Separated libcharon/sa directory with ikev1 and ikev2 subfolders
This commit is contained in:
Martin Willi
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/*
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* Copyright (C) 2008 Tobias Brunner
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* Copyright (C) 2006-2009 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_post.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 <encoding/payloads/auth_payload.h>
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#include <credentials/certificates/x509.h>
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typedef struct private_ike_cert_post_t private_ike_cert_post_t;
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/**
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* Private members of a ike_cert_post_t task.
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*/
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struct private_ike_cert_post_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_post_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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* Generates the cert payload, if possible with "Hash and URL"
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*/
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static cert_payload_t *build_cert_payload(private_ike_cert_post_t *this,
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certificate_t *cert)
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{
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hasher_t *hasher;
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identification_t *id;
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chunk_t hash, encoded ;
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enumerator_t *enumerator;
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char *url;
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cert_payload_t *payload = NULL;
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if (!this->ike_sa->supports_extension(this->ike_sa, EXT_HASH_AND_URL))
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{
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return cert_payload_create_from_cert(CERTIFICATE, cert);
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}
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hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
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if (!hasher)
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{
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DBG1(DBG_IKE, "unable to use hash-and-url: sha1 not supported");
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return cert_payload_create_from_cert(CERTIFICATE, cert);
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}
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if (!cert->get_encoding(cert, CERT_ASN1_DER, &encoded))
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{
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DBG1(DBG_IKE, "encoding certificate for cert payload failed");
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hasher->destroy(hasher);
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return NULL;
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}
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hasher->allocate_hash(hasher, encoded, &hash);
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chunk_free(&encoded);
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hasher->destroy(hasher);
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id = identification_create_from_encoding(ID_KEY_ID, hash);
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enumerator = lib->credmgr->create_cdp_enumerator(lib->credmgr, CERT_X509, id);
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if (enumerator->enumerate(enumerator, &url))
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{
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payload = cert_payload_create_from_hash_and_url(hash, url);
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DBG1(DBG_IKE, "sending hash-and-url \"%s\"", url);
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}
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else
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{
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payload = cert_payload_create_from_cert(CERTIFICATE, cert);
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}
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enumerator->destroy(enumerator);
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chunk_free(&hash);
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id->destroy(id);
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return payload;
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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_post_t *this, message_t *message)
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{
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peer_cfg_t *peer_cfg;
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auth_payload_t *payload;
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payload = (auth_payload_t*)message->get_payload(message, AUTHENTICATION);
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peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
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if (!peer_cfg || !payload || payload->get_auth_method(payload) == AUTH_PSK)
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{ /* no CERT payload for EAP/PSK */
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return;
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}
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switch (peer_cfg->get_cert_policy(peer_cfg))
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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->ike_sa->has_condition(this->ike_sa, COND_CERTREQ_SEEN))
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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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cert_payload_t *payload;
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enumerator_t *enumerator;
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certificate_t *cert;
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auth_rule_t type;
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auth_cfg_t *auth;
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auth = this->ike_sa->get_auth_cfg(this->ike_sa, TRUE);
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/* get subject cert first, then issuing certificates */
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cert = auth->get(auth, AUTH_RULE_SUBJECT_CERT);
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if (!cert)
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{
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break;
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}
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payload = build_cert_payload(this, cert);
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if (!payload)
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{
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break;
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}
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DBG1(DBG_IKE, "sending end entity cert \"%Y\"",
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cert->get_subject(cert));
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message->add_payload(message, (payload_t*)payload);
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enumerator = auth->create_enumerator(auth);
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while (enumerator->enumerate(enumerator, &type, &cert))
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{
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if (type == AUTH_RULE_IM_CERT)
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{
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payload = cert_payload_create_from_cert(CERTIFICATE, cert);
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if (payload)
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{
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DBG1(DBG_IKE, "sending issuer cert \"%Y\"",
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cert->get_subject(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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enumerator->destroy(enumerator);
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}
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}
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}
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METHOD(task_t, build_i, status_t,
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private_ike_cert_post_t *this, message_t *message)
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{
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build_certs(this, message);
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return NEED_MORE;
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}
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METHOD(task_t, process_r, status_t,
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private_ike_cert_post_t *this, message_t *message)
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{
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return NEED_MORE;
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}
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METHOD(task_t, build_r, status_t,
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private_ike_cert_post_t *this, message_t *message)
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{
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build_certs(this, message);
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if (this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED)
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{ /* stay alive, we might have additional rounds with certs */
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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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METHOD(task_t, process_i, status_t,
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private_ike_cert_post_t *this, message_t *message)
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{
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if (this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED)
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{ /* stay alive, we might have additional rounds with CERTS */
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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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METHOD(task_t, get_type, task_type_t,
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private_ike_cert_post_t *this)
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{
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return TASK_IKE_CERT_POST;
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}
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METHOD(task_t, migrate, void,
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private_ike_cert_post_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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METHOD(task_t, destroy, void,
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private_ike_cert_post_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_post_t *ike_cert_post_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_cert_post_t *this;
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INIT(this,
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.public = {
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.task = {
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.get_type = _get_type,
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.migrate = _migrate,
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.destroy = _destroy,
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},
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},
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.ike_sa = ike_sa,
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.initiator = initiator,
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);
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if (initiator)
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{
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this->public.task.build = _build_i;
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this->public.task.process = _process_i;
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}
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else
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{
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this->public.task.build = _build_r;
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this->public.task.process = _process_r;
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}
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return &this->public;
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}
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