/*

  *  Copyright (C) 2002 - 2005 Tomasz Kojm <tkojm@clamav.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software

  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  *  MA 02110-1301, USA.

  */
 

 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 

 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>

 #ifdef	HAVE_UNISTD_H

 #include <unistd.h>

 #endif
 #ifdef	HAVE_SYS_PARAM_H

 #include <sys/param.h>

 #endif

 #include <fcntl.h>

 #ifndef	C_WINDOWS

 #include <dirent.h>

 #include <netinet/in.h>

 #endif

 #if HAVE_MMAP
 #if HAVE_SYS_MMAN_H
 #include <sys/mman.h>
 #else /* HAVE_SYS_MMAN_H */
 #undef HAVE_MMAP
 #endif
 #endif
 

 #ifndef	O_BINARY
 #define	O_BINARY	0
 #endif
 

 extern short cli_leavetemps_flag;
 

 #define DCONF_ARCH  ctx->dconf->archive
 #define DCONF_DOC   ctx->dconf->doc
 #define DCONF_MAIL  ctx->dconf->mail
 #define DCONF_OTHER ctx->dconf->other
 

 #include "clamav.h"
 #include "others.h"

 #include "dconf.h"

 #include "scanners.h"

 #include "matcher-ac.h"
 #include "matcher-bm.h"

 #include "matcher.h"

 #include "unrar.h"

 #include "ole2_extract.h"
 #include "vba_extract.h"

 #include "msexpand.h"

 #include "mbox.h"

 #include "chmunpack.h"

 #include "pe.h"

 #include "elf.h"

 #include "filetypes.h"
 #include "htmlnorm.h"

 #include "untar.h"

 #include "special.h"

 #include "binhex.h"

 /* #include "uuencode.h" */

 #include "tnef.h"

 #include "pst.h"

 #include "sis.h"

 #include "pdf.h"

 #include "str.h"

 #include "mspack.h"
 #include "cab.h"

 #include "rtf.h"
 

 #ifdef HAVE_ZLIB_H
 #include <zlib.h>

 #include "unzip.h"

 #endif
 
 #ifdef HAVE_BZLIB_H
 #include <bzlib.h>
 #endif
 

 #if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
 #include <limits.h>

 #include <stddef.h>

 #endif
 

 /* Maximum filenames under various systems - njh */
 #ifndef	NAME_MAX	/* e.g. Linux */
 # ifdef	MAXNAMELEN	/* e.g. Solaris */
 #   define	NAME_MAX	MAXNAMELEN
 # else
 #   ifdef	FILENAME_MAX	/* e.g. SCO */
 #     define	NAME_MAX	FILENAME_MAX

 #   else
 #     define	NAME_MAX	256

 #   endif
 # endif
 #endif

 #define MAX_MAIL_RECURSION  15

 static int cli_scanfile(const char *filename, cli_ctx *ctx);

 static int cli_unrar_scanmetadata(int desc, rar_metadata_t *metadata, cli_ctx *ctx, unsigned int files, uint32_t* sfx_check)

 {

 	int ret = CL_SUCCESS;
 	struct cli_meta_node* mdata;

     if(files == 1 && sfx_check) {
 	if(*sfx_check == metadata->crc)
 	    return CL_BREAK;/* break extract loop */
 	else
 	    *sfx_check = metadata->crc;

     }
 

     cli_dbgmsg("RAR: %s, crc32: 0x%x, encrypted: %d, compressed: %u, normal: %u, method: %d, ratio: %d (max: %d)\n",
 	metadata->filename, metadata->crc, metadata->encrypted, metadata->pack_size,
 	metadata->unpack_size, metadata->method,
 	metadata->pack_size ? ((unsigned int) metadata->unpack_size / (unsigned int) metadata->pack_size) : 0, ctx->limits ? ctx->limits->maxratio : 0);

     /* Scan metadata */
     mdata = ctx->engine->rar_mlist;
     if(mdata) do {
 	if(mdata->encrypted != metadata->encrypted)
 	    continue;

 	if(mdata->crc32 && (unsigned int) mdata->crc32 != metadata->crc)
 	    continue;

 	if(mdata->csize > 0 && (unsigned int) mdata->csize != metadata->pack_size)
 	    continue;

 	if(mdata->size >= 0 && (unsigned int) mdata->size != metadata->unpack_size)
 	    continue;

 	if(mdata->method >= 0 && mdata->method != metadata->method)
 	    continue;

 	if(mdata->fileno && mdata->fileno != files)
 	    continue;

 	if(mdata->maxdepth && ctx->arec > mdata->maxdepth)
 	    continue;

 	/* TODO add support for regex */
 	/*if(mdata->filename && !strstr(zdirent.d_name, mdata->filename))*/
 	if(mdata->filename && strcmp((char *) metadata->filename, mdata->filename))
 	    continue;

 	break; /* matched */

     } while((mdata = mdata->next));

     if(mdata) {
 	*ctx->virname = mdata->virname;
 	return CL_VIRUS;	   
     }

     if(DETECT_ENCRYPTED && metadata->encrypted) {
 	cli_dbgmsg("RAR: Encrypted files found in archive.\n");
 	lseek(desc, 0, SEEK_SET);
 	ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL);
 	if(ret != CL_VIRUS) {
 	    *ctx->virname = "Encrypted.RAR";
 	    return CL_VIRUS;

 	}

     }

 /*
     TROG - TODO: multi-volume files
     if((rarlist->item.Flags & 0x03) != 0) {
 	cli_dbgmsg("RAR: Skipping %s (split)\n", rarlist->item.Name);
 	rarlist = rarlist->next;
 	continue;
     }
 */

     return ret;
 }
 
 static int cli_unrar_checklimits(const cli_ctx *ctx, const rar_metadata_t *metadata, unsigned int files)
 {

     if(ctx->limits) {
 	if(ctx->limits->maxratio && metadata->unpack_size && metadata->pack_size) {

 	    if(metadata->unpack_size / metadata->pack_size >= ctx->limits->maxratio) {
 		cli_dbgmsg("RAR: Max ratio reached (normal: %Lu, compressed: %Lu, max: %u)\n", metadata->unpack_size, metadata->pack_size, ctx->limits->maxratio);

 		if(BLOCKMAX) {
 		    *ctx->virname = "Oversized.RAR";
 		    return CL_VIRUS;
 		}
 		return CL_EMAXSIZE;

 	    }

 	}

 	if(ctx->limits->maxfilesize && (metadata->unpack_size > ctx->limits->maxfilesize)) {

 	    cli_dbgmsg("RAR: %s: Size exceeded (%Lu, max: %lu)\n", metadata->filename, metadata->unpack_size, ctx->limits->maxfilesize);

 	    if(BLOCKMAX) {
 		*ctx->virname = "RAR.ExceededFileSize";
 		return CL_VIRUS;

