save-keys: Add save-keys plugin

This plugin will export IKE_SA and CHILD_SA secret keys in the format used
by Wireshark.

It has to be loaded explicitly.

src/libcharon/Makefile.am

@@ -208,6 +208,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_SAVE_KEYS
+ SUBDIRS += plugins/save_keys
+if MONOLITHIC
+ libcharon_la_LIBADD += plugins/save_keys/libstrongswan-save-keys.la
+endif
+endif
+
 if USE_SOCKET_DEFAULT
   SUBDIRS += plugins/socket_default
 if MONOLITHIC

src/libcharon/plugins/save_keys/Makefile.am

@@ -0,0 +1,18 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-save-keys.la
+else
+plugin_LTLIBRARIES = libstrongswan-save-keys.la
+endif
+
+libstrongswan_save_keys_la_SOURCES = \
+	save_keys_plugin.h save_keys_plugin.c \
+	save_keys_listener.c save_keys_listener.h
+
+libstrongswan_save_keys_la_LDFLAGS = -module -avoid-version

src/libcharon/plugins/save_keys/save_keys_listener.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2016 Codrut Cristian Grosu ([email protected])
+ * Copyright (C) 2016 IXIA (http://www.ixiacom.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "save_keys_listener.h"
+
+typedef struct private_save_keys_listener_t private_save_keys_listener_t;
+
+/**
+ * Private data.
+ */
+struct private_save_keys_listener_t {
+
+	/**
+	 * Public interface.
+	 */
+	save_keys_listener_t public;
+};
+
+METHOD(save_keys_listener_t, destroy, void,
+	private_save_keys_listener_t *this)
+{
+	free(this);
+}
+
+/**
+ * See header.
+ */
+save_keys_listener_t *save_keys_listener_create()
+{
+	private_save_keys_listener_t *this;
+
+	INIT(this,
+		.public = {
+			.listener = {
+			},
+			.destroy = _destroy,
+		},
+	);
+	return &this->public;
+}

src/libcharon/plugins/save_keys/save_keys_listener.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2016 Codrut Cristian Grosu ([email protected])
+ * Copyright (C) 2016 IXIA (http://www.ixiacom.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * @defgroup save_keys_listener save_keys_listener
+ * @{ @ingroup save_keys
+ */
+
+#ifndef SAVE_KEYS_LISTENER_H_
+#define SAVE_KEYS_LISTENER_H_
+
+#include <bus/listeners/listener.h>
+
+typedef struct save_keys_listener_t save_keys_listener_t;
+
+/**
+ * Listener saving derived IKE and ESP keys.
+ */
+struct save_keys_listener_t {
+
+	/**
+	 * Implements listener_t interface.
+	 */
+	listener_t listener;
+
+	/**
+	 * Destroy this instance.
+	 */
+	void (*destroy)(save_keys_listener_t *this);
+};
+
+/**
+ * Create a save_keys_listener_t instance.
+ */
+save_keys_listener_t *save_keys_listener_create();
+
+#endif /** SAVE_KEYS_LISTENER_H_ @}*/

src/libcharon/plugins/save_keys/save_keys_plugin.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2016 Codrut Cristian Grosu ([email protected])
+ * Copyright (C) 2016 IXIA (http://www.ixiacom.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "save_keys_plugin.h"
+#include "save_keys_listener.h"
+
+#include <daemon.h>
+
+typedef struct private_save_keys_plugin_t private_save_keys_plugin_t;
+
+/**
+ * Private data.
+ */
+struct private_save_keys_plugin_t {
+
+	/**
+	 * Implements plugin interface.
+	 */
+	save_keys_plugin_t public;
+
+	/**
+	 * Listener saving keys to file.
+	 */
+	save_keys_listener_t *listener;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_save_keys_plugin_t *this)
+{
+	return "save-keys";
+}
+
+/**
+ * Register listener.
+ */
+static bool plugin_cb(private_save_keys_plugin_t *this,
+					plugin_feature_t *feature, bool reg, void *cb_data)
+{
+	if (reg)
+	{
+		charon->bus->add_listener(charon->bus, &this->listener->listener);
+	}
+	else
+	{
+		charon->bus->remove_listener(charon->bus, &this->listener->listener);
+	}
+	return TRUE;
+}
+
+METHOD(plugin_t, get_features, int,
+	private_save_keys_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+		PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
+			PLUGIN_PROVIDE(CUSTOM, "save-keys"),
+	};
+	*features = f;
+	return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+	private_save_keys_plugin_t *this)
+{
+	this->listener->destroy(this->listener);
+	free(this);
+}
+
+/**
+ * Plugin constructor.
+ */
+plugin_t *save_keys_plugin_create()
+{
+	private_save_keys_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.destroy = _destroy,
+			},
+		},
+		.listener = save_keys_listener_create(),
+	);
+
+	return &this->public.plugin;
+}

src/libcharon/plugins/save_keys/save_keys_plugin.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016 Codrut Cristian Grosu ([email protected])
+ * Copyright (C) 2016 IXIA (http://www.ixiacom.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * @defgroup save_keys save_keys
+ * @ingroup cplugins
+ *
+ * @defgroup save_keys_plugin save_keys_plugin
+ * @{ @ingroup save_keys
+ */
+
+#ifndef SAVE_KEYS_PLUGIN_H_
+#define SAVE_KEYS_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct save_keys_plugin_t save_keys_plugin_t;
+
+/**
+ * Plugin that saves derived IKE and ESP keys.
+ */
+struct save_keys_plugin_t {
+
+	/**
+	 * Implements plugin interface.
+	 */
+	plugin_t plugin;
+};
+
+#endif /** SAVE_KEYS_PLUGIN_H_ @}*/