private void wrapUp(int outputSize)
{
byte[] encOut = XofUtilities.RightEncode(outputSize * 8);
cshake.BlockUpdate(encOut, 0, encOut.Length);
firstOutput = false;
}
private static byte[] EncodeString(byte[] str)
{
if (Arrays.IsNullOrEmpty(str))
{
return(XofUtilities.LeftEncode(0L));
}
return(Arrays.Concatenate(XofUtilities.LeftEncode(str.Length * 8L), str));
}
private byte[] encodeString(byte[] str)
{
if (str == null || str.Length == 0)
{
return(XofUtilities.LeftEncode(0));
}
return(Arrays.Concatenate(XofUtilities.LeftEncode(str.Length * 8L), str));
}
public void Reset()
{
cshake.Reset();
Arrays.Clear(buffer);
byte[] hdr = XofUtilities.LeftEncode(B);
cshake.BlockUpdate(hdr, 0, hdr.Length);
nCount = 0;
bufOff = 0;
firstOutput = true;
}
/// <summary>
/// Base constructor
/// </summary>
/// <param name="bitLength">bit length of the underlying SHAKE function, 128 or 256.</param>
/// <param name="N">the function name string, note this is reserved for use by NIST. Avoid using it if not required.</param>
/// <param name="S">the customization string - available for local use.</param>
public CShakeDigest(int bitLength, byte[] N, byte[] S) : base(bitLength)
{
if ((N == null || N.Length == 0) && (S == null || S.Length == 0))
{
diff = null;
}
else
{
diff = Arrays.ConcatenateAll(XofUtilities.LeftEncode(rate / 8), encodeString(N), encodeString(S));
DiffPadAndAbsorb();
}
}
private void wrapUp(int outputSize)
{
if (bufOff != 0)
{
compress();
}
byte[] nOut = XofUtilities.RightEncode(nCount);
byte[] encOut = XofUtilities.RightEncode(outputSize * 8);
cshake.BlockUpdate(nOut, 0, nOut.Length);
cshake.BlockUpdate(encOut, 0, encOut.Length);
firstOutput = false;
}
public void BlockUpdate(byte[] inBuf, int inOff, int len)
{
byte[] bytes = XofUtilities.Encode(inBuf, inOff, len);
cshake.BlockUpdate(bytes, 0, bytes.Length);
}
public void Update(byte b)
{
byte[] bytes = XofUtilities.Encode(b);
cshake.BlockUpdate(bytes, 0, bytes.Length);
}