diff options
Diffstat (limited to 'plugins/pychrysalide/analysis/scan')
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/Makefile.am | 3 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/context.c | 89 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/expr.c | 2 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/Makefile.am | 15 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/constants.c | 128 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/constants.h | 42 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/literal.c | 281 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/literal.h | 45 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/module.c | 103 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/exprs/module.h | 42 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/item.c | 413 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/module.c | 3 |
12 files changed, 1153 insertions, 13 deletions
diff --git a/plugins/pychrysalide/analysis/scan/Makefile.am b/plugins/pychrysalide/analysis/scan/Makefile.am index 0b20ca5..8c9fb77 100644 --- a/plugins/pychrysalide/analysis/scan/Makefile.am +++ b/plugins/pychrysalide/analysis/scan/Makefile.am @@ -13,6 +13,7 @@ libpychrysaanalysisscan_la_SOURCES = \ space.h space.c libpychrysaanalysisscan_la_LIBADD = \ + exprs/libpychrysaanalysisscanexprs.la \ patterns/libpychrysaanalysisscanpatterns.la libpychrysaanalysisscan_la_CFLAGS = $(LIBPYTHON_INTERPRETER_CFLAGS) $(LIBPYGOBJECT_CFLAGS) $(TOOLKIT_CFLAGS) \ @@ -24,4 +25,4 @@ devdir = $(includedir)/chrysalide/$(subdir) dev_HEADERS = $(libpychrysaanalysisscan_la_SOURCES:%c=) -SUBDIRS = patterns +SUBDIRS = exprs patterns diff --git a/plugins/pychrysalide/analysis/scan/context.c b/plugins/pychrysalide/analysis/scan/context.c index 8f29457..7071935 100644 --- a/plugins/pychrysalide/analysis/scan/context.c +++ b/plugins/pychrysalide/analysis/scan/context.c @@ -32,10 +32,11 @@ #include <analysis/content.h> #include <analysis/scan/context-int.h> #include <analysis/scan/expr.h> -#include <plugins/pychrysalide/access.h> -#include <plugins/pychrysalide/helpers.h> -#include <plugins/pychrysalide/analysis/content.h> -#include <plugins/pychrysalide/analysis/scan/expr.h> + +#include "expr.h" +#include "../content.h" +#include "../../access.h" +#include "../../helpers.h" @@ -50,6 +51,12 @@ static PyObject *py_scan_context_mark_scan_as_done(PyObject *, PyObject *); /* Indique si une correspondance globale a pu être établie. */ static PyObject *py_scan_context_has_match_for_rule(PyObject *, PyObject *); +/* Fournit une référence au contenu principal analysé. */ +static PyObject *py_scan_context_get_content(PyObject *, void *); + +/* Définit le contenu principal à analyser. */ +static int py_scan_context_set_content(PyObject *, PyObject *, void *); + /* Indique si la phase d'analyse de contenu est terminée. */ static PyObject *py_scan_context_is_scan_done(PyObject *, void *); @@ -183,6 +190,79 @@ static PyObject *py_scan_context_has_match_for_rule(PyObject *self, PyObject *ar /****************************************************************************** * * +* Paramètres : self = classe représentant une routine binaire. * +* closure = adresse non utilisée ici. * +* * +* Description : Fournit une référence au contenu principal analysé. * +* * +* Retour : Content binaire associé au context. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_scan_context_get_content(PyObject *self, void *closure) +{ + PyObject *result; /* Eléments à retourner */ + GScanContext *context; /* Version native */ + GBinContent *content; /* Contenu binaire à référencer*/ + +#define SCAN_CONTEXT_CONTENT_ATTRIB PYTHON_GETSET_DEF_FULL \ +( \ + content, py_scan_context, \ + "Link to the scanned binary content.\n" \ + "\n" \ + "The result is a pychrysalide.analysis.BinContent for" \ + " fully initialized context." \ +) + + context = G_SCAN_CONTEXT(pygobject_get(self)); + content = g_scan_context_get_content(context); + + result = pygobject_new(G_OBJECT(content)); + + g_object_unref(G_OBJECT(content)); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = objet Python concerné par l'appel. * +* value = valeur fournie à intégrer ou prendre en compte. * +* closure = non utilisé ici. * +* * +* Description : Définit le contenu principal à analyser. * +* * +* Retour : Content binaire associé au context. