diff options
Diffstat (limited to 'src/analysis/scan/items/magic')
-rw-r--r-- | src/analysis/scan/items/magic/Makefile.am | 16 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/cookie.c | 122 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/cookie.h | 44 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/mime-encoding.c | 270 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/mime-encoding.h | 58 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/mime-type.c | 270 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/mime-type.h | 58 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/type.c | 270 | ||||
-rw-r--r-- | src/analysis/scan/items/magic/type.h | 58 |
9 files changed, 1166 insertions, 0 deletions
diff --git a/src/analysis/scan/items/magic/Makefile.am b/src/analysis/scan/items/magic/Makefile.am new file mode 100644 index 0000000..1d741ff --- /dev/null +++ b/src/analysis/scan/items/magic/Makefile.am @@ -0,0 +1,16 @@ + +noinst_LTLIBRARIES = libanalysisscanitemsmagic.la + + +libanalysisscanitemsmagic_la_SOURCES = \ + cookie.h cookie.c \ + mime-encoding.h mime-encoding.c \ + mime-type.h mime-type.c \ + type.h type.c + +libanalysisscanitemsmagic_la_CFLAGS = $(LIBGOBJ_CFLAGS) $(LIBMAGIC_CFLAGS) + + +devdir = $(includedir)/chrysalide/$(subdir:src/%=core/%) + +dev_HEADERS = $(libanalysisscanitemsmagic_la_SOURCES:%c=) diff --git a/src/analysis/scan/items/magic/cookie.c b/src/analysis/scan/items/magic/cookie.c new file mode 100644 index 0000000..41f26a0 --- /dev/null +++ b/src/analysis/scan/items/magic/cookie.c @@ -0,0 +1,122 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * cookie.c - chargement des motifs de reconnaissance de contenus + * + * 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/>. + */ + + +#include "cookie.h" + + +#include <assert.h> + + +#include <i18n.h> + + +#include "../../../../core/logs.h" + + + +/* Référence des bibliothèques de reconnaissance */ +static magic_t __magic_cookie = 0; + + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Charge les motifs de reconnaissance de contenus. * +* * +* Retour : Bilan de l'opération de chargemement. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool init_magic_cookie(void) +{ + bool result; /* Bilan à retourner */ + int ret; /* Bilan d'une opération */ + + __magic_cookie = magic_open(0); + + ret = magic_load(__magic_cookie, NULL); + result = (ret != -1); + + if (!result) + log_variadic_message(LMT_EXT_ERROR, _("cannot load magic database: %s"), magic_error(__magic_cookie)); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Décharge les motifs de reconnaissance de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void exit_magic_cookie(void) +{ + magic_close(__magic_cookie); + +} + + +/****************************************************************************** +* * +* Paramètres : flags = forme de reconnaissance à préparer. * +* * +* Description : Fournit la référence aux mécanismes de reconnaissance. * +* * +* Retour : Cookie prêt à emploi. * +* * +* Remarques : - * +* * +******************************************************************************/ + +magic_t get_magic_cookie(int flags) +{ + magic_t result; /* Référence à retourner */ +#ifndef NDEBUG + int ret; /* Bilan de la préparation */ +#endif + + result = __magic_cookie; + assert(result != 0); + +#ifndef NDEBUG + ret = magic_setflags(result, flags); + assert(ret != -1); +#else + magic_setflags(result, flags); +#endif + + return result; + +} diff --git a/src/analysis/scan/items/magic/cookie.h b/src/analysis/scan/items/magic/cookie.h new file mode 100644 index 0000000..0ee2274 --- /dev/null +++ b/src/analysis/scan/items/magic/cookie.h @@ -0,0 +1,44 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * cookie.h - prototypes pour le chargement des motifs de reconnaissance de contenus + * + * 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_ITEMS_MAGIC_COOKIE_H +#define _ANALYSIS_SCAN_ITEMS_MAGIC_COOKIE_H + + +#include <magic.h> +#include <stdbool.h> + + + +/* Charge les motifs de reconnaissance de contenus. */ +bool init_magic_cookie(void); + +/* Décharge les motifs de reconnaissance de contenus. */ +void exit_magic_cookie(void); + +/* Fournit la référence aux mécanismes de reconnaissance. */ +magic_t get_magic_cookie(int); + + + +#endif /* _ANALYSIS_SCAN_ITEMS_MAGIC_COOKIE_H */ diff --git a/src/analysis/scan/items/magic/mime-encoding.c b/src/analysis/scan/items/magic/mime-encoding.c new file mode 100644 index 0000000..935515d --- /dev/null +++ b/src/analysis/scan/items/magic/mime-encoding.c @@ -0,0 +1,270 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * mime-encoding.c - reconnaissance de l'encodage d'un contenu + * + * 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/>. + */ + + +#include "mime-encoding.h" + + +#include "cookie.h" +#include "../../item-int.h" +#include "../../exprs/literal.h" + + + +/* ---------------------- INTRODUCTION D'UNE NOUVELLE FONCTION ---------------------- */ + + +/* Initialise la classe des reconnaissances de contenus. */ +static void g_scan_mime_encoding_function_class_init(GScanMimeEncodingFunctionClass *); + +/* Initialise une instance de reconnaissance de contenus. */ +static void g_scan_mime_encoding_function_init(GScanMimeEncodingFunction *); + +/* Supprime toutes les références externes. */ +static void g_scan_mime_encoding_function_dispose(GScanMimeEncodingFunction *); + +/* Procède à la libération totale de la mémoire. */ +static void g_scan_mime_encoding_function_finalize(GScanMimeEncodingFunction *); + + + +/* --------------------- IMPLEMENTATION DES FONCTIONS DE CLASSE --------------------- */ + + +/* Indique le nom associé à une expression d'évaluation. */ +static char *g_scan_mime_encoding_function_get_name(const GScanMimeEncodingFunction *); + +/* Réduit une expression à une forme plus simple. */ +static bool g_scan_mime_encoding_function_run_call(GScanMimeEncodingFunction *, GScanExpression **, size_t, GScanContext *, GScanScope *, GObject **); + + + +/* ---------------------------------------------------------------------------------- */ +/* INTRODUCTION D'UNE NOUVELLE FONCTION */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une reconnaissance d'encodages de contenus. */ +G_DEFINE_TYPE(GScanMimeEncodingFunction, g_scan_mime_encoding_function, G_TYPE_REGISTERED_ITEM); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des reconnaissances de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_encoding_function_class_init(GScanMimeEncodingFunctionClass *klass) +{ + GObjectClass *object; /* Autre version de la classe */ + GRegisteredItemClass *registered; /* Version de classe parente */ + + object = G_OBJECT_CLASS(klass); + + object->dispose = (GObjectFinalizeFunc/* ! */)g_scan_mime_encoding_function_dispose; + object->finalize = (GObjectFinalizeFunc)g_scan_mime_encoding_function_finalize; + + registered = G_REGISTERED_ITEM_CLASS(klass); + + registered->get_name = (get_registered_item_name_fc)g_scan_mime_encoding_function_get_name; + registered->run_call = (run_registered_item_call_fc)g_scan_mime_encoding_function_run_call; + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance à initialiser. * +* * +* Description : Initialise une instance de reconnaissance de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_encoding_function_init(GScanMimeEncodingFunction *func) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_encoding_function_dispose(GScanMimeEncodingFunction *func) +{ + G_OBJECT_CLASS(g_scan_mime_encoding_function_parent_class)->dispose(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_encoding_function_finalize(GScanMimeEncodingFunction *func) +{ + G_OBJECT_CLASS(g_scan_mime_encoding_function_parent_class)->finalize(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Constitue une fonction de cernement d'encodages de contenus. * +* * +* Retour : Fonction mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GRegisteredItem *g_scan_mime_encoding_function_new(void) +{ + GRegisteredItem *result; /* Structure à retourner */ + + result = g_object_new(G_TYPE_SCAN_MIME_ENCODING_FUNCTION, NULL); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* IMPLEMENTATION DES FONCTIONS DE CLASSE */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* * +* Description : Indique le nom associé à une expression d'évaluation. * +* * +* Retour : Désignation humaine de l'expression d'évaluation. