diff options
Diffstat (limited to 'Source/charon/states/responder_init.c')
| -rw-r--r-- | Source/charon/states/responder_init.c | 743 |
1 files changed, 0 insertions, 743 deletions
diff --git a/Source/charon/states/responder_init.c b/Source/charon/states/responder_init.c deleted file mode 100644 index 7b2f4998f..000000000 --- a/Source/charon/states/responder_init.c +++ /dev/null @@ -1,743 +0,0 @@ -/** - * @file responder_init.c - * - * @brief Start state of a IKE_SA as responder - * - */ - -/* - * Copyright (C) 2005 Jan Hutter, Martin Willi - * 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. - */ - -#include "responder_init.h" - -#include <globals.h> -#include <states/state.h> -#include <states/ike_sa_init_responded.h> -#include <utils/allocator.h> -#include <encoding/payloads/sa_payload.h> -#include <encoding/payloads/ke_payload.h> -#include <encoding/payloads/nonce_payload.h> -#include <transforms/diffie_hellman.h> - -/** - * Private data of a responder_init_t object. - * - */ -typedef struct private_responder_init_s private_responder_init_t; -struct private_responder_init_s { - /** - * Methods of the state_t interface. - */ - responder_init_t public; - - /** - * Assigned IKE_SA. - */ - protected_ike_sa_t *ike_sa; - - /** - * Diffie Hellman object used to compute shared secret. - * - * After processing of incoming IKE_SA_INIT-Request the shared key is - * passed to the next state of type ike_sa_init_responded_t. - */ - diffie_hellman_t *diffie_hellman; - - /** - * Diffie Hellman group number. - */ - u_int16_t dh_group_number; - - /** - * Priority used to get matching dh_group number. - */ - u_int16_t dh_group_priority; - - /** - * Sent nonce value. - * - * This value is passed to the next state of type ike_sa_init_responded_t. - */ - chunk_t sent_nonce; - - /** - * Received nonce value - * - * This value is passed to the next state of type ike_sa_init_responded_t. - */ - chunk_t received_nonce; - - /** - * Logger used to log data - * - * Is logger of ike_sa! - */ - logger_t *logger; - - /** - * Proposals used to initiate connection - */ - linked_list_t *proposals; - - /** - * Builds the SA payload for this state. - * - * @param this calling object - * @param payload The generated SA payload object of type ke_payload_t is - * stored at this location. - * @return - * - SUCCESS - * - OUT_OF_RES - */ - status_t (*build_sa_payload) (private_responder_init_t *this, payload_t **payload); - - /** - * Builds the KE payload for this state. - * - * @param this calling object - * @param payload The generated KE payload object of type ke_payload_t is - * stored at this location. - * @return - * - SUCCESS - * - OUT_OF_RES - */ - status_t (*build_ke_payload) (private_responder_init_t *this, payload_t **payload); - /** - * Builds the NONCE payload for this state. - * - * @param this calling object - * @param payload The generated NONCE payload object of type ke_payload_t is - * stored at this location. - * @return - * - SUCCESS - * - OUT_OF_RES - */ - status_t (*build_nonce_payload) (private_responder_init_t *this, payload_t **payload); - - /** - * Destroy function called internally of this class after state change succeeded. - * - * This destroy function does not destroy objects which were passed to the new state. - * - * @param this calling object - * @return SUCCESS in any case - */ - status_t (*destroy_after_state_change) (private_responder_init_t *this); -}; - -/** - * Implements state_t.get_state - */ -static status_t process_message(private_responder_init_t *this, message_t *message, state_t **new_state) -{ - linked_list_iterator_t *payloads; - host_t *source, *destination; - status_t status; - message_t *response; - payload_t *payload; - packet_t *packet; - chunk_t shared_secret; - exchange_type_t exchange_type; - ike_sa_init_responded_t *next_state; - - exchange_type = message->get_exchange_type(message); - if (exchange_type != IKE_SA_INIT) - { - this->logger->log(this->logger, ERROR | MORE, "Message of type %s not supported in state responder_init",mapping_find(exchange_type_m,exchange_type)); - return FAILED; - } - - if (!message->get_request(message)) - { - this->logger->log(this->logger, ERROR | MORE, "Only requests of type IKE_SA_INIT supported in state responder_init"); - return FAILED; - } - - /* this is the first message we process, so copy host infos */ - message->get_source(message, &source); - message->get_destination(message, &destination); - - /* we need to clone them, since we destroy the message later */ - destination->clone(destination, &(this->ike_sa->me.host)); - source->clone(source, &(this->ike_sa->other.host)); - - /* parse incoming message */ - status = message->parse_body(message); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR | MORE, "Could not parse body of request message"); - return status; - } - - /* iterate over incoming payloads. We can be sure, the message contains only accepted payloads! */ - status = message->get_payload_iterator(message, &payloads); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not get payload interator"); - return status; - } - - while (payloads->has_next(payloads)) - { - payload_t *payload; - - /* get current payload */ - payloads->current(payloads, (void**)&payload); - - this->logger->log(this->logger, CONTROL|MORE, "Processing payload of type %s", mapping_find(payload_type_m, payload->get_type(payload))); - switch (payload->get_type(payload)) - { - case SECURITY_ASSOCIATION: - { - sa_payload_t *sa_payload = (sa_payload_t*)payload; - linked_list_iterator_t *suggested_proposals, *accepted_proposals; - encryption_algorithm_t encryption_algorithm = ENCR_UNDEFINED; - pseudo_random_function_t pseudo_random_function = PRF_UNDEFINED; - integrity_algorithm_t integrity_algorithm = AUTH_UNDEFINED; - - status = this->proposals->create_iterator(this->proposals, &accepted_proposals, FALSE); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not create iterator on list for proposals"); - payloads->destroy(payloads); - return status; - } - - /* get the list of suggested proposals */ - status = sa_payload->create_proposal_substructure_iterator(sa_payload, &suggested_proposals, TRUE); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not create iterator on suggested proposals"); - accepted_proposals->destroy(accepted_proposals); - payloads->destroy(payloads); - return status; - } - - /* now let the configuration-manager select a subset of the proposals */ - status = global_configuration_manager->select_proposals_for_host(global_configuration_manager, - this->ike_sa->other.host, suggested_proposals, accepted_proposals); - if (status != SUCCESS) - { - this->logger->log(this->logger, CONTROL | MORE, "No proposal of suggested proposals selected"); - suggested_proposals->destroy(suggested_proposals); - accepted_proposals->destroy(accepted_proposals); - payloads->destroy(payloads); - return status; - } - - /* iterators are not needed anymore */ - suggested_proposals->destroy(suggested_proposals); - - - /* now let the configuration-manager return the transforms for the given proposal*/ - this->logger->log(this->logger, CONTROL | MOST, "Get transforms for accepted proposal"); - status = global_configuration_manager->get_transforms_for_host_and_proposals(global_configuration_manager, - this->ike_sa->other.host, accepted_proposals, &encryption_algorithm,&pseudo_random_function,&integrity_algorithm); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR | MORE, "Accepted proposals not supported?!"); - accepted_proposals->destroy(accepted_proposals); - payloads->destroy(payloads); - return status; - } - accepted_proposals->destroy(accepted_proposals); - - this->ike_sa->prf = prf_create(pseudo_random_function); - if (this->ike_sa->prf == NULL) - { - this->logger->log(this->logger, ERROR | MORE, "PRF type not supported"); - payloads->destroy(payloads); - return FAILED; - } - - this->logger->log(this->logger, CONTROL | MORE, "SA Payload processed"); - /* ok, we have what we need for sa_payload (proposals are stored in this->proposals)*/ - break; - } - case KEY_EXCHANGE: - { - ke_payload_t *ke_payload = (ke_payload_t*)payload; - diffie_hellman_group_t group; - diffie_hellman_t *dh; - bool allowed_group; - - group = ke_payload->get_dh_group_number(ke_payload); - - status = global_configuration_manager->is_dh_group_allowed_for_host(global_configuration_manager, - this->ike_sa->other.host, group, &allowed_group); - - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR | MORE, "Could not get informations about DH group"); - payloads->destroy(payloads); - return status; - } - if (!allowed_group) - { - /** @todo Send info reply */ - } - - /* create diffie hellman object to handle DH exchange */ - dh = diffie_hellman_create(group); - if (dh == NULL) - { - this->logger->log(this->logger, ERROR, "Could