diff options
Diffstat (limited to 'plugins/pychrysalide/glibext/tpmem.c')
-rw-r--r-- | plugins/pychrysalide/glibext/tpmem.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/plugins/pychrysalide/glibext/tpmem.c b/plugins/pychrysalide/glibext/tpmem.c new file mode 100644 index 0000000..ae07008 --- /dev/null +++ b/plugins/pychrysalide/glibext/tpmem.c @@ -0,0 +1,508 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * tpmem.c - équivalent Python du fichier "analysis/storage/tpmem.c" + * + * 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 "tpmem.h" + + +#include <pygobject.h> + + +#include <analysis/storage/tpmem.h> +#include <plugins/dt.h> + + +#include "../../access.h" +#include "../../helpers.h" +#include "../../common/packed.h" + + + +/* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ + + +/* Accompagne la création d'une instance dérivée en Python. */ +static PyObject *py_type_memory_new(PyTypeObject *, PyObject *, PyObject *); + +/* Initialise une instance sur la base du dérivé de GObject. */ +static int py_type_memory_init(PyObject *, PyObject *, PyObject *); + + + +/* -------------------------- TAMPON POUR CODE DESASSEMBLE -------------------------- */ + + +/* Apprend tous les types mémorisés dans un tampon. */ +static PyObject *py_type_memory_load_types(PyObject *, PyObject *); + +/* Crée une nouvelle instance d'objet à partir de son type. */ +static PyObject *py_type_memory_create_object(PyObject *, PyObject *); + +/* Sauvegarde le type d'un objet instancié. */ +static PyObject *py_type_memory_store_object_gtype(PyObject *, PyObject *); + +/* Enregistre tous les types mémorisés dans un tampon. */ +static PyObject *py_type_memory_store_types(PyObject *, PyObject *); + + + +/* ---------------------------------------------------------------------------------- */ +/* 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_type_memory_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_type_memory_type(); + + if (type == base) + goto simple_way; + + /* Mise en place d'un type dédié */ + + first_time = (g_type_from_name(type->tp_name) == 0); + + gtype = build_dynamic_type(G_TYPE_TYPE_MEMORY, type->tp_name, NULL, 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() */ + + simple_way: + + result = PyType_GenericNew(type, args, kwds); + + exit: + + return result; + +} + + +/****************************************************************************** +* * +* 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_type_memory_init(PyObject *self, PyObject *args, PyObject *kwds) +{ + int ret; /* Bilan de lecture des args. */ + +#define TYPE_MEMORY_DOC \ + "The TypeMemory remembers all the types of objects involved in" \ + " a serialization process.\n" \ + "\n" \ + "Instances can be created using the following constructor:\n" \ + "\n" \ + " TypeMemory()" \ + + /* Initialisation d'un objet GLib */ + + ret = forward_pygobjet_init(self); + if (ret == -1) return -1; + + return 0; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* TAMPON POUR CODE DESASSEMBLE */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant une mémorisation de types. * +* args = arguments fournis à l'appel. * +* * +* Description : Apprend tous les types mémorisés dans un tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_type_memory_load_types(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + packed_buffer_t *pbuf; /* Tampon à consulter */ + int ret; /* Bilan de lecture des args. */ + GTypeMemory *tpmem; /* Mémorisation native */ + bool status; /* Bilan de l'opération */ + +#define TYPE_MEMORY_LOAD_TYPES_METHOD PYTHON_METHOD_DEF \ +( \ + load_types, "$self, pbuf", \ + METH_VARARGS, py_type_memory, \ + "Read types from a buffer.\n" \ + "\n" \ + "This operation is usually handled internally by the" \ + " Chrysalide's core.\n" \ + "\n" \ + "The *pbuf* parameter is a pychrysalide.common.PackedBuffer"\ + " instance providing buffered data to read." \ + "\n" \ + "The result is a boolean value indicating the status of" \ + " the operation: True for success, False for failure." \ +) + + ret = PyArg_ParseTuple(args, "O&", convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + tpmem = G_TYPE_MEMORY(pygobject_get(self)); + + status = g_type_memory_load_types(tpmem, pbuf); + + result = status ? Py_True : Py_False; + Py_INCREF(result); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant une mémorisation de types. * +* args = arguments fournis à l'appel. * +* * +* Description : Crée une nouvelle instance d'objet à partir de son type. * +* * +* Retour : Instance issue de l'opération ou NULL. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_type_memory_create_object(PyObject *self, PyObject *args) +{ + PyObject *result; /* Instance à retourner */ + packed_buffer_t *pbuf; /* Tampon à consulter */ + int ret; /* Bilan de lecture des args. */ + GTypeMemory *tpmem; /* Mémorisation native */ + GObject *obj; /* Instance retournée */ + +#define TYPE_MEMORY_CREATE_OBJECT_METHOD PYTHON_METHOD_DEF \ +( \ + create_object, "$self, pbuf", \ + METH_VARARGS, py_type_memory, \ + "Create a new GLib object from serialized data.