php function clusters of mcrypt_ start deprecated in version 7.1.0 and 7.2.0 versions completely discarded. If the current project there is the latest version mcrypt_ encrypt this function and want to update php
The official recommended openssl_encrypt / openssl_decrypt alternative mcrypt_ the encrypt and mcrypt_ the decrypt
MCRYPT_RIJNDAEL_256 not AES-256, if you want to use mcrypt_ clusters to achieve AES-256, then you should use MCRYPT_RIJNDAEL_128 algorithm + 32-bit key, openssl_ cluster is more clearly defined the various modes. Here I compiled a correspondence relationship for your reference:
MCRYPT_RIJNDAEL_128 & CBC + 16位Key = openssl_encrypt(AES-128-CBC, 16位Key) = AES-128 MCRYPT_RIJNDAEL_128 & CBC + 24位Key = openssl_encrypt(AES-192-CBC, 24位Key) = AES-192 MCRYPT_RIJNDAEL_128 & CBC + 32位Key = openssl_encrypt(AES-256-CBC, 32位Key) = AES-256
We are here to write an example
mcrypt Code:
<?php $key = 'keykeykey'; // Note that I use the 32-bit key $key = md5(md5($key) . 'salt'); $iv = md5($key, true); $data = 'asdfgh'; $encode = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CFB, $iv); $encode = base64_encode($encode); echo $encode . PHP_EOL; // decryption processing $decode = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($encode), MCRYPT_MODE_CFB, $iv); echo $decode; echo PHP_EOL;
openssl Code
$key = 'keykeykey'; $key = md5(md5($key) . 'salt'); $iv = md5($key, true); $data = 'asdfgh'; $encode = openssl_encrypt($data, 'aes-256-cfb', $key, OPENSSL_RAW_DATA, $iv); //完美替换$encode = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CFB, $iv); $encode = base64_encode($encode); echo $encode . '<br>'; // decryption $decode = openssl_decrypt(base64_decode($encode), 'aes-256-cfb', $key, OPENSSL_RAW_DATA, $iv); echo $decode;
Openssl focus is here, I am using aes-256-cfb (because there mcrypt using a 32-bit key, if it is a 16-bit key, please refer to the correspondence between the above)