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1439 lines
35 KiB
1439 lines
35 KiB
/*
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* Extract VBA source code for component MS Office Documents
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*
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* Copyright (C) 2004-2005 trog@uncon.org
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*
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* This code is based on the OpenOffice and libgsf sources.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <zlib.h>
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#include "clamav.h"
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#include "vba_extract.h"
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#include "others.h"
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#include "blob.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef HAVE_ATTRIB_PACKED
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#define __attribute__(x)
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#endif
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack(1)
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack 1
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#endif
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struct vba56_header {
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unsigned char magic[2];
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unsigned char version[4];
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uint16_t ooff __attribute__ ((packed)); /* 0x00FF */
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uint32_t LidA __attribute__ ((packed)); /* Language identifiers */
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uint32_t LidB __attribute__ ((packed));
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uint16_t CharSet __attribute__ ((packed));
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uint16_t LenA __attribute__ ((packed));
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uint32_t UnknownB __attribute__ ((packed));
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uint32_t UnknownC __attribute__ ((packed));
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uint16_t LenB __attribute__ ((packed));
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uint16_t LenC __attribute__ ((packed));
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uint16_t LenD __attribute__ ((packed));
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};
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack()
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack
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#endif
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typedef struct vba_version_tag {
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unsigned char signature[4];
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const char *name;
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int vba_version;
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int is_mac;
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} vba_version_t;
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static uint16_t vba_endian_convert_16(uint16_t value, int is_mac)
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{
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if (is_mac)
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return (uint16_t)be16_to_host(value);
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else
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return le16_to_host(value);
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}
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static uint32_t vba_endian_convert_32(uint32_t value, int is_mac)
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{
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if (is_mac)
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return be32_to_host(value);
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else
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return le32_to_host(value);
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}
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#define NUM_VBA_VERSIONS 14
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static const vba_version_t vba_version[NUM_VBA_VERSIONS] = {
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{ { 0x5e, 0x00, 0x00, 0x01 }, "Office 97", 5, FALSE},
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{ { 0x5f, 0x00, 0x00, 0x01 }, "Office 97 SR1", 5, FALSE },
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{ { 0x65, 0x00, 0x00, 0x01 }, "Office 2000 alpha?", 6, FALSE },
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{ { 0x6b, 0x00, 0x00, 0x01 }, "Office 2000 beta?", 6, FALSE },
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{ { 0x6d, 0x00, 0x00, 0x01 }, "Office 2000", 6, FALSE },
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{ { 0x6f, 0x00, 0x00, 0x01 }, "Office 2000", 6, FALSE },
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{ { 0x70, 0x00, 0x00, 0x01 }, "Office XP beta 1/2", 6, FALSE },
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{ { 0x73, 0x00, 0x00, 0x01 }, "Office XP", 6, FALSE },
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{ { 0x76, 0x00, 0x00, 0x01 }, "Office 2003", 6, FALSE },
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{ { 0x79, 0x00, 0x00, 0x01 }, "Office 2003", 6, FALSE },
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{ { 0x60, 0x00, 0x00, 0x0e }, "MacOffice 98", 5, TRUE },
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{ { 0x62, 0x00, 0x00, 0x0e }, "MacOffice 2001", 5, TRUE },
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{ { 0x63, 0x00, 0x00, 0x0e }, "MacOffice X", 6, TRUE },
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{ { 0x64, 0x00, 0x00, 0x0e }, "MacOffice 2004", 6, TRUE },
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};
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#define VBA56_DIRENT_RECORD_COUNT (2 + /* magic */ \
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4 + /* version */ \
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2 + /* 0x00 0xff */ \
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22) /* unknown */
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#define VBA56_DIRENT_HEADER_SIZE (VBA56_DIRENT_RECORD_COUNT + \
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2 + /* type1 record count */ \
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2) /* unknown */
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static char *
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get_unicode_name(const char *name, int size, int is_mac)
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{
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int i, j;
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char *newname;
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if (!name || *name == 0 || size <= 0) {
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return NULL;
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}
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newname = (char *) cli_malloc(size*7);
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if (!newname) {
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return NULL;
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}
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j=0;
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for (i=0 ; i < size; i += (is_mac ? 1 : 2) ) {
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if (isprint(name[i])) {
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newname[j++] = name[i];
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} else {
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if (name[i] < 10 && name[i] >= 0) {
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newname[j++] = '_';
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newname[j++] = (char)(name[i] + '0');
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}
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else {
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const uint16_t x = (uint16_t)(((name[i]) << 8) | name[i + 1]);
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newname[j++] = '_';
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newname[j++] = (char)('a'+((x&0xF)));
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newname[j++] = (char)('a'+((x>>4)&0xF));
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newname[j++] = (char)('a'+((x>>8)&0xF));
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#if 0
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newname[j++] = (char)('a'+((x>>16)&0xF)); /* FIXME: x>>16 MUST == 0 */
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newname[j++] = (char)('a'+((x>>24)&0xF)); /* FIXME: x>>24 MUST == 0 */
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#endif
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}
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newname[j++] = '_';
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}
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}
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newname[j] = '\0';
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return newname;
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}
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static void vba56_test_middle(int fd)
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{
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char test_middle[20];
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/* MacOffice middle */
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static const uint8_t middle1_str[20] = {
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0x00, 0x01, 0x0d, 0x45, 0x2e, 0xe1, 0xe0, 0x8f, 0x10, 0x1a,
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0x85, 0x2e, 0x02, 0x60, 0x8c, 0x4d, 0x0b, 0xb4, 0x00, 0x00
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};
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/* MS Office middle */
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static const uint8_t middle2_str[20] = {
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0x00, 0x00, 0xe1, 0x2e, 0x45, 0x0d, 0x8f, 0xe0, 0x1a, 0x10,
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0x85, 0x2e, 0x02, 0x60, 0x8c, 0x4d, 0x0b, 0xb4, 0x00, 0x00
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};
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if(cli_readn(fd, &test_middle, 20) != 20) {
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return;
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}
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if ((memcmp(test_middle, middle1_str, 20) != 0) &&
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(memcmp(test_middle, middle2_str, 20) != 0)) {
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cli_dbgmsg("middle not found\n");
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lseek(fd, -20, SEEK_CUR);
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} else {
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cli_dbgmsg("middle found\n");
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}
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return;
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}
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static int
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vba_read_project_strings(int fd, int is_mac)
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{
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for (;;) {
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uint32_t offset;
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uint16_t length;
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unsigned char *buff;
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char *name;
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if (cli_readn(fd, &length, 2) != 2) {
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return FALSE;
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}
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length = vba_endian_convert_16(length, is_mac);
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if (length < 6) {
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lseek(fd, -2, SEEK_CUR);
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break;
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}
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buff = (unsigned char *) cli_malloc(length);
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if (!buff) {
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cli_errmsg("cli_malloc failed\n");
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return FALSE;
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}
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offset = lseek(fd, 0, SEEK_CUR);
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if (cli_readn(fd, buff, length) != (int)length) {
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cli_dbgmsg("read name failed - rewinding\n");
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lseek(fd, offset, SEEK_SET);
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free(buff);
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break;
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}
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name = get_unicode_name((const char *)buff, length, is_mac);
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if (name)
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cli_dbgmsg("length: %d, name: %s\n", length, name);
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else
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cli_dbgmsg("length: %d, name: [null]\n", length);
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free(buff);
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/* Ignore twelve bytes from entries of type 'G'.
