329 lines
8.1 KiB
C
329 lines
8.1 KiB
C
/**
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* @file connection.c
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*
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* @brief Implementation of connection_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <string.h>
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#include "connection.h"
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#include <utils/linked_list.h>
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#include <utils/logger.h>
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/**
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* String mappings for auth_method_t.
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*/
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mapping_t auth_method_m[] = {
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{RSA_DIGITAL_SIGNATURE, "RSA"},
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{SHARED_KEY_MESSAGE_INTEGRITY_CODE, "SHARED_KEY"},
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{DSS_DIGITAL_SIGNATURE, "DSS"},
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{MAPPING_END, NULL}
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};
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typedef struct private_connection_t private_connection_t;
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/**
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* Private data of an connection_t object
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*/
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struct private_connection_t {
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/**
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* Public part
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*/
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connection_t public;
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/**
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* Name of the connection
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*/
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char *name;
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/**
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* Does charon handle this connection? Or can he ignore it?
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*/
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bool ikev2;
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/**
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* Host information of my host.
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*/
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host_t *my_host;
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/**
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* Host information of other host.
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*/
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host_t *other_host;
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/**
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* Method to use for own authentication data
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*/
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auth_method_t auth_method;
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/**
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* Supported proposals
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*/
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linked_list_t *proposals;
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};
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/**
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* Implementation of connection_t.get_name.
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*/
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static char *get_name (private_connection_t *this)
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{
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return this->name;
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}
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/**
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* Implementation of connection_t.is_ikev2.
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*/
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static bool is_ikev2 (private_connection_t *this)
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{
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return this->ikev2;
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}
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/**
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* Implementation of connection_t.get_my_host.
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*/
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static host_t *get_my_host (private_connection_t *this)
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{
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return this->my_host;
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}
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/**
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* Implementation of connection_t.get_other_host.
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*/
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static host_t *get_other_host (private_connection_t *this)
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{
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return this->other_host;
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}
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/**
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* Implementation of connection_t.update_my_host.
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*/
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static void update_my_host(private_connection_t *this, host_t *my_host)
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{
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this->my_host->destroy(this->my_host);
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this->my_host = my_host;
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}
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/**
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* Implementation of connection_t.update_other_host.
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*/
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static void update_other_host(private_connection_t *this, host_t *other_host)
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{
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this->other_host->destroy(this->other_host);
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this->other_host = other_host;
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}
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/**
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* Implementation of connection_t.get_proposals.
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*/
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static linked_list_t* get_proposals(private_connection_t *this)
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{
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return this->proposals;
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}
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/**
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* Implementation of connection_t.select_proposal.
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*/
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static proposal_t *select_proposal(private_connection_t *this, linked_list_t *proposals)
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{
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iterator_t *stored_iter, *supplied_iter;
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proposal_t *stored, *supplied, *selected;
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stored_iter = this->proposals->create_iterator(this->proposals, TRUE);
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supplied_iter = proposals->create_iterator(proposals, TRUE);
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/* compare all stored proposals with all supplied. Stored ones are preferred. */
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while (stored_iter->has_next(stored_iter))
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{
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supplied_iter->reset(supplied_iter);
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stored_iter->current(stored_iter, (void**)&stored);
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while (supplied_iter->has_next(supplied_iter))
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{
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supplied_iter->current(supplied_iter, (void**)&supplied);
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selected = stored->select(stored, supplied);
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if (selected)
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{
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/* they match, return */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return selected;
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}
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}
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}
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/* no proposal match :-(, will result in a NO_PROPOSAL_CHOSEN... */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return NULL;
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}
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/**
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* Implementation of connection_t.add_proposal.
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*/
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static void add_proposal(private_connection_t *this, proposal_t *proposal)
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{
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this->proposals->insert_last(this->proposals, proposal);
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}
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/**
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* Implementation of connection_t.auth_method_t.
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*/
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static auth_method_t get_auth_method(private_connection_t *this)
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{
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return this->auth_method;
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}
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/**
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* Implementation of connection_t.get_dh_group.
