chapoly: Provide a generic ChaCha20/Poly1305 AEAD supporting driver backends

2015-06-29 17:32:14 +02:00
parent 82f7f5882f
commit 370fb3feb0
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+/*
+ * 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 chapoly_aead chapoly_aead
+ * @{ @ingroup chapoly
+ */
+
+#ifndef CHAPOLY_AEAD_H_
+#define CHAPOLY_AEAD_H_
+
+#include <crypto/aead.h>
+
+typedef struct chapoly_aead_t chapoly_aead_t;
+
+/**
+ * ChaCha20/Poly1305 AEAD implementation.
+ *
+ * TODO-Chapoly: draft-ietf-ipsecme-chacha20-poly1305-05
+ */
+struct chapoly_aead_t {
+
+	/**
+	 * Implements aead_t interface.
+	 */
+	aead_t aead;
+};
+
+/**
+ * Create a chapoly_aead instance.
+ *
+ * @param algo			algorithm to implement, ENCR_CHACHA20_POLY1305
+ * @param key_size		key size in bytes, 32
+ * @param salt_size		size of implicit salt length, 0
+ * @return				AEAD, NULL if not supported
+ */
+chapoly_aead_t *chapoly_aead_create(encryption_algorithm_t algo,
+									size_t key_size, size_t salt_size);
+
+#endif /** CHAPOLY_AEAD_H_ @}*/