74 lines
2.8 KiB
PHP
74 lines
2.8 KiB
PHP
<?php
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/**
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* Crypt module.
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*
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* This file is part of MadelineProto.
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* MadelineProto 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.
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* MadelineProto 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.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2019 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\MTProtoTools;
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trait Crypt
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{
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public static function aesCalculate($msg_key, $auth_key, $to_server = true)
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{
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$x = $to_server ? 0 : 8;
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$sha256_a = \hash('sha256', $msg_key.\substr($auth_key, $x, 36), true);
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$sha256_b = \hash('sha256', \substr($auth_key, 40 + $x, 36).$msg_key, true);
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$aes_key = \substr($sha256_a, 0, 8).\substr($sha256_b, 8, 16).\substr($sha256_a, 24, 8);
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$aes_iv = \substr($sha256_b, 0, 8).\substr($sha256_a, 8, 16).\substr($sha256_b, 24, 8);
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return [$aes_key, $aes_iv];
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}
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public static function oldAesCalculate($msg_key, $auth_key, $to_server = true)
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{
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$x = $to_server ? 0 : 8;
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$sha1_a = \sha1($msg_key.\substr($auth_key, $x, 32), true);
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$sha1_b = \sha1(\substr($auth_key, 32 + $x, 16).$msg_key.\substr($auth_key, 48 + $x, 16), true);
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$sha1_c = \sha1(\substr($auth_key, 64 + $x, 32).$msg_key, true);
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$sha1_d = \sha1($msg_key.\substr($auth_key, 96 + $x, 32), true);
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$aes_key = \substr($sha1_a, 0, 8).\substr($sha1_b, 8, 12).\substr($sha1_c, 4, 12);
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$aes_iv = \substr($sha1_a, 8, 12).\substr($sha1_b, 0, 8).\substr($sha1_c, 16, 4).\substr($sha1_d, 0, 8);
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return [$aes_key, $aes_iv];
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}
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public static function ctrEncrypt($message, $key, $iv)
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{
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$cipher = new \phpseclib3\Crypt\AES('ctr');
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$cipher->setKey($key);
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$cipher->setIV($iv);
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return @$cipher->encrypt($message);
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}
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public static function igeEncrypt($message, $key, $iv)
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{
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$cipher = new \phpseclib3\Crypt\AES('ige');
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$cipher->setKey($key);
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$cipher->setIV($iv);
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return @$cipher->encrypt($message);
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}
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public static function igeDecrypt($message, $key, $iv)
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{
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$cipher = new \phpseclib3\Crypt\AES('ige');
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$cipher->setKey($key);
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$cipher->setIV($iv);
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return @$cipher->decrypt($message);
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}
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}
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