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241 lines
7.3 KiB
241 lines
7.3 KiB
/*
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* Copyright (C) 2007 - 2008 Sourcefire, Inc.
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* Author: Tomasz Kojm <tkojm@clamav.net>
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*
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* Copyright (C) 1999 - 2005 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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __OTHERS_H_LC
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#define __OTHERS_H_LC
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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 <stdlib.h>
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#include "cltypes.h"
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#include "clamav.h"
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#include "dconf.h"
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extern uint8_t cli_debug_flag, cli_leavetemps_flag;
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/*
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* CLI_ISCONTAINED(buf1, size1, buf2, size2) checks if buf2 is contained
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* within buf1.
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*
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* buf1 and buf2 are pointers (or offsets) for the main buffer and the
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* sub-buffer respectively, and size1/2 are their sizes
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*
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* The macro can be used to protect against wraps.
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*/
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#define CLI_ISCONTAINED(bb, bb_size, sb, sb_size) \
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(bb_size > 0 && sb_size > 0 && sb_size <= bb_size \
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&& sb >= bb && sb + sb_size <= bb + bb_size && sb + sb_size > bb)
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#define CLI_ISCONTAINED2(bb, bb_size, sb, sb_size) \
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(bb_size > 0 && sb_size >= 0 && sb_size <= bb_size \
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&& sb >= bb && sb + sb_size <= bb + bb_size && sb + sb_size >= bb)
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#define CLI_MAX_ALLOCATION 184549376
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h> /* for NAME_MAX */
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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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# else
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# define NAME_MAX 256
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# endif
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# endif
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#endif
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#if NAME_MAX < 256
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#undef NAME_MAX
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#define NAME_MAX 256
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#endif
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/* internal clamav context */
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typedef struct {
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const char **virname;
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unsigned long int *scanned;
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const struct cli_matcher *root;
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const struct cl_engine *engine;
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const struct cl_limits *limits;
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unsigned long scansize;
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unsigned int options;
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unsigned int recursion;
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unsigned int scannedfiles;
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unsigned int found_possibly_unwanted;
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struct cli_dconf *dconf;
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} cli_ctx;
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#define SCAN_ARCHIVE (ctx->options & CL_SCAN_ARCHIVE)
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#define SCAN_MAIL (ctx->options & CL_SCAN_MAIL)
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#define SCAN_OLE2 (ctx->options & CL_SCAN_OLE2)
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#define SCAN_PDF (ctx->options & CL_SCAN_PDF)
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#define SCAN_HTML (ctx->options & CL_SCAN_HTML)
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#define SCAN_PE (ctx->options & CL_SCAN_PE)
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#define SCAN_ELF (ctx->options & CL_SCAN_ELF)
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#define SCAN_ALGO (ctx->options & CL_SCAN_ALGORITHMIC)
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#define DETECT_ENCRYPTED (ctx->options & CL_SCAN_BLOCKENCRYPTED)
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/* #define BLOCKMAX (ctx->options & CL_SCAN_BLOCKMAX) */
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#define DETECT_BROKEN (ctx->options & CL_SCAN_BLOCKBROKEN)
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/* based on macros from A. Melnikoff */
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#define cbswap16(v) (((v & 0xff) << 8) | (((v) >> 8) & 0xff))
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#define cbswap32(v) ((((v) & 0x000000ff) << 24) | (((v) & 0x0000ff00) << 8) | \
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(((v) & 0x00ff0000) >> 8) | (((v) & 0xff000000) >> 24))
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#define cbswap64(v) ((((v) & 0x00000000000000ff) << 56) | \
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(((v) & 0x000000000000ff00) << 40) | \
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(((v) & 0x0000000000ff0000) << 24) | \
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(((v) & 0x00000000ff000000) << 8) | \
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(((v) & 0x000000ff00000000) >> 8) | \
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(((v) & 0x0000ff0000000000) >> 24) | \
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(((v) & 0x00ff000000000000) >> 40) | \
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(((v) & 0xff00000000000000) >> 56))
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#if WORDS_BIGENDIAN == 0
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/* Little endian */
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#define le16_to_host(v) (v)
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#define le32_to_host(v) (v)
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#define le64_to_host(v) (v)
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#define be16_to_host(v) cbswap16(v)
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#define be32_to_host(v) cbswap32(v)
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#define be64_to_host(v) cbswap64(v)
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#define cli_readint32(buff) (*(const int32_t *)(buff))
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#define cli_readint16(buff) (*(const int16_t *)(buff))
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#define cli_writeint32(offset, value) (*(uint32_t *)(offset)=(uint32_t)(value))
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#else
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/* Big endian */