\n" \ + "\n" \ + "The *pbuf* parameter is a pychrysalide.common.PackedBuffer" \ + " instance providing buffered data to read." \ + "\n" \ + "The result is a Python object linked to a native GLib" \ + " object instance." \ +) + + ret = PyArg_ParseTuple(args, "O&", convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + tpmem = G_TYPE_MEMORY(pygobject_get(self)); + + obj = g_type_memory_create_object(tpmem, pbuf); + + result = pygobject_new(obj); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant une mémorisation de types. * +* args = arguments fournis à l'appel. * +* * +* Description : Sauvegarde le type d'un objet instancié. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_type_memory_store_object_gtype(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + GObject *obj; /* Instance à traiter */ + packed_buffer_t *pbuf; /* Tampon à consulter */ + int ret; /* Bilan de lecture des args. */ + GTypeMemory *tpmem; /* Mémorisation native */ + bool status; /* Bilan de l'opération */ + +#define TYPE_MEMORY_STORE_OBJECT_GTYPE_METHOD PYTHON_METHOD_DEF \ +( \ + store_object_gtype, "$self, obj, pbuf", \ + METH_VARARGS, py_type_memory, \ + "Create a new GLib object from serialized data.\n" \ + "\n" \ + "The *obj* parameter is the Python version of the GObject" \ + " whose type is to process and the *pbuf* parameter is a" \ + " pychrysalide.common.PackedBuffer instance providing buffered" \ + " data to extend." \ + "\n" \ + "The result is a boolean value indicating the status of the" \ + " operation: True for success, False for failure." \ +) + + ret = PyArg_ParseTuple(args, "O!O&", PyGObject_Type, &obj, convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + tpmem = G_TYPE_MEMORY(pygobject_get(self)); + + status = g_type_memory_store_object_gtype(tpmem, obj, pbuf); + + result = status ? Py_True : Py_False; + Py_INCREF(result); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : self = classe représentant une mémorisation de types. * +* args = arguments fournis à l'appel. * +* * +* Description : Enregistre tous les types mémorisés dans un tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_type_memory_store_types(PyObject *self, PyObject *args) +{ + PyObject *result; /* Bilan à retourner */ + packed_buffer_t *pbuf; /* Tampon à consulter */ + int ret; /* Bilan de lecture des args. */ + GTypeMemory *tpmem; /* Mémorisation native */ + bool status; /* Bilan de l'opération */ + +#define TYPE_MEMORY_STORE_TYPES_METHOD PYTHON_METHOD_DEF \ +( \ + store_types, "$self, pbuf", \ + METH_VARARGS, py_type_memory, \ + "Write types into a buffer.\n" \ + "\n" \ + "This operation is usually handled internally by the" \ + " Chrysalide's core.\n" \ + "\n" \ + "The *pbuf* parameter is a pychrysalide.common.PackedBuffer"\ + " instance providing buffered data to read." \ + "\n" \ + "The result is a boolean value indicating the status of" \ + " the operation: True for success, False for failure." \ +) + + ret = PyArg_ParseTuple(args, "O&", convert_to_packed_buffer, &pbuf); + if (!ret) return NULL; + + tpmem = G_TYPE_MEMORY(pygobject_get(self)); + + status = g_type_memory_store_types(tpmem, 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_type_memory_type(void) +{ + static PyMethodDef py_type_memory_methods[] = { + TYPE_MEMORY_LOAD_TYPES_METHOD, + TYPE_MEMORY_CREATE_OBJECT_METHOD, + TYPE_MEMORY_STORE_OBJECT_GTYPE_METHOD, + TYPE_MEMORY_STORE_TYPES_METHOD, + { NULL } + }; + + static PyGetSetDef py_type_memory_getseters[] = { + { NULL } + }; + + static PyTypeObject py_type_memory_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.analysis.storage.TypeMemory", + .tp_basicsize = sizeof(PyGObject), + + .tp_flags = Py_TPFLAGS_DEFAULT, + + .tp_doc = TYPE_MEMORY_DOC, + + .tp_methods = py_type_memory_methods, + .tp_getset = py_type_memory_getseters, + + .tp_init = py_type_memory_init, + .tp_new = py_type_memory_new + + }; + + return &py_type_memory_type; + +} + + +/****************************************************************************** +* * +* Paramètres : module = module dont la définition est à compléter. * +* * +* Description : Prend en charge l'objet 'pychrysalide.analysis...TypeMemory'.* +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool ensure_python_type_memory_is_registered(void) +{ + PyTypeObject *type; /* Type Python 'BufferCache' */ + PyObject *module; /* Module à recompléter */ + PyObject *dict; /* Dictionnaire du module */ + + type = get_python_type_memory_type(); + + if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) + { + module = get_access_to_python_module("pychrysalide.analysis.storage"); + + dict = PyModule_GetDict(module); + + if (!register_class_for_pygobject(dict, G_TYPE_TYPE_MEMORY, 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 mémorisation de types. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_type_memory(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + + result = PyObject_IsInstance(arg, (PyObject *)get_python_type_memory_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 buffer cache"); + break; + + case 1: + *((GTypeMemory **)dst) = G_TYPE_MEMORY(pygobject_get(arg)); + break; + + default: + assert(false); + break; + + } + + return result; + +} |