PHP7.1使用openssl 替换 废弃加密方法-mcrypt

最近在接入一个三方支付， 他们给的demo程序中，使用的加解密函数是通过 mcrypt 方法进行的。
而 mcrypt 在7.1 版本的时候已经被弃用， 目前使用的版本为7.2， 所以需要找到替代函数将他们替换掉。

加密函数

function encrypt($input, $key) {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
        $input = pkcs5_pad($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_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

使用openssl函数重写：

function opensslEncrypt($input, $key) {
        $data = openssl_encrypt($input,'AES-128-ECB',$key);
        return $data;
    }

解密函数

function encrypt($input, $key) {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
        $input = pkcs5_pad($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_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

使用openssl函数重写：

function opensslDecrypy($input, $key) {
        $decrypted = openssl_decrypt( $sStr, 'AES-128-ECB',$sKey);
        return $decrypted;
    }

验证测试类

$str = json_encode(['a' => 1, 'b' => 2]);
$Encr = new AesCryptUtil();
$key = 'eeqIYJna6NHfwiqi';
$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{
        /**
         * [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;
        }
    }

/*
加密前数据：{"a":1,"b":2}
Encrypt加密后数据：eVWVjTcQ0pp78DL4MrvReg==
Decrypt解密的数据：{"a":1,"b":2}
openssl加密后数据：eVWVjTcQ0pp78DL4MrvReg==
openssl解密的数据：{"a":1,"b":2}
*/