internal static void Receive(DHHandshakeContext context, I2PKeysAndCert ri)
{
var responselength = ri.Certificate.SignatureLength;
responselength += BufUtils.Get16BytePadding(responselength);
var data = context.Client.BlockReceive(responselength);
context.Dectryptor.ProcessBytes(data);
var signature = new I2PSignature(new BufRefLen(data), context.RemoteRI.Certificate);
if (!I2PSignature.SupportedSignatureType(context.RemoteRI.Certificate.SignatureType))
{
throw new SignatureCheckFailureException("NTCP SessionConfirmB recv not supported signature type: " +
context.RemoteRI.Certificate.SignatureType.ToString());
}
var ok = I2PSignature.DoVerify(context.RemoteRI.SigningPublicKey, signature,
context.X.Key,
context.Y.Key,
RouterContext.Inst.MyRouterIdentity.IdentHash.Hash,
BufUtils.Flip32BL(context.TimestampA),
BufUtils.Flip32BL(context.TimestampB));
#if LOG_ALL_TRANSPORT
DebugUtils.Log("SessionConfirmB: " + context.RemoteRI.Certificate.SignatureType.ToString() + " signature check: " + ok.ToString());
#endif
if (!ok)
{
throw new SignatureCheckFailureException("NTCP SessionConfirmB recv sig check failure");
}
}
internal static BufLen Send(DHHandshakeContext context)
{
context.TimestampA = (uint)Math.Ceiling((DateTime.UtcNow - I2PDate.RefDate).TotalSeconds);
var cleartext = new List <byte>();
var ri = RouterContext.Inst.MyRouterIdentity.ToByteArray();
cleartext.AddRange(BufUtils.Flip16B((ushort)ri.Length));
cleartext.AddRange(ri);
cleartext.AddRange(BufUtils.Flip32B(context.TimestampA));
#if LOG_ALL_TRANSPORT
DebugUtils.Log("SessionConfirmA send TimestampA: " + (I2PDate.RefDate.AddSeconds(context.TimestampA).ToString()));
DebugUtils.Log("SessionConfirmA send TimestampB: " + (I2PDate.RefDate.AddSeconds(context.TimestampB).ToString()));
#endif
var sign = I2PSignature.DoSign(RouterContext.Inst.PrivateSigningKey,
context.X.Key,
context.Y.Key,
context.RemoteRI.IdentHash.Hash,
BufUtils.Flip32BL(context.TimestampA),
BufUtils.Flip32BL(context.TimestampB));
var padsize = BufUtils.Get16BytePadding(sign.Length + cleartext.Count);
cleartext.AddRange(BufUtils.Random(padsize));
cleartext.AddRange(sign);
var buf = new BufLen(cleartext.ToArray());
context.Encryptor.ProcessBytes(buf);
return(buf);
}
internal static BufLen Send(DHHandshakeContext context)
{
context.TimestampA = (uint)Math.Ceiling((DateTime.UtcNow - I2PDate.RefDate).TotalSeconds);
var cleartext = new BufRefStream();
var ri = RouterContext.Inst.MyRouterIdentity.ToByteArray();
cleartext.Write(BufUtils.Flip16B((ushort)ri.Length));
cleartext.Write(ri);
cleartext.Write(BufUtils.Flip32B(context.TimestampA));
Logging.LogDebugData($"SessionConfirmA send TimestampA: {I2PDate.RefDate.AddSeconds( context.TimestampA )}");
Logging.LogDebugData($"SessionConfirmA send TimestampB: {I2PDate.RefDate.AddSeconds( context.TimestampB )}");
var sign = I2PSignature.DoSign(RouterContext.Inst.PrivateSigningKey,
context.X.Key,
context.Y.Key,
context.RemoteRI.IdentHash.Hash,
BufUtils.Flip32BL(context.TimestampA),
BufUtils.Flip32BL(context.TimestampB));
var padsize = BufUtils.Get16BytePadding((int)(sign.Length + cleartext.Length));
cleartext.Write(BufUtils.RandomBytes(padsize));
cleartext.Write(sign);
var buf = new BufLen(cleartext.ToArray());
context.Encryptor.ProcessBytes(buf);
return(buf);
}
public void Write(BufRefStream dest)
{
Delivery.Write(dest);
dest.Write((BufRefLen)BufUtils.Flip32BL(CloveId));
Expiration.Write(dest);
dest.Write(ThreeZero);
}
public Garlic(I2PDate expiration, IEnumerable <GarlicClove> cloves)
{
BufRefStream buf = new BufRefStream();
buf.Write((byte)cloves.Count());
foreach (var clove in cloves)
{
clove.Write(buf);
}
// Certificate
buf.Write(new byte[] { 0, 0, 0 });
buf.Write((BufRefLen)BufUtils.Flip32BL(BufUtils.RandomUint()));
expiration.Write(buf);
Data = new BufLen(buf.ToArray());
ParseData(new BufRefLen(Data));
}
public Garlic(I2PDate expiration, IEnumerable <GarlicClove> cloves)
{
List <byte> buf = new List <byte>();
buf.Add((byte)cloves.Count());
foreach (var clove in cloves)
{
clove.Write(buf);
}
// Certificate
buf.Add(0);
buf.Add(0);
buf.Add(0);
buf.AddRange(BufUtils.Flip32BL(BufUtils.RandomUint()));
expiration.Write(buf);
Data = new BufLen(buf.ToArray());
ParseData(new BufRefLen(Data));
}
internal static byte[] Send(DHHandshakeContext context)
{
var msglen = RouterContext.Inst.MyRouterIdentity.Certificate.SignatureLength;
msglen += BufUtils.Get16BytePadding(msglen);
var writer = new BufRefLen(new byte[msglen]);
var SigBuf = I2PSignature.DoSign(RouterContext.Inst.PrivateSigningKey,
context.XBuf,
context.YBuf,
context.RemoteRI.IdentHash.Hash,
BufUtils.Flip32BL(context.TimestampA),
BufUtils.Flip32BL(context.TimestampB));
writer.Write(SigBuf);
writer.Write(BufUtils.RandomBytes(writer.Length));
writer.Reset();
context.Encryptor.ProcessBytes((BufLen)writer);
return(writer.ToByteArray());
}