mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
43696d2752
(This used to be commit 7280c1e941
)
283 lines
7.4 KiB
C
283 lines
7.4 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
|
|
PAC Glue between Samba and the KDC
|
|
|
|
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
|
|
|
|
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 "includes.h"
|
|
#include "kdc/kdc.h"
|
|
#include "dsdb/common/flags.h"
|
|
#include "lib/ldb/include/ldb.h"
|
|
#include "librpc/gen_ndr/ndr_krb5pac.h"
|
|
#include "librpc/gen_ndr/krb5pac.h"
|
|
#include "auth/auth.h"
|
|
#include "auth/auth_sam.h"
|
|
#include "param/param.h"
|
|
|
|
struct krb5_dh_moduli;
|
|
struct _krb5_krb_auth_data;
|
|
|
|
krb5_error_code samba_kdc_plugin_init(krb5_context context, void **ptr)
|
|
{
|
|
*ptr = NULL;
|
|
return 0;
|
|
}
|
|
|
|
void samba_kdc_plugin_fini(void *ptr)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static krb5_error_code make_pac(krb5_context context,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct auth_serversupplied_info *server_info,
|
|
krb5_pac *pac)
|
|
{
|
|
struct PAC_LOGON_INFO_CTR logon_info;
|
|
struct netr_SamInfo3 *info3;
|
|
krb5_data pac_data;
|
|
NTSTATUS nt_status;
|
|
enum ndr_err_code ndr_err;
|
|
DATA_BLOB pac_out;
|
|
krb5_error_code ret;
|
|
|
|
ZERO_STRUCT(logon_info);
|
|
|
|
nt_status = auth_convert_server_info_saminfo3(mem_ctx, server_info, &info3);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(1, ("Getting Samba info failed: %s\n", nt_errstr(nt_status)));
|
|
return EINVAL;
|
|
}
|
|
|
|
logon_info.info = talloc_zero(mem_ctx, struct PAC_LOGON_INFO);
|
|
if (!mem_ctx) {
|
|
return ENOMEM;
|
|
}
|
|
|
|
logon_info.info->info3 = *info3;
|
|
|
|
ndr_err = ndr_push_struct_blob(&pac_out, mem_ctx, &logon_info,
|
|
(ndr_push_flags_fn_t)ndr_push_PAC_LOGON_INFO_CTR);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
nt_status = ndr_map_error2ntstatus(ndr_err);
|
|
DEBUG(1, ("PAC (presig) push failed: %s\n", nt_errstr(nt_status)));
|
|
return EINVAL;
|
|
}
|
|
|
|
ret = krb5_data_copy(&pac_data, pac_out.data, pac_out.length);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_pac_init(context, pac);
|
|
if (ret != 0) {
|
|
krb5_data_free(&pac_data);
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_pac_add_buffer(context, *pac, PAC_TYPE_LOGON_INFO, &pac_data);
|
|
krb5_data_free(&pac_data);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Given the right private pointer from hdb_ldb, get a PAC from the attached ldb messages */
|
|
krb5_error_code samba_kdc_get_pac(void *priv,
|
|
krb5_context context,
|
|
struct hdb_entry_ex *client,
|
|
krb5_pac *pac)
|
|
{
|
|
krb5_error_code ret;
|
|
NTSTATUS nt_status;
|
|
struct auth_serversupplied_info *server_info;
|
|
struct hdb_ldb_private *private = talloc_get_type(client->ctx, struct hdb_ldb_private);
|
|
TALLOC_CTX *mem_ctx = talloc_named(private, 0, "samba_get_pac context");
|
|
unsigned int userAccountControl;
|
|
|
|
if (!mem_ctx) {
|
|
return ENOMEM;
|
|
}
|
|
|
|
/* The user account may be set not to want the PAC */
|
|
userAccountControl = ldb_msg_find_attr_as_uint(private->msg, "userAccountControl", 0);
|
|
if (userAccountControl & UF_NO_AUTH_DATA_REQUIRED) {
|
|
*pac = NULL;
|
|
return 0;
|
|
}
|
|
|
|
nt_status = authsam_make_server_info(mem_ctx, private->samdb,
|
|
lp_netbios_name(global_loadparm),
|
|
private->msg,
|
|
private->realm_ref_msg,
|
|
data_blob(NULL, 0),
|
|
data_blob(NULL, 0),
|
|
&server_info);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(0, ("Getting user info for PAC failed: %s\n",
|
|
nt_errstr(nt_status)));
|
|
return ENOMEM;
|
|
}
|
|
|
|
ret = make_pac(context, mem_ctx, server_info, pac);
|
|
|
|
talloc_free(mem_ctx);
|
|
return ret;
|
|
}
|
|
|
|
/* Resign (and reform, including possibly new groups) a PAC */
|
|
|
|
krb5_error_code samba_kdc_reget_pac(void *priv, krb5_context context,
