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-rw-r--r--Source/charon/sa/states/responder_init.c568
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diff --git a/Source/charon/sa/states/responder_init.c b/Source/charon/sa/states/responder_init.c
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--- a/Source/charon/sa/states/responder_init.c
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-/**
- * @file responder_init.c
- *
- * @brief Implementation of responder_init_t.
- *
- */
-
-/*
- * 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 <daemon.h>
-#include <sa/states/state.h>
-#include <sa/states/ike_sa_init_responded.h>
-#include <encoding/payloads/sa_payload.h>
-#include <encoding/payloads/ke_payload.h>
-#include <encoding/payloads/nonce_payload.h>
-#include <encoding/payloads/notify_payload.h>
-#include <crypto/diffie_hellman.h>
-
-
-typedef struct private_responder_init_t private_responder_init_t;
-
-/**
- * Private data of a responder_init_t object.
- *
- */
-struct private_responder_init_t {
- /**
- * 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.
- */
- diffie_hellman_t *diffie_hellman;
-
- /**
- * Diffie Hellman group number from selected IKE proposal.
- */
- 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.
- */
- chunk_t sent_nonce;
-
- /**
- * Received nonce value
- *
- * This value is passed to the next state of type IKE_SA_INIT_RESPONDED.
- */
- chunk_t received_nonce;
-
- /**
- * Selected proposal
- */
- proposal_t *proposal;
-
- /**
- * Logger used to log data .
- *
- * Is logger of ike_sa!
- */
- logger_t *logger;
-
- /**
- * Handles received SA payload and builds the SA payload for the response.
- *
- * @param this calling object
- * @param sa_request The received SA payload
- * @param response the SA payload is added to this response message_t object.
- * @return
- * - DELETE_ME
- * - SUCCESS
- */
- status_t (*build_sa_payload) (private_responder_init_t *this,sa_payload_t *sa_request, message_t *response);
-
- /**
- * Handles received KE payload and builds the KE payload for the response.
- *
- * @param this calling object
- * @param ke_request The received KE payload
- * @param response the KE payload is added to this response message_t object.
- * - DELETE_ME
- * - SUCCESS
- */
- status_t (*build_ke_payload) (private_responder_init_t *this,ke_payload_t *ke_request, message_t *response);
-
- /**
- * Handles received NONCE payload and builds the NONCE payload for the response.
- *
- * @param this calling object
- * @param nonce_request The received NONCE payload
- * @param response the NONCE payload is added to this response message_t object.
- * - DELETE_ME
- * - SUCCESS
- */
- status_t (*build_nonce_payload) (private_responder_init_t *this,nonce_payload_t *nonce_request, message_t *response);
-
- /**
- * Sends a IKE_SA_INIT reply containing a notify payload.
- *
- * @param this calling object
- * @param notify_payload notify_payload to process
- */
- status_t (*process_notify_payload) (private_responder_init_t *this, notify_payload_t *notify_payload);
-
- /**
- * Destroy function called internally of this class after change
- * to state IKE_SA_INIT_RESPONDED succeeded.
- *
- * This destroy function does not destroy objects which were passed to the new state.
- *
- * @param this calling object
- */
- void (*destroy_after_state_change) (private_responder_init_t *this);
-
-};
-
-/**
- * Implementation of state_t.process_message.
- */
-static status_t process_message(private_responder_init_t *this, message_t *message)
-{
- ike_sa_init_responded_t *next_state;
- chunk_t ike_sa_init_response_data;
- chunk_t ike_sa_init_request_data;
- sa_payload_t *sa_request = NULL;
- ke_payload_t *ke_request = NULL;
- nonce_payload_t *nonce_request = NULL;
- host_t *source, *destination;
- connection_t *connection;
- iterator_t *payloads;
- message_t *response;
- status_t status;
-
- if (message->get_exchange_type(message) != IKE_SA_INIT)
- {
- this->logger->log(this->logger, ERROR | LEVEL1, "Message of type %s not supported in state responder_init",mapping_find(exchange_type_m,message->get_exchange_type(message)));
- return DELETE_ME;
- }
- if (!message->get_request(message))
- {
- this->logger->log(this->logger, ERROR | LEVEL1, "IKE_SA_INIT responses not allowed state ike_sa_init_responded");
- return DELETE_ME;
- }
-
- /* this is the first message to process, so get host infos */
- source = message->get_source(message);
- destination = message->get_destination(message);
-
- connection = charon->connections->get_connection_by_hosts(charon->connections, destination, source);
- if (connection == NULL)
- {
- /* no configuration matches given hosts */
- this->logger->log(this->logger, AUDIT, "IKE_SA_INIT request does not match any available connection. Deleting IKE_SA");
- /* TODO: inform requestor */
- return DELETE_ME;
- }
- this->ike_sa->set_connection(this->ike_sa,connection);
-
- /* parse incoming message */
- status = message->parse_body(message, NULL, NULL);
- if (status != SUCCESS)
- {
- if (status == NOT_SUPPORTED)
- {
- this->logger->log(this->logger, AUDIT, "IKE_SA_INIT request contains unsupported payload with critical flag set. "
- "Deleting IKE_SA");
- this->ike_sa->send_notify(this->ike_sa, IKE_SA_INIT, UNSUPPORTED_CRITICAL_PAYLOAD, CHUNK_INITIALIZER);
- }
- else
- {
- this->logger->log(this->logger, AUDIT, "Unable to parse IKE_SA_INIT request. Deleting IKE_SA");
- }
- return DELETE_ME;
- }
-
- payloads = message->get_payload_iterator(message);
- while (payloads->has_next(payloads))
- {
- payload_t *payload;
-
- payloads->current(payloads, (void**)&payload);
-
- switch (payload->get_type(payload))
- {
- case SECURITY_ASSOCIATION:
- {
- sa_request = (sa_payload_t*)payload;
- break;
- }
- case KEY_EXCHANGE:
- {
- ke_request = (ke_payload_t*)payload;
- break;
- }
- case NONCE:
- {
- nonce_request = (nonce_payload_t*)payload;
- break;
- }
- case NOTIFY:
- {
- notify_payload_t *notify_payload = (notify_payload_t *) payload;
- status = this->process_notify_payload(this, notify_payload);
- if (status != SUCCESS)
- {
- payloads->destroy(payloads);
- return status;
- }
- }
- default:
- {
- this->logger->log(this->logger, ERROR|LEVEL1, "Ignoring payload %s (%d)",
- mapping_find(payload_type_m, payload->get_type(payload)), payload->get_type(payload));
- break;
- }
- }
- }
- payloads->destroy(payloads);
-
- /* check if we have all payloads */
- if (!(sa_request && ke_request && nonce_request))
- {
- this->logger->log(this->logger, AUDIT, "IKE_SA_INIT request did not contain all required payloads. Deleting IKE_SA");
- return DELETE_ME;
- }
-
- this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, FALSE, &response);
-
- status = this->build_sa_payload(this, sa_request, response);
- if (status != SUCCESS)
- {
- response->destroy(response);
- return status;
- }
-
- status = this->build_ke_payload(this, ke_request, response);
- if (status != SUCCESS)
- {
- response->destroy(response);
- return status;
- }
-
- status = this->build_nonce_payload(this, nonce_request, response);
- if (status != SUCCESS)
- {
- response->destroy(response);
- return status;
- }
-
- /* derive all the keys used in the IKE_SA */
- status = this->ike_sa->build_transforms(this->ike_sa, this->proposal, this->diffie_hellman, this->received_nonce, this->sent_nonce);
- if (status != SUCCESS)
- {
- this->logger->log(this->logger, AUDIT, "Transform objects could not be created from selected proposal. Deleting IKE_SA");
- return DELETE_ME;
- }
-
- /* message can now be sent (must not be destroyed) */
- status = this->ike_sa->send_response(this->ike_sa, response);
- if (status != SUCCESS)
- {
- this->logger->log(this->logger, AUDIT, "Unable to send IKE_SA_INIT response. Deleting IKE_SA");
- response->destroy(response);
- return DELETE_ME;
- }
-
- /* state can now be changed */
- this->logger->log(this->logger, CONTROL|LEVEL2, "Create next state object of type IKE_SA_INIT_RESPONDED");
-
- response = this->ike_sa->get_last_responded_message(this->ike_sa);
- ike_sa_init_response_data = response->get_packet_data(response);
- ike_sa_init_request_data = message->get_packet_data(message);
-
- next_state = ike_sa_init_responded_create(this->ike_sa, this->received_nonce, this->sent_nonce,ike_sa_init_request_data,
- ike_sa_init_response_data);
-
- /* state can now be changed */
- this->ike_sa->set_new_state(this->ike_sa, (state_t *) next_state);
- this->destroy_after_state_change(this);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of private_initiator_init_t.build_sa_payload.
- */
-static status_t build_sa_payload(private_responder_init_t *this,sa_payload_t *sa_request, message_t *response)
-{
- proposal_t *proposal;
- linked_list_t *proposal_list;
- connection_t *connection;
- sa_payload_t* sa_payload;
- algorithm_t *algo;
-
- connection = this->ike_sa->get_connection(this->ike_sa);
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Process received SA payload");
-
- /* get the list of suggested proposals */
- proposal_list = sa_request->get_proposals (sa_request);
-
- /* select proposal */
- this->proposal = connection->select_proposal(connection, proposal_list);
- while(proposal_list->remove_last(proposal_list, (void**)&proposal) == SUCCESS)
- {
- proposal->destroy(proposal);
- }
- proposal_list->destroy(proposal_list);
- if (this->proposal == NULL)
- {
- this->logger->log(this->logger, AUDIT, "IKE_SA_INIT request did not contain any acceptable proposals. Deleting IKE_SA");
- this->ike_sa->send_notify(this->ike_sa, IKE_SA_INIT, NO_PROPOSAL_CHOSEN, CHUNK_INITIALIZER);
- return DELETE_ME;
- }
- /* get selected DH group to force policy, this is very restrictive!? */
- this->proposal->get_algorithm(this->proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, &algo);
- this->dh_group_number = algo->algorithm;
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "SA Payload processed");
-
- this->logger->log(this->logger, CONTROL|LEVEL2, "Building SA payload");
- sa_payload = sa_payload_create_from_proposal(this->proposal);
- this->logger->log(this->logger, CONTROL|LEVEL2, "add SA payload to message");
- response->add_payload(response,(payload_t *) sa_payload);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of private_initiator_init_t.build_ke_payload.
- */
-static status_t build_ke_payload(private_responder_init_t *this,ke_payload_t *ke_request, message_t *response)
-{
- diffie_hellman_group_t group;
- ke_payload_t *ke_payload;
- diffie_hellman_t *dh;
- chunk_t key_data;
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Process received KE payload");
- group = ke_request->get_dh_group_number(ke_request);
-
- if (group == MODP_UNDEFINED)
- {
- this->logger->log(this->logger, AUDIT, "No diffie hellman group to select. Deleting IKE_SA");
- return DELETE_ME;
- }
-
- if (this->dh_group_number != group)
- {
- u_int16_t accepted_group;
- chunk_t accepted_group_chunk;
- /* group not same as selected one
- * Maybe key exchange payload is before SA payload */
- this->logger->log(this->logger, AUDIT, "IKE_SA_INIT request did not contain a acceptable diffie hellman group. Deleting IKE_SA");
-
- accepted_group = htons(this->dh_group_number);
- accepted_group_chunk.ptr = (u_int8_t*) &(accepted_group);
- accepted_group_chunk.len = 2;
- this->ike_sa->send_notify(this->ike_sa,IKE_SA_INIT,INVALID_KE_PAYLOAD,accepted_group_chunk);
- return DELETE_ME;
- }
-
- /* create diffie hellman object to handle DH exchange */
- dh = diffie_hellman_create(group);
- if (dh == NULL)
- {
- this->logger->log(this->logger, AUDIT, "Could not generate DH object with group %d. Deleting IKE_SA",
- mapping_find(diffie_hellman_group_m,group) );
- return DELETE_ME;
- }
- this->logger->log(this->logger, CONTROL | LEVEL2, "Set other DH public value");
-
- dh->set_other_public_value(dh, ke_request->get_key_exchange_data(ke_request));
-
- this->diffie_hellman = dh;
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "KE Payload processed.");
-
- this->logger->log(this->logger, CONTROL|LEVEL2, "Building KE payload");
- this->diffie_hellman->get_my_public_value(this->diffie_hellman,&key_data);
-
- ke_payload = ke_payload_create();
- ke_payload->set_key_exchange_data(ke_payload,key_data);
- ke_payload->set_dh_group_number(ke_payload, this->dh_group_number);
- chunk_free(&key_data);
-
- this->logger->log(this->logger, CONTROL|LEVEL2, "Add KE payload to message");
- response->add_payload(response,(payload_t *) ke_payload);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of private_responder_init_t.build_nonce_payload.
