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author | Martin Willi <martin@strongswan.org> | 2006-04-05 12:10:50 +0000 |
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committer | Martin Willi <martin@strongswan.org> | 2006-04-05 12:10:50 +0000 |
commit | 6862128151fb78f63685a8da5575783c426d64a7 (patch) | |
tree | 75920a6688ed5654fb917ecccc1e0e469480fd1f /Source/lib/crypto/prfs/hmac_prf.c | |
parent | 3dbbbf3e16366b0da33b29bbc1a4ba9a976e43a0 (diff) | |
download | strongswan-6862128151fb78f63685a8da5575783c426d64a7.tar.bz2 strongswan-6862128151fb78f63685a8da5575783c426d64a7.tar.xz |
../svn-commit.tmp
Diffstat (limited to 'Source/lib/crypto/prfs/hmac_prf.c')
-rw-r--r-- | Source/lib/crypto/prfs/hmac_prf.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/Source/lib/crypto/prfs/hmac_prf.c b/Source/lib/crypto/prfs/hmac_prf.c new file mode 100644 index 000000000..2ea0869f7 --- /dev/null +++ b/Source/lib/crypto/prfs/hmac_prf.c @@ -0,0 +1,118 @@ +/** + * @file hmac_prf.c + * + * @brief Implementation for hmac_prf_t. + * + */ + +/* + * Copyright (C) 2005 Jan Hutter, Martin Willi + * 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 <utils/allocator.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) +{ + allocator_free(this); + this->hmac->destroy(this->hmac); +} + +/* + * Described in header. + */ +hmac_prf_t *hmac_prf_create(hash_algorithm_t hash_algorithm) +{ + private_hmac_prf_t *this = allocator_alloc_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) + { + allocator_free(this); + return NULL; + } + + return &(this->public); +} |