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102 lines
3.1 KiB
102 lines
3.1 KiB
/*
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* Copyright (C) 2007-2008 Sourcefire, Inc.
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*
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* Authors: Tomasz Kojm
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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 __MATCHER_H
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#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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#include "cltypes.h"
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#include "md5.h"
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#include "matcher-ac.h"
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#include "matcher-bm.h"
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#include "hashtab.h"
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#define CLI_MATCH_WILDCARD 0xff00
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#define CLI_MATCH_CHAR 0x0000
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#define CLI_MATCH_IGNORE 0x0100
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#define CLI_MATCH_ALTERNATIVE 0x0200
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#define CLI_MATCH_NIBBLE_HIGH 0x0300
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#define CLI_MATCH_NIBBLE_LOW 0x0400
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struct cli_matcher {
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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;
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struct hashset md5_sizes_hs;
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uint32_t *soff, soff_len; /* for PE section sigs */
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uint32_t bm_patterns;
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/* Extended Aho-Corasick */
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uint32_t ac_partsigs, ac_nodes, ac_patterns;
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struct cli_ac_node *ac_root, **ac_nodetable;
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struct cli_ac_patt **ac_pattable;
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uint8_t ac_mindepth, ac_maxdepth;
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uint16_t maxpatlen;
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uint8_t ac_only;
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};
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struct cli_meta_node {
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char *filename, *virname;
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struct cli_meta_node *next;
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int csize, size, method;
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unsigned int crc32, fileno, encrypted, maxdepth;
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};
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struct cli_mtarget {
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cli_file_t target;
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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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};
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#define CLI_MTARGETS 8
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static const struct cli_mtarget cli_mtargets[CLI_MTARGETS] = {
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{ 0, "GENERIC", 0, 0 },
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{ CL_TYPE_MSEXE, "PE", 1, 0 },
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{ CL_TYPE_MSOLE2, "OLE2", 2, 1 },
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{ CL_TYPE_HTML, "HTML", 3, 1 },
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{ CL_TYPE_MAIL, "MAIL", 4, 1 },
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{ CL_TYPE_GRAPHICS, "GRAPHICS", 5, 1 },
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{ CL_TYPE_ELF, "ELF", 6, 1 },
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{ CL_TYPE_TEXT_ASCII, "ASCII", 7, 1 }
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};
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struct cli_target_info {
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off_t fsize;
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struct cli_exe_info exeinfo;
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int8_t status; /* 0 == not initialised, 1 == initialised OK, -1 == error */
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};
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int cli_scanbuff(const unsigned char *buffer, uint32_t length, cli_ctx *ctx, cli_file_t ftype);
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int cli_scandesc(int desc, cli_ctx *ctx, cli_file_t ftype, uint8_t ftonly, struct cli_matched_type **ftoffset, unsigned int acmode);
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int cli_validatesig(cli_file_t ftype, const char *offstr, off_t fileoff, struct cli_target_info *info, int desc, const char *virname);
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off_t cli_caloff(const char *offstr, struct cli_target_info *info, int fd, cli_file_t ftype, int *ret, unsigned int *maxshift);
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#endif
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