Add sshkey plugin stub that will parse RFC 4253 public keys

configure.in

@@ -130,6 +130,7 @@ ARG_DISBL_SET([pkcs7],          [disable PKCS7 container support plugin.])
 ARG_DISBL_SET([pkcs8],          [disable PKCS8 private key decoding plugin.])
 ARG_DISBL_SET([pgp],            [disable PGP key decoding plugin.])
 ARG_DISBL_SET([dnskey],         [disable DNS RR key decoding plugin.])
+ARG_DISBL_SET([sshkey],         [disable SSH key decoding plugin.])
 ARG_ENABL_SET([ipseckey],       [enable IPSECKEY authentication plugin.])
 ARG_DISBL_SET([pem],            [disable PEM decoding plugin.])
 ARG_DISBL_SET([hmac],           [disable HMAC crypto implementation plugin.])
@@ -967,6 +968,7 @@ ADD_PLUGIN([pkcs7],                [s scepclient pki])
 ADD_PLUGIN([pkcs8],                [s charon openac scepclient pki scripts manager medsrv attest nm cmd])
 ADD_PLUGIN([pgp],                  [s charon])
 ADD_PLUGIN([dnskey],               [s charon])
+ADD_PLUGIN([sshkey],               [s charon])
 ADD_PLUGIN([ipseckey],             [c charon])
 ADD_PLUGIN([pem],                  [s charon openac scepclient pki scripts manager medsrv attest nm cmd])
 ADD_PLUGIN([padlock],              [s charon])
@@ -1097,6 +1099,7 @@ AM_CONDITIONAL(USE_PKCS7, test x$pkcs7 = xtrue)
 AM_CONDITIONAL(USE_PKCS8, test x$pkcs8 = xtrue)
 AM_CONDITIONAL(USE_PGP, test x$pgp = xtrue)
 AM_CONDITIONAL(USE_DNSKEY, test x$dnskey = xtrue)
+AM_CONDITIONAL(USE_SSHKEY, test x$sshkey = xtrue)
 AM_CONDITIONAL(USE_PEM, test x$pem = xtrue)
 AM_CONDITIONAL(USE_HMAC, test x$hmac = xtrue)
 AM_CONDITIONAL(USE_CMAC, test x$cmac = xtrue)
@@ -1291,6 +1294,7 @@ AC_CONFIG_FILES([
 	src/libstrongswan/plugins/pkcs8/Makefile
 	src/libstrongswan/plugins/pgp/Makefile
 	src/libstrongswan/plugins/dnskey/Makefile
+	src/libstrongswan/plugins/sshkey/Makefile
 	src/libstrongswan/plugins/pem/Makefile
 	src/libstrongswan/plugins/curl/Makefile
 	src/libstrongswan/plugins/unbound/Makefile

src/libstrongswan/Makefile.am

@@ -315,6 +315,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_SSHKEY
+  SUBDIRS += plugins/sshkey
+if MONOLITHIC
+  libstrongswan_la_LIBADD += plugins/sshkey/libstrongswan-sshkey.la
+endif
+endif
+
 if USE_PEM
   SUBDIRS += plugins/pem
 if MONOLITHIC

src/libstrongswan/plugins/sshkey/Makefile.am

@@ -0,0 +1,15 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan
+
+AM_CFLAGS = -rdynamic
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-sshkey.la
+else
+plugin_LTLIBRARIES = libstrongswan-sshkey.la
+endif
+
+libstrongswan_sshkey_la_SOURCES = \
+	sshkey_plugin.h sshkey_plugin.c
+
+libstrongswan_sshkey_la_LDFLAGS = -module -avoid-version

src/libstrongswan/plugins/sshkey/sshkey_plugin.c

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2013 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 "sshkey_plugin.h"
+
+#include <library.h>
+
+typedef struct private_sshkey_plugin_t private_sshkey_plugin_t;
+
+/**
+ * private data of sshkey_plugin
+ */
+struct private_sshkey_plugin_t {
+
+	/**
+	 * public functions
+	 */
+	sshkey_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_sshkey_plugin_t *this)
+{
+	return "sshkey";
+}
+
+METHOD(plugin_t, get_features, int,
+	private_sshkey_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+	};
+	*features = f;
+	return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+	private_sshkey_plugin_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *sshkey_plugin_create()
+{
+	private_sshkey_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	return &this->public.plugin;
+}

src/libstrongswan/plugins/sshkey/sshkey_plugin.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2013 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 sshkey_p sshkey
+ * @ingroup plugins
+ *
+ * @defgroup sshkey_plugin sshkey_plugin
+ * @{ @ingroup sshkey_p
+ */
+
+#ifndef SSHKEY_PLUGIN_H_
+#define SSHKEY_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct sshkey_plugin_t sshkey_plugin_t;
+
+/**
+ * Plugin providing RFC 4253 public key decoding functions.
+ */
+struct sshkey_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** SSHKEY_PLUGIN_H_ @}*/