- Updated to new upstream.

1 files changed, 137 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/hmac/hmac_prf.c b/src/libstrongswan/plugins/hmac/hmac_prf.c
new file mode 100644
index 000000000..8d843bc5a
--- /dev/null
+++ b/src/libstrongswan/plugins/hmac/hmac_prf.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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.
+ *
+ * $Id: hmac_prf.c 3488 2008-02-21 15:10:02Z martin $
+ */
+
+#include "hmac_prf.h"
+
+#include "hmac.h"
+
+
+typedef struct private_hmac_prf_t private_hmac_prf_t;
+
+/**
+ * Private data of a hma_prf_t object.
+ */
+struct private_hmac_prf_t {
+	/**
+	 * Public hmac_prf_t interface.
+	 */
+	hmac_prf_t public;	
+	
+	/**
+	 * Hmac to use for generation.
+	 */
+	hmac_t *hmac;
+};
+
+/**
+ * Implementation of prf_t.get_bytes.
+ */
+static void get_bytes(private_hmac_prf_t *this, chunk_t seed, u_int8_t *buffer)
+{
+	this->hmac->get_mac(this->hmac, seed, buffer);
+}
+
+/**
+ * Implementation of prf_t.allocate_bytes.
+ */
+static void allocate_bytes(private_hmac_prf_t *this, chunk_t seed, chunk_t *chunk)
+{
+	this->hmac->allocate_mac(this->hmac, seed, chunk);
+}
+
+/**
+ * Implementation of prf_t.get_block_size.
+ */
+static size_t get_block_size(private_hmac_prf_t *this)
+{
+	return this->hmac->get_block_size(this->hmac);
+}
+
+/**
+ * Implementation of prf_t.get_block_size.
+ */
+static size_t get_key_size(private_hmac_prf_t *this)
+{
+	/* for HMAC prfs, IKEv2 uses block size as key size */
+	return this->hmac->get_block_size(this->hmac);
+}
+
+/**
+ * Implementation of prf_t.set_key.
+ */
+static void set_key(private_hmac_prf_t *this, chunk_t key)
+{
+	this->hmac->set_key(this->hmac, key);
+}
+
+/**
+ * Implementation of prf_t.destroy.
+ */
+static void destroy(private_hmac_prf_t *this)
+{
+	this->hmac->destroy(this->hmac);
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+hmac_prf_t *hmac_prf_create(pseudo_random_function_t algo)
+{
+	private_hmac_prf_t *this;
+	hash_algorithm_t hash;
+	
+	switch (algo)
+	{
+		case PRF_HMAC_SHA1:
+			hash = HASH_SHA1;
+			break;
+		case PRF_HMAC_MD5:
+			hash = HASH_MD5;
+			break;
+		case PRF_HMAC_SHA2_256:
+			hash = HASH_SHA256;
+			break;
+		case PRF_HMAC_SHA2_384:
+			hash = HASH_SHA384;
+			break;
+		case PRF_HMAC_SHA2_512:
+			hash = HASH_SHA512;
+			break;
+		default:
+			return NULL;
+	}
+	
+	this = malloc_thing(private_hmac_prf_t);
+	this->hmac = hmac_create(hash);
+	if (this->hmac == NULL)
+	{
+		free(this);
+		return NULL;	
+	}
+	
+	this->public.prf_interface.get_bytes = (void (*) (prf_t *,chunk_t,u_int8_t*))get_bytes;
+	this->public.prf_interface.allocate_bytes = (void (*) (prf_t*,chunk_t,chunk_t*))allocate_bytes;
+	this->public.prf_interface.get_block_size = (size_t (*) (prf_t*))get_block_size;
+	this->public.prf_interface.get_key_size = (size_t (*) (prf_t*))get_key_size;
+	this->public.prf_interface.set_key = (void (*) (prf_t *,chunk_t))set_key;
+	this->public.prf_interface.destroy = (void (*) (prf_t *))destroy;
+	
+	return &(this->public);
+}
+