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Type 'C' entries come in pairs, the second also
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having a 12 byte trailer */
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/* TODO: Need to check if types H(same as G) and D(same as C) exist */
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if((name == NULL) || (memcmp("*\\", name, 2) != 0) ||
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(strchr("GCHD", name[2]) == NULL)) {
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/* Unknown type - probably ran out of strings - rewind */
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lseek(fd, -(length+2), SEEK_CUR);
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if(name)
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free(name);
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break;
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}
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free(name);
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if (cli_readn(fd, &length, 2) != 2)
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return FALSE;
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length = vba_endian_convert_16(length, is_mac);
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if ((length != 0) && (length != 65535)) {
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lseek(fd, -2, SEEK_CUR);
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continue;
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}
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offset = lseek(fd, 10, SEEK_CUR);
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cli_dbgmsg("offset: %u\n", offset);
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vba56_test_middle(fd);
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}
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return TRUE;
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}
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vba_project_t *vba56_dir_read(const char *dir)
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{
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unsigned char *buff;
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const unsigned char vba56_signature[] = { 0xcc, 0x61 };
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uint16_t record_count, length;
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uint16_t ffff;
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uint16_t byte_count;
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uint32_t offset;
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int i, fd, is_mac;
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vba_project_t *vba_project;
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struct vba56_header v56h;
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char fullname[NAME_MAX + 1];
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cli_dbgmsg("in vba56_dir_read()\n");
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snprintf(fullname, sizeof(fullname) - 1, "%s/_VBA_PROJECT", dir);
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fd = open(fullname, O_RDONLY|O_BINARY);
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if (fd == -1) {
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cli_dbgmsg("Can't open %s\n", fullname);
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/* vba56_old_dir_read(dir); */
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return NULL;
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}
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if(cli_readn(fd, &v56h, sizeof(struct vba56_header)) != sizeof(struct vba56_header)) {
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close(fd);
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return NULL;
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}
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if (memcmp(v56h.magic, vba56_signature, sizeof(v56h.magic)) != 0) {
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close(fd);
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return NULL;
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}
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for(i = 0; i < NUM_VBA_VERSIONS; i++)
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if(memcmp(v56h.version, vba_version[i].signature, sizeof(vba_version[i].signature)) == 0)
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break;
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if (i == NUM_VBA_VERSIONS) {
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cli_warnmsg("Unknown VBA version signature %x %x %x %x\n",
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v56h.version[0], v56h.version[1],
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v56h.version[2], v56h.version[3]);
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switch(v56h.version[3]) {
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case 0x01:
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cli_warnmsg("Guessing little-endian\n");
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is_mac = FALSE;
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break;
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case 0x0E:
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cli_warnmsg("Guessing big-endian\n");
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is_mac = TRUE;
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break;
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default:
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cli_warnmsg("Unable to guess VBA type\n");
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close(fd);
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return NULL;
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}
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} else {
