/// <summary>
/// Hashes the given phrase.
/// </summary>
/// <param name="phrase">Phrase to hash.</param>
/// <returns>Hash of <paramref name="phrase" /> as a string.</returns>
/// <exception cref="T:System.ArgumentNullException"><paramref name="phrase" /> is null.</exception>
public string Hash(ClearPhrase phrase)
{
if (phrase == null)
{
throw new ArgumentNullException(nameof(phrase));
}
byte[] bytes = phrase.ToBytes();
var hash = _hashAlgorithm.Hash(bytes);
return(_encoder.Encode(hash));
}
/// <summary>
/// Verify that the hash of <paramref name="phrase" /> is equal to <paramref name="expectedHash" />.
/// </summary>
/// <param name="phrase">Clear text phrase.</param>
/// <param name="expectedHash">Hashed phrase.</param>
/// <returns>True if phrase and hashed phrase are equal; otherwise returns false.</returns>
/// <exception cref="T:System.ArgumentNullException"><paramref name="phrase" /> is null.</exception>
/// <exception cref="T:System.ArgumentNullException"><paramref name="expectedHash" /> is null.</exception>
public bool Verify(ClearPhrase phrase, string expectedHash)
{
if (phrase == null)
{
throw new ArgumentNullException(nameof(phrase));
}
if (expectedHash == null)
{
throw new ArgumentNullException(nameof(expectedHash));
}
var hash = Hash(phrase);
return(expectedHash
.FormatChecksum(_encodingType)
.Equals(hash, StringComparison.Ordinal));
}
