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-rw-r--r--plugins/pychrysalide/common/Makefile.am1
-rw-r--r--plugins/pychrysalide/common/leb128.c384
-rw-r--r--plugins/pychrysalide/common/leb128.h45
-rw-r--r--plugins/pychrysalide/common/module.c3
4 files changed, 433 insertions, 0 deletions
diff --git a/plugins/pychrysalide/common/Makefile.am b/plugins/pychrysalide/common/Makefile.am
index 1a9e347..66e7622 100644
--- a/plugins/pychrysalide/common/Makefile.am
+++ b/plugins/pychrysalide/common/Makefile.am
@@ -4,6 +4,7 @@ noinst_LTLIBRARIES = libpychrysacommon.la
libpychrysacommon_la_SOURCES = \
bits.h bits.c \
fnv1a.h fnv1a.c \
+ leb128.h leb128.c \
module.h module.c \
packed.h packed.c \
pathname.h pathname.c
diff --git a/plugins/pychrysalide/common/leb128.c b/plugins/pychrysalide/common/leb128.c
new file mode 100644
index 0000000..49ef533
--- /dev/null
+++ b/plugins/pychrysalide/common/leb128.c
@@ -0,0 +1,384 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * leb128.c - équivalent Python du fichier "common/leb128.c"
+ *
+ * Copyright (C) 2018-2020 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 "leb128.h"
+
+
+#include <assert.h>
+#include <pygobject.h>
+
+
+#include <common/leb128.h>
+
+
+#include "packed.h"
+#include "../access.h"
+#include "../helpers.h"
+
+
+
+/* Encode un nombre non signé encodé au format LEB128. */
+static PyObject *py_leb128_pack_uleb128(PyObject *, PyObject *);
+
+/* Encode un nombre signé encodé au format LEB128. */
+static PyObject *py_leb128_pack_leb128(PyObject *, PyObject *);
+
+/* Décode un nombre non signé encodé au format LEB128. */
+static PyObject *py_leb128_unpack_uleb128(PyObject *, PyObject *);
+
+/* Décode un nombre signé encodé au format LEB128. */
+static PyObject *py_leb128_unpack_leb128(PyObject *, PyObject *);
+
+
+
+/******************************************************************************
+* *
+* Paramètres : self = objet Python concerné par l'appel. *
+* args = tampon de données à constituer. *
+* *
+* Description : Encode un nombre non signé encodé au format LEB128. *
+* *
+* Retour : Bilan de l'opération : True en cas de succès, False sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_leb128_pack_uleb128(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Valeur à retourner */
+ uleb128_t value; /* Valeur à manipuler */
+ packed_buffer *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ bool status; /* Bilan de l'opération */
+
+#define LEB128_PACK_ULEB128_METHOD PYTHON_METHOD_DEF \
+( \
+ pack_uleb128, "value, pbuf", \
+ METH_VARARGS, py_leb128, \
+ "Pack an unsigned LEB128 value into a data buffer.\n" \
+ "\n" \
+ "The *value* is an integer value. The *pbuf* argument has to" \
+ " be a pychrysalide.common.PackedBuffer instance where data" \
+ " will be appended.\n" \
+ "\n" \
+ "The returned value is the operation status: *True* for" \
+ " success, *False* for failure." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&O&", convert_to_uleb128_value, &value, convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ status = pack_uleb128(&value, pbuf);
+
+ result = status ? Py_True : Py_False;
+ Py_INCREF(result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = objet Python concerné par l'appel. *
+* args = tampon de données à constituer. *
+* *
+* Description : Encode un nombre signé encodé au format LEB128. *
+* *
+* Retour : Bilan de l'opération : True en cas de succès, False sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_leb128_pack_leb128(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Valeur à retourner */
+ leb128_t value; /* Valeur à manipuler */
+ packed_buffer *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ bool status; /* Bilan de l'opération */
+
+#define LEB128_PACK_LEB128_METHOD PYTHON_METHOD_DEF \
+( \
+ pack_leb128, "value, pbuf", \
+ METH_VARARGS, py_leb128, \
+ "Pack a signed LEB128 value into a data buffer.\n" \
+ "\n" \
+ "The *value* is an integer value. The *pbuf* argument has to" \
+ " be a pychrysalide.common.PackedBuffer instance where data" \
+ " will be appended.\n" \
+ "\n" \
+ "The returned value is the operation status: *True* for" \
+ " success, *False* for failure." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&O&", convert_to_leb128_value, &value, convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ status = pack_leb128(&value, pbuf);
+
+ result = status ? Py_True : Py_False;
+ Py_INCREF(result);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = objet Python concerné par l'appel. *
+* args = tampon de données à consulter. *
+* *
+* Description : Décode un nombre non signé encodé au format LEB128. *
+* *
+* Retour : Bilan de l'opération : true en cas de succès, false sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_leb128_unpack_uleb128(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Valeur à retourner */
+ packed_buffer *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ uleb128_t value; /* Valeur à manipuler */
+ bool status; /* Bilan de l'opération */
+
+#define LEB128_UNPACK_ULEB128_METHOD PYTHON_METHOD_DEF \
+( \
+ unpack_uleb128, "pbuf", \
+ METH_VARARGS, py_leb128, \
+ "Unpack an unsigned LEB128 value into a data buffer.\n" \
+ "\n" \
+ "The *pbuf* argument has to be a" \
+ " pychrysalide.common.PackedBuffer instance from where data" \
+ " will be read.\n" \
+ "\n" \
