diff options
author | Joseph Sutton <josephsutton@catalyst.net.nz> | 2023-05-04 10:59:49 +1200 |
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committer | Andrew Bartlett <abartlet@samba.org> | 2023-05-18 01:03:37 +0000 |
commit | f547cf1db865f93f634e561945da9da44c697f29 (patch) | |
tree | 3719c1f72398e66e560f0a896565b451e6fd2685 /source4/kdc/authn_policy.c | |
parent | 633ebe1b3efee4c61e1856cad5be5723010f9bd1 (diff) | |
download | samba-f547cf1db865f93f634e561945da9da44c697f29.tar.gz |
s4:kdc: Add helper functions for authentication policies
These functions are not yet used.
They are arranged into two libraries: ‘authn_policy’, containing the
core functions, and ‘authn_policy_util’, containing utility functions
that can access the database. This separation is so that libraries
depended upon by ‘samdb’ or ‘dsdb-module’ can use the core functions
without introducing a dependency cycle.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'source4/kdc/authn_policy.c')
-rw-r--r-- | source4/kdc/authn_policy.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/source4/kdc/authn_policy.c b/source4/kdc/authn_policy.c new file mode 100644 index 00000000000..93892f58dbc --- /dev/null +++ b/source4/kdc/authn_policy.c @@ -0,0 +1,85 @@ +/* + 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; + } +} |