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/* |
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* Copyright (C) 2013-2019 Cisco Systems, Inc. and/or its affiliates. All rights reserved. |
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* Copyright (C) 2007-2013 Sourcefire, Inc. |
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* |
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* Authors: Tomasz Kojm |
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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
* published by the Free Software Foundation. |
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*
* 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 |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA. |
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*/
#ifndef __MATCHER_H
#define __MATCHER_H
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#include <sys/types.h>
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#include "clamav.h" |
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#include "filetypes.h" |
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#include "others.h" |
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#include "execs.h" |
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|
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struct cli_target_info {
off_t fsize;
struct cli_exe_info exeinfo;
int status; /* 0 == not initialised, 1 == initialised OK, -1 == error */
};
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void cli_targetinfo_init(struct cli_target_info *info);
void cli_targetinfo_destroy(struct cli_target_info *info);
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#include "matcher-ac.h"
#include "matcher-bm.h" |
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#include "matcher-hash.h" |
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#include "matcher-pcre.h" |
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#include "matcher-byte-comp.h" |
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#include "regex_pcre.h" |
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#include "fmap.h" |
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#include "mpool.h"
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// clang-format off
#define CLI_MATCH_METADATA 0xff00
#define CLI_MATCH_WILDCARD 0x0f00
#define CLI_MATCH_CHAR 0x0000
#define CLI_MATCH_NOCASE 0x1000
#define CLI_MATCH_IGNORE 0x0100
#define CLI_MATCH_SPECIAL 0x0200
#define CLI_MATCH_NIBBLE_HIGH 0x0300
#define CLI_MATCH_NIBBLE_LOW 0x0400
#define CLI_TDB_UINT 0
#define CLI_TDB_RANGE 1
#define CLI_TDB_STR 2
#define CLI_TDB_RANGE2 3
#define CLI_TDB_FTYPE 4
#define CLI_TDB_FTYPE_EXPR 5 |
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|
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struct cli_lsig_tdb { |
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uint32_t *val, *range;
char *str;
uint32_t cnt[3];
uint32_t subsigs; |
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const uint32_t *target; |
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const uint32_t *engine, *nos, *ep, *filesize; |
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const uint32_t *container, *handlertype; |
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const uint32_t *intermediates; |
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/* |
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const uint32_t *sectoff, *sectrva, *sectvsz, *sectraw, *sectrsz, |
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*secturva, *sectuvsz, *secturaw, *sectursz; |
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*/ |
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const char *icongrp1, *icongrp2;
uint32_t *macro_ptids; |
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#ifdef USE_MPOOL |
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mpool_t *mempool; |
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#endif |
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};
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// clang-format on
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#define CLI_LSIG_FLAG_PRIVATE 0x01
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struct cli_bc; |
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struct cli_ac_lsig { |
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#define CLI_LSIG_NORMAL 0
#define CLI_YARA_NORMAL 1
#define CLI_YARA_OFFSET 2 |
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uint32_t id; |
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unsigned bc_idx; |
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uint8_t type; |
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uint8_t flag; |
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union {
char *logic; |
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uint8_t *code_start; |
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} u; |
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const char *virname;
struct cli_lsig_tdb tdb;
};
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struct cli_matcher { |
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unsigned int type;
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/* Extended Boyer-Moore */ |
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uint8_t *bm_shift; |
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struct cli_bm_patt **bm_suffix, **bm_pattab; |
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uint32_t *soff, soff_len; /* for PE section sigs */ |
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uint32_t bm_offmode, bm_patterns, bm_reloff_num, bm_absoff_num; |
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|
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/* HASH */ |
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struct cli_hash_patt hm; |
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struct cli_hash_wild hwild; |
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|
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/* Extended Aho-Corasick */ |
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uint32_t ac_partsigs, ac_nodes, ac_lists, ac_patterns, ac_lsigs; |
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struct cli_ac_lsig **ac_lsigtable; |
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struct cli_ac_node *ac_root, **ac_nodetable; |
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struct cli_ac_list **ac_listtable; |
