<?php
/**
- * @file src/Util/Crypto.php
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
*/
+
namespace Friendica\Util;
-use Friendica\Core\Config;
+use Exception;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\System;
-use ASN_BASE;
-use ASNValue;
+use Friendica\DI;
+use ParagonIE\ConstantTime\Base64UrlSafe;
+use phpseclib\Crypt\RSA;
+use phpseclib\Math\BigInteger;
/**
- * @brief Crypto class
+ * Crypto class
*/
class Crypto
{
}
/**
- * @param string $Der der formatted string
- * @param bool $Private key type optional, default false
- * @return string
- */
- private static function DerToPem($Der, $Private = false)
- {
- //Encode:
- $Der = base64_encode($Der);
- //Split lines:
- $lines = str_split($Der, 65);
- $body = implode("\n", $lines);
- //Get title:
- $title = $Private ? 'RSA PRIVATE KEY' : 'PUBLIC KEY';
- //Add wrapping:
- $result = "-----BEGIN {$title}-----\n";
- $result .= $body . "\n";
- $result .= "-----END {$title}-----\n";
-
- return $result;
- }
-
- /**
- * @param string $Der der formatted string
- * @return string
- */
- private static function DerToRsa($Der)
- {
- //Encode:
- $Der = base64_encode($Der);
- //Split lines:
- $lines = str_split($Der, 64);
- $body = implode("\n", $lines);
- //Get title:
- $title = 'RSA PUBLIC KEY';
- //Add wrapping:
- $result = "-----BEGIN {$title}-----\n";
- $result .= $body . "\n";
- $result .= "-----END {$title}-----\n";
-
- return $result;
- }
-
- /**
- * @param string $Modulus modulo
- * @param string $PublicExponent exponent
- * @return string
- */
- private static function pkcs8Encode($Modulus, $PublicExponent)
- {
- //Encode key sequence
- $modulus = new ASNValue(ASNValue::TAG_INTEGER);
- $modulus->SetIntBuffer($Modulus);
- $publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
- $publicExponent->SetIntBuffer($PublicExponent);
- $keySequenceItems = [$modulus, $publicExponent];
- $keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
- $keySequence->SetSequence($keySequenceItems);
- //Encode bit string
- $bitStringValue = $keySequence->Encode();
- $bitStringValue = chr(0x00) . $bitStringValue; //Add unused bits byte
- $bitString = new ASNValue(ASNValue::TAG_BITSTRING);
- $bitString->Value = $bitStringValue;
- //Encode body
- $bodyValue = "\x30\x0d\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01\x05\x00" . $bitString->Encode();
- $body = new ASNValue(ASNValue::TAG_SEQUENCE);
- $body->Value = $bodyValue;
- //Get DER encoded public key:
- $PublicDER = $body->Encode();
- return $PublicDER;
- }
-
- /**
- * @param string $Modulus modulo
- * @param string $PublicExponent exponent
- * @return string
- */
- private static function pkcs1Encode($Modulus, $PublicExponent)
- {
- //Encode key sequence
- $modulus = new ASNValue(ASNValue::TAG_INTEGER);
- $modulus->SetIntBuffer($Modulus);
- $publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
- $publicExponent->SetIntBuffer($PublicExponent);
- $keySequenceItems = [$modulus, $publicExponent];
- $keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
- $keySequence->SetSequence($keySequenceItems);
- //Encode bit string
- $bitStringValue = $keySequence->Encode();
- return $bitStringValue;
- }
-
/**
* @param string $m modulo
* @param string $e exponent
*/
public static function meToPem($m, $e)
{
- $der = self::pkcs8Encode($m, $e);
- $key = self::DerToPem($der, false);
- return $key;
+ $rsa = new RSA();
+ $rsa->loadKey([
+ 'e' => new BigInteger($e, 256),
+ 'n' => new BigInteger($m, 256)
+ ]);
+ return $rsa->getPublicKey();
}
/**
- * @param string $key key
- * @param string $m modulo reference
- * @param object $e exponent reference
- * @return void
- * @throws \Exception
- */
