| 42 | } |
| 43 | |
| 44 | std::string Md5Hex(const void* data, size_t size) |
| 45 | { |
| 46 | static constexpr std::array<uint32_t, 64> shifts = {7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, |
| 47 | 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, |
| 48 | 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, |
| 49 | 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21}; |
| 50 | |
| 51 | static constexpr std::array<uint32_t, 64> constants = { |
| 52 | 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, |
| 53 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, |
| 54 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, |
| 55 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, |
| 56 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, |
| 57 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, |
| 58 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, |
| 59 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391}; |
| 60 | |
| 61 | const auto* input = static_cast<const uint8_t*>(data); |
| 62 | std::vector<uint8_t> message(input, input + size); |
| 63 | const uint64_t bitLength = static_cast<uint64_t>(size) * 8U; |
| 64 | |
| 65 | message.push_back(0x80); |
| 66 | while ((message.size() % 64) != 56) |
| 67 | message.push_back(0); |
| 68 | |
| 69 | for (int i = 0; i < 8; ++i) |
| 70 | message.push_back(static_cast<uint8_t>((bitLength >> (8 * i)) & 0xffU)); |
| 71 | |
| 72 | uint32_t a0 = 0x67452301; |
| 73 | uint32_t b0 = 0xefcdab89; |
| 74 | uint32_t c0 = 0x98badcfe; |
| 75 | uint32_t d0 = 0x10325476; |
| 76 | |
| 77 | for (size_t offset = 0; offset < message.size(); offset += 64) |
| 78 | { |
| 79 | uint32_t words[16]; |
| 80 | for (int i = 0; i < 16; ++i) |
| 81 | { |
| 82 | const size_t j = offset + static_cast<size_t>(i) * 4; |
| 83 | words[i] = static_cast<uint32_t>(message[j]) | (static_cast<uint32_t>(message[j + 1]) << 8) | |
| 84 | (static_cast<uint32_t>(message[j + 2]) << 16) | (static_cast<uint32_t>(message[j + 3]) << 24); |
| 85 | } |
| 86 | |
| 87 | uint32_t a = a0; |
| 88 | uint32_t b = b0; |
| 89 | uint32_t c = c0; |
| 90 | uint32_t d = d0; |
| 91 | |
| 92 | for (uint32_t i = 0; i < 64; ++i) |
| 93 | { |
| 94 | uint32_t f = 0; |
| 95 | uint32_t g = 0; |
| 96 | if (i < 16) |
| 97 | { |
| 98 | f = (b & c) | (~b & d); |
| 99 | g = i; |
| 100 | } |
| 101 | else if (i < 32) |