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#define le16_to_host(v) cbswap16(v)
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#define le32_to_host(v) cbswap32(v)
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#define le64_to_host(v) cbswap64(v)
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#define be16_to_host(v) (v)
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#define be32_to_host(v) (v)
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#define be64_to_host(v) (v)
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static inline int32_t cli_readint32(const char *buff)
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{
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int32_t ret;
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ret = buff[0] & 0xff;
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ret |= (buff[1] & 0xff) << 8;
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ret |= (buff[2] & 0xff) << 16;
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ret |= (buff[3] & 0xff) << 24;
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return ret;
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}
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static inline int16_t cli_readint16(const char *buff)
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{
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int16_t ret;
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ret = buff[0] & 0xff;
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ret |= (buff[1] & 0xff) << 8;
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return ret;
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}
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static inline void cli_writeint32(char *offset, uint32_t value)
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{
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offset[0] = value & 0xff;
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offset[1] = (value & 0xff00) >> 8;
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offset[2] = (value & 0xff0000) >> 16;
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offset[3] = (value & 0xff000000) >> 24;
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}
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#endif
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/* used by: spin, yc (C) aCaB */
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#define CLI_ROL(a,b) a = ( a << (b % (sizeof(a)<<3) )) | (a >> ( (sizeof(a)<<3) - (b % (sizeof(a)<<3 )) ) )
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#define CLI_ROR(a,b) a = ( a >> (b % (sizeof(a)<<3) )) | (a << ( (sizeof(a)<<3) - (b % (sizeof(a)<<3 )) ) )
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/* Implementation independent sign-extended signed right shift */
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#ifdef HAVE_SAR
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#define CLI_SRS(n,s) ((n)>>(s))
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#else
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#define CLI_SRS(n,s) (((n)>>(s)) ^ (1<<(sizeof(n)*8-1-s)) - (1<<(sizeof(n)*8-1-s)))
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#endif
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#define CLI_SAR(n,s) n = CLI_SRS(n,s)
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#ifndef FALSE
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#define FALSE (0)
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#endif
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#ifndef TRUE
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#define TRUE (1)
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#endif
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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#endif
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typedef struct bitset_tag
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{
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unsigned char *bitset;
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unsigned long length;
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} bitset_t;
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#ifdef __GNUC__
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void cli_warnmsg(const char *str, ...) __attribute__((format(printf, 1, 2)));
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#else
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void cli_warnmsg(const char *str, ...);
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#endif
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#ifdef __GNUC__
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void cli_errmsg(const char *str, ...) __attribute__((format(printf, 1, 2)));
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#else
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void cli_errmsg(const char *str, ...);
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#endif
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#ifdef __GNUC__
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void cli_dbgmsg(const char *str, ...) __attribute__((format(printf, 1, 2)));
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#else
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void cli_dbgmsg(const char *str, ...);
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#endif
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void *cli_malloc(size_t nmemb);
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void *cli_calloc(size_t nmemb, size_t size);
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void *cli_realloc(void *ptr, size_t size);
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void *cli_realloc2(void *ptr, size_t size);
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char *cli_strdup(const char *s);
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int cli_rmdirs(const char *dirname);
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unsigned char *cli_md5digest(int desc);
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char *cli_md5stream(FILE *fs, unsigned char *digcpy);
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char *cli_md5file(const char *filename);
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int cli_readn(int fd, void *buff, unsigned int count);
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int cli_writen(int fd, const void *buff, unsigned int count);
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char *cli_gentemp(const char *dir);
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int cli_gentempfd(const char *dir, char **name, int *fd);
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unsigned int cli_rndnum(unsigned int max);
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int cli_filecopy(const char *src, const char *dest);
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bitset_t *cli_bitset_init(void);
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void cli_bitset_free(bitset_t *bs);
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int cli_bitset_set(bitset_t *bs, unsigned long bit_offset);
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int cli_bitset_test(bitset_t *bs, unsigned long bit_offset);
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const char* cli_ctime(const time_t *timep, char *buf, const size_t bufsize);
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int cli_checklimits(const char *, cli_ctx *, unsigned long, unsigned long, unsigned long);
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int cli_updatelimits(cli_ctx *, unsigned long);
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unsigned long cli_getsizelimit(cli_ctx *, unsigned long);
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#endif
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