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1342 lines
35 KiB
1342 lines
35 KiB
/*
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* Copyright (C) 2002 - 2004 Tomasz Kojm <tkojm@clamav.net>
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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., 675 Mass Ave, Cambridge, MA 02139, 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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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <netinet/in.h>
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#if HAVE_MMAP
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#else /* HAVE_SYS_MMAN_H */
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#undef HAVE_MMAP
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#endif
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#endif
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#include <mspack.h>
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#ifdef CL_THREAD_SAFE
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# include <pthread.h>
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pthread_mutex_t cli_scanrar_mutex = PTHREAD_MUTEX_INITIALIZER;
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#endif
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int cli_scanrar_inuse = 0;
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extern short cli_leavetemps_flag;
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extern int cli_mbox(const char *dir, int desc, unsigned int options); /* FIXME */
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#include "clamav.h"
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#include "others.h"
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#include "scanners.h"
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#include "matcher-ac.h"
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#include "matcher-bm.h"
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#include "matcher.h"
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#include "unrarlib.h"
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#include "ole2_extract.h"
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#include "vba_extract.h"
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#include "msexpand.h"
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#include "chmunpack.h"
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#include "pe.h"
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#include "filetypes.h"
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#include "htmlnorm.h"
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#include "untar.h"
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#include "special.h"
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#ifdef HAVE_ZLIB_H
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#include <zlib.h>
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#include <zzip.h>
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#endif
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#ifdef HAVE_BZLIB_H
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#include <bzlib.h>
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#endif
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#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
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#include <limits.h>
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#include <stddef.h>
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#endif
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/* Maximum filenames under various systems - njh */
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#ifndef NAME_MAX /* e.g. Linux */
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# ifdef MAXNAMELEN /* e.g. Solaris */
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# define NAME_MAX MAXNAMELEN
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# else
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# ifdef FILENAME_MAX /* e.g. SCO */
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# define NAME_MAX FILENAME_MAX
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# endif
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# endif
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#endif
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#define SCAN_ARCHIVE (options & CL_SCAN_ARCHIVE)
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#define SCAN_MAIL (options & CL_SCAN_MAIL)
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#define SCAN_OLE2 (options & CL_SCAN_OLE2)
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#define SCAN_HTML (options & CL_SCAN_HTML)
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#define SCAN_PE (options & CL_SCAN_PE)
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#define DISABLE_RAR (options & CL_SCAN_DISABLERAR)
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#define DETECT_ENCRYPTED (options & CL_SCAN_BLOCKENCRYPTED)
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#define BLOCKMAX (options & CL_SCAN_BLOCKMAX)
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#define MAX_MAIL_RECURSION 15
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static int cli_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec);
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#ifdef CL_THREAD_SAFE
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static void cli_unlock_mutex(void *mtx)
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{
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cli_dbgmsg("Pthread cancelled. Unlocking mutex.\n");
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pthread_mutex_unlock(mtx);
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}
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#endif
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static int cli_scanrar(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
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{
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FILE *tmp = NULL;
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int files = 0, fd, ret = CL_CLEAN, afiles;
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ArchiveList_struct *rarlist = NULL;
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ArchiveList_struct *rarlist_head = NULL;
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char *rar_data_ptr;
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unsigned long rar_data_size;
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cli_dbgmsg("in scanrar()\n");
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#ifdef CL_THREAD_SAFE
