PHP 标准AES加密算法类
分享一个标准PHP的AES加密算法类，其中mcrypt_get_block_size('rijndael-128', 'ecb');，如果在不明白原理的情况下比较容易搞错，可以通过mcrypt_list_algorithms函数查看你需要的加密算法标识。
<?php /** * AES128加解密类 * @author dy * */ defined('InEjbuy') or exit('Access Invalid!'); class Aes{ //密钥 private $_secrect_key; public function __construct(){ $this->_secrect_key = 'MYgGnQE2jDFADSFFDSEWsdD'; } /** * 加密方法 * @param string $str * @return string */ public function encrypt($str){ //AES, 128 ECB模式加密数据 $screct_key = $this->_secrect_key; $screct_key = base64_decode($screct_key); $str = trim($str); $str = $this->addPKCS7Padding($str); $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND); $encrypt_str = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv); return base64_encode($encrypt_str); } /** * 解密方法 * @param string $str * @return string */ public function decrypt($str){ //AES, 128 ECB模式加密数据 $screct_key = $this->_secrect_key; $str = base64_decode($str); $screct_key = base64_decode($screct_key); $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND); $encrypt_str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv); $encrypt_str = trim($encrypt_str); $encrypt_str = $this->stripPKSC7Padding($encrypt_str); return $encrypt_str; } /** * 填充算法 * @param string $source * @return string */ function addPKCS7Padding($source){ $source = trim($source); $block = mcrypt_get_block_size('rijndael-128', 'ecb'); $pad = $block - (strlen($source) % $block); if ($pad <= $block) { $char = chr($pad); $source .= str_repeat($char, $pad); } return $source; } /** * 移去填充算法 * @param string $source * @return string */ function stripPKSC7Padding($source){ $source = trim($source); $char = substr($source, -1); $num = ord($char); if($num==62)return $source; $source = substr($source,0,-$num); return $source; } }