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Diffstat (limited to 'contrib/libmpq/libmpq/common.c')
| -rw-r--r-- | contrib/libmpq/libmpq/common.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/contrib/libmpq/libmpq/common.c b/contrib/libmpq/libmpq/common.c deleted file mode 100644 index 91b259f5515..00000000000 --- a/contrib/libmpq/libmpq/common.c +++ /dev/null @@ -1,222 +0,0 @@ -/* - * common.c -- shared functions used by mpq-tools. - * - * Copyright (c) 2003-2008 Maik Broemme <mbroemme@plusserver.de> - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* generic includes. */ -#include <ctype.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> -#if HAVE_UNISTD_H - #include <unistd.h> -#endif - -/* libmpq main includes. */ -#include "mpq.h" -#include "mpq-internal.h" - -/* libmpq generic includes. */ -#include "extract.h" - -#include "common.h" - -/* the global shared decryption buffer. it's a static array compiled into the - * library, and can be re-created by compiling and running crypt_buf_gen.c - */ -#include "crypt_buf.h" - -/* function to return the hash to a given string. */ -uint32_t libmpq__hash_string(const char *key, uint32_t offset) { - - /* some common variables. */ - uint32_t seed1 = 0x7FED7FED; - uint32_t seed2 = 0xEEEEEEEE; - - /* one key character. */ - uint32_t ch; - - /* prepare seeds. */ - while (*key != 0) { - ch = toupper(*key++); - seed1 = crypt_buf[offset + ch] ^ (seed1 + seed2); - seed2 = ch + seed1 + seed2 + (seed2 << 5) + 3; - } - - return seed1; -} - -/* function to encrypt a block. */ -int32_t libmpq__encrypt_block(uint32_t *in_buf, uint32_t in_size, uint32_t seed) { - - /* some common variables. */ - uint32_t seed2 = 0xEEEEEEEE; - uint32_t ch; - - /* we're processing the data 4 bytes at a time. */ - for (; in_size >= 4; in_size -= 4) { - seed2 += crypt_buf[0x400 + (seed & 0xFF)]; - ch = *in_buf ^ (seed + seed2); - seed = ((~seed << 0x15) + 0x11111111) | (seed >> 0x0B); - seed2 = *in_buf + seed2 + (seed2 << 5) + 3; - *in_buf++ = ch; - } - - /* if no error was found, return decrypted bytes. */ - return LIBMPQ_SUCCESS; -} - - -/* function to decrypt a block. */ -int32_t libmpq__decrypt_block(uint32_t *in_buf, uint32_t in_size, uint32_t seed) { - - /* some common variables. */ - uint32_t seed2 = 0xEEEEEEEE; - uint32_t ch; - - /* we're processing the data 4 bytes at a time. */ - for (; in_size >= 4; in_size -= 4) { - seed2 += crypt_buf[0x400 + (seed & 0xFF)]; - ch = *in_buf ^ (seed + seed2); - seed = ((~seed << 0x15) + 0x11111111) | (seed >> 0x0B); - seed2 = ch + seed2 + (seed2 << 5) + 3; - *in_buf++ = ch; - } - - /* if no error was found, return decrypted bytes. */ - return LIBMPQ_SUCCESS; -} - -/* function to detect decryption key. */ -int32_t libmpq__decrypt_key(uint8_t *in_buf, uint32_t in_size, uint32_t block_size) { - - /* some common variables. */ - uint32_t saveseed1; - - /* temp = seed1 + seed2 */ - uint32_t temp; - uint32_t i = 0; - - /* temp = seed1 + buffer[0x400 + (seed1 & 0xFF)] */ - temp = (*(uint32_t *)in_buf ^ in_size) - 0xEEEEEEEE; - - /* try all 255 possibilities. */ - for (i = 0; i < 0x100; i++) { - - /* some common variables. */ - uint32_t seed1; - uint32_t seed2 = 0xEEEEEEEE; - uint32_t ch; - uint32_t ch2; - - /* try the first uint32_t's (we exactly know the value). */ - seed1 = temp - crypt_buf[0x400 + i]; - seed2 += crypt_buf[0x400 + (seed1 & 0xFF)]; - ch = ((uint32_t *)in_buf)[0] ^ (seed1 + seed2); - - if (ch != in_size) { - continue; - } - - /* add one because we are decrypting block positions. */ - saveseed1 = seed1 + 1; - ch2 = ch; - - /* - * if ok, continue and test the second value. we don't know exactly the value, - * but we know that the second one has lower 16 bits set to zero (no compressed - * block is larger than 0xFFFF bytes) - */ - seed1 = ((~seed1 << 0x15) + 0x11111111) | (seed1 >> 0x0B); - seed2 = ch + seed2 + (seed2 << 5) + 3; - seed2 += crypt_buf[0x400 + (seed1 & 0xFF)]; - ch = ((uint32_t *)in_buf)[1] ^ (seed1 + seed2); - - /* check if we found the file seed. */ - if ((ch - ch2) <= block_size) { - - /* file seed found, so return it. */ - return saveseed1; - } - } - - /* if no file seed was found return with error. */ - return LIBMPQ_ERROR_DECRYPT; -} - -/* function to decompress or explode a block from mpq archive. */ -int32_t libmpq__decompress_block(uint8_t *in_buf, uint32_t in_size, uint8_t *out_buf, uint32_t out_size, uint32_t compression_type) { - - /* some common variables. */ - int32_t tb = 0; - - /* check if buffer is not compressed. */ - if (compression_type == LIBMPQ_FLAG_COMPRESS_NONE) { - - /* no compressed data, so copy input buffer to output buffer. */ - memcpy(out_buf, in_buf, out_size); - - /* store number of bytes copied. */ - tb = out_size; - } - - /* check if one compression mode is used. */ - else if (compression_type == LIBMPQ_FLAG_COMPRESS_PKZIP || - compression_type == LIBMPQ_FLAG_COMPRESS_MULTI) { - - /* check if block is really compressed, some blocks have set the compression flag, but are not compressed. */ - if (in_size < out_size) { - - /* check if we are using pkzip compression algorithm. */ - if (compression_type == LIBMPQ_FLAG_COMPRESS_PKZIP) { - - /* decompress using pkzip. */ - if ((tb = libmpq__decompress_pkzip(in_buf, in_size, out_buf, out_size)) < 0) { - - /* something on decompression failed. */ - return tb; - } - } - - /* check if we are using multiple compression algorithm. */ - else if (compression_type == LIBMPQ_FLAG_COMPRESS_MULTI) { - - /* - * check if it is a file compressed by blizzard's multiple compression, note that storm.dll - * version 1.0.9 distributed with warcraft 3 passes the full path name of the opened archive - * as the new last parameter. - */ - if ((tb = libmpq__decompress_multi(in_buf, in_size, out_buf, out_size)) < 0) { - - /* something on decompression failed. */ - return tb; - } - } - } else { - - /* block has set compression flag, but is not compressed, so copy data to output buffer. */ - memcpy(out_buf, in_buf, out_size); - - /* save the number of transferred bytes. */ - tb = in_size; - } - } - - /* if no error was found, return transferred bytes. */ - return tb; -} |