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pthread_cleanup_push(cli_unlock_mutex, &cli_scanrar_mutex);
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pthread_mutex_lock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 1;
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#endif
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if(! (afiles = urarlib_list(desc, (ArchiveList_struct *) &rarlist))) {
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#ifdef CL_THREAD_SAFE
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pthread_mutex_unlock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 0;
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#endif
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return CL_ERAR;
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}
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cli_dbgmsg("RAR: Number of archived files: %d\n", afiles);
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rarlist_head = rarlist;
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while(rarlist) {
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if(DETECT_ENCRYPTED && (rarlist->item.Flags & 4)) {
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files++;
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cli_dbgmsg("RAR: Encrypted files found in archive.\n");
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lseek(desc, 0, SEEK_SET);
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ret = cli_scandesc(desc, virname, scanned, root, 0, 0);
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if(ret < 0) {
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break;
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} else if(ret != CL_VIRUS) {
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*virname = "Encrypted.RAR";
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ret = CL_VIRUS;
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}
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break;
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}
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if(limits) {
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if(limits->maxratio && rarlist->item.UnpSize && rarlist->item.PackSize) {
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if((unsigned int) rarlist->item.UnpSize / (unsigned int) rarlist->item.PackSize >= limits->maxratio) {
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cli_dbgmsg("RAR: Max ratio reached (normal: %d, compressed: %d, max: %ld)\n", (int) rarlist->item.UnpSize, (int) rarlist->item.PackSize, limits->maxratio);
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*virname = "Oversized.RAR";
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ret = CL_VIRUS;
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break;
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}
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}
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if(limits->maxfilesize && (rarlist->item.UnpSize > (unsigned int) limits->maxfilesize)) {
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cli_dbgmsg("RAR: %s: Size exceeded (%u, max: %lu)\n", rarlist->item.Name, (unsigned int) rarlist->item.UnpSize, limits->maxfilesize);
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rarlist = rarlist->next;
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files++;
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if(BLOCKMAX) {
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*virname = "RAR.ExceededFileSize";
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ret = CL_VIRUS;
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break;
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}
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continue;
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}
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if(limits->maxfiles && (files > limits->maxfiles)) {
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cli_dbgmsg("RAR: Files limit reached (max: %d)\n", limits->maxfiles);
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if(BLOCKMAX) {
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*virname = "RAR.ExceededFilesLimit";
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ret = CL_VIRUS;
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break;
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}
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break;
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}
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}
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if(rarlist->item.FileAttr & RAR_FENTRY_ATTR_DIRECTORY) {
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rarlist = rarlist->next;
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files++;
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continue;
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}
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if((tmp = tmpfile()) == NULL) {
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cli_dbgmsg("RAR: Can't generate temporary file.\n");
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#ifdef CL_THREAD_SAFE
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pthread_mutex_unlock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 0;
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#endif
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return CL_ETMPFILE;
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}
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fd = fileno(tmp);
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if( urarlib_get(&rar_data_ptr, &rar_data_size, rarlist->item.Name, desc, "clam")) {
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cli_dbgmsg("RAR: Extracted: %s, size: %lu\n", rarlist->item.Name, rar_data_size);
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if(fwrite(rar_data_ptr, 1, rar_data_size, tmp) != rar_data_size) {
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cli_dbgmsg("RAR: Can't write to file.\n");
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fclose(tmp);
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tmp = NULL;
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ret = CL_ERAR;
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if(rar_data_ptr) {
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free(rar_data_ptr);
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rar_data_ptr = NULL;
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}
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break;
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}
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if(rar_data_ptr) {
