private void Dispose(bool Disposing)
{
if (!_isDisposed && Disposing)
{
try
{
if (_blockCipher != null)
{
_blockCipher.Clear();
_blockCipher = null;
}
if (_cipherInput != null)
{
Array.Clear(_cipherInput, 0, _cipherInput.Length);
_cipherInput = null;
}
if (_digestState != null)
{
Array.Clear(_digestState, 0, _digestState.Length);
_digestState = null;
}
}
finally
{
_isDisposed = true;
}
}
}
public void GenerateConfiguration(UInt64[] InitialState)
{
var cipher = new Threefish1024();
var tweak = new UbiTweak();
// Initialize the tweak value
tweak.StartNewBlockType(UbiType.Config);
tweak.IsFinalBlock = true;
tweak.BitsProcessed = 32;
cipher.SetKey(InitialState);
cipher.SetTweak(tweak.Tweak);
cipher.Encrypt(ConfigString, ConfigValue);
ConfigValue[0] ^= ConfigString[0];
ConfigValue[1] ^= ConfigString[1];
ConfigValue[2] ^= ConfigString[2];
}
/// <summary>
/// Initializes the Skein hash instance
/// </summary>
///
/// <param name="InitializationType">Digest initialization type <see cref="SkeinInitializationType"/></param>
public Skein1024(SkeinInitializationType InitializationType = SkeinInitializationType.Normal)
{
this.InitializationType = InitializationType;
_cipherStateBits = STATE_SIZE;
_cipherStateBytes = STATE_SIZE / 8;
_cipherStateWords = STATE_SIZE / 64;
_outputBytes = (STATE_SIZE + 7) / 8;
_blockCipher = new Threefish1024();
// Allocate buffers
_inputBuffer = new byte[_cipherStateBytes];
_cipherInput = new UInt64[_cipherStateWords];
_digestState = new UInt64[_cipherStateWords];
// Allocate tweak
UbiParameters = new UbiTweak();
// Generate the configuration string
SkeinConfig();
SetSchema(83, 72, 65, 51); // "SHA3"
SetVersion(1);
GenerateConfiguration();
Initialize(InitializationType);
}
