PullMsgResult ProduceReady(ref Msg msg)
{
int metadataLength = BasicPropertiesLength;
Span <byte> readyNonce = stackalloc byte[Curve25519XSalsa20Poly1305.NonceLength];
byte[] readyPlaintext = new byte[metadataLength];
// Create Box [metadata](S'->C')
AddBasicProperties(readyPlaintext);
ReadyNoncePrefix.CopyTo(readyNonce);
NetworkOrderBitsConverter.PutUInt64(m_nonce, readyNonce.Slice(16));
msg.InitPool(14 + Curve25519XSalsa20Poly1305.TagLength + metadataLength);
var readyBox = msg.Slice(14);
Assumes.NotNull(m_box);
m_box.Encrypt(readyBox, readyPlaintext, readyNonce);
Array.Clear(readyPlaintext, 0, readyPlaintext.Length);
Span <byte> ready = msg;
ReadyLiteral.CopyTo(ready);
// Short nonce, prefixed by "CurveZMQREADY---"
readyNonce.Slice(16).CopyTo(ready.Slice(6));
m_nonce++;
return(0);
}
PushMsgResult ProcessReady(ref Msg msg)
{
if (msg.Size < 30)
{
return(PushMsgResult.Error);
}
Span <byte> readyNonce = stackalloc byte[Curve25519XSalsa20Poly1305.NonceLength];
var readyPlaintext = new byte[msg.Size - 14 - Curve25519XSalsa20Poly1305.TagLength];
Span <byte> readyBox = msg.Slice(14);
ReadyNoncePrefix.CopyTo(readyNonce);
msg.Slice(6, 8).CopyTo(readyNonce.Slice(16));
m_peerNonce = NetworkOrderBitsConverter.ToUInt64(msg, 6);
bool isDecrypted = m_box.TryDecrypt(readyPlaintext, readyBox, readyNonce);
if (!isDecrypted)
{
return(PushMsgResult.Error);
}
if (!ParseMetadata(readyPlaintext))
{
return(PushMsgResult.Error);
}
Array.Clear(readyPlaintext, 0, readyPlaintext.Length);
m_state = State.Connected;
return(PushMsgResult.Ok);
}