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authorCyrille Bagard <nocbos@gmail.com>2024-02-20 08:11:17 (GMT)
committerCyrille Bagard <nocbos@gmail.com>2024-02-20 08:11:17 (GMT)
commit26f93f593542cc550107744e92f95e9516e7435e (patch)
tree058cf883324274965356beb42398c387c0e49217 /src/analysis
parent30e56f25772247d76c7775d32ccd5b5a0661d3bf (diff)
Share GObject instances between scan contexts and matches.
Diffstat (limited to 'src/analysis')
-rw-r--r--src/analysis/scan/context.c2
-rw-r--r--src/analysis/scan/matches-int.h8
-rw-r--r--src/analysis/scan/matches.c55
-rw-r--r--src/analysis/scan/matches.h6
-rw-r--r--src/analysis/scan/matches/bytes-int.h10
-rw-r--r--src/analysis/scan/matches/bytes.c98
-rw-r--r--src/analysis/scan/matches/bytes.h5
-rw-r--r--src/analysis/scan/patterns/token.c66
-rw-r--r--src/analysis/scan/patterns/token.h2
-rw-r--r--src/analysis/scan/rule.c26
10 files changed, 127 insertions, 151 deletions
diff --git a/src/analysis/scan/context.c b/src/analysis/scan/context.c
index 55311c4..fc4194b 100644
--- a/src/analysis/scan/context.c
+++ b/src/analysis/scan/context.c
@@ -430,6 +430,8 @@ void g_scan_context_register_full_matches(GScanContext *context, GSearchPattern
g_hash_table_insert(context->full_trackers, pattern, matches);
+ g_scan_matches_attach(matches, context, pattern);
+
}
diff --git a/src/analysis/scan/matches-int.h b/src/analysis/scan/matches-int.h
index 674fe03..4e6a244 100644
--- a/src/analysis/scan/matches-int.h
+++ b/src/analysis/scan/matches-int.h
@@ -44,7 +44,13 @@ struct _GScanMatches
{
GObject parent; /* A laisser en premier */
- GSearchPattern *source; /* Motif d'origine recherché */
+ /**
+ * L'aspect constant des instances marque seulement le fait que les
+ * pointeurs sont partagés avec un contexte, qui est le réel propriétaire
+ * de ces instances.
+ */
+ const GScanContext *context; /* Contexte de rattachement */
+ const GSearchPattern *source; /* Motif d'origine recherché */
};
diff --git a/src/analysis/scan/matches.c b/src/analysis/scan/matches.c
index 3dc15f9..d83114c 100644
--- a/src/analysis/scan/matches.c
+++ b/src/analysis/scan/matches.c
@@ -84,6 +84,7 @@ static void g_scan_matches_class_init(GScanMatchesClass *klass)
static void g_scan_matches_init(GScanMatches *matches)
{
+ matches->context = NULL;
matches->source = NULL;
}
@@ -103,7 +104,10 @@ static void g_scan_matches_init(GScanMatches *matches)
static void g_scan_matches_dispose(GScanMatches *matches)
{
- g_clear_object(&matches->source);
+ /**
+ * Contexte et source sont des instances partagées. Leur propriété n'est
+ * donc pas à modifier avec un appel à g_clear_object() ici.
