X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fcrypto.php;h=ed0a35704e8a5c8f97ab7f26038828fd5b2fd53b;hb=431a4d40ebd266af892c62f05f3f5082c3a16b69;hp=999b48be4d6d6bc8988506fcc5f314f89ca93d2c;hpb=0d9d576aa642e02eb8673aa20bdf4b6a18ae6bc3;p=friendica.git

diff --git a/include/crypto.php b/include/crypto.php
index 999b48be4d..ed0a35704e 100644
--- a/include/crypto.php
+++ b/include/crypto.php
@@ -3,19 +3,20 @@
 require_once('library/ASNValue.class.php');
 require_once('library/asn1.php');
 
+// supported algorithms are 'sha256', 'sha1'
 
-function rsa_sign($data,$key) {
+function rsa_sign($data,$key,$alg = 'sha256') {
 
 	$sig = '';
-	if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
-		openssl_sign($data,$sig,$key,'sha256');
+	if (version_compare(PHP_VERSION, '5.3.0', '>=') || $alg === 'sha1') {
+		openssl_sign($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
     }
     else {
 		if(strlen($key) < 1024 || extension_loaded('gmp')) {
 			require_once('library/phpsec/Crypt/RSA.php');
 			$rsa = new CRYPT_RSA();
 			$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
-			$rsa->setHash('sha256');
+			$rsa->setHash($alg);
 			$rsa->loadKey($key);
 			$sig = $rsa->sign($data);
 		}
@@ -27,17 +28,17 @@ function rsa_sign($data,$key) {
 	return $sig;
 }
 
-function rsa_verify($data,$sig,$key) {
+function rsa_verify($data,$sig,$key,$alg = 'sha256') {
 
-	if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
-		$verify = openssl_verify($data,$sig,$key,'sha256');
+	if (version_compare(PHP_VERSION, '5.3.0', '>=') || $alg === 'sha1') {
+		$verify = openssl_verify($data,$sig,$key,(($alg == 'sha1') ? OPENSSL_ALGO_SHA1 : $alg));
     }
     else {
 		if(strlen($key) <= 300 || extension_loaded('gmp')) {
 			require_once('library/phpsec/Crypt/RSA.php');
 			$rsa = new CRYPT_RSA();
 			$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
-			$rsa->setHash('sha256');
+			$rsa->setHash($alg);
 			$rsa->loadKey($key);
 			$verify = $rsa->verify($data,$sig);
 		}
@@ -224,3 +225,72 @@ function pkcs5_unpad($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);
+}
+
+function new_keypair($bits) {
+
+	$openssl_options = array(
+		'digest_alg'       => 'sha1',
+		'private_key_bits' => $bits,
+		'encrypt_key'      => false 
+	);
+
+	$conf = get_config('system','openssl_conf_file');
+	if($conf)
+		$openssl_options['config'] = $conf;
+	
+	$result = openssl_pkey_new($openssl_options);
+
+	if(empty($result)) {
+		logger('new_keypair: failed');
+		return false;
+	}
+
+	// Get private key
+
+	$response = array('prvkey' => '', 'pubkey' => '');
+
+	openssl_pkey_export($result, $response['prvkey']);
+
+	// Get public key
+	$pkey = openssl_pkey_get_details($result);
+	$response['pubkey'] = $pkey["key"];
+
+	return $response;
+
+}
+