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static int py_scan_context_set_content(PyObject *self, PyObject *value, void *closure) +{ + GScanContext *context; /* Elément à consulter */ + int ret; /* Bilan de lecture des args. */ + GBinContent *content; /* Contenu binaire à référencer*/ + + ret = PyObject_IsInstance(value, (PyObject *)get_python_binary_content_type()); + if (!ret) return -1; + + context = G_SCAN_CONTEXT(pygobject_get(self)); + content = G_BIN_CONTENT(pygobject_get(value)); + + g_scan_context_set_content(context, content); + + return 0; + +} + + +/****************************************************************************** +* * * Paramètres : self = objet Python concerné par l'appel. * * closure = non utilisé ici. * * * @@ -242,6 +322,7 @@ PyTypeObject *get_python_scan_context_type(void) }; static PyGetSetDef py_scan_context_getseters[] = { + SCAN_CONTEXT_CONTENT_ATTRIB, SCAN_CONTEXT_IS_SCAN_DONE_ATTRIB, { NULL } }; diff --git a/plugins/pychrysalide/analysis/scan/expr.c b/plugins/pychrysalide/analysis/scan/expr.c index 3622e9b..2d8245a 100644 --- a/plugins/pychrysalide/analysis/scan/expr.c +++ b/plugins/pychrysalide/analysis/scan/expr.c @@ -107,7 +107,7 @@ static int py_scan_expression_init(PyObject *self, PyObject *args, PyObject *kwd " the following arguments as keyword parameters:\n" \ "* *state*: initial state of reduction for the expression, as a" \ " pychrysalide.analysis.scan.ScanExpression.ScanReductionState" \ - " value." \ + " value." \ "\n" \ "The following methods have to be defined for new classes:\n" \ "* pychrysalide.analysis.scan.ScanExpression._cmp_rich().\n" diff --git a/plugins/pychrysalide/analysis/scan/exprs/Makefile.am b/plugins/pychrysalide/analysis/scan/exprs/Makefile.am new file mode 100644 index 0000000..e40d4de --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/Makefile.am @@ -0,0 +1,15 @@ + +noinst_LTLIBRARIES = libpychrysaanalysisscanexprs.la + +libpychrysaanalysisscanexprs_la_SOURCES = \ + constants.h constants.c \ + literal.h literal.c \ + module.h module.c + +libpychrysaanalysisscanexprs_la_CFLAGS = $(LIBPYTHON_INTERPRETER_CFLAGS) $(LIBPYGOBJECT_CFLAGS) \ + $(TOOLKIT_CFLAGS) -I$(top_srcdir)/src -DNO_IMPORT_PYGOBJECT + + +devdir = $(includedir)/chrysalide/$(subdir) + +dev_HEADERS = $(libpychrysaanalysisscanexprs_la_SOURCES:%c=) diff --git a/plugins/pychrysalide/analysis/scan/exprs/constants.c b/plugins/pychrysalide/analysis/scan/exprs/constants.c new file mode 100644 index 0000000..b11ac4c --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/constants.c @@ -0,0 +1,128 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * constants.c - ajout des constantes de base pour les expressions + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include "constants.h" + + +#include <analysis/scan/exprs/literal.h> + + +#include "../../../helpers.h" + + + +/****************************************************************************** +* * +* Paramètres : type = type dont le dictionnaire est à compléter. * +* * +* Description : Définit les constantes relatives aux expressions de scan. * +* * +* Retour : true en cas de succès de l'opération, false sinon. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool define_literal_expression_value_type_constants(PyTypeObject *type) +{ + bool result; /* Bilan à retourner */ + PyObject *values; /* Groupe de valeurs à établir */ + + values = PyDict_New(); + + result = add_const_to_group(values, "LVT_BOOLEAN", LVT_BOOLEAN); + if (result) result = add_const_to_group(values, "SIGNED_INTEGER", LVT_SIGNED_INTEGER); + if (result) result = add_const_to_group(values, "UNSIGNED_INTEGER", LVT_UNSIGNED_INTEGER); + if (result) result = add_const_to_group(values, "STRING", LVT_STRING); + + if (!result) + { + Py_DECREF(values); + goto exit; + } + + result = attach_constants_group_to_type(type, false, "LiteralValueType", values, + "Type of value carried by a literal scan expression."); + + exit: + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : arg = argument quelconque à tenter de convertir. * +* dst = destination des valeurs récupérées en cas de succès. * +* * +* Description : Tente de convertir en constante LiteralValueType. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_literal_expression_value_type(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + unsigned long value; /* Valeur transcrite */ + + result = PyObject_IsInstance(arg, (PyObject *)&PyLong_Type); + + switch (result) + { + case -1: + /* L'exception est déjà fixée par Python */ + result = 0; + break; + + case 0: + PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to LiteralValueType"); + break; + + case 1: + value = PyLong_AsUnsignedLong(arg); + + if (value > LVT_REG_EXPR) + { + PyErr_SetString(PyExc_TypeError, "invalid value for LiteralValueType"); + result = 0; + } + + else + *((LiteralValueType *)dst) = value; + + break; + + default: + assert(false); + break; + + } + + return result; + +} diff --git a/plugins/pychrysalide/analysis/scan/exprs/constants.h b/plugins/pychrysalide/analysis/scan/exprs/constants.h new file mode 100644 index 0000000..e5b8e8c --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/constants.h @@ -0,0 +1,42 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * constants.h - prototypes pour l'ajout des constantes de base pour les expressions + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#ifndef _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_CONSTANTS_H +#define _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_CONSTANTS_H + + +#include <Python.h> +#include <stdbool.h> + + + +/* Définit les constantes relatives aux expressions litérales. */ +bool define_literal_expression_value_type_constants(PyTypeObject *); + +/* Tente de convertir en constante LiteralValueType. */ +int convert_to_literal_expression_value_type(PyObject *, void *); + + + +#endif /* _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_CONSTANTS_H */ diff --git a/plugins/pychrysalide/analysis/scan/exprs/literal.c b/plugins/pychrysalide/analysis/scan/exprs/literal.c new file mode 100644 index 0000000..d7ae002 --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/literal.c @@ -0,0 +1,281 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * literal.c - équivalent Python du fichier "analysis/scan/exprs/literal.c" + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include "literal.h" + + +#include <pygobject.h> + + +#include <i18n.h> +#include <analysis/scan/exprs/literal-int.h> + + +#include "constants.h" +#include "../expr.h" +#include "../../../access.h" +#include "../../../helpers.h" + + + +CREATE_DYN_CONSTRUCTOR(scan_literal_expression, G_TYPE_SCAN_LITERAL_EXPRESSION); + +/* Initialise une instance sur la base du dérivé de GObject. */ +static int py_scan_literal_expression_init(PyObject *, PyObject *, PyObject *); + + + +/****************************************************************************** +* * +* Paramètres : self = objet à initialiser (théoriquement). * +* args = arguments fournis à l'appel. * +* kwds = arguments de type key=val fournis. * +* * +* Description : Initialise une instance sur la base du dérivé de GObject. * +* * +* Retour : 0. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static int py_scan_literal_expression_init(PyObject *self, PyObject *args, PyObject *kwds) +{ + PyObject *py_value; /* Valeur en version Python */ + int ret; /* Bilan de lecture des args. */ + LiteralValueType vtype; /* Valeur à porter */ + bool arg_boolean; /* Argument natif booléen */ + unsigned long long arg_uinteger; /* Argument natif entier */ + sized_string_t arg_string; /* Argument natif textuel */ + Py_ssize_t arg_str_length; /* Taille de ce texte */ + void *arg_ptr; /* Pointeur vers un argument */ + GScanLiteralExpression *expr; /* Création GLib à transmettre */ + +#define SCAN_LITERAL_EXPRESSION_DOC \ + "A ScanLiteralExpression object defines expression carrying" \ + " literal values available for scan match conditions.