diff options
Diffstat (limited to 'devtools/create_teenagent/md5.cpp')
| -rw-r--r-- | devtools/create_teenagent/md5.cpp | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/devtools/create_teenagent/md5.cpp b/devtools/create_teenagent/md5.cpp new file mode 100644 index 0000000000..9f90122981 --- /dev/null +++ b/devtools/create_teenagent/md5.cpp @@ -0,0 +1,264 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +// Disable symbol overrides so that we can use system headers. +#define FORBIDDEN_SYMBOL_ALLOW_ALL + +#include "md5.h" + +#define GET_UINT32(n, b, i) (n) = READ_LE_UINT32(b + i) +#define PUT_UINT32(n, b, i) WRITE_LE_UINT32(b + i, n) + +void md5_starts(md5_context *ctx) { + ctx->total[0] = 0; + ctx->total[1] = 0; + + ctx->state[0] = 0x67452301; + ctx->state[1] = 0xEFCDAB89; + ctx->state[2] = 0x98BADCFE; + ctx->state[3] = 0x10325476; +} + +static void md5_process(md5_context *ctx, const uint8 data[64]) { + uint32 X[16], A, B, C, D; + + GET_UINT32(X[0], data, 0); + GET_UINT32(X[1], data, 4); + GET_UINT32(X[2], data, 8); + GET_UINT32(X[3], data, 12); + GET_UINT32(X[4], data, 16); + GET_UINT32(X[5], data, 20); + GET_UINT32(X[6], data, 24); + GET_UINT32(X[7], data, 28); + GET_UINT32(X[8], data, 32); + GET_UINT32(X[9], data, 36); + GET_UINT32(X[10], data, 40); + GET_UINT32(X[11], data, 44); + GET_UINT32(X[12], data, 48); + GET_UINT32(X[13], data, 52); + GET_UINT32(X[14], data, 56); + GET_UINT32(X[15], data, 60); + +#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 = ctx->state[0]; + B = ctx->state[1]; + C = ctx->state[2]; + D = ctx->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 + + ctx->state[0] += A; + ctx->state[1] += B; + ctx->state[2] += C; + ctx->state[3] += D; +} + +void md5_update(md5_context *ctx, const uint8 *input, uint32 length) { + uint32 left, fill; + + if (!length) + return; + + left = ctx->total[0] & 0x3F; + fill = 64 - left; + + ctx->total[0] += length; + ctx->total[0] &= 0xFFFFFFFF; + + if (ctx->total[0] < length) + ctx->total[1]++; + + if (left && length >= fill) { + memcpy((void *)(ctx->buffer + left), (const void *)input, fill); + md5_process(ctx, ctx->buffer); + length -= fill; + input += fill; + left = 0; + } + + while (length >= 64) { + md5_process(ctx, input); + length -= 64; + input += 64; + } + + if (length) { + memcpy((void *)(ctx->buffer + left), (const void *)input, length); + } +} + +static const uint8 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 +}; + +void md5_finish(md5_context *ctx, uint8 digest[16]) { + uint32 last, padn; + uint32 high, low; + uint8 msglen[8]; + + high = (ctx->total[0] >> 29) | (ctx->total[1] << 3); + low = (ctx->total[0] << 3); + + PUT_UINT32(low, msglen, 0); + PUT_UINT32(high, msglen, 4); + + last = ctx->total[0] & 0x3F; + padn = (last < 56) ? (56 - last) : (120 - last); + + md5_update(ctx, md5_padding, padn); + md5_update(ctx, msglen, 8); + + PUT_UINT32(ctx->state[0], digest, 0); + PUT_UINT32(ctx->state[1], digest, 4); + PUT_UINT32(ctx->state[2], digest, 8); + PUT_UINT32(ctx->state[3], digest, 12); +} + +bool md5_file(const char *name, uint8 digest[16], uint32 length) { + FILE *f; + + f = fopen(name, "rb"); + if (f == NULL) { + printf("md5_file couldn't open '%s'\n", name); + return false; + } + + md5_context ctx; + uint32 i; + unsigned char buf[1000]; + bool restricted = (length != 0); + int readlen; + + if (!restricted || sizeof(buf) <= length) + readlen = sizeof(buf); + else + readlen = length; + + md5_starts(&ctx); + + + while ((i = (uint32)fread(buf, 1, readlen, f)) > 0) { + md5_update(&ctx, buf, i); + + length -= i; + if (restricted && length == 0) + break; + + if (restricted && sizeof(buf) > length) + readlen = length; + } + + md5_finish(&ctx, digest); + fclose(f); + return true; +} |