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wkcrm/extend/com/Cryptdes.php

68 lines
1.7 KiB

4 years ago
<?php
namespace com;
/**
* 对称加密解密
*/
class Cryptdes
{
// 加密方式
const METHOD = 'AES-256-CBC';
public $key;
public $error = '';
public $ivStatus;
public function __construct($key, $ivStatus = true)
{
if (!function_exists('openssl_encrypt') || !function_exists('openssl_decrypt')) {
$this->error = '未启用 openssl 扩展,请开启。';
}
$this->ivStatus = $ivStatus;
$this->key = $key;
}
/**
* 加密
*/
public function encrypt($data)
{
$str_padded = json_encode($data);
if (strlen($str_padded) % 16) {
$str_padded = str_pad($str_padded, strlen($str_padded) + 16 - strlen($str_padded) % 16, "\0");
}
if ($this->ivStatus) {
$iv = $this->makeIv();
$code = openssl_encrypt($str_padded, SELF::METHOD, $this->key, OPENSSL_NO_PADDING, $iv);
return [
'iv' => base64_encode($iv),
'code' => base64_encode($code)
];
} else {
$code = openssl_encrypt($str_padded, SELF::METHOD, $this->key, OPENSSL_NO_PADDING);
return base64_encode($code);
}
}
/**
* 解密
*/
public function decrypt($code, $iv = '')
{
$code = base64_decode($code);
$iv = base64_decode($iv);
$res = openssl_decrypt($code, SELF::METHOD, $this->key, OPENSSL_NO_PADDING, $iv);
return json_decode(trim($res), true);
}
/**
* 生成 初始化向量 iv
*/
public function makeIv()
{
$ivlen = openssl_cipher_iv_length(SELF::METHOD);
return openssl_random_pseudo_bytes($ivlen);
}
}