 	    }

 	    return CL_EMAXSIZE;

 	}

 	if(ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) {

 	    cli_dbgmsg("RAR: Files limit reached (max: %u)\n", ctx->limits->maxfiles);

 	    if(BLOCKMAX) {
 		*ctx->virname = "RAR.ExceededFilesLimit";
 		return CL_VIRUS;

 	    }

 	    return CL_EMAXFILES;

 	}
     }
 

     return CL_SUCCESS;

 }
 
 static int cli_scanrar(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check)
 {
 	int ret = CL_CLEAN;
 	rar_metadata_t *metadata, *metadata_tmp;
 	char *dir;
 	rar_state_t rar_state;

 
     cli_dbgmsg("in scanrar()\n");
 
     /* generate the temporary directory */
     dir = cli_gentemp(NULL);
     if(mkdir(dir, 0700)) {
 	cli_dbgmsg("RAR: Can't create temporary directory %s\n", dir);
 	free(dir);
 	return CL_ETMPDIR;
     }
 
     if(sfx_offset)
 	lseek(desc, sfx_offset, SEEK_SET);
 
     if((ret = cli_unrar_open(desc, dir, &rar_state)) != CL_SUCCESS) {
 	if(!cli_leavetemps_flag)
 	    cli_rmdirs(dir);
 	free(dir);
 	cli_dbgmsg("RAR: Error: %s\n", cl_strerror(ret));
 	return ret;
     }
 
     do {
 	int rc;
 	rar_state.unpack_data->ofd = -1;

 	ret = cli_unrar_extract_next_prepare(&rar_state,dir);
 	if(ret != CL_SUCCESS) 
 	    break;
 	ret = cli_unrar_checklimits(ctx, rar_state.metadata_tail, rar_state.file_count);
 	if(ret && ret != CL_VIRUS) {
 	    ret = CL_CLEAN;
 	    continue;
 	} else if(ret == CL_VIRUS) {
 	    break;
 	}

 	ret = cli_unrar_extract_next(&rar_state,dir);
 	if(rar_state.unpack_data->ofd > 0) {
 	    lseek(rar_state.unpack_data->ofd,0,SEEK_SET);
 	    rc = cli_magic_scandesc(rar_state.unpack_data->ofd,ctx);
 	    close(rar_state.unpack_data->ofd);
 	    if(!cli_leavetemps_flag) 
 		unlink(rar_state.filename);
 	    if(rc == CL_VIRUS ) {
 		cli_dbgmsg("RAR: infected with %s\n",*ctx->virname);
 		ret = CL_VIRUS;

 		break;
 	    }
 	}
 

 	if(ret == CL_SUCCESS)
 	    ret = cli_unrar_scanmetadata(desc,rar_state.metadata, ctx, rar_state.file_count, sfx_check);
 
     } while(ret == CL_SUCCESS);
 
     if(ret == CL_BREAK)
 	ret = CL_CLEAN;
 
     metadata = metadata_tmp = rar_state.metadata; 
 
     if(cli_scandir(rar_state.comment_dir, ctx) == CL_VIRUS)
 	ret = CL_VIRUS;

     cli_unrar_close(&rar_state);
 

     if(!cli_leavetemps_flag)
         cli_rmdirs(dir);

     free(dir);

     metadata = metadata_tmp;
     while (metadata) {
     	metadata_tmp = metadata->next;
     	free(metadata->filename);
     	free(metadata);
     	metadata = metadata_tmp;

     }

     cli_dbgmsg("RAR: Exit code: %d\n", ret);

     return ret;
 }
 
 #ifdef HAVE_ZLIB_H

 static int cli_scanzip(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check)

 {

 	zip_dir *zdir;
 	zip_dirent zdirent;
 	zip_file *zfp;

 	FILE *tmp = NULL;

 	char *tmpname = NULL, *buff;

 	int fd, bytes, ret = CL_CLEAN;

 	unsigned long int size = 0;

 	unsigned int files = 0, encrypted, bfcnt;

 	struct stat source;

 	struct cli_meta_node *mdata;

 	int err;

 	uint8_t swarning = 0, fail, success;

 
     cli_dbgmsg("in scanzip()\n");

     if((zdir = zip_dir_open(desc, sfx_offset, &err)) == NULL) {
 	cli_dbgmsg("Zip: zip_dir_open() return code: %d\n", err);

 	/* no return with CL_EZIP due to password protected zips */
 	return CL_CLEAN;

     }
 

     fstat(desc, &source);
 

     if(!(buff = (char *) cli_malloc(FILEBUFF))) {

 	cli_dbgmsg("Zip: unable to malloc(%d)\n", FILEBUFF);

 	zip_dir_close(zdir);

 	return CL_EMEM;
     }
 

     while(zip_dir_read(zdir, &zdirent)) {

 	files++;

 	if(files == 1 && sfx_check) {
 	    if(*sfx_check == zdirent.d_crc32)
 		break;
 	    else
 		*sfx_check = zdirent.d_crc32;
 	}
 

 	if(!zdirent.d_name) {

 	    cli_dbgmsg("Zip: zdirent.d_name == NULL\n");

 	    *ctx->virname = "Suspect.Zip";

 	    ret = CL_VIRUS;
 	    break;
 	}
 

         /* Bit 0: file is encrypted
 	 * Bit 6: Strong encryption was used
 	 * Bit 13: Encrypted central directory
 	 */

 	encrypted = ((zdirent.d_flags & 0x2041) != 0);

 	cli_dbgmsg("Zip: %s, crc32: 0x%x, offset: %d, encrypted: %d, compressed: %u, normal: %u, method: %d, ratio: %d (max: %d)\n", zdirent.d_name, zdirent.d_crc32, zdirent.d_off, encrypted, zdirent.d_csize, zdirent.st_size, zdirent.d_compr, zdirent.d_csize ? (zdirent.st_size / zdirent.d_csize) : 0, ctx->limits ? ctx->limits->maxratio : 0);

 	if(!zdirent.st_size) {

 	    if(zdirent.d_crc32) {
 		cli_dbgmsg("Zip: Broken file or modified information in local header part of archive\n");

 		*ctx->virname = "Exploit.Zip.ModifiedHeaders";

 		ret = CL_VIRUS;
 		break;
 	    }

 	    continue;
 	}
 

 	/* Scan metadata */

 	mdata = ctx->engine->zip_mlist;

 	if(mdata) do {

 	    if(mdata->encrypted != encrypted)
 		continue;
 

 	    if(mdata->crc32 && mdata->crc32 != zdirent.d_crc32)

 		continue;
 

 	    if(mdata->csize > 0 && (uint32_t) mdata->csize != zdirent.d_csize)

 		continue;
 

 	    if(mdata->size >= 0 && (uint32_t) mdata->size != zdirent.st_size)

 		continue;
 

 	    if(mdata->method >= 0 && (uint16_t) mdata->method != zdirent.d_compr)

 		continue;
 

 	    if(mdata->fileno && mdata->fileno != files)
 		continue;
 

 	    if(mdata->maxdepth && ctx->arec > mdata->maxdepth)

 		continue;
 