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static char *g_scan_mime_encoding_function_get_name(const GScanMimeEncodingFunction *item) +{ + char *result; /* Désignation à retourner */ + + result = strdup("mime_encoding"); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* args = liste d'éventuels arguments fournis. * +* count = taille de cette liste. * +* ctx = contexte de suivi de l'analyse courante. * +* scope = portée courante des variables locales. * +* out = zone d'enregistrement de la résolution opérée. [OUT] * +* * +* Description : Réduit une expression à une forme plus simple. * +* * +* Retour : Réduction correspondante, expression déjà réduite, ou NULL. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_mime_encoding_function_run_call(GScanMimeEncodingFunction *item, GScanExpression **args, size_t count, GScanContext *ctx, GScanScope *scope, GObject **out) +{ + bool result; /* Bilan à retourner */ + magic_t cookie; /* Référence des bibliothèques */ + GBinContent *content; /* Contenu à manipuler */ + vmpa2t pos; /* Tête de lecture */ + phys_t size; /* Quantité de données dispos. */ + const bin_t *data; /* Accès à des données */ + const char *desc; /* Description du contenu */ + sized_string_t string; /* Description à diffuser */ + + result = (count == 0); + if (!result) goto exit; + + cookie = get_magic_cookie(MAGIC_MIME_ENCODING); + + content = g_scan_context_get_content(ctx); + + g_binary_content_compute_start_pos(content, &pos); + + size = g_binary_content_compute_size(content); + + data = g_binary_content_get_raw_access(content, &pos, size); + + desc = magic_buffer(cookie, data, size); + + if (desc != NULL) + { + string.data = (char *)desc; + string.len = strlen(desc); + } + else + { + string.data = ""; + string.len = 0; + } + + *out = G_OBJECT(g_scan_literal_expression_new(LVT_STRING, &string)); + + g_object_unref(G_OBJECT(content)); + + exit: + + return result; + +} diff --git a/src/analysis/scan/items/magic/mime-encoding.h b/src/analysis/scan/items/magic/mime-encoding.h new file mode 100644 index 0000000..9349d55 --- /dev/null +++ b/src/analysis/scan/items/magic/mime-encoding.h @@ -0,0 +1,58 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * mime-encoding.h - prototypes pour la reconnaissance de l'encodage d'un contenu + * + * 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_ITEMS_MAGIC_MIME_ENCODING_H +#define _ANALYSIS_SCAN_ITEMS_MAGIC_MIME_ENCODING_H + + +#include <glib-object.h> + + +#include "../../item.h" + + + +#define G_TYPE_SCAN_MIME_ENCODING_FUNCTION g_scan_mime_encoding_function_get_type() +#define G_SCAN_MIME_ENCODING_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_SCAN_MIME_ENCODING_FUNCTION, GScanMimeEncodingFunction)) +#define G_IS_SCAN_MIME_ENCODING_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), G_TYPE_SCAN_MIME_ENCODING_FUNCTION)) +#define G_SCAN_MIME_ENCODING_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), G_TYPE_SCAN_MIME_ENCODING_FUNCTION, GScanMimeEncodingFunctionClass)) +#define G_IS_SCAN_MIME_ENCODING_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), G_TYPE_SCAN_MIME_ENCODING_FUNCTION)) +#define G_SCAN_MIME_ENCODING_FUNCTION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_SCAN_MIME_ENCODING_FUNCTION, GScanMimeEncodingFunctionClass)) + + +/* Reconnaissance d'encodages de contenus (instance) */ +typedef GRegisteredItem GScanMimeEncodingFunction; + +/* Reconnaissance d'encodages de