364 lines
11 KiB
C
364 lines
11 KiB
C
/**
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* @file initiator_init.c
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*
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* @brief Implementation of initiator_init_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 "initiator_init.h"
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#include <daemon.h>
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#include <sa/states/state.h>
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#include <sa/states/ike_sa_init_requested.h>
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#include <queues/jobs/retransmit_request_job.h>
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#include <crypto/diffie_hellman.h>
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#include <encoding/payloads/sa_payload.h>
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#include <encoding/payloads/ke_payload.h>
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#include <encoding/payloads/nonce_payload.h>
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typedef struct private_initiator_init_t private_initiator_init_t;
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/**
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* Private data of a initiator_init_t object..
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*
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*/
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struct private_initiator_init_t {
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/**
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* Methods of the state_t interface.
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*/
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initiator_init_t public;
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/**
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* Assigned IKE_SA.
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*/
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protected_ike_sa_t *ike_sa;
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/**
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* Diffie hellman object used to generate public DH value.
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* This objet is passed to the next state of type IKE_SA_INIT_REQUESTED.
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*/
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diffie_hellman_t *diffie_hellman;
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/**
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* Sent nonce.
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* This nonce is passed to the next state of type IKE_SA_INIT_REQUESTED.
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*/
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chunk_t sent_nonce;
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/**
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* Assigned logger.
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*
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* Is logger of ike_sa!
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*/
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logger_t *logger;
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/**
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* Builds the SA payload for this state.
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*
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* @param this calling object
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* @param request message_t object to add the SA payload
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*/
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void (*build_sa_payload) (private_initiator_init_t *this, message_t *request);
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/**
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* Builds the KE payload for this state.
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*
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* @param this calling object
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* @param request message_t object to add the KE payload
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*/
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void (*build_ke_payload) (private_initiator_init_t *this, message_t *request);
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/**
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* Builds the NONCE payload for this state.
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*
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* @param this calling object
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* @param request message_t object to add the NONCE payload
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*/
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status_t (*build_nonce_payload) (private_initiator_init_t *this,message_t *request);
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/**
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* Destroy function called internally of this class after state change to state
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* IKE_SA_INIT_REQUESTED succeeded.
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*
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* This destroy function does not destroy objects which were passed to the new state.
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*
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* @param this calling object
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*/
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void (*destroy_after_state_change) (private_initiator_init_t *this);
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};
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/**
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* Implementation of initiator_init_t.initiate_connection.
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*/
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static status_t initiate_connection (private_initiator_init_t *this, connection_t *connection)
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{
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policy_t *policy;
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diffie_hellman_group_t dh_group;
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host_t *my_host, *other_host;
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identification_t *my_id, *other_id;
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char *name;
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name = connection->get_name(connection);
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this->ike_sa->set_connection(this->ike_sa, connection);
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/* get policy */
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policy = charon->policies->get_policy_by_name(charon->policies, name);
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if (policy == NULL)
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{
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this->logger->log(this->logger, ERROR | LEVEL1,
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"could not get a policy named '%s', aborting", name);
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return DESTROY_ME;
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}
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this->ike_sa->set_policy(this->ike_sa, policy);
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my_host = connection->get_my_host(connection);
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other_host = connection->get_other_host(connection);
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my_id = policy->get_my_id(policy);
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other_id = policy->get_other_id(policy);
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this->logger->log(this->logger, CONTROL, "initiating connection \"%s\": %s[%s]...%s[%s]",
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name,
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my_host->get_address(my_host),
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my_id->get_string(my_id),
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other_host->get_address(other_host),
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other_id->get_string(other_id));
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/* we must guess now a DH group. For that we choose our most preferred group */
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dh_group = connection->get_dh_group(connection);
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/* next step is done in retry_initiate_connection */
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return this->public.retry_initiate_connection(&this->public, dh_group);
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}
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/**
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* Implementation of initiator_init_t.retry_initiate_connection.
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*/
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status_t retry_initiate_connection (private_initiator_init_t *this, diffie_hellman_group_t dh_group)
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{
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ike_sa_init_requested_t *next_state;
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chunk_t ike_sa_init_request_data;
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connection_t *connection;
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ike_sa_id_t *ike_sa_id;
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message_t *message;
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status_t status;
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this->diffie_hellman = diffie_hellman_create(dh_group);
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if (this->diffie_hellman == NULL)
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{
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this->logger->log(this->logger, AUDIT, "DH group %s (%d) not supported, aborting",
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mapping_find(diffie_hellman_group_m, dh_group), dh_group);
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return DESTROY_ME;
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}
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connection = this->ike_sa->get_connection(this->ike_sa);
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ike_sa_id = this->ike_sa->public.get_id(&(this->ike_sa->public));
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ike_sa_id->set_responder_spi(ike_sa_id,0);
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/* going to build message */
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this->logger->log(this->logger, CONTROL|LEVEL2, "Going to build message");
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this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, TRUE, &message);
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/* build SA payload */
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this->build_sa_payload(this, message);
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/* build KE payload */
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this->build_ke_payload(this, message);
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/* build Nonce payload */
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status = this->build_nonce_payload(this, message);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Building nonce payload failed. Aborting");
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message->destroy(message);
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return DESTROY_ME;
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}
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/* message can now be sent (must not be destroyed) */
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status = this->ike_sa->send_request(this->ike_sa, message);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, AUDIT, "Unable to initiate connection, could not send message. Aborting");
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message->destroy(message);
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return DESTROY_ME;
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}
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message = this->ike_sa->get_last_requested_message(this->ike_sa);
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ike_sa_init_request_data = message->get_packet_data(message);
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/* state can now be changed */
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this->logger->log(this->logger, CONTROL|LEVEL2, "Create next state object");
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next_state = ike_sa_init_requested_create(this->ike_sa, this->diffie_hellman, this->sent_nonce,ike_sa_init_request_data);
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this->ike_sa->set_new_state(this->ike_sa,(state_t *) next_state);
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this->logger->log(this->logger, CONTROL|LEVEL2, "Destroy old sate object");
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this->destroy_after_state_change(this);
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return SUCCESS;
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}
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/**
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* Implementation of private_initiator_init_t.build_sa_payload.
