CryptXkcp.c

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#include "CryptParallelHash.h"
 
UINTN
EFIAPI
LeftEncode (
  OUT UINT8  *EncBuf,
  IN  UINTN  Value
  )
{
  UINT32  BlockNum;
  UINT32  EncLen;
  UINT32  Index;
  UINTN   ValueCopy;
 
  for ( ValueCopy = Value, BlockNum = 0; ValueCopy && (BlockNum < sizeof (UINTN)); ++BlockNum, ValueCopy >>= 8 ) {
    //
    // Empty
    //
  }
 
  if (BlockNum == 0) {
    BlockNum = 1;
  }
 
  for (Index = 1; Index <= BlockNum; ++Index) {
    EncBuf[Index] = (UINT8)(Value >> (8 * (BlockNum - Index)));
  }
 
  EncBuf[0] = (UINT8)BlockNum;
  EncLen    = BlockNum + 1;
 
  return EncLen;
}
 
UINTN
EFIAPI
RightEncode (
  OUT UINT8  *EncBuf,
  IN  UINTN  Value
  )
{
  UINT32  BlockNum;
  UINT32  EncLen;
  UINT32  Index;
  UINTN   ValueCopy;
 
  for (ValueCopy = Value, BlockNum = 0; ValueCopy && (BlockNum < sizeof (UINTN)); ++BlockNum, ValueCopy >>= 8) {
    //
    // Empty
    //
  }
 
  if (BlockNum == 0) {
    BlockNum = 1;
  }
 
  for (Index = 1; Index <= BlockNum; ++Index) {
    EncBuf[Index-1] = (UINT8)(Value >> (8 * (BlockNum-Index)));
  }
 
  EncBuf[BlockNum] = (UINT8)BlockNum;
  EncLen           = BlockNum + 1;
 
  return EncLen;
}