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Now the Salmons flys

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Michael 2017-06-17 08:58:28 +00:00
parent 2ee8d1694f
commit e33ac224b0
1 changed files with 22 additions and 159 deletions
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181
include/diaspora.php
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@ -2717,7 +2717,12 @@ class Diaspora {
$encoding = "base64url"; $encoding = "base64url";
$alg = "RSA-SHA256"; $alg = "RSA-SHA256";
$signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg); $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
$signature = rsa_sign($signable_data, $user["prvkey"]);
// Fallback if the private key wasn't transmitted in the expected field
if ($user['uprvkey'] == "")
$user['uprvkey'] = $user['prvkey'];
$signature = rsa_sign($signable_data, $user["uprvkey"]);
$sig = base64url_encode($signature); $sig = base64url_encode($signature);
$xmldata = array("me:env" => array("me:data" => $data, $xmldata = array("me:env" => array("me:data" => $data,
@ -2732,140 +2737,6 @@ class Diaspora {
return xml::from_array($xmldata, $xml, false, $namespaces); return xml::from_array($xmldata, $xml, false, $namespaces);
} }
/**
* @brief Creates the envelope for a public message
*
* @param string $msg The message that is to be transmitted
* @param array $user The record of the sender
* @param array $contact Target of the communication
* @param string $prvkey The private key of the sender
* @param string $pubkey The public key of the receiver
*
* @return string The envelope
*/
private static function build_public_message($msg, $user, $contact, $prvkey, $pubkey) {
logger("Message: ".$msg, LOGGER_DATA);
$handle = self::my_handle($user);
$b64url_data = base64url_encode($msg);
$data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
$type = "application/xml";
$encoding = "base64url";
$alg = "RSA-SHA256";
$signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
$xmldata = array("diaspora" => array("header" => array("author_id" => $handle),
"me:env" => array("me:encoding" => $encoding,
"me:alg" => $alg,
"me:data" => $data,
"@attributes" => array("type" => $type),
"me:sig" => $sig)));
$namespaces = array("" => "https://joindiaspora.com/protocol",
"me" => "http://salmon-protocol.org/ns/magic-env");
$magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
logger("magic_env: ".$magic_env, LOGGER_DATA);
return $magic_env;
}
/**
* @brief Creates the envelope for a private message
*
* @param string $msg The message that is to be transmitted
* @param array $user The record of the sender
* @param array $contact Target of the communication
* @param string $prvkey The private key of the sender
* @param string $pubkey The public key of the receiver
*
* @return string The envelope
*/
private static function build_private_message($msg, $user, $contact, $prvkey, $pubkey) {
logger("Message: ".$msg, LOGGER_DATA);
// without a public key nothing will work
if (!$pubkey) {
logger("pubkey missing: contact id: ".$contact["id"]);
return false;
}
$inner_aes_key = openssl_random_pseudo_bytes(32);
$b_inner_aes_key = base64_encode($inner_aes_key);
$inner_iv = openssl_random_pseudo_bytes(16);
$b_inner_iv = base64_encode($inner_iv);
$outer_aes_key = openssl_random_pseudo_bytes(32);
$b_outer_aes_key = base64_encode($outer_aes_key);
$outer_iv = openssl_random_pseudo_bytes(16);
$b_outer_iv = base64_encode($outer_iv);
$handle = self::my_handle($user);
$inner_encrypted = self::aes_encrypt($inner_aes_key, $inner_iv, $msg);
$b64_data = base64_encode($inner_encrypted);
$b64url_data = base64url_encode($b64_data);
$data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
$type = "application/xml";
$encoding = "base64url";
$alg = "RSA-SHA256";
$signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
$xmldata = array("decrypted_header" => array("iv" => $b_inner_iv,
"aes_key" => $b_inner_aes_key,
"author_id" => $handle));
$decrypted_header = xml::from_array($xmldata, $xml, true);
$ciphertext = self::aes_encrypt($outer_aes_key, $outer_iv, $decrypted_header);
$outer_json = json_encode(array("iv" => $b_outer_iv, "key" => $b_outer_aes_key));
$encrypted_outer_key_bundle = "";
openssl_public_encrypt($outer_json, $encrypted_outer_key_bundle, $pubkey);
$b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
logger("outer_bundle: ".$b64_encrypted_outer_key_bundle." key: ".$pubkey, LOGGER_DATA);
$encrypted_header_json_object = json_encode(array("aes_key" => base64_encode($encrypted_outer_key_bundle),
"ciphertext" => base64_encode($ciphertext)));
$cipher_json = base64_encode($encrypted_header_json_object);
$xmldata = array("diaspora" => array("encrypted_header" => $cipher_json,
"me:env" => array("me:encoding" => $encoding,
"me:alg" => $alg,
