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[英]Decrypt data in php 7.2, which is Encrypted in php 5.6 using AES
[英]Why AES Decrypt code doesn't work in php 7.2
我使用 AES 加密从 java 发送到服务器的 post 参数。 所以我在我的服务器中使用了下面的类来解密 post 参数。
<?php
class MCrypt {
private $hex_iv = '31323334353637383930616263646566'; # converted Java byte code in to HEX and placed it here
private $key = '0FDOUZ.Qz'; #Same as in JAVA
function __construct() {
$this->key = hash('sha256', $this->key, true);
//echo $this->key.'<br/>';
}
function encrypt($str) {
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
$block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
$pad = $block - (strlen($str) % $block);
$str .= str_repeat(chr($pad), $pad);
$encrypted = mcrypt_generic($td, $str);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return base64_encode($encrypted);
}
function decrypt($code) {
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
$str = mdecrypt_generic($td, base64_decode($code));
$block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $this->strippadding($str);
}
/*
For PKCS7 padding
*/
private function addpadding($string, $blocksize = 16) {
$len = strlen($string);
$pad = $blocksize - ($len % $blocksize);
$string .= str_repeat(chr($pad), $pad);
return $string;
}
private function strippadding($string) {
$slast = ord(substr($string, -1));
$slastc = chr($slast);
$pcheck = substr($string, -$slast);
if (preg_match("/$slastc{" . $slast . "}/", $string)) {
$string = substr($string, 0, strlen($string) - $slast);
return $string;
} else {
return false;
}
}
function hexToStr($hex)
{
$string='';
for ($i=0; $i < strlen($hex)-1; $i+=2)
{
$string .= chr(hexdec($hex[$i].$hex[$i+1]));
}
return $string;
}
}
?>
我也在 newuser.php 文件中使用了下面的代码。
<?php
.....
//decrypt
$encryption = new MCrypt();
$phone= $encryption->decrypt($phoneenc);
$password= $encryption->decrypt($passwordenc);
$serialdivice= $encryption->decrypt($serialdiviceenc);
$sequretyQustion= $encryption->decrypt($sequretyQustionenc);
$sequretyAnsewr= $encryption->decrypt($sequretyAnsewrenc);
.... ?>
在将 php 更新到 php7.2 之前,我的代码运行正常。 但是现在,当我更新 php 时,解密方法会出错。 那么我该如何解决呢?
我对 java 和 php 都使用了 openssl。它现在可以正常工作了。
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