+ */
G_OBJECT_CLASS(g_scan_matches_parent_class)->dispose(G_OBJECT(matches));
@@ -131,6 +135,53 @@ static void g_scan_matches_finalize(GScanMatches *matches)
/******************************************************************************
* *
+* Paramètres : matches = instance dont l'initialisation est à compléter. *
+* context = contexte associé au scan courant. *
+* source = lien vers le motif recherché d'origine. *
+* *
+* Description : Associe des éléments de contexte à des correspondances. *
+* *
+* Retour : - *
+* *
+* Remarques : Aucun transfert de propriété n'a lieu ici ! *
+* *
+******************************************************************************/
+
+void g_scan_matches_attach(GScanMatches *matches, const GScanContext *context, const GSearchPattern *source)
+{
+ matches->context = context;
+ matches->source = source;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : matches = informations de correspondances à consulter. *
+* *
+* Description : Fournit le contexte du scan associé aux correspondances. *
+* *
+* Retour : Contexte de scan courant. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+GScanContext *g_scan_bytes_matches_get_context(const GScanMatches *matches)
+{
+ GScanContext *result; /* Instance à retourner */
+
+ result = (GScanContext *)matches->context;
+
+ g_object_ref(G_OBJECT(result));
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
* Paramètres : matches = définition de correspondance à consulter. *
* *
* Description : Indique la source du motif d'origine recherché. *
@@ -145,7 +196,7 @@ GSearchPattern *g_scan_matches_get_source(const GScanMatches *matches)
{
GSearchPattern *result; /* Source à retourner */
- result = matches->source;
+ result = (GSearchPattern *)matches->source;
g_object_ref(G_OBJECT(result));
diff --git a/src/analysis/scan/matches.h b/src/analysis/scan/matches.h
index 345db96..26e54ed 100644
--- a/src/analysis/scan/matches.h
+++ b/src/analysis/scan/matches.h
@@ -51,6 +51,12 @@ typedef struct _GScanMatchesClass GScanMatchesClass;
/* Indique le type défini pour une série de correspondances identifiées. */
GType g_scan_matches_get_type(void);
+/* Associe des éléments de contexte à des correspondances. */
+void g_scan_matches_attach(GScanMatches *, const GScanContext *, const GSearchPattern *);
+
+/* Fournit le contexte du scan associé aux correspondances. */
+GScanContext *g_scan_bytes_matches_get_context(const GScanMatches *);
+
/* Indique la source du motif d'origine recherché. */
GSearchPattern *g_scan_matches_get_source(const GScanMatches *);
diff --git a/src/analysis/scan/matches/bytes-int.h b/src/analysis/scan/matches/bytes-int.h
index d356208..f6239e3 100644
--- a/src/analysis/scan/matches/bytes-int.h
+++ b/src/analysis/scan/matches/bytes-int.h
@@ -37,12 +37,6 @@ struct _GScanBytesMatches
{
GScanMatches parent; /* A laisser en premier */
- GScanContext *context; /* Contexte de rattachement */
-
- // TODO : if NDEBUG ?
- phys_t content_start; /* Point de début du contenu */
- phys_t content_end; /* Point de fin du contenu */
-
match_area_t *areas; /* Zones couvertes */
size_t count; /* Nombre de zones */
@@ -56,9 +50,5 @@ struct _GScanBytesMatchesClass
};
-/* Met en place une série de correspondances avec des octets. */
-bool g_scan_bytes_matches_create(GScanBytesMatches *, GSearchPattern *, GScanContext *);
-
-
#endif /* _ANALYSIS_SCAN_MATCHES_BYTES_INT_H */
diff --git a/src/analysis/scan/matches/bytes.c b/src/analysis/scan/matches/bytes.c
index c4c43bc..218121d 100644
--- a/src/analysis/scan/matches/bytes.c
+++ b/src/analysis/scan/matches/bytes.c
@@ -117,11 +117,6 @@ static void g_scan_bytes_matches_class_init(GScanBytesMatchesClass *klass)
static void g_scan_bytes_matches_init(GScanBytesMatches *matches)
{
- matches->context = NULL;
-
- matches->content_start = VMPA_NO_PHYSICAL;
- matches->content_end = VMPA_NO_PHYSICAL;
-
matches->areas = NULL;
matches->count = 0;
@@ -142,8 +137,6 @@ static void g_scan_bytes_matches_init(GScanBytesMatches *matches)
