public void ReceiveSessionSetup(EntityId from, ChatSetupHeader header)
{
var partner = GetEncrypt(from);
var p2 = new LibsodiumEncryption();
if (header == null)
{
throw new NullReferenceException("Error:/ message doesn't contain setup headers and session keys are missing");
}
if (header.publicOneTimeKey != null)
{
KeyPair oneTimeKeyPair = FindOneTimeKey(header.publicOneTimeKey);
partner.SetServerKeys(header, oneTimeKeyPair);
}
else
{
partner.SetServerKeys(header, null);
}
if (partner.DeriveKeysServer())
{
// save that we received the session, prevents resending requests
partner.ReceivedSetup();
// deriving was successful, send confirmation
SendCommand <ReceivedSetup, EntityId> (from, from);
}
else
{
throw new Exception("key deriviation failed");
}
}
public void GenerateAndSetSignature(KeyPair keys)
{
if (keys == null || keys.secretKey == null)
{
throw new NullReferenceException($"{nameof(keys)} has to be set");
}
signature = LibsodiumEncryption.SignByteDetached(TokenContent, keys);
}
/// <summary>
/// Validate the Token.
/// </summary>
/// <returns>The validate.</returns>
/// <param name="publicKey">Public key.</param>
public bool Validate(byte[] publicKey, EntityId currentServer)
{
var TimeAmount = new TimeSpan(1, 0, 0);
if (time < DateTime.Now.Subtract(TimeAmount))
{
throw new LoginFailedException($"The signed DateTime timed out, it is older than {TimeAmount.TotalMinutes} miniutes");
}
if (currentServer != targetServerId)
{
throw new LoginFailedException("The token wasn't made for this server");
}
return(LibsodiumEncryption.SignVertifyDetached(signature, TokenContent, publicKey));
}
/// <inheritdoc/>
public override bool ValidateSignature(byte[] data,byte[] signature, byte[] publicKey)
{
return LibsodiumEncryption.SignVertifyDetached(signature,data,publicKey);
}
/// <inheritdoc/>
public override byte[] GenerateSignature(byte[] data,KeyPair keyPair)
{
return LibsodiumEncryption.SignByteDetached(data,keyPair);
}