contenus (classe) */ +typedef GRegisteredItemClass GScanMimeEncodingFunctionClass; + + +/* Indique le type défini pour une reconnaissance d'encodages de contenus. */ +GType g_scan_mime_encoding_function_get_type(void); + +/* Constitue une fonction de cernement d'encodages de contenus. */ +GRegisteredItem *g_scan_mime_encoding_function_new(void); + + + +#endif /* _ANALYSIS_SCAN_ITEMS_MAGIC_MIME_ENCODING_H */ diff --git a/src/analysis/scan/items/magic/mime-type.c b/src/analysis/scan/items/magic/mime-type.c new file mode 100644 index 0000000..95e441d --- /dev/null +++ b/src/analysis/scan/items/magic/mime-type.c @@ -0,0 +1,270 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * type.c - reconnaissance du type MIME d'un contenu + * + * 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/>. + */ + + +#include "mime-type.h" + + +#include "cookie.h" +#include "../../item-int.h" +#include "../../exprs/literal.h" + + + +/* ---------------------- INTRODUCTION D'UNE NOUVELLE FONCTION ---------------------- */ + + +/* Initialise la classe des reconnaissances de contenus. */ +static void g_scan_mime_type_function_class_init(GScanMimeTypeFunctionClass *); + +/* Initialise une instance de reconnaissance de contenus. */ +static void g_scan_mime_type_function_init(GScanMimeTypeFunction *); + +/* Supprime toutes les références externes. */ +static void g_scan_mime_type_function_dispose(GScanMimeTypeFunction *); + +/* Procède à la libération totale de la mémoire. */ +static void g_scan_mime_type_function_finalize(GScanMimeTypeFunction *); + + + +/* --------------------- IMPLEMENTATION DES FONCTIONS DE CLASSE --------------------- */ + + +/* Indique le nom associé à une expression d'évaluation. */ +static char *g_scan_mime_type_function_get_name(const GScanMimeTypeFunction *); + +/* Réduit une expression à une forme plus simple. */ +static bool g_scan_mime_type_function_run_call(GScanMimeTypeFunction *, GScanExpression **, size_t, GScanContext *, GScanScope *, GObject **); + + + +/* ---------------------------------------------------------------------------------- */ +/* INTRODUCTION D'UNE NOUVELLE FONCTION */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une reconnaissance de types de contenus. */ +G_DEFINE_TYPE(GScanMimeTypeFunction, g_scan_mime_type_function, G_TYPE_REGISTERED_ITEM); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des reconnaissances de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_type_function_class_init(GScanMimeTypeFunctionClass *klass) +{ + GObjectClass *object; /* Autre version de la classe */ + GRegisteredItemClass *registered; /* Version de classe parente */ + + object = G_OBJECT_CLASS(klass); + + object->dispose = (GObjectFinalizeFunc/* ! */)g_scan_mime_type_function_dispose; + object->finalize = (GObjectFinalizeFunc)g_scan_mime_type_function_finalize; + + registered = G_REGISTERED_ITEM_CLASS(klass); + + registered->get_name = (get_registered_item_name_fc)g_scan_mime_type_function_get_name; + registered->run_call = (run_registered_item_call_fc)g_scan_mime_type_function_run_call; + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance à initialiser. * +* * +* Description : Initialise une instance de reconnaissance de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_type_function_init(GScanMimeTypeFunction *func) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_type_function_dispose(GScanMimeTypeFunction *func) +{ + G_OBJECT_CLASS(g_scan_mime_type_function_parent_class)->dispose(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_mime_type_function_finalize(GScanMimeTypeFunction *func) +{ + G_OBJECT_CLASS(g_scan_mime_type_function_parent_class)->finalize(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Constitue une fonction d'identification de types de contenus.