static void g_scan_bytes_matches_dispose(GScanBytesMatches *matches)
{
- //g_clear_object(&matches->context);
-
G_OBJECT_CLASS(g_scan_bytes_matches_parent_class)->dispose(G_OBJECT(matches));
}
@@ -170,8 +163,7 @@ static void g_scan_bytes_matches_finalize(GScanBytesMatches *matches)
/******************************************************************************
* *
-* Paramètres : source = lien vers le motif recherché d'origine. *
-* context = contexte associé au scan courant. *
+* Paramètres : - *
* *
* Description : Crée un suivi pour série de correspondances avec des octets. *
* *
@@ -181,87 +173,12 @@ static void g_scan_bytes_matches_finalize(GScanBytesMatches *matches)
* *
******************************************************************************/
-GScanMatches *g_scan_bytes_matches_new(GSearchPattern *source, GScanContext *context)
+GScanMatches *g_scan_bytes_matches_new(void)
{
GScanMatches *result; /* Structure à retourner */
result = g_object_new(G_TYPE_SCAN_BYTES_MATCHES, NULL);
- if (!g_scan_bytes_matches_create(G_SCAN_BYTES_MATCHES(result), source, context))
- g_clear_object(&result);
-
- return result;
-
-}
-
-
-/******************************************************************************
-* *
-* Paramètres : matches = instance à initialiser pleinement. *
-* source = lien vers le motif recherché d'origine. *
-* context = contexte associé au scan courant. *
-* *
-* Description : Met en place une série de correspondances avec des octets. *
-* *
-* Retour : Bilan de l'opération. *
-* *
-* Remarques : - *
-* *
-******************************************************************************/
-
-bool g_scan_bytes_matches_create(GScanBytesMatches *matches, GSearchPattern *source, GScanContext *context)
-{
- bool result; /* Bilan à retourner */
- GScanMatches *base; /* Lien vers les infos de base */
- GBinContent *content; /* Contenu à manipuler */
- vmpa2t start; /* Point de début du contenu */
- vmpa2t end; /* Point de fin du contenu */
-
- result = true;
-
- base = G_SCAN_MATCHES(matches);
-
- base->source = source;
- g_object_ref(G_OBJECT(source));
-
- matches->context = context;
- //g_object_ref(G_OBJECT(context));
-
- content = g_scan_context_get_content(context);
-
- g_binary_content_compute_start_pos(content, &start);
- g_binary_content_compute_end_pos(content, &end);
-
- matches->content_start = start.physical;
- matches->content_end = end.physical;
-
- g_object_unref(G_OBJECT(content));
-
- return result;
-
-}
-
-
-/******************************************************************************
-* *
-* Paramètres : matches = informations de correspondances à consulter. *
-* *
-* Description : Fournit le contexte du scan associé aux correspondances. *
-* *
-* Retour : Contexte de scan courant. *
-* *
-* Remarques : - *
-* *
-******************************************************************************/
-
-GScanContext *g_scan_bytes_matches_get_context(const GScanBytesMatches *matches)
-{
- GScanContext *result; /* Instance à retourner */
-
- result = matches->context;
-
- g_object_ref(G_OBJECT(result));
-
return result;
}
@@ -433,8 +350,8 @@ char *g_scan_bytes_matches_get_modifier_path(const GScanBytesMatches *matches)
static void g_scan_bytes_matches_output_to_text(const GScanBytesMatches *matches, int fd)
{
- GBinContent *content; /* Contenu binaire analysé */
GScanMatches *base; /* Lien vers les infos de base */
+ GBinContent *content; /* Contenu binaire analysé */
const char *name; /* Désignation du motif ciblé */
match_area_t *iter; /* Boucle de parcours #1 */
char value[2 + ULLONG_MAXLEN]; /* Impression de la position */
@@ -444,10 +361,10 @@ static void g_scan_bytes_matches_output_to_text(const GScanBytesMatches *matches
const bin_t *data; /* Accès aux données brutes */
phys_t k; /* Boucle de parcours #2 */
- content = g_scan_context_get_content(matches->context);
-
base = G_SCAN_MATCHES(matches);
+ content = g_scan_context_get_content(base->context);
+
name = g_search_pattern_get_name(base->source);
for_each_match_area(iter, matches->areas)
