merged tasking branch into trunk
This commit is contained in:
Martin Willi
@@ -0,0 +1,513 @@
|
||||
/**
|
||||
* @file ike_auth.c
|
||||
*
|
||||
* @brief Implementation of the ike_auth task.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005-2007 Martin Willi
|
||||
* Copyright (C) 2005 Jan Hutter
|
||||
* 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 <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* 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_auth.h"
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#include <daemon.h>
|
||||
#include <crypto/diffie_hellman.h>
|
||||
#include <encoding/payloads/id_payload.h>
|
||||
#include <encoding/payloads/auth_payload.h>
|
||||
#include <encoding/payloads/nonce_payload.h>
|
||||
|
||||
|
||||
typedef struct private_ike_auth_t private_ike_auth_t;
|
||||
|
||||
/**
|
||||
* Private members of a ike_auth_t task.
|
||||
*/
|
||||
struct private_ike_auth_t {
|
||||
|
||||
/**
|
||||
* Public methods and task_t interface.
|
||||
*/
|
||||
ike_auth_t public;
|
||||
|
||||
/**
|
||||
* Assigned IKE_SA.
|
||||
*/
|
||||
ike_sa_t *ike_sa;
|
||||
|
||||
/**
|
||||
* Are we the initiator?
|
||||
*/
|
||||
bool initiator;
|
||||
|
||||
/**
|
||||
* Nonce chosen by us in ike_init
|
||||
*/
|
||||
chunk_t my_nonce;
|
||||
|
||||
/**
|
||||
* Nonce chosen by peer in ike_init
|
||||
*/
|
||||
chunk_t other_nonce;
|
||||
|
||||
/**
|
||||
* IKE_SA_INIT message sent by us
|
||||
*/
|
||||
packet_t *my_packet;
|
||||
|
||||
/**
|
||||
* IKE_SA_INIT message sent by peer
|
||||
*/
|
||||
packet_t *other_packet;
|
||||
|
||||
/**
|
||||
* authenticator to authenticate us
|
||||
*/
|
||||
authenticator_t *my_auth;
|
||||
|
||||
/**
|
||||
* authenticator to authenticate peer
|
||||
*/
|
||||
authenticator_t *other_auth;
|
||||
|
||||
/**
|
||||
* has the peer been authenticated successfully?
|
||||
*/
|
||||
bool peer_authenticated;
|
||||
};
|
||||
|
||||
/**
|
||||
* build the payloads for the message
|
||||
*/
|
||||
static status_t build_payloads(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
authenticator_t *auth;
|
||||
auth_payload_t *auth_payload;
|
||||
id_payload_t *id_payload;
|
||||
chunk_t ike_sa_init;
|
||||
identification_t *me, *other;
|
||||
policy_t *policy;
|
||||
auth_method_t method = AUTH_RSA;
|
||||
status_t status;
|
||||
|
||||
/* add own ID payload */
|
||||
me = this->ike_sa->get_my_id(this->ike_sa);
|
||||
other = this->ike_sa->get_other_id(this->ike_sa);
|
||||
|
||||
id_payload = id_payload_create_from_identification(this->initiator, me);
|
||||
message->add_payload(message, (payload_t*)id_payload);
|
||||
|
||||
/* as initiator, include other ID if it does not contain wildcards */
|
||||
if (this->initiator && !other->contains_wildcards(other))
|
||||
{
|
||||
id_payload = id_payload_create_from_identification(FALSE, other);
|
||||
message->add_payload(message, (payload_t*)id_payload);
|
||||
}
|
||||
|
||||
/* create own authenticator and add auth payload */
|
||||
policy = this->ike_sa->get_policy(this->ike_sa);
|
||||
if (policy)
|
||||
{
|
||||
method = policy->get_auth_method(policy);
|
||||
}
|
||||
auth = authenticator_create(this->ike_sa, method);
|
||||
if (auth == NULL)
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "configured authentication method %N not supported",
|
||||
auth_method_names, method);
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
ike_sa_init = this->my_packet->get_data(this->my_packet);
|
||||
status = auth->build(auth, ike_sa_init, this->other_nonce, &auth_payload);
|
||||
auth->destroy(auth);
|
||||
if (status != SUCCESS)
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "generating authentication data failed");