* +* * +* Retour : Fonction mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GRegisteredItem *g_scan_mime_type_function_new(void) +{ + GRegisteredItem *result; /* Structure à retourner */ + + result = g_object_new(G_TYPE_SCAN_MIME_TYPE_FUNCTION, NULL); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* IMPLEMENTATION DES FONCTIONS DE CLASSE */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* * +* Description : Indique le nom associé à une expression d'évaluation. * +* * +* Retour : Désignation humaine de l'expression d'évaluation. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static char *g_scan_mime_type_function_get_name(const GScanMimeTypeFunction *item) +{ + char *result; /* Désignation à retourner */ + + result = strdup("mime_type"); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* args = liste d'éventuels arguments fournis. * +* count = taille de cette liste. * +* ctx = contexte de suivi de l'analyse courante. * +* scope = portée courante des variables locales. * +* out = zone d'enregistrement de la résolution opérée. [OUT] * +* * +* Description : Réduit une expression à une forme plus simple. * +* * +* Retour : Réduction correspondante, expression déjà réduite, ou NULL. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_mime_type_function_run_call(GScanMimeTypeFunction *item, GScanExpression **args, size_t count, GScanContext *ctx, GScanScope *scope, GObject **out) +{ + bool result; /* Bilan à retourner */ + magic_t cookie; /* Référence des bibliothèques */ + GBinContent *content; /* Contenu à manipuler */ + vmpa2t pos; /* Tête de lecture */ + phys_t size; /* Quantité de données dispos. */ + const bin_t *data; /* Accès à des données */ + const char *desc; /* Description du contenu */ + sized_string_t string; /* Description à diffuser */ + + result = (count == 0); + if (!result) goto exit; + + cookie = get_magic_cookie(MAGIC_MIME_TYPE); + + content = g_scan_context_get_content(ctx); + + g_binary_content_compute_start_pos(content, &pos); + + size = g_binary_content_compute_size(content); + + data = g_binary_content_get_raw_access(content, &pos, size); + + desc = magic_buffer(cookie, data, size); + + if (desc != NULL) + { + string.data = (char *)desc; + string.len = strlen(desc); + } + else + { + string.data = ""; + string.len = 0; + } + + *out = G_OBJECT(g_scan_literal_expression_new(LVT_STRING, &string)); + + g_object_unref(G_OBJECT(content)); + + exit: + + return result; + +} diff --git a/src/analysis/scan/items/magic/mime-type.h b/src/analysis/scan/items/magic/mime-type.h new file mode 100644 index 0000000..e02ce0f --- /dev/null +++ b/src/analysis/scan/items/magic/mime-type.h @@ -0,0 +1,58 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * mime-type.h - prototypes pour la reconnaissance du type MIME d'un contenu + * + * 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_ITEMS_MAGIC_MIME_TYPE_H +#define _ANALYSIS_SCAN_ITEMS_MAGIC_MIME_TYPE_H + + +#include <glib-object.h> + + +#include "../../item.h" + + + +#define G_TYPE_SCAN_MIME_TYPE_FUNCTION g_scan_mime_type_function_get_type() +#define G_SCAN_MIME_TYPE_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_SCAN_MIME_TYPE_FUNCTION, GScanMimeTypeFunction)) +#define G_IS_SCAN_MIME_TYPE_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), G_TYPE_SCAN_MIME_TYPE_FUNCTION)) +#define G_SCAN_MIME_TYPE_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), G_TYPE_SCAN_MIME_TYPE_FUNCTION, GScanMimeTypeFunctionClass)) +#define G_IS_SCAN_MIME_TYPE_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), G_TYPE_SCAN_MIME_TYPE_FUNCTION)) +#define G_SCAN_MIME_TYPE_FUNCTION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_SCAN_MIME_TYPE_FUNCTION, GScanMimeTypeFunctionClass)) + + +/* Reconnaissance de types de contenus (instance) */ +typedef GRegisteredItem GScanMimeTypeFunction; + +/* Reconnaissance de types de contenus (classe) */ +typedef GRegisteredItemClass GScanMimeTypeFunctionClass; + + +/* Indique le type défini pour une reconnaissance de types de contenus. */ +GType g_scan_mime_type_function_get_type(void); + +/* Constitue une fonction