PHP7.1后，mcrypt_decrypt加解密废弃了，以前项目使用的是mcrypt加密的，现在换成openssl，不能得到相同的密文，大侠帮忙看一下，哪个地方配置错了。

    $str = 'oJrPejuwDI0yQnz1PVPEpqoRHWQ8';
    $key = base64_decode('TMCKn1LCSPeWo9m79qQ73IF/unFhdMxw1');
    $Encr = new AesCryptUtil();
    $en1 = $Encr::mcryptEncrypt($str,$key);
    $en2 = $Encr::opensslEncrypt($str,$key);

    $den1= $Encr::mcryptDecrypt($en1,$key);
    $den2= $Encr::opensslDecrypt($en2,$key);
    echo "加密前数据：".$str."\r\n";
    echo "Encrypt加密后数据：".$en1."\r\n";
    echo "Decrypt解密的数据：".$den1."\r\n";
    echo "openssl加密后数据：".$en2."\r\n";
    echo "openssl解密的数据：".$den2."\r\n";



    class AesCryptUtil{
        private static $key = 'VE1DS24xTENTUGVXbzltNzlxUTczSUYvdW5GaGRNeHc=';
        /**
         * [encrypt description]
         * 使用mcrypt库进行加密
         * @param  [type] $input
         * @param  [type] $key
         * @return [type]
         */
        public static function mcryptEncrypt($input, $key) {
            $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
            $input = self::pkcs5Pad($input, $size);
            $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
            $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);//MCRYPT_DEV_URANDOM
            mcrypt_generic_init($td, $key, $iv);
            $data = mcrypt_generic($td, $input);
            mcrypt_generic_deinit($td);
            mcrypt_module_close($td);
            $data = base64_encode($data);
            return $data;
        }
        /**
         * [pkcs5Pad description]
         * @param  [type] $text
         * @param  [type] $blocksize
         * @return [type]
         */
        private static function pkcs5Pad($text, $blocksize) {
            $pad = $blocksize - (strlen($text) % $blocksize);
            return $text . str_repeat(chr($pad), $pad);
        }
        /**
         * [decrypt description]
         * 使用mcrypt库进行解密
         * @param  [type] $sStr
         * @param  [type] $sKey
         * @return [type]
         */
        public static function mcryptDecrypt($sStr, $sKey) {
            $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);//MCRYPT_DEV_URANDOM
            $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $sKey, base64_decode($sStr), MCRYPT_MODE_ECB, $iv);
            $dec_s = strlen($decrypted);
            $padding = ord($decrypted[$dec_s-1]);
            $decrypted = substr($decrypted, 0, -$padding);
            return $decrypted;
        }
        /**
         * [opensslDecrypt description]
         * 使用openssl库进行加密
         * @param  [type] $sStr
         * @param  [type] $sKey
         * @return [type]
         */
        public static function opensslEncrypt($sStr, $sKey, $method = 'AES-128-ECB'){
            $str = openssl_encrypt($sStr,$method,$sKey);
            return $str;
        }
        /**
         * [opensslDecrypt description]
         * 使用openssl库进行解密
         * @param  [type] $sStr
         * @param  [type] $sKey
         * @return [type]
         */
        public static function opensslDecrypt($sStr, $sKey, $method = 'AES-128-ECB'){
            $str = openssl_decrypt($sStr,$method,$sKey);
            return $str;
        }
    }

运行后的结果如下：

加密前数据：oJrPejuwDI0yQnz1PVPEpqoRHWQ8
Encrypt加密后数据：r0d668uEQfHeeNjfH6bsu8c/sMWeoD9GB8vLLuDQv3k=
Decrypt解密的数据：oJrPejuwDI0yQnz1PVPEpqoRHWQ8
openssl加密后数据：kcRSH49Gi5plcNrIqR53N6ZX5llo07V0EgllUaRnAKo=
openssl解密的数据：oJrPejuwDI0yQnz1PVPEpqoRHWQ8

运行后两种方法加密的结果不一样，但是各自都能解密。由于接口已经固定，所有现在需要使用openssl 加密的密文和mcrypt加密后的一致，所以只能调整openssl的加密了