<?php
/**
- * @copyright Copyright (C) 2020, Friendica
+ * @copyright Copyright (C) 2010-2021, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
namespace Friendica\Util;
+use Exception;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\DI;
+use ParagonIE\ConstantTime\Base64UrlSafe;
use phpseclib\Crypt\RSA;
use phpseclib\Math\BigInteger;
{
$rsa = new RSA();
$rsa->loadKey([
- 'e' => new BigInteger($e, 256),
- 'n' => new BigInteger($m, 256)
- ]);
+ 'e' => new BigInteger($e, 256),
+ 'n' => new BigInteger($m, 256)
+ ]);
return $rsa->getPublicKey();
}
*/
public static function rsaToPem(string $key)
{
- $publicKey = new RSA();
- $publicKey->setPublicKey($key);
+ $rsa = new RSA();
+ $rsa->setPublicKey($key);
- return $publicKey->getPublicKey(RSA::PUBLIC_FORMAT_PKCS8);
+ return $rsa->getPublicKey(RSA::PUBLIC_FORMAT_PKCS8);
}
/**
*/
public static function pemToMe(string $key, &$modulus, &$exponent)
{
- $publicKey = new RSA();
- $publicKey->loadKey($key);
- $publicKey->setPublicKey();
+ $rsa = new RSA();
+ $rsa->loadKey($key);
+ $rsa->setPublicKey();
- $modulus = $publicKey->modulus->toBytes();
- $exponent = $publicKey->exponent->toBytes();
+ $modulus = $rsa->modulus->toBytes();
+ $exponent = $rsa->exponent->toBytes();
}
/**
return $response;
}
+ /**
+ * Create a new elliptic curve key pair
+ *
+ * @return array with the elements "prvkey", "pubkey", "vapid-public" and "vapid-private"
+ */
+ public static function newECKeypair()
+ {
+ $openssl_options = [
+ 'curve_name' => 'prime256v1',
+ 'private_key_type' => OPENSSL_KEYTYPE_EC
+ ];
+
+ $conf = DI::config()->get('system', 'openssl_conf_file');
+ if ($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-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 $iv A non-NULL Initialization Vector.
- *
+ *
* @return string|boolean Encrypted string or false on failure.
*/
private static function encryptAES256CBC($data, $key, $iv)
/**
* 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)