\n" \ + "\n" \ + "Instances can be created using one of the following" \ + " constructors:\n" \ + "\n" \ + " ScanLiteralExpression(value)" \ + "\n" \ + "\n" \ + "Where *value* is either a boolean, an integer or bytes." + + /* Récupération des paramètres */ + + ret = PyArg_ParseTuple(args, "O", &py_value); + if (!ret) return -1; + + if (PyBool_Check(py_value)) + { + vtype = LVT_BOOLEAN; + + arg_boolean = (py_value == Py_True); + arg_ptr = &arg_boolean; + + } + + else if (PyLong_Check(py_value)) + { + if (1 /* sign - TODO */) + ; + + vtype = LVT_UNSIGNED_INTEGER; + + arg_uinteger = PyLong_AsUnsignedLongLong(py_value); + arg_ptr = &arg_uinteger; + + } + + else if (PyBytes_Check(py_value)) + { + vtype = LVT_STRING; + + ret = PyBytes_AsStringAndSize(py_value, &arg_string.data, &arg_str_length); + if (ret == -1) return -1; + + arg_string.len = arg_str_length; + arg_ptr = &arg_string; + + } + + else + { + PyErr_SetString(PyExc_ValueError, _("Unsupported Python value for a literal scan expression.")); + return -1; + } + + /* Initialisation d'un objet GLib */ + + ret = forward_pygobjet_init(self); + if (ret == -1) return -1; + + /* Eléments de base */ + + expr = G_SCAN_LITERAL_EXPRESSION(pygobject_get(self)); + + if (!g_scan_literal_expression_create(expr, vtype, arg_ptr)) + { + PyErr_SetString(PyExc_ValueError, _("Unable to create literal expression.")); + return -1; + } + + return 0; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Fournit un accès à une définition de type à diffuser. * +* * +* Retour : Définition d'objet pour Python. * +* * +* Remarques : - * +* * +******************************************************************************/ + +PyTypeObject *get_python_scan_literal_expression_type(void) +{ + static PyMethodDef py_scan_literal_expression_methods[] = { + { NULL } + }; + + static PyGetSetDef py_scan_literal_expression_getseters[] = { + { NULL } + }; + + static PyTypeObject py_scan_literal_expression_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.analysis.scan.exprs.ScanLiteralExpression", + .tp_basicsize = sizeof(PyGObject), + + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + + .tp_doc = SCAN_LITERAL_EXPRESSION_DOC, + + .tp_methods = py_scan_literal_expression_methods, + .tp_getset = py_scan_literal_expression_getseters, + + .tp_init = py_scan_literal_expression_init, + .tp_new = py_scan_literal_expression_new, + + }; + + return &py_scan_literal_expression_type; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Prend en charge l'objet 'pychrysalide....PlainModifier'. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool ensure_python_scan_literal_expression_is_registered(void) +{ + PyTypeObject *type; /* Type Python 'PlainModifier' */ + PyObject *module; /* Module à recompléter */ + PyObject *dict; /* Dictionnaire du module */ + + type = get_python_scan_literal_expression_type(); + + if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) + { + module = get_access_to_python_module("pychrysalide.analysis.scan.exprs"); + + dict = PyModule_GetDict(module); + + if (!ensure_python_scan_expression_is_registered()) + return false; + + if (!register_class_for_pygobject(dict, G_TYPE_SCAN_LITERAL_EXPRESSION, type)) + return false; + + if (!define_literal_expression_value_type_constants(type)) + return false; + + } + + return true; + +} + + +/****************************************************************************** +* * +* Paramètres : arg = argument quelconque à tenter de convertir. * +* dst = destination des valeurs récupérées en cas de succès. * +* * +* Description : Tente de convertir en transmission d'octets à l'identique. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_scan_literal_expression(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + + result = PyObject_IsInstance(arg, (PyObject *)get_python_scan_literal_expression_type()); + + switch (result) + { + case -1: + /* L'exception est déjà fixée par Python */ + result = 0; + break; + + case 0: + PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to scan literal expression"); + break; + + case 1: + *((GScanLiteralExpression **)dst) = G_SCAN_LITERAL_EXPRESSION(pygobject_get(arg)); + break; + + default: + assert(false); + break; + + } + + return result; + +} diff --git a/plugins/pychrysalide/analysis/scan/exprs/literal.h b/plugins/pychrysalide/analysis/scan/exprs/literal.h new file mode 100644 