private byte[] GetAvatarHash(Stream stream)
{
var buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
return(ToxTools.Hash(buffer));
}
public void TestToxHash()
{
byte[] data = new byte[0xBEEF];
new Random().NextBytes(data);
byte[] hash = ToxTools.Hash(data);
}
public bool HashMatches(int friendNumber, byte[] hash)
{
byte[] avatar = GetAvatar(friendNumber);
if (avatar == null)
{
return(false);
}
return(ToxTools.Hash(avatar).SequenceEqual(hash));
}
public void SendAvatar(int friendNumber, byte[] avatar)
{
//cancel any existing avatar file transfers with this friend first
for (int i = _transfers.Count() - 1; i >= 0; i--)
{
//reverse loop to be able to delete entries while iterating through them, fun stuff
var entry = _transfers.ElementAt(i);
if (entry.Key.FriendNumber == friendNumber && entry.Key.Direction == FileTransferDirection.Outgoing)
{
CancelTransfer(entry.Key);
}
}
var error = ToxErrorFileSend.Ok;
ToxFileInfo fileInfo;
if (avatar != null)
{
fileInfo = _tox.FileSend(friendNumber, ToxFileKind.Avatar, avatar.Length, "avatar.png", ToxTools.Hash(avatar), out error);
}
else
{
fileInfo = _tox.FileSend(friendNumber, ToxFileKind.Avatar, 0, "avatar.png");
}
if (error != ToxErrorFileSend.Ok)
{
Debugging.Write("Could not send file transfer request: " + error.ToString());
return;
}
//no point in adding a 'dummy' transfer to our list
if (avatar == null)
{
return;
}
var tr = new FileTransfer(fileInfo.Number, friendNumber, ToxFileKind.Avatar, FileTransferDirection.Outgoing);
if (!_transfers.ContainsKey(tr))
{
_transfers.Add(tr, new MemoryStream(avatar));
}
else
{
Debugging.Write("Tried to add a filetransfer that's already in the list, panic!");
}
}