695 lines
29 KiB
C
695 lines
29 KiB
C
/*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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*
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* Authors: Michal 'GiM' Spadlinski
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "clamav.h"
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#include "pe.h"
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#include "rebuildpe.h"
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#include "others.h"
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#include "upack.h"
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#include "mew.h"
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#define EC32(x) le32_to_host(x) /* Convert little endian to host */
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#define CE32(x) be32_to_host(x) /* Convert big endian to host */
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int unupack399(char *, uint32_t, uint32_t, char *, uint32_t, char *, char *, uint32_t, char *);
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enum { UPACK_399,
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UPACK_11_12,
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UPACK_0151477,
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UPACK_0297729 };
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int unupack(int upack, char *dest, uint32_t dsize, char *buff, uint32_t vma, uint32_t ep, uint32_t base, uint32_t va, int file)
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{
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int j, searchval;
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char *loc_esi = NULL, *loc_edi = NULL, *loc_ebx = NULL, *end_edi = NULL, *save_edi = NULL, *alvalue = NULL;
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char *paddr = NULL, *pushed_esi = NULL, *save2 = NULL;
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uint32_t save1, save3, loc_ecx, count, shlsize, original_ep, ret, loc_ebx_u;
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struct cli_exe_section section;
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int upack_version = UPACK_399;
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/* buff [168 bytes] doesn't have to be checked, since it was checked in pe.c */
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if (upack) {
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uint32_t aljump, shroff, lngjmpoff;
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/* dummy characteristics ;/ */
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if (buff[5] == '\xff' && buff[6] == '\x36')
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upack_version = UPACK_0297729;
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loc_esi = dest + (cli_readint32(buff + 1) - vma);
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 12))
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return -1;
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original_ep = cli_readint32(loc_esi);
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loc_esi += 4;
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/*cli_readint32(loc_esi);*/
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loc_esi += 4;
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original_ep -= vma;
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cli_dbgmsg("Upack: EP: %08x original: %08X || %08x\n", ep, original_ep, cli_readint32(loc_esi - 8));
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if (upack_version == UPACK_399) {
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/* jmp 1 */
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loc_edi = dest + (cli_readint32(loc_esi) - vma);
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if (!CLI_ISCONTAINED(dest, dsize, dest + ep + 0xa, 2) || dest[ep + 0xa] != '\xeb')
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return -1;
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loc_esi = dest + *(dest + ep + 0xb) + ep + 0xc;
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/* use this as a temp var */
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/* jmp 2 + 0xa */
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alvalue = loc_esi + 0x1a;
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if (!CLI_ISCONTAINED(dest, dsize, alvalue, 2) || *alvalue != '\xeb')
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return -1;
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alvalue++;
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alvalue += (*alvalue & 0xff) + 1 + 0xa;
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lngjmpoff = 8;
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} else {
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if (!CLI_ISCONTAINED(dest, dsize, dest + ep + 7, 5) || dest[ep + 7] != '\xe9')
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return -1;
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loc_esi = dest + cli_readint32(dest + ep + 8) + ep + 0xc;
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alvalue = loc_esi + 0x25;
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lngjmpoff = 10;
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}
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if (!CLI_ISCONTAINED(dest, dsize, alvalue, 2) || *alvalue != '\xb5')
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return -1;
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alvalue++;
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count = *alvalue & 0xff;
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if (!CLI_ISCONTAINED(dest, dsize, alvalue, lngjmpoff + 5) || *(alvalue + lngjmpoff) != '\xe9')
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return -1;
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/* use this as a temp to make a long jmp to head of unpacking proc */
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shlsize = cli_readint32(alvalue + lngjmpoff + 1);
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/* upack_399 + upack_0151477 */
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if (upack_version == UPACK_399)
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shlsize = shlsize + (loc_esi - dest) + *(loc_esi + 0x1b) + 0x1c + 0x018; /* read checked above */
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else
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/* there is no additional jump in upack_0297729 */
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shlsize = shlsize + (loc_esi - dest) + 0x035;
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/* do the jump, 43 - point to jecxz */
