public void Proccess(IWeChatMsgToken token, string appid)
{
var xmlMsg = string.Empty;
var crypt = new WXBizMsgCrypt(token, appid);
var rtnVal = crypt.DecryptMsg(token, ref xmlMsg);
if (rtnVal == 0)
{
Logger.InfoFormat("result:{0}", xmlMsg);
var document = new XmlDocument();
document.LoadXml(xmlMsg);
if (Enum.TryParse(document.SelectSingleNode("/xml/MsgType").InnerText,
out WeChatMsgTypes msgType))
{
using (var reader = new StringReader(xmlMsg))
{
if (Enum.TryParse(document.SelectSingleNode("/xml/Event").InnerText, true, out WeChatEventTypes eventtype) == false)
{
eventtype = WeChatEventTypes.Nothing;
}
var message = xmlMsg.DeserializeFromXml(dictnoary[eventtype]) as IWeChatMsg;
var invoking = GenernateWeChatProccesor(message);
invoking(message, appid);
}
}
}
else
{
Logger.InfoFormat("解密错误:{0}", rtnVal);
}
}
//构造函数
// @param sToken: 公众平台上，开发者设置的Token
// @param sEncodingAESKey: 公众平台上，开发者设置的EncodingAESKey
// @param sAppID: 公众帐号的appid
public WXBizMsgCrypt(IWeChatMsgToken token, string appid = "")
{
this.token = token;
this.AppId = appid;
//m_sToken = token.BizMsgToken;
//m_sAppID = token.AppId;
//m_sEncodingAESKey = token.EncodingAESKey;
}
// 检验消息的真实性，并且获取解密后的明文
// @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 sPostData: 密文，对应POST请求的数据
// @param sMsg: 解密后的原文，当return返回0时有效
// @return: 成功0，失败返回对应的错误码
public int DecryptMsg(IWeChatMsgToken token, ref string sMsg)
{
if (token.EncodingAESKey.Length != 43)
{
return((int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_IllegalAesKey);
}
XmlDocument doc = new XmlDocument();
XmlNode root;
string sEncryptMsg;
try
{
doc.LoadXml(token.ReqMsg);
root = doc.FirstChild;
sEncryptMsg = root["Encrypt"].InnerText;
}
catch (Exception ex)
{
return((int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ParseXml_Error);
}
//verify signature
int ret = 0;
ret = VerifySignature(token.BizMsgToken, token.TimeStamp, token.Nonce, sEncryptMsg, token.Signature);
if (ret != 0)
{
return(ret);
}
//decrypt
string cpid = "";
try
{
sMsg = Cryptography.AES_decrypt(sEncryptMsg, token.EncodingAESKey, ref cpid);
}
catch (FormatException)
{
return((int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecodeBase64_Error);
}
catch (Exception)
{
return((int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecryptAES_Error);
}
//// P1 需要验证appid 是否在平台 appid中
//if (token.AppIds.Any(id => id.Equals(cpid)) == false)
// return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ValidateAppid_Error;
//token.CurrentAppId = cpid;
return(0);
}
