diff options
Diffstat (limited to 'plugins/pychrysalide/glibext/serialize.c')
-rw-r--r-- | plugins/pychrysalide/glibext/serialize.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/plugins/pychrysalide/glibext/serialize.c b/plugins/pychrysalide/glibext/serialize.c new file mode 100644 index 0000000..40fcef7 --- /dev/null +++ b/plugins/pychrysalide/glibext/serialize.c @@ -0,0 +1,501 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * serialize.c - équivalent Python du fichier "analysis/storage/serialize.h" + * + * Copyright (C) 2020 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 "serialize.h" + + +#include <pygobject.h> + + +#include <analysis/storage/serialize-int.h> + + +#include "storage.h" +#include "../../access.h" +#include "../../helpers.h" +#include "../../common/packed.h" + + + +/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ + + +/* Procède à l'initialisation de l'interface de génération. */ +static void py_serializable_object_interface_init(GSerializableObjectIface *, gpointer *); + +/* Charge un objet depuis une mémoire tampon. */ +static bool py_serializable_object_load_wrapper(GSerializableObject *, GObjectStorage *, packed_buffer_t *); + +/* Sauvegarde un objet dans une mémoire tampon. */ +static bool py_serializable_object_store_wrapper(const GSerializableObject *, GObjectStorage *, packed_buffer_t *); + + + +/* ------------------------- CONNEXION AVEC L'API DE PYTHON ------------------------- */ + + +/* Charge un objet depuis une mémoire tampon. */ +static bool py_serializable_object_load(PyObject *, PyObject *); + +/* Sauvegarde un objet dans une mémoire tampon. */ +static bool py_serializable_object_store(PyObject *, PyObject *); + + + +/* ---------------------------------------------------------------------------------- */ +/* GLUE POUR CREATION DEPUIS PYTHON */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : iface = interface GLib à initialiser. * +* unused = adresse non utilisée ici. * +* * +* Description : Procède à l'initialisation de l'interface de génération. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void py_serializable_object_interface_init(GSerializableObjectIface *iface, gpointer *unused) +{ + +#define SERIALIZABLE_OBJECT_DOC \ + "SerializableObject defines an interface used to store and load" \ + " objects to and from a data buffer.\n" \ + "\n" \ + "A typical class declaration for a new implementation looks like:\n" \ + "\n" \ + " class NewImplem(GObject.Object, SerializableObject):\n" \ + " ...\n" \ + "\n" \ + "The following methods have to be defined for new implementations:\n" \ + "* pychrysalide.analysis.storage.SerializableObject._load();\n" \ + "* pychrysalide.analysis.storage.SerializableObject._store();\n" + + iface->load = py_serializable_object_load_wrapper; + iface->store = py_serializable_object_store_wrapper; + +} + + +/****************************************************************************** +* * +* Paramètres : object = instruction d'assemblage à consulter. * +* storage = conservateur de données à manipuler ou NULL. * +* pbuf = zone tampon à remplir. * +* * +* Description : Charge un objet depuis une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_serializable_object_load_wrapper(GSerializableObject *object, GObjectStorage *storage, packed_buffer_t *pbuf) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *storage_obj; /* Objet Python à emmployer */ + PyObject *args; /* Arguments pour l'appel */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *pyret; /* Bilan de consultation */ + +#define SERIALIZABLE_OBJECT_LOAD_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _load, "$self, storage, pbuf, /", \ + METH_VARARGS, \ + "Abstract method used to load an object definition from buffered data.\n" \ + "\n" \ + "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \ + " provided to store inner objects, if relevant, or None. The *pbuf*" \ + " argument points to a pychrysalide.common.PackedBuffer object containing" \ + " the data to process.\n" \ + "\n" \ + "The result is a boolean indicating the status of the operation." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(object)); + + if (has_python_method(pyobj, "_load")) + { + if (storage == NULL) + { + storage_obj = Py_None; + Py_INCREF(storage_obj); + } + else + storage_obj = pygobject_new(G_OBJECT(storage)); + + args = PyTuple_New(2); + PyTuple_SetItem(args, 0, storage_obj); + PyTuple_SetItem(args, 1, build_from_internal_packed_buffer(pbuf)); + + pyret = run_python_method(pyobj, "_load", args); + + result = (pyret == Py_True ? true : false); + + Py_XDECREF(pyret); + + Py_DECREF(args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : object = instruction d'assemblage à consulter. * +* storage = conservateur de données à manipuler ou NULL. * +* pbuf = zone tampon à remplir. * +* * +* Description : Sauvegarde un objet dans une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_serializable_object_store_wrapper(const GSerializableObject *object, GObjectStorage *storage, packed_buffer_t *pbuf) +{ + bool result; /* Bilan à retourner */ + PyGILState_STATE gstate; /* Sauvegarde d'environnement */ + PyObject *storage_obj; /* Objet Python à emmployer */ + PyObject *args; /* Arguments pour l'appel */ + PyObject *pyobj; /* Objet Python concerné */ + PyObject *pyret; /* Bilan de consultation */ + +#define SERIALIZABLE_OBJECT_STORE_WRAPPER PYTHON_WRAPPER_DEF \ +( \ + _store, "$self, storage, pbuf, /", \ + METH_VARARGS, \ + "Abstract method used to store an object definition into buffered data.\n" \ + "\n" \ + "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \ + " provided to store inner objects, if relevant, or None. The *pbuf*" \ + " argument points to a pychrysalide.common.PackedBuffer object containing" \ + " the data to process.