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alvalue = dest + shlsize + 43;
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/* 0.39 */
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aljump = 8;
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shroff = 24;
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if (!CLI_ISCONTAINED(dest, dsize, alvalue - 1, 2) || *(alvalue - 1) != '\xe3') {
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/* in upack_0297729 and upack_0151477 jecxz is at offset: 46 */
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alvalue = dest + shlsize + 46;
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if (!CLI_ISCONTAINED(dest, dsize, alvalue - 1, 2) || *(alvalue - 1) != '\xe3')
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return -1;
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else {
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if (upack_version != UPACK_0297729)
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upack_version = UPACK_0151477;
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aljump = 7;
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shroff = 26;
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}
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}
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/* do jecxz */
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alvalue += (*alvalue & 0xff) + 1;
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/* is there a long jump ? */
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if (!CLI_ISCONTAINED(dest, dsize, alvalue, aljump + 5) || *(alvalue + aljump) != '\xe9')
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return -1;
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/* do jmp, 1+4 - size of jmp instruction, aljump - instruction offset, 27 offset to cmp al,xx*/
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ret = cli_readint32(alvalue + aljump + 1);
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alvalue += ret + aljump + 1 + 4 + 27;
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if (upack_version == UPACK_0297729)
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alvalue += 2;
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/* shr ebp */
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if (!CLI_ISCONTAINED(dest, dsize, dest + shlsize + shroff, 3) || *(dest + shlsize + shroff) != '\xc1' || *(dest + shlsize + shroff + 1) != '\xed')
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return -1;
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shlsize = (*(dest + shlsize + shroff + 2)) & 0xff;
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count *= 0x100;
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if (shlsize < 2 || shlsize > 8) {
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cli_dbgmsg("Upack: context bits out of bounds\n");
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return -1;
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}
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cli_dbgmsg("Upack: Context Bits parameter used with lzma: %02x, %02x\n", shlsize, count);
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/* check if loc_esi + .. == 0xbe -> mov esi */
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/* upack_0297729 has mov esi, .. + mov edi, .., in upack_0151477 and upack_399 EDI has been already set before */
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if (upack_version == UPACK_0297729) {
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi + 6, 10) || *(loc_esi + 6) != '\xbe' || *(loc_esi + 11) != '\xbf')
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return -1;
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if ((uint32_t)cli_readint32(loc_esi + 7) < base || (uint32_t)cli_readint32(loc_esi + 7) > vma)
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return -1;
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loc_edi = dest + (cli_readint32(loc_esi + 12) - vma);
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loc_esi = dest + (cli_readint32(loc_esi + 7) - base);
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} else {
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi + 7, 5) || *(loc_esi + 7) != '\xbe')
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return -1;
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loc_esi = dest + (cli_readint32(loc_esi + 8) - vma);
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}
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if (upack_version == UPACK_0297729) {
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/* 0x16*4=0x58, 6longs*4 = 24, 0x64-last loc_esi read location */
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if (!CLI_ISCONTAINED(dest, dsize, loc_edi, (0x58 + 24 + 4 * count)) || !CLI_ISCONTAINED(dest, dsize, loc_esi, (0x58 + 0x64 + 4)))
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return -1;
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/* XXX I don't know if this [0x16] is constant number, not enough samples provided */
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for (j = 0; j < 0x16; j++, loc_esi += 4, loc_edi += 4)
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cli_writeint32(loc_edi, cli_readint32(loc_esi));
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} else {
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/* 0x27*4=0x9c, 6longs*4 = 24, 0x34-last loc_esi read location */
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if (!CLI_ISCONTAINED(dest, dsize, loc_edi, (0x9c + 24 + 4 * count)) || !CLI_ISCONTAINED(dest, dsize, loc_esi, (0x9c + 0x34 + 4)))
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return -1;
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for (j = 0; j < 0x27; j++, loc_esi += 4, loc_edi += 4)
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cli_writeint32(loc_edi, cli_readint32(loc_esi));
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}
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save3 = cli_readint32(loc_esi + 4);
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paddr = dest + ((uint32_t)cli_readint32(loc_edi - 4)) - vma;
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loc_ebx = loc_edi;
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cli_writeint32(loc_edi, 0xffffffff);
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loc_edi += 4;
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cli_writeint32(loc_edi, 0);
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loc_edi += 4;
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for (j = 0; j < 4; j++, loc_edi += 4)
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cli_writeint32(loc_edi, (1));
