merged the modularization branch (credentials) back to trunk
This commit is contained in:
Martin Willi
@@ -0,0 +1,346 @@
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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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* $Id$
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*/
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#include "ike_cert_pre.h"
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#include <daemon.h>
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#include <sa/ike_sa.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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#include <credentials/certificates/x509.h>
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typedef struct private_ike_cert_pre_t private_ike_cert_pre_t;
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/**
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* Private members of a ike_cert_pre_t task.
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*/
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struct private_ike_cert_pre_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_pre_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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/**
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* read certificate requests
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*/
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static void process_certreqs(private_ike_cert_pre_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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auth_info_t *auth;
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bool ca_found = FALSE;
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auth = this->ike_sa->get_my_auth(this->ike_sa);
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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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chunk_t keyid;
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enumerator_t *enumerator;
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this->ike_sa->set_condition(this->ike_sa, COND_CERTREQ_SEEN, TRUE);
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if (certreq->get_cert_type(certreq) != CERT_X509)
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{
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DBG1(DBG_IKE, "cert payload %N not supported - ignored",
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certificate_type_names, certreq->get_cert_type(certreq));
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continue;
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}
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enumerator = certreq->create_keyid_enumerator(certreq);
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while (enumerator->enumerate(enumerator, &keyid))
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{
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identification_t *id;
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certificate_t *cert;
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id = identification_create_from_encoding(
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ID_PUBKEY_INFO_SHA1, keyid);
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cert = charon->credentials->get_cert(charon->credentials,
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CERT_X509, KEY_ANY, id, TRUE);
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if (cert)
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{
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DBG1(DBG_IKE, "received cert request for %D",
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cert->get_subject(cert));
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auth->add_item(auth, AUTHN_CA_CERT, cert);
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cert->destroy(cert);
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ca_found = TRUE;
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}
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id->destroy(id);
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}
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enumerator->destroy(enumerator);
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}
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}
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iterator->destroy(iterator);
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if (this->ike_sa->has_condition(this->ike_sa, COND_CERTREQ_SEEN) && !ca_found)
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{
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DBG1(DBG_IKE, "received cert request, but no such CA cert found");
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}
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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_pre_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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auth_info_t *auth;
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bool first = TRUE;
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auth = this->ike_sa->get_other_auth(this->ike_sa);
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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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certificate_t *cert;
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cert_payload_t *cert_payload = (cert_payload_t*)payload;
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cert = cert_payload->get_cert(cert_payload);
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if (cert)
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{
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if (first)
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{ /* the first certificate MUST be an end entity one */
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DBG1(DBG_IKE, "received end entity cert %D",
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cert->get_subject(cert));
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auth->add_item(auth, AUTHN_SUBJECT_CERT, cert);
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first = FALSE;
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}
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else
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{
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DBG1(DBG_IKE, "received issuer cert %D",
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cert->get_subject(cert));
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auth->add_item(auth, AUTHN_IM_CERT, cert);
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}
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}
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cert->destroy(cert);
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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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* add a certificate request to the message, building request payload if required.
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*/
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static void add_certreq_payload(message_t *message, certreq_payload_t **reqp,
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certificate_t *cert)
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{
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public_key_t *public;
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certreq_payload_t *req;
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public = cert->get_public_key(cert);
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if (!public)
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{
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return;
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}
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switch (cert->get_type(cert))
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{
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case CERT_X509:
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{
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identification_t *keyid;
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x509_t *x509 = (x509_t*)cert;
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if (!(x509->get_flags(x509) & X509_CA))
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{ /* no CA cert, skip */
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break;
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}
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if (*reqp == NULL)
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{
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*reqp = certreq_payload_create_type(CERT_X509);
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message->add_payload(message, (payload_t*)*reqp);
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}
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req = *reqp;
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keyid = public->get_id(public, ID_PUBKEY_INFO_SHA1);
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req->add_keyid(req, keyid->get_encoding(keyid));
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DBG1(DBG_IKE, "sending cert request for %D",
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cert->get_subject(cert));
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break;
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}
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default:
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break;
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}
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public->destroy(public);
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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_pre_t *this, message_t *message)
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{
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ike_cfg_t *ike_cfg;
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enumerator_t *enumerator;
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certificate_t *cert;
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auth_info_t *auth;
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bool restricted = FALSE;
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auth_item_t item;
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certreq_payload_t *x509_req = NULL;
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ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
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if (ike_cfg->send_certreq(ike_cfg) == CERT_NEVER_SEND)
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{
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return;
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}
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auth = this->ike_sa->get_other_auth(this->ike_sa);
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/* check if we require a specific CA for that peer */
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enumerator = auth->create_item_enumerator(auth);
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while (enumerator->enumerate(enumerator, &item, &cert))
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{
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if (item == AUTHN_CA_CERT)
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{
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restricted = TRUE;
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add_certreq_payload(message, &x509_req, cert);
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}
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}
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enumerator->destroy(enumerator);
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if (!restricted)
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{
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/* otherwise include all trusted CA certificates */
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enumerator = charon->credentials->create_cert_enumerator(
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charon->credentials, CERT_ANY, KEY_ANY, NULL, TRUE);
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while (enumerator->enumerate(enumerator, &cert, TRUE))
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{
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add_certreq_payload(message, &x509_req, cert);
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}
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enumerator->destroy(enumerator);
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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_pre_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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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_pre_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_pre_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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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_pre_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_pre_t *this)
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{
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return IKE_CERT_PRE;
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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_pre_t *this, ike_sa_t *ike_sa)
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{
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this->ike_sa = ike_sa;
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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_pre_t *this)
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{
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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_pre_t *ike_cert_pre_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_cert_pre_t *this = malloc_thing(private_ike_cert_pre_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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return &this->public;
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}
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