/// <summary>
/// Calculate a unique hash for a non-null series of bytes (Uses SHA256 by default)
/// </summary>
/// <param name="bytesToHash">Non-null list of bytes upon which to calculate hash</param>
/// <param name="hashSalt">(optional) Additional text that you want to use to add addtional 'secrecy' to your hash. If provided uses HMAC256 instead of SHA256</param>
/// <returns>Base64 encoded string of hash. The value is suitable for storing in databases but might need to be HtmlEncoded if used in query strings or displayed on web pages</returns>
public static byte[] Hash(byte[] bytesToHash, byte[] hashSalt = null)
{
if (hashSalt == null)
{
var simpleKey = HashKeySimple.Create(_defaultSimpleHashMode);
return(simpleKey.Hash(bytesToHash));
}
var keyedHasher = HashKeySalted.Create(_defaultSaltedHashMode, hashSalt);
return(keyedHasher.Hash(bytesToHash));
}
/// <summary>
/// Create a key using a specific Crypto.HashModesKeyed and specific salt.
/// </summary>
/// <param name="hashMode">One of the Crypto.HashModesKeyed constants</param>
/// <param name="salt">Non-null salt value to use in hashing operations</param>
/// <returns>Newly created key</returns>
public static HashKeySalted Create(string hashMode, byte[] salt)
{
var key = new HashKeySalted();
key.Properties.Add(new KeyProperty()
{
PropertyType = Crypto.PropertyTypes.HashSaltedMode,
Value = hashMode,
ValueType = Crypto.PropertyValueTypes.String
});
key.Segments.Add(Crypto.SegmentTypes.HashSalt, salt);
return(key);
}
/// <summary>
/// Create a key using a specific Crypto.HashModesKeyed and specific salt.
/// </summary>
/// <param name="hashMode">One of the Crypto.HashModesKeyed constants</param>
/// <param name="salt">Non-null salt value to use in hashing operations</param>
/// <returns>Newly created key</returns>
public static HashKeySalted Create(string hashMode, byte[] salt)
{
var key = new HashKeySalted();
key.Properties.Add(new KeyProperty()
{
PropertyType = Crypto.PropertyNames.HashSaltedMode,
Value = hashMode,
ValueType = Crypto.PropertyValueTypes.String
});
key.Segments.Add(Crypto.SegmentNames.HashSalt, salt);
return key;
}
