6 function diaspora_base_message($type,$data) {
8 $tpl = get_markup_template('diaspora_' . $type . '.tpl');
11 return replace_macros($tpl,$data);
16 function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey) {
19 $inner_aes_key = random_string(16);
20 $b_inner_aes_key = base64_encode($inner_aes_key);
21 $inner_iv = random_string(16);
22 $b_inner_iv = base64_encode($inner_iv);
24 $outer_aes_key = random_string(16);
25 $b_outer_aes_key = base64_encode($outer_aes_key);
26 $outer_iv = random_string(16);
27 $b_outer_iv = base64_encode($outer_iv);
29 $handle = 'acct:' . $user['nickname'] . '@' . substr($a->get_baseurl(), strpos('://') + 3);
31 $padded_data = pkcs5_pad($msg);
32 $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
34 $b64_data = base64_encode($inner_encrypted);
35 $b64url_data = base64url_encode($b64_data);
36 $b64url_stripped = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
37 $lines = str_split($b64url_stripped,60);
38 $data = implode("\n",$lines);
39 $data = $data . (($data[-1] != "\n") ? "\n" : '') ;
40 $type = 'application/atom+xml';
41 $encoding = 'base64url';
44 $signable_data = $data . '.' . base64url_encode($type) . "\n" . '.'
45 . base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
48 $result = openssl_sign($signable_data,$signature,$prvkey,'SHA256');
50 $sig = base64url_encode($signature);
52 $decrypted_header = <<< EOT
55 <aes_key>$b_inner_aes_key</aes_key>
57 <name>{$contact['name']}</name>
63 $decrypted_header = pkcs5_pad($decrypted_header);
64 $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
66 $outer_json = json_encode(array('iv' => $b64_outer_iv,'key' => $b64_outer_aes_key));
67 $encrypted_outer_key_bundle = '';
68 openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
70 $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
71 $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle),
72 'ciphertext' => base64_encode($ciphertext)));
73 $encrypted_header = '<encrypted_header>' . base64_encode($encrypted_header_json_object) . '</encrypted_header>';
76 <?xml version='1.0' encoding='UTF-8'?>
77 <entry xmlns='http://www.w3.org/2005/Atom'>
79 <me:env xmlns:me="http://salmon-protocol.org/ns/magic-env">
80 <me:encoding>base64url</me:encoding>
81 <me:alg>RSA-SHA256</me:alg>
82 <me:data type="application/atom+xml">$data</me:data>