Posted in PHP onAugust 02, 2018
本文实例讲述了PHP实现的AES加密、解密封装类与用法。分享给大家供大家参考,具体如下:
<?php /** * Class AES * 用于AES加解密数据 * time:2018-04-27 */ class AES { protected $cipher = MCRYPT_RIJNDAEL_256; //AES加密算法 protected $mode = MCRYPT_MODE_CBC; //采用cbc加密模式 protected $key; //密钥 protected $iv; //cbc模式加密向量,如为空将采用密钥代替 /** * AES constructor. * * @param $key 密钥 * @param null $iv 向量 可选 如为空将采用密钥代替 * * @throws Exception */ public function __construct($key, $iv = NULL) { if (!extension_loaded("mcrypt")) { // throw new \Exception("mcrypt extension do not exist. it was DEPRECATED in PHP 7.1.0, and REMOVED in PHP 7.2.0. use OpenSSL instead"); } $this->key = $key; $this->iv = $iv; } /** * 加密数据 * @param $data * * @return string */ public function encrypt($data) { $td = mcrypt_module_open($this->cipher, '', $this->mode, ''); $key = hash("sha256", $this->key, true); $iv = isset($this->iv) ? hash("sha256", $this->iv, true) : $key; $data = $this->padding($data); mcrypt_generic_init($td, $key, $iv); $encryptedData = base64_encode(mcrypt_generic($td, $data)); mcrypt_generic_deinit($td); mcrypt_module_close($td); return $encryptedData; } /** * 解密数据 * @param $data * * @return bool|string */ public function decrypt($data) { $td = mcrypt_module_open($this->cipher, '', $this->mode, ''); $key = hash("sha256", $this->key, true); $iv = isset($this->iv) ? hash("sha256", $this->iv, true) : $key; mcrypt_generic_init($td, $key, $iv); $decrypted_data = mdecrypt_generic($td, base64_decode($data)); mcrypt_generic_deinit($td); mcrypt_module_close($td); return $this->unPadding($decrypted_data); } /** * 填充数据到分组大小的整数倍 * @param null $data * * @return string */ protected function padding($data = null) { $blockSize = 32; //MCRYPT_RIJNDAEL_256算法的分组大小是32字节 $pad = $blockSize - (strlen($data) % $blockSize); return $data . str_repeat(chr($pad), $pad); } /** * 去掉填充的数据 * @param null $data * * @return bool|string */ protected function unPadding($data = null) { $pad = ord($data[strlen($data) - 1]); if ($pad > strlen($data)) { return false; } if (strspn($data, chr($pad), strlen($data) - $pad) != $pad) { return false; } return substr($data, 0, -1 * $pad); } /** * @return mixed */ public function getSecretKey() { return $this->key; } /** * @param mixed $key */ public function setSecretKey($key) { $this->key = $key; } /** * @return null */ public function getIv() { return $this->iv; } /** * @param null $iv */ public function setIv($iv) { $this->iv = $iv; } } //使用方法: $keyStr = 'sq8f77fwhksk'; $aes = new AES($keyStr); $str = '3water.com'; $chgstr = $aes->encrypt($str); echo $chgstr; echo "<br/>"; $rstr = $aes->decrypt($chgstr); echo $rstr; ?>
运行结果:
pDyiRRNaxlss2b6SgoiVPdkD2m1QWhX393lh2iFgGdY=
3water.com
PHP实现的AES加密、解密封装类与用法示例
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