Prpcrypt.php
1.5 KB
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<?php
namespace wxapp\aes;
/**
* Prpcrypt class
*
*
*/
class Prpcrypt
{
public $key;
public function __construct($k)
{
$this->key = $k;
}
/**
* 对密文进行解密
* @param string $aesCipher 需要解密的密文
* @param string $aesIV 解密的初始向量
* @return string 解密得到的明文
*/
public function decrypt($aesCipher, $aesIV)
{
if (function_exists('openssl_decrypt')) {
$decrypted = openssl_decrypt($aesCipher, 'AES-128-CBC', $this->key, OPENSSL_RAW_DATA, $aesIV);
if ($decrypted === false) return [ErrorCode::$IllegalBuffer, null];
} else if (function_exists('mcrypt_module_open')) {
try {
$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
mcrypt_generic_init($module, $this->key, $aesIV);
//解密
$decrypted = mdecrypt_generic($module, $aesCipher);
mcrypt_generic_deinit($module);
mcrypt_module_close($module);
} catch (\Exception $e) {
return [ErrorCode::$IllegalBuffer, null];
}
}
try {
//去除补位字符
$pkc_encoder = new PKCS7Encoder;
$result = $pkc_encoder->decode($decrypted);
} catch (\Exception $e) {
//print $e;
return [ErrorCode::$IllegalBuffer, null];
}
return [0, $result];
}
}