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free(rar_data_ptr);
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rar_data_ptr = NULL;
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}
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if(fflush(tmp) != 0) {
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cli_dbgmsg("RAR: fflush() failed: %s\n", strerror(errno));
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fclose(tmp);
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urarlib_freelist(rarlist_head);
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#ifdef CL_THREAD_SAFE
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pthread_mutex_unlock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 0;
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#endif
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return CL_EFSYNC;
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}
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lseek(fd, 0, SEEK_SET);
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if((ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec)) == CL_VIRUS ) {
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cli_dbgmsg("RAR: Infected with %s\n", *virname);
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fclose(tmp);
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urarlib_freelist(rarlist);
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#ifdef CL_THREAD_SAFE
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pthread_mutex_unlock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 0;
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#endif
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return ret;
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}
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} else {
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cli_dbgmsg("RAR: Can't decompress file %s\n", rarlist->item.Name);
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fclose(tmp);
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tmp = NULL;
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ret = CL_ERAR; /* WinRAR 3.0 ? */
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break;
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}
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fclose(tmp);
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tmp = NULL;
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rarlist = rarlist->next;
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files++;
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}
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urarlib_freelist(rarlist_head);
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#ifdef CL_THREAD_SAFE
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pthread_mutex_unlock(&cli_scanrar_mutex);
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cli_scanrar_inuse = 0;
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pthread_cleanup_pop(0);
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#endif
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cli_dbgmsg("RAR: Exit code: %d\n", ret);
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return ret;
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}
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#ifdef HAVE_ZLIB_H
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static int cli_scanzip(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
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{
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ZZIP_DIR *zdir;
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ZZIP_DIRENT zdirent;
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ZZIP_FILE *zfp;
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FILE *tmp = NULL;
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char *buff;
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int fd, bytes, files = 0, ret = CL_CLEAN;
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struct stat source;
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zzip_error_t err;
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cli_dbgmsg("in scanzip()\n");
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if((zdir = zzip_dir_fdopen(dup(desc), &err)) == NULL) {
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cli_dbgmsg("Zip: Not supported file format ?.\n");
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cli_dbgmsg("Zip: zzip_dir_fdopen() return code: %d\n", err);
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/* no return with CL_EZIP due to password protected zips */
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return CL_CLEAN;
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}
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fstat(desc, &source);
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if(!(buff = (char *) cli_malloc(FILEBUFF))) {
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cli_dbgmsg("Zip: unable to malloc(%d)\n", FILEBUFF);
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zzip_dir_close(zdir);
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return CL_EMEM;
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}
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while(zzip_dir_read(zdir, &zdirent)) {
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if(!zdirent.d_name || !strlen(zdirent.d_name)) { /* Mimail fix */
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cli_dbgmsg("Zip: strlen(zdirent.d_name) == %d\n", strlen(zdirent.d_name));
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*virname = "Suspected.Zip";
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ret = CL_VIRUS;
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break;
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}
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cli_dbgmsg("Zip: %s, compressed: %u, normal: %u, ratio: %d (max: %d)\n", zdirent.d_name, zdirent.d_csize, zdirent.st_size, zdirent.st_size / (zdirent.d_csize+1), limits ? limits->maxratio : -1 );
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if(!zdirent.st_size) {
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files++;
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if(zdirent.d_crc32) {
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cli_dbgmsg("Zip: Broken file or modified information in local header part of archive\n");
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*virname = "Suspected.Zip";
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ret = CL_VIRUS;
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break;
