C++ (Cpp) Copy128 Examples

Example #1

File: rijndael.cpp Project: 717717/sumatrapdf

size_t Rijndael::blockDecrypt(const byte *input, size_t inputLen, byte *outBuffer)
{
  if (input == 0 || inputLen <= 0)
    return 0;

  byte block[16], iv[4][4];
  memcpy(iv,m_initVector,16); 

  size_t numBlocks=inputLen/16;
  for (size_t i = numBlocks; i > 0; i--)
  {
    decrypt(input, block);
    Xor128(block,block,(byte*)iv);
#if STRICT_ALIGN
    memcpy(iv, input, 16);
    memcpy(outBuf, block, 16);
#else
    Copy128((byte*)iv,input);
    Copy128(outBuffer,block);
#endif
    input += 16;
    outBuffer += 16;
  }

  memcpy(m_initVector,iv,16);
  
  return 16*numBlocks;
}

Example #2

File: rijndael.cpp Project: GetEnvy/Envy

void Rijndael::blockDecrypt(const byte *input, size_t inputLen, byte *outBuffer)
{
  if (inputLen <= 0)
    return;

  size_t numBlocks=inputLen/16;
#ifdef USE_SSE
  if (AES_NI)
  {
    blockDecryptSSE(input,numBlocks,outBuffer);
    return;
  }
#endif

  byte block[16], iv[4][4];
  memcpy(iv,m_initVector,16);

  for (size_t i = numBlocks; i > 0; i--)
  {
    byte temp[4][4];

    Xor128(temp,input,m_expandedKey[m_uRounds]);

    Xor128(block,   T5[temp[0][0]],T6[temp[3][1]],T7[temp[2][2]],T8[temp[1][3]]);
    Xor128(block+4, T5[temp[1][0]],T6[temp[0][1]],T7[temp[3][2]],T8[temp[2][3]]);
    Xor128(block+8, T5[temp[2][0]],T6[temp[1][1]],T7[temp[0][2]],T8[temp[3][3]]);
    Xor128(block+12,T5[temp[3][0]],T6[temp[2][1]],T7[temp[1][2]],T8[temp[0][3]]);

    for(int r = m_uRounds-1; r > 1; r--)
    {
      Xor128(temp,block,m_expandedKey[r]);
      Xor128(block,   T5[temp[0][0]],T6[temp[3][1]],T7[temp[2][2]],T8[temp[1][3]]);
      Xor128(block+4, T5[temp[1][0]],T6[temp[0][1]],T7[temp[3][2]],T8[temp[2][3]]);
      Xor128(block+8, T5[temp[2][0]],T6[temp[1][1]],T7[temp[0][2]],T8[temp[3][3]]);
      Xor128(block+12,T5[temp[3][0]],T6[temp[2][1]],T7[temp[1][2]],T8[temp[0][3]]);
    }

    Xor128(temp,block,m_expandedKey[1]);
    block[ 0] = S5[temp[0][0]];
    block[ 1] = S5[temp[3][1]];
    block[ 2] = S5[temp[2][2]];
    block[ 3] = S5[temp[1][3]];
    block[ 4] = S5[temp[1][0]];
    block[ 5] = S5[temp[0][1]];
    block[ 6] = S5[temp[3][2]];
    block[ 7] = S5[temp[2][3]];
    block[ 8] = S5[temp[2][0]];
    block[ 9] = S5[temp[1][1]];
    block[10] = S5[temp[0][2]];
    block[11] = S5[temp[3][3]];
    block[12] = S5[temp[3][0]];
    block[13] = S5[temp[2][1]];
    block[14] = S5[temp[1][2]];
    block[15] = S5[temp[0][3]];
    Xor128(block,block,m_expandedKey[0]);

    if (CBCMode)
      Xor128(block,block,iv);

    Copy128((byte*)iv,input);
    Copy128(outBuffer,block);

    input += 16;
    outBuffer += 16;
  }

  memcpy(m_initVector,iv,16);
}