diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/Makefile.am | 1 | ||||
| -rw-r--r-- | plugins/encodings/Makefile.am | 64 | ||||
| -rw-r--r-- | plugins/encodings/base64.c | 137 | ||||
| -rw-r--r-- | plugins/encodings/base64.h | 43 | ||||
| -rw-r--r-- | plugins/encodings/core.c | 89 | ||||
| -rw-r--r-- | plugins/encodings/core.h | 38 | ||||
| -rw-r--r-- | plugins/encodings/python/Makefile.am | 20 | ||||
| -rw-r--r-- | plugins/encodings/python/base64.c | 139 | ||||
| -rw-r--r-- | plugins/encodings/python/base64.h | 39 | ||||
| -rw-r--r-- | plugins/encodings/python/module.c | 87 | ||||
| -rw-r--r-- | plugins/encodings/python/module.h | 38 | ||||
| -rw-r--r-- | plugins/encodings/python/rost/Makefile.am | 14 | ||||
| -rw-r--r-- | plugins/encodings/python/rost/base64.c | 211 | ||||
| -rw-r--r-- | plugins/encodings/python/rost/base64.h | 45 | ||||
| -rw-r--r-- | plugins/encodings/python/rost/module.c | 63 | ||||
| -rw-r--r-- | plugins/encodings/python/rost/module.h | 38 | ||||
| -rw-r--r-- | plugins/encodings/rost/Makefile.am | 12 | ||||
| -rw-r--r-- | plugins/encodings/rost/base64.c | 513 | ||||
| -rw-r--r-- | plugins/encodings/rost/base64.h | 58 | ||||
| -rw-r--r-- | plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c | 6 |
20 files changed, 1652 insertions, 3 deletions
diff --git a/plugins/Makefile.am b/plugins/Makefile.am index 7ce4229..3502cf0 100644 --- a/plugins/Makefile.am +++ b/plugins/Makefile.am @@ -20,6 +20,7 @@ SUBDIRS = \ dex \ dexbnf \ dwarf \ + encodings \ elf \ fmtp \ itanium \ diff --git a/plugins/encodings/Makefile.am b/plugins/encodings/Makefile.am new file mode 100644 index 0000000..6dd71fb --- /dev/null +++ b/plugins/encodings/Makefile.am @@ -0,0 +1,64 @@ + +lib_LTLIBRARIES = libencodings.la + +libdir = $(pluginslibdir) + + +if BUILD_PYTHON_PACKAGE + +RUN_PATH = -Wl,-rpath,'$$ORIGIN/../chrysalide-libs:$$ORIGIN' + +else + +RUN_PATH = -Wl,-rpath,'$$ORIGIN' + +endif + +if BUILD_PYTHON3_BINDINGS + +PYTHON3_LIBADD = python/libencodingspython.la + +if BUILD_DISCARD_LOCAL + +if BUILD_PYTHON_PACKAGE +PYTHON3_RUN_PATH = -Wl,-rpath,'$$ORIGIN/..' +else +PYTHON3_RUN_PATH = -Wl,-rpath,'$$ORIGIN' +endif + +else + +PYTHON3_RUN_PATH = -Wl,-rpath,$(abs_top_srcdir)/plugins/pychrysalide/.libs + +endif + +PYTHON3_LDFLAGS = $(PYTHON3_RUN_PATH) -L$(top_srcdir)/plugins/pychrysalide/.libs -l:pychrysalide.so + +PYTHON3_SUBDIRS = python + +endif + + +libencodings_la_SOURCES = \ + base64.h base64.c \ + core.h core.c + +libencodings_la_LIBADD = \ + $(PYTHON3_LIBADD) \ + rost/libencodingsrost.la + +libencodings_la_CFLAGS = $(TOOLKIT_CFLAGS) $(LIBXML_CFLAGS) -I$(top_srcdir)/src + +libencodings_la_LDFLAGS = \ + -avoid-version \ + -L$(top_srcdir)/src/.libs -lchrysacore \ + -L$(top_srcdir)/plugins/pe/.libs -lpe \ + $(RUN_PATH) $(PYTHON3_LDFLAGS) + + +devdir = $(includedir)/chrysalide/$(subdir) + +dev_HEADERS = $(libencodings_la_SOURCES:%c=) + + +SUBDIRS = $(PYTHON3_SUBDIRS) rost diff --git a/plugins/encodings/base64.c b/plugins/encodings/base64.c new file mode 100644 index 0000000..61b88e0 --- /dev/null +++ b/plugins/encodings/base64.c @@ -0,0 +1,137 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.c - calculs d'encodages en base 64 + * + * 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "base64.h" + + + +/****************************************************************************** +* * +* Paramètres : input = données d'entrée à traiter. * +* output = données sortantes constituées. [OUT] * +* alphabet = alphabet d'encodage mis à disposition. * +* * +* Description : Procède à l'encodage d'un contenu en base 64. * +* * +* Retour : Bilan de l'opération : true en cas de réussite, false sinon. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool _base64_encode(const sized_binary_t *input, sized_string_t *output, const sized_string_t *alphabet) +{ + bool result; /* Bilan à retourner */ + const bin_t *src; /* Tête de lecture #1 */ + const bin_t *alpha; /* Tête de lecture #2 */ + bin_t *iter; /* Tête d'écriture */ + size_t i; /* Boucle de parcours */ + + result = (alphabet->len == 64); + if (!result) goto exit; + + /* Création du réceptacle */ + + output->len = input->len * 4 / 3; + + if (input->len % 3 != 0) + output->len++; + + output->data = malloc((output->len + 1) * sizeof(bin_t)); + + /* Encodage du corps du message */ + + src = input->static_bin_data; + alpha = alphabet->static_bin_data; + + iter = output->bin_data; + + if (input->len > 2) + for (i = 0; i < (input->len - 2); i += 3) + { + *iter++ = alpha[(src[i] >> 2) & 0x3f]; + + *iter++ = alpha[((src[i] & 0x03) << 4) | ((src[i + 1] & 0xf0) >> 4)]; + + *iter++ = alpha[((src[i + 1] & 0x0f) << 2) | ((src[i + 2] & 0xc0) >> 