511 lines
15 KiB
C
511 lines
15 KiB
C
/**
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* @file ike_auth_requested.c
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*
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* @brief Implementation of ike_auth_requested_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 "ike_auth_requested.h"
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#include <daemon.h>
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#include <utils/allocator.h>
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#include <encoding/payloads/ts_payload.h>
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#include <encoding/payloads/sa_payload.h>
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#include <encoding/payloads/id_payload.h>
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#include <encoding/payloads/auth_payload.h>
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#include <encoding/payloads/notify_payload.h>
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#include <transforms/signers/signer.h>
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#include <transforms/crypters/crypter.h>
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#include <sa/states/ike_sa_established.h>
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#include <sa/authenticator.h>
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typedef struct private_ike_auth_requested_t private_ike_auth_requested_t;
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/**
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* Private data of a ike_auth_requested_t object.
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*
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*/
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struct private_ike_auth_requested_t {
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/**
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* Public interface of ike_auth_requested_t.
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*/
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ike_auth_requested_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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* SA config, just a copy of the one stored in the ike_sa.
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*/
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sa_config_t *sa_config;
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/**
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* Received nonce from responder.
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*/
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chunk_t received_nonce;
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/**
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* Sent nonce in IKE_SA_INIT request.
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*/
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chunk_t sent_nonce;
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/**
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* IKE_SA_INIT-Request in binary form.
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*/
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chunk_t ike_sa_init_reply_data;
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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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* Process the IDr payload (check if other id is valid)
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*
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* @param this calling object
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* @param idr_payload ID payload of responder
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* @return
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* - SUCCESS
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* - DELETE_ME
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*/
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status_t (*process_idr_payload) (private_ike_auth_requested_t *this, id_payload_t *idr_payload);
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/**
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* Process the SA payload (check if selected proposals are valid, setup child sa)
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*
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* @param this calling object
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* @param sa_payload SA payload of responder
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*
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* - SUCCESS
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* - DELETE_ME
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*/
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status_t (*process_sa_payload) (private_ike_auth_requested_t *this, sa_payload_t *sa_payload);
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/**
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* Process the AUTH payload (check authenticity of message)
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*
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* @param this calling object
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* @param auth_payload AUTH payload of responder
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* @param other_id_payload ID payload of responder
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*
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* - SUCCESS
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* - DELETE_ME
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*/
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status_t (*process_auth_payload) (private_ike_auth_requested_t *this, auth_payload_t *auth_payload, id_payload_t *other_id_payload);
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/**
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* Process the TS payload (check if selected traffic selectors are valid)
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*
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* @param this calling object
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* @param ts_initiator TRUE if TS payload is TSi, FALSE for TSr
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* @param ts_payload TS payload of responder
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*
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* - SUCCESS
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* - DELETE_ME
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*/
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status_t (*process_ts_payload) (private_ike_auth_requested_t *this, bool ts_initiator, ts_payload_t *ts_payload);
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};
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/**
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* Implements state_t.process_message
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*/
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static status_t process_message(private_ike_auth_requested_t *this, message_t *ike_auth_reply)
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{
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ts_payload_t *tsi_payload, *tsr_payload;
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id_payload_t *idr_payload = NULL;
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auth_payload_t *auth_payload;
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sa_payload_t *sa_payload;
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iterator_t *payloads;
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crypter_t *crypter;
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signer_t *signer;
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status_t status;
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if (ike_auth_reply->get_exchange_type(ike_auth_reply) != IKE_AUTH)
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{
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this->logger->log(this->logger, ERROR | LEVEL1, "Message of type %s not supported in state ike_auth_requested",
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mapping_find(exchange_type_m,ike_auth_reply->get_exchange_type(ike_auth_reply)));
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return FAILED;
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}
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if (ike_auth_reply->get_request(ike_auth_reply))
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{
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this->logger->log(this->logger, ERROR | LEVEL1, "Only responses of type IKE_AUTH supported in state ike_auth_requested");
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return FAILED;
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}
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/* get signer for verification and crypter for decryption */
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signer = this->ike_sa->get_signer_responder(this->ike_sa);
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crypter = this->ike_sa->get_crypter_responder(this->ike_sa);
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/* parse incoming message */
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status = ike_auth_reply->parse_body(ike_auth_reply, crypter, signer);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR | LEVEL1, "Could not parse body of request message");
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return status;
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}
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this->sa_config = this->ike_sa->get_sa_config(this->ike_sa);
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/* iterate over incoming payloads. Message is verified, we can be sure there are the required payloads */
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payloads = ike_auth_reply->get_payload_iterator(ike_auth_reply);
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while (payloads->has_next(payloads))
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{
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payload_t *payload;
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payloads->current(payloads, (void**)&payload);
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switch (payload->get_type(payload))
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{
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case AUTHENTICATION:
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{
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auth_payload = (auth_payload_t*)payload;
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break;
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}
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case ID_RESPONDER:
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{
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idr_payload = (id_payload_t*)payload;
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break;
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}
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case SECURITY_ASSOCIATION:
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{
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sa_payload = (sa_payload_t*)payload;
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break;
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}
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case CERTIFICATE:
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{
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/* TODO handle cert payloads */
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break;
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}
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case TRAFFIC_SELECTOR_INITIATOR:
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{
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tsi_payload = (ts_payload_t*)payload;
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break;
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}
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case TRAFFIC_SELECTOR_RESPONDER:
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{
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tsr_payload = (ts_payload_t*)payload;
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break;
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}
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case NOTIFY:
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{
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notify_payload_t *notify_payload = (notify_payload_t *) payload;
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this->logger->log(this->logger, CONTROL|LEVEL1, "Process notify type %s for protocol %s",
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mapping_find(notify_message_type_m, notify_payload->get_notify_message_type(notify_payload)),
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mapping_find(protocol_id_m, notify_payload->get_protocol_id(notify_payload)));
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if (notify_payload->get_protocol_id(notify_payload) != IKE)
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{
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this->logger->log(this->logger, ERROR | LEVEL1, "Notify reply not for IKE protocol");
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payloads->destroy(payloads);
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return DELETE_ME;
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}
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switch (notify_payload->get_notify_message_type(notify_payload))
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{
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case INVALID_SYNTAX:
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{
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this->logger->log(this->logger, ERROR, "Going to destroy IKE_SA");
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payloads->destroy(payloads);
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return DELETE_ME;
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}
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case AUTHENTICATION_FAILED:
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{
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this->logger->log(this->logger, ERROR, "Keys invalid?. Going to destroy IKE_SA");
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payloads->destroy(payloads);
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return DELETE_ME;
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}
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case SINGLE_PAIR_REQUIRED:
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{
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this->logger->log(this->logger, ERROR, "Please reconfigure CHILD_SA. Going to destroy IKE_SA");
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payloads->destroy(payloads);
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return DELETE_ME;
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}
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default:
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{
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/*
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* - In case of unknown error: IKE_SA gets destroyed.
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* - In case of unknown status: logging
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*
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*/
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notify_message_type_t notify_message_type = notify_payload->get_notify_message_type(notify_payload);
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if (notify_message_type < 16383)
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{
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this->logger->log(this->logger, ERROR, "Notify error type %d not recognized in state IKE_AUTH_REQUESTED.",
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notify_message_type);
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payloads->destroy(payloads);
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return DELETE_ME;
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}
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else
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{
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this->logger->log(this->logger, ERROR, "Notify status type %d not handled in state IKE_AUTH_REQUESTED.",
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notify_message_type);
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break;
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}
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}
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}
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}
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default:
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{
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this->logger->log(this->logger, ERROR, "Payload id %d not handled in state IKE_AUTH_REQUESTED", payload->get_type(payload));
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break;
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}
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}
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}
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/* iterator can be destroyed */
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payloads->destroy(payloads);
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/* process all payloads */
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status = this->process_idr_payload(this, idr_payload);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Processing idr payload failed");
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return status;
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}
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status = this->process_sa_payload(this, sa_payload);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Processing sa payload failed");
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return status;
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}
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status = this->process_auth_payload(this, auth_payload,idr_payload);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Processing auth payload failed");
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return status;
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}
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status = this->process_ts_payload(this, TRUE, tsi_payload);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Processing tsi payload failed");
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return status;
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}
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status = this->process_ts_payload(this, FALSE, tsr_payload);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Processing tsr payload failed");
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return status;
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}
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this->ike_sa->set_last_replied_message_id(this->ike_sa,ike_auth_reply->get_message_id(ike_auth_reply));
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this->logger->log(this->logger, CONTROL | LEVEL1, "IKE_AUTH response successfully handled. IKE_SA established.");
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/* create new state */
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this->ike_sa->set_new_state(this->ike_sa, (state_t*)ike_sa_established_create(this->ike_sa));
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this->ike_sa->create_delete_established_ike_sa_job(this->ike_sa,this->sa_config->get_ike_sa_lifetime(this->sa_config));
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this->public.state_interface.destroy(&(this->public.state_interface));
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return SUCCESS;
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}
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/**
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* Implements private_ike_auth_requested_t.process_idr_payload
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*/
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static status_t process_idr_payload(private_ike_auth_requested_t *this, id_payload_t *idr_payload)
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{
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identification_t *other_id, *configured_other_id;
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other_id = idr_payload->get_identification(idr_payload);
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configured_other_id = this->sa_config->get_other_id(this->sa_config);
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if (configured_other_id)
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{
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this->logger->log(this->logger, CONTROL, "configured ID: %s, ID of responder: %s",
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configured_other_id->get_string(configured_other_id),
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other_id->get_string(other_id));
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if (!other_id->equals(other_id, configured_other_id))
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{
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other_id->destroy(other_id);
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this->logger->log(this->logger, ERROR, "IKE_AUTH reply didn't contain requested id");
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return DELETE_ME;
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}
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}
