void CalMd5()

in common.cpp [121:205]
75 lines of code
1 McCabe index (conditional complexity)

void CalMd5(struct Md5Block block, uint32_t h[4])
{
    uint32_t a = h[0];
    uint32_t b = h[1];
    uint32_t c = h[2];
    uint32_t d = h[3];

    // Round 1
    FF (a, b, c, d, block.word[0], 7, 0xd76aa478);
    FF (d, a, b, c, block.word[1], 12, 0xe8c7b756);
    FF (c, d, a, b, block.word[2], 17, 0x242070db);
    FF (b, c, d, a, block.word[3], 22, 0xc1bdceee);
    FF (a, b, c, d, block.word[4], 7, 0xf57c0faf);
    FF (d, a, b, c, block.word[5], 12, 0x4787c62a);
    FF (c, d, a, b, block.word[6], 17, 0xa8304613);
    FF (b, c, d, a, block.word[7], 22, 0xfd469501);
    FF (a, b, c, d, block.word[8], 7, 0x698098d8);
    FF (d, a, b, c, block.word[9], 12, 0x8b44f7af);
    FF (c, d, a, b, block.word[10], 17, 0xffff5bb1);
    FF (b, c, d, a, block.word[11], 22, 0x895cd7be);
    FF (a, b, c, d, block.word[12], 7, 0x6b901122);
    FF (d, a, b, c, block.word[13], 12, 0xfd987193);
    FF (c, d, a, b, block.word[14], 17, 0xa679438e);
    FF (b, c, d, a, block.word[15], 22, 0x49b40821);

    // Round 2
    GG (a, b, c, d, block.word[1], 5, 0xf61e2562);
    GG (d, a, b, c, block.word[6], 9, 0xc040b340);
    GG (c, d, a, b, block.word[11], 14, 0x265e5a51);
    GG (b, c, d, a, block.word[0], 20, 0xe9b6c7aa);
    GG (a, b, c, d, block.word[5], 5, 0xd62f105d);
    GG (d, a, b, c, block.word[10], 9,  0x2441453);
    GG (c, d, a, b, block.word[15], 14, 0xd8a1e681);
    GG (b, c, d, a, block.word[4], 20, 0xe7d3fbc8);
    GG (a, b, c, d, block.word[9], 5, 0x21e1cde6);
    GG (d, a, b, c, block.word[14], 9, 0xc33707d6);
    GG (c, d, a, b, block.word[3], 14, 0xf4d50d87);
    GG (b, c, d, a, block.word[8], 20, 0x455a14ed);
    GG (a, b, c, d, block.word[13], 5, 0xa9e3e905);
    GG (d, a, b, c, block.word[2], 9, 0xfcefa3f8);
    GG (c, d, a, b, block.word[7], 14, 0x676f02d9);
    GG (b, c, d, a, block.word[12], 20, 0x8d2a4c8a);

    // Round 3
    HH (a, b, c, d, block.word[5], 4, 0xfffa3942);
    HH (d, a, b, c, block.word[8], 11, 0x8771f681);
    HH (c, d, a, b, block.word[11], 16, 0x6d9d6122);
    HH (b, c, d, a, block.word[14], 23, 0xfde5380c);
    HH (a, b, c, d, block.word[1], 4, 0xa4beea44);
    HH (d, a, b, c, block.word[4], 11, 0x4bdecfa9);
    HH (c, d, a, b, block.word[7], 16, 0xf6bb4b60);
    HH (b, c, d, a, block.word[10], 23, 0xbebfbc70);
    HH (a, b, c, d, block.word[13], 4, 0x289b7ec6);
    HH (d, a, b, c, block.word[0], 11, 0xeaa127fa);
    HH (c, d, a, b, block.word[3], 16, 0xd4ef3085);
    HH (b, c, d, a, block.word[6], 23,  0x4881d05);
    HH (a, b, c, d, block.word[9], 4, 0xd9d4d039);
    HH (d, a, b, c, block.word[12], 11, 0xe6db99e5);
    HH (c, d, a, b, block.word[15], 16, 0x1fa27cf8);
    HH (b, c, d, a, block.word[2], 23, 0xc4ac5665);

    // Round 4
    II (a, b, c, d, block.word[0], 6, 0xf4292244);
    II (d, a, b, c, block.word[7], 10, 0x432aff97);
    II (c, d, a, b, block.word[14], 15, 0xab9423a7);
    II (b, c, d, a, block.word[5], 21, 0xfc93a039);
    II (a, b, c, d, block.word[12], 6, 0x655b59c3);
    II (d, a, b, c, block.word[3], 10, 0x8f0ccc92);
    II (c, d, a, b, block.word[10], 15, 0xffeff47d);
    II (b, c, d, a, block.word[1], 21, 0x85845dd1);
    II (a, b, c, d, block.word[8], 6, 0x6fa87e4f);
    II (d, a, b, c, block.word[15], 10, 0xfe2ce6e0);
    II (c, d, a, b, block.word[6], 15, 0xa3014314);
    II (b, c, d, a, block.word[13], 21, 0x4e0811a1);
    II (a, b, c, d, block.word[4], 6, 0xf7537e82);
    II (d, a, b, c, block.word[11], 10, 0xbd3af235);
    II (c, d, a, b, block.word[2], 15, 0x2ad7d2bb);
    II (b, c, d, a, block.word[9], 21, 0xeb86d391);

    // Add to hash value
    h[0] += a;
    h[1] += b;
    h[2] += c;
    h[3] += d;
}