From e33ac224b00e243601d37dd622d7c5fc3a172be3 Mon Sep 17 00:00:00 2001 From: Michael Date: Sat, 17 Jun 2017 08:58:28 +0000 Subject: [PATCH] Now the Salmons flys --- include/diaspora.php | 181 ++++++------------------------------------- 1 file changed, 22 insertions(+), 159 deletions(-) diff --git a/include/diaspora.php b/include/diaspora.php index ac87bcacb..671bb34ae 100644 --- a/include/diaspora.php +++ b/include/diaspora.php @@ -2717,7 +2717,12 @@ class Diaspora { $encoding = "base64url"; $alg = "RSA-SHA256"; $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); $xmldata = array("me:env" => array("me:data" => $data, @@ -2732,140 +2737,6 @@ class Diaspora { return xml::from_array($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 $magic_env; - } - /** * @brief Create the envelope for a message * @@ -2880,25 +2751,15 @@ class Diaspora { */ private static function build_message($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) { - if (!$public) { - $msg = Diaspora::encode_private_data($msg, $user, $contact, $prvkey, $pubkey); - } - - $slap = Diaspora::build_magic_envelope($msg, $user); - return $slap; + // Private messages are put into a second envelope, encrypted with the receivers public key + if (!$public) { + $envelope = self::encode_private_data($envelope, $user, $contact, $prvkey, $pubkey); } - if ($public) { - $magic_env = self::build_public_message($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; + return $envelope; } /** @@ -2924,14 +2785,14 @@ class Diaspora { * * @param array $owner the array of the item owner * @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 $queue_run Is the transmission called from the queue? * @param string $guid message guid * * @return int Result of the transmission */ - public static function transmit($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(); @@ -2952,7 +2813,9 @@ class Diaspora { $return_code = 0; } else { if (!intval(get_config("system", "diaspora_test"))) { - post_url($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(); } else { logger("test_mode"); @@ -2968,14 +2831,14 @@ class Diaspora { $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1", intval($contact["id"]), dbesc(NETWORK_DIASPORA), - dbesc($slap), + dbesc($envelope), intval($public_batch) ); if ($r) { logger("add_to_queue ignored - identical item already in queue"); } else { // queue message for redelivery - add_to_queue($contact["id"], NETWORK_DIASPORA, $slap, $public_batch); + add_to_queue($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch); // The message could not be delivered. We mark the contact as "dead" mark_for_death($contact); @@ -3028,13 +2891,13 @@ class Diaspora { if ($owner['uprvkey'] == "") $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) { - add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch); + add_to_queue($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch); return true; } 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);