as2252258@163.com
100 lines
1.7 KiB
PHP
100 lines
1.7 KiB
PHP
<?php
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namespace wchat\common;
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class Decode
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{
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private $sessionKey;
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private $iv;
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private $encryptedData;
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private $appId;
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private $OK = 0;
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private $IllegalAesKey = -41001;
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private $IllegalIv = -41002;
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private $IllegalBuffer = -41003;
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private $DecodeBase64Error = -41004;
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/**
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* @param mixed $sessionKey
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* @return Decode
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*/
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public function setSessionKey($sessionKey)
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{
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$this->sessionKey = $sessionKey;
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return $this;
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}
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/**
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* @param mixed $iv
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* @return Decode
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*/
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public function setIv($iv)
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{
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$this->iv = $iv;
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return $this;
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}
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/**
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* @param mixed $encryptedData
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* @return Decode
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*/
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public function setEncryptedData($encryptedData)
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{
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$this->encryptedData = $encryptedData;
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return $this;
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}
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/**
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* @param mixed $appId
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* @return Decode
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*/
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public function setAppId($appId)
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{
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$this->appId = $appId;
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return $this;
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}
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/**
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* @param $asArray
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* @return array|mixed
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* @throws \Exception
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*/
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public function decode($asArray)
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{
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if (strlen($this->sessionKey) != 24) {
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throw new \Exception('encodingAesKey 非法', $this->IllegalAesKey);
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}
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$aesKey = base64_decode($this->sessionKey);
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if (strlen($this->iv) != 24) {
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throw new \Exception('base64解密失败', $this->IllegalIv);
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}
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$aesIV = base64_decode($this->iv);
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$aesCipher = base64_decode($this->encryptedData);
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$result = openssl_decrypt($aesCipher, "AES-128-CBC", $aesKey, OPENSSL_RAW_DATA, $aesIV);
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if ($result === false) {
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throw new \Exception('aes 解密失败', $this->IllegalBuffer);
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}
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$dataObj = json_decode($result);
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if ($dataObj->watermark->appid != $this->appId) {
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throw new \Exception('aes 解密失败', $this->IllegalBuffer);
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}
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if ($asArray) {
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return get_object_vars($dataObj);
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}
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return $dataObj;
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}
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}
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