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}
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continue;
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}
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/* work-around for problematic zips (zziplib crashes with them) */
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if(zdirent.d_csize <= 0 || zdirent.st_size < 0) {
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files++;
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cli_dbgmsg("Zip: Malformed archive detected.\n");
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*virname = "Suspected.Zip";
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ret = CL_VIRUS;
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break;
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}
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if(limits && limits->maxratio > 0 && ((unsigned) zdirent.st_size / (unsigned) zdirent.d_csize) >= limits->maxratio) {
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*virname = "Oversized.Zip";
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ret = CL_VIRUS;
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break;
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}
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if(DETECT_ENCRYPTED && (zdirent.d_flags & 1 )) {
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files++;
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cli_dbgmsg("Zip: Encrypted files found in archive.\n");
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lseek(desc, 0, SEEK_SET);
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ret = cli_scandesc(desc, virname, scanned, root, 0, 0);
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if(ret < 0) {
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break;
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} else if(ret != CL_VIRUS) {
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*virname = "Encrypted.Zip";
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ret = CL_VIRUS;
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}
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break;
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}
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if(limits) {
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if(limits->maxfilesize && (zdirent.st_size > limits->maxfilesize)) {
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cli_dbgmsg("Zip: %s: Size exceeded (%d, max: %ld)\n", zdirent.d_name, zdirent.st_size, limits->maxfilesize);
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files++;
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/* ret = CL_EMAXSIZE; */
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if(BLOCKMAX) {
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*virname = "Zip.ExceededFileSize";
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ret = CL_VIRUS;
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break;
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}
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continue; /* continue scanning */
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}
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if(limits->maxfiles && (files > limits->maxfiles)) {
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cli_dbgmsg("Zip: Files limit reached (max: %d)\n", limits->maxfiles);
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if(BLOCKMAX) {
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*virname = "Zip.ExceededFilesLimit";
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ret = CL_VIRUS;
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break;
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}
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break;
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}
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}
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/* generate temporary file and get its descriptor */
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if((tmp = tmpfile()) == NULL) {
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cli_dbgmsg("Zip: Can't generate tmpfile().\n");
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ret = CL_ETMPFILE;
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break;
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}
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if((zfp = zzip_file_open(zdir, zdirent.d_name, 0)) == NULL) {
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cli_dbgmsg("Zip: Can't open file %s\n", zdirent.d_name);
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ret = CL_EZIP;
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break;
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}
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while((bytes = zzip_file_read(zfp, buff, FILEBUFF)) > 0) {
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if(fwrite(buff, 1, bytes, tmp) != (size_t) bytes) {
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cli_dbgmsg("Zip: Can't write to file.\n");
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zzip_file_close(zfp);
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zzip_dir_close(zdir);
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fclose(tmp);
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free(buff);
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return CL_EZIP;
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}
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}
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zzip_file_close(zfp);
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if(fflush(tmp) != 0) {
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cli_dbgmsg("Zip: fflush() failed: %s\n", strerror(errno));
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ret = CL_EFSYNC;
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break;
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}
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fd = fileno(tmp);
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lseek(fd, 0, SEEK_SET);
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if((ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec)) == CL_VIRUS ) {
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cli_dbgmsg("Zip: Infected with %s\n", *virname);
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ret = CL_VIRUS;
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break;
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} else if(ret == CL_EMALFZIP) {
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/*