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for (j = 0; (unsigned int)j < count; j++, loc_edi += 4)
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cli_writeint32(loc_edi, 0x400);
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loc_edi = dest + cli_readint32(loc_esi + 0xc) - vma;
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if (upack_version == UPACK_0297729)
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loc_edi = dest + vma - base; /* XXX not enough samples provided to be sure of it! */
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pushed_esi = loc_edi;
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if (upack_version == UPACK_0297729) {
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end_edi = dest + cli_readint32(loc_esi + 0x64) - vma;
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save3 = cli_readint32(loc_esi + 0x40);
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} else {
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end_edi = dest + cli_readint32(loc_esi + 0x34) - vma;
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}
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if (loc_edi > end_edi) {
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cli_dbgmsg("Upack: loc_edi > end_edi breaks cli_rebuildpe() bb#11216\n");
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return -1;
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}
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/* begin end */
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cli_dbgmsg("Upack: data initialized, before upack lzma call!\n");
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if ((ret = (uint32_t)unupack399(dest, dsize, 0, loc_ebx, 0, loc_edi, end_edi, shlsize, paddr)) == 0xffffffff)
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return -1;
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/* alternative begin */
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} else {
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int ep_jmp_offs, rep_stosd_count_offs, context_bits_offs;
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loc_esi = dest + vma + ep;
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/* yet another dummy characteristics ;/ */
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if (buff[0] == '\xbe' && buff[5] == '\xad' && buff[6] == '\x8b' && buff[7] == '\xf8')
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upack_version = UPACK_11_12;
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if (upack_version == UPACK_11_12) {
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ep_jmp_offs = 0x1a4;
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rep_stosd_count_offs = 0x1b;
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context_bits_offs = 0x41;
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alvalue = loc_esi + 0x184;
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} else {
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ep_jmp_offs = 0x217;
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rep_stosd_count_offs = 0x3a;
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context_bits_offs = 0x5f;
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alvalue = loc_esi + 0x1c1;
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}
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi, ep_jmp_offs + 4))
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return -1;
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save1 = cli_readint32(loc_esi + ep_jmp_offs);
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original_ep = (loc_esi - dest) + ep_jmp_offs + 4;
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original_ep += (int32_t)save1;
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cli_dbgmsg("Upack: EP: %08x original %08x\n", ep, original_ep);
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/* this are really ugly hacks,
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* rep_stosd_count_offs & context_bits_offs are < ep_jmp_offs,
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* so checked in CLI_ISCONTAINED above */
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count = (*(loc_esi + rep_stosd_count_offs)) & 0xff;
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shlsize = (*(loc_esi + context_bits_offs)) & 0xff;
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shlsize = 8 - shlsize;
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if (shlsize < 2 || shlsize > 8) {
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cli_dbgmsg("Upack: context bits out of bounds\n");
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return -1;
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}
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count *= 0x100;
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cli_dbgmsg("Upack: Context Bits parameter used with lzma: %02x, %02x\n", shlsize, count);
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if (upack_version == UPACK_399) {
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loc_esi += 4;
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loc_ecx = cli_readint32(loc_esi + 2);
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cli_writeint32(loc_esi + 2, 0);
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if (!loc_ecx) {
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cli_dbgmsg("Upack: something's wrong, report back\n");
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return -1; /* XXX XXX XXX XXX */
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}
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loc_esi -= (loc_ecx - 2);
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 12))
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return -1;
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cli_dbgmsg("Upack: %p %p %08x %08x\n", loc_esi, dest, cli_readint32(loc_esi), base);
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loc_ebx_u = loc_esi - (dest + cli_readint32(loc_esi) - base);
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cli_dbgmsg("Upack: EBX: %08x\n", loc_ebx_u);
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loc_esi += 4;
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save2 = loc_edi = dest + cli_readint32(loc_esi) - base;
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cli_dbgmsg("Upack: DEST: %08x, %08x\n", cli_readint32(loc_esi), cli_readint32(loc_esi) - base);
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loc_esi += 4;
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/* 2vGiM: j is signed. Is that really what you want? Will it cause problems with the following checks?