 	    /* TODO add support for regex */

 	    /*if(mdata->filename && !strstr(zdirent.d_name, mdata->filename))*/
 	    if(mdata->filename && strcmp(zdirent.d_name, mdata->filename))
 		continue;
 
 	    break; /* matched */
 
 	} while((mdata = mdata->next));
 
 	if(mdata) {

 	    *ctx->virname = mdata->virname;

 	    ret = CL_VIRUS;
 	    break;
 	}
 

 	/* 
 	 * Workaround for archives created with ICEOWS.
 	 * ZZIP_DIRENT does not contain information on file type
 	 * so we try to determine a directory via a filename
 	 */
 	if(zdirent.d_name[strlen(zdirent.d_name) - 1] == '/') {
 	    cli_dbgmsg("Zip: Directory entry with st_size != 0\n");
 	    continue;
 	}
 

 	if(!zdirent.d_csize) {
 	    cli_dbgmsg("Zip: Malformed file (d_csize == 0 but st_size != 0)\n");

 	    *ctx->virname = "Suspect.Zip";

 	    ret = CL_VIRUS;

 	    break;
 	}
 

 	if(ctx->limits && ctx->limits->maxratio > 0 && ((unsigned) zdirent.st_size / (unsigned) zdirent.d_csize) >= ctx->limits->maxratio) {
 	    *ctx->virname = "Oversized.Zip";

 	    ret = CL_VIRUS;
 	    break;
         }
 

 	if(DETECT_ENCRYPTED && encrypted) {

 	    cli_dbgmsg("Zip: Encrypted files found in archive.\n");

 	    lseek(desc, 0, SEEK_SET);

 	    ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL);

 	    if(ret < 0) {
 		break;
 	    } else if(ret != CL_VIRUS) {

 		*ctx->virname = "Encrypted.Zip";

 		ret = CL_VIRUS;
 	    }

 	    break;
 	}
 

 	if(ctx->limits) {
 	    if(ctx->limits->maxfilesize && ((unsigned int) zdirent.st_size > ctx->limits->maxfilesize)) {
 		cli_dbgmsg("Zip: %s: Size exceeded (%d, max: %ld)\n", zdirent.d_name, zdirent.st_size, ctx->limits->maxfilesize);

 		/* ret = CL_EMAXSIZE; */

 		if(BLOCKMAX) {

 		    *ctx->virname = "Zip.ExceededFileSize";

 		    ret = CL_VIRUS;
 		    break;
 		}
 		continue; /* continue scanning */

 	    }
 

 	    if(ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) {
 		cli_dbgmsg("Zip: Files limit reached (max: %d)\n", ctx->limits->maxfiles);

 		if(BLOCKMAX) {

 		    *ctx->virname = "Zip.ExceededFilesLimit";

 		    ret = CL_VIRUS;
 		    break;
 		}

 		break;
 	    }
 	}
 

 	if((zfp = zip_file_open(zdir, zdirent.d_name, zdirent.d_off)) == NULL) {
 	    if(zdir->errcode == CL_ESUPPORT) {
 		ret = CL_ESUPPORT;
 		if(!swarning) {
 		    cli_warnmsg("Not supported compression method in one or more files\n");
 		    swarning = 1;
 		}

 		continue;

 	    } else {
 		cli_dbgmsg("Zip: Can't open file %s\n", zdirent.d_name);
 		ret = CL_EZIP;
 		break;
 	    }

 	}
 

 	bfcnt = 0;
 	success = 0;
 	while(1) {
 	    fail = 0;
 
 	    /* generate temporary file and get its descriptor */
 	    if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) {
 		cli_dbgmsg("Zip: Can't generate tmpfile().\n");
 		ret = CL_ETMPFILE;
 		break;
 	    }
 
 	    size = 0;
 	    while((bytes = zip_file_read(zfp, buff, FILEBUFF)) > 0) {
 		size += bytes;
 		if(fwrite(buff, 1, bytes, tmp) != (size_t) bytes) {
 		    cli_dbgmsg("Zip: Can't write to file.\n");
 		    ret = CL_EIO;
 		    break;
 		}
 	    }
 
 	    if(!encrypted) {
 		if(size != zdirent.st_size) {
 		    cli_dbgmsg("Zip: Incorrectly decompressed (%d != %d)\n", size, zdirent.st_size);
 		    if(zfp->bf[0] == -1) {
 			ret = CL_EZIP;
 			break;
 		    } else {
 			fail = 1;
 		    }
 		} else {
 		    cli_dbgmsg("Zip: File decompressed to %s\n", tmpname);
 		    success = 1;
 		}
 	    }
 
 	    if(!fail) {
 		if(fflush(tmp) != 0) {
 		    cli_dbgmsg("Zip: fflush() failed\n");
 		    ret = CL_EFSYNC;
 		    break;
 		}
 
 		fd = fileno(tmp);
 
 		lseek(fd, 0, SEEK_SET);
 
 		if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
 		    cli_dbgmsg("Zip: Infected with %s\n", *ctx->virname);
 		    ret = CL_VIRUS;
 		    break;
 		}
 
 	    }

 	    if(tmp) {

 		fclose(tmp);

 		if(!cli_leavetemps_flag)
 		    unlink(tmpname);
 		free(tmpname);

 		tmp = NULL;

 	    }
 

 	    if(zfp->bf[bfcnt] == -1)

 		break;
 

 	    zfp->method = (uint16_t) zfp->bf[bfcnt];
 	    cli_dbgmsg("Zip: Brute force mode - checking compression method %u\n", zfp->method);
 	    bfcnt++;

 	}

 	zip_file_close(zfp);

 
 	if(!ret && !encrypted && !success) { /* brute-force decompression failed */

 	    cli_dbgmsg("Zip: All attempts to decompress file failed\n");
 	    ret = CL_EZIP;

 	}
 

 	if(ret) 

 	    break;
     }
 

     zip_dir_close(zdir);
     if(tmp) {

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);

 	tmp = NULL;
     }

 
     free(buff);

     return ret;
 }
 

 static int cli_scangzip(int desc, cli_ctx *ctx)

 {
 	int fd, bytes, ret = CL_CLEAN;

 	unsigned long int size = 0;

 	char *buff;

 	FILE *tmp = NULL;

 	char *tmpname;

 	gzFile gd;
 
