Php Aes加密类程序代码共享
今天没事与了一个Php Aes加密类程序,适用于Yii的扩展如果不用在Yii框架中,把代码中Yii::app()->params[/'encryptKey/'] 换成你对应的默认key就可以了. AES加密算法 – 算法原理 AES 算法基于排列和置换运算,排列是对数据重新进行安排,置换是将一个数据单元替换为另一个,AES 使用几种不同的方法来执行排列和置换运算. AES 是一个迭代的、对称密钥分组的密码,它可以使用128、192 和 256 位密钥,并且用 128 位(16字节)分组加密和解密数据,与公共密钥密码使用密钥对不同,对称密钥密码使用相同的密钥加密和解密数据,通过分组密码返回的加密数据的位数与输入数据相同,迭代加密使用一个循环结构,在该循环中重复置换和替换输入数据,代码如下: <?php /** * php AES加解密类 * 因为java只支持128位加密,所以php也用128位加密,可以与java互转。 * 同时AES的标准也是128位。只是RIJNDAEL算法可以支持128,192和256位加密。 * * @author Terry * */ class PhpAes { /** * This was AES-128 / CBC / ZeroBytePadding encrypted. * return base64_encode string * @author Terry * @param string $plaintext * @param string $key */ public static function AesEncrypt($plaintext,$key = null) { if ($plaintext == '') return ''; if(!extension_loaded('mcrypt')) throw new CException(Yii::t('yii','AesEncrypt requires PHP mcrypt extension to be loaded in order to use data encryption feature.')); $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC); $plaintext = self::PKCS5Padding($plaintext, $size); $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); $key=self::substr($key===null ? Yii::app()->params['encryptKey'] : $key, 0, mcrypt_enc_get_key_size($module)); /* Create the IV and determine the keysize length, use MCRYPT_RAND * on Windows instead */ $iv = substr(md5($key),0,mcrypt_enc_get_iv_size($module)); /* Intialize encryption */ mcrypt_generic_init($module, $key, $iv); /* Encrypt data */ $encrypted = mcrypt_generic($module, $plaintext); /* Terminate encryption handler */ mcrypt_generic_deinit($module); mcrypt_module_close($module); return base64_encode(trim($encrypted)); } /** * This was AES-128 / CBC / ZeroBytePadding decrypted. * @author Terry * @param string $encrypted base64_encode encrypted string * @param string $key * @throws CException * @return string */ public static function AesDecrypt($encrypted, $key = null) { if ($encrypted == '') return ''; if(!extension_loaded('mcrypt')) throw new CException(Yii::t('yii','AesDecrypt requires PHP mcrypt extension to be loaded in order to use data encryption feature.')); $ciphertext_dec = base64_decode($encrypted); $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); $key=self::substr($key===null ? Yii::app()->params['encryptKey'] : $key, 0, mcrypt_enc_get_key_size($module)); $iv = substr(md5($key),0,mcrypt_enc_get_iv_size($module)); /* Initialize encryption module for decryption */ mcrypt_generic_init($module, $key, $iv); /* Decrypt encrypted string */ $decrypted = mdecrypt_generic($module, $ciphertext_dec); /* Terminate decryption handle and close module */ mcrypt_generic_deinit($module); mcrypt_module_close($module); return self::UnPKCS5Padding($decrypted); } private static function strlen($string) { return extension_loaded('mbstring') ? mb_strlen($string,'8bit') : strlen($string); } private static function substr($string,$start,$length) { return extension_loaded('mbstring') ? mb_substr($string,$start,$length,'8bit') : substr($string,$start,$length); } private static function PKCS5Padding ($text, $blocksize) { $pad = $blocksize - (self::strlen($text) % $blocksize); return $text . str_repeat(chr($pad), $pad); } private static function UnPKCS5Padding($text) { $pad = ord($text{self::strlen($text)-1}); if ($pad > self::strlen($text)) return false; if (strspn($text, chr($pad), self::strlen($text) - $pad) != $pad) return false; return substr($text, 0, -1 * $pad); } } ?> 使用方法,代码如下: <?php require_once('./AES.php'); //$aes = new AES(); $aes = new AES(true);// 把加密后的字符串按十六进制进行存储 //$aes = new AES(true,true);// 带有调试信息且加密字符串按十六进制存储 $key = "this is a 32 byte key";// 密钥 $keys = $aes->makeKey($key); $encode = "123456";// 被加密的字符串 $ct = $aes->encryptString($encode, $keys); echo "encode = ".$ct."<br>";//开源代码Cuoxin.com $cpt = $aes->decryptString($ct, $keys); echo "decode = ".$cpt; ?> (编辑:银川站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |