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50 lines
1.3 KiB
50 lines
1.3 KiB
8 months ago
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<?php
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declare (strict_types=1);
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namespace app\common\library\wxserver;
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class WxBizMsgCrypt
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{
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private string $appId;
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private string $token;
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private string $encodingAesKey;
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public function __construct(string $token, string $encodingAesKey, string $appId)
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{
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$this->token = $token;
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$this->encodingAesKey = $encodingAesKey;
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$this->appId = $appId;
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}
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/**
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* @notes:xml转数组
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* @param $xml
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* @return mixed
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* @author: wanghousheng
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*/
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public function fromXml($xml)
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{
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// 禁止引用外部xml实体
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libxml_disable_entity_loader();
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return json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
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}
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/**
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* @notes: 解密
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* @param $msg_encrypt
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* @return false|string
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* @author: wanghousheng
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*/
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public function decryptMsg($msg_encrypt)
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{
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$EncodingAESKey = $this->encodingAesKey;
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$AESKey = base64_decode($EncodingAESKey . '=');
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$iv = substr($AESKey, 0, 16);
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$msg_decode = base64_decode($msg_encrypt);
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$msg = openssl_decrypt($msg_decode, 'AES-256-CBC', $AESKey, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv);
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$msg_len = unpack('N', substr($msg, 16, 4));
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$len = $msg_len[1];
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return substr($msg, 20, $len);
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}
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}
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