"me:data" => $data,
"@attributes" => array("type" => $type),
"me:sig" => $sig)));
$namespaces = array("" => "https://joindiaspora.com/protocol",
"me" => "http://salmon-protocol.org/ns/magic-env");
$magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
logger("magic_env: ".$magic_env, LOGGER_DATA);
return $magic_env;
}
/** /**
* @brief Create the envelope for a message * @brief Create the envelope for a message
* *
@ -2880,25 +2751,15 @@ class Diaspora {
*/ */
private static function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false) { private static function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false) {
$new = Config::get('system', 'new_diaspora', null, true); // The message is put into an envelope with the sender's signature
$envelope = self::build_magic_envelope($msg, $user);
if ($new) { // Private messages are put into a second envelope, encrypted with the receivers public key
if (!$public) { if (!$public) {
$msg = Diaspora::encode_private_data($msg, $user, $contact, $prvkey, $pubkey); $envelope = self::encode_private_data($envelope, $user, $contact, $prvkey, $pubkey);
}
$slap = Diaspora::build_magic_envelope($msg, $user);
return $slap;
} }
if ($public) { return $envelope;
$magic_env = self::build_public_message($msg, $user, $contact, $prvkey, $pubkey);
} else {
$magic_env = self::build_private_message($msg, $user, $contact, $prvkey, $pubkey);
}
// The data that will be transmitted is double encoded via "urlencode", strange ...
$slap = "xml=".urlencode(urlencode($magic_env));
return $slap;
} }
/** /**
@ -2924,14 +2785,14 @@ class Diaspora {
* *
* @param array $owner the array of the item owner * @param array $owner the array of the item owner
* @param array $contact Target of the communication * @param array $contact Target of the communication
* @param string $slap The message that is to be transmitted * @param string $envelope The message that is to be transmitted
* @param bool $public_batch Is it a public post? * @param bool $public_batch Is it a public post?
* @param bool $queue_run Is the transmission called from the queue? * @param bool $queue_run Is the transmission called from the queue?
* @param string $guid message guid * @param string $guid message guid
* *
* @return int Result of the transmission * @return int Result of the transmission
*/ */
public static function transmit($owner, $contact, $slap, $public_batch, $queue_run=false, $guid = "") { public static function transmit($owner, $contact, $envelope, $public_batch, $queue_run=false, $guid = "") {
$a = get_app(); $a = get_app();
@ -2952,7 +2813,9 @@ class Diaspora {
$return_code = 0; $return_code = 0;
} else { } else {
if (!intval(get_config("system", "diaspora_test"))) { if (!intval(get_config("system", "diaspora_test"))) {
post_url($dest_url."/", $slap); $content_type = (($public_batch) ? "application/magic-envelope+xml" : "application/json");
post_url($dest_url."/", $envelope, array("Content-Type: ".$content_type));
$return_code = $a->get_curl_code(); $return_code = $a->get_curl_code();
} else { } else {
logger("test_mode"); logger("test_mode");
@ -2968,14 +2831,14 @@ class Diaspora {
$r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1", $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1",
intval($contact["id"]), intval($contact["id"]),
dbesc(NETWORK_DIASPORA), dbesc(NETWORK_DIASPORA),
dbesc($slap), dbesc($envelope),
intval($public_batch) intval($public_batch)
); );
if ($r) { if ($r) {
logger("add_to_queue ignored - identical item already in queue"); logger("add_to_queue ignored - identical item already in queue");
} else { } else {
// queue message for redelivery // queue message for redelivery
add_to_queue($contact["id"], NETWORK_DIASPORA, $slap, $public_batch); add_to_queue($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch);
// The message could not be delivered. We mark the contact as "dead" // The message could not be delivered. We mark the contact as "dead"
mark_for_death($contact); mark_for_death($contact);
@ -3028,13 +2891,13 @@ class Diaspora {
if ($owner['uprvkey'] == "") if ($owner['uprvkey'] == "")
$owner['uprvkey'] = $owner['prvkey']; $owner['uprvkey'] = $owner['prvkey'];
$slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch); $envelope = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
if ($spool) { if ($spool) {
add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch); add_to_queue($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch);
return true; return true;
} else } else
$return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid); $return_code = self::transmit($owner, $contact, $envelope, $public_batch, false, $guid);
logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG); logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);