- */
-static status_t build_nonce_payload(private_responder_init_t *this,nonce_payload_t *nonce_request, message_t *response)
-{
- nonce_payload_t *nonce_payload;
- randomizer_t *randomizer;
- status_t status;
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Process received NONCE payload");
- free(this->received_nonce.ptr);
- this->received_nonce = CHUNK_INITIALIZER;
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Get NONCE value and store it");
- this->received_nonce = nonce_request->get_nonce(nonce_request);
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Create new NONCE value.");
-
- randomizer = this->ike_sa->get_randomizer(this->ike_sa);
- status = randomizer->allocate_pseudo_random_bytes(randomizer, NONCE_SIZE, &(this->sent_nonce));
- if (status != SUCCESS)
- {
- return status;
- }
-
- this->logger->log(this->logger, CONTROL|LEVEL2, "Building NONCE payload");
- nonce_payload = nonce_payload_create();
- nonce_payload->set_nonce(nonce_payload, this->sent_nonce);
-
- this->logger->log(this->logger, CONTROL|LEVEL2, "Add NONCE payload to message");
- response->add_payload(response,(payload_t *) nonce_payload);
-
- return SUCCESS;
-}
-
-/**
- * Implementation of private_responder_init_t.process_notify_payload.
- */
-static status_t process_notify_payload(private_responder_init_t *this, notify_payload_t *notify_payload)
-{
- notify_message_type_t notify_message_type = notify_payload->get_notify_message_type(notify_payload);
-
- this->logger->log(this->logger, CONTROL|LEVEL1, "Process notify type %s",
- mapping_find(notify_message_type_m, notify_message_type));
-
- if (notify_payload->get_protocol_id(notify_payload) != PROTO_IKE)
- {
- this->logger->log(this->logger, ERROR | LEVEL1, "Notify reply not for IKE protocol.");
- return FAILED;
- }
- switch (notify_message_type)
- {
- default:
- {
- this->logger->log(this->logger, CONTROL, "IKE_SA_INIT request contained a notify (%d), ignored.",
- notify_message_type);
- return SUCCESS;
- }
- }
-}
-
-/**
- * Implementation of state_t.get_state.
- */
-static ike_sa_state_t get_state(private_responder_init_t *this)
-{
- return RESPONDER_INIT;
-}
-
-/**
- * Implementation of state_t.destroy.
- */
-static void destroy(private_responder_init_t *this)
-{
- this->logger->log(this->logger, CONTROL | LEVEL1, "Going to destroy responder init state object");
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy sent nonce");
- chunk_free(&(this->sent_nonce));
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy received nonce");
- chunk_free(&(this->received_nonce));
-
- if (this->diffie_hellman != NULL)
- {
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy diffie_hellman_t hellman object");
- this->diffie_hellman->destroy(this->diffie_hellman);
- }
- if (this->proposal)
- {
- this->proposal->destroy(this->proposal);
- }
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy object");
- free(this);
-}
-
-/**
- * Implementation of private_responder_init_t.destroy_after_state_change
- */
-static void destroy_after_state_change (private_responder_init_t *this)
-{
- this->logger->log(this->logger, CONTROL | LEVEL1, "Going to destroy responder_init_t state object");
-
- /* destroy diffie hellman object */
- if (this->diffie_hellman != NULL)
- {
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy diffie_hellman_t object");
- this->diffie_hellman->destroy(this->diffie_hellman);
- }
- if (this->proposal)
- {
- this->proposal->destroy(this->proposal);
- }
-
- this->logger->log(this->logger, CONTROL | LEVEL2, "Destroy object");
- free(this);
-}
-
-/*
- * Described in header.
- */
-responder_init_t *responder_init_create(protected_ike_sa_t *ike_sa)
-{
- private_responder_init_t *this = malloc_thing(private_responder_init_t);
-
- /* interface functions */
- this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
- this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
- this->public.state_interface.destroy = (void (*) (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;
- this->process_notify_payload = process_notify_payload;
-
- /* private data */
- this->ike_sa = ike_sa;
- this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
- this->sent_nonce = CHUNK_INITIALIZER;
- this->received_nonce = CHUNK_INITIALIZER;
- this->dh_group_number = MODP_UNDEFINED;
- this->diffie_hellman = NULL;
- this->proposal = NULL;
-
- return &(this->public);
-}
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