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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace SpomkyLabs\Jose\Algorithm\ContentEncryption; |
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use Jose\Util\StringUtil; |
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/** |
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*/ |
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final class AESMCrypt implements AESInterface |
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{ |
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public static function encrypt($data, $k, $iv) |
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{ |
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$resource = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); |
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$padded_text = self::pad($data, 16); |
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mcrypt_generic_init($resource, $k, $iv); |
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$cipherText = mcrypt_generic($resource, $padded_text); |
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mcrypt_generic_deinit($resource); |
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return $cipherText; |
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} |
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public static function decrypt($data, $k, $iv) |
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{ |
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$resource = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); |
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mcrypt_generic_init($resource, $k, $iv); |
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$decrypted = mdecrypt_generic($resource, $data); |
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mcrypt_generic_deinit($resource); |
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$decrypted_text = self::unpad($decrypted); |
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return $decrypted_text; |
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} |
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private static function pad($data, $block_size) |
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{ |
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$padding = $block_size - (StringUtil::getStringLength($data) % $block_size); |
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$pattern = chr($padding); |
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return $data.str_repeat($pattern, $padding); |
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} |
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private static function unpad($data) |
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{ |
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$padChar = StringUtil::getSubString($data, -1); |
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$padLength = ord($padChar); |
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return StringUtil::getSubString($data, 0, -$padLength); |
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} |
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} |
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Spomky-Labs /
jose