+ "The returned value depends on the operation status: *None*" \
+ " for failure or a integer value for success." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&", convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ status = unpack_uleb128(&value, pbuf);
+
+ if (status)
+ result = PyLong_FromUnsignedLongLong(value);
+
+ else
+ {
+ result = Py_None;
+ Py_INCREF(result);
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : self = objet Python concerné par l'appel. *
+* args = tampon de données à consulter. *
+* *
+* Description : Décode un nombre signé encodé au format LEB128. *
+* *
+* Retour : Bilan de l'opération : true en cas de succès, false sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+static PyObject *py_leb128_unpack_leb128(PyObject *self, PyObject *args)
+{
+ PyObject *result; /* Valeur à retourner */
+ packed_buffer *pbuf; /* Tampon de données à employer*/
+ int ret; /* Bilan de lecture des args. */
+ leb128_t value; /* Valeur à manipuler */
+ bool status; /* Bilan de l'opération */
+
+#define LEB128_UNPACK_LEB128_METHOD PYTHON_METHOD_DEF \
+( \
+ unpack_leb128, "pbuf", \
+ METH_VARARGS, py_leb128, \
+ "Unpack a signed LEB128 value into a data buffer.\n" \
+ "\n" \
+ "The *pbuf* argument has to be a" \
+ " pychrysalide.common.PackedBuffer instance from where data" \
+ " will be read.\n" \
+ "\n" \
+ "The returned value depends on the operation status: *None*" \
+ " for failure or a integer value for success." \
+)
+
+ ret = PyArg_ParseTuple(args, "O&", convert_to_packed_buffer, &pbuf);
+ if (!ret) return NULL;
+
+ status = unpack_leb128(&value, pbuf);
+
+ if (status)
+ result = PyLong_FromLongLong(value);
+
+ else
+ {
+ result = Py_None;
+ Py_INCREF(result);
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : - *
+* *
+* Description : Définit une extension du module 'common' à compléter. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool populate_common_module_with_leb128(void)
+{
+ bool result; /* Bilan à retourner */
+ PyObject *module; /* Module à recompléter */
+
+ static PyMethodDef py_queue_methods[] = {
+ LEB128_PACK_ULEB128_METHOD,
+ LEB128_PACK_LEB128_METHOD,
+ LEB128_UNPACK_ULEB128_METHOD,
+ LEB128_UNPACK_LEB128_METHOD,
+ { NULL }
+ };
+
+ module = get_access_to_python_module("pychrysalide.common");
+
+ result = register_python_module_methods(module, py_queue_methods);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : arg = argument quelconque à tenter de convertir. *
+* dst = destination des valeurs récupérées en cas de succès. *
+* *
+* Description : Tente de convertir en valeur LEB128 non signée. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_uleb128_value(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+ unsigned long long value; /* Valeur récupérée */
+
+ 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 ULEB128 value");
+ break;
+
+ case 1:
+ value = PyLong_AsUnsignedLongLong(arg);
+ *((uleb128_t *)dst) = value;
+ break;
+
+ default:
+ assert(false);
+ break;
+
+ }
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : arg = argument quelconque à tenter de convertir. *
+* dst = destination des valeurs récupérées en cas de succès. *
+* *
+* Description : Tente de convertir en valeur LEB128 signée. *
+* *
+* Retour : Bilan de l'opération, voire indications supplémentaires. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+int convert_to_leb128_value(PyObject *arg, void *dst)
+{
+ int result; /* Bilan à retourner */
+ long long value; /* Valeur récupérée */
+
+ 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 LEB128 value");
+ break;
+
+ case 1:
+ value = PyLong_AsLongLong(arg);
+ *((leb128_t *)dst) = value;
+ break;
+
+ default:
+ assert(false);
+ break;
+
+ }
+
+ return result;
+
+}
diff --git a/plugins/pychrysalide/common/leb128.h b/plugins/pychrysalide/common/leb128.h
new file mode 100644
index 0000000..f8b1034
--- /dev/null
+++ b/plugins/pychrysalide/common/leb128.h
@@ -0,0 +1,45 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * leb128.h - prototypes pour l'équivalent Python du fichier "common/leb128.h"
+ *
+ * Copyright (C) 2021 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_COMMON_LEB128_H
+#define _PLUGINS_PYCHRYSALIDE_COMMON_LEB128_H
+
+
+#include <Python.h>
+#include <stdbool.h>
+
+
+
+/* Définit une extension du module 'common' à compléter. */
+bool populate_common_module_with_leb128(void);
+
+/* Tente de convertir en valeur LEB128 non signée. */
+int convert_to_uleb128_value(PyObject *, void *);
+
+/* Tente de convertir en valeur LEB128 signée. */
+int convert_to_leb128_value(PyObject *, void *);
+
+
+
+#endif /* _PLUGINS_PYCHRYSALIDE_COMMON_LEB128_H */
diff --git a/plugins/pychrysalide/common/module.c b/plugins/pychrysalide/common/module.c
index 7f7cbb7..a5cf957 100644
--- a/plugins/pychrysalide/common/module.c
+++ b/plugins/pychrysalide/common/module.c
@@ -27,6 +27,7 @@
#include "bits.h"
#include "fnv1a.h"
+#include "leb128.h"
#include "packed.h"
#include "pathname.h"
#include "../helpers.h"
@@ -94,6 +95,8 @@ bool populate_common_module(void)
result = true;
+ if (result) result = populate_common_module_with_leb128();
+
if (result) result = ensure_python_bitfield_is_registered();
if (result) result = ensure_python_fnv1a_is_registered();
if (result) result = ensure_python_packed_buffer_is_registered();
generated by cgit v0.11.2-87-g4458 at 2024-12-26 06:43:21 (GMT)