/// <summary>
/// 核心执行 过程的 验签和解密
/// </summary>
/// <param name="recXml">消息内容</param>
/// <param name="signature">微信加密签名</param>
/// <param name="timestamp">时间戳</param>
/// <param name="nonce">随机数</param>
/// <returns>验证结果及相应的消息内容体 （如果加密模式，返回的是解密后的明文）</returns>
private Resp <string> PrepareExecute(string recXml, string signature,
string timestamp, string nonce)
{
if (string.IsNullOrEmpty(recXml))
{
return(new Resp <string>().WithResp(RespTypes.ObjectNull, "接收的消息体为空！"));
}
var resCheck = WXChatHelper.CheckSignature(ApiConfig.Token, signature, timestamp, nonce);
if (!resCheck.IsSuccess())
{
return(new Resp <string>().WithResp(resCheck));// resCheck.ConvertToResult<string>();
}
if (ApiConfig.SecurityType == WXSecurityType.None)
{
return(new Resp <string>(recXml));
}
var dirs = WXChatHelper.ChangXmlToDir(recXml, out XmlDocument xmlDoc);
if (dirs == null || !dirs.TryGetValue("Encrypt", out var encryStr) ||
string.IsNullOrEmpty(encryStr))
{
return(new Resp <string>().WithResp(RespTypes.ObjectNull, "加密消息为空"));
}
var recMsgXml = Cryptography.WXAesDecrypt(encryStr, ApiConfig.EncodingAesKey);
return(new Resp <string>(recMsgXml));
}
/// <summary>
/// 核心执行 过程的 验签和解密
/// </summary>
/// <returns>验证结果及相应的消息内容体 （如果加密模式，返回的是解密后的明文）</returns>
private static StrResp Prepare(WXChatConfig appConfig, string recXml, string signature, string msg_signature,
string timestamp, string nonce)
{
var isEncryptMsg = appConfig.SecurityType == WXSecurityType.Safe;
if (!isEncryptMsg)
{
var resCheck = WXChatHelper.CheckSignature(appConfig.Token, signature, timestamp, nonce, String.Empty);
return(!resCheck.IsSuccess() ? new StrResp().WithResp(resCheck) : new StrResp(recXml));
}
if (string.IsNullOrEmpty(msg_signature))
{
return(new StrResp().WithResp(RespTypes.ParaError, "msg_signature 消息体验证签名参数为空！"));
}
var xmlDoc = WXChatHelper.GetXmlDocment(recXml);
var encryStr = xmlDoc?.FirstChild["Encrypt"]?.InnerText;
if (string.IsNullOrEmpty(encryStr))
{
return(new StrResp().WithResp(RespTypes.ObjectNull, "安全接口的加密字段为空！"));
}
var cryptMsgCheck = WXChatHelper.CheckSignature(appConfig.Token, msg_signature, timestamp, nonce, encryStr);
if (!cryptMsgCheck.IsSuccess())
{
return(new StrResp().WithResp(cryptMsgCheck));
}
var recMsgXml = Cryptography.AESDecrypt(encryStr, appConfig.EncodingAesKey);
return(new StrResp(recMsgXml));
}
/// <summary>
/// 服务器验证
/// </summary>
/// <param name="signature"></param>
/// <param name="timestamp"></param>
/// <param name="nonce"></param>
/// <param name="echostr"></param>
/// <returns></returns>
public Resp <string> CheckServerValid(string signature, string timestamp, string nonce, string echostr)
{
var checkSignRes = WXChatHelper.CheckSignature(ApiConfig.Token, signature, timestamp, nonce);
var resultRes = new Resp <string>().WithResp(checkSignRes);// checkSignRes.ConvertToResult<string>();
resultRes.data = resultRes.IsSuccess() ? echostr : string.Empty;
return(resultRes);
}