- private static function pubRsaToMe($key, &$m, &$e)
- {
- $lines = explode("\n", $key);
- unset($lines[0]);
- unset($lines[count($lines)]);
- $x = base64_decode(implode('', $lines));
-
- $r = ASN_BASE::parseASNString($x);
-
- $m = Strings::base64UrlDecode($r[0]->asnData[0]->asnData);
- $e = Strings::base64UrlDecode($r[0]->asnData[1]->asnData);
- }
-
- /**
- * @param string $key key
- * @return string
- * @throws \Exception
+ * Transform RSA public keys to standard PEM output
+ *
+ * @param string $key A RSA public key
+ *
+ * @return string The PEM output of this key
*/
- public static function rsaToPem($key)
+ public static function rsaToPem(string $key)
{
- self::pubRsaToMe($key, $m, $e);
- return self::meToPem($m, $e);
- }
+ $rsa = new RSA();
+ $rsa->setPublicKey($key);
- /**
- * @param string $key key
- * @return string
- * @throws \Exception
- */
- private static function pemToRsa($key)
- {
- self::pemToMe($key, $m, $e);
- return self::meToRsa($m, $e);
+ return $rsa->getPublicKey(RSA::PUBLIC_FORMAT_PKCS8);
}
/**
- * @param string $key key
- * @param string $m modulo reference
- * @param string $e exponent reference
+ * Extracts the modulo and exponent reference from a public PEM key
+ *
+ * @param string $key public PEM key
+ * @param string $modulus (ref) modulo reference
+ * @param string $exponent (ref) exponent reference
+ *
* @return void
- * @throws \Exception
*/
- public static function pemToMe($key, &$m, &$e)
+ public static function pemToMe(string $key, &$modulus, &$exponent)
{
- $lines = explode("\n", $key);
- unset($lines[0]);
- unset($lines[count($lines)]);
- $x = base64_decode(implode('', $lines));
+ $rsa = new RSA();
+ $rsa->loadKey($key);
+ $rsa->setPublicKey();
- $r = ASN_BASE::parseASNString($x);
-
- $m = Strings::base64UrlDecode($r[0]->asnData[1]->asnData[0]->asnData[0]->asnData);
- $e = Strings::base64UrlDecode($r[0]->asnData[1]->asnData[0]->asnData[1]->asnData);
- }
-
- /**
- * @param string $m modulo
- * @param string $e exponent
- * @return string
- */
- private static function meToRsa($m, $e)
- {
- $der = self::pkcs1Encode($m, $e);
- $key = self::DerToRsa($der);
- return $key;
+ $modulus = $rsa->modulus->toBytes();
+ $exponent = $rsa->exponent->toBytes();
}
/**
'encrypt_key' => false
];
- $conf = Config::get('system', 'openssl_conf_file');
+ $conf = DI::config()->get('system', 'openssl_conf_file');
if ($conf) {
$openssl_options['config'] = $conf;
}
$result = openssl_pkey_new($openssl_options);
if (empty($result)) {
- Logger::log('new_keypair: failed');
+ Logger::notice('new_keypair: failed');
return false;
}
}
/**
- * Encrypt a string with 'aes-256-cbc' cipher method.
- *
- * Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/include/crypto.php
- *
- * @param string $data
- * @param string $key The key used for encryption.
- * @param string $iv A non-NULL Initialization Vector.
- *
- * @return string|boolean Encrypted string or false on failure.
+ * Create a new elliptic curve key pair
+ *
+ * @return array with the elements "prvkey", "pubkey", "vapid-public" and "vapid-private"
*/
- private static function encryptAES256CBC($data, $key, $iv)
+ public static function newECKeypair()
{
- return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
- }
+ $openssl_options = [
+ 'curve_name' => 'prime256v1',
+ 'private_key_type' => OPENSSL_KEYTYPE_EC
+ ];
- /**
- * Decrypt a string with 'aes-256-cbc' cipher method.
- *
- * Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/include/crypto.php
- *
- * @param string $data
- * @param string $key The key used for decryption.
- * @param string $iv A non-NULL Initialization Vector.
- *
- * @return string|boolean Decrypted string or false on failure.
