public byte[] CalculateHa2(ByteArrayPart qop, ByteArrayPart digestUri, ByteArrayPart method, ArraySegment <byte> body)
{
byte[] bodyHash = null;
// if (messageQop.IsValid == true && messageQop.IsEqualValue(AuthInt))
if (qop.Equals(AuthInt))
{
if (body.Array != null && body.Count > 0)
{
bodyHash = md5.ComputeHash(body.Array, body.Offset, body.Count);
}
}
md5.Initialize();
md5.TransformBlock(method);
md5.TransformBlock(Colon);
if (bodyHash != null)
{
md5.TransformBlock(digestUri);
md5.TransformBlock(Colon);
HexEncoding.GetLowerHexChars(bodyHash, bytes32);
md5.TransformFinalBlock(bytes32);
}
else
{
md5.TransformFinalBlock(digestUri);
}
return(md5.Hash);
}
public byte[] CalculateResponse(ByteArrayPart nonce, ByteArrayPart qop,
ByteArrayPart nonceCountBytes, ByteArrayPart cnonce, byte[] ha1, byte[] ha2)
{
md5.Initialize();
HexEncoding.GetLowerHexChars(ha1, bytes32);
md5.TransformBlock(bytes32);
md5.TransformBlock(Colon);
md5.TransformBlock(nonce);
md5.TransformBlock(Colon);
if (qop.IsValid)
{
md5.TransformBlock(nonceCountBytes);
md5.TransformBlock(Colon);
md5.TransformBlock(cnonce);
md5.TransformBlock(Colon);
md5.TransformBlock(qop);
md5.TransformBlock(Colon);
}
HexEncoding.GetLowerHexChars(ha2, bytes32);
md5.TransformFinalBlock(bytes32);
return(md5.Hash);
}
//public bool IsResponseValid(ByteArrayPart username, ByteArrayPart realm,
// bool isMd5SessAlgorithm, ByteArrayPart nonce, ByteArrayPart cnonce,
// ByteArrayPart qop, ByteArrayPart digestUri, ByteArrayPart nonceCountBytes,
// ByteArrayPart method, ArraySegment<byte> body, ByteArrayPart password)
//{
// byte[] ha1 = CalculateHa1(username, realm, isMd5SessAlgorithm, nonce, cnonce, password);
// byte[] ha2 = CalculateHa2(qop, digestUri, method, body);
// byte[] response = CalculateResponse(nonce, qop, nonceCountBytes, cnonce, ha1, ha2);
// HexEncoding.GetLowerHexChars(response, bytes32); // ?? что если ответ будет в upper case
// return cred.Response.Equals(bytes32);
//}
public byte[] GetResponseHexChars(ByteArrayPart username, ByteArrayPart realm,
bool isMd5SessAlgorithm, ByteArrayPart nonce, ByteArrayPart cnonce,
ByteArrayPart qop, ByteArrayPart digestUri, ByteArrayPart nonceCountBytes,
ByteArrayPart method, ArraySegment <byte> body, ByteArrayPart password)
{
byte[] ha1 = CalculateHa1(username, realm, isMd5SessAlgorithm, nonce, cnonce, password);
byte[] ha2 = CalculateHa2(qop, digestUri, method, body);
byte[] response = CalculateResponse(nonce, qop, nonceCountBytes, cnonce, ha1, ha2);
HexEncoding.GetLowerHexChars(response, bytes32); // ?? что если ответ будет в upper case
return(bytes32);
}
public byte[] GetResponseHexChars(ByteArrayPart username, ByteArrayPart realm, bool isMd5SessAlgorithm,
ByteArrayPart nonce, int cnonce, int nonceCount, ByteArrayPart password,
ByteArrayPart qop, ByteArrayPart digestUri, ByteArrayPart method, ArraySegment <byte> body)
{
var bytes24 = new byte[24];
var nonceCountBytes = GetDigitChars(bytes24, nonceCount, 15);
HexEncoding.GetLowerHexChars(cnonce, bytes24, 16);
var cnonceBytes = new ByteArrayPart()
{
Bytes = bytes24, Begin = 16, End = 24,
};
byte[] ha1 = CalculateHa1(username, realm, isMd5SessAlgorithm, nonce, cnonceBytes, password);
byte[] ha2 = CalculateHa2(qop, digestUri, method, body);
byte[] response = CalculateResponse(nonce, qop, nonceCountBytes, cnonceBytes, ha1, ha2);
HexEncoding.GetLowerHexChars(response, bytes32);
return(bytes32);
}
private readonly int remoteCseq; // why readonly ?!
public Dialog(SipMessageReader request, int localTag, ConnectionAddresses connectionAddresses)
{
this.transport = connectionAddresses.Transport;
this.localEndPoint = connectionAddresses.LocalEndPoint;
this.remoteEndPoint = connectionAddresses.RemoteEndPoint;
localCseq = 0;
remoteCseq = request.CSeq.Value;
int length = Calculate(request, out routeCount) + 8;
bytes = new byte[length];
marker1 = bytes.CopyFrom(request.CallId, 0);
HexEncoding.GetLowerHexChars(localTag, bytes, marker1);
marker2 = marker1 + 8;
marker3 = bytes.CopyFrom(request.From.Tag, marker2);
marker4 = bytes.CopyFrom(request.To.AddrSpec.Value, marker3);
marker5 = bytes.CopyFrom(request.From.AddrSpec.Value, marker4);
marker6 = bytes.CopyFrom(request.From.Epid, marker5);
markerN = bytes.CopyFrom(request.Contact[0].AddrSpec.Value, marker6);
CopyRecordRoute(request);
}