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* yes! this is wrong! how did you notice that?!
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*/
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j = cli_readint32(loc_esi);
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if (j < 0) {
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cli_dbgmsg("Upack: probably hand-crafted data, report back\n");
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return -1;
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}
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loc_esi += 4;
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cli_dbgmsg("Upack: ecx counter: %08x\n", j);
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if (((uint64_t)count + j) * 4 > UINT_MAX)
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return -1;
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi, (j * 4)) || !CLI_ISCONTAINED(dest, dsize, loc_edi, ((j + count) * 4)))
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return -1;
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for (; j--; loc_edi += 4, loc_esi += 4)
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cli_writeint32(loc_edi, cli_readint32(loc_esi));
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if (!CLI_ISCONTAINED(dest, dsize, save2, 8))
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return -1;
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loc_ecx = cli_readint32(save2);
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save2 += 4;
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loc_esi = save2;
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/* I could probably do simple loc_esi+= (0xe<<2),
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* but I'm not sure if there is always 0xe and is always ebx =0
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*/
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do {
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loc_esi += loc_ebx_u;
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loc_esi += 4;
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} while (--loc_ecx);
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if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 4))
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return -1;
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save1 = cli_readint32(loc_esi); /* loc_eax = 0x400 */
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loc_esi += 4;
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for (j = 0; (uint32_t)j < count; j++, loc_edi += 4) /* checked above */
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cli_writeint32(loc_edi, (save1));
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if (!CLI_ISCONTAINED(dest, dsize, (loc_esi + 0x10), 4))
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return -1;
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cli_writeint32(loc_esi + 0x10, (uint32_t)cli_readint32(loc_esi + 0x10) + loc_ebx_u);
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loc_ebx = loc_esi + 0x14;
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loc_esi = save2;
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/* loc_ebx_u gets saved */
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/* checked above, (...save2, 8) */
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save_edi = loc_edi = dest + ((uint32_t)cli_readint32(loc_esi) - base);
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loc_esi += 4;
