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/*
SSSD
Copyright (C) Red Hat, 2020
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 3 of the License, or
(at your option) any later version.
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <talloc.h>
#include "util/util.h"
#include "responder/kcm/kcmsrv_ccache_pvt.h"
/*
* The secrets store is a key-value store at heart. We store the UUID
* and the name in the key to allow easy lookups by either part.
*/
#define SEC_KEY_SEPARATOR '-'
const char *sec_key_create(TALLOC_CTX *mem_ctx,
const char *name,
uuid_t uuid)
{
char uuid_str[UUID_STR_SIZE];
uuid_unparse(uuid, uuid_str);
return talloc_asprintf(mem_ctx,
"%s%c%s", uuid_str, SEC_KEY_SEPARATOR, name);
}
static bool sec_key_valid(const char *sec_key)
{
if (sec_key == NULL) {
return false;
}
if (strlen(sec_key) < UUID_STR_SIZE + 1) {
/* One char for separator (at UUID_STR_SIZE, because strlen doesn't
* include the '\0', but UUID_STR_SIZE does) and at least one for
* the name */
DEBUG(SSSDBG_CRIT_FAILURE, "Key %s is too short\n", sec_key);
return false;
}
if (sec_key[UUID_STR_SIZE - 1] != SEC_KEY_SEPARATOR) {
DEBUG(SSSDBG_CRIT_FAILURE, "Key doesn't contain the separator\n");
return false;
}
return true;
}
errno_t sec_key_parse(TALLOC_CTX *mem_ctx,
const char *sec_key,
const char **_name,
uuid_t uuid)
{
char uuid_str[UUID_STR_SIZE];
if (!sec_key_valid(sec_key)) {
return EINVAL;
}
strncpy(uuid_str, sec_key, sizeof(uuid_str) - 1);
if (sec_key[UUID_STR_SIZE - 1] != SEC_KEY_SEPARATOR) {
DEBUG(SSSDBG_CRIT_FAILURE, "Key doesn't contain the separator\n");
return EINVAL;
}
uuid_str[UUID_STR_SIZE - 1] = '\0';
*_name = talloc_strdup(mem_ctx, sec_key + UUID_STR_SIZE);
if (*_name == NULL) {
return ENOMEM;
}
uuid_parse(uuid_str, uuid);
return EOK;
}
errno_t sec_key_get_uuid(const char *sec_key,
uuid_t uuid)
{
char uuid_str[UUID_STR_SIZE];
if (!sec_key_valid(sec_key)) {
return EINVAL;
}
strncpy(uuid_str, sec_key, UUID_STR_SIZE - 1);
uuid_str[UUID_STR_SIZE - 1] = '\0';
uuid_parse(uuid_str, uuid);
return EOK;
}
const char *sec_key_get_name(const char *sec_key)
{
if (!sec_key_valid(sec_key)) {
return NULL;
}
return sec_key + UUID_STR_SIZE;
}
bool sec_key_match_name(const char *sec_key,
const char *name)
{
if (!sec_key_valid(sec_key) || name == NULL) {
return false;
}
return strcmp(sec_key + UUID_STR_SIZE, name) == 0;
}
bool sec_key_match_uuid(const char *sec_key,
uuid_t uuid)
{
errno_t ret;
uuid_t key_uuid;
/* Clear uuid value to avoid cppcheck warning. */
uuid_clear(key_uuid);
ret = sec_key_get_uuid(sec_key, key_uuid);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE, "Cannot convert key to UUID\n");
return false;
}
return uuid_compare(key_uuid, uuid) == 0;
}
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