not generate DH object"); - payloads->destroy(payloads); - return OUT_OF_RES; - } - - this->logger->log(this->logger, CONTROL | MORE, "Set other DH public value"); - - status = dh->set_other_public_value(dh, ke_payload->get_key_exchange_data(ke_payload)); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not set other DH public value"); - dh->destroy(dh); - payloads->destroy(payloads); - return OUT_OF_RES; - } - - this->diffie_hellman = dh; - - this->logger->log(this->logger, CONTROL | MORE, "KE Payload processed"); - break; - } - case NONCE: - { - nonce_payload_t *nonce_payload = (nonce_payload_t*)payload; - - if (this->received_nonce.ptr != NULL) - { - this->logger->log(this->logger, CONTROL | MOST, "Destroy stored received nonce"); - allocator_free(this->received_nonce.ptr); - this->received_nonce.ptr = NULL; - this->received_nonce.len = 0; - } - - this->logger->log(this->logger, CONTROL | MORE, "Get nonce value and store it"); - status = nonce_payload->get_nonce(nonce_payload, &(this->received_nonce)); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not get nonce"); - payloads->destroy(payloads); - return OUT_OF_RES; - } - - this->logger->log(this->logger, CONTROL | MORE, "Nonce Payload processed"); - break; - } - default: - { - this->logger->log(this->logger, ERROR | MORE, "Payload type not supported!"); - payloads->destroy(payloads); - return OUT_OF_RES; - } - - } - - } - /* iterator can be destroyed */ - payloads->destroy(payloads); - - this->logger->log(this->logger, CONTROL | MORE, "Request successfully handled. Going to create reply."); - - this->logger->log(this->logger, CONTROL | MOST, "Going to create nonce."); - if (this->ike_sa->randomizer->allocate_pseudo_random_bytes(this->ike_sa->randomizer, NONCE_SIZE, &(this->sent_nonce)) != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not create nonce!"); - return OUT_OF_RES; - } - - /* store shared secret */ - this->logger->log(this->logger, CONTROL | MOST, "Retrieve shared secret and store it"); - status = this->diffie_hellman->get_shared_secret(this->diffie_hellman, &shared_secret); - this->logger->log_chunk(this->logger, PRIVATE, "Shared secret", &shared_secret); - - status = this->ike_sa->compute_secrets(this->ike_sa,shared_secret,this->received_nonce, this->sent_nonce); - if (status != SUCCESS) - { - /* secrets could not be computed */ - this->logger->log(this->logger, ERROR | MORE, "Secrets could not be computed!"); - return status; - } - - - - /* set up the reply */ - status = this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, FALSE, &response); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not create empty message"); - return status; - } - - /* build SA payload */ - status = this->build_sa_payload(this, &payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not build SA payload"); - return status; - } - - this ->logger->log(this->logger, CONTROL|MOST, "add SA payload to message"); - status = response->add_payload(response, payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not add SA payload to message"); - return status; - } - - /* build KE payload */ - status = this->build_ke_payload(this,&payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not build KE payload"); - return status; - } - - this ->logger->log(this->logger, CONTROL|MOST, "add KE payload to message"); - status = response->add_payload(response, payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not add KE payload to message"); - return status; - } - - /* build Nonce payload */ - status = this->build_nonce_payload(this, &payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not build NONCE payload"); - return status; - } - - this ->logger->log(this->logger, CONTROL|MOST, "add nonce payload to message"); - status = response->add_payload(response, payload); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not add nonce payload to message"); - return status; - } - - /* generate packet */ - this ->logger->log(this->logger, CONTROL|MOST, "generate packet from message"); - status = response->generate(response, &packet); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: could not generate packet from message"); - return status; - } - - this ->logger->log(this->logger, CONTROL|MOST, "Add packet to global send queue"); - status = global_send_queue->add(global_send_queue, packet); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not