/* Chrysalide - Outil d'analyse de fichiers binaires * known.c - équivalent Python du fichier "format/known.c" * * Copyright (C) 2019 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 "known.h" #include #include #include #include #include "../access.h" #include "../helpers.h" #include "../analysis/content.h" /* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ /* Accompagne la création d'une instance dérivée en Python. */ static PyObject *py_known_format_new(PyTypeObject *, PyObject *, PyObject *); /* Initialise la classe des descriptions de fichier binaire. */ static void py_known_format_init_gclass(GKnownFormatClass *, gpointer); /* Initialise une instance sur la base du dérivé de GObject. */ static int py_known_format_init(PyObject *, PyObject *, PyObject *); /* Indique la désignation interne du format. */ static char *py_known_format_get_key_wrapper(const GKnownFormat *); /* Fournit une description humaine du format. */ static char *py_known_format_get_description_wrapper(const GKnownFormat *); /* Assure l'interprétation d'un format en différé. */ static bool py_known_format_analyze_wrapper(GKnownFormat *, wgroup_id_t, GtkStatusStack *); /* Réalise un traitement post-désassemblage. */ static void py_known_format_complete_analysis_wrapper(GKnownFormat *, wgroup_id_t, GtkStatusStack *); /* --------------------------- DEFINITION DU FORMAT CONNU --------------------------- */ /* Assure l'interprétation d'un format en différé. */ static PyObject *py_known_format_analyze(PyObject *, PyObject *); /* Réalise un traitement post-désassemblage. */ static PyObject *py_known_format_complete_analysis(PyObject *, PyObject *); /* Indique la désignation interne du format. */ static PyObject *py_known_format_get_key(PyObject *, void *); /* Indique la désignation humaine du format. */ static PyObject *py_known_format_get_description(PyObject *, void *); /* Fournit une référence vers le contenu binaire analysé. */ static PyObject *py_known_format_get_content(PyObject *, void *); /* ---------------------------------------------------------------------------------- */ /* GLUE POUR CREATION DEPUIS PYTHON */ /* ---------------------------------------------------------------------------------- */ /****************************************************************************** * * * Paramètres : type = type du nouvel objet à mettre en place. * * args = éventuelle liste d'arguments. * * kwds = éventuel dictionnaire de valeurs mises à disposition. * * * * Description : Accompagne la création d'une instance dérivée en Python. * * * * Retour : Nouvel objet Python mis en place ou NULL en cas d'échec. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_new(PyTypeObject *type, PyObject *args, PyObject *kwds) { PyObject *result; /* Objet à retourner */ PyTypeObject *base; /* Type de base à dériver */ bool first_time; /* Evite les multiples passages*/ GType gtype; /* Nouveau type de processeur */ bool status; /* Bilan d'un enregistrement */ /* Validations diverses */ base = get_python_known_format_type(); if (type == base) { result = NULL; PyErr_Format(PyExc_RuntimeError, _("%s is an abstract class"), type->tp_name); goto exit; } /* Mise en place d'un type dédié */ first_time = (g_type_from_name(type->tp_name) == 0); gtype = build_dynamic_type(G_TYPE_KNOWN_FORMAT, type->tp_name, (GClassInitFunc)py_known_format_init_gclass, NULL, NULL); if (first_time) { status = register_class_for_dynamic_pygobject(gtype, type); if (!status) { result = NULL; goto exit; } } /* On crée, et on laisse ensuite la main à PyGObject_Type.tp_init() */ result = PyType_GenericNew(type, args, kwds); exit: return result; } /****************************************************************************** * * * Paramètres : class = classe à initialiser. * * unused = données non utilisées ici. * * * * Description : Initialise la classe générique des processeurs. * * * * Retour : - * * * * Remarques : - * * * ******************************************************************************/ static void py_known_format_init_gclass(GKnownFormatClass *class, gpointer unused) { class->get_key = py_known_format_get_key_wrapper; class->get_desc = py_known_format_get_description_wrapper; class->analyze = py_known_format_analyze_wrapper; class->complete = py_known_format_complete_analysis_wrapper; } /****************************************************************************** * * * 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_known_format_init(PyObject *self, PyObject *args, PyObject *kwds) { GBinContent *content; /* Contenu à intégrer au format*/ int ret; /* Bilan de lecture des args. */ GKnownFormat *format; /* Format à manipuler */ #define KNOWN_FORMAT_DOC \ "KnownFormat is a small class providing basic features for" \ " recognized formats.\n" \ "\n" \ "One item has to be defined as class attribute in the final" \ " class:\n" \ "* *_key*: a string providing a small name used to identify the" \ " format.\n" \ "\n" \ "The following methods have to be defined for new classes:\n" \ "* pychrysalide.format.KnownFormat._get_description();\n" \ "* pychrysalide.format.KnownFormat._analyze().\n" \ "\n" \ "The following method may also be defined for new classes too:\n" \ "* pychrysalide.format.KnownFormat._complete_analysis().\n" \ "\n" \ "Calls to the *__init__* constructor of this abstract object expect"\ " only one argument: a binary content, provided as a" \ " pychrysalide.analysis.BinContent instance." /* Récupération des paramètres */ ret = PyArg_ParseTuple(args, "O&", convert_to_binary_content, &content); if (!ret) return -1; /* Initialisation d'un objet GLib */ ret = forward_pygobjet_init(self); if (ret == -1) return -1; /* Eléments de base */ format = G_KNOWN_FORMAT(pygobject_get(self)); g_known_format_set_content(format, content); return 0; } /****************************************************************************** * * * Paramètres : format = description du format connu à consulter. * * * * Description : Indique la désignation interne du format. * * * * Retour : Désignation du format. * * * * Remarques : - * * * ******************************************************************************/ static char *py_known_format_get_key_wrapper(const GKnownFormat *format) { char *result; /* Désignation à renvoyer */ PyGILState_STATE gstate; /* Sauvegarde d'environnement */ PyObject *pyobj; /* Objet Python concerné */ PyObject *pykey; /* Clef en objet Python */ int ret; /* Bilan d'une conversion */ result = NULL; gstate = PyGILState_Ensure(); pyobj = pygobject_new(G_OBJECT(format)); if (PyObject_HasAttrString(pyobj, "_key")) { pykey = PyObject_GetAttrString(pyobj, "_key"); if (pykey != NULL) { ret = PyUnicode_Check(pykey); if (ret) result = strdup(PyUnicode_AsUTF8(pykey)); Py_DECREF(pykey); } } Py_DECREF(pyobj); PyGILState_Release(gstate); return result; } /****************************************************************************** * * * Paramètres : format = description du format connu à consulter. * * * * Description : Fournit une description humaine du format. * * * * Retour : Description du format. * * * * Remarques : - * * * ******************************************************************************/ static char *py_known_format_get_description_wrapper(const GKnownFormat *format) { char *result; /* Description à retourner */ PyGILState_STATE gstate; /* Sauvegarde d'environnement */ PyObject *pyobj; /* Objet Python concerné */ PyObject *pyret; /* Bilan de consultation */ int ret; /* Bilan d'une conversion */ #define KNOWN_FORMAT_GET_DESCRIPTION_WRAPPER PYTHON_WRAPPER_DEF \ ( \ _get_description, "$self, /", \ METH_NOARGS, \ "Abstract method used to build a description of the format.