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* The trick with detection of ZoD only works with higher (>= 5)
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* recursion limit level.
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*/
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cli_dbgmsg("Zip: Malformed Zip file, scanning stopped.\n");
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*virname = "Suspected.Zip";
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ret = CL_VIRUS;
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break;
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}
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if (tmp) {
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fclose(tmp);
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tmp = NULL;
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}
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files++;
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}
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zzip_dir_close(zdir);
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if (tmp) {
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fclose(tmp);
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tmp = NULL;
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}
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free(buff);
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return ret;
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}
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static int cli_scangzip(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
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{
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int fd, bytes, ret = CL_CLEAN;
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|
long int size = 0;
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char *buff;
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FILE *tmp = NULL;
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gzFile gd;
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cli_dbgmsg("in cli_scangzip()\n");
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if((gd = gzdopen(dup(desc), "rb")) == NULL) {
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cli_dbgmsg("GZip: Can't open descriptor %d\n", desc);
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return CL_EGZIP;
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}
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if((tmp = tmpfile()) == NULL) {
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cli_dbgmsg("GZip: Can't generate temporary file.\n");
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|
gzclose(gd);
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return CL_ETMPFILE;
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}
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fd = fileno(tmp);
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|
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if(!(buff = (char *) cli_malloc(FILEBUFF))) {
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cli_dbgmsg("GZip: Unable to malloc %d bytes.\n", FILEBUFF);
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gzclose(gd);
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return CL_EMEM;
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}
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|
|
while((bytes = gzread(gd, buff, FILEBUFF)) > 0) {
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size += bytes;
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|
|
if(limits)
|
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if(limits->maxfilesize && (size + FILEBUFF > limits->maxfilesize)) {
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cli_dbgmsg("GZip: Size exceeded (stopped at %ld, max: %ld)\n", size, limits->maxfilesize);
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/* ret = CL_EMAXSIZE; */
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break;
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}
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|
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if(cli_writen(fd, buff, bytes) != bytes) {
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cli_dbgmsg("GZip: Can't write to file.\n");
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fclose(tmp);
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|
gzclose(gd);
|
|
free(buff);
|
|
return CL_EGZIP;
|
|
}
|
|
}
|
|
|
|
free(buff);
|
|
gzclose(gd);
|
|
if(fsync(fd) == -1) {
|
|
cli_dbgmsg("GZip: Can't synchronise descriptor %d\n", fd);
|
|
fclose(tmp);
|
|
return CL_EFSYNC;
|
|
}
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
if((ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec)) == CL_VIRUS ) {
|
|
cli_dbgmsg("GZip: Infected with %s\n", *virname);
|
|
fclose(tmp);
|
|
return CL_VIRUS;
|
|
}
|
|
fclose(tmp);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_BZLIB_H
|
|
|
|
#ifdef NOBZ2PREFIX
|
|
#define BZ2_bzReadOpen bzReadOpen
|
|
#define BZ2_bzReadClose bzReadClose
|
|
#define BZ2_bzRead bzRead
|
|
#endif
|
|
|
|
static int cli_scanbzip(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
int fd, bytes, ret = CL_CLEAN, bzerror = 0;
|
|
short memlim = 0;
|
|
long int size = 0;
|
|
char *buff;
|
|
FILE *fs, *tmp = NULL;
|
|
BZFILE *bfd;
|
|
|
|
|
|
if((fs = fdopen(dup(desc), "rb")) == NULL) {
|
|
cli_dbgmsg("Bzip: Can't open descriptor %d.\n", desc);
|
|
return CL_EBZIP;
|
|
}
|
|
|
|
if(limits)
|
|
if(limits->archivememlim)
|
|
memlim = 1;
|
|
|
|
if((bfd = BZ2_bzReadOpen(&bzerror, fs, 0, memlim, NULL, 0)) == NULL) {
|
|
cli_dbgmsg("Bzip: Can't initialize bzip2 library (descriptor: %d).\n", desc);
|
|
fclose(fs);
|
|
return CL_EBZIP;
|
|
}
|
|
|
|
if((tmp = tmpfile()) == NULL) {
|
|
cli_dbgmsg("Bzip: Can't generate temporary file.\n");
|
|
BZ2_bzReadClose(&bzerror, bfd);
|
|
fclose(fs);
|
|
return CL_ETMPFILE;
|
|
}
|
|
fd = fileno(tmp);
|
|
|
|
if(!(buff = (char *) malloc(FILEBUFF))) {
|
|
cli_dbgmsg("Bzip: Unable to malloc %d bytes.\n", FILEBUFF);
|
|
fclose(tmp);
|
|
fclose(fs);
|
|
BZ2_bzReadClose(&bzerror, bfd);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
while((bytes = BZ2_bzRead(&bzerror, bfd, buff, FILEBUFF)) > 0) {
|
|
size += bytes;
|
|
|
|
if(limits)
|
|
if(limits->maxfilesize && (size + FILEBUFF > limits->maxfilesize)) {
|
|
cli_dbgmsg("Bzip: Size exceeded (stopped at %ld, max: %ld)\n", size, limits->maxfilesize);
|
|
/* ret = CL_EMAXSIZE; */
|
|
break;
|
|
}
|
|
|
|
if(cli_writen(fd, buff, bytes) != bytes) {
|
|
cli_dbgmsg("Bzip: Can't write to file.\n");
|
|
BZ2_bzReadClose(&bzerror, bfd);
|
|
fclose(tmp);
|
|
free(buff);
|
|
fclose(fs);
|
|
return CL_EGZIP;