 

     cli_dbgmsg("in cli_scangzip()\n");
 

     if((gd = gzdopen(dup(desc), "rb")) == NULL) {

 	cli_dbgmsg("GZip: Can't open descriptor %d\n", desc);

 	return CL_EGZIP;
     }
 

     if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) {

 	cli_dbgmsg("GZip: Can't generate temporary file.\n");

 	gzclose(gd);
 	return CL_ETMPFILE;
     }
     fd = fileno(tmp);
 

     if(!(buff = (char *) cli_malloc(FILEBUFF))) {

 	cli_dbgmsg("GZip: Unable to malloc %d bytes.\n", FILEBUFF);

 	gzclose(gd);

 	fclose(tmp);
 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_EMEM;

     }

     while((bytes = gzread(gd, buff, FILEBUFF)) > 0) {

 	size += bytes;
 

 	if(ctx->limits)
 	    if(ctx->limits->maxfilesize && (size + FILEBUFF > ctx->limits->maxfilesize)) {
 		cli_dbgmsg("GZip: Size exceeded (stopped at %ld, max: %ld)\n", size, ctx->limits->maxfilesize);

 		if(BLOCKMAX) {

 		    *ctx->virname = "GZip.ExceededFileSize";

 		    ret = CL_VIRUS;
 		}

 		break;
 	    }
 

 	if(cli_writen(fd, buff, bytes) != bytes) {

 	    cli_dbgmsg("GZip: Can't write to file.\n");

 	    fclose(tmp);

 	    if(!cli_leavetemps_flag)
 		unlink(tmpname);
 	    free(tmpname);	

 	    gzclose(gd);

 	    free(buff);

 	    return CL_EGZIP;
 	}
     }
 

     free(buff);

     gzclose(gd);

 
     if(ret == CL_VIRUS) {
 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return ret;
     }
 

     if(fsync(fd) == -1) {

 	cli_dbgmsg("GZip: Can't synchronise descriptor %d\n", fd);

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_EFSYNC;
     }
 
     lseek(fd, 0, SEEK_SET);

     if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
 	cli_dbgmsg("GZip: Infected with %s\n", *ctx->virname);

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_VIRUS;
     }

     fclose(tmp);

     if(!cli_leavetemps_flag)
 	unlink(tmpname);
     free(tmpname);	

 
     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, cli_ctx *ctx)

 {
 	int fd, bytes, ret = CL_CLEAN, bzerror = 0;
 	short memlim = 0;

 	unsigned long int size = 0;

 	char *buff;

 	FILE *fs, *tmp = NULL;

 	char *tmpname;

 	BZFILE *bfd;
 
 

     if((fs = fdopen(dup(desc), "rb")) == NULL) {

 	cli_dbgmsg("Bzip: Can't open descriptor %d.\n", desc);

 	return CL_EBZIP;
     }
 

     if(ctx->limits)
 	if(ctx->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((tmpname = cli_gentempstream(NULL, &tmp)) == 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);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	fclose(fs);
 	BZ2_bzReadClose(&bzerror, bfd);

 	return CL_EMEM;

     }

     while((bytes = BZ2_bzRead(&bzerror, bfd, buff, FILEBUFF)) > 0) {

 	size += bytes;
 

 	if(ctx->limits)
 	    if(ctx->limits->maxfilesize && (size + FILEBUFF > ctx->limits->maxfilesize)) {
 		cli_dbgmsg("Bzip: Size exceeded (stopped at %ld, max: %ld)\n", size, ctx->limits->maxfilesize);

 		if(BLOCKMAX) {

 		    *ctx->virname = "BZip.ExceededFileSize";

 		    ret = CL_VIRUS;
 		}

 		break;
 	    }
 

 	if(cli_writen(fd, buff, bytes) != bytes) {

 	    cli_dbgmsg("Bzip: Can't write to file.\n");

 	    BZ2_bzReadClose(&bzerror, bfd);

 	    fclose(tmp);

 	    if(!cli_leavetemps_flag)
 		unlink(tmpname);
 	    free(tmpname);	

 	    free(buff);

 	    fclose(fs);

 	    return CL_EGZIP;
 	}
     }
 

     free(buff);

     BZ2_bzReadClose(&bzerror, bfd);

 
     if(ret == CL_VIRUS) {
 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	fclose(fs);
 	return ret;
     }
 

     if(fsync(fd) == -1) {

 	cli_dbgmsg("Bzip: Synchronisation failed for descriptor %d\n", fd);

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	fclose(fs);

 	return CL_EFSYNC;
     }
 
     lseek(fd, 0, SEEK_SET);

     if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
 	cli_dbgmsg("Bzip: Infected with %s\n", *ctx->virname);

     }

     fclose(tmp);

     if(!cli_leavetemps_flag)
 	unlink(tmpname);
     free(tmpname);	

     fclose(fs);

 
     return ret;
 }
 #endif
 

 static int cli_scanszdd(int desc, cli_ctx *ctx)

 {

 	int fd, ret = CL_CLEAN, dcpy;

 	FILE *tmp = NULL, *in;

 	char *tmpname;

     cli_dbgmsg("in cli_scanszdd()\n");
 
     if((dcpy = dup(desc)) == -1) {
 	cli_dbgmsg("SZDD: Can't duplicate descriptor %d\n", desc);
 	return CL_EIO;
     }

     if((in = fdopen(dcpy, "rb")) == NULL) {

 	cli_dbgmsg("SZDD: Can't open descriptor %d\n", desc);

 	close(dcpy);

 	return CL_EMSCOMP;
     }
 

     if((tmpname = cli_gentempstream(NULL, &tmp)) == 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");

 	fclose(in);
 	fclose(tmp);
 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_EMSCOMP;
     }
 
     fclose(in);
     if(fflush(tmp)) {

 	cli_dbgmsg("SZDD: fflush() failed.\n");

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_EFSYNC;
     }
 
     fd = fileno(tmp);
     lseek(fd, 0, SEEK_SET);

     if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS) {
 	cli_dbgmsg("SZDD: Infected with %s\n", *ctx->virname);

 	fclose(tmp);

 	if(!cli_leavetemps_flag)
 	    unlink(tmpname);
 	free(tmpname);	

 	return CL_VIRUS;
     }
 
     fclose(tmp);

     if(!cli_leavetemps_flag)
 	unlink(tmpname);
     free(tmpname);	

     return ret;
 }
 

 static int cli_scanmscab(int desc, cli_ctx *ctx, off_t sfx_offset)

 {
 	char *tempname;

 	int ret;
 	unsigned int files = 0;
 	struct cab_archive cab;
 	struct cab_file *file;

 
 
     cli_dbgmsg("in cli_scanmscab()\n");
 

     if((ret = cab_open(desc, sfx_offset, &cab)))
 	return ret;

     for(file = cab.files; file; file = file->next) {
 	files++;

 	if(ctx->limits && ctx->limits->maxfilesize && (file->length > ctx->limits->maxfilesize)) {
 	    cli_dbgmsg("CAB: %s: Size exceeded (%u, max: %u)\n", file->name, file->length, ctx->limits->maxfilesize);
 	    if(BLOCKMAX) {
 		*ctx->virname = "CAB.ExceededFileSize";
 		cab_free(&cab);
 		return CL_VIRUS;

