files: Add simple plugin to load files from file:// URIs

configure.ac

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2014 Tobias Brunner
+# Copyright (C) 2007-2015 Tobias Brunner
 # Copyright (C) 2006-2014 Andreas Steffen
 # Copyright (C) 2006-2014 Martin Willi
 # Hochschule fuer Technik Rapperswil
@@ -159,6 +159,7 @@ ARG_DISBL_SET([sshkey],         [disable SSH key decoding plugin.])
 ARG_DISBL_SET([x509],           [disable X509 certificate implementation plugin.])
 # fetcher/resolver plugins
 ARG_ENABL_SET([curl],           [enable CURL fetcher plugin to fetch files via libcurl. Requires libcurl.])
+ARG_ENABL_SET([files],          [enable simple file:// URI fetcher.])
 ARG_ENABL_SET([ldap],           [enable LDAP fetching plugin to fetch files via libldap. Requires openLDAP.])
 ARG_ENABL_SET([soup],           [enable soup fetcher plugin to fetch from HTTP via libsoup. Requires libsoup.])
 ARG_ENABL_SET([unbound],        [enable UNBOUND resolver plugin to perform DNS queries via libunbound. Requires libldns and libunbound.])
@@ -1259,6 +1260,7 @@ ADD_PLUGIN([gcm],                  [s charon scripts nm cmd])
 ADD_PLUGIN([ntru],                 [s charon scripts nm cmd])
 ADD_PLUGIN([bliss],                [s charon pki scripts nm cmd])
 ADD_PLUGIN([curl],                 [s charon scepclient pki scripts nm cmd])
+ADD_PLUGIN([files],                [s charon scepclient pki scripts nm cmd])
 ADD_PLUGIN([winhttp],              [s charon pki scripts])
 ADD_PLUGIN([soup],                 [s charon pki scripts nm cmd])
 ADD_PLUGIN([mysql],                [s charon pool manager medsrv attest])
@@ -1362,6 +1364,7 @@ AC_SUBST(t_plugins)
 # -----------------------
 AM_CONDITIONAL(USE_TEST_VECTORS, test x$test_vectors = xtrue)
 AM_CONDITIONAL(USE_CURL, test x$curl = xtrue)
+AM_CONDITIONAL(USE_FILES, test x$files = xtrue)
 AM_CONDITIONAL(USE_WINHTTP, test x$winhttp = xtrue)
 AM_CONDITIONAL(USE_UNBOUND, test x$unbound = xtrue)
 AM_CONDITIONAL(USE_SOUP, test x$soup = xtrue)
@@ -1636,6 +1639,7 @@ AC_CONFIG_FILES([
 	src/libstrongswan/plugins/sshkey/Makefile
 	src/libstrongswan/plugins/pem/Makefile
 	src/libstrongswan/plugins/curl/Makefile
+	src/libstrongswan/plugins/files/Makefile
 	src/libstrongswan/plugins/winhttp/Makefile
 	src/libstrongswan/plugins/unbound/Makefile
 	src/libstrongswan/plugins/soup/Makefile

src/libstrongswan/Makefile.am

@@ -429,6 +429,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_FILES
+  SUBDIRS += plugins/files
+if MONOLITHIC
+  libstrongswan_la_LIBADD += plugins/files/libstrongswan-files.la
+endif
+endif
+
 if USE_WINHTTP
   SUBDIRS += plugins/winhttp
 if MONOLITHIC

src/libstrongswan/plugins/files/Makefile.am

@@ -0,0 +1,16 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-files.la
+else
+plugin_LTLIBRARIES = libstrongswan-files.la
+endif
+
+libstrongswan_files_la_SOURCES = \
+	files_plugin.h files_plugin.c files_fetcher.c files_fetcher.h
+
+libstrongswan_files_la_LDFLAGS = -module -avoid-version

