/// <summary>Returns the hash in a string format, which includes the generated salt.</summary>
/// <param name="password">The password.</param>
/// <param name="opsLimit">Represents a maximum amount of computations to perform.</param>
/// <param name="memLimit">Is the maximum amount of RAM that the function will use, in bytes.</param>
/// <returns>Returns an zero-terminated ASCII encoded string of the computed password and hash.</returns>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
/// <exception cref="OutOfMemoryException"></exception>
public static string ArgonHashString(string password, long opsLimit, int memLimit)
{
if (password == null)
{
throw new ArgumentNullException("password", "Password cannot be null");
}
if (opsLimit < 3)
{
throw new ArgumentOutOfRangeException("opsLimit", "opsLimit the number of passes, has to be at least 3");
}
if (memLimit <= 0)
{
throw new ArgumentOutOfRangeException("memLimit", "memLimit cannot be zero or negative");
}
var buffer = new byte[ARGON_STRBYTES];
var pass = Encoding.UTF8.GetBytes(password);
SodiumCore.Init();
var ret = SodiumLibrary.crypto_pwhash_str(buffer, pass, pass.Length, opsLimit, memLimit);
if (ret != 0)
{
throw new OutOfMemoryException("Internal error, hash failed (usually because the operating system refused to allocate the amount of requested memory).");
}
return(Encoding.UTF8.GetString(buffer));
}