public void WriteTo(BufRef writer)
{
writer.Write(TestNonce);
writer.Write(AliceIPAddrSize);
writer.Write(AliceIPAddr);
writer.Write(AlicePort);
writer.Write(IntroKey);
}
public void WriteTo(BufRef dest)
{
LastSent.SetNow();
++SendCount;
if (BufBase.SameBuffer(Buf, Data))
{
dest.Write(Buf);
}
else
{
dest.Write(Buf);
dest.Write(Data);
}
}
public override void Append(BufRef writer)
{
writer.Write8((byte)(0x80 | (FragmentNumber << 1) | (LastFragment ? 0x01 : 0x00)));
writer.Write32(SourceMessage.Header.MessageId);
writer.WriteFlip16((ushort)SourceMessageData.Length);
writer.Write(SourceMessageData);
}
public virtual void Append(BufRef writer)
{
switch (SourceMessage.Delivery)
{
case TunnelMessage.DeliveryTypes.Local:
writer.Write8((byte)((byte)TunnelMessage.DeliveryTypes.Local | (Fragmented ? 0x08 : 0)));
if (Fragmented)
{
writer.Write32(SourceMessage.Header.MessageId);
}
writer.WriteFlip16((ushort)SourceMessageData.Length);
writer.Write(SourceMessageData);
break;
case TunnelMessage.DeliveryTypes.Router:
writer.Write8((byte)((byte)TunnelMessage.DeliveryTypes.Router | (Fragmented ? 0x08 : 0)));
writer.Write(((TunnelMessageRouter)SourceMessage).Destination.Hash);
if (Fragmented)
{
writer.Write32(SourceMessage.Header.MessageId);
}
writer.WriteFlip16((ushort)SourceMessageData.Length);
writer.Write(SourceMessageData);
break;
case TunnelMessage.DeliveryTypes.Tunnel:
writer.Write8((byte)((byte)TunnelMessage.DeliveryTypes.Tunnel | (Fragmented ? 0x08 : 0)));
writer.Write32(((TunnelMessageTunnel)SourceMessage).Tunnel);
writer.Write(((TunnelMessageTunnel)SourceMessage).Destination.Hash);
if (Fragmented)
{
writer.Write32(SourceMessage.Header.MessageId);
}
writer.WriteFlip16((ushort)SourceMessageData.Length);
writer.Write(SourceMessageData);
break;
default:
throw new NotImplementedException();
}
}
internal static void Receive(DHHandshakeContext context, BufLen datastart)
{
var origbuf = new BufRefLen(datastart);
var reader = new BufRefLen(datastart);
context.Dectryptor.ProcessBytes(datastart);
var rilen = reader.ReadFlip16();
var ribuf = reader.ReadBufRefLen(rilen);
context.TimestampA = reader.ReadFlip32();
#if LOG_ALL_TRANSPORT
DebugUtils.Log("SessionConfirmA recv TimestampA: " + (I2PDate.RefDate.AddSeconds(context.TimestampA).ToString()));
DebugUtils.Log("SessionConfirmA recv TimestampB: " + (I2PDate.RefDate.AddSeconds(context.TimestampB).ToString()));
#endif
context.RemoteRI = new I2PRouterIdentity(ribuf);
context.RunContext.RemoteRouterIdentity = context.RemoteRI;
var sizeofpayload = 2 + rilen + 4 + context.RemoteRI.Certificate.SignatureLength;
var paddingsize = BufUtils.Get16BytePadding(sizeofpayload);
reader.Seek(paddingsize);
var sigstart = new BufLen(reader, 0, context.RemoteRI.Certificate.SignatureLength);
var needbytes = 2 + context.RemoteRI.Certificate.RouterIdentitySize + 4 + context.RemoteRI.Certificate.SignatureLength;
needbytes += BufUtils.Get16BytePadding(needbytes);
var writer = new BufRef(origbuf, origbuf.Length);
var gotbytes = writer - origbuf;
if (gotbytes < needbytes)
{
#if LOG_ALL_TRANSPORT
DebugUtils.Log("SessionConfirmA recv not enough data: " + datastart.Length.ToString() + ". I want " + needbytes.ToString() + " bytes.");
#endif
var buf = context.Client.BlockReceive(needbytes - gotbytes);
writer.Write(buf);
}
if (needbytes - datastart.Length > 0)
{
context.Dectryptor.ProcessBytes(new BufLen(datastart, datastart.Length, needbytes - datastart.Length));
}
var signature = new I2PSignature(new BufRefLen(sigstart), context.RemoteRI.Certificate);
if (!I2PSignature.SupportedSignatureType(context.RemoteRI.Certificate.SignatureType))
{
throw new SignatureCheckFailureException("NTCP SessionConfirmA recv not supported signature type: " +
context.RemoteRI.Certificate.SignatureType.ToString());
}
var sigok = I2PSignature.DoVerify(
context.RemoteRI.SigningPublicKey,
signature,
context.XBuf,
context.YBuf,
RouterContext.Inst.MyRouterIdentity.IdentHash.Hash,
new BufLen(BufUtils.Flip32B(context.TimestampA)),
new BufLen(BufUtils.Flip32B(context.TimestampB))
);
#if LOG_ALL_TRANSPORT
DebugUtils.Log("SessionConfirmA recv: " + context.RemoteRI.Certificate.SignatureType.ToString() +
" signature check: " + sigok.ToString() + ".");
#endif
if (!sigok)
{
throw new SignatureCheckFailureException("NTCP SessionConfirmA recv signature check fail");
}
}