Now that we have our parameters set up, let's begin generating
* random integers until one falls between $min and $max
*/
do {
/**
* The rejection probability is at most 0.5, so this corresponds
* to a failure probability of 2^-128 for a working RNG
*/
if ($attempts > 128) {
throw new Exception(
'random_int: RNG is broken - too many rejections'
);
}
/**
* Let's grab the necessary number of random bytes
*/
$randomByteString = random_bytes($bytes);
/**
* Let's turn $randomByteString into an integer
*
* This uses bitwise operators (<< and |) to build an integer
* out of the values extracted from ord()
*
* Example: [9F] | [6D] | [32] | [0C] =>
* 159 + 27904 + 3276800 + 201326592 =>
* 204631455
*/
$val &= 0;
for ($i = 0; $i < $bytes; ++$i) {
$val |= ord($randomByteString[$i]) << ($i * 8);
}
/**
* Apply mask
*/
$val &= $mask;
$val += $valueShift;
++$attempts;
/**
* If $val overflows to a floating point number,
* ... or is larger than $max,
* ... or smaller than $min,
* then try again.
*/
} while (!is_int($val) || $val > $max || $val < $min);
return (int) $val;
}
}

57
vendor/paragonie/random_compat/other/build_phar.php vendored Normal file
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<?php
$dist = dirname(__DIR__).'/dist';
if (!is_dir($dist)) {
mkdir($dist, 0755);
}
if (file_exists($dist.'/random_compat.phar')) {
unlink($dist.'/random_compat.phar');
}
$phar = new Phar(
$dist.'/random_compat.phar',
FilesystemIterator::CURRENT_AS_FILEINFO | \FilesystemIterator::KEY_AS_FILENAME,
'random_compat.phar'
);
rename(
dirname(__DIR__).'/lib/random.php',
dirname(__DIR__).'/lib/index.php'
);
$phar->buildFromDirectory(dirname(__DIR__).'/lib');
rename(
dirname(__DIR__).'/lib/index.php',
dirname(__DIR__).'/lib/random.php'
);
/**
* If we pass an (optional) path to a private key as a second argument, we will
* sign the Phar with OpenSSL.
*
* If you leave this out, it will produce an unsigned .phar!
*/
if ($argc > 1) {
if (!@is_readable($argv[1])) {
echo 'Could not read the private key file:', $argv[1], "\n";
exit(255);
}
$pkeyFile = file_get_contents($argv[1]);
$private = openssl_get_privatekey($pkeyFile);
if ($private !== false) {
$pkey = '';
openssl_pkey_export($private, $pkey);
$phar->setSignatureAlgorithm(Phar::OPENSSL, $pkey);
/**
* Save the corresponding public key to the file
*/
if (!@is_readable($dist.'/random_compat.phar.pubkey')) {
$details = openssl_pkey_get_details($private);
file_put_contents(
$dist.'/random_compat.phar.pubkey',
$details['key']
);
}
} else {
echo 'An error occurred reading the private key from OpenSSL.', "\n";
exit(255);
}
}

9
vendor/paragonie/random_compat/psalm-autoload.php vendored Normal file
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<?php
require_once 'lib/byte_safe_strings.php';
require_once 'lib/cast_to_int.php';
require_once 'lib/error_polyfill.php';
require_once 'other/ide_stubs/libsodium.php';
require_once 'lib/random.php';
$int = random_int(0, 65536);

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vendor/paragonie/random_compat/psalm.xml vendored Normal file
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<?xml version="1.0"?>
<psalm
autoloader="psalm-autoload.php"
stopOnFirstError="false"
useDocblockTypes="true"
>
<projectFiles>
<directory name="lib" />
</projectFiles>
<issueHandlers>
<DuplicateClass errorLevel="info" />
<InvalidOperand errorLevel="info" />
<UndefinedConstant errorLevel="info" />
<MissingReturnType errorLevel="info" />
</issueHandlers>
</psalm>