public void SignMessage(SipMessageWriter writer)
{
outSnum++;
int srand2 = Environment.TickCount;
InitializeThreadStaticVars();
int length = SignatureBuffer.Generate(scheme, srand2, outSnum, targetname, writer, ref bytes1);
if (bytes2.Length < maxSignatureSize)
{
bytes2 = new byte[maxSignatureSize];
}
secBufferDesc1.Buffers[0].SetBuffer(BufferType.SECBUFFER_DATA, bytes1, 0, length);
secBufferDesc1.Buffers[1].SetBuffer(BufferType.SECBUFFER_TOKEN, bytes2);
var result = Sspi.SafeMakeSignature(contextHandle, ref secBufferDesc1, 100);
Tracer.WriteInformation("Signature: " + result.ToString());
if (Sspi.Succeeded(result))
{
writer.WriteAuthenticationInfo(true, scheme, targetname, realm, Opaque, outSnum, srand2,
new ArraySegment <byte>(bytes2, 0, secBufferDesc1.Buffers[1].Size));
if (writer.IsResponse && writer.StatusCode >= 200 && writer.StatusCode <= 299)
{
if (writer.Method == Methods.Registerm && writer.Expires != int.MinValue)
{
idleTime = DateTime.UtcNow.AddSeconds(writer.Expires + 30);
idleTimeUpdatedByExpires = true;
}
}
else
{
// TODO: INVITE Session-Expires
}
}
}
public bool VerifySignature(SipMessageReader reader, Credentials credentials)
{
bool result = false;
InitializeThreadStaticVars();
int length = SignatureBuffer.Generate(scheme, credentials.Crand, credentials.Cnum, targetname, reader, ref bytes1);
secBufferDesc1.Buffers[0].SetBuffer(BufferType.SECBUFFER_DATA, bytes1, 0, length);
if (bytes2.Length < credentials.Response.Length / 2)
{
bytes2 = new byte[credentials.Response.Length];
}
if (HexEncoding.TryParseHex(credentials.Response.ToArraySegment(), bytes2) >= 0)
{
secBufferDesc1.Buffers[1].SetBuffer(BufferType.SECBUFFER_TOKEN, bytes2, 0, credentials.Response.Length / 2);
var result2 = Sspi.SafeVerifySignature(contextHandle, ref secBufferDesc1, 100);
Tracer.WriteInformation("VerifySignature: " + result2.ToString());
result = Sspi.Succeeded(result2);
}
{
//if (auth.Cnum > _LastCnum + SlidingWindowSize || auth.Cnum < _LastCnum - SlidingWindowSize || auth.Cnum == 0)
// // cnum в не скользящего окна
// throw new AuthenticationManager.MessageDiscardException();
//// индекс верхней границы скользящего окна
//int index = auth.Cnum >= SlidingWindowSize ? (auth.Cnum - SlidingWindowSize) % SlidingWindowSize : auth.Cnum - 1;
//if (auth.Cnum > _LastCnum)
//{
// // индекс нижней границы скользящего окна
// int lindex = _LastCnum >= SlidingWindowSize ? (_LastCnum - SlidingWindowSize + 1) % SlidingWindowSize : _LastCnum;
// // смещение скользящего окна
// if (lindex > index)
// {
// while (lindex < SlidingWindowSize)
// _SlidingWindow[lindex++] = false;
// lindex = 0;
// }
// while (lindex < index)
// _SlidingWindow[lindex++] = false;
// _LastCnum = auth.Cnum;
//}
//else
//{
// if (_SlidingWindow[index] == true)
// // дублирование cnum
// throw new AuthenticationManager.MessageDiscardException();
//}
//_SlidingWindow[index] = true;
// удаление обработанного поля заголовка
//message.Header.Headers[message.Header.FindHeaderIndex(auth_name, auth_index)].IsRemoved = true;
//message.Verified = true;
}
if (idleTimeUpdatedByExpires == false)
{
idleTime = DateTime.UtcNow.AddMinutes(IdleMinutes);
}
return(result);
}
