邢栋博客

<?php
    class McryptModel
    {
        protected $td = '';
        protected $iv = '';
        protected $key = '';
        private static $instance = null;

        private function __construct($cipher,$mode,$key)
        {
            $this->cipher = $cipher;
            $this->mode = $mode;
            $this->key = $key;
        }

        public static function getInstance($cipher=MCRYPT_RIJNDAEL_128,$mode=MCRYPT_MODE_CBC,$key='xingdong365')
        {
            if(self::$instance === null){
                self::$instance = new self($cipher,$mode,$key);
            }
            return self::$instance;
        }

        public function encrypt($str)
        {
            $td = mcrypt_module_open($this->cipher,'',$this->mode,'');//打开算法模块
            $this->td = $td;
            $iv_size = mcrypt_enc_get_iv_size($td);//获取向量大小
            $iv = mcrypt_create_iv($iv_size,MCRYPT_RAND);//初始化向量
            $this->iv = $iv;
            $num = mcrypt_generic_init($td,$this->key,$iv);//初始化加密空间
            $encrypt = mcrypt_generic($td,$str);//执行加密
            mcrypt_generic_deinit($td);//结束加密，执行清理工作
            return base64_encode($encrypt);
        }

        public function decrypt($str)
        {
            $str = base64_decode($str);
            $td = $this->td;
            mcrypt_generic_init($td,$this->key,$this->iv);
            $decrypt = mdecrypt_generic($td,$str);
            mcrypt_generic_deinit($td);
            mcrypt_module_close($td);//关闭算法模块
            return $decrypt;
        }
    }

    $m = McryptModel::getInstance();
    echo $e = $m->encrypt('hello');
    echo "<hr>";
    echo $m->decrypt($e);

    //des加密
    function des_encrypt($encrypt, $key='xingdong365'){
        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_DES,MCRYPT_MODE_ECB),MCRYPT_RAND);
        $passcrypt = mcrypt_encrypt(MCRYPT_DES ,$key, $encrypt, MCRYPT_MODE_ECB, $iv);
        $resturn = base64_encode($passcrypt);
        return $resturn;
    }

    //des解密
    function des_decrypt($decrypt, $key='xingdong365'){
        $decoded = base64_decode($decrypt);
        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_DES,MCRYPT_MODE_ECB),MCRYPT_RAND);
        $resturn = mcrypt_decrypt(MCRYPT_DES ,$key, $decoded, MCRYPT_MODE_ECB, $iv);
        return $resturn;
    }