public static byte[] VerificationScript(this ECDsa key)
{
byte[] owner = new byte[35]; // version? + key + checksig
owner[0] = 0x21; // version?
owner[34] = 0xac; // checksig
key.Peer().CopyTo(owner, 1);
return(owner);
}
public static void SignHeader(this IMessage req, ECDsa key, bool debug = false)
{
RequestMetaHeader meta = null;
{ // save old meta header
if (req is IMeta m)
{
meta = m.Meta;
m.Meta = new RequestMetaHeader();
}
}
if (req is IVerify v)
{
if (v.Verify == null)
{
v.Verify = new RequestVerificationHeader();
}
var data = req.SignMessage(key, debug);
if (debug)
{
Console.WriteLine("Hash = {0}", data.ToHex());
}
var sign = new Signature
{
Sign = new Sign
{
Peer = ByteString.CopyFrom(key.Peer()),
Sign_ = ByteString.CopyFrom(data),
}
};
v.Verify.AddSignature(sign);
}
{ // restore meta header
if (req is IMeta m && meta != null)
{
m.Meta = meta;
}
}
}
public static async Task <Token> EstablishSession(this Channel chan, byte[] oid, uint ttl, ECDsa key, bool debug = false)
{
var tkn = new Session.SessionClient(chan).Create();
// Prepare Session and Token:
var publey = ByteString.CopyFrom(key.Peer());
var owner = ByteString.CopyFrom(key.Address());
var empty = new byte[0];
var token = new Token
{
OwnerID = owner,
LastEpoch = ulong.MaxValue,
FirstEpoch = ulong.MinValue,
// empty TokenID
ID = ByteString.CopyFrom(new byte[16]),
// initialize verification header
Header = new VerificationHeader
{
PublicKey = ByteString.CopyFrom(empty),
KeySignature = ByteString.CopyFrom(empty),
},
};
// Set Owner ID:
token.PublicKeys.Add(publey);
// Set Object ID:
token.ObjectID.Add(ByteString.CopyFrom(oid));
// Send token to node
await tkn.RequestStream.WriteAsync(token.PrepareInit(ttl, key, debug));
// Wait to complete request
await tkn.ResponseStream.MoveNext();
// Receive session token
var response = tkn.ResponseStream.Current;
if (!response.Unsigned.IsSame(token))
{
throw new Exception("wrong token received");
}
// Sign received token
token = response.Unsigned;
token.Sign(key);
// Send signed token
await tkn.RequestStream.WriteAsync(token.PrepareSigned(ttl, key, debug));;
// Wait to complete request
await tkn.ResponseStream.MoveNext();
await tkn.RequestStream.CompleteAsync();
// Store received token:
return(tkn.ResponseStream.Current.Result);
}