97 lines
3.8 KiB
C
97 lines
3.8 KiB
C
/*
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* Support for matcher using PCRE
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*
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* Copyright (C) 2013-2022 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: Kevin Lin
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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_PCRE_H
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#define __MATCHER_PCRE_H
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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 <sys/types.h>
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#include "clamav-types.h"
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#include "dconf.h"
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#include "mpool.h"
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#include "regex_pcre.h"
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#define PCRE_SCAN_NONE 0
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#define PCRE_SCAN_BUFF 1
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#define PCRE_SCAN_FMAP 2
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/* stores offset data */
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struct cli_pcre_off {
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uint32_t *offset, *shift;
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};
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#if HAVE_PCRE
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#define PCRE_BYPASS "7374756c747a676574737265676578"
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#define CLI_PCRE_GLOBAL 0x00000001 /* g */
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#define CLI_PCRE_ENCOMPASS 0x00000002 /* e */
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#define CLI_PCRE_ROLLING 0x00000004 /* r */
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#define CLI_PCRE_DISABLED 0x80000000 /* used for dconf or fail to build */
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struct cli_pcre_meta {
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char *trigger;
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char *virname;
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uint32_t lsigid[3]; /* 0=valid, 1=lsigid, 2=subsigid */
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struct cli_pcre_data pdata;
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/* clamav offset data */
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uint32_t offdata[4];
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uint32_t offset_min, offset_max;
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/* internal flags (bitfield?) */
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uint32_t flags;
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/* performance tracking */
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char *statname; /* freed by us, not cli_events_free */
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uint32_t sigtime_id, sigmatch_id;
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};
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/* PCRE PERFORMANCE DECLARATIONS */
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void cli_pcre_perf_print();
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void cli_pcre_perf_events_destroy();
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/* PCRE MATCHER DECLARATIONS */
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int cli_pcre_init();
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cl_error_t cli_pcre_addpatt(struct cli_matcher *root, const char *virname, const char *trigger, const char *pattern, const char *cflags, const char *offset, const uint32_t *lsigid, unsigned int options);
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cl_error_t cli_pcre_build(struct cli_matcher *root, long long unsigned match_limit, long long unsigned recmatch_limit, const struct cli_dconf *dconf);
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cl_error_t cli_pcre_recaloff(struct cli_matcher *root, struct cli_pcre_off *data, struct cli_target_info *info, cli_ctx *ctx);
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void cli_pcre_freeoff(struct cli_pcre_off *data);
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cl_error_t cli_pcre_scanbuf(const unsigned char *buffer, uint32_t length, const char **virname, struct cli_ac_result **res, const struct cli_matcher *root, struct cli_ac_data *mdata, const struct cli_pcre_off *data, cli_ctx *ctx);
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void cli_pcre_freemeta(struct cli_matcher *root, struct cli_pcre_meta *pm);
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void cli_pcre_freetable(struct cli_matcher *root);
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#else
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/* NO-PCRE DECLARATIONS - defined because encasing everything in '#if' is a pain and because dynamic library mappings are weird */
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#define PCRE_BYPASS ""
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void cli_pcre_perf_print();
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void cli_pcre_perf_events_destroy();
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int cli_pcre_init();
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int cli_pcre_build(struct cli_matcher *root, long long unsigned match_limit, long long unsigned recmatch_limit, const struct cli_dconf *dconf);
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int cli_pcre_scanbuf(const unsigned char *buffer, uint32_t length, const char **virname, struct cli_ac_result **res, const struct cli_matcher *root, struct cli_ac_data *mdata, const struct cli_pcre_off *data, cli_ctx *ctx);
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int cli_pcre_recaloff(struct cli_matcher *root, struct cli_pcre_off *data, struct cli_target_info *info, cli_ctx *ctx);
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void cli_pcre_freeoff(struct cli_pcre_off *data);
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#endif /* HAVE_PCRE */
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#endif /*__MATCHER_PCRE_H*/
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