|
|
const krb5_principal client_principal,
|
|
struct hdb_entry_ex *client,
|
|
struct hdb_entry_ex *server, krb5_pac *pac)
|
|
{
|
|
NTSTATUS nt_status;
|
|
enum ndr_err_code ndr_err;
|
|
krb5_error_code ret;
|
|
|
|
unsigned int userAccountControl;
|
|
|
|
struct hdb_ldb_private *private = talloc_get_type(server->ctx, struct hdb_ldb_private);
|
|
krb5_data k5pac_in;
|
|
DATA_BLOB pac_in;
|
|
|
|
struct PAC_LOGON_INFO_CTR logon_info;
|
|
union netr_Validation validation;
|
|
struct auth_serversupplied_info *server_info_out;
|
|
|
|
TALLOC_CTX *mem_ctx = talloc_named(private, 0, "samba_get_pac context");
|
|
|
|
if (!mem_ctx) {
|
|
return ENOMEM;
|
|
}
|
|
|
|
/* The service account may be set not to want the PAC */
|
|
userAccountControl = ldb_msg_find_attr_as_uint(private->msg, "userAccountControl", 0);
|
|
if (userAccountControl & UF_NO_AUTH_DATA_REQUIRED) {
|
|
*pac = NULL;
|
|
return 0;
|
|
}
|
|
|
|
ret = krb5_pac_get_buffer(context, *pac, PAC_TYPE_LOGON_INFO, &k5pac_in);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
pac_in = data_blob_talloc(mem_ctx, k5pac_in.data, k5pac_in.length);
|
|
krb5_data_free(&k5pac_in);
|
|
if (!pac_in.data) {
|
|
talloc_free(mem_ctx);
|
|
return ENOMEM;
|
|
}
|
|
|
|
ndr_err = ndr_pull_struct_blob(&pac_in, mem_ctx, &logon_info,
|
|
(ndr_pull_flags_fn_t)ndr_pull_PAC_LOGON_INFO_CTR);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err) || !logon_info.info) {
|
|
nt_status = ndr_map_error2ntstatus(ndr_err);
|
|
DEBUG(0,("can't parse the PAC LOGON_INFO: %s\n", nt_errstr(nt_status)));
|
|
talloc_free(mem_ctx);
|
|
return EINVAL;
|
|
}
|
|
|
|
/* Pull this right into the normal auth sysstem structures */
|
|
validation.sam3 = &logon_info.info->info3;
|
|
nt_status = make_server_info_netlogon_validation(mem_ctx,
|
|
"",
|
|
3, &validation,
|
|
&server_info_out);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
talloc_free(mem_ctx);
|
|
return ENOMEM;
|
|
}
|
|
|
|
/* We will compleatly regenerate this pac */
|
|
krb5_pac_free(context, *pac);
|
|
|
|
ret = make_pac(context, mem_ctx, server_info_out, pac);
|
|
|
|
talloc_free(mem_ctx);
|
|
return ret;
|
|
}
|
|
|
|
/* Given an hdb entry (and in particular it's private member), consult
|
|
* the account_ok routine in auth/auth_sam.c for consistancy */
|
|
|
|
|
|
krb5_error_code samba_kdc_check_client_access(void *priv,
|
|
krb5_context context, hdb_entry_ex *entry_ex,
|
|
KDC_REQ *req)
|
|
{
|
|
krb5_error_code ret;
|
|
NTSTATUS nt_status;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(entry_ex->ctx);
|
|
struct hdb_ldb_private *private = talloc_get_type(entry_ex->ctx, struct hdb_ldb_private);
|
|
char *name, *workstation = NULL;
|
|
HostAddresses *addresses = req->req_body.addresses;
|
|
int i;
|
|
|
|
if (!tmp_ctx) {
|
|
return ENOMEM;
|
|
}
|
|
|
|
ret = krb5_unparse_name(context, entry_ex->entry.principal, &name);
|
|
if (ret != 0) {
|
|
talloc_free(tmp_ctx);
|
|
return ret;
|
|
}
|
|
|
|
if (addresses) {
|
|
for (i=0; i < addresses->len; i++) {
|
|
if (addresses->val->addr_type == KRB5_ADDRESS_NETBIOS) {
|
|
workstation = talloc_strndup(tmp_ctx, addresses->val->address.data, MIN(addresses->val->address.length, 15));
|
|
if (workstation) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Strip space padding */
|
|
if (workstation) {
|
|
i = MIN(strlen(workstation), 15);
|
|
for (; i > 0 && workstation[i - 1] == ' '; i--) {
|
|
workstation[i - 1] = '\0';
|
|
}
|
|
}
|
|
|
|
nt_status = authsam_account_ok(tmp_ctx,
|
|
private->samdb,
|
|
MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
|
|
private->msg,
|
|
private->realm_ref_msg,
|
|
workstation,
|
|
name);
|
|
free(name);
|
|
|
|
/* TODO: Need a more complete mapping of NTSTATUS to krb5kdc errors */
|
|
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
return KRB5KDC_ERR_POLICY;
|
|
}
|
|
return 0;
|
|
}
|
|
|