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cli_dbgmsg("VBA Project: %s, VBA Version=%d\n", vba_version[i].name,
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vba_version[i].vba_version);
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is_mac = vba_version[i].is_mac;
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}
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if (!vba_read_project_strings(fd, is_mac)) {
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close(fd);
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return NULL;
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}
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/* junk some more stuff */
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do {
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if (cli_readn(fd, &ffff, 2) != 2) {
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close(fd);
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return NULL;
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}
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} while(ffff != 0xFFFF);
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/* check for alignment error */
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lseek(fd, -3, SEEK_CUR);
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if (cli_readn(fd, &ffff, 2) != 2) {
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close(fd);
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return NULL;
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}
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if (ffff != 0xFFFF) {
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lseek(fd, 1, SEEK_CUR);
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}
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if (cli_readn(fd, &ffff, 2) != 2) {
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close(fd);
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return NULL;
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}
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/* no idea what this stuff is */
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if (ffff != 0xFFFF) {
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ffff = vba_endian_convert_16(ffff, is_mac);
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lseek(fd, ffff, SEEK_CUR);
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}
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if (cli_readn(fd, &ffff, 2) != 2) {
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close(fd);
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return NULL;
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}
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if (ffff != 0xFFFF) {
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ffff = vba_endian_convert_16(ffff, is_mac);
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lseek(fd, ffff, SEEK_CUR);
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}
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lseek(fd, 100, SEEK_CUR);
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if (cli_readn(fd, &record_count, 2) != 2) {
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close(fd);
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return NULL;
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}
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record_count = vba_endian_convert_16(record_count, is_mac);
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cli_dbgmsg("\nVBA Record count: %d\n", record_count);
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if (record_count == 0) {
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close(fd);
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return NULL;
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}
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if (record_count > 1000) {
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/* Almost certainly an error */
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cli_dbgmsg("\nVBA Record count too big");
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close(fd);
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return NULL;
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}
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vba_project = (vba_project_t *) cli_malloc(sizeof(struct vba_project_tag));
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if (!vba_project) {
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close(fd);
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return NULL;
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}
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vba_project->name = (char **) cli_malloc(sizeof(char *) * record_count);
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if (!vba_project->name) {
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free(vba_project);
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close(fd);
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return NULL;
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}
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vba_project->dir = cli_strdup(dir);
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vba_project->offset = (uint32_t *) cli_malloc (sizeof(uint32_t) *
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record_count);
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if (!vba_project->offset) {
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free(vba_project->dir);
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free(vba_project->name);
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free(vba_project);
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close(fd);
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return NULL;
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}
|
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vba_project->count = record_count;
|
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for(i = 0; i < record_count; i++) {