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cli_dbgmsg("Upack: before_fixing\n");
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/* fix values */
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if (!CLI_ISCONTAINED(dest, dsize, loc_ebx - 4, (12 + 4 * 4)) || !CLI_ISCONTAINED(dest, dsize, loc_esi + 0x24, 4) || !CLI_ISCONTAINED(dest, dsize, loc_esi + 0x40, 4))
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return -1;
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for (j = 2; j < 6; j++)
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cli_writeint32(loc_ebx + (j << 2), cli_readint32(loc_ebx + (j << 2)));
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paddr = dest + cli_readint32(loc_ebx - 4) - base;
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save1 = loc_ecx;
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pushed_esi = loc_edi;
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end_edi = dest + cli_readint32(loc_esi + 0x24) - base;
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vma = cli_readint32(loc_ebx);
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cli_writeint32(loc_ebx, cli_readint32(loc_ebx + 4));
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cli_writeint32((loc_ebx + 4), vma);
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/* Upack 1.1/1.2 is something between 0.39 2-section and 0.39 3-section */
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} else if (upack_version == UPACK_11_12) {
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cli_dbgmsg("Upack v 1.1/1.2\n");
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loc_esi = dest + 0x148; /* always constant? */
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loc_edi = dest + cli_readint32(loc_esi) - base; /* read checked above */
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loc_esi += 4;
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save_edi = loc_edi;
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/* movsd */
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paddr = dest + ((uint32_t)cli_readint32(loc_esi)) - base;
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loc_esi += 4;
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loc_edi += 4;
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loc_ebx = loc_edi;
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if (((uint64_t)count + 6) * 4 > UINT_MAX)
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return -1;
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if (!CLI_ISCONTAINED(dest, dsize, loc_edi, ((6 + count) * 4)))
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return -1;
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cli_writeint32(loc_edi, 0xffffffff);
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loc_edi += 4;
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cli_writeint32(loc_edi, 0);
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loc_edi += 4;
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for (j = 0; j < 4; j++, loc_edi += 4)
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cli_writeint32(loc_edi, (1));
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for (j = 0; (uint32_t)j < count; j++, loc_edi += 4)
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cli_writeint32(loc_edi, 0x400);
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loc_edi = dest + cli_readint32(loc_esi) - base; /* read checked above */
