解密php 7.2中的数据，使用AES在php 5.6中加密

Question

I used a following method to Encrypt and Decrypt data between a php application and android app, It was working fine in php 5.6, After upgrading to php 7.2 it stopped working, Now I have moved back to php 5.6 temporarily. I know php mcrypt is depreciated. Now my problem is I cannot give update to Android App, I have to fix this somehow in the server side, I have predefined key and iv , Both in server side as well as app, What do I do so that I can use same key and iv and encrypt and decrypt data on sever side in php 7.2. Thanks in advance

 class MCrypt
        {
                private $key = 'Some Key'; 
                private $iv = 'Some IV'; 


                function __construct()
                {
                }

                function encrypt($str) {

                  //$key = $this->hex2bin($key);    
                  $iv = $this->iv;

                  $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);

                  mcrypt_generic_init($td, $this->key, $iv);
                  $encrypted = mcrypt_generic($td, $str);

                  mcrypt_generic_deinit($td);
                  mcrypt_module_close($td);

                  return bin2hex($encrypted);
                }

                function decrypt($code) {
                  //$key = $this->hex2bin($key);
                  $code = $this->hex2bin($code);
                  $iv = $this->iv;

                  $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);

                  mcrypt_generic_init($td, $this->key, $iv);
                  $decrypted = mdecrypt_generic($td, $code);

                  mcrypt_generic_deinit($td);
                  mcrypt_module_close($td);

                  return utf8_encode(trim($decrypted));
                }

                protected function hex2bin($hexdata) {
                  $bindata = '';

                  for ($i = 0; $i < strlen($hexdata); $i += 2) {
                        $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
                  }

                  return $bindata;
                }

        }

Answer 1

mcrypt is deprecated in 7.2 and is not included by default. However, you can still install mcrypt manually if you'd like. You could also use openssl_encrypt() and openssl_decrypt() instead.