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*/
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static void build_sa_payload(private_initiator_init_t *this, message_t *request)
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{
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sa_payload_t* sa_payload;
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linked_list_t *proposal_list;
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connection_t *connection;
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this->logger->log(this->logger, CONTROL|LEVEL1, "Building SA payload");
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connection = this->ike_sa->get_connection(this->ike_sa);
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proposal_list = connection->get_proposals(connection);
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sa_payload = sa_payload_create_from_proposal_list(proposal_list);
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this->logger->log(this->logger, CONTROL|LEVEL2, "Add SA payload to message");
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request->add_payload(request, (payload_t *) sa_payload);
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}
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/**
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* Implementation of private_initiator_init_t.build_ke_payload.
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*/
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static void build_ke_payload(private_initiator_init_t *this, message_t *request)
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{
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ke_payload_t *ke_payload;
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chunk_t key_data;
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diffie_hellman_group_t dh_group;
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this->logger->log(this->logger, CONTROL|LEVEL1, "Building KE payload");
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this->diffie_hellman->get_my_public_value(this->diffie_hellman, &key_data);
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dh_group = this->diffie_hellman->get_dh_group(this->diffie_hellman);
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ke_payload = ke_payload_create();
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ke_payload->set_dh_group_number(ke_payload, dh_group);
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ke_payload->set_key_exchange_data(ke_payload, key_data);
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chunk_free(&key_data);
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this->logger->log(this->logger, CONTROL|LEVEL2, "Add KE payload to message");
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request->add_payload(request, (payload_t *) ke_payload);
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}
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/**
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* Implementation of private_initiator_init_t.build_nonce_payload.
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*/
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static status_t build_nonce_payload(private_initiator_init_t *this, message_t *request)
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{
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nonce_payload_t *nonce_payload;
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randomizer_t *randomizer;
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status_t status;
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this->logger->log(this->logger, CONTROL|LEVEL1, "Building NONCE payload");
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this->logger->log(this->logger, CONTROL|LEVEL2, "Get pseudo random bytes for NONCE");
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randomizer = this->ike_sa->get_randomizer(this->ike_sa);
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status = randomizer->allocate_pseudo_random_bytes(randomizer, NONCE_SIZE, &(this->sent_nonce));
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if (status != SUCCESS)
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{
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return status;
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}
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this->logger->log(this->logger, RAW|LEVEL2, "Initiator NONCE",&(this->sent_nonce));
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nonce_payload = nonce_payload_create();
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nonce_payload->set_nonce(nonce_payload, this->sent_nonce);
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this->logger->log(this->logger, CONTROL|LEVEL2, "Add NONCE payload to message");
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request->add_payload(request, (payload_t *) nonce_payload);
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return SUCCESS;
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}
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/**
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* Implementation of state_t.process_message.
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*/
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static status_t process_message(private_initiator_init_t *this, message_t *message)
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{
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this->logger->log(this->logger, ERROR, "In state INITIATOR_INIT, no message is processed");
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return FAILED;
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}
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/**
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* Implementation of state_t.get_state.
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*/
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static ike_sa_state_t get_state(private_initiator_init_t *this)
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{
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return INITIATOR_INIT;
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}
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/**
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* Implementation of state_t.destroy.
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*/
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static void destroy(private_initiator_init_t *this)
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{
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this->logger->log(this->logger, CONTROL | LEVEL3, "Going to destroy initiator_init_t state object");
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/* destroy diffie hellman object */
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if (this->diffie_hellman != NULL)
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{
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this->diffie_hellman->destroy(this->diffie_hellman);
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}
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if (this->sent_nonce.ptr != NULL)
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{
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free(this->sent_nonce.ptr);
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}
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free(this);
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}
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/**
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* Implementation of private_initiator_init_t.destroy_after_state_change
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*/
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static void destroy_after_state_change (private_initiator_init_t *this)
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{
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this->logger->log(this->logger, CONTROL | LEVEL3, "Going to destroy initiator_init_t state object");
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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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initiator_init_t *initiator_init_create(protected_ike_sa_t *ike_sa)
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{
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private_initiator_init_t *this = malloc_thing(private_initiator_init_t);
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/* interface functions */
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this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
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this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
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this->public.state_interface.destroy = (void (*) (state_t *)) destroy;
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/* public functions */
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this->public.initiate_connection = (status_t (*)(initiator_init_t *, connection_t*)) initiate_connection;
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this->public.retry_initiate_connection = (status_t (*)(initiator_init_t *, int )) retry_initiate_connection;
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/* private functions */
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this->destroy_after_state_change = destroy_after_state_change;
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this->build_nonce_payload = build_nonce_payload;
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this->build_sa_payload = build_sa_payload;
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this->build_ke_payload = build_ke_payload;
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/* private data */
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this->ike_sa = ike_sa;
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this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
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this->sent_nonce = CHUNK_INITIALIZER;
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this->diffie_hellman = NULL;
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return &(this->public);
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}
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