diff options
Diffstat (limited to 'src/libstrongswan/crypto/proposal/proposal_keywords.c')
| -rw-r--r-- | src/libstrongswan/crypto/proposal/proposal_keywords.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/libstrongswan/crypto/proposal/proposal_keywords.c b/src/libstrongswan/crypto/proposal/proposal_keywords.c new file mode 100644 index 000000000..7356dc367 --- /dev/null +++ b/src/libstrongswan/crypto/proposal/proposal_keywords.c @@ -0,0 +1,146 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * 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. + */ + +/* + * Copyright (c) 2012 Nanoteq Pty Ltd + * + * 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 "proposal_keywords.h" +#include "proposal_keywords_static.h" + +#include <utils/linked_list.h> +#include <threading/rwlock.h> + +typedef struct private_proposal_keywords_t private_proposal_keywords_t; + +struct private_proposal_keywords_t { + + /** + * public interface + */ + proposal_keywords_t public; + + /** + * registered tokens, as proposal_token_t + */ + linked_list_t * tokens; + + /** + * rwlock to lock access to modules + */ + rwlock_t *lock; +}; + +/** + * Find the token object for the algorithm specified. + */ +static const proposal_token_t* find_token(private_proposal_keywords_t *this, + const char *str) +{ + proposal_token_t *token, *found = NULL; + enumerator_t *enumerator; + + this->lock->read_lock(this->lock); + enumerator = this->tokens->create_enumerator(this->tokens); + while (enumerator->enumerate(enumerator, &token)) + { + if (streq(token->name, str)) + { + found = token; + break; + } + } + enumerator->destroy(enumerator); + this->lock->unlock(this->lock); + return found; +} + +METHOD(proposal_keywords_t, get_token, const proposal_token_t*, + private_proposal_keywords_t *this, const char *str) +{ + const proposal_token_t *token = proposal_get_token_static(str, strlen(str)); + return token ?: find_token(this, str); +} + +METHOD(proposal_keywords_t, register_token, void, + private_proposal_keywords_t *this, const char *name, transform_type_t type, + u_int16_t algorithm, u_int16_t keysize) +{ + proposal_token_t *token; + + INIT(token, + .name = strdup(name), + .type = type, + .algorithm = algorithm, + .keysize = keysize, + ); + + this->lock->write_lock(this->lock); + this->tokens->insert_first(this->tokens, token); + this->lock->unlock(this->lock); +} + +METHOD(proposal_keywords_t, destroy, void, + private_proposal_keywords_t *this) +{ + proposal_token_t *token; + + while (this->tokens->remove_first(this->tokens, (void**)&token) == SUCCESS) + { + free(token->name); + free(token); + } + this->tokens->destroy(this->tokens); + this->lock->destroy(this->lock); + free(this); +} + +/* + * Described in header. + */ +proposal_keywords_t *proposal_keywords_create() +{ + private_proposal_keywords_t *this; + + INIT(this, + .public = { + .get_token = _get_token, + .register_token = _register_token, + .destroy = _destroy, + }, + .tokens = linked_list_create(), + .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), + ); + + return &this->public; +} |