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if(cli_readn(fd, &length, 2) != 2)
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break;
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length = vba_endian_convert_16(length, is_mac);
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if (length == 0) {
|
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cli_dbgmsg("zero name length\n");
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break;
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}
|
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buff = (unsigned char *) cli_malloc(length);
|
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if (!buff) {
|
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cli_dbgmsg("cli_malloc failed\n");
|
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break;
|
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}
|
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if (cli_readn(fd, buff, length) != length) {
|
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cli_dbgmsg("read name failed\n");
|
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free(buff);
|
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break;
|
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}
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vba_project->name[i] = get_unicode_name((const char *)buff, length, is_mac);
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free(buff);
|
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if (!vba_project->name[i]) {
|
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offset = lseek(fd, 0, SEEK_CUR);
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vba_project->name[i] = (char *) cli_malloc(18);
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if(vba_project->name[i] == NULL) {
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break;
|
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}
|
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snprintf(vba_project->name[i], 18, "clamav-%.10d", (int)offset);
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}
|
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cli_dbgmsg("project name: %s, ", vba_project->name[i]);
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|
|
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/* some kind of string identifier ?? */
|
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if (cli_readn(fd, &length, 2) != 2) {
|
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free(vba_project->name[i]);
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break;
|
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}
|
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length = vba_endian_convert_16(length, is_mac);
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lseek(fd, length, SEEK_CUR);
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|
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/* unknown stuff */
|
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if (cli_readn(fd, &ffff, 2) != 2) {
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free(vba_project->name[i]);
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break;
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}
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ffff = vba_endian_convert_16(ffff, is_mac);
|
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if (ffff == 0xFFFF) {
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lseek(fd, 2, SEEK_CUR);
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if (cli_readn(fd, &ffff, 2) != 2) {
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free(vba_project->name[i]);
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break;
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}
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ffff = vba_endian_convert_16(ffff, is_mac);
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lseek(fd, ffff, SEEK_CUR);
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} else {
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lseek(fd, 2 + ffff, SEEK_CUR);
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}
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|
|
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lseek(fd, 8, SEEK_CUR);
|
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if (cli_readn(fd, &byte_count, 2) != 2) {
|
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free(vba_project->name[i]);
|
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break;
|
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}
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byte_count = vba_endian_convert_16(byte_count, is_mac);
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lseek(fd, (8 * byte_count) + 5, SEEK_CUR);
|
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if (cli_readn(fd, &offset, 4) != 4) {
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free(vba_project->name[i]);
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break;
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}
|
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offset = vba_endian_convert_32(offset, is_mac);
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vba_project->offset[i] = offset;
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cli_dbgmsg("offset:%u\n", offset);
|
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lseek(fd, 2, SEEK_CUR);
|
|
}
|
|
|
|
close(fd);
|
|
|
|
if(i < record_count) {
|
|
/* above loop failed */
|
|
while(--i >= 0)
|
|
free(vba_project->name[i]);
|
|
|
|
free(vba_project->name);
|
|
free(vba_project->dir);
|
|
free(vba_project->offset);
|
|
free(vba_project);
|
|
return NULL;
|
|
}
|
|
|
|
return vba_project;
|
|
}
|
|
|
|
#define VBA_COMPRESSION_WINDOW 4096
|
|
|
|
unsigned char *vba_decompress(int fd, uint32_t offset, int *size)
|
|
{
|
|
unsigned int i, pos=0, shift, win_pos, clean=TRUE, mask, distance;