|
||||
return FAILED;
|
||||
}
|
||||
message->add_payload(message, (payload_t*)auth_payload);
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* process payloads from message
|
||||
*/
|
||||
static void process_payloads(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
iterator_t *iterator;
|
||||
payload_t *payload;
|
||||
payload_type_t type;
|
||||
identification_t *idi = NULL, *idr = NULL;
|
||||
auth_payload_t *auth_payload = NULL;
|
||||
authenticator_t *auth;
|
||||
auth_method_t auth_method;
|
||||
status_t status;
|
||||
|
||||
iterator = message->get_payload_iterator(message);
|
||||
while (iterator->iterate(iterator, (void**)&payload))
|
||||
{
|
||||
type = payload->get_type(payload);
|
||||
switch (type)
|
||||
{
|
||||
case ID_INITIATOR:
|
||||
{
|
||||
id_payload_t *id_payload = (id_payload_t*)payload;
|
||||
idi = id_payload->get_identification(id_payload);
|
||||
break;
|
||||
}
|
||||
case ID_RESPONDER:
|
||||
{
|
||||
id_payload_t *id_payload = (id_payload_t*)payload;
|
||||
idr = id_payload->get_identification(id_payload);
|
||||
break;
|
||||
}
|
||||
case AUTHENTICATION:
|
||||
{
|
||||
auth_payload = (auth_payload_t*)payload;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
iterator->destroy(iterator);
|
||||
|
||||
/* apply IDs */
|
||||
if ((this->initiator && idr == NULL) || (!this->initiator && idi == NULL))
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "ID payload missing in message");
|
||||
DESTROY_IF(idr); DESTROY_IF(idi);
|
||||
return;
|
||||
}
|
||||
|
||||
if (this->initiator)
|
||||
{
|
||||
identification_t *other_id = this->ike_sa->get_other_id(this->ike_sa);
|
||||
if (!idr->matches(idr, other_id, NULL))
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "received inacceptable id %D, %D required", idr,
|
||||
this->ike_sa->get_other_id(this->ike_sa));
|
||||
DESTROY_IF(idi); DESTROY_IF(idr);
|
||||
return;
|
||||
}
|
||||
this->ike_sa->set_other_id(this->ike_sa, idr);
|
||||
}
|
||||
else
|
||||
{
|
||||
identification_t *my_id = this->ike_sa->get_other_id(this->ike_sa);
|
||||
if (idr)
|
||||
{
|
||||
if (!idr->matches(idr, my_id, NULL))
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "received inacceptable id %D, %D required",
|
||||
idr, this->ike_sa->get_other_id(this->ike_sa));
|
||||
DESTROY_IF(idi); DESTROY_IF(idr);
|
||||
return;
|
||||
}
|
||||
this->ike_sa->set_my_id(this->ike_sa, idr);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (my_id->contains_wildcards(my_id))
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "own ID (%D) not defined after exchange",
|
||||
my_id);
|
||||
DESTROY_IF(idi);
|
||||
return;
|
||||
}
|
||||
}
|
||||
this->ike_sa->set_other_id(this->ike_sa, idi);
|
||||
}
|
||||
|
||||
/* verify auth payload */
|
||||
if (auth_payload == NULL)
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "AUTH payload missing in message");
|
||||
return;
|
||||
}
|
||||
|
||||
auth_method = auth_payload->get_auth_method(auth_payload);
|
||||
auth = authenticator_create(this->ike_sa, auth_method);
|
||||
if (auth == NULL)
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "authentication method %N used by %D not "
|
||||
"supported", auth_method_names, auth_method,
|
||||
this->ike_sa->get_other_id(this->ike_sa));
|
||||
return;
|
||||
}
|
||||
status = auth->verify(auth, this->other_packet->get_data(this->other_packet),
|
||||
this->my_nonce, auth_payload);
|
||||
auth->destroy(auth);
|
||||
if (status != SUCCESS)
|
||||
{
|
||||
SIG(IKE_UP_FAILED, "authentication of %D using %N failed",
|
||||
this->ike_sa->get_other_id(this->ike_sa),
|
||||
auth_method_names, auth_method);
|
||||
return;
|
||||
}
|
||||