|
|
}
|
|
}
|
|
|
|
free(buff);
|
|
BZ2_bzReadClose(&bzerror, bfd);
|
|
if(fsync(fd) == -1) {
|
|
cli_dbgmsg("Bzip: Synchronisation failed for descriptor %d\n", fd);
|
|
fclose(tmp);
|
|
fclose(fs);
|
|
return CL_EFSYNC;
|
|
}
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
if((ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec)) == CL_VIRUS ) {
|
|
cli_dbgmsg("Bzip: Infected with %s\n", *virname);
|
|
}
|
|
fclose(tmp);
|
|
fclose(fs);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int cli_scanszdd(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
int fd, ret = CL_CLEAN;
|
|
FILE *tmp = NULL, *in;
|
|
|
|
|
|
cli_dbgmsg("in cli_scanmscomp()\n");
|
|
|
|
if((in = fdopen(dup(desc), "rb")) == NULL) {
|
|
cli_dbgmsg("SZDD: Can't open descriptor %d\n", desc);
|
|
return CL_EMSCOMP;
|
|
}
|
|
|
|
if((tmp = tmpfile()) == NULL) {
|
|
cli_dbgmsg("SZDD: Can't generate temporary file.\n");
|
|
fclose(in);
|
|
return CL_ETMPFILE;
|
|
}
|
|
|
|
if(cli_msexpand(in, tmp) == -1) {
|
|
cli_dbgmsg("SZDD: msexpand failed.\n");
|
|
return CL_EMSCOMP;
|
|
}
|
|
|
|
fclose(in);
|
|
if(fflush(tmp)) {
|
|
cli_dbgmsg("SZDD: fflush() failed.\n");
|
|
fclose(tmp);
|
|
return CL_EFSYNC;
|
|
}
|
|
|
|
fd = fileno(tmp);
|
|
lseek(fd, 0, SEEK_SET);
|
|
if((ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec)) == CL_VIRUS) {
|
|
cli_dbgmsg("SZDD: Infected with %s\n", *virname);
|
|
fclose(tmp);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
fclose(tmp);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanmscab(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
struct mscab_decompressor *cabd = NULL;
|
|
struct mscabd_cabinet *base, *cab;
|
|
struct mscabd_file *file;
|
|
char *tempname;
|
|
int ret = CL_CLEAN;
|
|
|
|
|
|
cli_dbgmsg("in cli_scanmscab()\n");
|
|
|
|
if((cabd = mspack_create_cab_decompressor(NULL)) == NULL) {
|
|
cli_dbgmsg("MSCAB: Can't create libmspack CAB decompressor\n");
|
|
return CL_EMSCAB;
|
|
}
|
|
|
|
if((base = cabd->dsearch(cabd, dup(desc))) == NULL) {
|
|
cli_dbgmsg("MSCAB: I/O error or no valid cabinets found\n");
|
|
mspack_destroy_cab_decompressor(cabd);
|
|
return CL_EMSCAB;
|
|
}
|
|
|
|
for(cab = base; cab; cab = cab->next) {
|
|
for(file = cab->files; file; file = file->next) {
|
|
|
|
if(limits && limits->maxfilesize && (file->length > (unsigned int) limits->maxfilesize)) {
|
|
cli_dbgmsg("MSCAB: %s: Size exceeded (%u, max: %lu)\n", file->filename, file->length, limits->maxfilesize);
|
|
if(BLOCKMAX) {
|
|
*virname = "MSCAB.ExceededFileSize";
|
|
cabd->close(cabd, base);
|
|
mspack_destroy_cab_decompressor(cabd);
|
|
return CL_VIRUS;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
tempname = cli_gentemp(NULL);
|
|
cli_dbgmsg("MSCAB: Extracting data to %s\n", tempname);
|
|
if(cabd->extract(cabd, file, tempname)) {
|
|
cli_dbgmsg("MSCAB: libmscab error code: %d\n", cabd->last_error(cabd));
|
|
} else {
|
|
ret = cli_scanfile(tempname, virname, scanned, root, limits, options, arec, mrec);
|
|
}
|
|
if(!cli_leavetemps_flag)
|
|
unlink(tempname);
|
|
free(tempname);
|
|
if(ret == CL_VIRUS)
|
|
break;
|
|
}
|
|
if(ret == CL_VIRUS)
|
|
break;
|
|
}
|
|
|
|
cabd->close(cabd, base);
|
|
mspack_destroy_cab_decompressor(cabd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanhtml(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *tempname, fullname[1024];
|
|
int ret=CL_CLEAN, fd;
|
|
|
|
|
|
cli_dbgmsg("in cli_scanhtml()\n");
|
|
|
|
tempname = cli_gentemp(NULL);
|
|
if(mkdir(tempname, 0700)) {
|
|
cli_dbgmsg("ScanHTML -> Can't create temporary directory %s\n", tempname);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
html_normalise_fd(desc, tempname, NULL);
|
|
snprintf(fullname, 1024, "%s/comment.html", tempname);
|
|
fd = open(fullname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
ret = cli_scandesc(fd, virname, scanned, root, 0, CL_TYPE_HTML);
|
|
close(fd);
|
|
}
|
|
|
|
if(ret < 0 || ret == CL_VIRUS) {
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(tempname);
|
|
free(tempname);
|
|
return ret;
|
|
}
|
|
|
|
if (ret == CL_CLEAN) {
|
|
snprintf(fullname, 1024, "%s/nocomment.html", tempname);
|
|
fd = open(fullname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
ret = cli_scandesc(fd, virname, scanned, root, 0, CL_TYPE_HTML);
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
if(ret < 0 || ret == CL_VIRUS) {
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(tempname);
|
|
free(tempname);
|
|
return ret;
|
|
}
|
|
|
|
if (ret == CL_CLEAN) {
|
|
snprintf(fullname, 1024, "%s/script.html", tempname);
|
|
fd = open(fullname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
ret = cli_scandesc(fd, virname, scanned, root, 0, CL_TYPE_HTML);
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(tempname);
|
|
|
|
free(tempname);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scandir(const char *dirname, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
DIR *dd;
|
|
struct dirent *dent;
|
|
#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
|
|
union {
|
|
struct dirent d;
|
|
char b[offsetof(struct dirent, d_name) + NAME_MAX + 1];
|
|
} result;
|
|
#endif
|
|
struct stat statbuf;
|
|
char *fname;
|
|
|
|
|
|
if((dd = opendir(dirname)) != NULL) {
|
|
#ifdef HAVE_READDIR_R_3
|
|
while(!readdir_r(dd, &result.d, &dent) && dent) {
|
|
#elif defined(HAVE_READDIR_R_2)
|
|
while((dent = (struct dirent *) readdir_r(dd, &result.d))) {
|
|
#else
|
|
while((dent = readdir(dd))) {
|
|
#endif
|
|
#ifndef C_INTERIX
|
|
if(dent->d_ino)
|
|
#endif
|
|
{
|
|
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
|
|
/* build the full name */
|
|
fname = cli_calloc(strlen(dirname) + strlen(dent->d_name) + 2, sizeof(char));
|
|
sprintf(fname, "%s/%s", dirname, dent->d_name);
|
|
|
|
/* stat the file */
|
|
if(lstat(fname, &statbuf) != -1) {
|
|
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode)) {
|
|
if (cli_scandir(fname, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS) {
|
|
free(fname);
|
|
closedir(dd);
|
|
return CL_VIRUS;
|
|
}
|
|
} else
|
|
if(S_ISREG(statbuf.st_mode))
|
|
if(cli_scanfile(fname, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS) {
|
|
free(fname);
|
|
closedir(dd);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
}
|
|
free(fname);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
cli_dbgmsg("ScanDir: Can't open directory %s.\n", dirname);
|
|
return CL_EOPEN;
|
|
}
|
|
|
|
closedir(dd);
|
|
return 0;
|
|
}
|
|
|
|
static int cli_vba_scandir(const char *dirname, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
int ret = CL_CLEAN, i, fd, data_len;
|
|
vba_project_t *vba_project;
|
|
DIR *dd;
|
|
struct dirent *dent;
|
|
#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
|
|
union {
