Added a counter mode wrapper plugin operating on existing CBC crypters

1 files changed, 54 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h b/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h
new file mode 100644
index 000000000..db21aec3b
--- /dev/null
+++ b/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+/**
+ * @defgroup ctr_ipsec_crypter ctr_ipsec_crypter
+ * @{ @ingroup ctr
+ */
+
+#ifndef CTR_IPSEC_CRYPTER_H_
+#define CTR_IPSEC_CRYPTER_H_
+
+#include <crypto/crypters/crypter.h>
+
+typedef struct ctr_ipsec_crypter_t ctr_ipsec_crypter_t;
+
+/**
+ * Counter Mode wrapper for encryption algorithms, IPsec variant (RFC3686).
+ */
+struct ctr_ipsec_crypter_t {
+
+	/**
+	 * Implements crypter_t interface.
+	 */
+	crypter_t crypter;
+};
+
+/**
+ * Create a ctr_ipsec_crypter instance.
+ */
+ctr_ipsec_crypter_t *ctr_ipsec_crypter_create();
+
+/**
+ * Create a ctr_ipsec_crypter instance.
+ *
+ * @param key_size		key size in bytes
+ * @param algo			algorithm to implement, a counter mode
+ * @return				crypter, NULL if not supported
+ */
+ctr_ipsec_crypter_t *ctr_ipsec_crypter_create(encryption_algorithm_t algo,
+											  size_t key_size);
+
+#endif /** CTR_IPSEC_CRYPTER_H_ @}*/