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pushed_esi = loc_edi;
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loc_esi += 4;
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loc_ecx = 0;
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loc_esi += 4;
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end_edi = dest + cli_readint32(loc_esi - 0x28) - base; /* read checked above */
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loc_esi = save_edi;
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}
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if (loc_edi > end_edi) {
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cli_dbgmsg("Upack(alt begin): loc_edi > end_edi breaks cli_rebuildpe() bb#11216\n");
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return -1;
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}
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cli_dbgmsg("Upack: data initialized, before upack lzma call!\n");
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if ((ret = (uint32_t)unupack399(dest, dsize, loc_ecx, loc_ebx, loc_ecx, loc_edi, end_edi, shlsize, paddr)) == 0xffffffff)
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return -1;
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if (upack_version == UPACK_399)
|
|
save3 = cli_readint32(loc_esi + 0x40);
|
|
else if (upack_version == UPACK_11_12)
|
|
save3 = cli_readint32(dest + vma + ep + 0x174);
|
|
}
|
|
|
|
/* let's fix calls */
|
|
loc_ecx = 0;
|
|
if (!CLI_ISCONTAINED(dest, dsize, alvalue, 1)) {
|
|
cli_dbgmsg("Upack: alvalue out of bounds\n");
|
|
return -1;
|
|
}
|
|
|
|
searchval = *alvalue & 0xff;
|
|
cli_dbgmsg("Upack: loops: %08x search value: %02x\n", save3, searchval);
|
|
while (save3) {
|
|
if (!CLI_ISCONTAINED(dest, dsize, pushed_esi + loc_ecx, 1)) {
|
|
cli_dbgmsg("Upack: callfixerr %p %08x = %p, %p\n", dest, dsize, dest + dsize, pushed_esi + loc_ecx);
|
|
return -1;
|
|
}
|
|
if (pushed_esi[loc_ecx] == '\xe8' || pushed_esi[loc_ecx] == '\xe9') {
|
|
char *adr = (pushed_esi + loc_ecx + 1);
|
|
loc_ecx++;
|
|
if (!CLI_ISCONTAINED(dest, dsize, adr, 4)) {
|
|
cli_dbgmsg("Upack: callfixerr\n");
|
|
return -1;
|
|
}
|
|
if ((cli_readint32(adr) & 0xff) != searchval)
|
|
continue;
|
|
cli_writeint32(adr, EC32(CE32((uint32_t)(cli_readint32(adr) & 0xffffff00))) - loc_ecx - 4);
|
|
loc_ecx += 4;
|
|
save3--;
|
|
} else
|
|
loc_ecx++;
|
|
}
|
|
|
|
section.raw = 0;
|
|
section.rva = va;
|
|
section.rsz = end_edi - loc_edi;
|
|
section.vsz = end_edi - loc_edi;
|
|
|
|
/* bb#11282 - prevent dest+va/dest from passing an invalid dereference to cli_rebuildpe */
|
|
/* check should trigger on broken PE files where the section exists outside of the file */
|
|
if ((!upack && ((va + section.rsz) > dsize)) || (upack && (section.rsz > dsize))) {
|
|
cli_dbgmsg("Upack: Rebuilt section exceeds allocated buffer; breaks cli_rebuildpe() bb#11282\n");
|
|
return 0;
|
|
}
|
|
|
|
if (!cli_rebuildpe(dest + (upack ? 0 : va), §ion, 1, base, original_ep, 0, 0, file)) {
|
|
cli_dbgmsg("Upack: Rebuilding failed\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int unupack399(char *bs, uint32_t bl, uint32_t init_eax, char *init_ebx, uint32_t init_ecx, char *init_edi, char *end_edi, uint32_t shlsize, char *paddr)
|
|
{
|
|
struct lzmastate p;
|
|
uint32_t loc_eax, ret, loc_al, loc_ecx = init_ecx, loc_ebp, eax_copy = init_eax, temp, i, jakas_kopia;
|
|
uint32_t state[6], temp_ebp;
|
|
char *loc_edx, *loc_ebx = init_ebx, *loc_edi = init_edi, *loc_ebp8, *edi_copy;
|
|
p.p0 = paddr;
|
|
