X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fcrypto.php;h=0feb45c2474b58edbb0f27e066d7c382eaf2e992;hb=9b6e91086b29554fd04362f6c87ea148718e8b1c;hp=a75a9aa744130206b0630065879644f75ee6227c;hpb=8fa6f492420f830b4c9c06f2f391853e82285825;p=friendica.git

diff --git a/include/crypto.php b/include/crypto.php
old mode 100644
new mode 100755
index a75a9aa744..0feb45c247
--- a/include/crypto.php
+++ b/include/crypto.php
@@ -9,7 +9,7 @@ function rsa_sign($data,$key,$alg = 'sha256') {
 
 	$sig = '';
 	if (version_compare(PHP_VERSION, '5.3.0', '>=') || $alg === 'sha1') {
-		openssl_sign($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : 'sha256'));
+		openssl_sign($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
     }
     else {
 		if(strlen($key) < 1024 || extension_loaded('gmp')) {
@@ -31,7 +31,7 @@ function rsa_sign($data,$key,$alg = 'sha256') {
 function rsa_verify($data,$sig,$key,$alg = 'sha256') {
 
 	if (version_compare(PHP_VERSION, '5.3.0', '>=') || $alg === 'sha1') {
-		$verify = openssl_verify($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : 'sha256'));
+		$verify = openssl_verify($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
     }
     else {
 		if(strlen($key) <= 300 || extension_loaded('gmp')) {
@@ -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