|
|
struct dirent d;
|
|
char b[offsetof(struct dirent, d_name) + NAME_MAX + 1];
|
|
} result;
|
|
#endif
|
|
struct stat statbuf;
|
|
char *fname, *fullname;
|
|
unsigned char *data;
|
|
|
|
|
|
cli_dbgmsg("VBADir: %s\n", dirname);
|
|
if((vba_project = (vba_project_t *) vba56_dir_read(dirname))) {
|
|
|
|
for(i = 0; i < vba_project->count; i++) {
|
|
fullname = (char *) cli_malloc(strlen(vba_project->dir) + strlen(vba_project->name[i]) + 2);
|
|
sprintf(fullname, "%s/%s", vba_project->dir, vba_project->name[i]);
|
|
fd = open(fullname, O_RDONLY);
|
|
if(fd == -1) {
|
|
cli_dbgmsg("VBADir: Can't open file %s\n", fullname);
|
|
free(fullname);
|
|
ret = CL_EOPEN;
|
|
break;
|
|
}
|
|
free(fullname);
|
|
cli_dbgmsg("VBADir: Decompress VBA project '%s'\n", vba_project->name[i]);
|
|
data = (unsigned char *) vba_decompress(fd, vba_project->offset[i], &data_len);
|
|
close(fd);
|
|
|
|
if(!data) {
|
|
cli_dbgmsg("VBADir: WARNING: VBA project '%s' decompressed to NULL\n", vba_project->name[i]);
|
|
} else {
|
|
if(scanned)
|
|
*scanned += data_len / CL_COUNT_PRECISION;
|
|
|
|
if(cli_scanbuff(data, data_len, virname, root, CL_TYPE_MSOLE2) == CL_VIRUS) {
|
|
free(data);
|
|
ret = CL_VIRUS;
|
|
break;
|
|
}
|
|
|
|
free(data);
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < vba_project->count; i++)
|
|
free(vba_project->name[i]);
|
|
free(vba_project->name);
|
|
free(vba_project->dir);
|
|
free(vba_project->offset);
|
|
free(vba_project);
|
|
} else if ((fullname = ppt_vba_read(dirname))) {
|
|
if(cli_scandir(fullname, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS) {
|
|
ret = CL_VIRUS;
|
|
}
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(fullname);
|
|
free(fullname);
|
|
} else if ((vba_project = (vba_project_t *) wm_dir_read(dirname))) {
|
|
for (i = 0; i < vba_project->count; i++) {
|
|
fullname = (char *) cli_malloc(strlen(vba_project->dir) + strlen(vba_project->name[i]) + 2);
|
|
sprintf(fullname, "%s/%s", vba_project->dir, vba_project->name[i]);
|
|
fd = open(fullname, O_RDONLY);
|
|
if(fd == -1) {
|
|
cli_dbgmsg("VBADir: Can't open file %s\n", fullname);
|
|
free(fullname);
|
|
ret = CL_EOPEN;
|
|
break;
|
|
}
|
|
free(fullname);
|
|
cli_dbgmsg("VBADir: Decompress WM project '%s' macro:%d key:%d\n", vba_project->name[i], i, vba_project->key[i]);
|
|
data = (unsigned char *) wm_decrypt_macro(fd, vba_project->offset[i], vba_project->length[i], vba_project->key[i]);
|
|
close(fd);
|
|
|
|
if(!data) {
|
|
cli_dbgmsg("VBADir: WARNING: WM project '%s' macro %d decrypted to NULL\n", vba_project->name[i], i);
|
|
} else {
|
|
if(scanned)
|
|
*scanned += vba_project->length[i] / CL_COUNT_PRECISION;
|
|
if(cli_scanbuff(data, vba_project->length[i], virname, root, CL_TYPE_MSOLE2) == CL_VIRUS) {
|
|
free(data);
|
|
ret = CL_VIRUS;
|
|
break;
|
|
}
|
|
free(data);
|
|
}
|
|
}
|
|
for(i = 0; i < vba_project->count; i++)
|
|
free(vba_project->name[i]);
|
|
free(vba_project->key);
|
|
free(vba_project->length);
|
|
free(vba_project->offset);
|
|
free(vba_project->name);
|
|
free(vba_project->dir);
|
|
free(vba_project);
|
|
}
|
|
|
|
if(ret != CL_CLEAN)
|
|
return ret;
|
|
|
|
if((dd = opendir(dirname)) != NULL) {
|
|
#ifdef HAVE_READDIR_R_3
|
|
while(!readdir_r(dd, &result.d, &dent) && dent) {
|
|
#elif defined(HAVE_READDIR_R_2)
|
|
while((dent = (struct dirent *) readdir_r(dd, &result.d))) {
|
|
#else
|
|
while((dent = readdir(dd))) {
|
|
#endif
|
|
#ifndef C_INTERIX
|
|
if(dent->d_ino)
|
|
#endif
|
|
{
|
|
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
|
|
/* build the full name */
|
|
fname = cli_calloc(strlen(dirname) + strlen(dent->d_name) + 2, sizeof(char));
|
|
sprintf(fname, "%s/%s", dirname, dent->d_name);
|
|
|
|
/* stat the file */
|
|
if(lstat(fname, &statbuf) != -1) {
|
|
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode))
|
|
if (cli_vba_scandir(fname, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS) {
|
|
ret = CL_VIRUS;
|
|
free(fname);
|
|
break;
|
|
}
|
|
}
|
|
free(fname);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
cli_dbgmsg("VBADir: Can't open directory %s.\n", dirname);
|
|
return CL_EOPEN;
|
|
}
|
|
|
|
closedir(dd);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanole2(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *dir;
|
|
int ret = CL_CLEAN;
|
|
|
|
|
|
cli_dbgmsg("in cli_scanole2()\n");
|
|
|
|
/* generate the temporary directory */
|
|
dir = cli_gentemp(NULL);
|
|
if(mkdir(dir, 0700)) {
|
|
cli_dbgmsg("OLE2: Can't create temporary directory %s\n", dir);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
if((ret = cli_ole2_extract(desc, dir, limits))) {
|
|
cli_dbgmsg("OLE2: %s\n", cl_strerror(ret));
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(dir);
|
|
free(dir);
|
|
return ret;
|
|
}
|
|
|
|
if((ret = cli_vba_scandir(dir, virname, scanned, root, limits, options, arec, mrec)) != CL_VIRUS) {
|
|
if(cli_scandir(dir, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS) {
|
|
ret = CL_VIRUS;
|
|
}
|
|
}
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(dir);
|
|
free(dir);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scantar(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *dir;
|
|
int ret = CL_CLEAN;
|
|
|
|
|
|
cli_dbgmsg("in cli_scantar()\n");
|
|
|
|
/* generate temporary directory */
|
|
dir = cli_gentemp(NULL);
|
|
if(mkdir(dir, 0700)) {
|
|
cli_errmsg("Tar: Can't create temporary directory %s\n", dir);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
if((ret = cli_untar(dir, desc)))
|
|
cli_dbgmsg("Tar: %s\n", cl_strerror(ret));
|
|
else
|
|
ret = cli_scandir(dir, virname, scanned, root, limits, options, arec, mrec);
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(dir);
|
|
|
|
free(dir);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanmschm(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *tempname;
|
|
int ret = CL_CLEAN;
|
|
|
|
|
|
cli_dbgmsg("in cli_scanmschm()\n");
|
|
|
|
tempname = cli_gentemp(NULL);
|
|
if(mkdir(tempname, 0700)) {
|
|
cli_dbgmsg("CHM: Can't create temporary directory %s\n", tempname);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
if(chm_unpack(desc, tempname))
|
|
ret = cli_scandir(tempname, virname, scanned, root, limits, options, arec, mrec);
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(tempname);
|
|
|
|
free(tempname);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanscrenc(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *tempname;
|
|
int ret = CL_CLEAN;
|
|
|
|
cli_dbgmsg("in cli_scanscrenc()\n");
|
|
|
|
tempname = cli_gentemp(NULL);
|
|
if(mkdir(tempname, 0700)) {
|
|
cli_dbgmsg("CHM: Can't create temporary directory %s\n", tempname);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
if (html_screnc_decode(desc, tempname))