@@ -547,6 +464,7 @@ static void g_scan_bytes_matches_output_to_json(const GScanBytesMatches *matches
unsigned int i; /* Boucle de parcours #1 */
char value[4 + ULLONG_MAXLEN]; /* Impression de la position */
int ret; /* Bilan d'une conversion */
+ GScanMatches *base; /* Lien vers les infos de base */
GBinContent *content; /* Contenu binaire analysé */
match_area_t *iter; /* Boucle de parcours #1 */
vmpa2t pos; /* Tête de lecture */
@@ -581,7 +499,9 @@ static void g_scan_bytes_matches_output_to_json(const GScanBytesMatches *matches
write(fd, "\"matches\": [\n", 13);
- content = g_scan_context_get_content(matches->context);
+ base = G_SCAN_MATCHES(matches);
+
+ content = g_scan_context_get_content(base->context);
for_each_match_area(iter, matches->areas)
{
diff --git a/src/analysis/scan/matches/bytes.h b/src/analysis/scan/matches/bytes.h
index 9e046aa..50f60a4 100644
--- a/src/analysis/scan/matches/bytes.h
+++ b/src/analysis/scan/matches/bytes.h
@@ -56,10 +56,7 @@ typedef struct _GScanBytesMatchesClass GScanBytesMatchesClass;
GType g_scan_bytes_matches_get_type(void);
/* Crée un suivi pour série de correspondances avec des octets. */
-GScanMatches *g_scan_bytes_matches_new(GSearchPattern *, GScanContext *);
-
-/* Fournit le contexte du scan associé aux correspondances. */
-GScanContext *g_scan_bytes_matches_get_context(const GScanBytesMatches *);
+GScanMatches *g_scan_bytes_matches_new(void);
/* Intègre une liste de correspondances vérifiées. */
void g_scan_bytes_matches_set_list(GScanBytesMatches *, match_area_t *, size_t);
diff --git a/src/analysis/scan/patterns/token.c b/src/analysis/scan/patterns/token.c
index 76a5e66..b3c6d53 100644
--- a/src/analysis/scan/patterns/token.c
+++ b/src/analysis/scan/patterns/token.c
@@ -300,6 +300,7 @@ bool g_bytes_token_build_id(GBytesToken *token, GEngineBackend *backend)
* *
* Paramètres : token = définition de la bribe à manipuler. *
* matches = suivi des correspondances à consolider. *
+* params = paramètres des opérations de validation. *
* *
* Description : Transforme les correspondances locales en trouvailles. *
* *
@@ -309,83 +310,70 @@ bool g_bytes_token_build_id(GBytesToken *token, GEngineBackend *backend)
* *
******************************************************************************/
-void g_bytes_token_check(const GBytesToken *token, GScanBytesMatches *matches)
+void g_bytes_token_check(const GBytesToken *token, GScanBytesMatches *matches, scan_node_check_params_t *params)
{
- scan_node_check_params_t params; /* Rassemblement de paramètres */
- vmpa2t start; /* Point de début du contenu */
- vmpa2t end; /* Point de fin du contenu */
match_area_t *area; /* Correspondance à valider */
match_area_t *next; /* Correspondance suivante */
vmpa2t pos; /* Tête de lecture */
const bin_t *byte; /* Octet à valider */
- /* Définition d'un contexte */
+ /* Réinitialisation */
- params.context = g_scan_bytes_matches_get_context(matches);
- params.content = g_scan_context_get_content(params.context);
- params.allocator = g_umem_slice_new(sizeof(match_area_t));
+ // TODO: offset
- g_binary_content_compute_start_pos(params.content, &start);
- g_binary_content_compute_end_pos(params.content, &end);
+ params->initialized = false;
- params.content_start = start.physical;
- params.content_end = end.physical;
+ params->main_areas = NULL;
+ params->main_count = 0;
- // offset
+ params->created_areas = NULL;
+ params->created_count = 0;
- params.initialized = false;
-
- params.main_areas = NULL;
- params.main_count = 0;
-
- params.created_areas = NULL;
- params.created_count = 0;
-
- params.kept_areas = NULL;
- params.kept_count = 0;
+ params->kept_areas = NULL;
+ params->kept_count = 0;
/* Lancement des analyses */
- g_scan_token_node_check_forward(token->root, &params);
+ g_scan_token_node_check_forward(token->root, params);
if (token->need_backward)
- g_scan_token_node_check_backward(token->root, &params);
+ g_scan_token_node_check_backward(token->root, params);
// REMME ? sort_and_filter_pending_matches(matches);
if (token->fullword)
{
