private void Dispose(bool Disposing)
{
if (!m_isDisposed && Disposing)
{
try
{
if (m_blockCipher != null)
{
m_blockCipher.Clear();
m_blockCipher = null;
}
if (m_cipherInput != null)
{
Array.Clear(m_cipherInput, 0, m_cipherInput.Length);
m_cipherInput = null;
}
if (m_digestState != null)
{
Array.Clear(m_digestState, 0, m_digestState.Length);
m_digestState = null;
}
}
finally
{
m_isDisposed = true;
}
}
}
/// <remarks>
/// Default generation function
/// </remarks>
private void GenerateConfiguration()
{
Threefish512 cipher = new Threefish512();
UbiTweak tweak = new UbiTweak();
// initialize the tweak value
tweak.StartNewBlockType(UbiType.Config);
tweak.IsFinalBlock = true;
tweak.BitsProcessed = 32;
cipher.SetTweak(tweak.Tweak);
cipher.Encrypt(m_configString, m_configValue);
m_configValue[0] ^= m_configString[0];
m_configValue[1] ^= m_configString[1];
m_configValue[2] ^= m_configString[2];
}
/// <summary>
/// Initializes the Skein hash instance
/// </summary>
///
/// <param name="InitializationType">Digest initialization type <see cref="SkeinInitializationType"/></param>
public Skein512(SkeinInitializationType InitializationType = SkeinInitializationType.Normal)
{
m_initializationType = InitializationType;
m_blockCipher = new Threefish512();
// allocate buffers
m_inputBuffer = new byte[STATE_BYTES];
m_cipherInput = new ulong[STATE_WORDS];
m_digestState = new ulong[STATE_WORDS];
// allocate tweak
m_ubiParameters = new UbiTweak();
// allocate config value
m_configValue = new ulong[STATE_BYTES];
// initialize and enerate the configuration string
m_configString = new ulong[STATE_BYTES];
m_configString[1] = (ulong)DigestSize * 8;
SetSchema(83, 72, 65, 51); // "SHA3"
SetVersion(1);
GenerateConfiguration();
Initialize(InitializationType);
}
/// <remarks>
/// Default generation function
/// </remarks>
private void GenerateConfiguration()
{
var cipher = new Threefish512();
var tweak = new UbiTweak();
// Initialize the tweak value
tweak.StartNewBlockType(UbiType.Config);
tweak.IsFinalBlock = true;
tweak.BitsProcessed = 32;
cipher.SetTweak(tweak.Tweak);
cipher.Encrypt(ConfigString, ConfigValue);
ConfigValue[0] ^= ConfigString[0];
ConfigValue[1] ^= ConfigString[1];
ConfigValue[2] ^= ConfigString[2];
}
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;
}
}
}
/// <summary>
/// Initializes the Skein hash instance
/// </summary>
///
/// <param name="InitializationType">Digest initialization type <see cref="SkeinInitializationType"/></param>
public Skein512(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 Threefish512();
// Allocate buffers
_inputBuffer = new byte[_cipherStateBytes];
_cipherInput = new UInt64[_cipherStateWords];
_digestState = new UInt64[_cipherStateWords];
// Allocate tweak
UbiParameters = new UbiTweak();
// initialize and enerate the configuration string
SkeinConfig();
SetSchema(83, 72, 65, 51); // "SHA3"
SetVersion(1);
GenerateConfiguration();
Initialize(InitializationType);
}