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authorRene Mayrhofer <rene@mayrhofer.eu.org>2007-04-12 20:41:31 +0000
committerRene Mayrhofer <rene@mayrhofer.eu.org>2007-04-12 20:41:31 +0000
commit774a362e87feab25f1be16fbca08269ddc7121a4 (patch)
treecf71f4e7466468ac3edc2127125f333224a9acfb /src/libstrongswan/crypto/prfs/hmac_prf.c
parentc54a140a445bfe7aa66721f68bb0781f26add91c (diff)
downloadvyos-strongswan-774a362e87feab25f1be16fbca08269ddc7121a4.tar.gz
vyos-strongswan-774a362e87feab25f1be16fbca08269ddc7121a4.zip
Major new upstream release, just ran svn-upgrade for now (and wrote some
debian/changelong entries).
Diffstat (limited to 'src/libstrongswan/crypto/prfs/hmac_prf.c')
-rw-r--r--src/libstrongswan/crypto/prfs/hmac_prf.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/src/libstrongswan/crypto/prfs/hmac_prf.c b/src/libstrongswan/crypto/prfs/hmac_prf.c
new file mode 100644
index 000000000..f315f880d
--- /dev/null
+++ b/src/libstrongswan/crypto/prfs/hmac_prf.c
@@ -0,0 +1,118 @@
+/**
+ * @file hmac_prf.c
+ *
+ * @brief Implementation for hmac_prf_t.
+ *
+ */
+
+/*
+ * 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.
+ */
+
+#include "hmac_prf.h"
+
+#include <crypto/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(hash_algorithm_t hash_algorithm)
+{
+ private_hmac_prf_t *this = malloc_thing(private_hmac_prf_t);
+
+ 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;
+
+ this->hmac = hmac_create(hash_algorithm);
+ if (this->hmac == NULL)
+ {
+ free(this);
+ return NULL;
+ }
+
+ return &(this->public);
+}