6)]; + + *iter++ = alpha[src[i + 2] & 0x3f]; + + } + + /* Bourrage final ? */ + + if (i < input->len) + { + *iter++ = alpha[(src[i] >> 2) & 0x3f]; + + if (i == (input->len - 1)) + { + *iter++ = alpha[((src[i] & 0x03) << 4)]; + *iter++ = '='; + } + else + { + *iter++ = alpha[((src[i] & 0x03) << 4) | ((src[i + 1] & 0xf0) >> 4)]; + *iter++ = alpha[((src[i + 1] & 0x0f) << 2)]; + } + + *iter++ = '='; + } + + *iter = 0x00; + + exit: + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : input = données d'entrée à traiter. * +* output = données sortantes constituées. [OUT] * +* * +* Description : Procède à l'encodage par défaut d'un contenu en base 64. * +* * +* Retour : Bilan de l'opération : true en cas de réussite, false sinon. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool base64_encode(const sized_binary_t *input, sized_string_t *output) +{ + bool result; /* Bilan à retourner */ + + const sized_string_t alphabet = { + .static_data = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", + .len = 64 + }; + + result = _base64_encode(input, output, &alphabet); + + return result; + +} diff --git a/plugins/encodings/base64.h b/plugins/encodings/base64.h new file mode 100644 index 0000000..64ddccd --- /dev/null +++ b/plugins/encodings/base64.h @@ -0,0 +1,43 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.h - prototypes pour les calculs d'encodages en base 64 + * + * Copyright (C) 2023 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#ifndef _PLUGINS_ENCODINGS_BASE64_H +#define _PLUGINS_ENCODINGS_BASE64_H + + +#include <stdbool.h> + + +#include <common/szstr.h> + + + +/* Procède à l'encodage d'un contenu en base 64. */ +bool _base64_encode(const sized_binary_t *, sized_string_t *, const sized_string_t *); + +/* Procède à l'encodage par défaut d'un contenu en base 64. */ +bool base64_encode(const sized_binary_t *, sized_string_t *); + + + +#endif /* _PLUGINS_ENCODINGS_BASE64_H */ diff --git a/plugins/encodings/core.c b/plugins/encodings/core.c new file mode 100644 index 0000000..2ece208 --- /dev/null +++ b/plugins/encodings/core.c @@ -0,0 +1,89 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * core.c - prototypes pour le calcul d'encodages + * + * Copyright (C) 2023 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "core.h" + + +#include <analysis/scan/core.h> +#include <plugins/self.h> + + +#ifdef INCLUDE_PYTHON3_BINDINGS +# include "python/module.h" +# include "python/rost/module.h" +#endif +#include "rost/base64.h" + + +#ifdef INCLUDE_PYTHON3_BINDINGS_ +# define PG_REQ RL("PyChrysalide") +#else +# define PG_REQ NO_REQ +#endif + + + +DEFINE_CHRYSALIDE_PLUGIN("Encodings", "Special encoding methods for binaries", + PACKAGE_VERSION, CHRYSALIDE_WEBSITE("doc/formats"), + PG_REQ, AL(PGA_PLUGIN_INIT)); + + + +/****************************************************************************** +* * +* Paramètres : plugin = greffon à manipuler. * +* * +* Description : Prend acte du chargement du greffon. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +G_MODULE_EXPORT bool chrysalide_plugin_init(GPluginModule *plugin) +{ + bool result; /* Bilan à retourner */ + GScanTokenModifier *modifier; /* Modificateur à enregistrer */ + + modifier = g_scan_base64_modifier_new(); + + result = register_scan_token_modifier(modifier); + + g_object_unref(G_OBJECT(modifier)); + + if (!result) goto exit; + +#ifdef INCLUDE_PYTHON3_BINDINGS + + result = add_encodings_module_to_python_module(); + + if (result) + result = register_encodings_rost_modifiers(); +#endif + + exit: + + return result; + +} diff --git a/plugins/encodings/core.h b/plugins/encodings/core.h new file mode 100644 index 0000000..75a6e73 --- /dev/null +++ b/plugins/encodings/core.h @@ -0,0 +1,38 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * core.h - prototypes pour le calcul d'encodages + * + * Copyright (C) 2023 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#ifndef _PLUGINS_ENCODINGS_CORE_H +#define _PLUGINS_ENCODINGS_CORE_H + + +#include <plugins/plugin.h> +#include <plugins/plugin-int.h> + + + +/* Prend acte du chargement du greffon. */ +G_MODULE_EXPORT bool chrysalide_plugin_init(GPluginModule *); + + + +#endif /* _PLUGINS_ENCODINGS_CORE_H */ diff --git a/plugins/encodings/python/Makefile.am b/plugins/encodings/python/Makefile.am new file mode 100644 index 0000000..f999f9f --- /dev/null +++ b/plugins/encodings/python/Makefile.am @@ -0,0 +1,20 @@ + +noinst_LTLIBRARIES = libencodingspython.la + +libencodingspython_la_SOURCES = \ + base64.h base64.c \ + module.h module.c + +libencodingspython_la_LIBADD = \ + rost/libencodingspythonrost.la + +libencodingspython_la_CFLAGS = $(TOOLKIT_CFLAGS) $(LIBXML_CFLAGS) $(LIBPYTHON_CFLAGS) $(LIBPYGOBJECT_CFLAGS) \ + -I$(top_srcdir)/src -DNO_IMPORT_PYGOBJECT + + +devdir = $(includedir)/chrysalide/$(subdir) + +dev_HEADERS = $(libencodingspython_la_SOURCES:%c=) + + +SUBDIRS = rost diff --git a/plugins/encodings/python/base64.c b/plugins/encodings/python/base64.c new file mode 100644 index 0000000..3bc84a2 --- /dev/null +++ b/plugins/encodings/python/base64.c @@ -0,0 +1,139 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.c - équivalent Python du fichier "plugins/encodings/base64.c" + * + * Copyright (C) 2023 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 "base64.h" + + +#include <pygobject.h> + + +#include <plugins/pychrysalide/access.h> +#include <plugins/pychrysalide/helpers.h> + + +#include "../base64.h" + + + +/* Procède à l'encodage d'un contenu en base 64. */ +static PyObject *py_encodings_base64_encode(PyObject *, PyObject *); + + + +/****************************************************************************** +* * +* Paramètres : self = objet Python concerné par l'appel. * +* args = paramètre à récupérer pour le traitement. * +* * +* Description : Procède à l'encodage d'un contenu en base 64. * +* * +* Retour : None ou données sortantes constituées. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static PyObject *py_encodings_base64_encode(PyObject *self, PyObject *args) +{ + PyObject *result; /* Valeur à retourner */ + sized_string_t alphabet; /* Alphabet de traitement ? */ + Py_ssize_t alen; /* Taille de cet alphabet */ + sized_binary_t input; /* Données à traiter */ + Py_ssize_t ilen; /* Quantité de ces données */ + int ret; /* Bilan de lecture des args. */ + sized_string_t output; /* Données encodées à exporter */ + bool status; /* Bilan de l'opération */ + +#define ENCODINGS_BASE64_ENCODE_METHOD PYTHON_METHOD_DEF \ +( \ + base64_encode, "input, /, alphabet=None", \ + METH_VARARGS, py_encodings, \ + "Encode a given content using Base64.\n" \ + "\n" \ + "The *input* argument has to be provided as bytes. The optional" \ + " *alphabet* is expected to be a 64-byte array if defined.\n" \ + "\n" \ + "The returned value is bytes or *None* in case of error." \ +) + + result = NULL; + + alphabet.data = NULL; + alen = 0; + + ret = PyArg_ParseTuple(args, "s#|s#", &input.static_data, &ilen, &alphabet.static_data, &alen); + if (!ret) goto exit; + + alphabet.len = alen; + input.len = ilen; + + if (alphabet.len > 0) + status = _base64_encode(&input, &output, &alphabet); + else + status = base64_encode(&input, &output); + + if (status) + { + result = PyBytes_FromStringAndSize(output.data, output.len); + exit_szstr(&output); + } + 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 'encodings' à compléter. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool populate_encodings_module_with_base64(PyObject *super) +{ + bool result; /* Bilan à retourner */ + + static PyMethodDef py_base64_methods[] = { + ENCODINGS_BASE64_ENCODE_METHOD, + { NULL } + }; + + result = register_python_module_methods(super, py_base64_methods); + + return result; + +} diff --git a/plugins/encodings/python/base64.h b/plugins/encodings/python/base64.h new file mode 100644 index 0000000..1e08cf6 --- /dev/null +++ b/plugins/encodings/python/base64.h @@ -0,0 +1,39 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.h - équivalent Python du fichier "plugins/encodings/base64.h" + * + * Copyright (C) 2023 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_ENCODINGS_PYTHON_BASE64_H +#define _PLUGINS_ENCODINGS_PYTHON_BASE64_H + + +#include <Python.h> +#include <stdbool.h> + + + +/* Définit une extension du module 'encodings' à compléter. */ +bool populate_encodings_module_with_base64(PyObject *); + + + +#endif /* _PLUGINS_ENCODINGS_PYTHON_BASE64_H */ diff --git a/plugins/encodings/python/module.c b/plugins/encodings/python/module.c new file mode 100644 index 0000000..454159b --- /dev/null +++ b/plugins/encodings/python/module.c @@ -0,0 +1,87 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.c - intégration du répertoire encodings en tant que module + * + * 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 "module.h" + + +#include <assert.h> +#include <Python.h> + + +#include <plugins/pychrysalide/access.h> +#include <plugins/pychrysalide/helpers.h> + + +#include "base64.h" + + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Ajoute le module 'plugins.encodings' au module Python. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool add_encodings_module_to_python_module(void) +{ + bool result; /* Bilan à retourner */ + PyObject *super; /* Module à compléter */ + PyObject *module; /* Sous-module mis en place */ + +#define PYCHRYSALIDE_PLUGINS_ENCODINGS_DOC \ + "encodings is a module providing a few implementations" \ + " of algorithms used to encode data." + + static PyModuleDef py_chrysalide_encodings_module = { + + .m_base = PyModuleDef_HEAD_INIT, + + .m_name = "pychrysalide.plugins.encodings", + .m_doc = PYCHRYSALIDE_PLUGINS_ENCODINGS_DOC, + + .m_size = -1, + + }; + + result = false; + + super = get_access_to_python_module("pychrysalide.plugins"); + + module = build_python_module(super, &py_chrysalide_encodings_module); + + result = (module != NULL); + + if (result) result = populate_encodings_module_with_base64(module); + + assert(result); + + return result; + +} diff --git a/plugins/encodings/python/module.h b/plugins/encodings/python/module.h new file mode 100644 index 0000000..e7dd812 --- /dev/null +++ b/plugins/encodings/python/module.h @@ -0,0 +1,38 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.h - prototypes pour l'intégration du répertoire encodings en tant que module + * + * 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 + */ + + +#ifndef _PLUGINS_ENCODINGS_PYTHON_MODULE_H +#define _PLUGINS_ENCODINGS_PYTHON_MODULE_H + + +#include <stdbool.h> + + + +/* Ajoute le module 'plugins.encodings' au module Python. */ +bool add_encodings_module_to_python_module(void); + + + +#endif /* _PLUGINS_ENCODINGS_PYTHON_MODULE_H */ diff --git a/plugins/encodings/python/rost/Makefile.am b/plugins/encodings/python/rost/Makefile.am new file mode 100644 index 0000000..a5a2969 --- /dev/null +++ b/plugins/encodings/python/rost/Makefile.am @@ -0,0 +1,14 @@ + +noinst_LTLIBRARIES = libencodingspythonrost.la + +libencodingspythonrost_la_SOURCES = \ + base64.h base64.c \ + module.h module.c + +libencodingspythonrost_la_CFLAGS = $(TOOLKIT_CFLAGS) $(LIBXML_CFLAGS) $(LIBPYTHON_CFLAGS) $(LIBPYGOBJECT_CFLAGS) \ + -I$(top_srcdir)/src -DNO_IMPORT_PYGOBJECT + + +devdir = $(includedir)/chrysalide-$(subdir) + +dev_HEADERS = $(libencodingspythonrost_la_SOURCES:%c=) diff --git a/plugins/encodings/python/rost/base64.c b/plugins/encodings/python/rost/base64.c new file mode 100644 index 0000000..57bba76 --- /dev/null +++ b/plugins/encodings/python/rost/base64.c @@ -0,0 +1,211 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.c - équivalent Python du fichier "plugins/encodings/rost/base64.c" + * + * Copyright (C) 2023 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 "base64.h" + + +#include <pygobject.h> + + +#include <i18n.h> +#include <plugins/pychrysalide/access.h> +#include <plugins/pychrysalide/helpers.h> +#include <plugins/pychrysalide/analysis/scan/patterns/modifier.h> + + +#include "../../rost/base64.h" + + + +CREATE_DYN_CONSTRUCTOR(scan_base64_modifier, G_TYPE_SCAN_BASE64_MODIFIER); + +/* Initialise une instance sur la base du dérivé de GObject. */ +static int py_scan_base64_modifier_init(PyObject *, PyObject *, PyObject *); + + + +/****************************************************************************** +* * +* 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_scan_base64_modifier_init(PyObject *self, PyObject *args, PyObject *kwds) +{ + int ret; /* Bilan de lecture des args. */ + +#define SCAN_BASE64_MODIFIER_DOC \ + "The *Base64Modifier* class transforms a byte pattern into its" \ + " base64 encoded form.\n" \ + "\n" \ + "Instances can be created using the following constructor:\n" \ + "\n" \ + " Base64Modifier()" + + /* Initialisation d'un objet GLib */ + + ret = forward_pygobjet_init(self); + if (ret == -1) return -1; + + return 0; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Fournit un accès à une définition de type à diffuser. * +* * +* Retour : Définition d'objet pour Python. * +* * +* Remarques : - * +* * +******************************************************************************/ + +PyTypeObject *get_python_scan_base64_modifier_type(void) +{ + static PyMethodDef py_scan_base64_modifier_methods[] = { + { NULL } + }; + + static PyGetSetDef py_scan_base64_modifier_getseters[] = { + { NULL } + }; + + static PyTypeObject py_scan_base64_modifier_type = { + + PyVarObject_HEAD_INIT(NULL, 0) + + .tp_name = "pychrysalide.analysis.scan.patterns.modifiers.Base64Modifier", + .tp_basicsize = sizeof(PyGObject), + + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + + .tp_doc = SCAN_BASE64_MODIFIER_DOC, + + .tp_methods = py_scan_base64_modifier_methods, + .tp_getset = py_scan_base64_modifier_getseters, + + .tp_init = py_scan_base64_modifier_init, + .tp_new = py_scan_base64_modifier_new, + + }; + + return &py_scan_base64_modifier_type; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Prend en charge l'objet 'pychrysalide....Base64Modifier'. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool ensure_python_scan_base64_modifier_is_registered(void) +{ + PyTypeObject *type; /* Type Python Base64Modifier */ + PyObject *module; /* Module à recompléter */ + PyObject *dict; /* Dictionnaire du module */ + + type = get_python_scan_base64_modifier_type(); + + if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) + { + module = get_access_to_python_module("pychrysalide.analysis.scan.patterns.modifiers"); + + dict = PyModule_GetDict(module); + + if (!ensure_python_scan_token_modifier_is_registered()) + return false; + + if (!register_class_for_pygobject(dict, G_TYPE_SCAN_BASE64_MODIFIER, 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 transformation par encodage en Base64. * +* * +* Retour : Bilan de l'opération, voire indications supplémentaires. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int convert_to_scan_base64_modifier(PyObject *arg, void *dst) +{ + int result; /* Bilan à retourner */ + + result = PyObject_IsInstance(arg, (PyObject *)get_python_scan_base64_modifier_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 Base64 modifier"); + break; + + case 1: + *((GScanBase64Modifier **)dst) = G_SCAN_BASE64_MODIFIER(pygobject_get(arg)); + break; + + default: + assert(false); + break; + + } + + return result; + +} diff --git a/plugins/encodings/python/rost/base64.h b/plugins/encodings/python/rost/base64.h new file mode 100644 index 0000000..c4459e9 --- /dev/null +++ b/plugins/encodings/python/rost/base64.h @@ -0,0 +1,45 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.h - équivalent Python du fichier "plugins/encodings/rost/base64.h" + * + * Copyright (C) 2023 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_ENCODINGS_PYTHON_ROST_BASE64_H +#define _PLUGINS_ENCODINGS_PYTHON_ROST_BASE64_H + + +#include <Python.h> +#include <stdbool.h> + + + +/* Fournit un accès à une définition de type à diffuser. */ +PyTypeObject *get_python_scan_base64_modifier_type(void); + +/* Prend en charge l'objet 'pychrysalide....Base64Modifier'. */ +bool ensure_python_scan_base64_modifier_is_registered(void); + +/* Tente de convertir en transformation par encodage en Base64. */ +int convert_to_scan_base64_modifier(PyObject *, void *); + + + +#endif /* _PLUGINS_ENCODINGS_PYTHON_ROST_BASE64_H */ diff --git a/plugins/encodings/python/rost/module.c b/plugins/encodings/python/rost/module.c new file mode 100644 index 0000000..6bd7187 --- /dev/null +++ b/plugins/encodings/python/rost/module.c @@ -0,0 +1,63 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.c - intégration du répertoire rost en tant que module + * + * Copyright (C) 2023 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 "module.h" + + +#include <Python.h> + + +#include <plugins/pychrysalide/access.h> +#include <plugins/pychrysalide/helpers.h> + + +#include "base64.h" + + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Intègre les modificateurs pour ROST. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool register_encodings_rost_modifiers(void) +{ + bool result; /* Bilan à retourner */ + + result = true; + + if (result) result = ensure_python_scan_base64_modifier_is_registered(); + + assert(result); + + return result; + +} diff --git a/plugins/encodings/python/rost/module.h b/plugins/encodings/python/rost/module.h new file mode 100644 index 0000000..ba021cb --- /dev/null +++ b/plugins/encodings/python/rost/module.h @@ -0,0 +1,38 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * module.h - prototypes pour l'intégration du répertoire rost en tant que module + * + * Copyright (C) 2023 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_ENCODINGS_PYTHON_ROST_MODULE_H +#define _PLUGINS_ENCODINGS_PYTHON_ROST_MODULE_H + + +#include <stdbool.h> + + + +/* Intègre les modificateurs pour ROST. */ +bool register_encodings_rost_modifiers(void); + + + +#endif /* _PLUGINS_ENCODINGS_PYTHON_ROST_MODULE_H */ diff --git a/plugins/encodings/rost/Makefile.am b/plugins/encodings/rost/Makefile.am new file mode 100644 index 0000000..efca690 --- /dev/null +++ b/plugins/encodings/rost/Makefile.am @@ -0,0 +1,12 @@ + +noinst_LTLIBRARIES = libencodingsrost.la + +libencodingsrost_la_SOURCES = \ + base64.h base64.c + +libencodingsrost_la_CFLAGS = $(TOOLKIT_CFLAGS) $(LIBXML_CFLAGS) -I$(top_srcdir)/src + + +devdir = $(includedir)/chrysalide-$(subdir) + +dev_HEADERS = $(libencodingsrost_la_SOURCES:%c=) diff --git a/plugins/encodings/rost/base64.c b/plugins/encodings/rost/base64.c new file mode 100644 index 0000000..0c5bafb --- /dev/null +++ b/plugins/encodings/rost/base64.c @@ -0,0 +1,513 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.c - transormation en encodage Base64 + * + * Copyright (C) 2023 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 Foobar. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "base64.h" + + +#include <assert.h> +#include <malloc.h> +#include <stdint.h> +#include <string.h> + + +#include <analysis/scan/patterns/modifier-int.h> + + +#include "../base64.h" + + + +/* ----------------------- RECHERCHE D'UN MOTIF DE TEXTE BRUT ----------------------- */ + + +/* Initialise la classe des transmissions en encodage Base64. */ +static void g_scan_base64_modifier_class_init(GScanBase64ModifierClass *klass); + +/* Initialise une instance de transmission en encodage Base64. */ +static void g_scan_base64_modifier_init(GScanBase64Modifier *); + +/* Supprime toutes les références externes. */ +static void g_scan_base64_modifier_dispose(GScanBase64Modifier *); + +/* Procède à la libération totale de la mémoire. */ +static void g_scan_base64_modifier_finalize(GScanBase64Modifier *); + + + +/* --------------------- IMPLEMENTATION DES FONCTIONS DE CLASSE --------------------- */ + + +/* Fournit le nom d'appel d'un modificateur pour motif. */ +static char *g_scan_base64_modifier_get_name(const GScanBase64Modifier *); + +/* Finalise l'encoddage en Base64 d'un motif transformé. */ +static void strip_base64_modifier_output(const sized_binary_t *, size_t, sized_binary_t *); + +/* Transforme une séquence d'octets pour motif de recherche. */ +static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *, const sized_binary_t *, size_t, sized_binary_t **, size_t *); + +/* Détermine si un argument est bien toléré par un modificateur. */ +static bool g_scan_base64_modifier_can_handle_arg(const GScanBase64Modifier *, const modifier_arg_t *); + +/* Transforme une séquence d'octets pour motif de recherche. */ +static bool g_scan_base64_modifier_transform_with_arg(const GScanBase64Modifier *, const sized_binary_t *, size_t, const modifier_arg_t *, sized_binary_t **, size_t *); + + + +/* ---------------------------------------------------------------------------------- */ +/* RECHERCHE D'UN MOTIF DE TEXTE BRUT */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une transormation en encodage Base64. */ +G_DEFINE_TYPE(GScanBase64Modifier, g_scan_base64_modifier, G_TYPE_SCAN_TOKEN_MODIFIER); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des transmissions en encodage Base64. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_base64_modifier_class_init(GScanBase64ModifierClass *klass) +{ + GObjectClass *object; /* Autre version de la classe */ + GScanTokenModifierClass *modifier; /* Version de classe parente */ + + object = G_OBJECT_CLASS(klass); + + object->dispose = (GObjectFinalizeFunc/* ! */)g_scan_base64_modifier_dispose; + object->finalize = (GObjectFinalizeFunc)g_scan_base64_modifier_finalize; + + modifier = G_SCAN_TOKEN_MODIFIER_CLASS(klass); + + modifier->get_name = (get_scan_modifier_name_fc)g_scan_base64_modifier_get_name; + + modifier->transform = (transform_scan_token_fc)g_scan_base64_modifier_transform; + modifier->can_handle = (can_token_modifier_handle_arg)g_scan_base64_modifier_can_handle_arg; + modifier->transform_with = (transform_scan_token_with_fc)g_scan_base64_modifier_transform_with_arg; + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = instance à initialiser. * +* * +* Description : Initialise une instance de transmission en encodage Base64. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_base64_modifier_init(GScanBase64Modifier *modifier) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_base64_modifier_dispose(GScanBase64Modifier *modifier) +{ + G_OBJECT_CLASS(g_scan_base64_modifier_parent_class)->dispose(G_OBJECT(modifier)); + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_scan_base64_modifier_finalize(GScanBase64Modifier *modifier) +{ + G_OBJECT_CLASS(g_scan_base64_modifier_parent_class)->finalize(G_OBJECT(modifier)); + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Construit un modificateur livrant des encodages en Base64. * +* * +* Retour : Mécanisme mis en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GScanTokenModifier *g_scan_base64_modifier_new(void) +{ + GScanTokenModifier *result; /* Structure à retourner */ + + result = g_object_new(G_TYPE_SCAN_BASE64_MODIFIER, NULL); + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* IMPLEMENTATION DES FONCTIONS DE CLASSE */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : modifier = modificateur à consulter. * +* * +* Description : Fournit le nom d'appel d'un modificateur pour motif. * +* * +* Retour : Désignation humaine. