diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/diaspora.php | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/include/diaspora.php b/include/diaspora.php new file mode 100644 index 000000000..eedcad719 --- /dev/null +++ b/include/diaspora.php @@ -0,0 +1,90 @@ +<?php + + + + +function diaspora_base_message($type,$data) { + + $tpl = get_markup_template('diaspora_' . $type . '.tpl'); + if(! $tpl) + return ''; + return replace_macros($tpl,$data); + +} + + +function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey) { + $a = get_app(); + + $inner_aes_key = random_string(16); + $b_inner_aes_key = base64_encode($inner_aes_key); + $inner_iv = random_string(16); + $b_inner_iv = base64_encode($inner_iv); + + $outer_aes_key = random_string(16); + $b_outer_aes_key = base64_encode($outer_aes_key); + $outer_iv = random_string(16); + $b_outer_iv = base64_encode($outer_iv); + + $handle = 'acct:' . $user['nickname'] . '@' . substr($a->get_baseurl(), strpos('://') + 3); + + $padded_data = pkcs5_pad($msg); + $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv); + + $b64_data = base64_encode($inner_encrypted); + $b64url_data = base64url_encode($b64_data); + $b64url_stripped = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data); + $lines = str_split($b64url_stripped,60); + $data = implode("\n",$lines); + $data = $data . (($data[-1] != "\n") ? "\n" : '') ; + $type = 'application/atom+xml'; + $encoding = 'base64url'; + $alg = 'RSA-SHA256'; + + $signable_data = $data . '.' . base64url_encode($type) . "\n" . '.' + . base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n"; + + $signature = ''; + $result = openssl_sign($signable_data,$signature,$prvkey,'SHA256'); + + $sig = base64url_encode($signature); + +$decrypted_header = <<< EOT +<decrypted_header> + <iv>$b_inner_iv</iv> + <aes_key>$b_inner_aes_key</aes_key> + <author> + <name>{$contact['name']}</name> + <uri>$handle</uri> + </author> +</decrypted_header> +EOT; + + $decrypted_header = pkcs5_pad($decrypted_header); + $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv); + + $outer_json = json_encode(array('iv' => $b64_outer_iv,'key' => $b64_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); + $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle), + 'ciphertext' => base64_encode($ciphertext))); + $encrypted_header = '<encrypted_header>' . base64_encode($encrypted_header_json_object) . '</encrypted_header>'; + +$magicenv = <<< EOT +<?xml version='1.0' encoding='UTF-8'?> +<entry xmlns='http://www.w3.org/2005/Atom'> + $encrypted_header + <me:env xmlns:me="http://salmon-protocol.org/ns/magic-env"> + <me:encoding>base64url</me:encoding> + <me:alg>RSA-SHA256</me:alg> + <me:data type="application/atom+xml">$data</me:data> + <me:sig>$sig</me:sig> + </me:env> +</entry> +EOT; + + return $magic_env; + +}
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