add packet to send queue"); - return status; - } - - /* state can now be changed */ - this ->logger->log(this->logger, CONTROL|MOST, "Create next state object"); - - next_state = ike_sa_init_responded_create(this->ike_sa, shared_secret, this->received_nonce, this->sent_nonce); - - if (next_state == NULL) - { - this ->logger->log(this->logger, ERROR, "Fatal error: could not create next state object of type ike_sa_init_responded_t"); - allocator_free_chunk(shared_secret); - return FAILED; - } - - if ( this->ike_sa->last_responded_message != NULL) - { - /* destroy message */ - this ->logger->log(this->logger, CONTROL|MOST, "Destroy stored last responded message"); - this->ike_sa->last_responded_message->destroy(this->ike_sa->last_responded_message); - } - this->ike_sa->last_responded_message = response; - - /* message counter can now be increased */ - this ->logger->log(this->logger, CONTROL|MOST, "Increate message counter for incoming messages"); - this->ike_sa->message_id_in++; - - *new_state = (state_t *) next_state; - /* state has NOW changed :-) */ - this ->logger->log(this->logger, CONTROL|MORE, "Changed state of IKE_SA from %s to %s",mapping_find(ike_sa_state_m,RESPONDER_INIT),mapping_find(ike_sa_state_m,IKE_SA_INIT_RESPONDED) ); - - this ->logger->log(this->logger, CONTROL|MOST, "Destroy old sate object"); - this->destroy_after_state_change(this); - - return SUCCESS; -} - -/** - * implements private_initiator_init_t.build_sa_payload - */ -static status_t build_sa_payload(private_responder_init_t *this, payload_t **payload) -{ - sa_payload_t* sa_payload; - linked_list_iterator_t *proposal_iterator; - status_t status; - - - /* SA payload takes proposals from this->ike_sa_init_data.proposals and writes them to the created sa_payload */ - - this->logger->log(this->logger, CONTROL|MORE, "building sa payload"); - - status = this->proposals->create_iterator(this->proposals, &proposal_iterator, FALSE); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not create iterator on list for proposals"); - return status; - } - - sa_payload = sa_payload_create(); - if (sa_payload == NULL) - { - this->logger->log(this->logger, ERROR, "Fatal error: Could not create SA payload object"); - return OUT_OF_RES; - } - - while (proposal_iterator->has_next(proposal_iterator)) - { - proposal_substructure_t *current_proposal; - proposal_substructure_t *current_proposal_clone; - status = proposal_iterator->current(proposal_iterator,(void **) ¤t_proposal); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not get current proposal needed to copy"); - proposal_iterator->destroy(proposal_iterator); - sa_payload->destroy(sa_payload); - return status; - } - status = current_proposal->clone(current_proposal,¤t_proposal_clone); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not clone current proposal"); - proposal_iterator->destroy(proposal_iterator); - sa_payload->destroy(sa_payload); - return status; - } - - status = sa_payload->add_proposal_substructure(sa_payload,current_proposal_clone); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not add cloned proposal to SA payload"); - proposal_iterator->destroy(proposal_iterator); - sa_payload->destroy(sa_payload); - return status; - } - - } - - proposal_iterator->destroy(proposal_iterator); - - this->logger->log(this->logger, CONTROL|MORE, "sa payload builded"); - - *payload = (payload_t *) sa_payload; - - return SUCCESS; -} - -/** - * implements private_initiator_init_t.build_ke_payload - */ -static status_t build_ke_payload(private_responder_init_t *this, payload_t **payload) -{ - ke_payload_t *ke_payload; - chunk_t key_data; - status_t status; - - this->logger->log(this->logger, CONTROL|MORE, "building ke payload"); - - - this ->logger->log(this->logger, CONTROL|MORE, "get public dh value to send in ke payload"); - status = this->diffie_hellman->get_my_public_value(this->diffie_hellman,&key_data); - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not get my DH public value"); - return status; - } - - ke_payload = ke_payload_create(); - if (ke_payload == NULL) - { - this->logger->log(this->logger, ERROR, "Could not create KE payload"); - allocator_free_chunk(key_data); - return OUT_OF_RES; - } - ke_payload->set_dh_group_number(ke_payload, MODP_1024_BIT); - if (ke_payload->set_key_exchange_data(ke_payload, key_data) != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Could not set key exchange data of KE payload"); - ke_payload->destroy(ke_payload); - allocator_free_chunk(key_data); - return OUT_OF_RES; - } - allocator_free_chunk(key_data); - - *payload = (payload_t *) ke_payload; - return SUCCESS; -} - -/** - * implements private_initiator_init_t.build_nonce_payload - */ -static status_t build_nonce_payload(private_responder_init_t *this, payload_t **payload) -{ - nonce_payload_t *nonce_payload; - status_t status; - - this->logger->log(this->logger, CONTROL|MORE, "building nonce payload"); - - nonce_payload = nonce_payload_create(); - if (nonce_payload == NULL) - { - this->logger->log(this->logger, ERROR, "Fatal error: could not create nonce payload object"); - return OUT_OF_RES; - } - - status = nonce_payload->set_nonce(nonce_payload, this->sent_nonce); - - if (status != SUCCESS) - { - this->logger->log(this->logger, ERROR, "Fatal error: could not set nonce data of payload"); - nonce_payload->destroy(nonce_payload); - return status; - } - - *payload = (payload_t *) nonce_payload; - - return SUCCESS; -} - - -/** - * Implements state_t.get_state - */ -static ike_sa_state_t get_state(private_responder_init_t *this) -{ - return RESPONDER_INIT; -} - -/** - * Implements state_t.get_state - */ -static status_t destroy(private_responder_init_t *this) -{ - this->logger->log(this->logger, CONTROL | MORE, "Going to destroy responder init state object"); - - /* destroy stored proposal */ - this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals"); - while (this->proposals->get_count(this->proposals) > 0) - { - proposal_substructure_t *current_proposal; - this->proposals->remove_first(this->proposals,(void **)¤t_proposal); - current_proposal->destroy(current_proposal); - } - this->proposals->destroy(this->proposals); - - if (this->sent_nonce.ptr != NULL) - { - this->logger->log(this->logger, CONTROL | MOST, "Destroy sent nonce"); - allocator_free(this->sent_nonce.ptr); - } - - if (this->received_nonce.ptr != NULL) - { - this->logger->log(this->logger, CONTROL | MOST, "Destroy received nonce"); - allocator_free(this->received_nonce.ptr); - } - - /* destroy diffie hellman object */ - if (this->diffie_hellman != NULL) - { - this->logger->log(this->logger, CONTROL | MOST, "Destroy diffie_hellman_t object"); - this->diffie_hellman->destroy(this->diffie_hellman); - } - - allocator_free(this); - - return SUCCESS; - -} - -/** - * Implements private_responder_init_t.destroy_after_state_change - */ -static status_t destroy_after_state_change (private_responder_init_t *this) -{ - this->logger->log(this->logger, CONTROL | MORE, "Going to destroy responder_init_t state object"); - - /* destroy stored proposal */ - this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals"); - while (this->proposals->get_count(this->proposals) > 0) - { - proposal_substructure_t *current_proposal; - this->proposals->remove_first(this->proposals,(void **)¤t_proposal); - current_proposal->destroy(current_proposal); - } - this->proposals->destroy(this->proposals); - - /* destroy diffie hellman object */ - if (this->diffie_hellman != NULL) - { - this->logger->log(this->logger, CONTROL | MOST, "Destroy diffie_hellman_t object"); - this->diffie_hellman->destroy(this->diffie_hellman); - } - - allocator_free(this); - return SUCCESS; -} - -/* - * Described in header. - */ -responder_init_t *responder_init_create(protected_ike_sa_t *ike_sa) -{ - private_responder_init_t *this = allocator_alloc_thing(private_responder_init_t); - - if (this == NULL) - { - return NULL; - } - - /* interface functions */ - this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *,state_t **)) process_message; - this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state; - this->public.state_interface.destroy = (status_t (*) (state_t *)) destroy; - - /* private functions */ - this->build_sa_payload = build_sa_payload; - this->build_ke_payload = build_ke_payload; - this->build_nonce_payload = build_nonce_payload; - this->destroy_after_state_change = destroy_after_state_change; - - /* private data */ - this->ike_sa = ike_sa; - this->logger = this->ike_sa->logger; - this->sent_nonce.ptr = NULL; - this->sent_nonce.len = 0; - this->received_nonce.ptr = NULL; - this->received_nonce.len = 0; - this->proposals = linked_list_create(); - if (this->proposals == NULL) - { - allocator_free(this); - return NULL; - } - - return &(this->public); -} |