p.p1 = cli_readint32(init_ebx);
|
|
p.p2 = cli_readint32(init_ebx + 4);
|
|
|
|
cli_dbgmsg("\n\tp0: %p\n\tp1: %08x\n\tp2: %08x\n", p.p0, p.p1, p.p2);
|
|
for (i = 0; i < 6; i++) {
|
|
state[i] = cli_readint32(loc_ebx + (i << 2));
|
|
cli_dbgmsg("state[%d] = %08x\n", i, state[i]);
|
|
}
|
|
do {
|
|
loc_eax = eax_copy;
|
|
loc_edx = loc_ebx + (loc_eax << 2) + 0x58;
|
|
|
|
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
|
|
/* loc_483927 */
|
|
loc_al = loc_eax & 0xff;
|
|
loc_al = ((loc_al + 0xf9) > 0xff) ? (3 + 8) : 8;
|
|
loc_eax = (loc_eax & 0xffffff00) | (loc_al & 0xff);
|
|
loc_ebp = state[2];
|
|
loc_ecx = (loc_ecx & 0xffffff00) | 0x30;
|
|
loc_edx += loc_ecx;
|
|
/* *(uint32_t *)(loc_ebx + 14) = loc_ebp; ???? */
|
|
if (!(ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
|
|
/* loc_48397c */
|
|
loc_eax--;
|
|
/*
|
|
temp_ebp = loc_ebp; loc_ebp = cli_readint32(loc_ebx+0x0c); cli_writeint32(loc_ebx+0x0c, temp_ebp);
|
|
temp_ebp = loc_ebp; loc_ebp = cli_readint32(loc_ebx+0x10); cli_writeint32(loc_ebx+0x10, temp_ebp);
|
|
*/
|
|
temp_ebp = loc_ebp;
|
|
loc_ebp = state[4];
|
|
state[4] = state[3];
|
|
state[3] = temp_ebp;
|
|
eax_copy = loc_eax;
|
|
loc_edx = loc_ebx + 0xbc0;
|
|
state[5] = loc_ebp;
|
|
if (lzma_upack_esi_54(&p, loc_eax, &loc_ecx, &loc_edx, &temp, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
loc_ecx = 3;
|
|
jakas_kopia = temp;
|
|
loc_eax = temp - 1;
|
|
if (loc_eax >= loc_ecx)
|
|
loc_eax = loc_ecx;
|
|
loc_ecx = 0x40;
|
|
loc_eax <<= 6; /* ecx=0x40, mul cl */
|
|
loc_ebp8 = loc_ebx + ((loc_eax << 2) + 0x378);
|
|
if (lzma_upack_esi_50(&p, 1, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
loc_ebp = loc_eax;
|
|
if ((loc_eax & 0xff) >= 4) {
|
|
/* loc_4839af */
|
|
loc_ebp = 2 + (loc_eax & 1);
|
|
loc_eax >>= 1;
|
|
loc_eax--;
|
|
temp_ebp = loc_eax;
|
|
loc_eax = loc_ecx;
|
|
loc_ecx = temp_ebp;
|
|
loc_ebp <<= (loc_ecx & 0xff);
|
|
loc_edx = loc_ebx + (loc_ebp << 2) + 0x178;
|
|
if ((loc_ecx & 0xff) > 5) {
|
|
/* loc_4839c6 */
|
|
loc_ecx = (loc_ecx & 0xffffff00) | (((loc_ecx & 0xff) - 4) & 0xff);
|
|
loc_eax = 0;
|
|
do {
|
|
uint32_t temp_edx;
|
|
/* compare with lzma_upack_esi_00 */
|
|
/* do not put in one statement because of difference in signedness */
|
|
if (!CLI_ISCONTAINED(bs, bl, p.p0, 4))
|
|
return -1;
|
|
temp_edx = cli_readint32((char *)p.p0);
|
|
temp_edx = EC32(CE32(temp_edx));
|
|
p.p1 >>= 1;
|
|
temp_edx -= p.p2;
|
|
loc_eax <<= 1;
|
|
if (temp_edx >= p.p1) {
|
|
temp_edx = p.p1;
|
|
loc_eax++;
|
|
p.p2 += temp_edx;
|
|
}
|
|
if (((p.p1) & 0xff000000) == 0) {
|
|
p.p2 <<= 8;
|
|
p.p1 <<= 8;
|
|
p.p0++;
|
|
}
|
|
} while (--loc_ecx);
|
|
/* loc_4839e8 */
|
|
loc_ecx = (loc_ecx & 0xffffff00) | 4;
|
|
loc_eax <<= 4;
|
|
loc_ebp += loc_eax;
|
|
loc_edx = loc_ebx + 0x18;
|
|
}
|
|
/* loc4839f1 */
|
|
loc_eax = 1;
|
|
loc_eax <<= (loc_ecx & 0xff);
|
|
loc_ebp8 = loc_edx;
|
|
temp_ebp = loc_ecx;
|
|
loc_ecx = loc_eax;
|
|
loc_eax = temp_ebp;
|
|
if (lzma_upack_esi_50(&p, 1, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
/* cdq, loc_edx = (loc_eax&0x80000000)?0xffffffff:0; */
|
|
loc_ecx = temp_ebp;
|
|
temp_ebp = CLI_SRS((int32_t)loc_eax, 31); /* thx, desp */
|
|
/* loc_483a00 */
|
|
do {
|
|
temp_ebp += temp_ebp;
|
|
temp_ebp += (loc_eax & 1);
|
|
loc_eax >>= 1;
|
|
} while (--loc_ecx);
|
|
loc_ebp += temp_ebp;
|
|
/* loc_483a06 */
|
|
}
|
|
/* loc_483a09 */
|
|
loc_ebp++;
|
|
loc_ecx = jakas_kopia;
|
|
} else {
|
|
/* loc_48393a */
|
|
loc_edx += loc_ecx;
|
|
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
