add remove_user hook (it looks like dreamhost changed all my file permissions, this...

[friendica.git] / include / crypto.php

diff --git a/include/crypto.php b/include/crypto.php
old mode 100644 (file)
new mode 100755 (executable)
index a20606d..0feb45c
--- a/include/crypto.php
+++ b/include/crypto.php
@@ -225,3 +225,71 @@ function pkcs5_unpad($text)
     if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
     return substr($text, 0, -1 * $pad);
 } 
+
+function AES256CBC_encrypt($data,$key,$iv) {
+       return mcrypt_encrypt(
+               MCRYPT_RIJNDAEL_128, 
+               str_pad($key,32,"\0"), 
+               pkcs5_pad($data,16), 
+               MCRYPT_MODE_CBC, 
+               str_pad($iv,16,"\0"));
+}
+
+function AES256CBC_decrypt($data,$key,$iv) {
+       return pkcs5_unpad(mcrypt_decrypt(
+               MCRYPT_RIJNDAEL_128, 
+               str_pad($key,32,"\0"), 
+               $data, 
+               MCRYPT_MODE_CBC, 
+               str_pad($iv,16,"\0")));
+}
+
+function aes_encapsulate($data,$pubkey) {
+       $key = random_string(32,RANDOM_STRING_TEXT);
+       $iv  = random_string(16,RANDOM_STRING_TEXT);
+       $result['data'] = base64url_encode(AES256CBC_encrypt($data,$key,$iv),true);
+       openssl_public_encrypt($key,$k,$pubkey);
+       $result['key'] = base64url_encode($k,true);
+       openssl_public_encrypt($iv,$i,$pubkey);
+       $result['iv'] = base64url_encode($i,true);
+       return $result;
+}
+
+function aes_unencapsulate($data,$prvkey) {
+       openssl_private_decrypt(base64url_decode($data['key']),$k,$prvkey);
+       openssl_private_decrypt(base64url_decode($data['iv']),$i,$prvkey);
+       return AES256CBC_decrypt(base64url_decode($data['data']),$k,$i);
+}
+
+
+// This has been superceded.
+
+function zot_encapsulate($data,$envelope,$pubkey) {
+$res = aes_encapsulate($data,$pubkey);
+
+return <<< EOT
+<?xml version='1.0' encoding='UTF-8'?>
+<zot:msg xmlns:zot='http://purl.org/zot/1.0'>
+ <zot:key>{$res['key']}</zot:key>
+ <zot:iv>{$res['iv']}</zot:iv>
+ <zot:env>$s1</zot:env>
+ <zot:sig key_id="$keyid">$sig</zot:sig>
+ <zot:alg>AES-256-CBC</zot:alg>
+ <zot:data type='application/magic-envelope+xml'>{$res['data']}</zot:data>
+</zot:msg>
+EOT;
+
+}
+
+// so has this
+
+function zot_unencapsulate($data,$prvkey) {
+       $ret = array();
+       $c = array();
+       $x = parse_xml_string($data);
+       $c = array('key' => $x->key,'iv' => $x->iv,'data' => $x->data);
+       openssl_private_decrypt(base64url_decode($x->sender),$s,$prvkey);
+       $ret['sender'] = $s;
+       $ret['data'] = aes_unencapsulate($x,$prvkey);
+       return $ret;
+}
\ No newline at end of file