- */
- private static function decryptAES256CBC($data, $key, $iv)
- {
- return openssl_decrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
+ $conf = DI::config()->get('system', 'openssl_conf_file');
+ if ($conf) {
+ $openssl_options['config'] = $conf;
+ }
+ $result = openssl_pkey_new($openssl_options);
+
+ if (empty($result)) {
+ throw new Exception('Key creation failed');
+ }
+
+ $response = ['prvkey' => '', 'pubkey' => ''];
+
+ // Get private key
+ openssl_pkey_export($result, $response['prvkey']);
+
+ // Get public key
+ $pkey = openssl_pkey_get_details($result);
+ $response['pubkey'] = $pkey['key'];
+
+ // Create VAPID keys
+ // @see https://github.com/web-push-libs/web-push-php/blob/256a18b2a2411469c94943725fb6eccb9681bd75/src/Utils.php#L60-L62
+ $hexString = '04';
+ $hexString .= str_pad(bin2hex($pkey['ec']['x']), 64, '0', STR_PAD_LEFT);
+ $hexString .= str_pad(bin2hex($pkey['ec']['y']), 64, '0', STR_PAD_LEFT);
+ $response['vapid-public'] = Base64UrlSafe::encode(hex2bin($hexString));
+
+ // @see https://github.com/web-push-libs/web-push-php/blob/256a18b2a2411469c94943725fb6eccb9681bd75/src/VAPID.php
+ $response['vapid-private'] = Base64UrlSafe::encode(hex2bin(str_pad(bin2hex($pkey['ec']['d']), 64, '0', STR_PAD_LEFT)));
+
+ return $response;
}
/**
- * Encrypt a string with 'aes-256-ctr' cipher method.
- *
+ * Encrypt a string with 'aes-256-cbc' cipher method.
+ *
* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/include/crypto.php
- *
+ *
* @param string $data
* @param string $key The key used for encryption.
* @param string $iv A non-NULL Initialization Vector.
- *
+ *
* @return string|boolean Encrypted string or false on failure.
*/
- private static function encryptAES256CTR($data, $key, $iv)
+ private static function encryptAES256CBC($data, $key, $iv)
{
- $key = substr($key, 0, 32);
- $iv = substr($iv, 0, 16);
- return openssl_encrypt($data, 'aes-256-ctr', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
+ return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
- * Decrypt a string with 'aes-256-ctr' cipher method.
- *
+ * Decrypt a string with 'aes-256-cbc' cipher method.
+ *
* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/include/crypto.php
- *
+ *
* @param string $data
* @param string $key The key used for decryption.
* @param string $iv A non-NULL Initialization Vector.
- *
+ *
* @return string|boolean Decrypted string or false on failure.
*/
- private static function decryptAES256CTR($data, $key, $iv)
+ private static function decryptAES256CBC($data, $key, $iv)
{
- $key = substr($key, 0, 32);
- $iv = substr($iv, 0, 16);
- return openssl_decrypt($data, 'aes-256-ctr', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
+ return openssl_decrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
}
/**
private static function encapsulateOther($data, $pubkey, $alg)
{
if (!$pubkey) {
- Logger::log('no key. data: '.$data);
+ Logger::notice('no key. data: '.$data);
}
$fn = 'encrypt' . strtoupper($alg);
if (method_exists(__CLASS__, $fn)) {
// log the offending call so we can track it down
if (!openssl_public_encrypt($key, $k, $pubkey)) {
$x = debug_backtrace();
- Logger::log('RSA failed. ' . print_r($x[0], true));
+ Logger::notice('RSA failed', ['trace' => $x[0]]);
}
$result['alg'] = $alg;
private static function encapsulateAes($data, $pubkey)
{
if (!$pubkey) {
- Logger::log('aes_encapsulate: no key. data: ' . $data);
+ Logger::notice('aes_encapsulate: no key. data: ' . $data);
}
$key = random_bytes(32);
// log the offending call so we can track it down
if (!openssl_public_encrypt($key, $k, $pubkey)) {
$x = debug_backtrace();
- Logger::log('aes_encapsulate: RSA failed. ' . print_r($x[0], true));
+ Logger::notice('aes_encapsulate: RSA failed.', ['data' => $x[0]]);
}
$result['alg'] = 'aes256cbc';
return;
}
- $alg = ((array_key_exists('alg', $data)) ? $data['alg'] : 'aes256cbc');
+ $alg = $data['alg'] ?? 'aes256cbc';
if ($alg === 'aes256cbc') {
- return self::encapsulateAes($data['data'], $prvkey);
+ return self::unencapsulateAes($data['data'], $prvkey);
}
- return self::encapsulateOther($data['data'], $prvkey, $alg);
+
+ return self::unencapsulateOther($data, $prvkey, $alg);
}
/**
projects / friendica.git / blobdiff