|
|
ret = cli_scandir(tempname, virname, scanned, root, limits, options, arec, mrec);
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(tempname);
|
|
|
|
free(tempname);
|
|
return ret;
|
|
}
|
|
|
|
static int cli_scanmail(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char *dir;
|
|
int ret;
|
|
|
|
|
|
cli_dbgmsg("Starting cli_scanmail(), mrec == %d, arec == %d\n", *mrec, *arec);
|
|
|
|
/* generate the temporary directory */
|
|
dir = cli_gentemp(NULL);
|
|
if(mkdir(dir, 0700)) {
|
|
cli_dbgmsg("Mail: Can't create temporary directory %s\n", dir);
|
|
free(dir);
|
|
return CL_ETMPDIR;
|
|
}
|
|
|
|
/*
|
|
* Extract the attachments into the temporary directory
|
|
*/
|
|
if((ret = cli_mbox(dir, desc, options))) {
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(dir);
|
|
free(dir);
|
|
return ret;
|
|
}
|
|
|
|
ret = cli_scandir(dir, virname, scanned, root, limits, options, arec, mrec);
|
|
|
|
if(!cli_leavetemps_flag)
|
|
cli_rmdirs(dir);
|
|
|
|
free(dir);
|
|
return ret;
|
|
}
|
|
|
|
int cli_magic_scandesc(int desc, const char **virname, long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
char magic[MAGIC_BUFFER_SIZE + 1];
|
|
int ret = CL_CLEAN, nret;
|
|
int bread = 0;
|
|
cli_file_t type;
|
|
|
|
|
|
if(!root) {
|
|
cli_errmsg("CRITICAL: root == NULL\n");
|
|
return CL_EMALFDB;
|
|
}
|
|
|
|
if(!options) { /* raw mode (stdin, etc.) */
|
|
cli_dbgmsg("Raw mode: No support for special files\n");
|
|
if((ret = cli_scandesc(desc, virname, scanned, root, 0, 0) == CL_VIRUS))
|
|
cli_dbgmsg("%s found in descriptor %d\n", *virname, desc);
|
|
return ret;
|
|
}
|
|
|
|
if(SCAN_ARCHIVE && limits && limits->maxreclevel)
|
|
if(*arec > limits->maxreclevel) {
|
|
cli_dbgmsg("Archive recursion limit exceeded (arec == %d).\n", *arec);
|
|
/* return CL_EMAXREC; */
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(SCAN_MAIL)
|
|
if(*mrec > MAX_MAIL_RECURSION) {
|
|
cli_dbgmsg("Mail recursion level exceeded (mrec == %d).\n", *mrec);
|
|
/* return CL_EMAXREC; */
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
lseek(desc, 0, SEEK_SET);
|
|
memset(magic, 0, sizeof(magic));
|
|
|
|
if((bread = read(desc, magic, MAGIC_BUFFER_SIZE)) == -1) {
|
|
cli_dbgmsg("Can't read from descriptor %d\n");
|
|
return CL_EIO;
|
|
} else if(bread < 2) {
|
|
/* short read - no need to do magic */
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
lseek(desc, 0, SEEK_SET);
|
|
type = cli_filetype(magic, bread);
|
|
|
|
type == CL_TYPE_MAIL ? (*mrec)++ : (*arec)++;
|
|
|
|
switch(type) {
|
|
case CL_TYPE_RAR:
|
|
if(!DISABLE_RAR && SCAN_ARCHIVE && !cli_scanrar_inuse)
|
|
ret = cli_scanrar(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_ZIP:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scanzip(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_GZ:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scangzip(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_BZ:
|
|
#ifdef HAVE_BZLIB_H
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scanbzip(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
#endif
|
|
break;
|
|
|
|
case CL_TYPE_MSSZDD:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scanszdd(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_MSCAB:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scanmscab(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_MAIL:
|
|
if(SCAN_MAIL)
|
|
ret = cli_scanmail(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_MSCHM:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scanmschm(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_MSOLE2:
|
|
if(SCAN_OLE2)
|
|
ret = cli_scanole2(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_TAR:
|
|
if(SCAN_ARCHIVE)
|
|
ret = cli_scantar(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_SCRENC:
|
|
ret = cli_scanscrenc(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
case CL_TYPE_DATA:
|
|
/* it could be a false positive and a standard DOS .COM file */
|
|
{
|
|
struct stat s;
|
|
if(fstat(desc, &s) == 0 && S_ISREG(s.st_mode) && s.st_size < 65536)
|
|
type = CL_TYPE_UNKNOWN_DATA;
|
|
}
|
|
|
|
case CL_TYPE_UNKNOWN_DATA:
|
|
ret = cli_check_mydoom_log(desc, virname);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
type == CL_TYPE_MAIL ? (*mrec)-- : (*arec)--;
|
|
|
|
if(type != CL_TYPE_DATA && ret != CL_VIRUS) { /* scan the raw file */
|
|
int typerec;
|
|
|
|
type == CL_TYPE_UNKNOWN_TEXT ? (typerec = 1) : (typerec = 0);
|
|
if(lseek(desc, 0, SEEK_SET) < 0)
|
|
cli_errmsg("lseek() failed, trying to continue anyway...\n");
|
|
|
|
if((nret = cli_scandesc(desc, virname, scanned, root, typerec, type)) == CL_VIRUS) {
|
|
cli_dbgmsg("%s found in descriptor %d.\n", *virname, desc);
|
|
return CL_VIRUS;
|
|
|
|
} else if(nret < 0) {
|
|
return nret;
|
|
|
|
} else if(nret >= CL_TYPENO) {
|
|
lseek(desc, 0, SEEK_SET);
|
|
|
|
switch(nret) {
|
|
case CL_TYPE_HTML:
|
|
if(SCAN_HTML)
|
|
if(cli_scanhtml(desc, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS)
|
|
return CL_VIRUS;
|
|
break;
|
|
|
|
case CL_TYPE_MAIL:
|
|
if(SCAN_MAIL)
|
|
if(cli_scanmail(desc, virname, scanned, root, limits, options, arec, mrec) == CL_VIRUS)
|
|
return CL_VIRUS;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
(*arec)++;
|
|
lseek(desc, 0, SEEK_SET);
|
|
switch(type) {
|
|
/* Due to performance reasons all executables were first scanned
|
|
* in raw mode. Now we will try to unpack them
|
|
*/
|
|
case CL_TYPE_MSEXE:
|
|
if(SCAN_PE)
|
|
ret = cli_scanpe(desc, virname, scanned, root, limits, options, arec, mrec);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
(*arec)--;
|
|
|
|
if(ret == CL_EFORMAT) {
|
|
cli_warnmsg("Descriptor[%d]: %s\n", desc, cl_strerror(CL_EFORMAT));
|
|
return CL_CLEAN;
|
|
} else {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
int cl_scandesc(int desc, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options)
|
|
{
|
|
int arec = 0, mrec = 0;
|
|
|
|
return cli_magic_scandesc(desc, virname, scanned, root, limits, options, &arec, &mrec);
|
|
}
|
|
|
|
static int cli_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options, int *arec, int *mrec)
|
|
{
|
|
int fd, ret;
|
|
|
|
|
|
/* internal version of cl_scanfile with arec/mrec preserved */
|
|
if((fd = open(filename, O_RDONLY)) == -1)
|
|
return CL_EOPEN;
|
|
|
|
ret = cli_magic_scandesc(fd, virname, scanned, root, limits, options, arec, mrec);
|
|
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
int cl_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options)
|
|
{
|
|
int fd, ret;
|
|
|
|
|
|
if((fd = open(filename, O_RDONLY)) == -1)
|
|
return CL_EOPEN;
|
|
|
|
ret = cl_scandesc(fd, virname, scanned, root, limits, options);
|
|
close(fd);
|
|
|
|
return ret;
|
|
}
|
|
|