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 "librpc/gen_ndr/ndr_krb5pac.h"
28 #include "librpc/gen_ndr/krb5pac.h"
29 #include "auth/auth.h"
30 #include "auth/auth_sam.h"
31 #include "auth/auth_sam_reply.h"
33 #include "param/param.h"
36 NTSTATUS samba_get_logon_info_pac_blob(TALLOC_CTX *mem_ctx,
37 struct auth_serversupplied_info *info,
40 struct netr_SamInfo3 *info3;
41 union PAC_INFO pac_info;
42 enum ndr_err_code ndr_err;
45 ZERO_STRUCT(pac_info);
47 nt_status = auth_convert_server_info_saminfo3(mem_ctx, info, &info3);
48 if (!NT_STATUS_IS_OK(nt_status)) {
49 DEBUG(1, ("Getting Samba info failed: %s\n",
50 nt_errstr(nt_status)));
54 pac_info.logon_info.info = talloc_zero(mem_ctx, struct PAC_LOGON_INFO);
56 return NT_STATUS_NO_MEMORY;
59 pac_info.logon_info.info->info3 = *info3;
61 ndr_err = ndr_push_union_blob(pac_data, mem_ctx, &pac_info,
63 (ndr_push_flags_fn_t)ndr_push_PAC_INFO);
64 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
65 nt_status = ndr_map_error2ntstatus(ndr_err);
66 DEBUG(1, ("PAC (presig) push failed: %s\n",
67 nt_errstr(nt_status)));
74 krb5_error_code samba_make_krb5_pac(krb5_context context,
81 /* The user account may be set not to want the PAC */
86 ret = krb5_data_copy(&pac_data, pac_blob->data, pac_blob->length);
91 ret = krb5_pac_init(context, pac);
93 krb5_data_free(&pac_data);
97 ret = krb5_pac_add_buffer(context, *pac, PAC_TYPE_LOGON_INFO, &pac_data);
98 krb5_data_free(&pac_data);
106 bool samba_princ_needs_pac(struct hdb_entry_ex *princ)
109 struct samba_kdc_entry *p = talloc_get_type(princ->ctx, struct samba_kdc_entry);
110 unsigned int userAccountControl;
113 /* The service account may be set not to want the PAC */
114 userAccountControl = ldb_msg_find_attr_as_uint(p->msg, "userAccountControl", 0);
115 if (userAccountControl & UF_NO_AUTH_DATA_REQUIRED) {
122 /* Was the krbtgt an RODC (and we are not) */
123 bool samba_krbtgt_was_untrusted_rodc(struct hdb_entry_ex *princ)
126 struct samba_kdc_entry *p = talloc_get_type(princ->ctx, struct samba_kdc_entry);
127 int rodc_krbtgt_number;
129 /* The service account may be set not to want the PAC */
130 rodc_krbtgt_number = ldb_msg_find_attr_as_int(p->msg, "msDS-SecondaryKrbTgtNumber", -1);
131 if (rodc_krbtgt_number != p->kdc_db_ctx->my_krbtgt_number) {
138 NTSTATUS samba_kdc_get_pac_blob(TALLOC_CTX *mem_ctx,
139 struct hdb_entry_ex *client,
140 DATA_BLOB **_pac_blob)
142 struct samba_kdc_entry *p = talloc_get_type(client->ctx, struct samba_kdc_entry);
143 struct auth_serversupplied_info *server_info;
147 /* The user account may be set not to want the PAC */
148 if ( ! samba_princ_needs_pac(client)) {
153 pac_blob = talloc_zero(mem_ctx, DATA_BLOB);
155 return NT_STATUS_NO_MEMORY;
158 nt_status = authsam_make_server_info(mem_ctx, p->kdc_db_ctx->samdb,
159 lpcfg_netbios_name(p->kdc_db_ctx->lp_ctx),
160 lpcfg_sam_name(p->kdc_db_ctx->lp_ctx),
166 if (!NT_STATUS_IS_OK(nt_status)) {
167 DEBUG(0, ("Getting user info for PAC failed: %s\n",
168 nt_errstr(nt_status)));
172 nt_status = samba_get_logon_info_pac_blob(mem_ctx, server_info, pac_blob);
173 if (!NT_STATUS_IS_OK(nt_status)) {
174 DEBUG(0, ("Building PAC failed: %s\n",
175 nt_errstr(nt_status)));
179 *_pac_blob = pac_blob;
183 NTSTATUS samba_kdc_update_pac_blob(TALLOC_CTX *mem_ctx,
184 krb5_context context,
185 krb5_pac *pac, DATA_BLOB *pac_blob)
187 struct auth_serversupplied_info *server_info;
191 ret = kerberos_pac_to_server_info(mem_ctx, *pac,
192 context, &server_info);
194 return NT_STATUS_UNSUCCESSFUL;
197 nt_status = samba_get_logon_info_pac_blob(mem_ctx,
198 server_info, pac_blob);
203 /* this function allocates 'data' using malloc.
204 * The caller is responsible for freeing it */
205 void samba_kdc_build_edata_reply(NTSTATUS nt_status, DATA_BLOB *e_data)
210 krb5_error_code ret = 0;
215 pa.padata_type = KRB5_PADATA_PW_SALT;
216 pa.padata_value.length = 12;
217 pa.padata_value.data = malloc(pa.padata_value.length);
218 if (!pa.padata_value.data) {
224 SIVAL(pa.padata_value.data, 0, NT_STATUS_V(nt_status));
225 SIVAL(pa.padata_value.data, 4, 0);
226 SIVAL(pa.padata_value.data, 8, 1);
228 ASN1_MALLOC_ENCODE(PA_DATA, buf, len, &pa, &len, ret);
229 free(pa.padata_value.data);
232 e_data->length = len;
237 /* function to map policy errors */
238 krb5_error_code samba_kdc_map_policy_err(NTSTATUS nt_status)
242 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_MUST_CHANGE))
243 ret = KRB5KDC_ERR_KEY_EXPIRED;
244 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_PASSWORD_EXPIRED))
245 ret = KRB5KDC_ERR_KEY_EXPIRED;
246 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_EXPIRED))
247 ret = KRB5KDC_ERR_CLIENT_REVOKED;
248 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_DISABLED))
249 ret = KRB5KDC_ERR_CLIENT_REVOKED;
250 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_LOGON_HOURS))
251 ret = KRB5KDC_ERR_CLIENT_REVOKED;
252 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCOUNT_LOCKED_OUT))
253 ret = KRB5KDC_ERR_CLIENT_REVOKED;
254 else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_WORKSTATION))
255 ret = KRB5KDC_ERR_POLICY;
257 ret = KRB5KDC_ERR_POLICY;
262 /* Given a kdc entry, consult the account_ok routine in auth/auth_sam.c
264 NTSTATUS samba_kdc_check_client_access(struct samba_kdc_entry *kdc_entry,
265 const char *client_name,
266 const char *workstation,
267 bool password_change)
272 tmp_ctx = talloc_named(NULL, 0, "samba_kdc_check_client_access");
274 return NT_STATUS_NO_MEMORY;
277 /* we allow all kinds of trusts here */
278 nt_status = authsam_account_ok(tmp_ctx,
279 kdc_entry->kdc_db_ctx->samdb,
280 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
281 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
282 kdc_entry->realm_dn, kdc_entry->msg,
283 workstation, client_name,
284 true, password_change);
286 talloc_free(tmp_ctx);