m_sToken = $token;
$this->m_sEncodingAesKey = $encodingAesKey;
$this->m_sReceiveId = $receiveId;
}
/*
*验证URL
*@param sMsgSignature: 签名串,对应URL参数的msg_signature
*@param sTimeStamp: 时间戳,对应URL参数的timestamp
*@param sNonce: 随机串,对应URL参数的nonce
*@param sEchoStr: 随机串,对应URL参数的echostr
*@param sReplyEchoStr: 解密之后的echostr,当return返回0时有效
*@return:成功0,失败返回对应的错误码
*/
public function VerifyURL($sMsgSignature, $sTimeStamp, $sNonce, $sEchoStr, &$sReplyEchoStr)
{
if (strlen($this->m_sEncodingAesKey) != 43) {
return ErrorCode::$IllegalAesKey;
}
$pc = new Prpcrypt($this->m_sEncodingAesKey);
//verify msg_signature
$sha1 = new SHA1;
$array = $sha1->getSHA1($this->m_sToken, $sTimeStamp, $sNonce, $sEchoStr);
$ret = $array[0];
if ($ret != 0) {
return $ret;
}
$signature = $array[1];
if ($signature != $sMsgSignature) {
return ErrorCode::$ValidateSignatureError;
}
$result = $pc->decrypt($sEchoStr, $this->m_sReceiveId);
if ($result[0] != 0) {
return $result[0];
}
$sReplyEchoStr = $result[1];
return ErrorCode::$OK;
}
/**
* 将公众平台回复用户的消息加密打包.
*
* - 对要发送的消息进行AES-CBC加密
* - 生成安全签名
* - 将消息密文和安全签名打包成xml格式
*
*
* @param $replyMsg string 公众平台待回复用户的消息,xml格式的字符串
* @param $timeStamp string 时间戳,可以自己生成,也可以用URL参数的timestamp
* @param $nonce string 随机串,可以自己生成,也可以用URL参数的nonce
* @param &$encryptMsg string 加密后的可以直接回复用户的密文,包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串,
* 当return返回0时有效
*
* @return int 成功0,失败返回对应的错误码
*/
public function EncryptMsg($sReplyMsg, $sTimeStamp, $sNonce, &$sEncryptMsg)
{
$pc = new Prpcrypt($this->m_sEncodingAesKey);
//加密
$array = $pc->encrypt($sReplyMsg, $this->m_sReceiveId);
$ret = $array[0];
if ($ret != 0) {
return $ret;
}
if ($sTimeStamp == null) {
$sTimeStamp = time();
}
$encrypt = $array[1];
//生成安全签名
$sha1 = new SHA1;
$array = $sha1->getSHA1($this->m_sToken, $sTimeStamp, $sNonce, $encrypt);
$ret = $array[0];
if ($ret != 0) {
return $ret;
}
$signature = $array[1];
//生成发送的xml
$xmlparse = new XMLParse;
$sEncryptMsg = $xmlparse->generate($encrypt, $signature, $sTimeStamp, $sNonce);
return ErrorCode::$OK;
}
/**
* 检验消息的真实性,并且获取解密后的明文.
*
* - 利用收到的密文生成安全签名,进行签名验证
* - 若验证通过,则提取xml中的加密消息
* - 对消息进行解密
*
*
* @param $msgSignature string 签名串,对应URL参数的msg_signature
* @param $timestamp string 时间戳 对应URL参数的timestamp
* @param $nonce string 随机串,对应URL参数的nonce
* @param $postData string 密文,对应POST请求的数据
* @param &$msg string 解密后的原文,当return返回0时有效
*
* @return int 成功0,失败返回对应的错误码
*/
public function DecryptMsg($sMsgSignature, $sTimeStamp = null, $sNonce, $sPostData, &$sMsg)
{
if (strlen($this->m_sEncodingAesKey) != 43) {
return ErrorCode::$IllegalAesKey;
}
$pc = new Prpcrypt($this->m_sEncodingAesKey);
//提取密文
$xmlparse = new XMLParse;
$array = $xmlparse->extract($sPostData);
$ret = $array[0];
if ($ret != 0) {
return $ret;
}
if ($sTimeStamp == null) {
$sTimeStamp = time();
}
$encrypt = $array[1];
//验证安全签名
$sha1 = new SHA1;
$array = $sha1->getSHA1($this->m_sToken, $sTimeStamp, $sNonce, $encrypt);
$ret = $array[0];
if ($ret != 0) {
return $ret;
}
$signature = $array[1];
if ($signature != $sMsgSignature) {
return ErrorCode::$ValidateSignatureError;
}
$result = $pc->decrypt($encrypt, $this->m_sReceiveId);
if ($result[0] != 0) {
return $result[0];
}
$sMsg = $result[1];
return ErrorCode::$OK;
}
}