aesni: Provide a plugin stub for AES-NI instruction based crypto primitives

src/libstrongswan/Makefile.am

@@ -296,6 +296,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_AESNI
+  SUBDIRS += plugins/aesni
+if MONOLITHIC
+  libstrongswan_la_LIBADD += plugins/aesni/libstrongswan-aesni.la
+endif
+endif
+
 if USE_RANDOM
   SUBDIRS += plugins/random
 if MONOLITHIC

src/libstrongswan/plugins/aesni/Makefile.am

@@ -0,0 +1,16 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-aesni.la
+else
+plugin_LTLIBRARIES = libstrongswan-aesni.la
+endif
+
+libstrongswan_aesni_la_SOURCES = \
+	aesni_plugin.h aesni_plugin.c
+
+libstrongswan_aesni_la_LDFLAGS = -module -avoid-version

src/libstrongswan/plugins/aesni/aesni_plugin.c

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2015 Martin Willi
+ * Copyright (C) 2015 revosec AG
+ *
+ * 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 "aesni_plugin.h"
+
+#include <stdio.h>
+
+#include <library.h>
+#include <utils/debug.h>
+#include <utils/cpu_feature.h>
+
+typedef struct private_aesni_plugin_t private_aesni_plugin_t;
+typedef enum cpuid_feature_t cpuid_feature_t;
+
+/**
+ * private data of aesni_plugin
+ */
+struct private_aesni_plugin_t {
+
+	/**
+	 * public functions
+	 */
+	aesni_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_aesni_plugin_t *this)
+{
+	return "aesni";
+}
+
+METHOD(plugin_t, get_features, int,
+	private_aesni_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+	};
+
+	*features = f;
+	if (cpu_feature_available(CPU_FEATURE_AESNI))
+	{
+		return countof(f);
+	}
+	return 0;
+}
+
+METHOD(plugin_t, destroy, void,
+	private_aesni_plugin_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *aesni_plugin_create()
+{
+	private_aesni_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.reload = (void*)return_false,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	return &this->public.plugin;
+}

src/libstrongswan/plugins/aesni/aesni_plugin.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 Martin Willi
+ * Copyright (C) 2015 revosec AG
+ *
+ * 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 aesni_p aesni
+ * @ingroup plugins
+ *
+ * @defgroup aesni_plugin aesni_plugin
+ * @{ @ingroup aesni_p
+ */
+
+#ifndef AESNI_PLUGIN_H_
+#define AESNI_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct aesni_plugin_t aesni_plugin_t;
+
+/**
+ * Plugin providing crypto primitives based on Intel AES-NI instructions.
+ */
+struct aesni_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** AESNI_PLUGIN_H_ @}*/