From 8ce78e43a4746ce4d3d107ef2ed2f4e13f1c9c8f Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Tue, 27 Oct 2015 17:31:43 +0100 Subject: ikev2: Add task that verifies a peer's certificate On failure the SA is deleted and reestablished as configured. The task is activated after the REAUTH_COMPLETE task so a make-before-break reauth is completed before the new SA might get torn down. --- src/libcharon/sa/ikev2/task_manager_v2.c | 5 + .../sa/ikev2/tasks/ike_verify_peer_cert.c | 117 +++++++++++++++++++++ .../sa/ikev2/tasks/ike_verify_peer_cert.h | 54 ++++++++++ 3 files changed, 176 insertions(+) create mode 100644 src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.c create mode 100644 src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.h (limited to 'src/libcharon/sa/ikev2') diff --git a/src/libcharon/sa/ikev2/task_manager_v2.c b/src/libcharon/sa/ikev2/task_manager_v2.c index b7c5f6691..c573c23c8 100644 --- a/src/libcharon/sa/ikev2/task_manager_v2.c +++ b/src/libcharon/sa/ikev2/task_manager_v2.c @@ -527,6 +527,11 @@ METHOD(task_manager_t, initiate, status_t, exchange = INFORMATIONAL; break; } + if (activate_task(this, TASK_IKE_VERIFY_PEER_CERT)) + { + exchange = INFORMATIONAL; + break; + } case IKE_REKEYING: if (activate_task(this, TASK_IKE_DELETE)) { diff --git a/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.c b/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.c new file mode 100644 index 000000000..069d51d00 --- /dev/null +++ b/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.c @@ -0,0 +1,117 @@ +/* + * Copyright (C) 2015 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See . + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include "ike_verify_peer_cert.h" + +#include +#include + +typedef struct private_ike_verify_peer_cert_t private_ike_verify_peer_cert_t; + +/** + * Private members + */ +struct private_ike_verify_peer_cert_t { + + /** + * Public methods and task_t interface. + */ + ike_verify_peer_cert_t public; + + /** + * Assigned IKE_SA. + */ + ike_sa_t *ike_sa; + + /** + * Child ike_delete task, if necessary + */ + ike_delete_t *ike_delete; +}; + +METHOD(task_t, build_i, status_t, + private_ike_verify_peer_cert_t *this, message_t *message) +{ + if (!this->ike_sa->verify_peer_certificate(this->ike_sa)) + { + DBG1(DBG_IKE, "peer certificate verification failed, deleting SA"); + this->ike_delete = ike_delete_create(this->ike_sa, TRUE); + return this->ike_delete->task.build(&this->ike_delete->task, message); + } + DBG1(DBG_IKE, "peer certificate successfully verified"); + message->set_exchange_type(message, EXCHANGE_TYPE_UNDEFINED); + return SUCCESS; +} + +METHOD(task_t, process_i, status_t, + private_ike_verify_peer_cert_t *this, message_t *message) +{ + if (this->ike_delete) + { + this->ike_delete->task.process(&this->ike_delete->task, message); + /* try to reestablish the IKE_SA and all children */ + this->ike_sa->reestablish(this->ike_sa); + } + return DESTROY_ME; +} + +METHOD(task_t, get_type, task_type_t, + private_ike_verify_peer_cert_t *this) +{ + return TASK_IKE_VERIFY_PEER_CERT; +} + +METHOD(task_t, migrate, void, + private_ike_verify_peer_cert_t *this, ike_sa_t *ike_sa) +{ + if (this->ike_delete) + { + this->ike_delete->task.migrate(&this->ike_delete->task, ike_sa); + } + this->ike_sa = ike_sa; +} + +METHOD(task_t, destroy, void, + private_ike_verify_peer_cert_t *this) +{ + if (this->ike_delete) + { + this->ike_delete->task.destroy(&this->ike_delete->task); + } + free(this); +} + +/* + * Described in header. + */ +ike_verify_peer_cert_t *ike_verify_peer_cert_create(ike_sa_t *ike_sa) +{ + private_ike_verify_peer_cert_t *this; + + INIT(this, + .public = { + .task = { + .get_type = _get_type, + .migrate = _migrate, + .build = _build_i, + .process = _process_i, + .destroy = _destroy, + }, + }, + .ike_sa = ike_sa, + ); + + return &this->public; +} diff --git a/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.h b/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.h new file mode 100644 index 000000000..3d9aae0b3 --- /dev/null +++ b/src/libcharon/sa/ikev2/tasks/ike_verify_peer_cert.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2015 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See . + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +/** + * @defgroup ike_verify_peer_cert ike_verify_peer_cert + * @{ @ingroup tasks_v2 + */ + +#ifndef IKE_VERIFY_PEER_CERT_H_ +#define IKE_VERIFY_PEER_CERT_H_ + +typedef struct ike_verify_peer_cert_t ike_verify_peer_cert_t; + +#include +#include +#include + +/** + * Task of type ike_verify_peer_cert, verifies a peer's certificate. + * + * This task (re-)verifies the peer's certificate explicitly including online + * OCSP and CRL checks. + */ +struct ike_verify_peer_cert_t { + + /** + * Implements the task_t interface + */ + task_t task; +}; + +/** + * Create a new ike_verify_peer_cert task. + * + * This task is initiator only. + * + * @param ike_sa IKE_SA this task works for + * @return ike_verify_peer_cert task to handle by the task_manager + */ +ike_verify_peer_cert_t *ike_verify_peer_cert_create(ike_sa_t *ike_sa); + +#endif /** IKE_VERIFY_PEER_CERT_H_ @}*/ -- cgit v1.2.3