Added a counter mode wrapper plugin operating on existing CBC crypters

1 files changed, 61 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/ctr/ctr_plugin.c b/src/libstrongswan/plugins/ctr/ctr_plugin.c
new file mode 100644
index 000000000..d9ff436e2
--- /dev/null
+++ b/src/libstrongswan/plugins/ctr/ctr_plugin.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 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 "ctr_plugin.h"
+
+#include <library.h>
+
+#include "ctr_ipsec_crypter.h"
+
+typedef struct private_ctr_plugin_t private_ctr_plugin_t;
+
+/**
+ * private data of ctr_plugin
+ */
+struct private_ctr_plugin_t {
+
+	/**
+	 * public functions
+	 */
+	ctr_plugin_t public;
+};
+
+METHOD(plugin_t, destroy, void,
+	private_ctr_plugin_t *this)
+{
+	lib->crypto->remove_crypter(lib->crypto,
+					(crypter_constructor_t)ctr_ipsec_crypter_create);
+
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *ctr_plugin_create()
+{
+	private_ctr_plugin_t *this;
+
+	INIT(this,
+		.public.plugin.destroy = _destroy,
+	);
+
+	lib->crypto->add_crypter(lib->crypto, ENCR_AES_CTR,
+					(crypter_constructor_t)ctr_ipsec_crypter_create);
+	lib->crypto->add_crypter(lib->crypto, ENCR_CAMELLIA_CTR,
+					(crypter_constructor_t)ctr_ipsec_crypter_create);
+
+	return &this->public.plugin;
+}