index 0000000..8e7ea70 --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/literal.h @@ -0,0 +1,45 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * literal.h - équivalent Python du fichier "analysis/scan/exprs/literal.h" + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#ifndef _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_LITERAL_H +#define _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_LITERAL_H + + +#include <Python.h> +#include <stdbool.h> + + + +/* Fournit un accès à une définition de type à diffuser. */ +PyTypeObject *get_python_scan_literal_expression_type(void); + +/* Prend en charge l'objet 'pychrysalide.analysis.scan.exprs.ScanLiteralExpression'. */ +bool ensure_python_scan_literal_expression_is_registered(void); + +/* Tente de convertir en transmission d'octets à l'identique. */ +int convert_to_scan_literal_expression(PyObject *, void *); + + + +#endif /* _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_LITERAL_H */ diff --git a/plugins/pychrysalide/analysis/scan/exprs/module.c b/plugins/pychrysalide/analysis/scan/exprs/module.c new file mode 100644 index 0000000..4f38430 --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/module.c @@ -0,0 +1,103 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.c - intégration du répertoire exprs en tant que module + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include "module.h" + + +#include <assert.h> + + +#include "literal.h" +#include "../../../helpers.h" + + + +/****************************************************************************** +* * +* Paramètres : super = module dont la définition est à compléter. * +* * +* Description : Ajoute le module 'analysis....modifiers' à un module Python. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool add_analysis_scan_exprs_module(PyObject *super) +{ + bool result; /* Bilan à retourner */ + PyObject *module; /* Sous-module mis en place */ + +#define PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_MODULE_DOC \ + "This module provide expressions used to build a match condition." + + static PyModuleDef py_chrysalide_analysis_scan_exprs_module = { + + .m_base = PyModuleDef_HEAD_INIT, + + .m_name = "pychrysalide.analysis.scan.exprs", + .m_doc = PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_MODULE_DOC, + + .m_size = -1, + + }; + + module = build_python_module(super, &py_chrysalide_analysis_scan_exprs_module); + + result = (module != NULL); + + if (!result) + Py_XDECREF(module); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Intègre les objets du module 'analysis...patterns.modifiers'.* +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool populate_analysis_scan_exprs_module(void) +{ + bool result; /* Bilan à retourner */ + + result = true; + + if (result) result = ensure_python_scan_literal_expression_is_registered(); + + assert(result); + + return result; + +} diff --git a/plugins/pychrysalide/analysis/scan/exprs/module.h b/plugins/pychrysalide/analysis/scan/exprs/module.h new file mode 100644 index 0000000..ee4b8ab --- /dev/null +++ b/plugins/pychrysalide/analysis/scan/exprs/module.h @@ -0,0 +1,42 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.h - prototypes pour l'intégration du répertoire exprs en tant que module + * + * 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#ifndef _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_MODULE_H +#define _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_MODULE_H + + +#include <Python.h> +#include <stdbool.h> + + + +/* Ajoute le module 'analysis.scan.exprs' à un module Python. */ +bool add_analysis_scan_exprs_module(PyObject *); + +/* Intègre les objets du module 'analysis.scan.exprs'. */ +bool populate_analysis_scan_exprs_module(void); + + + +#endif /* _PLUGINS_PYCHRYSALIDE_ANALYSIS_SCAN_EXPRS_MODULE_H */ diff --git a/plugins/pychrysalide/analysis/scan/item.c b/plugins/pychrysalide/analysis/scan/item.c index 959694e..3f46067 100644 --- a/plugins/pychrysalide/analysis/scan/item.c +++ b/plugins/pychrysalide/analysis/scan/item.c @@ -38,14 +38,68 @@ -CREATE_DYN_CONSTRUCTOR(registered_item, G_TYPE_REGISTERED_ITEM); +/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ + + +/* Initialise la classe des éléments appelables enregistrés. */ +static void py_registered_item_init_gclass(GRegisteredItemClass *, gpointer); + +CREATE_DYN_ABSTRACT_CONSTRUCTOR(registered_item, G_TYPE_REGISTERED_ITEM, py_registered_item_init_gclass); /* Initialise une instance sur la base du dérivé de GObject. */ static int py_registered_item_init(PyObject *, PyObject *, PyObject *); +/* Indique le nom associé à une expression d'évaluation. */ +static char *py_registered_item_get_name_wrapper(const GRegisteredItem *); + +/* Lance une résolution d'élément à solliciter. */ +static bool py_registered_item_resolve_wrapper(GRegisteredItem *, const char *, GScanContext *, GScanScope *, GRegisteredItem **); + +/* Réduit une expression à une forme plus simple. */ +static bool py_registered_item_reduce_wrapper(GRegisteredItem *, GScanContext *, GScanScope *, GScanExpression **); + +/* Effectue un appel à une fonction enregistrée. */ +static bool py_registered_item_run_call_wrapper(GRegisteredItem *, GScanExpression **, size_t, GScanContext *, GScanScope *, GObject **); + + + +/* ------------------------- CONNEXION AVEC L'API DE PYTHON ------------------------- */ + + /* Lance une résolution d'élément à appeler. */ static PyObject *py_registered_item_resolve(PyObject *, PyObject *); +/* Fournit le désignation associée à un composant nommé. */ +static PyObject *py_registered_item_get_name(PyObject *, void *); + + + +/* ---------------------------------------------------------------------------------- */ +/* GLUE POUR CREATION DEPUIS PYTHON */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : class = classe à initialiser. * +* unused = données non utilisées ici. * +* * +* Description : Initialise la classe des éléments appelables enregistrés. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void py_registered_item_init_gclass(GRegisteredItemClass *class, gpointer unused) +{ + class->get_name = py_registered_item_get_name_wrapper; + class->resolve = py_registered_item_resolve_wrapper; + class->reduce = py_registered_item_reduce_wrapper; + class->run_call = py_registered_item_run_call_wrapper; + +} /****************************************************************************** @@ -66,13 +120,22 @@ static int py_registered_item_init(PyObject *self, PyObject *args, PyObject *kwd { int ret; /* Bilan de lecture des args. */ -#define REGISTERED_ITEM_DOC \ - "The *RegisteredItem* class defines the basics for evaluation" \ - " items involved into content scanning.\n" \ +#define REGISTERED_ITEM_DOC \ + "The *RegisteredItem* class is an abstract definition which is" \ + " the base for all keywords involved in a match condition" \ + " expression.\n" \ + "\n" \ + "Calls to the *__init__* constructor of this abstract object" \ + " expect no particular argument.\n" \ "\n" \ - "Instances can be created using the following constructor:\n" \ + "The following methods have to be defined for new classes:\n" \ + "* pychrysalide.analysis.scan.RegisteredItem._resolve();\n" \ + "* pychrysalide.analysis.scan.RegisteredItem._reduce();\n" \ + "* pychrysalide.analysis.scan.RegisteredItem._call().\n" \ "\n" \ - " RegisteredItem()" + "One item has to be defined as class attributes in the final" \ + " class:\n" \ + "* pychrysalide.analysis.scan.RegisteredItem._name.\n" /* Initialisation d'un objet GLib */ @@ -86,6 +149,338 @@ static int py_registered_item_init(PyObject *self, PyObject *args, PyObject *kwd /****************************************************************************** * * +* 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 *py_registered_item_get_name_wrapper(const GRegisteredItem *item) +{ + char *result; /* Désignation à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *pyname; /* Nom en objet Python */ + int ret; /* Bilan d'une conversion */ + +#define REGISTERED_ITEM_NAME_ATTRIB_WRAPPER PYTHON_GETTER_WRAPPER_DEF \ +( \ + _name, \ + "Provide the keyword of the expression item to be evaluated.