void DoMd5Big()

in common.cpp [267:330]
38 lines of code
3 McCabe index (conditional complexity)

void DoMd5Big(const uint8_t* poolIn, const uint64_t inputBytesNum, uint8_t hash[16])
{
    struct Md5Block block;
    uint8_t tempBlock[64];

    ///initialize hash value
    uint32_t h[4];
    h[0] = 0x67452301;
    h[1] = 0xEFCDAB89;
    h[2] = 0x98BADCFE;
    h[3] = 0x10325476;

    ///padding and divide input data into blocks
    uint64_t fullLen = (inputBytesNum >> 6) << 6;
    uint64_t partLen = inputBytesNum & 0x3F;

    uint32_t i;
    for (i = 0; i < fullLen; i += 64)
    {
        ///copy input data into block, in little endian
        CopyBytesToBlock(&(poolIn[i]), block);

        ///calculate Md5
        CalMd5(block, h);
    }

    ///append two more blocks
    if (partLen > 55)
    {
        ///put input data into a temporary block
        memcpy(tempBlock, &(poolIn[i]), partLen);
        memcpy(&(tempBlock[partLen]), gPadding, (64 - partLen));

        ///copy temporary data into block, in little endian
        CopyBytesToBlock(tempBlock, block);

        ///calculate Md5
        CalMd5(block, h);

        memset(tempBlock, 0x0, 64);
    }
    ///append one more block
    else
    {
        memcpy(tempBlock, &(poolIn[i]), partLen);
        memcpy( &(tempBlock[partLen]), gPadding, (64 - partLen));
    }
    ///append length (bits)
    uint64_t bitsNum = inputBytesNum * 8;
    memcpy(&(tempBlock[56]), &bitsNum, 8);

    ///copy temporary data into block, in little endian
    CopyBytesToBlock(tempBlock, block);

    ///calculate Md5
    CalMd5(block, h);

    ///clear sensitive information
    memset(block.word, 0, 64);
    memset(tempBlock, 0, 64);

    ///fill hash value
    memcpy(&(hash[0]), &(h[0]), 16);
}///DoMd5Big