created class init_config_t encapsulating configuration issues of
IKE_SA_INIT phase
This commit is contained in:
Jan Hutter
@@ -18,3 +18,7 @@ CONFIG_DIR= $(MAIN_DIR)config/
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OBJS+= $(BUILD_DIR)configuration_manager.o
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$(BUILD_DIR)configuration_manager.o : $(CONFIG_DIR)configuration_manager.c $(CONFIG_DIR)configuration_manager.h
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$(CC) $(CFLAGS) -c -o $@ $<
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OBJS+= $(BUILD_DIR)init_config.o
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$(BUILD_DIR)init_config.o : $(CONFIG_DIR)init_config.c $(CONFIG_DIR)init_config.h
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$(CC) $(CFLAGS) -c -o $@ $<
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@@ -0,0 +1,210 @@
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/**
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* @file init_config.c
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*
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* @brief Implementation of init_config_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 "init_config.h"
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#include <utils/allocator.h>
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#include <utils/linked_list.h>
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typedef struct private_init_config_t private_init_config_t;
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/**
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* Private data of an init_config_t object
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*/
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struct private_init_config_t {
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/**
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* Public part
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*/
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init_config_t public;
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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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* 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 init_config_t.get_my_host.
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*/
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static host_t * get_my_host (private_init_config_t *this)
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{
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return this->my_host->clone(this->my_host);
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}
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/**
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* Implementation of init_config_t.get_other_host.
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*/
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static host_t * get_other_host (private_init_config_t *this)
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{
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return this->other_host->clone(this->other_host);
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}
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/**
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* Implementation of init_config_t.get_dh_group_number.
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*/
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static diffie_hellman_group_t get_dh_group_number (private_init_config_t *this,size_t priority)
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{
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ike_proposal_t *ike_proposal;
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if ((this->proposals->get_count(this->proposals) == 0) || (this->proposals->get_count(this->proposals) < priority))
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{
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return MODP_UNDEFINED;
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}
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this->proposals->get_at_position(this->proposals,(priority -1),(void **) &ike_proposal);
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return (ike_proposal->diffie_hellman_group);
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}
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/**
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* Implementation of init_config_t.get_proposals.
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*/
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static size_t get_proposals (private_init_config_t *this,ike_proposal_t **proposals)
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{
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iterator_t *iterator;
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ike_proposal_t *current_proposal;
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int i = 0;
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ike_proposal_t *proposal_array;
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proposal_array = allocator_alloc(this->proposals->get_count(this->proposals) * sizeof(ike_proposal_t));
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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 **) ¤t_proposal);
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proposal_array[i] = (*current_proposal);
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i++;
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}
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iterator->destroy(iterator);
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*proposals = proposal_array;
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return this->proposals->get_count(this->proposals);
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}
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/**
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* Implementation of init_config_t.select_proposal.
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*/
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static status_t select_proposal (private_init_config_t *this, ike_proposal_t *proposals, size_t proposal_count, ike_proposal_t *selected_proposal)
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{
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iterator_t * my_iterator;
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int i;
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ike_proposal_t *my_current_proposal;
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my_iterator = this->proposals->create_iterator(this->proposals,TRUE);
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for (i = 0; i < proposal_count; i++)
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{
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my_iterator->reset(my_iterator);
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while (my_iterator->has_next(my_iterator))
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{
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my_iterator->current(my_iterator,(void **) &my_current_proposal);
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if (memcmp(my_current_proposal,&proposals[i],sizeof(ike_proposal_t)) == 0)
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{
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/* found a matching proposal */
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*selected_proposal = *my_current_proposal;
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my_iterator->destroy(my_iterator);
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return SUCCESS;
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}
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}
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}
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my_iterator->destroy(my_iterator);
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return NOT_FOUND;
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}
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/**
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* Implementation of init_config_t.destroy.
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*/
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static void add_proposal (private_init_config_t *this,size_t priority, ike_proposal_t proposal)
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{
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ike_proposal_t * new_proposal = allocator_alloc(sizeof(ike_proposal_t));
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*new_proposal = proposal;
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if (priority > this->proposals->get_count(this->proposals))
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{
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this->proposals->insert_last(this->proposals,new_proposal);
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return;
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}
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this->proposals->insert_at_position(this->proposals,(priority - 1),new_proposal);
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}
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/**
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* Implementation of init_config_t.destroy.