|
|
/* loc_483954 */
|
|
loc_edx += 0x60;
|
|
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
|
|
/* loc_48395e */
|
|
loc_edx += loc_ecx;
|
|
ret = lzma_upack_esi_00(&p, loc_edx, bs, bl);
|
|
temp_ebp = loc_ebp;
|
|
loc_ebp = state[4];
|
|
state[4] = state[3];
|
|
state[3] = temp_ebp;
|
|
if (ret) {
|
|
temp_ebp = loc_ebp;
|
|
loc_ebp = state[5];
|
|
state[5] = temp_ebp;
|
|
}
|
|
} else {
|
|
temp_ebp = loc_ebp;
|
|
loc_ebp = state[3];
|
|
state[3] = temp_ebp;
|
|
}
|
|
} else {
|
|
/* loc_483940 */
|
|
loc_edx += loc_ecx;
|
|
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
|
|
} else {
|
|
/* loc_483946 */
|
|
loc_eax |= 1;
|
|
eax_copy = loc_eax;
|
|
edi_copy = loc_edi;
|
|
edi_copy -= state[2];
|
|
loc_ecx = (loc_ecx & 0xffffff00) | 0x80;
|
|
if (!CLI_ISCONTAINED(bs, bl, edi_copy, 1) || !CLI_ISCONTAINED(bs, bl, loc_edi, 1))
|
|
return -1;
|
|
loc_al = (*(uint8_t *)edi_copy) & 0xff;
|
|
/* loc_483922 */
|
|
/* ok jmp to 483a19 */
|
|
/* loc_483a19 */
|
|
*loc_edi++ = loc_al;
|
|
continue;
|
|
}
|
|
}
|
|
/* loc_48396a */
|
|
eax_copy = loc_eax;
|
|
loc_edx = loc_ebx + 0x778;
|
|
if (lzma_upack_esi_54(&p, loc_eax, &loc_ecx, &loc_edx, &temp, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
loc_eax = loc_ecx;
|
|
loc_ecx = temp;
|
|
}
|
|
/* loc_483a0b */
|
|
if (!CLI_ISCONTAINED(bs, bl, loc_edi, loc_ecx) || !CLI_ISCONTAINED(bs, bl, loc_edi - loc_ebp, loc_ecx + 1))
|
|
return -1;
|
|
state[2] = loc_ebp;
|
|
for (i = 0; i < loc_ecx; i++, loc_edi++)
|
|
*loc_edi = *(loc_edi - loc_ebp);
|
|
loc_eax = (loc_eax & 0xffffff00) | *(uint8_t *)(loc_edi - loc_ebp);
|
|
loc_ecx = 0x80;
|
|
} else {
|
|
/* loc_4838d8 */
|
|
do {
|
|
if ((loc_al = (loc_eax & 0xff)) + 0xfd > 0xff)
|
|
loc_al -= 3; /* 0x100 - 0xfd = 3 */
|
|
else
|
|
loc_al = 0;
|
|
loc_eax = (loc_eax & 0xffffff00) | loc_al;
|
|
} while (loc_al >= 7);
|
|
/* loc_4838e2 */
|
|
eax_copy = loc_eax;
|
|
if (loc_edi > init_edi && loc_edi < bl + bs) {
|
|
loc_ebp = (*(uint8_t *)(loc_edi - 1)) >> shlsize;
|
|
} else {
|
|
loc_ebp = 0;
|
|
}
|
|
loc_ebp *= (int)0x300; /* XXX */
|
|
loc_ebp8 = loc_ebx + ((loc_ebp << 2) + 0x1008);
|
|
/* XXX save edi */
|
|
edi_copy = loc_edi;
|
|
|
|
loc_eax = (loc_eax & 0xffffff00) | 1;
|
|
if (loc_ecx) {
|
|
uint8_t loc_cl = loc_ecx & 0xff;
|
|
loc_edi -= state[2];
|
|
if (!CLI_ISCONTAINED(bs, bl, loc_edi, 1))
|
|
return -1;
|
|
do {
|
|
loc_eax = (loc_eax & 0xffff00ff) | ((*loc_edi & loc_cl) ? 0x200 : 0x100);
|
|
|
|
loc_edx = loc_ebp8 + (loc_eax << 2);
|
|
ret = lzma_upack_esi_00(&p, loc_edx, bs, bl);
|
|
loc_al = loc_eax & 0xff;
|
|
loc_al += loc_al;
|
|
loc_al += ret;
|
|
loc_al &= 0xff;
|
|
loc_eax = (loc_eax & 0xffffff00) | loc_al;
|
|
loc_cl >>= 1;
|
|
if (loc_cl) {
|
|
uint8_t loc_ah = (loc_eax >> 8) & 0xff;
|
|
loc_ah -= loc_al;
|
|
loc_ah &= 1;
|
|
if (!loc_ah) {
|
|
loc_eax = (loc_eax & 0xffff0000) | (loc_ah << 8) | loc_al;
|
|
/* loc_483918, loc_48391a */
|
|
if (lzma_upack_esi_50(&p, loc_eax, 0x100, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
} while (1);
|
|
} else {
|
|
/* loc_48391a */
|
|
loc_ecx = (loc_ecx & 0xffff00ff) | 0x100;
|
|
if (lzma_upack_esi_50(&p, loc_eax, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
|
|
return -1;
|
|
}
|
|
/* loc_48391f */
|
|
loc_ecx = 0;
|
|
loc_edi = edi_copy;
|
|
}
|
|
/* loc_483a19 */
|
|
/* 2GiM: i think this one is not properly checked, 2aCaB: true */
|
|
if (!CLI_ISCONTAINED(bs, bl, loc_edi, 1))
|
|
return -1;
|
|
*loc_edi++ = (loc_eax & 0xff);
|
|
} while (loc_edi < end_edi);
|
|
|
|
return 1;
|
|
}
|