protected void SendChallenge(long her_flags, long our_flags, int challenge)
{
OtpOutputStream obuf = new OtpOutputStream();
string str = Local.Node;
if ((her_flags & AbstractNode.dFlagHandshake23) == 0)
{
obuf.Write2BE(1 + 2 + 4 + 4 + str.Length);
obuf.Write1('n');
obuf.Write2BE(5);
obuf.Write4BE(our_flags & 0xffffffff);
obuf.Write4BE(challenge);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
else
{
obuf.Write2BE(1 + 8 + 4 + 4 + 2 + str.Length);
obuf.Write1('N');
obuf.Write8BE(our_flags);
obuf.Write4BE(challenge);
obuf.Write4BE(Local.Creation);
obuf.Write2BE(str.Length);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallenge flags={our_flags} challenge={challenge} local={Local}");
}
}
protected int SendName(int dist, long aflags, int creation)
{
OtpOutputStream obuf = new OtpOutputStream();
string str = Local.Node;
int nameTag = (dist == 5 ? 'n' : 'N');
if (dist == 5)
{
obuf.Write2BE(1 + 2 + 4 + str.Length);
obuf.Write1(nameTag);
obuf.Write2BE(dist);
obuf.Write4BE(aflags);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
else
{
obuf.Write2BE(1 + 8 + 4 + 2 + str.Length);
obuf.Write1(nameTag);
obuf.Write8BE(aflags);
obuf.Write4BE(creation);
obuf.Write2BE(str.Length);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendName flags={aflags} dist={dist} local={Local}");
}
return(nameTag);
}
protected void SendStatus(string status)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(status.Length + 1);
obuf.Write1(ChallengeStatus);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(status));
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendStatus status={status} local={Local}");
}
}
protected void SendChallengeAck(byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(17);
obuf.Write1(ChallengeAck);
obuf.Write(digest);
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallengeAck digest={Hex(digest)} local={Local}");
}
}
protected void SendChallengeReply(int challenge, byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(21);
obuf.Write1(ChallengeReply);
obuf.Write4BE(challenge);
obuf.Write(digest);
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallengeReply challenge={challenge} digest={Hex(digest)} local={Local}");
}
}
