public static KdcHelloResponse Decode(byte[] message)
{
var obj = SksAsn1Parser.Parse(message);
var set = (List <object>)obj;
var users = new List <User>();
foreach (var sequenceObj in set)
{
var sequence = (List <object>)sequenceObj;
var ip = (string)sequence[0];
var port = (string)sequence[1];
var name = (string)sequence[2];
var key = (byte[])sequence[3];
var pass = (string)sequence[4];
var user = new User
{
Password = pass,
Key = key,
Name = name,
IpAddress = ip,
Port = port,
};
users.Add(user);
}
return(new KdcHelloResponse
{
Users = users,
});
}
public static Akep2Message3 FromString(string str, byte[] longTermKey)
{
var contentBytes = PemParser.GetMessageContentBytes(str);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var iv = (byte[])contentObjectsList[0];
var encryptedPart = (byte[])contentObjectsList[1];
var hmacPart = (byte[])contentObjectsList[2];
var myHmac = SksHmac.Hash(longTermKey, encryptedPart);
if (!Utils.CompareByteArrays(hmacPart, myHmac))
{
Logger.Log("AKEP2MESSAGE2:", "Hmac doesn't match");
return(null);
}
var decryptedSequence = SksAes.DecryptBytesFromBytes_Aes(encryptedPart, longTermKey, iv);
contentObjectsList = (List <object>)SksAsn1Parser.Parse(decryptedSequence);
var a = (string)contentObjectsList[0];
var nonceB = (byte[])contentObjectsList[1];
return(new Akep2Message3(a, nonceB, longTermKey));
}
public static Akep2Message1 FromString(string str)
{
var contentBytes = PemParser.GetMessageContentBytes(str);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var nonceA = (byte[])contentObjectsList[0];
return(new Akep2Message1(nonceA));
}
public static ChatMessage FromString(string str)
{
var contentBytes = PemParser.GetMessageContentBytes(str);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var iv = (byte[])contentObjectsList[0];
var encryptedmessageBytes = (byte[])contentObjectsList[1];
var hmacBytes = (byte[])contentObjectsList[2];
return(new ChatMessage(iv, encryptedmessageBytes, hmacBytes));
}
public static HandshakeMessage2 FromString(string str)
{
var contentBytes = PemParser.GetMessageContentBytes(str);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var protocolId = (ProtocolType)(int)contentObjectsList[0];
//var ttps = (List<string>) contentObjectsList[1];
// todo: add TTPs
return(new HandshakeMessage2(protocolId, null));
}
public static HandshakeMessage1 FromString(string str)
{
var contentBytes = PemParser.GetMessageContentBytes(str);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var a = (string)contentObjectsList[0];
var b = (string)contentObjectsList[1];
var keyId = (byte[])contentObjectsList[2];
var passwordId = (byte[])contentObjectsList[3];
// todo: add TTPs
return(new HandshakeMessage1(a, b, keyId, passwordId, null));
}
public void ParseTest5AnybodyThere()
{
// 30 13 02 01 05 16 0e 41 6e 79 62 6f 64 79 20 74 68 65 72 65 3f - 5 anybody there?
var message = new byte[] { 0x10, 0x13, 0x02, 0x01, 0x05, 0x13, 0x0e, 0x41, 0x6e, 0x79, 0x62, 0x6f, 0x64, 0x79, 0x20, 0x74, 0x68, 0x65, 0x72, 0x65, 0x3f, };
var obj = SksAsn1Parser.Parse(message);
var objList = (List <object>)obj;
var number = (int)objList[0];
var str = (string)objList[1];
Assert.AreEqual(5, number);
Assert.AreEqual("Anybody there?", str);
}
public void ParseTestKdcSample()
{
// kdc sample message
var message = new byte[] { 0x17, 0x2B, 0x10, 0x29, 0x13, 0x0F, 0x31, 0x31, 0x31, 0x2E, 0x31, 0x31, 0x31, 0x2E, 0x31, 0x31, 0x31, 0x2E, 0x31, 0x31, 0x31, 0x02, 0x01, 0x05, 0x13, 0x0e, 0x41, 0x6e, 0x79, 0x62, 0x6f, 0x64, 0x79, 0x20, 0x74, 0x68, 0x65, 0x72, 0x65, 0x3f, 0x04, 0x00, 0x13, 0x01, 65, };
var obj = SksAsn1Parser.Parse(message);
var set = (List <object>)obj;
var sequence = (List <object>)set[0];
var ip = (string)sequence[0];
var number = (int)sequence[1];
var str = (string)sequence[2];
var b = (byte[])sequence[3];
var str2 = (string)sequence[4];
Assert.AreEqual("111.111.111.111", ip);
Assert.AreEqual(5, number);
Assert.AreEqual("Anybody there?", str);
CollectionAssert.AreEqual(new byte[] {}, b);
Assert.AreEqual("A", str2);
}
public static KdcHelloResponse FromString(string message, byte[] kdcKey)
{
var contentBytes = PemParser.GetMessageContentBytes(message);
var contentObjectsList = (List <object>)SksAsn1Parser.Parse(contentBytes);
var iv = (byte[])contentObjectsList[0];
var encryptedPart = (byte[])contentObjectsList[1];
var decryptedSequence = SksAes.DecryptBytesFromBytes_Aes(encryptedPart, kdcKey, iv);
contentObjectsList = (List <object>)SksAsn1Parser.Parse(decryptedSequence);
var users = new List <User>();
foreach (var sequenceObj in contentObjectsList)
{
var sequence = (List <object>)sequenceObj;
var ip = (string)sequence[0];
var port = (string)sequence[1];
var name = (string)sequence[2];
var key = (byte[])sequence[3];
var pass = (string)sequence[4];
var user = new User
{
Password = pass,
Key = key,
Name = name,
IpAddress = ip,
Port = port,
};
users.Add(user);
}
return(new KdcHelloResponse
{
Users = users,
});
}