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other_id->destroy(other_id);
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/* TODO do we have to store other_id somewhere ? */
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return SUCCESS;
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}
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/**
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* Implements private_ike_auth_requested_t.process_sa_payload
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*/
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static status_t process_sa_payload(private_ike_auth_requested_t *this, sa_payload_t *sa_payload)
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{
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child_proposal_t *proposals, *proposal_chosen;
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size_t proposal_count;
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status_t status;
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/* dummy spis, until we have a child sa to request them */
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u_int8_t ah_spi[4] = {0x01, 0x02, 0x03, 0x04};
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u_int8_t esp_spi[4] = {0x05, 0x06, 0x07, 0x08};
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/* check selected proposal */
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status = sa_payload->get_child_proposals(sa_payload, &proposals, &proposal_count);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "responders sa payload contained no proposals");
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return DELETE_ME;
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}
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if (proposal_count > 1)
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{
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allocator_free(proposals);
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this->logger->log(this->logger, ERROR, "responders sa payload contained more than one proposal");
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return DELETE_ME;
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}
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proposal_chosen = this->sa_config->select_proposal(this->sa_config, ah_spi, esp_spi, proposals, proposal_count);
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if (proposal_chosen == NULL)
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{
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this->logger->log(this->logger, ERROR, "responder selected an not offered proposal");
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allocator_free(proposals);
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return DELETE_ME;
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}
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else
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{
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allocator_free(proposal_chosen);
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}
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allocator_free(proposals);
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return SUCCESS;
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}
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/**
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* Implements private_ike_auth_requested_t.process_auth_payload
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*/
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static status_t process_auth_payload(private_ike_auth_requested_t *this, auth_payload_t *auth_payload, id_payload_t *other_id_payload)
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{
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authenticator_t *authenticator;
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status_t status;
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/* TODO VERIFY auth here */
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authenticator = authenticator_create(this->ike_sa);
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status = authenticator->verify_auth_data(authenticator,auth_payload,this->ike_sa_init_reply_data,this->sent_nonce,other_id_payload,FALSE);
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authenticator->destroy(authenticator);
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if (status != SUCCESS)
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{
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this->logger->log(this->logger, ERROR, "Could not verify AUTH data. Error status: %s",mapping_find(status_m,status));
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return DELETE_ME;
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}
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this->logger->log(this->logger, CONTROL | LEVEL1, "AUTH data verified");
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return SUCCESS;
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}
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/**
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* Implements private_ike_auth_requested_t.process_ts_payload
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*/
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static status_t process_ts_payload(private_ike_auth_requested_t *this, bool ts_initiator, ts_payload_t *ts_payload)
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{
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traffic_selector_t **ts_received, **ts_selected;
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size_t ts_received_count, ts_selected_count;
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status_t status = SUCCESS;
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/* get ts form payload */
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ts_received_count = ts_payload->get_traffic_selectors(ts_payload, &ts_received);
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/* select ts depending on payload type */
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if (ts_initiator)
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{
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ts_selected_count = this->sa_config->select_traffic_selectors_initiator(this->sa_config, ts_received, ts_received_count, &ts_selected);
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}
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else
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{
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ts_selected_count = this->sa_config->select_traffic_selectors_responder(this->sa_config, ts_received, ts_received_count, &ts_selected);
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}
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/* check if the responder selected valid proposals */
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if (ts_selected_count != ts_received_count)
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{
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this->logger->log(this->logger, ERROR, "responder selected invalid traffic selectors");
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status = DELETE_ME;
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}
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/* cleanup */
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while(ts_received_count--)
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{
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traffic_selector_t *ts = *ts_received + ts_received_count;
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ts->destroy(ts);
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}
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allocator_free(ts_received);
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while(ts_selected_count--)
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{
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traffic_selector_t *ts = *ts_selected + ts_selected_count;
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ts->destroy(ts);
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}
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allocator_free(ts_selected);
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return status;
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}
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/**
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* Implements state_t.get_state
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*/
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static ike_sa_state_t get_state(private_ike_auth_requested_t *this)
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{
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return IKE_AUTH_REQUESTED;
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}
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/**
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* Implements state_t.get_state
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*/
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static void destroy(private_ike_auth_requested_t *this)
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{
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allocator_free_chunk(&(this->received_nonce));
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allocator_free_chunk(&(this->sent_nonce));
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allocator_free_chunk(&(this->ike_sa_init_reply_data));
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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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ike_auth_requested_t *ike_auth_requested_create(protected_ike_sa_t *ike_sa,chunk_t sent_nonce,chunk_t received_nonce,chunk_t ike_sa_init_reply_data)
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{
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private_ike_auth_requested_t *this = allocator_alloc_thing(private_ike_auth_requested_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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/* private functions */
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this->process_idr_payload = process_idr_payload;
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this->process_sa_payload = process_sa_payload;
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this->process_auth_payload = process_auth_payload;
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this->process_ts_payload = process_ts_payload;
|
|
|
|
/* private data */
|
|
this->ike_sa = ike_sa;
|
|
this->received_nonce = received_nonce;
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|
this->sent_nonce = sent_nonce;
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|
this->ike_sa_init_reply_data = ike_sa_init_reply_data;
|
|
this->logger = this->ike_sa->get_logger(this->ike_sa);
|
|
|
|
return &(this->public);
|
|
}
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