\n" \ + "\n" \ + "The result is a boolean indicating the status of the operation." \ +) + + result = false; + + gstate = PyGILState_Ensure(); + + pyobj = pygobject_new(G_OBJECT(object)); + + if (has_python_method(pyobj, "_store")) + { + if (storage == NULL) + { + storage_obj = Py_None; + Py_INCREF(storage_obj); + } + else + storage_obj = pygobject_new(G_OBJECT(storage)); + + args = PyTuple_New(2); + PyTuple_SetItem(args, 0, storage_obj); + PyTuple_SetItem(args, 1, build_from_internal_packed_buffer(pbuf)); + + pyret = run_python_method(pyobj, "_store", args); + + result = (pyret == Py_True ? true : false); + + Py_XDECREF(pyret); + + Py_DECREF(args); + + } + + Py_DECREF(pyobj); + + PyGILState_Release(gstate); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* CONNEXION AVEC L'API DE PYTHON */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant un générateur à manipuler. * +* args = arguments fournis à l'appel. * +* * +* Description : Charge un objet depuis une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_serializable_object_load(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + GObjectStorage *storage; /* Conservateur à manipuler */ + packed_buffer_t *pbuf; /* Tampon de données à employer*/ + int ret; /* Bilan de lecture des args. */ + GSerializableObject *object; /* Version native */ + bool status; /* Bilan de l'opération */ + +#define SERIALIZABLE_OBJECT_LOAD_METHOD PYTHON_METHOD_DEF \ +( \ + load, "$self, storage, pbuf, /", \ + METH_VARARGS, py_serializable_object, \ + "Load an object definition from buffered data.\n" \ + "\n" \ + "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \ + " provided to store inner objects, if relevant, or None. The *pbuf*" \ + " argument points to a pychrysalide.common.PackedBuffer object containing" \ + " the data to process.\n" \ + "\n" \ + "The result is a boolean indicating the status of the operation." \ +) + + ret = PyArg_ParseTuple(args, "O&O&", convert_to_object_storage_or_none, &storage, + convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + object = G_SERIALIZABLE_OBJECT(pygobject_get(self)); + + status = g_serializable_object_load(object, storage, pbuf); + + result = status ? Py_True : Py_False; + Py_INCREF(result); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant un générateur à manipuler. * +* args = arguments fournis à l'appel. * +* * +* Description : Sauvegarde un objet dans une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool py_serializable_object_store(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + GObjectStorage *storage; /* Conservateur à manipuler */ + packed_buffer_t *pbuf; /* Tampon de données à employer*/ + int ret; /* Bilan de lecture des args. */ + GSerializableObject *object; /* Version native */ + bool status; /* Bilan de l'opération */ + +#define SERIALIZABLE_OBJECT_STORE_METHOD PYTHON_METHOD_DEF \ +( \ + store, "$self, storage, pbuf, /", \ + METH_VARARGS, py_serializable_object, \ + "Store an object definition into buffered data.\n" \ + "\n" \ + "The *storage* is a pychrysalide.analysis.storage.ObjectStorage instance" \ + " provided to store inner objects, if relevant, or None. The *pbuf*" \ + " argument points to a pychrysalide.common.PackedBuffer object containing" \ + " the data to process.\n" \ + "\n" \ + "The result is a boolean indicating the status of the operation." \ +) + + ret = PyArg_ParseTuple(args, "O&O&", convert_to_object_storage_or_none, &storage, + convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + object = G_SERIALIZABLE_OBJECT(pygobject_get(self)); + + status = g_serializable_object_store(object, storage, pbuf); + + result = status ? Py_True : Py_False; + 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_serializable_object_type(void) +{ + static PyMethodDef py_serializable_object_methods[] = { + SERIALIZABLE_OBJECT_LOAD_WRAPPER, + SERIALIZABLE_OBJECT_STORE_WRAPPER, + SERIALIZABLE_OBJECT_LOAD_METHOD, + SERIALIZABLE_OBJECT_STORE_METHOD, + { NULL } + }; + + static PyGetSetDef py_serializable_object_getseters[] = { + { NULL } + }; + + static PyTypeObject py_serializable_object_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.analysis.storage.SerializableObject", + .tp_basicsize = sizeof(PyObject), + + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + + .tp_doc = SERIALIZABLE_OBJECT_DOC, + + .tp_methods = py_serializable_object_methods, + .tp_getset = py_serializable_object_getseters, + + }; + + return &py_serializable_object_type; + +} + + +/****************************************************************************** +* * +* Paramètres : module = module dont la définition est à compléter. * +* * +* Description : Prend en charge l'objet 'pychrysalide....SerializableObject'.* +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool ensure_python_serializable_object_is_registered(void) +{ + PyTypeObject *type; /* Type 'SerializableObject' */ + PyObject *module; /* Module à recompléter */ + PyObject *dict; /* Dictionnaire du module */ + + static GInterfaceInfo info = { /* Paramètres d'inscription */ + + .interface_init = (GInterfaceInitFunc)py_serializable_object_interface_init, + .interface_finalize = NULL, + .interface_data = NULL, + + }; + + type = get_python_serializable_object_type(); + + if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) + { + module = get_access_to_python_module("pychrysalide.analysis.storage"); + + dict = PyModule_GetDict(module); + + if (!register_interface_for_pygobject(dict, G_TYPE_SERIALIZABLE_OBJECT, type, &info)) + 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 objet adapté à une mise en cache. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_serializable_object(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + + result = PyObject_IsInstance(arg, (PyObject *)get_python_serializable_object_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 serializable object"); + break; + + case 1: + *((GSerializableObject **)dst) = G_SERIALIZABLE_OBJECT(pygobject_get(arg)); + break; + + default: + assert(false); + break; + + } + + return result; + +} |