 	    }

 	    continue;
 	}

 	if(ctx->limits && ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) {
 	    cli_dbgmsg("CAB: Files limit reached (max: %u)\n", ctx->limits->maxfiles);
             cab_free(&cab);
 	    if(BLOCKMAX) {
 		*ctx->virname = "CAB.ExceededFilesLimit";
 		return CL_VIRUS;

 	    }

 	    return CL_CLEAN;

 	}

 
 	tempname = cli_gentemp(NULL);

 	cli_dbgmsg("CAB: Extracting file %s to %s, size %u\n", file->name, tempname, file->length);
 	if((ret = cab_extract(file, tempname)))

 	    cli_dbgmsg("CAB: Failed to extract file: %s\n", cl_strerror(ret));
 	else
 	    ret = cli_scanfile(tempname, ctx);
 
 	if(!cli_leavetemps_flag)
 	    unlink(tempname);
 	free(tempname);

 	if(ret == CL_VIRUS)
 	    break;
     }
 

     cab_free(&cab);

     return ret;
 }
 

 int cli_scandir(const char *dirname, cli_ctx *ctx)

 {

 	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

 #if	(!defined(C_CYGWIN)) && (!defined(C_INTERIX)) && (!defined(C_WINDOWS))

 	    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, ctx) == CL_VIRUS) {

 				free(fname);
 				closedir(dd);
 				return CL_VIRUS;
 			    }
 			} else
 			    if(S_ISREG(statbuf.st_mode))

 				if(cli_scanfile(fname, ctx) == 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, cli_ctx *ctx)

 {

 	int ret = CL_CLEAN, i, fd, ofd, 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|O_BINARY);

 	    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(ctx->scanned)
 		    *ctx->scanned += data_len / CL_COUNT_PRECISION;

 		if(cli_scanbuff(data, data_len, ctx->virname, ctx->engine, 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, ctx) == 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|O_BINARY);

 		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 length:%d\n", vba_project->name[i], i, vba_project->key[i], vba_project->length[i]);
 		if(vba_project->length[i])
 		    data = (unsigned char *) wm_decrypt_macro(fd, vba_project->offset[i], vba_project->length[i], vba_project->key[i]);
 		else
 		    data = NULL;

 		close(fd);
 		
 		if(!data) {

 			cli_dbgmsg("VBADir: WARNING: WM project '%s' macro %d decrypted to NULL\n", vba_project->name[i], i);

 		} else {

 			if(ctx->scanned)
 			    *ctx->scanned += vba_project->length[i] / CL_COUNT_PRECISION;

 			if(cli_scanbuff(data, vba_project->length[i], ctx->virname, ctx->engine, 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;

     /* Check directory for embedded OLE objects */
     fullname = (char *) cli_malloc(strlen(dirname) + 16);
     sprintf(fullname, "%s/_1_Ole10Native", dirname);

     fd = open(fullname, O_RDONLY|O_BINARY);

     free(fullname);
     if (fd >= 0) {
     	ofd = cli_decode_ole_object(fd, dirname);
 	if (ofd >= 0) {

 		ret = cli_scandesc(ofd, ctx, 0, 0, 0, NULL);

 		close(ofd);
 	}
 	close(fd);
 	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

 #if	(!defined(C_CYGWIN)) && (!defined(C_INTERIX)) && (!defined(C_WINDOWS))

 	    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, ctx) == 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_scanhtml(int desc, cli_ctx *ctx)

 {
 	char *tempname, fullname[1024];
 	int ret=CL_CLEAN, fd;

 	struct stat sb;

 
 
     cli_dbgmsg("in cli_scanhtml()\n");
 

     if(fstat(desc, &sb) == -1) {
         cli_errmsg("cli_scanhtml: fstat() failed for descriptor %d\n", desc);
 	return CL_EIO;
     }
 
     /* Because HTML detection is FP-prone and html_normalise_fd() needs to
      * mmap the file don't normalise files larger than 10 MB.
      */
     if(sb.st_size > 10485760) {
 	cli_dbgmsg("cli_scanhtml: exiting (file larger than 10 MB)\n");
 	return CL_CLEAN;
     }
 

     tempname = cli_gentemp(NULL);
     if(mkdir(tempname, 0700)) {

         cli_errmsg("cli_scanhtml: Can't create temporary directory %s\n", tempname);

 	free(tempname);

         return CL_ETMPDIR;
     }
 
     html_normalise_fd(desc, tempname, NULL);
     snprintf(fullname, 1024, "%s/comment.html", tempname);

     fd = open(fullname, O_RDONLY|O_BINARY);

     if (fd >= 0) {

         ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL);

 	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|O_BINARY);

 	if (fd >= 0) {

 	    ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL);

 	    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|O_BINARY);

 	if (fd >= 0) {

 	    ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL);

 	    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/rfc2397", tempname);

     	ret = cli_scandir(fullname, ctx);

     }
 
     if(!cli_leavetemps_flag)
         cli_rmdirs(tempname);
 
     free(tempname);
     return ret;
 }
 

 static int cli_scanhtml_utf16(int desc, cli_ctx *ctx)
 {
 	char *tempname, buff[512], *decoded;
 	int ret = CL_CLEAN, fd, bytes;
 
 
     cli_dbgmsg("in cli_scanhtml_utf16()\n");
 
     tempname = cli_gentemp(NULL);
     if((fd = open(tempname, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) {
 	cli_errmsg("cli_scanhtml_utf16: Can't create file %s\n", tempname);
 	free(tempname);
 	return CL_EIO;
     }
 
     while((bytes = read(desc, buff, sizeof(buff))) > 0) {
 	decoded = cli_utf16toascii(buff, bytes);
 	if(decoded) {
 	    if(write(fd, decoded, strlen(decoded)) == -1) {
 		cli_errmsg("cli_scanhtml_utf16: Can't write to file %s\n", tempname);
 		free(decoded);
 		unlink(tempname);
 		free(tempname);
 		close(fd);
 		return CL_EIO;
 	    }
 	    free(decoded);
 	}
     }
 
     fsync(fd);
     lseek(fd, 0, SEEK_SET);
     ret = cli_scanhtml(fd, ctx);
     close(fd);
 
     if(!cli_leavetemps_flag)
 	unlink(tempname);
     else
 	cli_dbgmsg("cli_scanhtml_utf16: Decoded HTML data saved in %s\n", tempname);
     free(tempname);
 
     return ret;
 }
 

 static int cli_scanole2(int desc, cli_ctx *ctx)