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*/
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static void destroy (private_init_config_t *this)
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{
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ike_proposal_t *proposal;
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while (this->proposals->get_count(this->proposals) > 0)
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{
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this->proposals->remove_first(this->proposals,(void **) &proposal);
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allocator_free(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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allocator_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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init_config_t * init_config_create(char * my_ip, char *other_ip, u_int16_t my_port, u_int16_t other_port)
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{
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private_init_config_t *this = allocator_alloc_thing(private_init_config_t);
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/* public functions */
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this->public.get_my_host = (host_t*(*)(init_config_t*))get_my_host;
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this->public.get_other_host = (host_t*(*)(init_config_t*))get_other_host;
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this->public.get_dh_group_number = (diffie_hellman_group_t (*)(init_config_t*,size_t))get_dh_group_number;
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this->public.get_proposals = (size_t(*)(init_config_t*,ike_proposal_t**))get_proposals;
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this->public.select_proposal = (status_t(*)(init_config_t*,ike_proposal_t*,size_t,ike_proposal_t*))select_proposal;
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this->public.add_proposal = (void(*)(init_config_t*, size_t, ike_proposal_t)) add_proposal;
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this->public.destroy = (void(*)(init_config_t*))destroy;
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/* private variables */
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this->my_host = host_create(AF_INET,my_ip, my_port);
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this->other_host = host_create(AF_INET,other_ip, other_port);
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this->proposals = linked_list_create();
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return (&this->public);
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}
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@@ -1,4 +1,169 @@
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/**
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* @file init_config.h
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*
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* @brief Interface of init_config_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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#ifndef _INIT_CONFIG_H_
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#define _INIT_CONFIG_H_
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#include <types.h>
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#include <network/host.h>
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#include <encoding/payloads/sa_payload.h>
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#include <utils/iterator.h>
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typedef struct ike_proposal_t ike_proposal_t;
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/**
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* Represents a Proposal used in IKE_SA_INIT phase.
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*/
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struct ike_proposal_t {
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/**
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* Encryption algorithm.
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* */
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encryption_algorithm_t encryption_algorithm;
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/**
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* Key length of encryption algorithm in bytes.
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*/
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u_int16_t encryption_algorithm_key_length;
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/**
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* Integrity algorithm.
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*/
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integrity_algorithm_t integrity_algorithm;
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/**
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* Key length of integrity algorithm
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*/
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u_int16_t integrity_algorithm_key_length;
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/**
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* Pseudo random function (prf).
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*/
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pseudo_random_function_t pseudo_random_function;
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/**
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* Key length of prf.
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*/
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u_int16_t pseudo_random_function_key_length;
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/**
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* Diffie hellman group
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*/
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diffie_hellman_group_t diffie_hellman_group;
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};
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typedef struct init_config_t init_config_t;
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/**
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* Represents a configuration class holding all needed informations for IKE_SA_INIT phase.
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*
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* @ingroup config
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*
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*/
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struct init_config_t {
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/**
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* Get my host information as host_t object.
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*
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* @warning Object is getting cloned and has to get destroyed by caller.
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*
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* @param this calling object
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* @return host information as host_t object
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*/
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host_t * (*get_my_host) (init_config_t *this);
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/**
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* Get other host information as host_t object.
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*
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* @warning Object is getting cloned and has to get destroyed by caller.
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*
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* @param this calling object
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* @return host information as host_t object
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*/
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host_t * (*get_other_host) (init_config_t *this);
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/**
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* Get the diffie hellman group to use as initiator with given priority.
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*
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*
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* @param this calling object
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* @param priority priority of dh group number (starting at 1)
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* @return diffie hellman group number for given priority or
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* MODP_UNDEFINED for not supported priorities
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*/
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diffie_hellman_group_t (*get_dh_group_number) (init_config_t *this,size_t priority);
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/**
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* Returns a list of all supported ike_proposals of type ike_proposal_t *.
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*
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* @warning array of ike_proposal_t has to get destroyed by the caller
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*
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* @param this calling object
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* @param proposals first proposal in a array
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* @return number of proposals in array
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*/
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size_t (*get_proposals) (init_config_t *this,ike_proposal_t **proposals);
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/**
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* Adds a proposal with given priority to the current stored proposals
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*
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* If allready a proposal with given priority is stored the other one is
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* moved one priority back. If priority is higher then all other stored
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* proposals, it is inserted as last one.
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*
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* @param this calling object
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* @param priority priority of adding proposal
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* @param proposal proposal to add
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*/
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void (*add_proposal) (init_config_t *this,size_t priority, ike_proposal_t proposal);
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/**
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* Select a proposed from suggested proposals.
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*
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*
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* @param this calling object
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* @param suggested_proposals first proposal in a array
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* @param proposal_count number of suggested proposals in array
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* @param selected_proposal the ike_proposal_t pointing to is set
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* @return
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* - SUCCESS if a proposal was selected
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* - NOT_FOUND if none of suggested proposals is supported
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*/
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status_t (*select_proposal) (init_config_t *this, ike_proposal_t *proposals, size_t proposal_count, ike_proposal_t *selected_proposal);
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/**
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* Destroys a init_config_t object.
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*
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* @param this calling object
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*/
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void (*destroy) (init_config_t *this);
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};
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/**
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* Creates a init_config_t object.
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*
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* @return pointer to created init_config_t object.
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*
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* @ingroup config
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*/
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init_config_t * init_config_create(char * my_ip, char *other_ip, u_int16_t my_port, u_int16_t other_port);
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#endif //_INIT_CONFIG_H_
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