merged tasking branch into trunk
This commit is contained in:
Martin Willi
@@ -0,0 +1,361 @@
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/**
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* @file ike_cert.c
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*
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* @brief Implementation of the ike_cert task.
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*
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*/
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/*
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* Copyright (C) 2006-2007 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_cert.h"
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#include <daemon.h>
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#include <sa/ike_sa.h>
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#include <crypto/hashers/hasher.h>
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#include <encoding/payloads/cert_payload.h>
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#include <encoding/payloads/certreq_payload.h>
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typedef struct private_ike_cert_t private_ike_cert_t;
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/**
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* Private members of a ike_cert_t task.
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*/
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struct private_ike_cert_t {
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/**
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* Public methods and task_t interface.
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*/
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ike_cert_t public;
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/**
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* Assigned IKE_SA.
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*/
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ike_sa_t *ike_sa;
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/**
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* Are we the initiator?
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*/
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bool initiator;
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/**
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* list of CA cert hashes requested, items point to 20 byte chunk
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*/
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linked_list_t *cas;
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};
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/**
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* read certificate requests
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*/
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static void process_certreqs(private_ike_cert_t *this, message_t *message)
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{
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iterator_t *iterator;
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payload_t *payload;
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iterator = message->get_payload_iterator(message);
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while (iterator->iterate(iterator, (void**)&payload))
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{
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if (payload->get_type(payload) == CERTIFICATE_REQUEST)
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{
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certreq_payload_t *certreq = (certreq_payload_t*)payload;
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cert_encoding_t encoding;
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chunk_t keyids, keyid;
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encoding = certreq->get_cert_encoding(certreq);
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if (encoding != CERT_X509_SIGNATURE)
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{
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DBG1(DBG_IKE, "certreq payload %N not supported, ignored",
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cert_encoding_names, encoding);
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continue;
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}
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keyids = certreq->get_data(certreq);
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while (keyids.len >= HASH_SIZE_SHA1)
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{
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keyid = chunk_create(keyids.ptr, HASH_SIZE_SHA1);
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keyid = chunk_clone(keyid);
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this->cas->insert_last(this->cas, keyid.ptr);
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keyids = chunk_skip(keyids, HASH_SIZE_SHA1);
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}
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}
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}
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iterator->destroy(iterator);
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}
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/**
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* import certificates
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*/
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static void process_certs(private_ike_cert_t *this, message_t *message)
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{
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iterator_t *iterator;
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payload_t *payload;
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iterator = message->get_payload_iterator(message);
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while (iterator->iterate(iterator, (void**)&payload))
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{
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if (payload->get_type(payload) == CERTIFICATE)
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{
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cert_encoding_t encoding;
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x509_t *cert;
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chunk_t cert_data;
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bool found;
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cert_payload_t *cert_payload = (cert_payload_t*)payload;
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encoding = cert_payload->get_cert_encoding(cert_payload);
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if (encoding != CERT_X509_SIGNATURE)
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{
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DBG1(DBG_IKE, "certificate payload %N not supported, ignored",
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cert_encoding_names, encoding);
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continue;
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}
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cert_data = cert_payload->get_data_clone(cert_payload);
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cert = x509_create_from_chunk(cert_data);
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if (cert)
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{
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if (charon->credentials->verify(charon->credentials,
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cert, &found))
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{
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DBG2(DBG_IKE, "received end entity certificate is trusted, "
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"added to store");
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if (!found)
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{
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charon->credentials->add_end_certificate(
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charon->credentials, cert);
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}
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else
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{
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cert->destroy(cert);
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}
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}
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else
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{
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DBG1(DBG_IKE, "received end entity certificate is not "
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"trusted, discarded");
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cert->destroy(cert);
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}
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}
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else
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{
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DBG1(DBG_IKE, "parsing of received certificate failed, discarded");
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chunk_free(&cert_data);
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}
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}
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}
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iterator->destroy(iterator);
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}
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/**
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* build certificate requests
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*/
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static void build_certreqs(private_ike_cert_t *this, message_t *message)
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{
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connection_t *connection;
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policy_t *policy;
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identification_t *ca;
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certreq_payload_t *certreq;
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connection = this->ike_sa->get_connection(this->ike_sa);
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if (connection->get_certreq_policy(connection) != CERT_NEVER_SEND)
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{
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policy = this->ike_sa->get_policy(this->ike_sa);
