/// <summary>
/// Creates the initial state with zeros instead of the configuration block, then initializes the hash.
/// This does not start a new UBI block type, and must be done manually.
/// </summary>
public void Initialize(SkeinInitializationType initializationType)
{
switch (initializationType)
{
case SkeinInitializationType.Normal:
Initialize();
return;
case SkeinInitializationType.ZeroedState:
for (int i = 0; i < state.Length; i++)
{
state[i] = 0;
}
break;
case SkeinInitializationType.ChainedState:
break;
case SkeinInitializationType.ChainedConfig:
Configuration.GenerateConfiguration(state);
Initialize();
return;
}
bytesFilled = 0;
}
/// <summary>
/// Creates the initial state with zeros instead of the configuration block, then initializes the hash.
/// This does not start a new UBI block type, and must be done manually.
/// </summary>
public void Initialize(SkeinInitializationType initializationType)
{
switch (initializationType)
{
case SkeinInitializationType.Normal:
// Normal initialization
Init(null);
return;
case SkeinInitializationType.ZeroedState:
// Copy the configuration value to the state
for (int i = 0; i < _state.Length; i++)
{
_state[i] = 0;
}
break;
case SkeinInitializationType.ChainedState:
// Keep the state as it is and do nothing
break;
case SkeinInitializationType.ChainedConfig:
// Generate a chained configuration
Configuration.GenerateConfiguration(_state);
// Continue initialization
Init(null);
return;
}
// Reset bytes filled
_bytesFilled = 0;
}
/// <summary>
/// Used to re-initialize the digest state.
/// <para>Creates the initial state with zeros instead of the configuration block, then initializes the hash.
/// This does not start a new UBI block type, and must be done manually.</para>
/// </summary>
///
/// <param name="InitializationType">Initialization parameters</param>
public void Initialize(SkeinInitializationType InitializationType)
{
this.InitializationType = InitializationType;
switch (InitializationType)
{
case SkeinInitializationType.Normal:
{
// normal initialization
Initialize();
return;
}
case SkeinInitializationType.ZeroedState:
{
// copy the configuration value to the state
for (int i = 0; i < m_digestState.Length; i++)
{
m_digestState[i] = 0;
}
break;
}
case SkeinInitializationType.ChainedConfig:
{
// generate a chained configuration
GenerateConfiguration(m_digestState);
// continue initialization
Initialize();
return;
}
case SkeinInitializationType.ChainedState:
// keep the state as it is and do nothing
break;
}
// reset bytes filled
m_bytesFilled = 0;
}
/// <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);
}
/// <summary>
/// Initializes the Skein hash instance.
/// </summary>
///
/// <param name="InitializationType">Digest initialization type <see cref="SkeinInitializationType"/></param>
public Skein256(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 Threefish256();
// 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);
}
/// <summary>
/// Used to re-initialize the digest state.
/// <para>Creates the initial state with zeros instead of the configuration block, then initializes the hash.
/// This does not start a new UBI block type, and must be done manually.</para>
/// </summary>
///
/// <param name="InitializationType">Initialization parameters</param>
public void Initialize(SkeinInitializationType InitializationType)
{
this.InitializationType = InitializationType;
switch (InitializationType)
{
case SkeinInitializationType.Normal:
// Normal initialization
Initialize();
return;
case SkeinInitializationType.ZeroedState:
// Copy the configuration value to the state
for (int i = 0; i < _digestState.Length; i++)
_digestState[i] = 0;
break;
case SkeinInitializationType.ChainedState:
// Keep the state as it is and do nothing
break;
case SkeinInitializationType.ChainedConfig:
// Generate a chained configuration
GenerateConfiguration(_digestState);
// Continue initialization
Initialize();
return;
}
// Reset bytes filled
_bytesFilled = 0;
}
/// <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);
}
