diff options
Diffstat (limited to 'src/libstrongswan/plugins/botan/botan_hasher.c')
-rw-r--r-- | src/libstrongswan/plugins/botan/botan_hasher.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/botan/botan_hasher.c b/src/libstrongswan/plugins/botan/botan_hasher.c new file mode 100644 index 000000000..d574db0dc --- /dev/null +++ b/src/libstrongswan/plugins/botan/botan_hasher.c @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2018 René Korthaus + * Rohde & Schwarz Cybersecurity GmbH + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "botan_hasher.h" +#include "botan_util.h" + +#include <utils/debug.h> + +#include <botan/ffi.h> + +typedef struct private_botan_hasher_t private_botan_hasher_t; + +/** + * Private data of botan_hasher_t + */ +struct private_botan_hasher_t { + + /** + * Public part of this class. + */ + botan_hasher_t public; + + /** + * botan hash instance + */ + botan_hash_t hash; +}; + +METHOD(hasher_t, get_hash_size, size_t, + private_botan_hasher_t *this) +{ + size_t len = 0; + + if (botan_hash_output_length(this->hash, &len)) + { + return 0; + } + return len; +} + +METHOD(hasher_t, reset, bool, + private_botan_hasher_t *this) +{ + if (botan_hash_clear(this->hash)) + { + return FALSE; + } + return TRUE; +} + +METHOD(hasher_t, get_hash, bool, + private_botan_hasher_t *this, chunk_t chunk, uint8_t *hash) +{ + if (botan_hash_update(this->hash, chunk.ptr, chunk.len)) + { + return FALSE; + } + + if (hash && botan_hash_final(this->hash, hash)) + { + return FALSE; + } + return TRUE; +} + +METHOD(hasher_t, allocate_hash, bool, + private_botan_hasher_t *this, chunk_t chunk, chunk_t *hash) +{ + if (hash) + { + *hash = chunk_alloc(get_hash_size(this)); + return get_hash(this, chunk, hash->ptr); + } + return get_hash(this, chunk, NULL); +} + +METHOD(hasher_t, destroy, void, + private_botan_hasher_t *this) +{ + botan_hash_destroy(this->hash); + free(this); +} + +/* + * Described in header + */ +botan_hasher_t *botan_hasher_create(hash_algorithm_t algo) +{ + private_botan_hasher_t *this; + const char* hash_name; + + hash_name = botan_get_hash(algo); + if (!hash_name) + { + return FALSE; + } + + INIT(this, + .public = { + .hasher = { + .get_hash = _get_hash, + .allocate_hash = _allocate_hash, + .get_hash_size = _get_hash_size, + .reset = _reset, + .destroy = _destroy, + }, + }, + ); + + if (botan_hash_init(&this->hash, hash_name, 0)) + { + free(this); + return NULL; + } + return &this->public; +} |