 {

 	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);

 	free(dir);

 	return CL_ETMPDIR;
     }
 

     if((ret = cli_ole2_extract(desc, dir, ctx->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, ctx)) != CL_VIRUS) {
 	if(cli_scandir(dir, ctx) == CL_VIRUS) {

 	    ret = CL_VIRUS;

 	}
     }
 

     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);

     free(dir);
     return ret;

 }
 

 static int cli_scantar(int desc, cli_ctx *ctx, unsigned int posix)

 {
 	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);

 	free(dir);

 	return CL_ETMPDIR;
     }
 

     if((ret = cli_untar(dir, desc, posix, ctx->limits)))

 	cli_dbgmsg("Tar: %s\n", cl_strerror(ret));
     else

 	ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 static int cli_scanbinhex(int desc, cli_ctx *ctx)

 {
 	char *dir;
 	int ret = CL_CLEAN;
 
 
     cli_dbgmsg("in cli_scanbinhex()\n");
 
     /* generate temporary directory */
     dir = cli_gentemp(NULL);
 
     if(mkdir(dir, 0700)) {
 	cli_errmsg("Binhex: Can't create temporary directory %s\n", dir);

 	free(dir);

 	return CL_ETMPDIR;
     }
 
     if((ret = cli_binhex(dir, desc)))
 	cli_dbgmsg("Binhex: %s\n", cl_strerror(ret));
     else

 	ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 static int cli_scanmschm(int desc, cli_ctx *ctx)

 {
 	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);

 	free(tempname);

 	return CL_ETMPDIR;
     }
 
     if(chm_unpack(desc, tempname))

 	ret = cli_scandir(tempname, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(tempname);
 
     free(tempname);
     return ret;
 }
 

 static int cli_scanscrenc(int desc, cli_ctx *ctx)

 {
 	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);

 	free(tempname);

 	return CL_ETMPDIR;
     }
 
     if (html_screnc_decode(desc, tempname))

 	ret = cli_scandir(tempname, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(tempname);
 
     free(tempname);
     return ret;
 }

 static int cli_scanriff(int desc, const char **virname)

 {
 	int ret = CL_CLEAN;
 
     if(cli_check_riff_exploit(desc) == 2) {
 	ret = CL_VIRUS;
 	*virname = "Exploit.W32.MS05-002";
     }
 
     return ret;
 }
 

 static int cli_scanjpeg(int desc, const char **virname)
 {
 	int ret = CL_CLEAN;
 
     if(cli_check_jpeg_exploit(desc) == 1) {
 	ret = CL_VIRUS;
 	*virname = "Exploit.W32.MS04-028";
     }
 
     return ret;
 }
 

 static int cli_scancryptff(int desc, cli_ctx *ctx)

 {

 	int ret = CL_CLEAN, ndesc;
 	unsigned int length, i;

 	unsigned char *src = NULL, *dest = NULL;
 	char *tempfile;
 	struct stat sb;
 
 
     if(fstat(desc, &sb) == -1) {

 	cli_errmsg("CryptFF: Can't fstat descriptor %d\n", desc);

 	return CL_EIO;
     }
 
     /* Skip the CryptFF file header */
     if(lseek(desc, 0x10, SEEK_SET) < 0) {

 	cli_errmsg("CryptFF: Can't lseek descriptor %d\n", desc);

 	return ret;
     }
 
     length = sb.st_size  - 0x10;
  

     if((dest = (unsigned char *) cli_malloc(length)) == NULL) {

 	cli_dbgmsg("CryptFF: Can't allocate memory\n");
         return CL_EMEM;
     }
 

     if((src = (unsigned char *) cli_malloc(length)) == NULL) {

 	cli_dbgmsg("CryptFF: Can't allocate memory\n");
 	free(dest);
         return CL_EMEM;
     }
 
     if((unsigned int) read(desc, src, length) != length) {
 	cli_dbgmsg("CryptFF: Can't read from descriptor %d\n", desc);
 	free(dest);
 	free(src);
 	return CL_EIO;
     }
 
     for(i = 0; i < length; i++)
 	dest[i] = src[i] ^ (unsigned char) 0xff;
 
     free(src);
 
     tempfile = cli_gentemp(NULL);

     if((ndesc = open(tempfile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) {

 	cli_errmsg("CryptFF: Can't create file %s\n", tempfile);
 	free(dest);
 	free(tempfile);
 	return CL_EIO;
     }
 
     if(write(ndesc, dest, length) == -1) {
 	cli_dbgmsg("CryptFF: Can't write to descriptor %d\n", ndesc);
 	free(dest);
 	close(ndesc);
 	free(tempfile);
 	return CL_EIO;
     }
 
     free(dest);
 
     if(fsync(ndesc) == -1) {
 	cli_errmsg("CryptFF: Can't fsync descriptor %d\n", ndesc);
 	close(ndesc);
 	free(tempfile);
 	return CL_EIO;
     }
 
     lseek(ndesc, 0, SEEK_SET);
 
     cli_dbgmsg("CryptFF: Scanning decrypted data\n");
 

     if((ret = cli_magic_scandesc(ndesc, ctx)) == CL_VIRUS)
 	cli_dbgmsg("CryptFF: Infected with %s\n", *ctx->virname);

 
     close(ndesc);
 
     if(cli_leavetemps_flag)
 	cli_dbgmsg("CryptFF: Decompressed data saved in %s\n", tempfile);
     else
 	unlink(tempfile);
 
     free(tempfile);
     return ret;
 }
 

 static int cli_scanpdf(int desc, cli_ctx *ctx)

 {
 	int ret;
 	char *dir = cli_gentemp(NULL);
 
 
     if(mkdir(dir, 0700)) {
 	cli_dbgmsg("Can't create temporary directory for PDF file %s\n", dir);
 	free(dir);
 	return CL_ETMPDIR;
     }
 

     ret = cli_pdf(dir, desc, ctx);

 
     if(ret == CL_CLEAN)

 	ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 static int cli_scantnef(int desc, cli_ctx *ctx)

 {
 	int ret;
 	char *dir = cli_gentemp(NULL);
 
 
     if(mkdir(dir, 0700)) {
 	cli_dbgmsg("Can't create temporary directory for tnef file %s\n", dir);
 	free(dir);
 	return CL_ETMPDIR;
     }
 
     ret = cli_tnef(dir, desc);
 
     if(ret == CL_CLEAN)

 	ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 static int cli_scanuuencoded(int desc, cli_ctx *ctx)

 {
 	int ret;
 	char *dir = cli_gentemp(NULL);
 
     if(mkdir(dir, 0700)) {
 	cli_dbgmsg("Can't create temporary directory for uuencoded file %s\n", dir);
 	free(dir);
 	return CL_ETMPDIR;
     }
 
     ret = cli_uuencode(dir, desc);
 
     if(ret == CL_CLEAN)

