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authorCyrille Bagard <nocbos@gmail.com>2023-10-02 07:14:50 (GMT)
committerCyrille Bagard <nocbos@gmail.com>2023-10-02 07:14:50 (GMT)
commit1b991b5c66cc44b6f93a14c1c265683074224004 (patch)
tree0f05b9daad87d85c9318fe28ef0d2f8a787b0b37
parente662be152d0b2fe0d1626a845121db5f1a51d9aa (diff)
Implement Base64 encoding for scan pattern modifications.
-rw-r--r--configure.ac4
-rw-r--r--plugins/Makefile.am1
-rw-r--r--plugins/encodings/Makefile.am64
-rw-r--r--plugins/encodings/base64.c137
-rw-r--r--plugins/encodings/base64.h43
-rw-r--r--plugins/encodings/core.c89
-rw-r--r--plugins/encodings/core.h38
-rw-r--r--plugins/encodings/python/Makefile.am20
-rw-r--r--plugins/encodings/python/base64.c139
-rw-r--r--plugins/encodings/python/base64.h39
-rw-r--r--plugins/encodings/python/module.c87
-rw-r--r--plugins/encodings/python/module.h38
-rw-r--r--plugins/encodings/python/rost/Makefile.am14
-rw-r--r--plugins/encodings/python/rost/base64.c211
-rw-r--r--plugins/encodings/python/rost/base64.h45
-rw-r--r--plugins/encodings/python/rost/module.c63
-rw-r--r--plugins/encodings/python/rost/module.h38
-rw-r--r--plugins/encodings/rost/Makefile.am12
-rw-r--r--plugins/encodings/rost/base64.c513
-rw-r--r--plugins/encodings/rost/base64.h58
-rw-r--r--plugins/pychrysalide/analysis/scan/patterns/modifiers/xor.c6
-rw-r--r--src/analysis/scan/patterns/modifiers/hex.c2
-rw-r--r--src/analysis/scan/patterns/modifiers/plain.c2
-rw-r--r--src/analysis/scan/patterns/modifiers/rev.c2
-rw-r--r--src/analysis/scan/patterns/modifiers/xor.c4
-rw-r--r--src/common/szstr.h5
-rw-r--r--tests/analysis/scan/pyapi.py14
27 files changed, 1680 insertions, 8 deletions
diff --git a/configure.ac b/configure.ac
index 9de9abd..3cf68d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -659,6 +659,10 @@ AC_CONFIG_FILES([Makefile
plugins/dwarf/v2/Makefile
plugins/dwarf/v3/Makefile
plugins/dwarf/v4/Makefile
+ plugins/encodings/Makefile
+ plugins/encodings/python/Makefile
+ plugins/encodings/python/rost/Makefile
+ plugins/encodings/rost/Makefile
plugins/elf/Makefile
plugins/elf/python/Makefile
plugins/fmtp/Makefile
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,
diff --git a/src/analysis/scan/patterns/modifiers/hex.c b/src/analysis/scan/patterns/modifiers/hex.c
index da992df..a50c67b 100644
--- a/src/analysis/scan/patterns/modifiers/hex.c
+++ b/src/analysis/scan/patterns/modifiers/hex.c
@@ -229,7 +229,7 @@ static bool g_scan_hex_modifier_transform(const GScanHexModifier *modifier, cons
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 */
+ const sized_binary_t *_src; /* Source courante */
size_t k; /* Boucle de parcours #2 */
static char *alphabet = "0123456789abcdef";
diff --git a/src/analysis/scan/patterns/modifiers/plain.c b/src/analysis/scan/patterns/modifiers/plain.c
index 485bb23..6d3ed5d 100644
--- a/src/analysis/scan/patterns/modifiers/plain.c
+++ b/src/analysis/scan/patterns/modifiers/plain.c
@@ -229,7 +229,7 @@ static bool g_scan_plain_modifier_transform(const GScanPlainModifier *modifier,
bool result; /* Bilan d'opération à renvoyer*/
sized_binary_t *binary; /* Raccourci vers le stockage */
size_t i; /* Boucle de parcours */
- const sized_binary_t *_src; /* SOurce courante */
+ const sized_binary_t *_src; /* Source courante */
result = true;
diff --git a/src/analysis/scan/patterns/modifiers/rev.c b/src/analysis/scan/patterns/modifiers/rev.c
index 8b931bd..afdf567 100644
--- a/src/analysis/scan/patterns/modifiers/rev.c
+++ b/src/analysis/scan/patterns/modifiers/rev.c
@@ -229,7 +229,7 @@ static bool g_scan_reverse_modifier_transform(const GScanReverseModifier *modifi
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 */
+ const sized_binary_t *_src; /* Source courante */
size_t k; /* Boucle de parcours #2 */
result = true;
diff --git a/src/analysis/scan/patterns/modifiers/xor.c b/src/analysis/scan/patterns/modifiers/xor.c
index 65194ab..4ec20a4 100644
--- a/src/analysis/scan/patterns/modifiers/xor.c
+++ b/src/analysis/scan/patterns/modifiers/xor.c
@@ -239,7 +239,7 @@ static bool g_scan_xor_modifier_transform(const GScanXorModifier *modifier, cons
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 */
+ const sized_binary_t *_src; /* Source courante */
long long x; /* Boucle de parcours #2 */
size_t k; /* Boucle de parcours #3 */
@@ -330,7 +330,7 @@ static bool g_scan_xor_modifier_transform_with_arg(const GScanXorModifier *modif
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 */
+ const sized_binary_t *_src; /* Source courante */
long long x; /* Boucle de parcours #2 */
size_t k; /* Boucle de parcours #3 */
diff --git a/src/common/szstr.h b/src/common/szstr.h
index aad1920..406a9f1 100644
--- a/src/common/szstr.h
+++ b/src/common/szstr.h
@@ -38,8 +38,13 @@
typedef struct _sized_string_t
{
union {
+
const char *static_data; /* Données non modifiées */
char *data; /* Chaîne de caractères */
+
+ const bin_t *static_bin_data; /* Données brutes non modifiées*/
+ bin_t *bin_data; /* Données brutes */
+
};
size_t len; /* Taille correspondante */
diff --git a/tests/analysis/scan/pyapi.py b/tests/analysis/scan/pyapi.py
index 8764074..2aaaeec 100644
--- a/tests/analysis/scan/pyapi.py
+++ b/tests/analysis/scan/pyapi.py
@@ -73,6 +73,7 @@ class TestRostPythonAPI(ChrysalideTestCase):
self.assertEqual(source, transformed[0])
+
mod = find_token_modifiers_for_name('hex')
self.assertIsNotNone(mod)
@@ -81,6 +82,7 @@ class TestRostPythonAPI(ChrysalideTestCase):
self.assertEqual(binascii.hexlify(source), transformed[0])
+
mod = find_token_modifiers_for_name('rev')
self.assertIsNotNone(mod)
@@ -90,6 +92,18 @@ class TestRostPythonAPI(ChrysalideTestCase):
self.assertEqual(source[::-1], transformed[0])
+ mod = find_token_modifiers_for_name('base64')
+ self.assertIsNotNone(mod)
+
+ source = b'ABC'
+ transformed = mod.transform(source)
+
+ self.assertEqual(len(transformed), 3)
+ self.assertEqual(transformed[0], b'QUJD')
+ self.assertEqual(transformed[1], b'FCQw')
+ self.assertEqual(transformed[2], b'BQkM')
+
+
def testBytePatternModifiersAPI(self):
"""Validate the API for pattern modifiers."""