public override void Begin()
{
SelectedNounce = "arne"; // Guid.NewGuid().ToString();
string Request = "n,,n=" + MyJID.GetUsername() + ",r=" + SelectedNounce;
/*char[] outArray = new char[1024];
* int nrTotal = Convert.ToBase64CharArray(tempbuff, 0, offset, outArray, 0);
* string EncodedResponse = new string(outArray, 0, nrTotal);*/
Request = Convert.ToBase64String(Encoding.UTF8.GetBytes((Request)),
Base64FormattingOptions.None);
string AuthXML = string.Empty;
AuthXML += "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='SCRAM-SHA-1'>"; // << std::endl;
AuthXML += Request;
AuthXML += "</auth>";
Uplink.WriteTextToSocket(AuthXML);
}
public override void Begin()
{
string ManagedString_authid = MyJID.GetUsername();
string ManagedString_authzid = "";
byte [] tempbuff = new byte[1024];
int offset = 0;
byte[] authzid = Encoding.UTF8.GetBytes(ManagedString_authzid);
byte[] authid = Encoding.UTF8.GetBytes(ManagedString_authid);
byte[] password = Encoding.UTF8.GetBytes(Password);
memcpy(tempbuff, offset, authzid, authzid.Length);
offset += authzid.Length;
tempbuff[offset++] = 0;
memcpy(tempbuff, offset, authid, authid.Length);
offset += authid.Length;
tempbuff[offset++] = 0;
memcpy(tempbuff, offset, password, password.Length);
offset += password.Length;
char[] outArray = new char[1024];
int nrTotal = Convert.ToBase64CharArray(tempbuff, 0, offset, outArray, 0);
string EncodedResponse = new string(outArray, 0, nrTotal);
string AuthXML = string.Empty;
AuthXML += "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>"; // << std::endl;
AuthXML += EncodedResponse;
AuthXML += "</auth>";
//std::string blaha = AuthXML.str();
Uplink.WriteTextToSocket(AuthXML);
}
public override void Challenge(XElement Challenge)
{
//string ChallengeBase64 = "cj1hcm5lV21qejZsQkI5ZmxjUWtld09rWnNYQT09LHM9ZEVPaUhHaC9KRVRIc2xKcGZVY2FBZz09LGk9NDA5Ng=="; //Challenge.Value;
string ChallengeBase64 = Challenge.Value;
string DecodedChallenge = Encoding.UTF8.GetString(
Convert.FromBase64String(ChallengeBase64));
string[] SplittedChallenge = DecodedChallenge.Split(',');
Dictionary <string, string> ChallengeMap = new Dictionary <string, string>();
foreach (string str in SplittedChallenge)
{
string[] SplittedSplit = str.Split(new char[] { '=' }, 2);
ChallengeMap[SplittedSplit[0]] = SplittedSplit[1];
}
string r = ChallengeMap["r"];
string s = ChallengeMap["s"];
string i = ChallengeMap["i"];
int NrNrIterations = Convert.ToInt32(i);
string n = MyJID.GetUsername();
byte[] SaltBytes = new byte[1024];
byte[] DecodedS = Convert.FromBase64String(s);
memcpy(SaltBytes, 0, DecodedS, DecodedS.Length);
SaltBytes[DecodedS.Length] = 0;
SaltBytes[DecodedS.Length + 1] = 0;
SaltBytes[DecodedS.Length + 2] = 0;
SaltBytes[DecodedS.Length + 3] = 1;
string c = "biws";
HMACSHA1 hmacFromPassword = new HMACSHA1(Encoding.UTF8.GetBytes(Password));
byte[] Result = hmacFromPassword.ComputeHash(SaltBytes, 0, DecodedS.Length + 4);
byte[] Previous = (byte[])Result.Clone();
for (int j = 1; j < NrNrIterations; j++)
{
byte[] tmp = hmacFromPassword.ComputeHash(Previous);
for (int k = 0; k < tmp.Length; k++)
{
Result[k] = (byte)(Result[k] ^ tmp[k]);
Previous[k] = tmp[k];
}
}
HMACSHA1 hmacFromSaltedPassword = new HMACSHA1(Result);
byte[] ClientKey = hmacFromSaltedPassword.ComputeHash(Encoding.UTF8.GetBytes("Client Key"));
SHA1 hash = SHA1.Create();
byte[] StoredKey = hash.ComputeHash(ClientKey);
string AuthMessage = string.Format("n={0},r={1},{2},c={3},r={4}",
n,
SelectedNounce,
DecodedChallenge,
c,
r);
HMACSHA1 hmacFromStoredKey = new HMACSHA1(StoredKey);
byte[] ClientSignature = hmacFromStoredKey.ComputeHash(Encoding.UTF8.GetBytes(AuthMessage));
byte[] ClientProof = new byte[ClientSignature.Length];
for (int k = 0; k < ClientSignature.Length; k++)
{
ClientProof[k] = (byte)(ClientKey[k] ^ ClientSignature[k]);
}
byte[] ServerKey = hmacFromSaltedPassword.ComputeHash(Encoding.UTF8.GetBytes("Server Key"));
HMACSHA1 hmacFromServerKey = new HMACSHA1(ServerKey);
byte[] ServerSignature = hmacFromServerKey.ComputeHash(Encoding.UTF8.GetBytes(AuthMessage));
ServerProof = Convert.ToBase64String(ServerSignature, Base64FormattingOptions.None);
string proof = Convert.ToBase64String(ClientProof, Base64FormattingOptions.None);
string InnerResponse = string.Format("c={0},r={1},p={2}", c, r, proof);
string Base64InnerResponse = Convert.ToBase64String(Encoding.UTF8.GetBytes(InnerResponse));
string Response = string.Format("<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>{0}</response>", Base64InnerResponse);
Uplink.WriteTextToSocket(Response);
}
