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friendica_2020-09-1_sharedH.../library/defuse/php-encryption-1.2.1/example.php
Fabrixxm 6fbb02fb93 RINO 2 based on php-encryption
reenable RINO 1 functions, add a deprecation note.
use by default RINO 2 , with crypto from php-encryption
fallback to RINO 1 for old nodes.
2015-06-23 16:13:09 +02:00

37 lines
1.3 KiB
PHP

<?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');
}
?>