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Diffstat (limited to 'src/analysis/scan/patterns/tokens/atom.h')
-rw-r--r-- | src/analysis/scan/patterns/tokens/atom.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/analysis/scan/patterns/tokens/atom.h b/src/analysis/scan/patterns/tokens/atom.h new file mode 100644 index 0000000..1ef8f40 --- /dev/null +++ b/src/analysis/scan/patterns/tokens/atom.h @@ -0,0 +1,88 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * atom.h - prototypes pour la détermination d'atomes à partir de motifs + * + * Copyright (C) 2023 Cyrille Bagard + * + * This file is part of Chrysalide. + * + * Chrysalide is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * Chrysalide 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 Foobar. If not, see <http://www.gnu.org/licenses/>. + */ + + +#ifndef _ANALYSIS_SCAN_PATTERNS_TOKENS_ATOM_H +#define _ANALYSIS_SCAN_PATTERNS_TOKENS_ATOM_H + + +#include <stdbool.h> + + +#include "../backend.h" +#include "../../../../arch/vmpa.h" +#include "../../../../common/szstr.h" + + + +/* Suivi des motifs réellement recherchés */ +typedef struct _tracked_scan_atom_t +{ + phys_t pos; /* Début de sélection atomique */ + phys_t len; /* Taille de ladite sélection */ + phys_t rem; /* Reste après l'atome */ + + bool fast_check; /* Besoin de vérifications ? */ + + uint32_t tmp_id[2]; /* Couple d'identifiants temp. */ + + patid_t pid; /* Identifiant de la bribe */ + +} tracked_scan_atom_t; + +/* Note l'intêret de rechercher un octet particulier. */ +int rate_byte_quality(bin_t, uint8_t *, size_t *, size_t *); + +/* Annihile l'intêret de rechercher un octet particulier. */ +int unrate_byte_quality(bin_t, uint8_t *, size_t *, size_t *); + +/* Termine la notation d'un ensemble d'octets. */ +int finish_quality_rating(int, size_t, size_t); + +/* Détermine la portion idéale de recherche. */ +void find_best_atom(const sized_binary_t *, size_t , tracked_scan_atom_t *, size_t *); + +/* Etablit la liste des cas de figures ignorant la casse. */ +sized_binary_t *make_atoms_case_insensitive(const sized_binary_t *, const tracked_scan_atom_t *, size_t); + +/* Mémorisation d'un octet visé avec son masque */ +typedef struct _masked_byte_t +{ + bin_t value; /* Valeur de l'octet visé */ + bin_t mask; /* Masque à appliquer */ + +} masked_byte_t; + +#define MASK_MAX_LEN_FOR_ATOMS 2 + +/* Etablit la liste des cas de figures avec des octets partiels. */ +sized_binary_t *make_atoms_from_masked_bytes(const masked_byte_t *, size_t, size_t *); + +/* Amorce l'insertion de l'atome déterminé d'une série d'octets. */ +bool enroll_prepared_atom(const sized_binary_t *, GEngineBackend *, tracked_scan_atom_t *); + +/* Récupère un identifiant final pour un atome d'octets. */ +bool build_atom_pattern_id(tracked_scan_atom_t *, GEngineBackend *); + + + +#endif /* _ANALYSIS_SCAN_PATTERNS_TOKENS_ATOM_H */ |