|
|
uint8_t flag;
|
|
uint16_t token, len;
|
|
size_t s;
|
|
blob *b;
|
|
unsigned char *ret;
|
|
unsigned char buffer[VBA_COMPRESSION_WINDOW];
|
|
|
|
b = blobCreate();
|
|
|
|
if(b == NULL)
|
|
return NULL;
|
|
|
|
lseek(fd, offset+3, SEEK_SET); /* 1byte ?? , 2byte length ?? */
|
|
|
|
while (cli_readn(fd, &flag, 1) == 1) {
|
|
for (mask = 1; mask < 0x100; mask<<=1) {
|
|
if (flag & mask) {
|
|
if (cli_readn(fd, &token, 2) != 2) {
|
|
blobDestroy(b);
|
|
if (size) {
|
|
*size = 0;
|
|
}
|
|
return NULL;
|
|
}
|
|
token = vba_endian_convert_16(token, FALSE);
|
|
win_pos = pos % VBA_COMPRESSION_WINDOW;
|
|
if (win_pos <= 0x80) {
|
|
if (win_pos <= 0x20) {
|
|
shift = (win_pos <= 0x10) ? 12:11;
|
|
} else {
|
|
shift = (win_pos <= 0x40) ? 10:9;
|
|
}
|
|
} else {
|
|
if (win_pos <= 0x200) {
|
|
shift = (win_pos <= 0x100) ? 8:7;
|
|
} else if (win_pos <= 0x800) {
|
|
shift = (win_pos <= 0x400) ? 6:5;
|
|
} else {
|
|
shift = 4;
|
|
}
|
|
}
|
|
len = (uint16_t)((token & ((1 << shift) -1)) + 3);
|
|
distance = token >> shift;
|
|
clean = TRUE;
|
|
|
|
for (i=0 ; i < len; i++) {
|
|
unsigned int srcpos;
|
|
unsigned char c;
|
|
|
|
srcpos = (pos - distance - 1) % VBA_COMPRESSION_WINDOW;
|
|
c = buffer[srcpos];
|
|
buffer[pos++ % VBA_COMPRESSION_WINDOW]= c;
|
|
}
|
|
} else {
|
|
if ((pos != 0) &&
|
|
((pos % VBA_COMPRESSION_WINDOW) == 0) && clean) {
|
|
|
|
if (cli_readn(fd, &token, 2) != 2) {
|
|
blobDestroy(b);
|
|
if(size)
|
|
*size = 0;
|
|
return NULL;
|
|
}
|
|
clean = FALSE;
|
|
(void)blobAddData(b, buffer, VBA_COMPRESSION_WINDOW);
|
|
break;
|
|
}
|
|
if (cli_readn(fd, buffer+(pos%VBA_COMPRESSION_WINDOW), 1) == 1){
|
|
pos++;
|
|
}
|
|
clean = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pos % VBA_COMPRESSION_WINDOW)
|
|
if(blobAddData(b, buffer, pos%VBA_COMPRESSION_WINDOW) < 0) {
|
|
if(size)
|
|
*size = 0;
|
|
blobDestroy(b);
|
|
return NULL;
|
|
}
|
|
s = blobGetDataSize(b);
|
|
ret = cli_malloc(s);
|
|
if(ret == NULL) {
|
|
blobDestroy(b);
|
|
if(size)
|
|
*size = 0;
|
|
return NULL;
|
|
}
|
|
if(size)
|
|
*size = (int)s;
|
|
memcpy(ret, blobGetData(b), s);
|
|
blobDestroy(b);
|
|
return ret;
|
|
}
|
|
|
|
static uint32_t ole_copy_file_data(int ifd, int ofd, uint32_t len)
|
|
{
|
|
unsigned int count, rem;
|
|
unsigned char data[FILEBUFF];
|
|
|
|
rem = len;
|
|
|
|
while (rem > 0) {
|
|
unsigned int todo = MIN(sizeof(data), rem);
|
|
|
|
count = cli_readn(ifd, data, todo);
|
|
if (count != todo) {
|
|
return len-rem;
|
|
}
|
|
if((unsigned int)cli_writen(ofd, data, count) != count)
|
|
return len-rem-count;
|
|
rem -= count;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
int cli_decode_ole_object(int fd, const char *dir)
|
|
{
|
|
int ofd;
|
|
struct stat statbuf;
|
|
char ch, *fullname;
|
|
uint32_t object_size;
|
|
|
|
if (fstat(fd, &statbuf) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
if (cli_readn(fd, &object_size, 4) != 4) {
|
|
return -1;
|
|
}
|
|
object_size = vba_endian_convert_32(object_size, FALSE);
|
|
|
|
if ((statbuf.st_size - object_size) >= 4) {
|
|
/* Probably the OLE type id */
|
|
if (lseek(fd, 2, SEEK_CUR) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
/* Skip attachment name */
|
|
do {
|
|
if (cli_readn(fd, &ch, 1) != 1) {
|
|
return -1;
|
|
}
|
|
} while (ch);
|
|
|
|
/* Skip attachment full path */
|
|
do {
|
|
if (cli_readn(fd, &ch, 1) != 1) {
|
|
return -1;
|
|
}
|
|
} while (ch);
|
|
|
|
/* Skip unknown data */
|
|
if (lseek(fd, 8, SEEK_CUR) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
/* Skip attachment full path */
|
|
do {
|
|
if (cli_readn(fd, &ch, 1) != 1) {
|
|
return -1;
|
|
}
|
|
} while (ch);
|
|
|
|
if (cli_readn(fd, &object_size, 4) != 4) {
|
|
return -1;
|
|
}
|
|
object_size = vba_endian_convert_32(object_size, FALSE);
|
|
}
|
|
fullname = cli_malloc(strlen(dir) + 18);
|
|
if(fullname == NULL)
|
|
return -1;
|
|
sprintf(fullname, "%s/_clam_ole_object", dir);
|
|
ofd = open(fullname, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0600);
|
|
free(fullname);
|
|
if (ofd < 0) {
|
|
return -1;
|
|
}
|
|
ole_copy_file_data(fd, ofd, object_size);
|
|
lseek(ofd, 0, SEEK_SET);
|
|
return ofd;
|
|
}
|
|
|
|
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
|
|
/* Code to extract Power Point Embedded OLE2 Objects */
|
|
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
|
|
|
|
typedef struct atom_header_tag {
|
|
off_t foffset;
|
|
uint16_t ver_inst;
|
|
uint8_t version;
|
|
uint16_t instance;
|
|
uint16_t type;
|
|
uint32_t length;
|
|
} atom_header_t;
|
|
|
|
static int ppt_read_atom_header(int fd, atom_header_t *atom_header)
|
|
{
|
|
atom_header->foffset = lseek(fd, 0, SEEK_CUR);
|
|
if (cli_readn(fd, &atom_header->ver_inst, 2) != 2) {
|
|
cli_dbgmsg("read ppt_current_user failed\n");
|
|
return FALSE;
|
|
}
|
|
atom_header->ver_inst = vba_endian_convert_16(atom_header->ver_inst, FALSE);
|
|
atom_header->version = (uint8_t)(atom_header->ver_inst & 0x000f);
|
|
atom_header->instance = (uint16_t)(atom_header->ver_inst >> 4);
|
|
if(cli_readn(fd, &atom_header->type, sizeof(uint16_t)) != sizeof(uint16_t)) {
|
|
cli_dbgmsg("read ppt_current_user failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, &atom_header->length, 4) != 4) {
|
|
cli_dbgmsg("read ppt_current_user failed\n");
|
|
return FALSE;
|
|
}
|
|
atom_header->type = vba_endian_convert_16(atom_header->type, FALSE);
|
|
atom_header->length = vba_endian_convert_32(atom_header->length, FALSE);
|
|
return TRUE;
|
|
}
|
|
|
|
static void ppt_print_atom_header(atom_header_t *atom_header)
|
|
{
|
|
cli_dbgmsg("Atom Hdr:\n");
|
|
cli_dbgmsg(" Version: 0x%.2x\n", atom_header->version);
|
|
cli_dbgmsg(" Instance: 0x%.4x\n", atom_header->instance);
|
|
cli_dbgmsg(" Type: 0x%.4x\n", atom_header->type);
|
|
cli_dbgmsg(" Length: 0x%.8x\n", atom_header->length);
|
|
}
|
|
|
|
#define PPT_LZW_BUFFSIZE 8192
|
|
static int ppt_unlzw(const char *dir, int fd, uint32_t length)
|
|
{
|
|
int ofd, retval;
|
|
unsigned char inbuff[PPT_LZW_BUFFSIZE], outbuff[PPT_LZW_BUFFSIZE];
