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/*
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2022 Red Hat
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 <errno.h>
#include <talloc.h>
#include "config.h"
#include "util/util.h"
static errno_t check_check_pac_opt(const char *inp, uint32_t *check_pac_flags)
{
int ret;
size_t c;
char **list = NULL;
uint32_t flags = 0;
if (strcasecmp(inp, CHECK_PAC_NO_CHECK_STR) == 0) {
flags = 0;
ret = EOK;
goto done;
}
ret = split_on_separator(NULL, inp, ',', true, true, &list, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "Failed to split pac_check value.\n");
goto done;
}
for (c = 0; list[c] != NULL; c++) {
if (strcasecmp(list[c], CHECK_PAC_NO_CHECK_STR) == 0) {
DEBUG(SSSDBG_CONF_SETTINGS,
"pac_check option [%s] can be only used alone.\n",
CHECK_PAC_NO_CHECK_STR);
ret = EINVAL;
goto done;
} else if (strcasecmp(list[c], CHECK_PAC_PRESENT_STR) == 0) {
flags |= CHECK_PAC_PRESENT;
} else if (strcasecmp(list[c], CHECK_PAC_CHECK_UPN_STR) == 0) {
flags |= CHECK_PAC_CHECK_UPN;
} else if (strcasecmp(list[c], CHECK_PAC_UPN_DNS_INFO_PRESENT_STR) == 0) {
flags |= CHECK_PAC_UPN_DNS_INFO_PRESENT;
flags |= CHECK_PAC_CHECK_UPN;
} else if (strcasecmp(list[c], CHECK_PAC_CHECK_UPN_DNS_INFO_EX_STR) == 0) {
flags |= CHECK_PAC_CHECK_UPN_DNS_INFO_EX;
} else if (strcasecmp(list[c], CHECK_PAC_UPN_DNS_INFO_EX_PRESENT_STR) == 0) {
flags |= CHECK_PAC_UPN_DNS_INFO_EX_PRESENT;
flags |= CHECK_PAC_CHECK_UPN_DNS_INFO_EX;
flags |= CHECK_PAC_UPN_DNS_INFO_PRESENT;
flags |= CHECK_PAC_CHECK_UPN;
} else if (strcasecmp(list[c], CHECK_PAC_CHECK_UPN_ALLOW_MISSING_STR) == 0) {
flags |= CHECK_PAC_CHECK_UPN_ALLOW_MISSING;
} else {
DEBUG(SSSDBG_OP_FAILURE, "Unknown value [%s] for pac_check.\n",
list[c]);
ret = EINVAL;
goto done;
}
}
if ((flags & CHECK_PAC_CHECK_UPN_ALLOW_MISSING)
&& !(flags & CHECK_PAC_CHECK_UPN)) {
DEBUG(SSSDBG_CONF_SETTINGS,
"pac_check option '%s' is set but '%s' is not set, this means "
"the UPN is not checked.\n",
CHECK_PAC_CHECK_UPN_ALLOW_MISSING_STR, CHECK_PAC_CHECK_UPN_STR);
}
ret = EOK;
done:
talloc_free(list);
#ifndef HAVE_PAC_RESPONDER
if (ret == EOK && flags != 0) {
DEBUG(SSSDBG_IMPORTANT_INFO,
"pac_check is configured but SSSD is build without PAC "
"responder, not all checks will be available.\n");
}
#endif
if (ret == EOK && check_pac_flags != NULL) {
*check_pac_flags = flags;
}
return ret;
}
errno_t get_pac_check_config(struct confdb_ctx *cdb, uint32_t *pac_check_opts)
{
int ret;
char *dummy;
struct sss_domain_info *dom;
struct sss_domain_info *domains = NULL;
ret = confdb_get_string(cdb, NULL, CONFDB_PAC_CONF_ENTRY,
CONFDB_PAC_CHECK, NULL, &dummy);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to get pac_check config option [%d][%s].\n",
ret, sss_strerror(ret));
return ret;
}
if (dummy == NULL) {
ret = confdb_get_domains(cdb, &domains);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "Failed to get domain list, cannot "
"determine pac_check defaults.\n");
return ret;
}
for (dom = domains; dom != NULL;
dom = get_next_domain(dom, SSS_GND_DESCEND
|SSS_GND_INCLUDE_DISABLED)) {
if (strcasecmp(dom->provider, "ad") == 0
|| strcasecmp(dom->provider, "ipa") == 0) {
break;
}
}
if (dom == NULL) {
/* No AD or IPA provider found */
dummy = talloc_strdup(NULL, CONFDB_PAC_CHECK_DEFAULT);
} else {
dummy = talloc_strdup(NULL, CONFDB_PAC_CHECK_IPA_AD_DEFAULT);
}
if (dummy == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Failed to copy pac_check defaults.\n");
return ENOMEM;
}
}
ret = check_check_pac_opt(dummy, pac_check_opts);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "pac_check option [%s] is invalid.\n",
dummy);
}
talloc_free(dummy);
return ret;
}
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