| /* |
| * Modified from Polarssl here |
| * http://polarssl.org/show_source?file=md5 |
| * under GPL2 or later |
| */ |
| |
| |
| #include <string.h> |
| #include <stdio.h> |
| |
| |
| #define GET_ULONG_LE(n, b, i) \ |
| { \ |
| (n) = ((unsigned long)(b)[i]) \ |
| | ((unsigned long)(b)[(i) + 1] << 8) \ |
| | ((unsigned long)(b)[(i) + 2] << 16) \ |
| | ((unsigned long)(b)[(i) + 3] << 24); \ |
| } |
| |
| #define PUT_ULONG_LE(n, b, i) \ |
| { \ |
| (b)[i] = (unsigned char)(n); \ |
| (b)[(i) + 1] = (unsigned char)((n) >> 8); \ |
| (b)[(i) + 2] = (unsigned char)((n) >> 16); \ |
| (b)[(i) + 3] = (unsigned char)((n) >> 24); \ |
| } |
| |
| static const unsigned char md5_padding[64] = { |
| 0x80, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| }; |
| |
| static const unsigned long state_init[] = { |
| 0, 0, 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476 |
| }; |
| |
| static void |
| md5_process(unsigned long *state, const unsigned char *data) |
| { |
| unsigned long X[16], A, B, C, D; |
| int v; |
| |
| for (v = 0; v < 16; v++) |
| GET_ULONG_LE(X[v], data, v << 2); |
| |
| #define S(x, n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n))) |
| |
| #define P(a, b, c, d, k, s, t) { a += F(b, c, d) + X[k] + t; a = S(a, s) + b; } |
| |
| A = state[0]; |
| B = state[1]; |
| C = state[2]; |
| D = state[3]; |
| |
| #define F(x, y, z) (z ^ (x & (y ^ z))) |
| |
| P(A, B, C, D, 0, 7, 0xD76AA478); |
| P(D, A, B, C, 1, 12, 0xE8C7B756); |
| P(C, D, A, B, 2, 17, 0x242070DB); |
| P(B, C, D, A, 3, 22, 0xC1BDCEEE); |
| P(A, B, C, D, 4, 7, 0xF57C0FAF); |
| P(D, A, B, C, 5, 12, 0x4787C62A); |
| P(C, D, A, B, 6, 17, 0xA8304613); |
| P(B, C, D, A, 7, 22, 0xFD469501); |
| P(A, B, C, D, 8, 7, 0x698098D8); |
| P(D, A, B, C, 9, 12, 0x8B44F7AF); |
| P(C, D, A, B, 10, 17, 0xFFFF5BB1); |
| P(B, C, D, A, 11, 22, 0x895CD7BE); |
| P(A, B, C, D, 12, 7, 0x6B901122); |
| P(D, A, B, C, 13, 12, 0xFD987193); |
| P(C, D, A, B, 14, 17, 0xA679438E); |
| P(B, C, D, A, 15, 22, 0x49B40821); |
| |
| #undef F |
| |
| #define F(x, y, z) (y ^ (z & (x ^ y))) |
| |
| P(A, B, C, D, 1, 5, 0xF61E2562); |
| P(D, A, B, C, 6, 9, 0xC040B340); |
| P(C, D, A, B, 11, 14, 0x265E5A51); |
| P(B, C, D, A, 0, 20, 0xE9B6C7AA); |
| P(A, B, C, D, 5, 5, 0xD62F105D); |
| P(D, A, B, C, 10, 9, 0x02441453); |
| P(C, D, A, B, 15, 14, 0xD8A1E681); |
| P(B, C, D, A, 4, 20, 0xE7D3FBC8); |
| P(A, B, C, D, 9, 5, 0x21E1CDE6); |
| P(D, A, B, C, 14, 9, 0xC33707D6); |
| P(C, D, A, B, 3, 14, 0xF4D50D87); |
| P(B, C, D, A, 8, 20, 0x455A14ED); |
| P(A, B, C, D, 13, 5, 0xA9E3E905); |
| P(D, A, B, C, 2, 9, 0xFCEFA3F8); |
| P(C, D, A, B, 7, 14, 0x676F02D9); |
| P(B, C, D, A, 12, 20, 0x8D2A4C8A); |
| |
| #undef F |
| |
| #define F(x, y, z) (x ^ y ^ z) |
| |
| P(A, B, C, D, 5, 4, 0xFFFA3942); |
| P(D, A, B, C, 8, 11, 0x8771F681); |
| P(C, D, A, B, 11, 16, 0x6D9D6122); |