|
|
char *fullname;
|
|
uint32_t bufflen;
|
|
z_stream stream;
|
|
|
|
fullname = cli_malloc(strlen(dir) + 17);
|
|
if (!fullname) {
|
|
return FALSE;
|
|
}
|
|
sprintf(fullname, "%s/ppt%.8lx.doc", dir, (long)lseek(fd, 0L, SEEK_CUR));
|
|
|
|
ofd = open(fullname, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0600);
|
|
free(fullname);
|
|
if (ofd == -1) {
|
|
cli_dbgmsg("ppt_unlzw Open outfile failed\n");
|
|
return FALSE;
|
|
}
|
|
|
|
stream.zalloc = Z_NULL;
|
|
stream.zfree = Z_NULL;
|
|
stream.opaque = (void *)0;
|
|
|
|
stream.next_in = inbuff;
|
|
bufflen = stream.avail_in = MIN(length, PPT_LZW_BUFFSIZE);
|
|
|
|
if (cli_readn(fd, inbuff, stream.avail_in) != (int64_t)stream.avail_in) {
|
|
close(ofd);
|
|
unlink(fullname);
|
|
return FALSE;
|
|
}
|
|
length -= stream.avail_in;
|
|
|
|
retval = inflateInit(&stream);
|
|
if (retval != Z_OK) {
|
|
cli_dbgmsg(" ppt_unlzw !Z_OK: %d\n", retval);
|
|
}
|
|
|
|
stream.next_out = outbuff;
|
|
stream.avail_out = PPT_LZW_BUFFSIZE;
|
|
|
|
do {
|
|
if (stream.avail_out == 0) {
|
|
if (cli_writen(ofd, outbuff, PPT_LZW_BUFFSIZE)
|
|
!= PPT_LZW_BUFFSIZE) {
|
|
close(ofd);
|
|
inflateEnd(&stream);
|
|
return FALSE;
|
|
}
|
|
stream.next_out = outbuff;
|
|
stream.avail_out = PPT_LZW_BUFFSIZE;
|
|
}
|
|
if (stream.avail_in == 0) {
|
|
stream.next_in = inbuff;
|
|
bufflen = stream.avail_in = MIN(length, PPT_LZW_BUFFSIZE);
|
|
if (cli_readn(fd, inbuff, stream.avail_in) != (int64_t)stream.avail_in) {
|
|
close(ofd);
|
|
inflateEnd(&stream);
|
|
return FALSE;
|
|
}
|
|
length -= stream.avail_in;
|
|
}
|
|
retval = inflate(&stream, Z_NO_FLUSH);
|
|
} while (retval == Z_OK);
|
|
|
|
if (cli_writen(ofd, outbuff, bufflen) != (int64_t)bufflen) {
|
|
close(ofd);
|
|
inflateEnd(&stream);
|
|
return FALSE;
|
|
}
|
|
inflateEnd(&stream);
|
|
return close(ofd);
|
|
}
|
|
|
|
static char *ppt_stream_iter(int fd)
|
|
{
|
|
uint32_t ole_id;
|
|
char *out_dir;
|
|
off_t offset;
|
|
atom_header_t atom_header;
|
|
|
|
/* Create a directory to store the extracted OLE2 objects */
|
|
out_dir = cli_gentemp(NULL);
|
|
if(mkdir(out_dir, 0700)) {
|
|
cli_errmsg("ScanOLE2 -> Can't create temporary directory %s\n", out_dir);
|
|
free(out_dir);
|
|
return NULL;
|
|
}
|
|
|
|
while(ppt_read_atom_header(fd, &atom_header)) {
|
|
ppt_print_atom_header(&atom_header);
|
|
|
|
if (atom_header.length == 0) {
|
|
cli_rmdirs(out_dir);
|
|
free(out_dir);
|
|
return NULL;
|
|
}
|
|
|
|
if (atom_header.type == 0x1011) {
|
|
if (cli_readn(fd, &ole_id, 4) != 4) {
|
|
cli_dbgmsg("read ole_id failed\n");
|
|
cli_rmdirs(out_dir);
|
|
free(out_dir);
|
|
return NULL;
|
|
}
|
|
ole_id = vba_endian_convert_32(ole_id, FALSE);
|
|
cli_dbgmsg("OleID: %d, length: %d\n",
|
|
(int)ole_id, (int)atom_header.length-4);
|
|
if (!ppt_unlzw(out_dir, fd, atom_header.length-4)) {
|
|
cli_dbgmsg("ppt_unlzw failed\n");
|
|
cli_rmdirs(out_dir);
|
|
free(out_dir);
|
|
return NULL;
|
|
}
|
|
|
|
} else {
|
|
offset = lseek(fd, 0, SEEK_CUR);
|
|
/* Check we don't wrap */
|
|
if ((offset + (off_t)atom_header.length) < offset) {
|
|
break;
|
|
}
|
|
offset += atom_header.length;
|
|
if (lseek(fd, offset, SEEK_SET) != offset ) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return out_dir;
|
|
}
|
|
|
|
char *ppt_vba_read(const char *dir)
|
|
{
|
|
char *out_dir;
|
|
int fd;
|
|
char fullname[NAME_MAX + 1];
|
|
|
|
snprintf(fullname, sizeof(fullname) - 1, "%s/PowerPoint Document", dir);
|
|
fd = open(fullname, O_RDONLY|O_BINARY);
|
|
if (fd == -1) {
|
|
cli_dbgmsg("Open PowerPoint Document failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
out_dir = ppt_stream_iter(fd);
|
|
close(fd);
|
|
return out_dir;
|
|
}
|
|
|
|
|
|
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
|
|
/* Code to extract Word6 macros */
|
|
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
|
|
|
|
typedef struct mso_fib_tag {
|
|
char ununsed[sizeof(uint16_t) + sizeof(uint16_t) +
|
|
sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint16_t) +
|
|
sizeof(uint16_t)];
|
|
uint32_t macro_offset;
|
|
uint32_t macro_len;
|
|
} mso_fib_t;
|
|
|
|
typedef struct macro_entry_tag {
|
|
unsigned char version;
|
|
unsigned char key;
|
|
uint16_t intname_i;
|
|
uint16_t extname_i;
|
|
uint16_t xname_i;
|
|
uint32_t unknown;
|
|
uint32_t len;
|
|
uint32_t state;
|
|
uint32_t offset;
|
|
} macro_entry_t;
|
|
|
|
typedef struct macro_info_tag {
|
|
uint16_t count;
|
|
struct macro_entry_tag *macro_entry;
|
|
} macro_info_t;
|
|
|
|
#if 0
|
|
typedef struct macro_extname_tag {
|
|
uint8_t length;
|
|
unsigned char *extname;
|
|
uint16_t numref;
|
|
} macro_extname_t;
|
|
|
|
typedef struct macro_extnames_tag {
|
|
uint16_t count;
|
|
struct macro_extname_tag *macro_extname;
|
|
} macro_extnames_t;
|
|
#endif
|
|
|
|
typedef struct macro_intnames_tag {
|
|
uint16_t count;
|
|
struct macro_intname_tag *macro_intname;
|
|
} macro_intnames_t;
|
|
|
|
typedef struct macro_intname_tag {
|
|
uint16_t id;
|
|
uint8_t length;
|
|
unsigned char *intname;
|
|
} macro_intname_t;
|
|
|
|
typedef struct menu_entry_tag {
|
|
uint16_t context;
|
|
uint16_t menu;
|
|
uint16_t extname_i;
|
|
uint16_t unknown;
|
|
uint16_t intname_i;
|
|
uint16_t pos;
|
|
} menu_entry_t;
|
|
|
|
typedef struct mac_token_tag {
|
|
unsigned char token;
|
|
unsigned char *str;
|
|
} mac_token_t;
|
|
|
|
typedef struct mac_token2_tag {
|
|
uint16_t token;
|
|
unsigned char *str;
|
|
|
|
} mac_token2_t;
|
|
|
|
static void wm_free_intnames(macro_intnames_t *macro_intnames);
|
|
static void wm_free_macro_info(macro_info_t *macro_info);
|
|
|
|
static void wm_print_fib(mso_fib_t *fib)
|
|
{
|
|
cli_dbgmsg("macro offset: 0x%.4x\n", fib->macro_offset);
|
|
cli_dbgmsg("macro len: 0x%.4x\n\n", fib->macro_len);
|
|
}
|
|
|
|
static int wm_read_fib(int fd, mso_fib_t *fib)
|
|
{
|
|
/* don't need the information is this block, so seek forward */
|
|
if (lseek(fd, 0x118, SEEK_SET) != 0x118) {
|
|
cli_dbgmsg("lseek wm_fib failed\n");
|
|
return FALSE;
|
|
}
|
|
|
|
