/// <summary>
/// 验证请求内容是否可以解密(des)
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public static string CheckRequestBodyForDecrypt(string requestBody)
{
var body = string.Empty;
try
{
body = Encoding.UTF8.GetString(Helper.AESDecrypt(Helper.DecodeBytes(requestBody), CtripConfig.AesKey, CtripConfig.AesIv));
}
catch
{
body = "";
}
return(body);
}
public string Decrypt(string input)
{
if (input.StartsWith("non"))
{
return(input.Substring(13));
}
if (input.StartsWith("rsa"))
{
input = input.Substring(13);
input = Helper.RSADecrypt(input, this.RSAParams);
var split = input.Split(new string[] { Helper.MacSeperator }, StringSplitOptions.RemoveEmptyEntries);
var data = split[0];
var hash = split[1];
if (!Helper.RSAVerify(hash, data, this.ServerParams))
{
return("");
}
return(data);
}
else
{
input = input.Substring(13);
var buffer = new StringBuilder();
var aesChunk = input.Split(new string[] { Helper.AESChunkSeperator }, StringSplitOptions.RemoveEmptyEntries);
foreach (var item in aesChunk)
{
if (item.StartsWith(Helper.SessionKeySeperator) && item.EndsWith(Helper.SessionKeySeperator))
{
var sepLen = Helper.SessionKeySeperator.Length;
var encSession = item.Substring(sepLen, item.Length - sepLen * 2);
this.SessionKey = JsonConvert.DeserializeObject <SessionKey>(Helper.AESDecrypt(encSession, this.PhysicalKey));
continue;
}
buffer.Append(Helper.AESDecrypt(item, this.SessionKey.AESKey));
}
input = buffer.ToString();
var split = input.Split(new string[] { Helper.MacSeperator }, StringSplitOptions.RemoveEmptyEntries);
var data = split[0];
var hash = split[1];
if (!Helper.RSAVerify(hash, data, this.ServerParams))
{
return("");
}
return(data);
}
}
private void InitClient(int id, string name, string rsaParamStr, string physicalKey, string sessionStr)
{
if (!Clients.ContainsKey(id))
{
return;
}
var param = JsonConvert.DeserializeObject <RSAParameters>(rsaParamStr);
var phys = JsonConvert.DeserializeObject <AESKey>(physicalKey);
var sessionKey = JsonConvert.DeserializeObject <SessionKey>(Helper.AESDecrypt(sessionStr, phys));
var cl = Clients[id];
cl.Name = name;
cl.RSAParameters = param;
cl.PhysicalKey = phys;
cl.SessionKey = sessionKey;
foreach (var item in Clients)
{
if (item.Key != id)
{
item.Value.Send($"user{Helper.SocketMessageAttributeSeperator}{id}{Helper.SocketMessageAttributeSeperator}{name}");
cl.Send($"user{Helper.SocketMessageAttributeSeperator}{item.Key}{Helper.SocketMessageAttributeSeperator}{item.Value.Name}");
}
}
}