/// <summary>
/// Validates user input against stored input.
/// </summary>
/// <param name="input">Input to compare.</param>
/// <param name="reference">Reference password.</param>
/// <returns>Whether the passwords match.</returns>
public async Task <bool> ValidatePasswordHashAsync(string input, byte[] reference)
{
var salt = reference.AsSpan(0, SaltSize).ToArray();
var utfinput = AbstractionUtilities.UTF8.GetBytes(input);
var output = await this.KeyDeriver.DeriveHashAsync(utfinput, salt, PasswordSize);
return(AbstractionUtilities.ConstantTimeEquals(output, reference.AsSpan(SaltSize), PasswordSize));
}