| P(B, C, D, A, 14, 23, 0xFDE5380C); |
| P(A, B, C, D, 1, 4, 0xA4BEEA44); |
| P(D, A, B, C, 4, 11, 0x4BDECFA9); |
| P(C, D, A, B, 7, 16, 0xF6BB4B60); |
| P(B, C, D, A, 10, 23, 0xBEBFBC70); |
| P(A, B, C, D, 13, 4, 0x289B7EC6); |
| P(D, A, B, C, 0, 11, 0xEAA127FA); |
| P(C, D, A, B, 3, 16, 0xD4EF3085); |
| P(B, C, D, A, 6, 23, 0x04881D05); |
| P(A, B, C, D, 9, 4, 0xD9D4D039); |
| P(D, A, B, C, 12, 11, 0xE6DB99E5); |
| P(C, D, A, B, 15, 16, 0x1FA27CF8); |
| P(B, C, D, A, 2, 23, 0xC4AC5665); |
| |
| #undef F |
| |
| #define F(x, y, z) (y ^ (x | ~z)) |
| |
| P(A, B, C, D, 0, 6, 0xF4292244); |
| P(D, A, B, C, 7, 10, 0x432AFF97); |
| P(C, D, A, B, 14, 15, 0xAB9423A7); |
| P(B, C, D, A, 5, 21, 0xFC93A039); |
| P(A, B, C, D, 12, 6, 0x655B59C3); |
| P(D, A, B, C, 3, 10, 0x8F0CCC92); |
| P(C, D, A, B, 10, 15, 0xFFEFF47D); |
| P(B, C, D, A, 1, 21, 0x85845DD1); |
| P(A, B, C, D, 8, 6, 0x6FA87E4F); |
| P(D, A, B, C, 15, 10, 0xFE2CE6E0); |
| P(C, D, A, B, 6, 15, 0xA3014314); |
| P(B, C, D, A, 13, 21, 0x4E0811A1); |
| P(A, B, C, D, 4, 6, 0xF7537E82); |
| P(D, A, B, C, 11, 10, 0xBD3AF235); |
| P(C, D, A, B, 2, 15, 0x2AD7D2BB); |
| P(B, C, D, A, 9, 21, 0xEB86D391); |
| |
| #undef F |
| |
| state[0] += A; |
| state[1] += B; |
| state[2] += C; |
| state[3] += D; |
| } |
| |
| static |
| void md5_update(unsigned long * state, unsigned char * buffer, |
| const unsigned char *input, int ilen) |
| { |
| int fill; |
| unsigned long left; |
| |
| if (ilen <= 0) |
| return; |
| |
| left = state[0] & 0x3F; |
| fill = 64 - left; |
| |
| state[0] += ilen; |
| state[0] &= 0xFFFFFFFF; |
| |
| if (state[0] < (unsigned long)ilen) |
| state[1]++; |
| |
| if (left && ilen >= fill) { |
| memcpy(buffer + left, input, fill); |
| md5_process(&state[2], buffer); |
| input += fill; |
| ilen -= fill; |
| left = 0; |
| } |
| |
| while (ilen >= 64) { |
| md5_process(&state[2], input); |
| input += 64; |
| ilen -= 64; |
| } |
| |
| if (ilen > 0) |
| memcpy(buffer + left, input, ilen); |
| } |
| |
| void |
| libwebsockets_md5(const unsigned char *input, int ilen, unsigned char *output) |
| { |
| unsigned long last, padn; |
| unsigned long high, low; |
| unsigned char msglen[8]; |
| unsigned long state[6]; |
| unsigned char buffer[64]; |
| |
| memcpy(&state[0], &state_init[0], sizeof(state_init)); |
| |
| md5_update(state, buffer, input, ilen); |
| |
| high = (state[0] >> 29) | (state[1] << 3); |
| low = state[0] << 3; |
| |
| PUT_ULONG_LE(low, msglen, 0); |
| PUT_ULONG_LE(high, msglen, 4); |
| |
| last = state[0] & 0x3F; |
| padn = (last < 56) ? (56 - last) : (120 - last); |
| |
| md5_update(state, buffer, md5_padding, padn); |
| md5_update(state, buffer, msglen, 8); |
| |
| PUT_ULONG_LE(state[2], output, 0); |
| PUT_ULONG_LE(state[3], output, 4); |
| PUT_ULONG_LE(state[4], output, 8); |
| PUT_ULONG_LE(state[5], output, 12); |
| } |
| |
| |