private void CopyIn(SkeinEngine engine)
{
this.ubi.Reset(engine.ubi);
this.chain = engine.chain.DeepCopy();
this.initialState = engine.initialState.DeepCopy();
this.key = engine.key.DeepCopy();
this.preMessageParameters = Clone(engine.preMessageParameters, this.preMessageParameters);
this.postMessageParameters = Clone(engine.postMessageParameters, this.postMessageParameters);
}
public void Reset(IMemoable other)
{
SkeinEngine s = (SkeinEngine)other;
if ((BlockSize != s.BlockSize) || (outputSizeBytes != s.outputSizeBytes))
{
throw new MemoableResetException("Incompatible parameters in provided SkeinEngine.");
}
CopyIn(s);
}
public SkeinMac(SkeinMac mac)
{
this.engine = new SkeinEngine(mac.engine);
}
/// <summary>
/// Constructs a Skein MAC with an internal state size and output size.
/// </summary>
/// <param name="stateSizeBits">the internal state size in bits - one of <see cref="SKEIN_256"/> <see cref="SKEIN_512"/> or
/// <see cref="SKEIN_1024"/>.</param>
/// <param name="digestSizeBits">the output/MAC size to produce in bits, which must be an integral number of
/// bytes.</param>
public SkeinMac(int stateSizeBits, int digestSizeBits)
{
this.engine = new SkeinEngine(stateSizeBits, digestSizeBits);
}
/// <summary>
/// Creates a SkeinEngine as an exact copy of an existing instance.
/// </summary>
public SkeinEngine(SkeinEngine engine)
: this(engine.BlockSize * 8, engine.OutputSize * 8)
{
CopyIn(engine);
}
public UBI(SkeinEngine engine, int blockSize)
{
this.engine = engine;
currentBlock = new byte[blockSize];
message = new ulong[currentBlock.Length / 8];
}
public SkeinDigest(SkeinDigest digest)
{
this.engine = new SkeinEngine(digest.engine);
}
/// <summary>
/// Constructs a Skein digest with an internal state size and output size.
/// </summary>
/// <param name="stateSizeBits">the internal state size in bits - one of <see cref="SKEIN_256"/> <see cref="SKEIN_512"/> or
/// <see cref="SKEIN_1024"/>.</param>
/// <param name="digestSizeBits">the output/digest size to produce in bits, which must be an integral number of
/// bytes.</param>
public SkeinDigest(int stateSizeBits, int digestSizeBits)
{
this.engine = new SkeinEngine(stateSizeBits, digestSizeBits);
Init(null);
}