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struct cli_ac_patt **ac_pattable; |
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struct cli_ac_patt **ac_reloff; |
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uint32_t ac_reloff_num, ac_absoff_num; |
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uint8_t ac_mindepth, ac_maxdepth; |
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struct filter *filter; |
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uint16_t maxpatlen; |
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uint8_t ac_only; |
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/* Perl-Compiled Regular Expressions */ |
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#if HAVE_PCRE |
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uint32_t pcre_metas;
struct cli_pcre_meta **pcre_metatable; |
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uint32_t pcre_reloff_num, pcre_absoff_num; |
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#endif |
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|
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/* Byte Compare */
uint32_t bcomp_metas;
struct cli_bcomp_meta **bcomp_metatable;
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/* Bytecode Tracker */
uint32_t linked_bcs;
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#ifdef USE_MPOOL |
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mpool_t *mempool; |
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#endif |
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};
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struct cli_cdb {
char *virname; /* virus name */
cli_file_t ctype; /* container type */
regex_t name; /* filename regex */
size_t csize[2]; /* container size (min, max); if csize[0] != csize[1] |
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* then value of 0 makes the field ignored
*/ |
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size_t fsizec[2]; /* file size in container */
size_t fsizer[2]; /* real file size */
int encrypted; /* file is encrypted; 2 == ignore */
unsigned int filepos[2]; /* file position in container */
int res1; /* reserved / format specific */
void *res2; /* reserved / format specific */ |
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struct cli_cdb *next;
};
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#define CLI_MAX_TARGETS 2 /* maximum filetypes for a specific target */ |
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struct cli_mtarget { |
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cli_file_t target[CLI_MAX_TARGETS]; |
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const char *name; |
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uint8_t idx; /* idx of matcher */ |
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uint8_t ac_only; |
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uint8_t enable_prefiltering; |
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uint8_t target_count; /* must be synced with non-zero values in the target array */ |
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};
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// clang-format off
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#define CLI_MTARGETS 15 |
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static const struct cli_mtarget cli_mtargets[CLI_MTARGETS] = { |
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{ {0, 0}, "GENERIC", 0, 0, 1, 1 },
{ {CL_TYPE_MSEXE, 0}, "PE", 1, 0, 1, 1 },
{ {CL_TYPE_MSOLE2, 0}, "OLE2", 2, 1, 0, 1 },
{ {CL_TYPE_HTML, 0}, "HTML", 3, 1, 0, 1 },
{ {CL_TYPE_MAIL, 0}, "MAIL", 4, 1, 1, 1 },
{ {CL_TYPE_GRAPHICS, 0}, "GRAPHICS", 5, 1, 0, 1 },
{ {CL_TYPE_ELF, 0}, "ELF", 6, 1, 0, 1 },
{ {CL_TYPE_TEXT_ASCII, 0}, "ASCII", 7, 1, 1, 1 },
{ {CL_TYPE_ERROR, 0}, "NOT USED", 8, 1, 0, 1 },
{ {CL_TYPE_MACHO, CL_TYPE_MACHO_UNIBIN}, "MACH-O", 9, 1, 0, 2 },
{ {CL_TYPE_PDF, 0}, "PDF", 10, 1, 0, 1 },
{ {CL_TYPE_SWF, 0}, "FLASH", 11, 1, 0, 1 }, |
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{ {CL_TYPE_JAVA, 0}, "JAVA", 12, 1, 0, 1 }, |
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{ {CL_TYPE_INTERNAL, 0}, "INTERNAL", 13, 1, 0, 1 },
{ {CL_TYPE_OTHER, 0}, "OTHER", 14, 1, 0, 1 } |
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}; |
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#define CLI_OFF_ANY 0xffffffff |
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#define CLI_OFF_NONE 0xfffffffe |
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#define CLI_OFF_ABSOLUTE 1
#define CLI_OFF_EOF_MINUS 2
#define CLI_OFF_EP_PLUS 3
#define CLI_OFF_EP_MINUS 4
#define CLI_OFF_SL_PLUS 5
#define CLI_OFF_SX_PLUS 6 |
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#define CLI_OFF_VERSION 7 |
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#define CLI_OFF_MACRO 8 |
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#define CLI_OFF_SE 9
// clang-format on |
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|
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cl_error_t cli_scanbuff(const unsigned char *buffer, uint32_t length, uint32_t offset, cli_ctx *ctx, cli_file_t ftype, struct cli_ac_data **acdata); |
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cl_error_t cli_scandesc(int desc, cli_ctx *ctx, cli_file_t ftype, uint8_t ftonly, struct cli_matched_type **ftoffset, unsigned int acmode, struct cli_ac_result **acres);
cl_error_t cli_fmap_scandesc(cli_ctx *ctx, cli_file_t ftype, uint8_t ftonly, struct cli_matched_type **ftoffset, unsigned int acmode, struct cli_ac_result **acres, unsigned char *refhash);
cl_error_t cli_exp_eval(cli_ctx *ctx, struct cli_matcher *root, struct cli_ac_data *acdata, struct cli_target_info *target_info, const char *hash);
cl_error_t cli_caloff(const char *offstr, const struct cli_target_info *info, unsigned int target, uint32_t *offdata, uint32_t *offset_min, uint32_t *offset_max); |
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cl_error_t cli_checkfp(unsigned char *digest, size_t size, cli_ctx *ctx);
cl_error_t cli_checkfp_virus(unsigned char *digest, size_t size, cli_ctx *ctx, const char *vname); |
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cl_error_t cli_matchmeta(cli_ctx *ctx, const char *fname, size_t fsizec, size_t fsizer, int encrypted, unsigned int filepos, int res1, void *res2); |
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void cli_targetinfo(struct cli_target_info *info, unsigned int target, fmap_t *map);
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#endif |