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static char *g_scan_base64_modifier_get_name(const GScanBase64Modifier *modifier) +{ + char *result; /* Désignation à retourner */ + + result = strdup("base64"); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : input = encodage en Base64 obtenu. * +* skip = nombre de caractères initiaux à sauter. * +* output = encodage en Base64 final à conserver. * +* * +* Description : Finalise l'encoddage en Base64 d'un motif transformé. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void strip_base64_modifier_output(const sized_binary_t *input, size_t skip, sized_binary_t *output) +{ + size_t final_len; /* Taille de représentation */ + + final_len = input->len; + + if (final_len > 0 && input->bin_data[final_len - 1] == '=') + { + while (final_len > 0 && input->bin_data[final_len - 1] == '=') + final_len--; + + final_len--; + + } + + if (skip > 0) + skip++; + + assert(final_len >= skip); + + final_len -= skip; + + output->len = final_len; + output->bin_data = malloc(final_len * sizeof(bin_t)); + + memcpy(output->bin_data, input->static_bin_data + skip, final_len); + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = modificateur à solliciter. * +* src = séquence d'octets à traiter. * +* scount = quantité de ces séquences. * +* dest = nouvelle(s) séquence(s) d'octets obtenue(s) [OUT] * +* dcount = quantité de ces séquences. * +* * +* Description : Transforme une séquence d'octets pour motif de recherche. * +* * +* Retour : Bilan de l'opération : succès ou échec. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *modifier, const sized_binary_t *src, size_t scount, sized_binary_t **dest, size_t *dcount) +{ + bool result; /* Bilan d'opération à renvoyer*/ + sized_binary_t *binary; /* Raccourci vers le stockage */ + size_t i; /* Boucle de parcours #1 */ + const sized_binary_t *_src; /* Source courante */ + sized_binary_t tmp_in; /* Manipulation des variations */ + sized_binary_t tmp_out; /* Manipulation des variations */ + + result = true; + + *dcount = scount * 3; + *dest = calloc(*dcount, sizeof(sized_binary_t)); + + binary = &(*dest)[0]; + + for (i = 0; i < scount && result; i++) + { + _src = src + i; + + tmp_in.data = malloc((_src->len + 2) * sizeof(bin_t)); + + /** + * Explications sur la définition des modifications sur les + * encodages produits : https://www.leeholmes.com/searching-for-content-in-base-64-strings/ + */ + + /* Encodage premier */ + + result = base64_encode(_src, &tmp_out); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 0, binary++); + + exit_szstr(&tmp_out); + + /* Variante 1 */ + + tmp_in.data[0] = ' '; + memcpy(&tmp_in.data[1], _src->static_bin_data, _src->len); + + tmp_in.len = _src->len + 1; + + result = base64_encode(&tmp_in, &tmp_out); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 1, binary++); + + exit_szstr(&tmp_out); + + /* Variante 2 */ + + tmp_in.data[0] = ' '; + tmp_in.data[2] = ' '; + memcpy(&tmp_in.data[2], _src->static_bin_data, _src->len); + + tmp_in.len = _src->len + 2; + + result = base64_encode(&tmp_in, &tmp_out); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 2, binary++); + + exit_szstr(&tmp_out); + + exit: + + exit_szstr(&tmp_in); + + } + + if (!result) + { + for (i = 0; i < *dcount; i++) + exit_szstr(&(*dest)[i]); + + free(*dest); + + *dcount = 0; + *dest = NULL; + + } + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = modificateur à solliciter. * +* arg = argument de personnalisation. * +* * +* Description : Détermine si un argument est bien toléré par un modificateur.* +* * +* Retour : Bilan de la consultation : support ou non. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_base64_modifier_can_handle_arg(const GScanBase64Modifier *modifier, const modifier_arg_t *arg) +{ + bool result; /* Bilan d'opération à renvoyer*/ + + switch (arg->type) + { + case MAT_STRING: + result = (arg->value.string.len == 64); + break; + + default: + result = false; + + } + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : modifier = modificateur à solliciter. * +* src = séquence d'octets à traiter. * +* scount = quantité de ces séquences. * +* arg = argument de personnalisation. * +* dest = nouvelle(s) séquence(s) d'octets obtenue(s) [OUT] * +* dcount = quantité de ces séquences. * +* * +* Description : Transforme une séquence d'octets pour motif de recherche. * +* * +* Retour : Bilan de l'opération : succès ou échec. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_scan_base64_modifier_transform_with_arg(const GScanBase64Modifier *modifier, const sized_binary_t *src, size_t scount, const modifier_arg_t *arg, sized_binary_t **dest, size_t *dcount) +{ + bool result; /* Bilan d'opération à renvoyer*/ + sized_binary_t *binary; /* Raccourci vers le stockage */ + size_t i; /* Boucle de parcours #1 */ + const sized_binary_t *_src; /* Source courante */ + sized_binary_t tmp_in; /* Manipulation des variations */ + sized_binary_t tmp_out; /* Manipulation des variations */ + + result = (arg->type == MAT_STRING); + if (!result) goto bad_arg; + + *dcount = scount * 3; + *dest = calloc(*dcount, sizeof(sized_binary_t)); + + binary = &(*dest)[0]; + + for (i = 0; i < scount && result; i++) + { + _src = src + i; + + tmp_in.data = malloc((_src->len + 2) * sizeof(bin_t)); + + /** + * Explications sur la définition des modifications sur les + * encodages produits : https://www.leeholmes.com/searching-for-content-in-base-64-strings/ + */ + + /* Encodage premier */ + + result = _base64_encode(_src, &tmp_out, &arg->value.string); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 0, binary++); + + exit_szstr(&tmp_out); + + /* Variante 1 */ + + tmp_in.data[0] = ' '; + memcpy(&tmp_in.data[1], _src->static_bin_data, _src->len); + + tmp_in.len = _src->len + 1; + + result = _base64_encode(&tmp_in, &tmp_out, &arg->value.string); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 1, binary++); + + exit_szstr(&tmp_out); + + /* Variante 2 */ + + tmp_in.data[0] = ' '; + tmp_in.data[2] = ' '; + memcpy(&tmp_in.data[2], _src->static_bin_data, _src->len); + + tmp_in.len = _src->len + 2; + + result = _base64_encode(&tmp_in, &tmp_out, &arg->value.string); + if (!result) goto exit; + + strip_base64_modifier_output(&tmp_out, 2, binary++); + + exit_szstr(&tmp_out); + + exit: + + exit_szstr(&tmp_in); + + } + + if (!result) + { + for (i = 0; i < *dcount; i++) + exit_szstr(&(*dest)[i]); + + free(*dest); + + *dcount = 0; + *dest = NULL; + + } + + bad_arg: + + return result; + +} diff --git a/plugins/encodings/rost/base64.h b/plugins/encodings/rost/base64.h new file mode 100644 index 0000000..646b945 --- /dev/null +++ b/plugins/encodings/rost/base64.h @@ -0,0 +1,58 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * base64.h - prototypes pour la transormation en encodage Base64 + * + * Copyright (C) 2023 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 Foobar. If not, see <http://www.gnu.org/licenses/>. + */ + + +#ifndef _PLUGINS_ENCODINGS_ROST_BASE64_H +#define _PLUGINS_ENCODINGS_ROST_BASE64_H + + +#include <glib-object.h> + + +#include <analysis/scan/patterns/modifier.h> + + + +#define G_TYPE_SCAN_BASE64_MODIFIER g_scan_base64_modifier_get_type() +#define G_SCAN_BASE64_MODIFIER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), G_TYPE_SCAN_BASE64_MODIFIER, GScanBase64Modifier)) +#define G_IS_SCAN_BASE64_MODIFIER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), G_TYPE_SCAN_BASE64_MODIFIER)) +#define G_SCAN_BASE64_MODIFIER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), G_TYPE_SCAN_BASE64_MODIFIER, GScanBase64ModifierClass)) +#define G_IS_SCAN_BASE64_MODIFIER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), G_TYPE_SCAN_BASE64_MODIFIER)) +#define G_SCAN_BASE64_MODIFIER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_SCAN_BASE64_MODIFIER, GScanBase64ModifierClass)) + + +/* Transormation en encodage Base64 (instance) */ +typedef GScanTokenModifier GScanBase64Modifier; + +/* Transormation en encodage Base64 (classe) */ +typedef GScanTokenModifierClass GScanBase64ModifierClass; + + +/* Indique le type défini pour une transormation en encodage Base64. */ +GType g_scan_base64_modifier_get_type(void); + +/* Construit un modificateur livrant des encodages en Base64. */ +GScanTokenModifier *g_scan_base64_modifier_new(void); + + + +#endif /* _PLUGINS_ENCODINGS_ROST_BASE64_H */ diff --git a/plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c b/plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c index 1280f2f..17a32f4 100644 --- a/plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c +++ b/plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c @@ -1,6 +1,6 @@ /* Chrysalide - Outil d'analyse de fichiers binaires - * hex.c - équivalent Python du fichier "analysis/scan/patterns/modifiers/hex.c" + * xor.c - équivalent Python du fichier "analysis/scan/patterns/modifiers/xor.c" * * Copyright (C) 2023 Cyrille Bagard * @@ -63,7 +63,7 @@ static int py_scan_xor_modifier_init(PyObject *self, PyObject *args, PyObject *k { int ret; /* Bilan de lecture des args. */ -#define SCAN_HEX_MODIFIER_DOC \ +#define SCAN_XOR_MODIFIER_DOC \ "The *XorModifier* class transforms a byte pattern by XORing bytes.\n" \ "\n" \ "Instances can be created using the following constructor:\n" \ @@ -111,7 +111,7 @@ PyTypeObject *get_python_scan_xor_modifier_type(void) .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, - .tp_doc = SCAN_HEX_MODIFIER_DOC, + .tp_doc = SCAN_XOR_MODIFIER_DOC, .tp_methods = py_scan_xor_modifier_methods, .tp_getset = py_scan_xor_modifier_getseters, |