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/* Chrysalide - Outil d'analyse de fichiers binaires
* rich.c - équivalent Python du fichier "plugins/bhash/rich.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 "rich.h"
#include <pygobject.h>
#include <plugins/pe/python/format.h>
#include <plugins/pychrysalide/access.h>
#include <plugins/pychrysalide/helpers.h>
#include "../rich.h"
/* Calcule la valeur pour empreinte d'en-tête PE enrichi. */
static PyObject *py_bhash_compute_pe_rich_header_checksum(PyObject *, PyObject *);
/* Calcule l'empreinte des informations d'en-tête PE enrichi. */
static PyObject *py_bhash_compute_pe_rich_header_hash(PyObject *, PyObject *);
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* args = paramètre à récupérer pour le traitement. *
* *
* Description : Calcule la valeur pour empreinte d'en-tête PE enrichi. *
* *
* Retour : None ou empreinte déterminée. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_bhash_compute_pe_rich_header_checksum(PyObject *self, PyObject *args)
{
PyObject *result; /* Valeur à retourner */
GPeFormat *format; /* Format PE à manipuler */
int ret; /* Bilan de lecture des args. */
uint32_t csum; /* Empreinte réalisée */
bool status; /* Bilan de l'opération */
#define BHASH_COMPUTE_PE_RICH_HEADER_CHECKSUM_METHOD PYTHON_METHOD_DEF \
( \
compute_pe_rich_header_checksum, "format, /", \
METH_VARARGS, py_bhash, \
"Compute the expected value for the Rich header checksum of a PE" \
" file.\n" \
"\n" \
"The *format* argument is a PE file format provided as a" \
" pychrysalide.format.pe.PeFormat instance.\n" \
"\n" \
"The returned value is a 32-bit integer value or *None* in case of" \
" error." \
)
result = NULL;
ret = PyArg_ParseTuple(args, "O&", convert_to_pe_format, &format);
if (!ret) goto exit;
status = compute_pe_rich_header_checksum(format, &csum);
if (status)
result = PyLong_FromUnsignedLong(csum);
else
{
result = Py_None;
Py_INCREF(result);
}
exit:
return result;
}
/******************************************************************************
* *
* Paramètres : self = objet Python concerné par l'appel. *
* args = paramètre à récupérer pour le traitement. *
* *
* Description : Calcule l'empreinte des informations d'en-tête PE enrichi. *
* *
* Retour : Empreinte MD5 calculée ou None en cas d'échec. *
* *
* Remarques : - *
* *
******************************************************************************/
static PyObject *py_bhash_compute_pe_rich_header_hash(PyObject *self, PyObject *args)
{
PyObject *result; /* Valeur à retourner */
int pv; /* Sélection de l'empreinte */
GPeFormat *format; /* Format PE à manipuler */
int ret; /* Bilan de lecture des args. */
char *digest; /* Empreinte calculée */
#define BHASH_COMPUTE_PE_RICH_HEADER_HASH_METHOD PYTHON_METHOD_DEF \
( \
compute_pe_rich_header_hash, "format, /, pv=True", \
METH_VARARGS, py_bhash, \
"Compute the Rich hash or the RichPV hash for a given PE format.\n" \
"\n" \
"The *format* argument is a PE file format provided as a" \
" pychrysalide.format.pe.PeFormat instance and *pv* defines the" \
" kind of hash to compute.\n" \
"\n" \
"The returned value is a MD5 digest string or *None* in case of" \
" error." \
)
result = NULL;
pv = 1;
ret = PyArg_ParseTuple(args, "O&|p", convert_to_pe_format, &format, &pv);
if (!ret) goto exit;
digest = compute_pe_rich_header_hash(format, pv);
if (digest != NULL)
{
result = PyUnicode_FromString(digest);
free(digest);
}
else
{
result = Py_None;
Py_INCREF(result);
}
exit:
return result;
}
/******************************************************************************
* *
* Paramètres : super = module dont la définition est à compléter. *
* *
* Description : Définit une extension du module 'bhash' à compléter. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool populate_bhash_module_with_rich_header(PyObject *super)
{
bool result; /* Bilan à retourner */
static PyMethodDef py_rich_header_methods[] = {
BHASH_COMPUTE_PE_RICH_HEADER_CHECKSUM_METHOD,
BHASH_COMPUTE_PE_RICH_HEADER_HASH_METHOD,
{ NULL }
};
result = register_python_module_methods(super, py_rich_header_methods);
return result;
}
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