d'identification de types de contenus. */ +GRegisteredItem *g_scan_mime_type_function_new(void); + + + +#endif /* _ANALYSIS_SCAN_ITEMS_MAGIC_MIME_TYPE_H */ diff --git a/src/analysis/scan/items/magic/type.c b/src/analysis/scan/items/magic/type.c new file mode 100644 index 0000000..f87c34a --- /dev/null +++ b/src/analysis/scan/items/magic/type.c @@ -0,0 +1,270 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * type.c - reconnaissance du type d'un contenu + * + * 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/>. + */ + + +#include "type.h" + + +#include "cookie.h" +#include "../../item-int.h" +#include "../../exprs/literal.h" + + + +/* ---------------------- INTRODUCTION D'UNE NOUVELLE FONCTION ---------------------- */ + + +/* Initialise la classe des reconnaissances de contenus. */ +static void g_scan_magic_type_function_class_init(GScanMagicTypeFunctionClass *); + +/* Initialise une instance de reconnaissance de contenus. */ +static void g_scan_magic_type_function_init(GScanMagicTypeFunction *); + +/* Supprime toutes les références externes. */ +static void g_scan_magic_type_function_dispose(GScanMagicTypeFunction *); + +/* Procède à la libération totale de la mémoire. */ +static void g_scan_magic_type_function_finalize(GScanMagicTypeFunction *); + + + +/* --------------------- IMPLEMENTATION DES FONCTIONS DE CLASSE --------------------- */ + + +/* Indique le nom associé à une expression d'évaluation. */ +static char *g_scan_magic_type_function_get_name(const GScanMagicTypeFunction *); + +/* Réduit une expression à une forme plus simple. */ +static bool g_scan_magic_type_function_run_call(GScanMagicTypeFunction *, GScanExpression **, size_t, GScanContext *, GScanScope *, GObject **); + + + +/* ---------------------------------------------------------------------------------- */ +/* INTRODUCTION D'UNE NOUVELLE FONCTION */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une reconnaissance de types de contenus. */ +G_DEFINE_TYPE(GScanMagicTypeFunction, g_scan_magic_type_function, G_TYPE_REGISTERED_ITEM); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des reconnaissances de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_magic_type_function_class_init(GScanMagicTypeFunctionClass *klass) +{ + GObjectClass *object; /* Autre version de la classe */ + GRegisteredItemClass *registered; /* Version de classe parente */ + + object = G_OBJECT_CLASS(klass); + + object->dispose = (GObjectFinalizeFunc/* ! */)g_scan_magic_type_function_dispose; + object->finalize = (GObjectFinalizeFunc)g_scan_magic_type_function_finalize; + + registered = G_REGISTERED_ITEM_CLASS(klass); + + registered->get_name = (get_registered_item_name_fc)g_scan_magic_type_function_get_name; + registered->run_call = (run_registered_item_call_fc)g_scan_magic_type_function_run_call; + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance à initialiser. * +* * +* Description : Initialise une instance de reconnaissance de contenus. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_magic_type_function_init(GScanMagicTypeFunction *func) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_magic_type_function_dispose(GScanMagicTypeFunction *func) +{ + G_OBJECT_CLASS(g_scan_magic_type_function_parent_class)->dispose(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : func = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_magic_type_function_finalize(GScanMagicTypeFunction *func) +{ + G_OBJECT_CLASS(g_scan_magic_type_function_parent_class)->finalize(G_OBJECT(func)); + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Constitue une fonction d'identification de types de contenus.* +* * +* Retour : Fonction mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GRegisteredItem *g_scan_magic_type_function_new(void) +{ + GRegisteredItem *result; /* Structure à retourner */ + + result = g_object_new(G_TYPE_SCAN_MAGIC_TYPE_FUNCTION, NULL); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* IMPLEMENTATION DES FONCTIONS DE CLASSE */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* * +* Description : Indique le nom associé à une expression d'évaluation. * +* * +* Retour : Désignation humaine de l'expression d'évaluation. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static char *g_scan_magic_type_function_get_name(const GScanMagicTypeFunction *item) +{ + char *result; /* Désignation à retourner */ + + result = strdup("type"); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* args = liste d'éventuels arguments fournis. * +* count = taille de cette liste. * +* ctx = contexte de suivi de l'analyse courante. * +* scope = portée courante des variables locales. * +* out = zone d'enregistrement de la résolution opérée. [OUT] * +* * +* Description : Réduit une expression à une forme plus simple. * +* * +* Retour : Réduction correspondante, expression déjà réduite, ou NULL. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_magic_type_function_run_call(GScanMagicTypeFunction *item, GScanExpression **args, size_t count, GScanContext *ctx, GScanScope *scope, GObject **out) +{ + bool result; /* Bilan à retourner */ + magic_t cookie; /* Référence des bibliothèques */ + GBinContent *content; /* Contenu à manipuler */ + vmpa2t pos; /* Tête de lecture */ + phys_t size; /* Quantité de données dispos. */ + const bin_t *data; /* Accès à des données */ + const char *desc; /* Description du contenu */ + sized_string_t string; /* Description à diffuser */ + + result = (count == 0); + if (!result) goto exit; + + cookie = get_magic_cookie(MAGIC_NONE); + + content = g_scan_context_get_content(ctx); + + g_binary_content_compute_start_pos(content, &pos); + + size = g_binary_content_compute_size(content); + + data = g_binary_content_get_raw_access(content, &pos, size); + + desc = magic_buffer(cookie, data, size); + + if (desc != NULL) + { + string.data = (char *)desc; + string.len = strlen(desc); + } + else + { + string.data = ""; + string.len = 0; + } + + *out = G_OBJECT(g_scan_literal_expression_new(LVT_STRING, &string)); + + g_object_unref(G_OBJECT(content)); + + exit: + + return result; + +} diff --git a/src/analysis/scan/items/magic/type.h b/src/analysis/scan/items/magic/type.h new file mode 100644 index 0000000..bfad213 --- /dev/null +++ b/src/analysis/scan/items/magic/type.h @@ -0,0 +1,58 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * type.h - prototypes pour la reconnaissance du type d'un contenu + * + * 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_ITEMS_MAGIC_TYPE_H +#define _ANALYSIS_SCAN_ITEMS_MAGIC_TYPE_H + + +#include <glib-object.h> + + +#include "../../item.h" + + + +#define G_TYPE_SCAN_MAGIC_TYPE_FUNCTION g_scan_magic_type_function_get_type() +#define G_SCAN_MAGIC_TYPE_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_SCAN_MAGIC_TYPE_FUNCTION, GScanMagicTypeFunction)) +#define G_IS_SCAN_MAGIC_TYPE_FUNCTION(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), G_TYPE_SCAN_MAGIC_TYPE_FUNCTION)) +#define G_SCAN_MAGIC_TYPE_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), G_TYPE_SCAN_MAGIC_TYPE_FUNCTION, GScanMagicTypeFunctionClass)) +#define G_IS_SCAN_MAGIC_TYPE_FUNCTION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), G_TYPE_SCAN_MAGIC_TYPE_FUNCTION)) +#define G_SCAN_MAGIC_TYPE_FUNCTION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_SCAN_MAGIC_TYPE_FUNCTION, GScanMagicTypeFunctionClass)) + + +/* Reconnaissance de types de contenus (instance) */ +typedef GRegisteredItem GScanMagicTypeFunction; + +/* Reconnaissance de types de contenus (classe) */ +typedef GRegisteredItemClass GScanMagicTypeFunctionClass; + + +/* Indique le type défini pour une reconnaissance de types de contenus. */ +GType g_scan_magic_type_function_get_type(void); + +/* Constitue une fonction d'identification de types de contenus. */ +GRegisteredItem *g_scan_magic_type_function_new(void); + + + +#endif /* _ANALYSIS_SCAN_ITEMS_MAGIC_TYPE_H */ |