src/libstrongswan/plugins/files/files_fetcher.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2015 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+#include <errno.h>
+
+#include <library.h>
+#include <utils/debug.h>
+
+#include "files_fetcher.h"
+
+typedef struct private_files_fetcher_t private_files_fetcher_t;
+
+/**
+ * private data of a files_fetcher_t object.
+ */
+struct private_files_fetcher_t {
+
+	/**
+	 * Public data
+	 */
+	files_fetcher_t public;
+
+	/**
+	 * Callback function
+	 */
+	fetcher_callback_t cb;
+};
+
+METHOD(fetcher_t, fetch, status_t,
+	private_files_fetcher_t *this, char *uri, void *userdata)
+{
+	chunk_t *data;
+	status_t status = FAILED;
+
+	if (this->cb == fetcher_default_callback)
+	{
+		*(chunk_t*)userdata = chunk_empty;
+	}
+	if (!strpfx(uri, "file://"))
+	{
+		return NOT_SUPPORTED;
+	}
+	uri = uri + strlen("file://");
+	data = chunk_map(uri, FALSE);
+	if (!data)
+	{
+		DBG1(DBG_LIB, "  opening '%s' failed: %s", uri, strerror(errno));
+		return FAILED;
+	}
+	if (this->cb(userdata, *data))
+	{
+		status = SUCCESS;
+	}
+	chunk_unmap(data);
+	return status;
+}
+
+METHOD(fetcher_t, set_option, bool,
+	private_files_fetcher_t *this, fetcher_option_t option, ...)
+{
+	bool supported = TRUE;
+	va_list args;
+
+	va_start(args, option);
+	switch (option)
+	{
+		case FETCH_CALLBACK:
+		{
+			this->cb = va_arg(args, fetcher_callback_t);
+			break;
+		}
+		default:
+			supported = FALSE;
+			break;
+	}
+	va_end(args);
+	return supported;
+}
+
+METHOD(fetcher_t, destroy, void,
+	private_files_fetcher_t *this)
+{
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+files_fetcher_t *files_fetcher_create()
+{
+	private_files_fetcher_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.fetch = _fetch,
+				.set_option = _set_option,
+				.destroy = _destroy,
+			},
+		},
+		.cb = fetcher_default_callback,
+	);
+
+	return &this->public;
+}

src/libstrongswan/plugins/files/files_fetcher.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+/**
+ * @defgroup files_fetcher files_fetcher
+ * @{ @ingroup files_p
+ */
+
+#ifndef FILES_FETCHER_H_
+#define FILES_FETCHER_H_
+
+typedef struct files_fetcher_t files_fetcher_t;
+
+/**
+ * Fetcher implementation loading local files
+ */
+struct files_fetcher_t {
+
+	/**
+	 * Implements fetcher interface
+	 */
+	fetcher_t interface;
+};
+
+/**
+ * Create a files_fetcher instance.
+ */
+files_fetcher_t *files_fetcher_create();
+
+#endif /** FILES_FETCHER_H_ @}*/

src/libstrongswan/plugins/files/files_plugin.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2015 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+#include "files_plugin.h"
+#include "files_fetcher.h"
+
+#include <library.h>
+#include <utils/debug.h>
+
+typedef struct private_files_plugin_t private_files_plugin_t;
+
+/**
+ * private data of files_plugin
+ */
+struct private_files_plugin_t {
+
+	/**
+	 * public functions
+	 */
+	files_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_files_plugin_t *this)
+{
+	return "files";
+}
+
+METHOD(plugin_t, get_features, int,
+	private_files_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+		PLUGIN_REGISTER(FETCHER, files_fetcher_create),
+			PLUGIN_PROVIDE(FETCHER, "file://"),
+	};
+	*features = f;
+	return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+	private_files_plugin_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *files_plugin_create()
+{
+	private_files_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	return &this->public.plugin;
+}

src/libstrongswan/plugins/files/files_plugin.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+/**
+ * @defgroup files_p files
+ * @ingroup plugins
+ *
+ * @defgroup files_plugin files_plugin
+ * @{ @ingroup files_p
+ */
+
+#ifndef FILES_PLUGIN_H_
+#define FILES_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct files_plugin_t files_plugin_t;
+
+/**
+ * Plugin implementing fetcher interface loading local files directly.
+ */
+struct files_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** FILES_PLUGIN_H_ @}*/