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*/
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static diffie_hellman_group_t get_dh_group(private_connection_t *this)
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{
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iterator_t *iterator;
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proposal_t *proposal;
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algorithm_t *algo;
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iterator = this->proposals->create_iterator(this->proposals, TRUE);
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while (iterator->has_next(iterator))
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{
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iterator->current(iterator, (void**)&proposal);
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proposal->get_algorithm(proposal, DIFFIE_HELLMAN_GROUP, &algo);
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if (algo)
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{
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iterator->destroy(iterator);
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return algo->algorithm;
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}
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}
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iterator->destroy(iterator);
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return MODP_UNDEFINED;
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}
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/**
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* Implementation of connection_t.check_dh_group.
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*/
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static bool check_dh_group(private_connection_t *this, diffie_hellman_group_t dh_group)
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{
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iterator_t *prop_iter, *alg_iter;
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proposal_t *proposal;
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algorithm_t *algo;
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prop_iter = this->proposals->create_iterator(this->proposals, TRUE);
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while (prop_iter->has_next(prop_iter))
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{
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prop_iter->current(prop_iter, (void**)&proposal);
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alg_iter = proposal->create_algorithm_iterator(proposal, DIFFIE_HELLMAN_GROUP);
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while (alg_iter->has_next(alg_iter))
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{
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alg_iter->current(alg_iter, (void**)&algo);
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if (algo->algorithm == dh_group)
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{
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prop_iter->destroy(prop_iter);
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alg_iter->destroy(alg_iter);
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return TRUE;
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}
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}
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}
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prop_iter->destroy(prop_iter);
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alg_iter->destroy(alg_iter);
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return FALSE;
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}
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/**
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* Implementation of connection_t.clone.
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*/
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static connection_t *clone(private_connection_t *this)
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{
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iterator_t *iterator;
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proposal_t *proposal;
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private_connection_t *clone = (private_connection_t*)connection_create(
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this->name,
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this->ikev2,
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this->my_host->clone(this->my_host),
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this->other_host->clone(this->other_host),
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this->auth_method);
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/* clone all proposals */
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iterator = this->proposals->create_iterator(this->proposals, TRUE);
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while (iterator->has_next(iterator))
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{
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iterator->current(iterator, (void**)&proposal);
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proposal = proposal->clone(proposal);
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clone->proposals->insert_last(clone->proposals, (void*)proposal);
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}
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iterator->destroy(iterator);
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return &clone->public;
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}
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/**
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* Implementation of connection_t.destroy.
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*/
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static void destroy(private_connection_t *this)
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{
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proposal_t *proposal;
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while (this->proposals->remove_last(this->proposals, (void**)&proposal) == SUCCESS)
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{
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proposal->destroy(proposal);
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}
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this->proposals->destroy(this->proposals);
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this->my_host->destroy(this->my_host);
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this->other_host->destroy(this->other_host);
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free(this->name);
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free(this);
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}
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/**
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* Described in header.
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*/
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connection_t * connection_create(char *name, bool ikev2, host_t *my_host, host_t *other_host, auth_method_t auth_method)
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{
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private_connection_t *this = malloc_thing(private_connection_t);
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/* public functions */
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this->public.get_name = (char*(*)(connection_t*))get_name;
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this->public.is_ikev2 = (bool(*)(connection_t*))is_ikev2;
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this->public.get_my_host = (host_t*(*)(connection_t*))get_my_host;
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this->public.update_my_host = (void(*)(connection_t*,host_t*))update_my_host;
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this->public.update_other_host = (void(*)(connection_t*,host_t*))update_other_host;
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this->public.get_other_host = (host_t*(*)(connection_t*))get_other_host;
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this->public.get_proposals = (linked_list_t*(*)(connection_t*))get_proposals;
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this->public.select_proposal = (proposal_t*(*)(connection_t*,linked_list_t*))select_proposal;
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this->public.add_proposal = (void(*)(connection_t*, proposal_t*)) add_proposal;
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this->public.get_auth_method = (auth_method_t(*)(connection_t*)) get_auth_method;
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this->public.get_dh_group = (diffie_hellman_group_t(*)(connection_t*)) get_dh_group;
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this->public.check_dh_group = (bool(*)(connection_t*,diffie_hellman_group_t)) check_dh_group;
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this->public.clone = (connection_t*(*)(connection_t*))clone;
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this->public.destroy = (void(*)(connection_t*))destroy;
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/* private variables */
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this->name = strdup(name);
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this->ikev2 = ikev2;
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this->my_host = my_host;
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this->other_host = other_host;
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this->auth_method = auth_method;
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this->proposals = linked_list_create();
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return (&this->public);
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}
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