if (cli_readn(fd, &fib->macro_offset, 4) != 4) {
|
|
cli_dbgmsg("read wm_fib failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, &fib->macro_len, 4) != 4) {
|
|
cli_dbgmsg("read wm_fib failed\n");
|
|
return FALSE;
|
|
}
|
|
fib->macro_offset = vba_endian_convert_32(fib->macro_offset, FALSE);
|
|
fib->macro_len = vba_endian_convert_32(fib->macro_len, FALSE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int wm_read_macro_entry(int fd, macro_entry_t *macro_entry)
|
|
{
|
|
if (cli_readn(fd, ¯o_entry->version, 1) != 1) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->key, 1) != 1) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->intname_i, 2) != 2) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->extname_i, 2) != 2) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->xname_i, 2) != 2) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->unknown, 4) != 4) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->len, 4) != 4) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->state, 4) != 4) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
if (cli_readn(fd, ¯o_entry->offset, 4) != 4) {
|
|
cli_dbgmsg("read macro_entry failed\n");
|
|
return FALSE;
|
|
}
|
|
|
|
macro_entry->intname_i = vba_endian_convert_16(macro_entry->intname_i, FALSE);
|
|
macro_entry->extname_i = vba_endian_convert_16(macro_entry->extname_i, FALSE);
|
|
macro_entry->xname_i = vba_endian_convert_16(macro_entry->xname_i, FALSE);
|
|
macro_entry->len = vba_endian_convert_32(macro_entry->len, FALSE);
|
|
macro_entry->state = vba_endian_convert_32(macro_entry->state, FALSE);
|
|
macro_entry->offset = vba_endian_convert_32(macro_entry->offset, FALSE);
|
|
return TRUE;
|
|
}
|
|
|
|
static macro_info_t *wm_read_macro_info(int fd)
|
|
{
|
|
int i;
|
|
macro_info_t *macro_info;
|
|
|
|
macro_info = (macro_info_t *) cli_malloc(sizeof(macro_info_t));
|
|
if (!macro_info) {
|
|
return NULL;
|
|
}
|
|
if (cli_readn(fd, ¯o_info->count, 2) != 2) {
|
|
cli_dbgmsg("read macro_info failed\n");
|
|
free(macro_info);
|
|
return NULL;
|
|
}
|
|
macro_info->count = vba_endian_convert_16(macro_info->count, FALSE);
|
|
cli_dbgmsg("macro count: %d\n", macro_info->count);
|
|
macro_info->macro_entry = (macro_entry_t *)
|
|
cli_malloc(sizeof(macro_entry_t) * macro_info->count);
|
|
if (!macro_info->macro_entry) {
|
|
free(macro_info);
|
|
return NULL;
|
|
}
|
|
for (i=0 ; i < macro_info->count ; i++) {
|
|
if (!wm_read_macro_entry(fd,
|
|
¯o_info->macro_entry[i])) {
|
|
wm_free_macro_info(macro_info);
|
|
return NULL;
|
|
}
|
|
}
|
|
return macro_info;
|
|
}
|
|
|
|
static void
|
|
wm_free_macro_info(macro_info_t *macro_info)
|
|
{
|
|
if (macro_info) {
|
|
free(macro_info->macro_entry);
|
|
free(macro_info);
|
|
}
|
|
}
|
|
|
|
static int wm_read_oxo3(int fd)
|
|
{
|
|
uint8_t count;
|
|
|
|
if (cli_readn(fd, &count, 1) != 1) {
|
|
cli_dbgmsg("read oxo3 record1 failed\n");
|
|
return FALSE;
|
|
}
|
|
if (lseek(fd, count*14, SEEK_CUR) == -1) {
|
|
cli_dbgmsg("lseek oxo3 record1 failed\n");
|
|
return FALSE;
|
|
}
|
|
cli_dbgmsg("oxo3 records1: %d\n", count);
|
|
|
|
if (cli_readn(fd, &count, 1) != 1) {
|
|
cli_dbgmsg("read oxo3 record2 failed\n");
|
|
return FALSE;
|
|
}
|
|
if (count == 0) {
|
|
if (cli_readn(fd, &count, 1) != 1) {
|
|
cli_dbgmsg("read oxo3 failed\n");
|
|
return FALSE;
|
|
}
|
|
if (count != 2) {
|
|
lseek(fd, -1, SEEK_CUR);
|
|
return TRUE;
|
|
}
|
|
if (cli_readn(fd, &count, 1) != 1) {
|
|
cli_dbgmsg("read oxo3 failed\n");
|
|
return FALSE;
|
|
}
|
|
}
|
|
if (count > 0) {
|
|
if (lseek(fd, (count*4)+1, SEEK_CUR) == -1) {
|
|
cli_dbgmsg("lseek oxo3 failed\n");
|
|
return FALSE;
|
|
}
|
|
}
|
|
cli_dbgmsg("oxo3 records2: %d\n", count);
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
wm_skip_menu_info(int fd)
|
|
{
|
|
uint16_t count;
|
|
|
|
if (cli_readn(fd, &count, sizeof(uint16_t)) != sizeof(uint16_t)) {
|
|
cli_dbgmsg("read menu_info failed\n");
|
|
return FALSE;
|
|
}
|
|
count = vba_endian_convert_16(count, FALSE);
|
|
cli_dbgmsg("menu_info count: %d\n", count);
|
|
|
|
if(count)
|
|
if(lseek(fd, count * 12, SEEK_CUR) == -1)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
wm_skip_macro_extnames(int fd)
|
|
{
|
|
int is_unicode;
|
|
int16_t size;
|
|
off_t offset_end = lseek(fd, 0, SEEK_CUR);
|
|
|
|
if(cli_readn(fd, &size, sizeof(int16_t)) != sizeof(int16_t)) {
|
|
cli_dbgmsg("read macro_extnames failed\n");
|
|
return FALSE;
|
|
}
|
|
size = vba_endian_convert_16(size, FALSE);
|
|
if (size == -1) { /* Unicode flag */
|
|
if(cli_readn(fd, &size, sizeof(int16_t)) != sizeof(int16_t)) {
|
|
cli_dbgmsg("read macro_extnames failed\n");
|
|
return FALSE;
|
|
}
|
|
size = vba_endian_convert_16(size, FALSE);
|
|
is_unicode = 1;
|
|
} else
|
|
is_unicode = 0;
|
|
|
|
cli_dbgmsg("ext names size: 0x%x\n", size);
|
|
|
|
offset_end += size;
|
|
while(lseek(fd, 0, SEEK_CUR) < offset_end) {
|
|
uint8_t length;
|
|
off_t offset;
|
|
|
|
if (cli_readn(fd, &length, 1) != 1) {
|
|
cli_dbgmsg("read macro_extnames failed\n");
|
|
return FALSE;
|
|
}
|
|
|
|
if(is_unicode)
|
|
offset = length * 2 + 1;
|
|
else
|
|
offset = length;
|
|
|
|
offset += sizeof(uint16_t); /* numref */
|
|
if(lseek(fd, offset, SEEK_CUR) == -1) {
|
|
cli_dbgmsg("read macro_extnames failed to seek\n");
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static macro_intnames_t *wm_read_macro_intnames(int fd)
|
|
{
|
|
uint16_t i, junk;
|
|
macro_intnames_t *macro_intnames;
|
|
macro_intname_t *macro_intname;
|
|
|
|
macro_intnames = (macro_intnames_t *) cli_malloc(sizeof(macro_intnames_t));
|
|
if (!macro_intnames) {
|
|
return NULL;
|
|
}
|
|
|
|
if (cli_readn(fd, ¯o_intnames->count, 2) != 2) {
|
|
cli_dbgmsg("read macro_intnames failed\n");
|
|
return NULL;
|
|
}
|
|
macro_intnames->count = vba_endian_convert_16(macro_intnames->count, FALSE);
|
|
cli_dbgmsg("int names count: %d\n", macro_intnames->count);
|
|
|
|
macro_intnames->macro_intname =
|
|
(macro_intname_t *) cli_malloc(sizeof(macro_intname_t) * macro_intnames->count);
