2 Unix SMB/CIFS implementation.
4 PAC Glue between Samba and the KDC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
7 Copyright (C) Simo Sorce <idra@samba.org> 2010
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "../libds/common/flags.h"
26 #include "lib/ldb/include/ldb.h"
27 #include "auth/auth.h"
28 #include "auth/auth_sam_reply.h"
29 #include "kdc/kdc-glue.h"
30 #include "param/param.h"
33 NTSTATUS samba_get_logon_info_pac_blob(TALLOC_CTX *mem_ctx,
34 struct auth_serversupplied_info *info,
37 struct netr_SamInfo3 *info3;
38 union PAC_INFO pac_info;
39 enum ndr_err_code ndr_err;
42 ZERO_STRUCT(pac_info);
44 nt_status = auth_convert_server_info_saminfo3(mem_ctx, info, &info3);
45 if (!NT_STATUS_IS_OK(nt_status)) {
46 DEBUG(1, ("Getting Samba info failed: %s\n",
47 nt_errstr(nt_status)));
51 pac_info.logon_info.info = talloc_zero(mem_ctx, struct PAC_LOGON_INFO);
53 return NT_STATUS_NO_MEMORY;
56 pac_info.logon_info.info->info3 = *info3;
58 ndr_err = ndr_push_union_blob(pac_data, mem_ctx, &pac_info,
60 (ndr_push_flags_fn_t)ndr_push_PAC_INFO);
61 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
62 nt_status = ndr_map_error2ntstatus(ndr_err);
63 DEBUG(1, ("PAC (presig) push failed: %s\n",
64 nt_errstr(nt_status)));
71 krb5_error_code samba_make_krb5_pac(krb5_context context,
78 /* The user account may be set not to want the PAC */
83 ret = krb5_data_copy(&pac_data, pac_blob->data, pac_blob->length);
88 ret = krb5_pac_init(context, pac);
90 krb5_data_free(&pac_data);
94 ret = krb5_pac_add_buffer(context, *pac, PAC_TYPE_LOGON_INFO, &pac_data);
95 krb5_data_free(&pac_data);
103 bool samba_princ_needs_pac(struct hdb_entry_ex *princ)
106 struct samba_kdc_entry *p = talloc_get_type(princ->ctx, struct samba_kdc_entry);
107 uint32_t userAccountControl;
110 /* The service account may be set not to want the PAC */
111 userAccountControl = ldb_msg_find_attr_as_uint(p->msg, "userAccountControl", 0);
112 if (userAccountControl & UF_NO_AUTH_DATA_REQUIRED) {
119 /* Was the krbtgt an RODC (and we are not) */
120 bool samba_krbtgt_was_untrusted_rodc(struct hdb_entry_ex *princ)
123 struct samba_kdc_entry *p = talloc_get_type(princ->ctx, struct samba_kdc_entry);
124 int rodc_krbtgt_number;
126 /* Determine if this was printed by an RODC */
127 rodc_krbtgt_number = ldb_msg_find_attr_as_int(p->msg, "msDS-SecondaryKrbTgtNumber", -1);
128 if (rodc_krbtgt_number == -1) {
130 } else if (rodc_krbtgt_number != p->kdc_db_ctx->my_krbtgt_number) {
137 NTSTATUS samba_kdc_get_pac_blob(TALLOC_CTX *mem_ctx,
138 struct hdb_entry_ex *client,
139 DATA_BLOB **_pac_blob)
141 struct samba_kdc_entry *p = talloc_get_type(client->ctx, struct samba_kdc_entry);
142 struct auth_serversupplied_info *server_info;
146 /* The user account may be set not to want the PAC */
147 if ( ! samba_princ_needs_pac(client)) {
152 pac_blob = talloc_zero(mem_ctx, DATA_BLOB);
154 return NT_STATUS_NO_MEMORY;
157 nt_status = authsam_make_server_info(mem_ctx, p->kdc_db_ctx->samdb,
158 lpcfg_netbios_name(p->kdc_db_ctx->lp_ctx),
159 lpcfg_sam_name(p->kdc_db_ctx->lp_ctx),
165 if (!NT_STATUS_IS_OK(nt_status)) {
166 DEBUG(0, ("Getting user info for PAC failed: %s\n",
167 nt_errstr(nt_status)));
171 nt_status = samba_get_logon_info_pac_blob(mem_ctx, server_info, pac_blob);
172 if (!NT_STATUS_IS_OK(nt_status)) {
173 DEBUG(0, ("Building PAC failed: %s\n",
174 nt_errstr(nt_status)));
178 *_pac_blob = pac_blob;
182 NTSTATUS samba_kdc_update_pac_blob(TALLOC_CTX *mem_ctx,
183 krb5_context context,
184 krb5_pac *pac, DATA_BLOB *pac_blob)
186 struct auth_serversupplied_info *server_info;
190 ret = kerberos_pac_to_server_info(mem_ctx, *pac,
191 context, &server_info);
193 return NT_STATUS_UNSUCCESSFUL;
196 nt_status = samba_get_logon_info_pac_blob(mem_ctx,
197 server_info, pac_blob);
202 /* this function allocates 'data' using malloc.
203 * The caller is responsible for freeing it */
204 void samba_kdc_build_edata_reply(NTSTATUS nt_status, DATA_BLOB *e_data)
209 krb5_error_code ret = 0;
214 pa.padata_type = KRB5_PADATA_PW_SALT;
215 pa.padata_value.length = 12;
216 pa.padata_value.data = malloc(pa.padata_value.length);
217 if (!pa.padata_value.data) {
223 SIVAL(pa.padata_value.data, 0, NT_STATUS_V(nt_status));
224 SIVAL(pa.padata_value.data, 4, 0);
225 SIVAL(pa.padata_value.data, 8, 1);
227 ASN1_MALLOC_ENCODE(PA_DATA, buf, len, &pa, &len, ret);
228 free(pa.padata_value.data);
231 e_data->length = len;
236 /* function to map policy errors */
237 krb5_error_code samba_kdc_map_policy_err(NTSTATUS nt_status)
241 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_MUST_CHANGE))
242 ret = KRB5KDC_ERR_KEY_EXPIRED;
243 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_EXPIRED))
244 ret = KRB5KDC_ERR_KEY_EXPIRED;
245 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_EXPIRED))
246 ret = KRB5KDC_ERR_CLIENT_REVOKED;
247 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_DISABLED))
248 ret = KRB5KDC_ERR_CLIENT_REVOKED;
249 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_LOGON_HOURS))
250 ret = KRB5KDC_ERR_CLIENT_REVOKED;
251 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_LOCKED_OUT))
252 ret = KRB5KDC_ERR_CLIENT_REVOKED;
253 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_WORKSTATION))
254 ret = KRB5KDC_ERR_POLICY;
256 ret = KRB5KDC_ERR_POLICY;
261 /* Given a kdc entry, consult the account_ok routine in auth/auth_sam.c
263 NTSTATUS samba_kdc_check_client_access(struct samba_kdc_entry *kdc_entry,
264 const char *client_name,
265 const char *workstation,
266 bool password_change)
271 tmp_ctx = talloc_named(NULL, 0, "samba_kdc_check_client_access");
273 return NT_STATUS_NO_MEMORY;
276 /* we allow all kinds of trusts here */
277 nt_status = authsam_account_ok(tmp_ctx,
278 kdc_entry->kdc_db_ctx->samdb,
279 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
280 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
281 kdc_entry->realm_dn, kdc_entry->msg,
282 workstation, client_name,
283 true, password_change);
285 talloc_free(tmp_ctx);