/// <summary>
/// Initializes a new instance of tox dns3.
/// </summary>
/// <param name="publicKey">The public key that this instance of toxdns should be initialized with.</param>
public ToxDns(ToxKey publicKey)
{
_toxDns3 = ToxDnsFunctions.New(publicKey.GetBytes());
if (_toxDns3 == null || _toxDns3.IsInvalid)
{
throw new Exception("Could not create a new tox_dns3 instance with the provided publicKey");
}
}
/// <summary>
/// Decodes and decrypts the dns3 string returned by <see cref="GenerateDns3String"/>.
/// </summary>
/// <param name="dns3String">String to decrypt.</param>
/// <param name="requestId">The request id retrieved with GenerateDns3String.</param>
/// <returns></returns>
public string DecryptDns3TXT(string dns3String, int requestId)
{
ThrowIfDisposed();
byte[] id = new byte[ToxConstants.AddressSize];
byte[] idRecordBytes = Encoding.UTF8.GetBytes(dns3String);
int result = ToxDnsFunctions.DecryptDns3TXT(_toxDns3, id, idRecordBytes, (uint)idRecordBytes.Length, ToxTools.Map(requestId));
if (result == 0)
{
return(ToxTools.HexBinToString(id));
}
else
{
throw new Exception("Could not decrypt and decode id_record");
}
}
/// <summary>
/// Generates a dns3 string used to query the dns server.
/// </summary>
/// <param name="name">Name of the registered user.</param>
/// <param name="requestId">The request id, to be used when calling DecryptDns3TXT.</param>
/// <returns></returns>
public string GenerateDns3String(string name, out int requestId)
{
ThrowIfDisposed();
byte[] bytes = Encoding.UTF8.GetBytes(name);
byte[] result = new byte[1024];
uint id = new uint();
int length = ToxDnsFunctions.GenerateDns3String(_toxDns3, result, (ushort)result.Length, ref id, bytes, (byte)bytes.Length);
requestId = ToxTools.Map(id);
if (length != -1)
{
return(Encoding.UTF8.GetString(result, 0, length));
}
else
{
throw new Exception("Failed to generate a dns3 string");
}
}
/// <summary>
/// Executes tox_dns3_kill to free the toxdns handle.
/// </summary>
/// <returns></returns>
protected override bool ReleaseHandle()
{
ToxDnsFunctions.Kill(handle);
return(true);
}