 	ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 /* Outlook PST file */
 static int cli_scanpst(int desc, cli_ctx *ctx)
 {
 	int ret;
 	char *dir = cli_gentemp(NULL);
 
     if(mkdir(dir, 0700)) {
 	cli_dbgmsg("Can't create temporary directory for PST file %s\n", dir);
 	free(dir);
 	return CL_ETMPDIR;
     }
 
     ret = cli_pst(dir, desc);
 
     if(ret == CL_SUCCESS)
 	ret = cli_scandir(dir, ctx);
 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;
 }
 

 static int cli_scanmail(int desc, cli_ctx *ctx)

 {
 	char *dir;
 	int ret;
 
 

     cli_dbgmsg("Starting cli_scanmail(), mrec == %d, arec == %d\n", ctx->mrec, ctx->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, ctx))) {

 	if(!cli_leavetemps_flag)
 	    cli_rmdirs(dir);

 	free(dir);
 	return ret;

     }
 

     ret = cli_scandir(dir, ctx);

 
     if(!cli_leavetemps_flag)
 	cli_rmdirs(dir);
 
     free(dir);
     return ret;

 }
 

 static int cli_scanraw(int desc, cli_ctx *ctx, cli_file_t type)

 {

 	int ret = CL_CLEAN, nret = CL_CLEAN;

 	unsigned short ftrec;
 	struct cli_matched_type *ftoffset = NULL, *fpt;

 	uint32_t lastzip, lastrar;

 
 
     switch(type) {
 	case CL_TYPE_UNKNOWN_TEXT:
 	case CL_TYPE_MSEXE:
 	    ftrec = 1;
 	    break;
 	default:
 	    ftrec = 0;
     }
 
     if(lseek(desc, 0, SEEK_SET) < 0) {
 	cli_errmsg("cli_scanraw: lseek() failed\n");
 	return CL_EIO;
     }
 

     if((ret = cli_scandesc(desc, ctx, ftrec, type, 0, &ftoffset)) == CL_VIRUS) {

 	cli_dbgmsg("%s found in descriptor %d.\n", *ctx->virname, desc);

 	return CL_VIRUS;
 
     } else if(ret < 0) {
 	return ret;
 
     } else if(ret >= CL_TYPENO) {
 	lseek(desc, 0, SEEK_SET);
 

 	if((nret = cli_scandesc(desc, ctx, 0, ret, 1, NULL)) == CL_VIRUS) {
 	    cli_dbgmsg("%s found in descriptor %d when scanning file type %u\n", *ctx->virname, desc, ret);
 	    return CL_VIRUS;
 	}
 

 	ret == CL_TYPE_MAIL ? ctx->mrec++ : ctx->arec++;

 	switch(ret) {
 	    case CL_TYPE_HTML:

 		if(SCAN_HTML && type == CL_TYPE_UNKNOWN_TEXT && (DCONF_DOC & DOC_CONF_HTML))

 		    if((nret = cli_scanhtml(desc, ctx)) == CL_VIRUS)

 			return CL_VIRUS;
 		break;
 
 	    case CL_TYPE_MAIL:

 		if(SCAN_MAIL && type == CL_TYPE_UNKNOWN_TEXT && (DCONF_MAIL & MAIL_CONF_MBOX))

 		    if((nret = cli_scanmail(desc, ctx)) == CL_VIRUS)

 			return CL_VIRUS;
 		break;
 
 	    case CL_TYPE_RARSFX:
 	    case CL_TYPE_ZIPSFX:

 	    case CL_TYPE_CABSFX:

 		if(type == CL_TYPE_MSEXE) {
 		    if(SCAN_ARCHIVE) {

 			lastzip = lastrar = 0xdeadbeef;

 			fpt = ftoffset;
 			while(fpt) {

 			    if(fpt->type == CL_TYPE_RARSFX && (DCONF_ARCH & ARCH_CONF_RAR)) {

 				cli_dbgmsg("RAR-SFX signature found at %d\n", fpt->offset);

 				if((nret = cli_scanrar(desc, ctx, fpt->offset, &lastrar)) == CL_VIRUS)

 				    break;

 			    } else if(fpt->type == CL_TYPE_ZIPSFX && (DCONF_ARCH & ARCH_CONF_ZIP)) {

 				cli_dbgmsg("ZIP-SFX signature found at %d\n", fpt->offset);

 				if((nret = cli_scanzip(desc, ctx, fpt->offset, &lastzip)) == CL_VIRUS)

 				    break;

 			    } else if(fpt->type == CL_TYPE_CABSFX && (DCONF_ARCH & ARCH_CONF_CAB)) {

 				cli_dbgmsg("CAB-SFX signature found at %d\n", fpt->offset);
 				if((nret = cli_scanmscab(desc, ctx, fpt->offset)) == CL_VIRUS)
 				    break;

 			    }

 			    fpt = fpt->next;
 			}
 		    }
 
 		    while(ftoffset) {
 			fpt = ftoffset;
 			ftoffset = ftoffset->next;
 			free(fpt);
 		    }
 

 		    if(nret == CL_VIRUS)
 			return nret;

 		}
 		break;
 
 	    default:
 		break;
 	}

 	ret == CL_TYPE_MAIL ? ctx->mrec-- : ctx->arec--;

 	ret = nret;

     }
 
     return ret;
 }
 

 int cli_magic_scandesc(int desc, cli_ctx *ctx)

 {

 	int ret = CL_CLEAN;

 	cli_file_t type;

 	struct stat sb;
 
 
     if(fstat(desc, &sb) == -1) {

 	cli_errmsg("Can't fstat descriptor %d\n", desc);

 	return CL_EIO;
     }

     if(sb.st_size <= 5) {
 	cli_dbgmsg("Small data (%d bytes)\n", sb.st_size);
 	return CL_CLEAN;
     }

     if(!ctx->engine) {

 	cli_errmsg("CRITICAL: engine == NULL\n");

 	return CL_EMALFDB;

     }
 

     if(!ctx->options) { /* raw mode (stdin, etc.) */

 	cli_dbgmsg("Raw mode: No support for special files\n");

 	if((ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL)) == CL_VIRUS)

 	    cli_dbgmsg("%s found in descriptor %d\n", *ctx->virname, desc);

 	return ret;
     }
 

     if(SCAN_ARCHIVE && ctx->limits && ctx->limits->maxreclevel)
 	if(ctx->arec > ctx->limits->maxreclevel) {
 	    cli_dbgmsg("Archive recursion limit exceeded (arec == %d).\n", ctx->arec);

 	    if(BLOCKMAX) {

 		*ctx->virname = "Archive.ExceededRecursionLimit";

 		return CL_VIRUS;
 	    }

 	    return CL_CLEAN;