\n" \ + "\n" \ + "The result has to be a string." \ +) + + result = NULL; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(item)); + + if (PyObject_HasAttrString(pyobj, "_name")) + { + pyname = PyObject_GetAttrString(pyobj, "_name"); + + if (pyname != NULL) + { + ret = PyUnicode_Check(pyname); + + if (ret) + result = strdup(PyUnicode_AsUTF8(pyname)); + + Py_DECREF(pyname); + + } + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* target = désignation de l'objet d'appel à identifier. * +* ctx = contexte de suivi de l'analyse courante. * +* scope = portée courante des variables locales. * +* out = zone d'enregistrement de la résolution opérée. [OUT]* +* * +* Description : Lance une résolution d'élément à solliciter. * +* * +* Retour : Bilan de l'opération : false en cas d'erreur irrécupérable. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_registered_item_resolve_wrapper(GRegisteredItem *item, const char *target, GScanContext *ctx, GScanScope *scope, GRegisteredItem **out) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *args; /* Arguments pour l'appel */ + PyObject *pyret; /* Bilan de consultation */ + GObject *gobj_ret; /* Bilan natif de consultation */ + +#define REGISTERED_ITEM_RESOLVE_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _cmp_rich, "$self, target, ctx, scope, /", \ + METH_VARARGS, \ + "Abstract method used to resolve an item by name.\n" \ + "\n" \ + "The *target* argument provide the name of the searched item;" \ + " *ctx* is a pychrysalide.analysis.scan.ScanContext instance" \ + " providing information about the current state; *scope* is a" \ + " pychrysalide.analysis.scan.ScanScope offering a view on the" \ + " current namespace for variables.\n" \ + "\n" \ + "The result has to be a pychrysalide.analysis.scan.RegisteredItem" \ + " instance on success, or *None* in case of failure." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(item)); + + if (has_python_method(pyobj, "_resolve")) + { + args = PyTuple_New(3); + PyTuple_SetItem(args, 0, PyUnicode_FromString(target)); + PyTuple_SetItem(args, 1, pygobject_new(G_OBJECT(ctx))); + PyTuple_SetItem(args, 2, pygobject_new(G_OBJECT(scope))); + + pyret = run_python_method(pyobj, "_resolve", args); + + if (pyret != NULL) + { + gobj_ret = pygobject_get(pyret); + + if (G_IS_REGISTERED_ITEM(gobj_ret)) + { + *out = G_REGISTERED_ITEM(gobj_ret); + + g_object_ref(G_OBJECT(*out)); + result = true; + + } + + Py_DECREF(pyret); + + } + + Py_DECREF(args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : item = élément d'appel à consulter. * +* ctx = contexte de suivi de l'analyse courante. * +* scope = portée courante des variables locales. * +* out = zone d'enregistrement de la réduction opérée. [OUT] * +* * +* Description : Réduit une expression à une forme plus simple. * +* * +* Retour : Bilan de l'opération : false en cas d'erreur irrécupérable. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_registered_item_reduce_wrapper(GRegisteredItem *item, GScanContext *ctx, GScanScope *scope, GScanExpression **out) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *args; /* Arguments pour l'appel */ + PyObject *pyret; /* Bilan de consultation */ + GObject *gobj_ret; /* Bilan natif de consultation */ + +#define REGISTERED_ITEM_REDUCE_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _cmp_rich, "$self, ctx, scope, /", \ + METH_VARARGS, \ + "Abstract method used to replace the item by an equivalent reduced" \ + " value.\n" \ + "\n" \ + "The *ctx* argument is a pychrysalide.analysis.scan.ScanContext" \ + " instance providing information about the current state; *scope*" \ + " is a pychrysalide.analysis.scan.ScanScope offering a view on the" \ + " current namespace for variables.\n" \ + "\n" \ + "The result has to be a pychrysalide.analysis.scan.ScanExpression" \ + " instance on success, or *None* in case of failure." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(item)); + + if (has_python_method(pyobj, "_reduce")) + { + args = PyTuple_New(2); + PyTuple_SetItem(args, 0, pygobject_new(G_OBJECT(ctx))); + PyTuple_SetItem(args, 1, pygobject_new(G_OBJECT(scope))); + + pyret = run_python_method(pyobj, "_reduce", args); + + if (pyret != NULL) + { + gobj_ret = pygobject_get(pyret); + + if (G_IS_SCAN_EXPRESSION(gobj_ret)) + { + *out = G_SCAN_EXPRESSION(gobj_ret); + + g_object_ref(G_OBJECT(*out)); + result = true; + + } + + Py_DECREF(pyret); + + } + + Py_DECREF(args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + 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 : Effectue un appel à une fonction enregistrée. * +* * +* Retour : Bilan de l'opération : false en cas d'erreur irrécupérable. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_registered_item_run_call_wrapper(GRegisteredItem *item, GScanExpression **args, size_t count, GScanContext *ctx, GScanScope *scope, GObject **out) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *sub_args; /* Sous-arguments pour l'appel */ + size_t i; /* Boucle de parcours */ + PyObject *py_args; /* Arguments pour l'appel */ + PyObject *pyret; /* Bilan de consultation */ + GObject *gobj_ret; /* Bilan natif de consultation */ + +#define REGISTERED_ITEM_CALL_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _cmp_rich, "$self, args, ctx, scope, /", \ + METH_VARARGS, \ + "Abstract method used to replace the item and its arguments by an" \ + " equivalent reduced value.\n" \ + "\n" \ + "The *args* argument is a tuple of already reduced" \ + " pychrysalide.analysis.scan.ScanExpression objects; ctx* argument" \ + " is a pychrysalide.analysis.scan.ScanContext instance providing" \ + " information about the current state; *scope* is a" \ + " pychrysalide.analysis.scan.ScanScope offering a view on the" \ + " current namespace for variables.\n" \ + "\n" \ + "The result has to be a pychrysalide.analysis.scan.ScanExpression" \ + " instance on success, or *None* in case of failure." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(item)); + + if (has_python_method(pyobj, "_call")) + { + sub_args = PyTuple_New(count); + + for (i = 0; i < count; i++) + PyTuple_SetItem(sub_args, 1, pygobject_new(G_OBJECT(args[i]))); + + py_args = PyTuple_New(3); + PyTuple_SetItem(py_args, 0, sub_args); + PyTuple_SetItem(py_args, 1, pygobject_new(G_OBJECT(ctx))); + PyTuple_SetItem(py_args, 2, pygobject_new(G_OBJECT(scope))); + + pyret = run_python_method(pyobj, "_call", py_args); + + if (pyret != NULL) + { + gobj_ret = pygobject_get(pyret); + + if (G_IS_OBJECT(gobj_ret)) + { + *out = gobj_ret; + + g_object_ref(G_OBJECT(*out)); + result = true; + + } + + Py_DECREF(pyret); + + } + + Py_DECREF(py_args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* CONNEXION AVEC L'API DE PYTHON */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * * Paramètres : self = élément d'appel à consulter. * * args = arguments fournis pour l'opération. * * * @@ -227,11 +622,15 @@ static PyObject *py_registered_item_get_name(PyObject *self, void *closure) PyTypeObject *get_python_registered_item_type(void) { static PyMethodDef py_registered_item_methods[] = { + REGISTERED_ITEM_RESOLVE_WRAPPER, + REGISTERED_ITEM_REDUCE_WRAPPER, + REGISTERED_ITEM_CALL_WRAPPER, REGISTERED_ITEM_RESOLVE_METHOD, { NULL } }; static PyGetSetDef py_registered_item_getseters[] = { + REGISTERED_ITEM_NAME_ATTRIB_WRAPPER, REGISTERED_ITEM_NAME_ATTRIB, { NULL } }; @@ -243,7 +642,7 @@ PyTypeObject *get_python_registered_item_type(void) .tp_name = "pychrysalide.analysis.scan.RegisteredItem", .tp_basicsize = sizeof(PyGObject), - .tp_flags = Py_TPFLAGS_DEFAULT, + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IS_ABSTRACT | Py_TPFLAGS_BASETYPE, .tp_doc = REGISTERED_ITEM_DOC, diff --git a/plugins/pychrysalide/analysis/scan/module.c b/plugins/pychrysalide/analysis/scan/module.c index ff19d92..2c5b1ef 100644 --- a/plugins/pychrysalide/analysis/scan/module.c +++ b/plugins/pychrysalide/analysis/scan/module.c @@ -35,6 +35,7 @@ #include "options.h" #include "scanner.h" #include "space.h" +#include "exprs/module.h" #include "patterns/module.h" #include "../../helpers.h" @@ -76,6 +77,7 @@ bool add_analysis_scan_module(PyObject *super) result = (module != NULL); + if (result) result = add_analysis_scan_exprs_module(module); if (result) result = add_analysis_scan_patterns_module(module); if (!result) @@ -113,6 +115,7 @@ bool populate_analysis_scan_module(void) if (result) result = populate_scan_module_with_core_methods(); + if (result) result = populate_analysis_scan_exprs_module(); if (result) result = populate_analysis_scan_patterns_module(); assert(result); |