void CopyBlock(byte[] inputBuffer, int inputOffset)
{
int remaining_bytes = inputBuffer.Length - inputOffset;
int input_count = System.Math.Min(BlockSize, remaining_bytes);
if (input_count != BlockSize)
{
Array.Clear(mX, 0, mX.Length);
}
Bits.ArrayCopy(inputBuffer, inputOffset, mX, 0, input_count);
}
protected override byte[] ProcessFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount)
{
// it's okay to modify inputBuffer here since it's the final block and it's actually BlockHashAlgorithm's internal buffer
ulong msg_bit_length = ((ulong)TotalBytesProcessed + (ulong)inputCount) << 3;
if (inputOffset > 0 && inputCount > 0)
{
// memmove the bytes starting at inputOffset to the start of the buffer
Array.Copy(inputBuffer, inputOffset, inputBuffer, 0, inputCount);
}
inputOffset = 0;
Array.Clear(inputBuffer, inputCount, BlockSize - inputCount);
// write the padding byte then align up to the next word boundary (proceeding bytes are already zero due to above Clear)
int input_offset = inputCount;
inputBuffer[input_offset++] = (byte)Version; // padding byte
input_offset = IntegerMath.Align(IntegerMath.kInt64AlignmentBit, input_offset);
// if we don't have enough space to encode the length, process what we have now as a block.
// remaining bytes are still all zero, due to above Clear.
if (input_offset > (BlockSize - sizeof(ulong)))
{
ProcessBlock(inputBuffer, inputOffset, 1);
input_offset = 0;
Array.Clear(inputBuffer, 0, BlockSize);
}
// write out the number of bytes that were processed before finalization
for (input_offset = BlockSize - sizeof(ulong)
; msg_bit_length != 0
; inputBuffer[input_offset] = (byte)msg_bit_length, msg_bit_length >>= 8, ++input_offset)
{
}
ProcessBlock(inputBuffer, inputOffset, 1);
if (HashValue == null)
{
HashValue = new byte[HashSizeValue / kWordCount];
}
Bits.ArrayCopy(mRegs, 0, HashValue, 0, mRegs.Length);
return(HashValue);
}
public bool TryGetAsTiger192(byte[] buffer, int offset = 0)
{
if (buffer == null)
{
return(false);
}
if ((buffer.Length - offset) < (kHashSize / Bits.kByteBitCount))
{
return(false);
}
// This would only ever happen if Initialize wasn't called
if (mRegs != null && mRegs.Length >= 3)
{
Bits.ArrayCopy(mRegs, 0, buffer, offset, mRegs.Length);
return(true);
}
return(false);
}
