mirror of
https://gitee.com/zoujingli/WeChatDeveloper.git
synced 2025-04-06 03:58:03 +08:00
99 lines
3.1 KiB
PHP
99 lines
3.1 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | WeChatDeveloper
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// +----------------------------------------------------------------------
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// | 版权所有 2014~2022 广州楚才信息科技有限公司 [ http://www.cuci.cc ]
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// +----------------------------------------------------------------------
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// | 官方网站: https://thinkadmin.top
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// +----------------------------------------------------------------------
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// | 开源协议 ( https://mit-license.org )
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// +----------------------------------------------------------------------
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// | github开源项目：https://github.com/zoujingli/WeChatDeveloper
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// +----------------------------------------------------------------------
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namespace WeChat\Prpcrypt;
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/**
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* 公众号消息 - 加解密
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* Class Prpcrypt
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*/
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class Prpcrypt
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{
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public $key;
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/**
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* Prpcrypt constructor.
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* @param $key
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*/
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function __construct($key)
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{
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$this->key = base64_decode("{$key}=");
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}
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/**
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* 对明文进行加密
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* @param string $text 需要加密的明文
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* @param string $appid 公众号APPID
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* @return array
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*/
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public function encrypt($text, $appid)
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{
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try {
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$random = $this->getRandomStr();
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$iv = substr($this->key, 0, 16);
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$pkcEncoder = new PKCS7Encoder();
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$text = $pkcEncoder->encode($random . pack("N", strlen($text)) . $text . $appid);
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$encrypted = openssl_encrypt($text, 'AES-256-CBC', substr($this->key, 0, 32), OPENSSL_ZERO_PADDING, $iv);
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return [ErrorCode::$OK, $encrypted];
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} catch (\Exception $e) {
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return [ErrorCode::$EncryptAESError, null];
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}
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}
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/**
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* 对密文进行解密
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* @param string $encrypted 需要解密的密文
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* @return array
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*/
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public function decrypt($encrypted)
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{
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try {
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$iv = substr($this->key, 0, 16);
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$decrypted = openssl_decrypt($encrypted, 'AES-256-CBC', substr($this->key, 0, 32), OPENSSL_ZERO_PADDING, $iv);
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} catch (\Exception $e) {
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return [ErrorCode::$DecryptAESError, null];
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}
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try {
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$pkcEncoder = new PKCS7Encoder();
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$result = $pkcEncoder->decode($decrypted);
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if (strlen($result) < 16) {
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return [ErrorCode::$DecryptAESError, null];
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}
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$content = substr($result, 16, strlen($result));
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$len_list = unpack("N", substr($content, 0, 4));
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$xml_len = $len_list[1];
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return [0, substr($content, 4, $xml_len), substr($content, $xml_len + 4)];
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} catch (\Exception $e) {
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return [ErrorCode::$IllegalBuffer, null];
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}
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}
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/**
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* 随机生成16位字符串
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* @param string $str
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* @return string 生成的字符串
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*/
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function getRandomStr($str = "")
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{
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$str_pol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
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$max = strlen($str_pol) - 1;
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for ($i = 0; $i < 16; $i++) {
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$str .= $str_pol[mt_rand(0, $max)];
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}
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return $str;
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}
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}
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