\n" \ "\n" \ "The result is expected to be a string." \ ) result = NULL; gstate = PyGILState_Ensure(); pyobj = pygobject_new(G_OBJECT(format)); if (has_python_method(pyobj, "_get_description")) { pyret = run_python_method(pyobj, "_get_description", NULL); if (pyret != NULL) { ret = PyUnicode_Check(pyret); if (ret) result = strdup(PyUnicode_AsUTF8(pyret)); Py_DECREF(pyret); } } Py_DECREF(pyobj); PyGILState_Release(gstate); return result; } /****************************************************************************** * * * Paramètres : format = format chargé dont l'analyse est lancée. * * gid = groupe de travail dédié. * * status = barre de statut à tenir informée. * * * * Description : Assure l'interprétation d'un format en différé. * * * * Retour : Bilan de l'opération. * * * * Remarques : - * * * ******************************************************************************/ static bool py_known_format_analyze_wrapper(GKnownFormat *format, wgroup_id_t gid, GtkStatusStack *status) { bool result; /* Bilan à retourner */ PyGILState_STATE gstate; /* Sauvegarde d'environnement */ PyObject *pyobj; /* Objet Python concerné */ PyObject *args; /* Arguments pour l'appel */ PyObject *pyret; /* Bilan d'exécution */ #define KNOWN_FORMAT_ANALYZE_WRAPPER PYTHON_WRAPPER_DEF \ ( \ _analyze, "$self, gid, status, /", \ METH_VARARGS, \ "Abstract method used to start the analysis of the known" \ " format and return its status.\n" \ "\n" \ "The identifier refers to the working queue used to process" \ " the analysis. A reference to the main status bar may also be" \ " provided, as a pychrysalide.gtkext.StatusStack instance if" \ " running in graphical mode or None otherwise.\n" \ "\n" \ "The expected result of the call is a boolean." \ ) result = false; gstate = PyGILState_Ensure(); pyobj = pygobject_new(G_OBJECT(format)); if (has_python_method(pyobj, "_analyze")) { args = PyTuple_New(2); PyTuple_SetItem(args, 0, PyLong_FromUnsignedLong(gid)); PyTuple_SetItem(args, 1, pygobject_new(G_OBJECT(status))); pyret = run_python_method(pyobj, "_analyze", args); result = (pyret == Py_True); Py_DECREF(args); Py_XDECREF(pyret); } Py_DECREF(pyobj); PyGILState_Release(gstate); return result; } /****************************************************************************** * * * Paramètres : format = format chargé dont l'analyse est lancée. * * gid = groupe de travail dédié. * * status = barre de statut à tenir informée. * * * * Description : Réalise un traitement post-désassemblage. * * * * Retour : - * * * * Remarques : - * * * ******************************************************************************/ static void py_known_format_complete_analysis_wrapper(GKnownFormat *format, wgroup_id_t gid, GtkStatusStack *status) { PyGILState_STATE gstate; /* Sauvegarde d'environnement */ PyObject *pyobj; /* Objet Python concerné */ PyObject *args; /* Arguments pour l'appel */ PyObject *pyret; /* Bilan d'exécution */ #define KNOWN_FORMAT_COMPLETE_ANALYSIS_WRAPPER PYTHON_VOID_WRAPPER_DEF \ ( \ _complete_analysis, "$self, gid, status, /", \ METH_VARARGS, \ "Abstract method used to complete an analysis of a known format.\n" \ "\n" \ "The identifier refers to the working queue used to process the" \ " analysis. A reference to the main status bar may also be" \ " provided, as a pychrysalide.gtkext.StatusStack instance if" \ " running in graphical mode or None otherwise.\n" \ ) gstate = PyGILState_Ensure(); pyobj = pygobject_new(G_OBJECT(format)); if (has_python_method(pyobj, "_complete_analysis")) { args = PyTuple_New(2); PyTuple_SetItem(args, 0, PyLong_FromUnsignedLong(gid)); PyTuple_SetItem(args, 1, pygobject_new(G_OBJECT(status))); pyret = run_python_method(pyobj, "_complete_analysis", args); Py_DECREF(args); Py_XDECREF(pyret); } Py_DECREF(pyobj); PyGILState_Release(gstate); } /* ---------------------------------------------------------------------------------- */ /* DEFINITION DU FORMAT CONNU */ /* ---------------------------------------------------------------------------------- */ /****************************************************************************** * * * Paramètres : self = objet représentant un format connu. * * args = arguments fournis pour l'opération. * * * * Description : Assure l'interprétation d'un format en différé. * * * * Retour : Bilan de l'opération. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_analyze(PyObject *self, PyObject *args) { PyObject *result; /* Bilan à retourner */ int ret; /* Bilan de lecture des args. */ GKnownFormat *format; /* Format connu manipulé */ bool status; /* Bilan de l'opération */ #define KNOWN_FORMAT_ANALYZE_METHOD PYTHON_METHOD_DEF \ ( \ analyze, "$self, gid, status, /", \ METH_VARARGS, py_known_format, \ "Start the analysis of the known format and return its status." \ "\n" \ "Once this analysis is done, a few early symbols and the" \ " mapped sections are expected to be defined, if any.\n" \ "\n" \ "The identifier refers to the working queue used to process" \ " the analysis. A reference to the main status bar may also be" \ " provided, as a pychrysalide.gtkext.StatusStack instance if" \ " running in graphical mode or None otherwise.\n" \ "\n" \ "The return value is a boolean status of the operation." \ ) ret = PyArg_ParseTuple(args, "");//|KO!", &gid, &status); if (!ret) return NULL; format = G_KNOWN_FORMAT(pygobject_get(self)); status = g_known_format_analyze(format, 0, NULL); result = status ? Py_True : Py_False; Py_INCREF(result); return result; } /****************************************************************************** * * * Paramètres : self = objet représentant un format connu. * * args = arguments fournis pour l'opération. * * * * Description : Réalise un traitement post-désassemblage. * * * * Retour : - * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_complete_analysis(PyObject *self, PyObject *args) { PyObject *result; /* Bilan à retourner */ int ret; /* Bilan de lecture des args. */ GKnownFormat *format; /* Format connu manipulé */ #define KNOWN_FORMAT_COMPLETE_ANALYSIS_METHOD PYTHON_METHOD_DEF \ ( \ complete_analysis, "$self, gid, status, /", \ METH_VARARGS, py_known_format, \ "Complete an analysis of a known format.\n" \ "\n" \ "This process is usually done once the disassembling process" \ " is completed.\n" \ "\n" \ "The identifier refers to the working queue used to process" \ " the analysis. A reference to the main status bar may also be" \ " provided, as a pychrysalide.gtkext.StatusStack instance if" \ " running in graphical mode or None otherwise.\n" \ "\n" \ "The return value is a boolean status of the operation." \ ) ret = PyArg_ParseTuple(args, "");//|KO!", &gid, &status); if (!ret) return NULL; format = G_KNOWN_FORMAT(pygobject_get(self)); g_known_format_complete_analysis(format, 0, NULL); result = Py_None; Py_INCREF(result); return result; } /****************************************************************************** * * * Paramètres : self = objet Python concerné par l'appel. * * closure = non utilisé ici. * * * * Description : Indique la désignation interne du format. * * * * Retour : Désignation du format. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_get_key(PyObject *self, void *closure) { PyObject *result; /* Trouvailles à retourner */ GKnownFormat *format; /* Format de binaire manipulé */ char *key; /* Désignation interne */ #define KNOWN_FORMAT_KEY_ATTRIB PYTHON_GET_DEF_FULL \ ( \ key, py_known_format, \ "Internal name of the known format, provided as a (tiny) string." \ ) format = G_KNOWN_FORMAT(pygobject_get(self)); key = g_known_format_get_key(format); result = PyUnicode_FromString(key); free(key); return result; } /****************************************************************************** * * * Paramètres : self = objet Python concerné par l'appel. * * closure = non utilisé ici. * * * * Description : Indique la désignation humaine du format. * * * * Retour : Description du format. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_get_description(PyObject *self, void *closure) { PyObject *result; /* Trouvailles à retourner */ GKnownFormat *format; /* Format de binaire manipulé */ char *desc; /* Description humaine */ #define KNOWN_FORMAT_DESCRIPTION_ATTRIB PYTHON_GET_DEF_FULL \ ( \ description, py_known_format, \ "Human description of the known format, as a string." \ ) format = G_KNOWN_FORMAT(pygobject_get(self)); desc = g_known_format_get_description(format); result = PyUnicode_FromString(desc); free(desc); return result; } /****************************************************************************** * * * Paramètres : self = objet Python concerné par l'appel. * * closure = non utilisé ici. * * * * Description : Fournit une référence vers le contenu binaire analysé. * * * * Retour : Gestionnaire de contenu binaire en place. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_known_format_get_content(PyObject *self, void *closure) { PyObject *result; /* Trouvailles à retourner */ GKnownFormat *format; /* Format de binaire manipulé */ GBinContent *content; /* Instance GLib correspondante*/ #define KNOWN_FORMAT_CONTENT_ATTRIB PYTHON_GET_DEF_FULL \ ( \ content, py_known_format, \ "Binary content linked to the known format." \ "\n" \ "The result is a pychrysalide.analysis.BinContent instance." \ ) format = G_KNOWN_FORMAT(pygobject_get(self)); content = g_known_format_get_content(format); if (content != NULL) { result = pygobject_new(G_OBJECT(content)); g_object_unref(content); } else { result = Py_None; Py_INCREF(result); } return result; } /****************************************************************************** * * * Paramètres : - * * * * Description : Fournit un accès à une définition de type à diffuser. * * * * Retour : Définition d'objet pour Python. * * * * Remarques : - * * * ******************************************************************************/ PyTypeObject *get_python_known_format_type(void) { static PyMethodDef py_known_format_methods[] = { KNOWN_FORMAT_GET_DESCRIPTION_WRAPPER, KNOWN_FORMAT_ANALYZE_WRAPPER, KNOWN_FORMAT_COMPLETE_ANALYSIS_WRAPPER, KNOWN_FORMAT_ANALYZE_METHOD, KNOWN_FORMAT_COMPLETE_ANALYSIS_METHOD, { NULL } }; static PyGetSetDef py_known_format_getseters[] = { KNOWN_FORMAT_KEY_ATTRIB, KNOWN_FORMAT_DESCRIPTION_ATTRIB, KNOWN_FORMAT_CONTENT_ATTRIB, { NULL } }; static PyTypeObject py_known_format_type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "pychrysalide.format.KnownFormat", .tp_basicsize = sizeof(PyGObject), .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IS_ABSTRACT | Py_TPFLAGS_BASETYPE, .tp_doc = KNOWN_FORMAT_DOC, .tp_methods = py_known_format_methods, .tp_getset = py_known_format_getseters, .tp_init = py_known_format_init, .tp_new = py_known_format_new, }; return &py_known_format_type; } /****************************************************************************** * * * Paramètres : module = module dont la définition est à compléter. * * * * Description : Prend en charge l'objet 'pychrysalide.format.BinFormat'. * * * * Retour : Bilan de l'opération. * * * * Remarques : - * * * ******************************************************************************/ bool ensure_python_known_format_is_registered(void) { PyTypeObject *type; /* Type Python 'BinFormat' */ PyObject *module; /* Module à recompléter */ PyObject *dict; /* Dictionnaire du module */ type = get_python_known_format_type(); if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) { module = get_access_to_python_module("pychrysalide.format"); dict = PyModule_GetDict(module); if (!register_class_for_pygobject(dict, G_TYPE_KNOWN_FORMAT, 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 format connu. * * * * Retour : Bilan de l'opération, voire indications supplémentaires. * * * * Remarques : - * * * ******************************************************************************/ int convert_to_known_format(PyObject *arg, void *dst) { int result; /* Bilan à retourner */ result = PyObject_IsInstance(arg, (PyObject *)get_python_known_format_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 known format"); break; case 1: *((GKnownFormat **)dst) = G_KNOWN_FORMAT(pygobject_get(arg)); break; default: assert(false); break; } return result; }