1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/* Chrysalide - Outil d'analyse de fichiers binaires
* flat.c - équivalent Python du fichier "format/flat.c"
*
* Copyright (C) 2018-2019 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 "flat.h"
#include <pygobject.h>
#include <format/flat.h>
#include "executable.h"
#include "../access.h"
#include "../helpers.h"
#include "../analysis/content.h"
/* Crée un nouvel objet Python de type 'FlatFormat'. */
static PyObject *py_flat_format_new(PyTypeObject *, PyObject *, PyObject *);
/******************************************************************************
* *
* Paramètres : type = type de l'objet à instancier. *
* args = arguments fournis à l'appel. *
* kwds = arguments de type key=val fournis. *
* *
* Description : Crée un nouvel objet Python de type 'FlatFormat'. *
* *
* Retour : Instance Python mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_flat_format_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyObject *result; /* Instance à retourner */
GBinContent *content; /* Instance GLib du contenu */
const char *machine; /* Identifiant d'architecture */
unsigned int endian; /* Boutisme de l'architecture */
int ret; /* Bilan de lecture des args. */
GExeFormat *format; /* Création GLib à transmettre */
#define FLAT_FORMAT_DOC \
"FlatFormat is suitable for all executable contents without a proper" \
" file format, such as shellcodes ou eBPF programs.\n" \
"\n" \
"Instances can be created using the following constructor:\n" \
"\n" \
" FlatFormat(content, machine, endian)" \
"\n" \
"Where content is a pychrysalide.analysis.BinContent object, machine" \
" defines the target architecture and endian provides the right" \
" endianness of the data."
ret = PyArg_ParseTuple(args, "O&sI", convert_to_binary_content, &content, &machine, &endian);
if (!ret) return NULL;
format = g_flat_format_new(content, machine, endian);
if (format == NULL)
{
result = Py_None;
Py_INCREF(result);
}
else
{
result = pygobject_new(G_OBJECT(format));
g_object_unref(format);
}
return result;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Fournit un accès à une définition de type à diffuser. *
* *
* Retour : Définition d'objet pour Python. *
* *
* Remarques : - *
* *
******************************************************************************/
PyTypeObject *get_python_flat_format_type(void)
{
static PyMethodDef py_flat_format_methods[] = {
{ NULL }
};
static PyGetSetDef py_flat_format_getseters[] = {
{ NULL }
};
static PyTypeObject py_flat_format_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "pychrysalide.format.FlatFormat",
.tp_basicsize = sizeof(PyGObject),
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = FLAT_FORMAT_DOC,
.tp_methods = py_flat_format_methods,
.tp_getset = py_flat_format_getseters,
.tp_new = py_flat_format_new
};
return &py_flat_format_type;
}
/******************************************************************************
* *
* Paramètres : module = module dont la définition est à compléter. *
* *
* Description : Prend en charge l'objet 'pychrysalide.format.FlatFormat'. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool ensure_python_flat_format_is_registered(void)
{
PyTypeObject *type; /* Type Python 'FlatFormat' */
PyObject *module; /* Module à recompléter */
PyObject *dict; /* Dictionnaire du module */
type = get_python_flat_format_type();
if (!PyType_HasFeature(type, Py_TPFLAGS_READY))
{
module = get_access_to_python_module("pychrysalide.format");
dict = PyModule_GetDict(module);
if (!ensure_python_executable_format_is_registered())
return false;
if (!register_class_for_pygobject(dict, G_TYPE_FLAT_FORMAT, type, get_python_executable_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 à plat. *
* *
* Retour : Bilan de l'opération, voire indications supplémentaires. *
* *
* Remarques : - *
* *
******************************************************************************/
int convert_to_flat_format(PyObject *arg, void *dst)
{
int result; /* Bilan à retourner */
result = PyObject_IsInstance(arg, (PyObject *)get_python_flat_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 flat format");
break;
case 1:
*((GFlatFormat **)dst) = G_FLAT_FORMAT(pygobject_get(arg));
break;
default:
assert(false);
break;
}
return result;
}
|