- for_each_match_area_safe(area, &params.main_areas, next)
+ for_each_match_area_safe(area, &params->main_areas, next)
{
/* Validation de l'octet précédent, s'il existe */
- if (area->start > params.content_start)
+ if (area->start > params->content_start)
{
init_vmpa(&pos, area->start - 1, VMPA_NO_VIRTUAL);
- byte = g_binary_content_get_raw_access(params.content, &pos, 1);
+ byte = g_binary_content_get_raw_access(params->content, &pos, 1);
if (isalnum(*byte))
{
- del_match_area(area, &params.main_areas);
- assert(&params.main_count > 0);
- params.main_count--;
+ del_match_area(area, &params->main_areas);
+ assert(&params->main_count > 0);
+ params->main_count--;
continue;
}
}
/* Validation de l'octet suivant, s'il existe */
- if (area->end < params.content_end)
+ if (area->end < params->content_end)
{
init_vmpa(&pos, area->end, VMPA_NO_VIRTUAL);
- byte = g_binary_content_get_raw_access(params.content, &pos, 1);
+ byte = g_binary_content_get_raw_access(params->content, &pos, 1);
if (isalnum(*byte))
{
- del_match_area(area, &params.main_areas);
- assert(&params.main_count > 0);
- params.main_count--;
+ del_match_area(area, &params->main_areas);
+ assert(&params->main_count > 0);
+ params->main_count--;
continue;
}
@@ -395,11 +383,7 @@ void g_bytes_token_check(const GBytesToken *token, GScanBytesMatches *matches)
}
- g_scan_bytes_matches_set_list(matches, params.main_areas, params.main_count);
-
- g_object_unref(G_OBJECT(params.context));
- g_object_unref(G_OBJECT(params.content));
- //g_object_unref(G_OBJECT(params.allocator));
+ g_scan_bytes_matches_set_list(matches, params->main_areas, params->main_count);
}
diff --git a/src/analysis/scan/patterns/token.h b/src/analysis/scan/patterns/token.h
index 3bc5cb7..f5b78f6 100644
--- a/src/analysis/scan/patterns/token.h
+++ b/src/analysis/scan/patterns/token.h
@@ -65,7 +65,7 @@ bool g_bytes_token_enroll(GBytesToken *, GEngineBackend *, size_t);
bool g_bytes_token_build_id(GBytesToken *, GEngineBackend *);
/* Transforme les correspondances locales en trouvailles. */
-void g_bytes_token_check(const GBytesToken *, GScanBytesMatches *);
+void g_bytes_token_check(const GBytesToken *, GScanBytesMatches *, scan_node_check_params_t *);
/* Retrouve l'origine d'une correspondance à partir d'un indice. */
char *g_bytes_token_get_modifier_path(const GBytesToken *, size_t);
diff --git a/src/analysis/scan/rule.c b/src/analysis/scan/rule.c
index 14a6d38..05fc657 100644
--- a/src/analysis/scan/rule.c
+++ b/src/analysis/scan/rule.c
@@ -613,17 +613,34 @@ bool g_scan_rule_define_pattern_ids(GScanRule *rule, GEngineBackend *backend)
void g_scan_rule_check(GScanRule *rule, GEngineBackend *backend, GScanContext *context)
{
+ scan_node_check_params_t params; /* Rassemblement de paramètres */
+ vmpa2t start; /* Point de début du contenu */
+ vmpa2t end; /* Point de fin du contenu */
size_t i; /* Boucle de parcours */
GSearchPattern *pattern; /* Motif à intégrer */
- GScanBytesMatches *matches; /* Correspondances établies */
+ GScanMatches *matches; /* Correspondances établies */
+
+ /* Définition d'un contexte */
+
+ params.context = context;
+ params.content = g_scan_context_get_content(context);
+ params.allocator = g_umem_slice_new(sizeof(match_area_t));
+
+ g_binary_content_compute_start_pos(params.content, &start);
+ g_binary_content_compute_end_pos(params.content, &end);
+
+ params.content_start = start.physical;
+ params.content_end = end.physical;
+
+ /* Vérifications */
for (i = 0; i < rule->bytes_used; i++)
{
pattern = rule->bytes_locals[i];
- matches = g_scan_bytes_matches_new(pattern, context);
+ matches = g_scan_bytes_matches_new();
- g_bytes_token_check(G_BYTES_TOKEN(pattern), matches);
+ g_bytes_token_check(G_BYTES_TOKEN(pattern), G_SCAN_BYTES_MATCHES(matches), &params);
g_scan_context_register_full_matches(context, pattern, matches);
@@ -631,6 +648,9 @@ void g_scan_rule_check(GScanRule *rule, GEngineBackend *backend, GScanContext *c
}
+ g_object_unref(G_OBJECT(params.content));
+ //g_object_unref(G_OBJECT(params.allocator));
+
}