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author | Martin Willi <martin@strongswan.org> | 2005-11-21 16:26:36 +0000 |
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committer | Martin Willi <martin@strongswan.org> | 2005-11-21 16:26:36 +0000 |
commit | f0d14d2c566d4ef22c75ba2f7fdf1e49b8cb7df2 (patch) | |
tree | 289e0a1d7530f84d6fb1979667c46122cfedf652 /Source/charon/transforms/hashers/hasher.h | |
parent | e0d609397696d778688ac8965c3a3b566f729e22 (diff) | |
download | strongswan-f0d14d2c566d4ef22c75ba2f7fdf1e49b8cb7df2.tar.bz2 strongswan-f0d14d2c566d4ef22c75ba2f7fdf1e49b8cb7df2.tar.xz |
- skeletons for:
- prf
- prf_hmac_sha1
- hasher
- hasher_sha1
Diffstat (limited to 'Source/charon/transforms/hashers/hasher.h')
-rw-r--r-- | Source/charon/transforms/hashers/hasher.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/Source/charon/transforms/hashers/hasher.h b/Source/charon/transforms/hashers/hasher.h new file mode 100644 index 000000000..24286782d --- /dev/null +++ b/Source/charon/transforms/hashers/hasher.h @@ -0,0 +1,97 @@ +/** + * @file hasher.h + * + * @brief Generic interface for hash functions + * + */ + +/* + * 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. + */ + +#ifndef HASHER_H_ +#define HASHER_H_ + + +#include "../../types.h" + +/** + * algorithms to use for hashing + */ +typedef enum hash_algorithm_e hash_algorithm_t; + +enum hash_algorithm_e { + SHA1, + MD5 +}; + + +/** + * Object representing a hasher + */ +typedef struct hasher_s hasher_t; + +struct hasher_s { + /** + * @brief hash data and write it in the buffer + * + * @param this calling hasher + * @param data data to hash + * @param [out]buffer pointer where the hash will be written + * @return + * - SUCCESS in any case + */ + status_t (*get_hash) (hasher_t *this, chunk_t data, u_int8_t *buffer); + + /** + * @brief hash data and allocate space for the hash + * + * @param this calling hasher + * @param seed a chunk containing the seed for the next bytes + * @param [out]hash chunk which will hold allocated hash + * @return + * - SUCCESS in any case + * - OUT_OF_RES if space could not be allocated + */ + status_t (*allocate_hash) (hasher_t *this, chunk_t data, chunk_t *hash); + + /** + * @brief get the block size of this hashing function + * + * @param this calling hasher + * @return block size in bytes + */ + size_t (*get_block_size) (hasher_t *this); + + /** + * @brief Destroys a hasher object. + * + * @param this hasher_t object to destroy + * @return + * SUCCESS in any case + */ + status_t (*destroy) (hasher_t *this); +}; + +/** + * Creates a new hasher_t object + * + * @param hash_algorithm Algorithm to use for hashing + * @return + * - hasher_t if successfully + * - NULL if out of ressources + */ +hasher_t *hasher_create(hash_algorithm_t hash_algorithm); + +#endif /*HASHER_H_*/ |