this->peer_authenticated = TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* collect the needed information in the IKE_SA_INIT exchange from our message
|
||||
*/
|
||||
static status_t collect_my_init_data(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
nonce_payload_t *nonce;
|
||||
|
||||
/* get the nonce that was generated in ike_init */
|
||||
nonce = (nonce_payload_t*)message->get_payload(message, NONCE);
|
||||
if (nonce == NULL)
|
||||
{
|
||||
return FAILED;
|
||||
}
|
||||
this->my_nonce = nonce->get_nonce(nonce);
|
||||
|
||||
/* pre-generate the message, so we can store it for us */
|
||||
if (this->ike_sa->generate_message(this->ike_sa, message,
|
||||
&this->my_packet) != SUCCESS)
|
||||
{
|
||||
return FAILED;
|
||||
}
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
/**
|
||||
* collect the needed information in the IKE_SA_INIT exchange from others message
|
||||
*/
|
||||
static status_t collect_other_init_data(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
/* we collect the needed information in the IKE_SA_INIT exchange */
|
||||
nonce_payload_t *nonce;
|
||||
|
||||
/* get the nonce that was generated in ike_init */
|
||||
nonce = (nonce_payload_t*)message->get_payload(message, NONCE);
|
||||
if (nonce == NULL)
|
||||
{
|
||||
return FAILED;
|
||||
}
|
||||
this->other_nonce = nonce->get_nonce(nonce);
|
||||
|
||||
/* pre-generate the message, so we can store it for us */
|
||||
this->other_packet = message->get_packet(message);
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.build for initiator
|
||||
*/
|
||||
static status_t build_i(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
if (message->get_exchange_type(message) == IKE_SA_INIT)
|
||||
{
|
||||
return collect_my_init_data(this, message);
|
||||
}
|
||||
|
||||
if (build_payloads(this, message) == SUCCESS)
|
||||
{
|
||||
return NEED_MORE;
|
||||
}
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.process for initiator
|
||||
*/
|
||||
static status_t process_r(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
if (message->get_exchange_type(message) == IKE_SA_INIT)
|
||||
{
|
||||
return collect_other_init_data(this, message);
|
||||
}
|
||||
|
||||
process_payloads(this, message);
|
||||
|
||||
return NEED_MORE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.build for responder
|
||||
*/
|
||||
static status_t build_r(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
if (message->get_exchange_type(message) == IKE_SA_INIT)
|
||||
{
|
||||
return collect_my_init_data(this, message);
|
||||
}
|
||||
|
||||
if (!this->peer_authenticated)
|
||||
{
|
||||
message->add_notify(message, TRUE, AUTHENTICATION_FAILED, chunk_empty);
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
if (build_payloads(this, message) == SUCCESS)
|
||||
{
|
||||
this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
|
||||
SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
|
||||
this->ike_sa->get_my_id(this->ike_sa),
|
||||
this->ike_sa->get_my_host(this->ike_sa),
|
||||
this->ike_sa->get_other_host(this->ike_sa),
|
||||
this->ike_sa->get_other_id(this->ike_sa));
|
||||
return SUCCESS;
|
||||
}
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.process for initiator
|
||||
*/
|
||||
static status_t process_i(private_ike_auth_t *this, message_t *message)
|
||||
{
|
||||
iterator_t *iterator;
|
||||
payload_t *payload;
|
||||
|
||||
if (message->get_exchange_type(message) == IKE_SA_INIT)
|
||||
{
|
||||
return collect_other_init_data(this, message);
|
||||
}
|
||||
|
||||
iterator = message->get_payload_iterator(message);
|
||||
while (iterator->iterate(iterator, (void**)&payload))
|
||||
{
|
||||
if (payload->get_type(payload) == NOTIFY)
