public static byte[] ConvertEd25519SecretKeyToCurve25519SecretKey(byte[] ed25519SecretKey)
{
if (ed25519SecretKey == null || (ed25519SecretKey.Length != 32 && ed25519SecretKey.Length != 64))
{
throw new KeyOutOfRangeException("ed25519SecretKey", (ed25519SecretKey == null) ? 0 : ed25519SecretKey.Length, string.Format("ed25519SecretKey must be either {0} or {1} bytes in length.", 32, 64));
}
byte[] array = new byte[32];
if (SodiumLibrary.crypto_sign_ed25519_sk_to_curve25519(array, ed25519SecretKey) != 0)
{
throw new CryptographicException("Failed to convert secret key.");
}
return(array);
}
