/// <summary>Creates a new key pair based on the provided seed.</summary>
/// <param name="seed">Seed data.</param>
/// <returns>A KeyPair.</returns>
/// <exception cref="SeedOutOfRangeException"></exception>
public static KeyPair GenerateSeededKeyPair(byte[] seed)
{
var publicKey = new byte[PublicKeyBytes];
var privateKey = new byte[SecretKeyBytes];
// Expected length of the keypair seed
int seedBytes = SodiumLibrary.crypto_box_seedbytes();
//validate the length of the seed
if (seed == null || seed.Length != seedBytes)
{
throw new SeedOutOfRangeException("seed", (seed == null) ? 0 : seed.Length,
string.Format("Key seed must be {0} bytes in length.", SecretKeyBytes));
}
SodiumLibrary.crypto_box_seed_keypair(publicKey, privateKey, seed);
return(new KeyPair(publicKey, privateKey));
}