|
||||
{
|
||||
notify_payload_t *notify = (notify_payload_t*)payload;
|
||||
notify_type_t type = notify->get_notify_type(notify);
|
||||
|
||||
switch (type)
|
||||
{
|
||||
case NO_PROPOSAL_CHOSEN:
|
||||
case SINGLE_PAIR_REQUIRED:
|
||||
case NO_ADDITIONAL_SAS:
|
||||
case INTERNAL_ADDRESS_FAILURE:
|
||||
case FAILED_CP_REQUIRED:
|
||||
case TS_UNACCEPTABLE:
|
||||
case INVALID_SELECTORS:
|
||||
/* these are errors, but are not critical as only the
|
||||
* CHILD_SA won't get build, but IKE_SA establishes anyway */
|
||||
DBG1(DBG_IKE, "received %N notify, no CHILD_SA built",
|
||||
notify_type_names, type);
|
||||
iterator->destroy(iterator);
|
||||
return SUCCESS;
|
||||
default:
|
||||
{
|
||||
if (type < 16383)
|
||||
{
|
||||
DBG1(DBG_IKE, "received %N notify error",
|
||||
notify_type_names, type);
|
||||
iterator->destroy(iterator);
|
||||
return FAILED;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
iterator->destroy(iterator);
|
||||
|
||||
process_payloads(this, message);
|
||||
|
||||
if (this->peer_authenticated)
|
||||
{
|
||||
this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
|
||||
SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
|
||||
this->ike_sa->get_my_id(this->ike_sa),
|
||||
this->ike_sa->get_my_host(this->ike_sa),
|
||||
this->ike_sa->get_other_host(this->ike_sa),
|
||||
this->ike_sa->get_other_id(this->ike_sa));
|
||||
return SUCCESS;
|
||||
}
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.get_type
|
||||
*/
|
||||
static task_type_t get_type(private_ike_auth_t *this)
|
||||
{
|
||||
return IKE_AUTHENTICATE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.migrate
|
||||
*/
|
||||
static void migrate(private_ike_auth_t *this, ike_sa_t *ike_sa)
|
||||
{
|
||||
chunk_free(&this->my_nonce);
|
||||
chunk_free(&this->other_nonce);
|
||||
DESTROY_IF(this->my_packet);
|
||||
DESTROY_IF(this->other_packet);
|
||||
DESTROY_IF(this->my_auth);
|
||||
DESTROY_IF(this->other_auth);
|
||||
this->my_packet = NULL;
|
||||
this->other_packet = NULL;
|
||||
this->my_auth = NULL;
|
||||
this->other_auth = NULL;
|
||||
this->peer_authenticated = FALSE;
|
||||
this->ike_sa = ike_sa;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of task_t.destroy
|
||||
*/
|
||||
static void destroy(private_ike_auth_t *this)
|
||||
{
|
||||
chunk_free(&this->my_nonce);
|
||||
chunk_free(&this->other_nonce);
|
||||
DESTROY_IF(this->my_packet);
|
||||
DESTROY_IF(this->other_packet);
|
||||
DESTROY_IF(this->my_auth);
|
||||
DESTROY_IF(this->other_auth);
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header.
|
||||
*/
|
||||
ike_auth_t *ike_auth_create(ike_sa_t *ike_sa, bool initiator)
|
||||
{
|
||||
private_ike_auth_t *this = malloc_thing(private_ike_auth_t);
|
||||
|
||||
this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
|
||||
this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
|
||||
this->public.task.destroy = (void(*)(task_t*))destroy;
|
||||
|
||||
if (initiator)
|
||||
{
|
||||
this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
|
||||
this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
|
||||
}
|
||||
else
|
||||
{
|
||||
this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
|
||||
this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
|
||||
}
|
||||
|
||||
this->ike_sa = ike_sa;
|
||||
this->initiator = initiator;
|
||||
this->my_nonce = chunk_empty;
|
||||
this->other_nonce = chunk_empty;
|
||||
this->my_packet = NULL;
|
||||
this->other_packet = NULL;
|
||||
this->my_auth = NULL;
|
||||
this->other_auth = NULL;
|
||||
this->peer_authenticated = FALSE;
|
||||
|
||||
return &this->public;
|
||||
}
|
||||
Reference in New Issue
Block a user