e3aaff8e | /* |
c1206103 | * Copyright (C) 2007-2013 Sourcefire, Inc. |
4addba22 | * |
2023340a | * Authors: Tomasz Kojm |
e3aaff8e | * * This program is free software; you can redistribute it and/or modify |
bb34cb31 | * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. |
e3aaff8e | * * 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 |
48b7b4a7 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. |
e3aaff8e | */ #ifndef __MATCHER_H #define __MATCHER_H |
841161e0 | #include <sys/types.h> |
e3aaff8e | #include "clamav.h" |
a85bd2ac | #include "filetypes.h" |
3c91998b | #include "others.h" |
841161e0 | #include "execs.h" #include "cltypes.h" |
e3aaff8e | |
294558a5 | struct cli_target_info { off_t fsize; struct cli_exe_info exeinfo; int status; /* 0 == not initialised, 1 == initialised OK, -1 == error */ }; |
bedc58de | #include "matcher-ac.h" #include "matcher-bm.h" |
c802edd5 | #include "matcher-hash.h" |
048d7677 | #include "fmap.h" |
b94e66c4 | #include "mpool.h" |
bedc58de | #define CLI_MATCH_WILDCARD 0xff00 |
ecf5865b | #define CLI_MATCH_CHAR 0x0000 |
bedc58de | #define CLI_MATCH_IGNORE 0x0100 |
a6d4c62e | #define CLI_MATCH_SPECIAL 0x0200 |
bedc58de | #define CLI_MATCH_NIBBLE_HIGH 0x0300 #define CLI_MATCH_NIBBLE_LOW 0x0400 |
677fc4ba | struct cli_lsig_tdb { #define CLI_TDB_UINT 0 #define CLI_TDB_RANGE 1 #define CLI_TDB_STR 2 #define CLI_TDB_RANGE2 3 |
4168b010 | #define CLI_TDB_FTYPE 4 |
677fc4ba | uint32_t *val, *range; char *str; uint32_t cnt[3]; |
2545f976 | uint32_t subsigs; |
677fc4ba | const uint32_t *target; |
17cfd76f | const uint32_t *engine, *nos, *ep, *filesize; |
7770d314 | const uint32_t *container, *handlertype; |
0f7ba617 | /* |
677fc4ba | const uint32_t *sectoff, *sectrva, *sectvsz, *sectraw, *sectrsz, *secturva, *sectuvsz, *secturaw, *sectursz; |
0f7ba617 | */ const char *icongrp1, *icongrp2; |
ab893605 | uint32_t *macro_ptids; |
0d9dbdef | #ifdef USE_MPOOL |
47d40feb | mpool_t *mempool; |
0d9dbdef | #endif |
677fc4ba | }; |
459b13ed | struct cli_bc; |
677fc4ba | struct cli_ac_lsig { uint32_t id; |
2545f976 | unsigned bc_idx; |
677fc4ba | char *logic; const char *virname; struct cli_lsig_tdb tdb; }; |
bedc58de | struct cli_matcher { |
33872a43 | unsigned int type; |
bedc58de | /* Extended Boyer-Moore */ |
ab1db3b3 | uint8_t *bm_shift; |
006f5fe6 | struct cli_bm_patt **bm_suffix, **bm_pattab; |
0a3d4094 | uint32_t *soff, soff_len; /* for PE section sigs */ |
006f5fe6 | uint32_t bm_offmode, bm_patterns, bm_reloff_num, bm_absoff_num; |
bedc58de | |
3faa9783 | /* HASH */ |
c802edd5 | struct cli_hash_patt hm; |
e37613ad | struct cli_hash_wild hwild; |
c802edd5 | |
bedc58de | /* Extended Aho-Corasick */ |
677fc4ba | uint32_t ac_partsigs, ac_nodes, ac_patterns, ac_lsigs; struct cli_ac_lsig **ac_lsigtable; |
bedc58de | struct cli_ac_node *ac_root, **ac_nodetable; |
fbcef1b0 | struct cli_ac_patt **ac_pattable; |
33872a43 | struct cli_ac_patt **ac_reloff; |
aca9ea82 | uint32_t ac_reloff_num, ac_absoff_num; |
b5231f5f | uint8_t ac_mindepth, ac_maxdepth; |
02eabc6d | struct filter *filter; |
b5231f5f | uint16_t maxpatlen; uint8_t ac_only; |
0728972e | #ifdef USE_MPOOL |
47d40feb | mpool_t *mempool; |
0728972e | #endif |
bedc58de | }; |
55094a9c | 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] * then value of 0 makes the field ignored */ size_t fsizec[2]; /* file size in container */ size_t fsizer[2]; /* real file size */ int encrypted; /* file is encrypted; 2 == ignore */ |
15f413d1 | int filepos[2]; /* file position in container */ int res1; /* reserved / format specific */ |
55094a9c | void *res2; /* reserved / format specific */ struct cli_cdb *next; }; |
2c0fa85f | #define CLI_MAX_TARGETS 2 /* maximum filetypes for a specific target */ |
4addba22 | struct cli_mtarget { |
2c0fa85f | cli_file_t target[CLI_MAX_TARGETS]; |
4addba22 | const char *name; uint8_t idx; /* idx of matcher */ uint8_t ac_only; |
02eabc6d | uint8_t enable_prefiltering; |
2c0fa85f | uint8_t target_count; /* must be synced with non-zero values in the target array */ |
4addba22 | }; |
703a9258 | #define CLI_MTARGETS 13 |
4addba22 | static const struct cli_mtarget cli_mtargets[CLI_MTARGETS] = { |
2c0fa85f | { {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 }, { {CL_TYPE_JAVA, 0}, "JAVA", 12, 1, 0, 1 } |
4addba22 | }; |
b68d11d2 | |
33872a43 | #define CLI_OFF_ANY 0xffffffff #define CLI_OFF_NONE 0xfffffffe #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 |
d2ba6f98 | #define CLI_OFF_VERSION 7 |
ab893605 | #define CLI_OFF_MACRO 8 |
e067b3b4 | #define CLI_OFF_SE 9 |
33872a43 | |
e06afe8e | int cli_scanbuff(const unsigned char *buffer, uint32_t length, uint32_t offset, cli_ctx *ctx, cli_file_t ftype, struct cli_ac_data **acdata); |
5612732c | |
ffa9b060 | int 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); int 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); |
b240ee01 | int cli_lsig_eval(cli_ctx *ctx, struct cli_matcher *root, struct cli_ac_data *acdata, struct cli_target_info *target_info, const char *hash); |
294558a5 | int 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); |
53721687 | |
32b1e04e | int cli_checkfp(unsigned char *digest, size_t size, cli_ctx *ctx); |
e4101980 | |
b33354e5 | int cli_matchmeta(cli_ctx *ctx, const char *fname, size_t fsizec, size_t fsizer, int encrypted, unsigned int filepos, int res1, void *res2); |
55094a9c | |
c1206103 | void cli_targetinfo(struct cli_target_info *info, unsigned int target, fmap_t *map); |
e3aaff8e | #endif |