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/*
* Copyright (C) 2015-2020 "IoT.bzh"
* Author: José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdint.h>
#include "afb-context.h"
#include "afb-cred.h"
#include "afb-token.h"
#include "afb-session.h"
#include "verbose.h"
/*********************************************************************************/
static inline const char *session_of_context(struct afb_context *context)
{
return context->token ? afb_token_string(context->token)
: context->session ? afb_session_uuid(context->session)
: "";
}
/*********************************************************************************/
#ifdef BACKEND_PERMISSION_IS_CYNARA
#include <pthread.h>
#include <cynara-client.h>
static cynara *handle;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
int afb_perm_check(struct afb_context *context, const char *permission)
{
int rc;
if (!context->credentials) {
/* case of permission for self */
return 1;
}
if (!permission) {
ERROR("Got a null permission!");
return 0;
}
/* cynara isn't reentrant */
pthread_mutex_lock(&mutex);
/* lazy initialisation */
if (!handle) {
rc = cynara_initialize(&handle, NULL);
if (rc != CYNARA_API_SUCCESS) {
handle = NULL;
ERROR("cynara initialisation failed with code %d", rc);
return 0;
}
}
/* query cynara permission */
rc = cynara_check(handle, context->credentials->label, session_of_context(context), context->credentials->user, permission);
pthread_mutex_unlock(&mutex);
return rc == CYNARA_API_ACCESS_ALLOWED;
}
/*********************************************************************************/
#else
int afb_perm_check(struct afb_context *context, const char *permission)
{
NOTICE("Granting permission %s by default of backend", permission ?: "(null)");
return !!permission;
}
#endif
void afb_perm_check_async(
struct afb_context *context,
const char *permission,
void (*callback)(void *closure, int status),
void *closure
)
{
callback(closure, afb_perm_check(context, permission));
}
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