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if (policy)
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{
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ca = policy->get_other_ca(policy);
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if (ca && ca->get_type(ca) != ID_ANY)
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{
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certreq = certreq_payload_create_from_cacert(ca);
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}
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else
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{
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certreq = certreq_payload_create_from_cacerts();
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}
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}
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else
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{
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certreq = certreq_payload_create_from_cacerts();
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}
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if (certreq)
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{
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message->add_payload(message, (payload_t*)certreq);
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}
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}
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}
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/**
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* add certificates to message
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*/
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static void build_certs(private_ike_cert_t *this, message_t *message)
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{
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policy_t *policy;
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connection_t *connection;
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x509_t *cert;
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cert_payload_t *payload;
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policy = this->ike_sa->get_policy(this->ike_sa);
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connection = this->ike_sa->get_connection(this->ike_sa);
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if (policy && policy->get_auth_method(policy) == AUTH_RSA)
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{
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switch (connection->get_cert_policy(connection))
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{
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case CERT_NEVER_SEND:
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break;
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case CERT_SEND_IF_ASKED:
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if (this->cas->get_count(this->cas) == 0)
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{
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break;
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}
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/* FALL */
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case CERT_ALWAYS_SEND:
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{
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/* TODO: respect CA cert request */
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cert = charon->credentials->get_certificate(charon->credentials,
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policy->get_my_id(policy));
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if (cert)
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{
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payload = cert_payload_create_from_x509(cert);
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message->add_payload(message, (payload_t*)payload);
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}
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}
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}
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}
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}
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/**
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* Implementation of task_t.process for initiator
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*/
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static status_t build_i(private_ike_cert_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_SA_INIT)
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{
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return NEED_MORE;
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}
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build_certreqs(this, message);
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build_certs(this, message);
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.process for responder
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*/
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static status_t process_r(private_ike_cert_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_SA_INIT)
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{
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return NEED_MORE;
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}
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process_certreqs(this, message);
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process_certs(this, message);
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return NEED_MORE;
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}
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/**
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* Implementation of task_t.build for responder
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*/
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static status_t build_r(private_ike_cert_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_SA_INIT)
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{
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build_certreqs(this, message);
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return NEED_MORE;
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}
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build_certs(this, message);
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return SUCCESS;
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}
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/**
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* Implementation of task_t.process for initiator
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*/
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static status_t process_i(private_ike_cert_t *this, message_t *message)
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{
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if (message->get_exchange_type(message) == IKE_SA_INIT)
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{
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process_certreqs(this, message);
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return NEED_MORE;
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}
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process_certs(this, message);
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return SUCCESS;
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}
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/**
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* Implementation of task_t.get_type
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*/
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static task_type_t get_type(private_ike_cert_t *this)
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{
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return IKE_CERT;
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}
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/**
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* Implementation of task_t.migrate
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*/
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static void migrate(private_ike_cert_t *this, ike_sa_t *ike_sa)
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{
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this->ike_sa = ike_sa;
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this->cas->destroy_function(this->cas, free);
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this->cas = linked_list_create();
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}
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/**
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* Implementation of task_t.destroy
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*/
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static void destroy(private_ike_cert_t *this)
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{
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this->cas->destroy_function(this->cas, free);
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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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ike_cert_t *ike_cert_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_cert_t *this = malloc_thing(private_ike_cert_t);
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this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
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this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
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this->public.task.destroy = (void(*)(task_t*))destroy;
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if (initiator)
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
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}
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else
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{
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this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
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this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
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}
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this->ike_sa = ike_sa;
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this->initiator = initiator;
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this->cas = linked_list_create();
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return &this->public;
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}
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