public static byte[] GetSalt(byte[] data)
{
byte[] salt = new byte[SaltLength];
if (!ToxEncryptionFunctions.GetSalt(data, salt))
{
return(null);
}
return(salt);
}
internal static ToxPassKey?DeriveKey(string passphrase)
{
byte[] pp = Encoding.UTF8.GetBytes(passphrase);
var error = ToxErrorKeyDerivation.Ok;
var key = new ToxPassKey();
if (!ToxEncryptionFunctions.DeriveKeyFromPass(pp, (uint)pp.Length, ref key, ref error) || error != ToxErrorKeyDerivation.Ok)
{
return(null);
}
return(key);
}
public static byte[] EncryptData(byte[] data, string password, out ToxErrorEncryption error)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (password == null)
{
throw new ArgumentNullException("password");
}
byte[] output = new byte[data.Length + EncryptionExtraLength];
byte[] passBytes = Encoding.UTF8.GetBytes(password);
error = ToxErrorEncryption.Ok;
if (!ToxEncryptionFunctions.PassEncrypt(data, (uint)data.Length, passBytes, (uint)passBytes.Length, output, ref error) || error != ToxErrorEncryption.Ok)
{
return(null);
}
return(output);
}
public static byte[] DecryptData(byte[] data, ToxEncryptionKey key, out ToxErrorDecryption error)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
byte[] output = new byte[data.Length - EncryptionExtraLength];
var pass = key.ToPassKey();
error = ToxErrorDecryption.Ok;
if (!ToxEncryptionFunctions.PassKeyDecrypt(data, (uint)data.Length, ref pass, output, ref error) || error != ToxErrorDecryption.Ok)
{
return(null);
}
return(output);
}
public static bool IsDataEncrypted(byte[] data)
{
return(ToxEncryptionFunctions.IsDataEncrypted(data));
}