|
|
if (!macro_intnames->macro_intname) {
|
|
free(macro_intnames);
|
|
return NULL;
|
|
}
|
|
for (i=0 ; i < macro_intnames->count ; i++) {
|
|
macro_intname = ¯o_intnames->macro_intname[i];
|
|
if (cli_readn(fd, ¯o_intname->id, 2) != 2) {
|
|
cli_dbgmsg("read macro_intnames failed\n");
|
|
macro_intnames->count = i;
|
|
goto abort;
|
|
}
|
|
macro_intname->id = vba_endian_convert_16(macro_intname->id, FALSE);
|
|
if (cli_readn(fd, ¯o_intname->length, 1) != 1) {
|
|
cli_dbgmsg("read macro_intnames failed\n");
|
|
macro_intnames->count = i;
|
|
goto abort;
|
|
}
|
|
macro_intname->intname = (unsigned char *)cli_malloc(macro_intname->length+1);
|
|
if (!macro_intname->intname) {
|
|
macro_intnames->count = i;
|
|
goto abort;
|
|
}
|
|
if (cli_readn(fd, macro_intname->intname, macro_intname->length) != macro_intname->length) {
|
|
cli_dbgmsg("read macro_intnames failed\n");
|
|
macro_intnames->count = (uint16_t)(i + 1);
|
|
goto abort;
|
|
}
|
|
macro_intname->intname[macro_intname->length] = '\0';
|
|
if (cli_readn(fd, &junk, 1) != 1) {
|
|
cli_dbgmsg("read macro_intnames failed\n");
|
|
macro_intnames->count = (uint16_t)(i + 1);
|
|
goto abort;
|
|
}
|
|
cli_dbgmsg("int name: %s\n", (char *)macro_intname->intname);
|
|
}
|
|
return macro_intnames;
|
|
abort:
|
|
wm_free_intnames(macro_intnames);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
wm_free_intnames(macro_intnames_t *macro_intnames)
|
|
{
|
|
if (macro_intnames) {
|
|
int i;
|
|
|
|
for(i = 0; i < macro_intnames->count; i++)
|
|
free(macro_intnames->macro_intname[i].intname);
|
|
free(macro_intnames->macro_intname);
|
|
free(macro_intnames);
|
|
}
|
|
}
|
|
|
|
vba_project_t *wm_dir_read(const char *dir)
|
|
{
|
|
int fd, done, i;
|
|
off_t end_offset;
|
|
unsigned char info_id;
|
|
macro_info_t *macro_info=NULL;
|
|
vba_project_t *vba_project;
|
|
mso_fib_t fib;
|
|
char fullname[NAME_MAX + 1];
|
|
|
|
snprintf(fullname, sizeof(fullname) - 1, "%s/WordDocument", dir);
|
|
fd = open(fullname, O_RDONLY|O_BINARY);
|
|
if (fd == -1) {
|
|
cli_dbgmsg("Open WordDocument failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (!wm_read_fib(fd, &fib)) {
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
if(fib.macro_len == 0) {
|
|
cli_dbgmsg("No macros detected\n");
|
|
/* Must be clean */
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
wm_print_fib(&fib);
|
|
|
|
/* Go one past the start to ignore start_id */
|
|
if (lseek(fd, fib.macro_offset + 1, SEEK_SET) != (off_t)(fib.macro_offset + 1)) {
|
|
cli_dbgmsg("lseek macro_offset failed\n");
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
|
|
end_offset = fib.macro_offset + fib.macro_len;
|
|
done = FALSE;
|
|
|
|
while ((lseek(fd, 0, SEEK_CUR) < end_offset) && !done) {
|
|
macro_intnames_t *macro_intnames;
|
|
|
|
if (cli_readn(fd, &info_id, 1) != 1) {
|
|
cli_dbgmsg("read macro_info failed\n");
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
switch (info_id) {
|
|
case 0x01:
|
|
macro_info = wm_read_macro_info(fd);
|
|
if (macro_info == NULL) {
|
|
done = TRUE;
|
|
}
|
|
break;
|
|
case 0x03:
|
|
if(!wm_read_oxo3(fd))
|
|
done = TRUE;
|
|
break;
|
|
case 0x05:
|
|
if(!wm_skip_menu_info(fd))
|
|
done = TRUE;
|
|
break;
|
|
case 0x10:
|
|
if(!wm_skip_macro_extnames(fd))
|
|
done = TRUE;
|
|
break;
|
|
case 0x11:
|
|
macro_intnames = wm_read_macro_intnames(fd);
|
|
if(macro_intnames)
|
|
wm_free_intnames(macro_intnames);
|
|
else
|
|
done = TRUE;
|
|
break;
|
|
case 0x12:
|
|
/* No sure about these, always seems to
|
|
come after the macros though, so finish
|
|
*/
|
|
done = TRUE;
|
|
break;
|
|
case 0x40:
|
|
/* end marker */
|
|
done = TRUE;
|
|
break;
|
|
default:
|
|
cli_dbgmsg("unknown type: 0x%x\n", info_id);
|
|
done = TRUE;
|
|
}
|
|
}
|
|
|
|
close(fd);
|
|
|
|
if (macro_info) {
|
|
vba_project = (vba_project_t *) cli_malloc(sizeof(struct vba_project_tag));
|
|
if (!vba_project) {
|
|
goto abort;
|
|
}
|
|
vba_project->name = (char **) cli_malloc(sizeof(char *) *macro_info->count);
|
|
if (!vba_project->name) {
|
|
free(vba_project);
|
|
vba_project = NULL;
|
|
goto abort;
|
|
}
|
|
vba_project->dir = cli_strdup(dir);
|
|
vba_project->offset = (uint32_t *) cli_malloc(sizeof(uint32_t) *
|
|
macro_info->count);
|
|
if (!vba_project->offset) {
|
|
free(vba_project->name);
|
|
if(vba_project->dir)
|
|
free(vba_project->dir);
|
|
free(vba_project);
|
|
vba_project = NULL;
|
|
goto abort;
|
|
}
|
|
vba_project->length = (uint32_t *) cli_malloc(sizeof(uint32_t) *
|
|
macro_info->count);
|
|
if (!vba_project->length) {
|
|
free(vba_project->offset);
|
|
free(vba_project->name);
|
|
free(vba_project->dir);
|
|
free(vba_project);
|
|
vba_project = NULL;
|
|
goto abort;
|
|
}
|
|
vba_project->key = (unsigned char *) cli_malloc(sizeof(unsigned char) *
|
|
macro_info->count);
|
|
if (!vba_project->key) {
|
|
free(vba_project->length);
|
|
free(vba_project->offset);
|
|
free(vba_project->name);
|
|
free(vba_project->dir);
|
|
free(vba_project);
|
|
vba_project = NULL;
|
|
} else {
|
|
vba_project->count = macro_info->count;
|
|
for(i = 0; i < macro_info->count; i++) {
|
|
vba_project->name[i] = cli_strdup("WordDocument");
|
|
vba_project->offset[i] = macro_info->macro_entry[i].offset;
|
|
vba_project->length[i] = macro_info->macro_entry[i].len;
|
|
vba_project->key[i] = macro_info->macro_entry[i].key;
|
|
}
|
|
}
|
|
} else
|
|
vba_project = NULL;
|
|
|
|
/* Fall through */
|
|
abort:
|
|
if (macro_info)
|
|
wm_free_macro_info(macro_info);
|
|
return vba_project;
|
|
}
|
|
|
|
unsigned char *wm_decrypt_macro(int fd, uint32_t offset, uint32_t len,
|
|
unsigned char key)
|
|
{
|
|
unsigned char *buff;
|
|
uint32_t i;
|
|
|
|
if (lseek(fd, offset, SEEK_SET) != (int64_t)offset) {
|
|
return NULL;
|
|
}
|
|
buff = (unsigned char *) cli_malloc(len);
|
|
if (!buff) {
|
|
return NULL;
|
|
}
|
|
|
|
if (cli_readn(fd, buff, len) != (int)len) {
|
|
free(buff);
|
|
return NULL;
|
|
}
|
|
if (key != 0)
|
|
for (i=0 ; i < len; i++)
|
|
buff[i] ^= key;
|
|
return buff;
|
|
}
|
|
|