 	}

     if(SCAN_MAIL)

 	if(ctx->mrec > MAX_MAIL_RECURSION) {
 	    cli_dbgmsg("Mail recursion level exceeded (mrec == %d).\n", ctx->mrec);

 	    /* return CL_EMAXREC; */
 	    return CL_CLEAN;
 	}

     lseek(desc, 0, SEEK_SET);

     type = cli_filetype2(desc, ctx->engine);

     lseek(desc, 0, SEEK_SET);

     if(type != CL_TYPE_DATA && ctx->engine->sdb) {

 	if((ret = cli_scanraw(desc, ctx, type)) == CL_VIRUS)

 	    return CL_VIRUS;
 	lseek(desc, 0, SEEK_SET);
     }
 

     type == CL_TYPE_MAIL ? ctx->mrec++ : ctx->arec++;

     switch(type) {

 	case CL_TYPE_RAR:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_RAR))

 		ret = cli_scanrar(desc, ctx, 0, NULL);

 	    break;

 	case CL_TYPE_ZIP:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_ZIP))

 		ret = cli_scanzip(desc, ctx, 0, NULL);

 	    break;

 	case CL_TYPE_GZ:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_GZ))

 		ret = cli_scangzip(desc, ctx);

 	    break;

 	case CL_TYPE_BZ:

 #ifdef HAVE_BZLIB_H

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_BZ))

 		ret = cli_scanbzip(desc, ctx);

 #endif

 	    break;

 	case CL_TYPE_MSSZDD:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SZDD))

 		ret = cli_scanszdd(desc, ctx);

 	    break;
 

 	case CL_TYPE_MSCAB:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CAB))

 		ret = cli_scanmscab(desc, ctx, 0);

 	    break;
 

 	case CL_TYPE_HTML:

 	    if(SCAN_HTML && (DCONF_DOC & DOC_CONF_HTML))

 		ret = cli_scanhtml(desc, ctx);
 	    break;
 
 	case CL_TYPE_HTML_UTF16:

 	    if(SCAN_HTML && (DCONF_DOC & DOC_CONF_HTML))

 		ret = cli_scanhtml_utf16(desc, ctx);
 	    break;
 

 	case CL_TYPE_RTF:

 	    if(DCONF_DOC & DOC_CONF_RTF)
 		ret = cli_scanrtf(desc, ctx);

 	    break;
 

 	case CL_TYPE_MAIL:

 	    if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_MBOX))

 		ret = cli_scanmail(desc, ctx);

 	    break;

 	case CL_TYPE_TNEF:

 	    if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_TNEF))

 		ret = cli_scantnef(desc, ctx);

 	    break;
 

 	case CL_TYPE_UUENCODED:

 	    if(DCONF_OTHER & OTHER_CONF_UUENC)

 		ret = cli_scanuuencoded(desc, ctx);

 	    break;
 

 	case CL_TYPE_PST:

 	    if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_PST))

 		ret = cli_scanpst(desc, ctx);
 	    break;
 

 	case CL_TYPE_MSCHM:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CHM))

 		ret = cli_scanmschm(desc, ctx);

 	    break;
 

 	case CL_TYPE_MSOLE2:

 	    if(SCAN_OLE2 && (DCONF_ARCH & ARCH_CONF_OLE2))

 		ret = cli_scanole2(desc, ctx);

 	    break;

 	case CL_TYPE_POSIX_TAR:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_TAR))

 		ret = cli_scantar(desc, ctx, 1);

 	    break;
 
 	case CL_TYPE_OLD_TAR:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_TAR))

 		ret = cli_scantar(desc, ctx, 0);

 	    break;
 
 	case CL_TYPE_BINHEX:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_BINHEX))

 		ret = cli_scanbinhex(desc, ctx);

 	    break;
 

 	case CL_TYPE_SCRENC:

 	    if(DCONF_OTHER & OTHER_CONF_SCRENC)
 		ret = cli_scanscrenc(desc, ctx);

 	    break;
 
 	case CL_TYPE_RIFF:

 	    if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_RIFF))

 		ret = cli_scanriff(desc, ctx->virname);

 	    break;
 

 	case CL_TYPE_GRAPHICS:

 	    if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_JPEG))

 		ret = cli_scanjpeg(desc, ctx->virname);

 	    break;
 

 	case CL_TYPE_PDF:

 	    if(SCAN_ARCHIVE && (DCONF_DOC & DOC_CONF_PDF))    /* you may wish to change this line */

 		ret = cli_scanpdf(desc, ctx);

 	    break;
 

 	case CL_TYPE_CRYPTFF:

 	    if(DCONF_OTHER & OTHER_CONF_CRYPTFF)
 		ret = cli_scancryptff(desc, ctx);

 	    break;
 

 	case CL_TYPE_ELF:

 	    if(SCAN_ELF && ctx->dconf->elf)

 		ret = cli_scanelf(desc, ctx);

 	    break;
 

 	case CL_TYPE_SIS:

 	    if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SIS))

 		ret = cli_scansis(desc, ctx);

 	    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, ctx->virname);

 	    break;

 
 	default:
 	    break;

     }
 

     type == CL_TYPE_MAIL ? ctx->mrec-- : ctx->arec--;

     if(type != CL_TYPE_DATA && ret != CL_VIRUS && !ctx->engine->sdb) {

 	if(cli_scanraw(desc, ctx, type) == CL_VIRUS)

 	    return CL_VIRUS;

     }

     ctx->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 && ctx->dconf->pe)

 		ret = cli_scanpe(desc, ctx);

 	    break;

 
 	default:
 	    break;

     }

     ctx->arec--;

     if(ret == CL_EFORMAT) {

 	cli_dbgmsg("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_engine *engine, const struct cl_limits *limits, unsigned int options)

 {

     cli_ctx ctx;
 
     memset(&ctx, '\0', sizeof(cli_ctx));
     ctx.engine = engine;
     ctx.virname = virname;
     ctx.limits = limits;
     ctx.scanned = scanned;
     ctx.options = options;

     ctx.dconf = (struct cli_dconf *) engine->dconf;

 
     return cli_magic_scandesc(desc, &ctx);

 }
 

 static int cli_scanfile(const char *filename, cli_ctx *ctx)

 {
 	int fd, ret;
 

     /* internal version of cl_scanfile with arec/mrec preserved */

     if((fd = open(filename, O_RDONLY|O_BINARY)) == -1)

 	return CL_EOPEN;
 

     ret = cli_magic_scandesc(fd, ctx);

 
     close(fd);
     return ret;
 }
 

 int cl_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_engine *engine, const struct cl_limits *limits, unsigned int options)

 {
 	int fd, ret;
 

     if((fd = open(filename, O_RDONLY|O_BINARY)) == -1)

 	return CL_EOPEN;
 

     ret = cl_scandesc(fd, virname, scanned, engine, limits, options);

     close(fd);
 
     return ret;
 }