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/*
Unix SMB/CIFS implementation.
Samba Active Directory authentication policy functions
Copyright (C) Catalyst.Net Ltd 2023
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 "lib/replace/replace.h"
#include "source4/kdc/authn_policy.h"
#include "source4/kdc/authn_policy_impl.h"
bool authn_policy_is_enforced(const struct authn_policy *policy)
{
return policy->enforced;
}
/* Authentication policies for Kerberos clients. */
/* Get the TGT lifetime enforced by an authentication policy. */
int64_t authn_policy_enforced_tgt_lifetime(const struct authn_kerberos_client_policy *policy)
{
if (policy == NULL) {
return 0;
}
if (!authn_policy_is_enforced(&policy->policy)) {
return 0;
}
return policy->tgt_lifetime;
}
/* Authentication policies for NTLM clients. */
/* Return whether an authentication policy enforces device restrictions. */
static bool authn_policy_ntlm_device_restrictions_present(const struct authn_ntlm_client_policy *policy)
{
if (policy == NULL) {
return false;
}
return policy->allowed_to_authenticate_from.data != NULL;
}
/* Check whether the client is allowed to authenticate using NTLM. */
NTSTATUS authn_policy_ntlm_apply_device_restriction(const char *client_account_name,
const char *device_account_name,
const struct authn_ntlm_client_policy *client_policy)
{
/*
* If NTLM authentication is disallowed and the policy enforces a device
* restriction, deny the authentication.
*/
if (!authn_policy_ntlm_device_restrictions_present(client_policy)) {
return NT_STATUS_OK;
}
/*
* Although MS-APDS doesn’t state it, AllowedNTLMNetworkAuthentication
* applies to interactive logons too.
*/
if (client_policy->allowed_ntlm_network_auth) {
return NT_STATUS_OK;
}
if (authn_policy_is_enforced(&client_policy->policy)) {
return NT_STATUS_ACCOUNT_RESTRICTION;
} else {
return NT_STATUS_OK;
}
}
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