2 Unix SMB/CIFS implementation.
4 Samba kpasswd implementation
6 Copyright (c) 2005 Andrew Bartlett <abartlet@samba.org>
7 Copyright (c) 2016 Andreas Schneider <asn@samba.org>
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "system/kerberos.h"
25 #include "librpc/gen_ndr/samr.h"
26 #include "dsdb/samdb/samdb.h"
27 #include "auth/auth.h"
28 #include "kdc/kpasswd-helper.h"
30 bool kpasswd_make_error_reply(TALLOC_CTX *mem_ctx,
31 krb5_error_code error_code,
32 const char *error_string,
33 DATA_BLOB *error_data)
39 if (error_code == 0) {
40 DBG_DEBUG("kpasswd reply - %s\n", error_string);
42 DBG_INFO("kpasswd reply - %s\n", error_string);
45 ok = push_utf8_talloc(mem_ctx, &s, error_string, &slen);
51 * The string 's' has two terminating nul-bytes which are also
52 * reflected by 'slen'. Normally Kerberos doesn't expect that strings
53 * are nul-terminated, but Heimdal does!
55 #ifndef SAMBA4_USES_HEIMDAL
62 if (2 + slen < slen) {
66 error_data->length = 2 + slen;
67 error_data->data = talloc_size(mem_ctx, error_data->length);
68 if (error_data->data == NULL) {
73 RSSVAL(error_data->data, 0, error_code);
74 memcpy(error_data->data + 2, s, slen);
81 bool kpasswd_make_pwchange_reply(TALLOC_CTX *mem_ctx,
83 enum samPwdChangeReason reject_reason,
84 struct samr_DomInfo1 *dominfo,
85 DATA_BLOB *error_blob)
87 const char *reject_string = NULL;
89 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
90 return kpasswd_make_error_reply(mem_ctx,
91 KRB5_KPASSWD_ACCESSDENIED,
92 "No such user when changing password",
94 } else if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
95 return kpasswd_make_error_reply(mem_ctx,
96 KRB5_KPASSWD_ACCESSDENIED,
97 "Not permitted to change password",
100 if (dominfo != NULL &&
101 NT_STATUS_EQUAL(status, NT_STATUS_PASSWORD_RESTRICTION)) {
102 switch (reject_reason) {
103 case SAM_PWD_CHANGE_PASSWORD_TOO_SHORT:
105 talloc_asprintf(mem_ctx,
106 "Password too short, password "
107 "must be at least %d characters "
109 dominfo->min_password_length);
110 if (reject_string == NULL) {
111 reject_string = "Password too short";
114 case SAM_PWD_CHANGE_NOT_COMPLEX:
115 reject_string = "Password does not meet complexity "
118 case SAM_PWD_CHANGE_PWD_IN_HISTORY:
120 talloc_asprintf(mem_ctx,
121 "Password is already in password "
122 "history. New password must not "
123 "match any of your %d previous "
125 dominfo->password_history_length);
126 if (reject_string == NULL) {
127 reject_string = "Password is already in password "
132 reject_string = "Password change rejected, password "
133 "changes may not be permitted on this "
134 "account, or the minimum password age "
135 "may not have elapsed.";
139 return kpasswd_make_error_reply(mem_ctx,
140 KRB5_KPASSWD_SOFTERROR,
145 if (!NT_STATUS_IS_OK(status)) {
146 reject_string = talloc_asprintf(mem_ctx,
147 "Failed to set password: %s",
149 if (reject_string == NULL) {
150 reject_string = "Failed to set password";
152 return kpasswd_make_error_reply(mem_ctx,
153 KRB5_KPASSWD_HARDERROR,
158 return kpasswd_make_error_reply(mem_ctx,
159 KRB5_KPASSWD_SUCCESS,
164 NTSTATUS kpasswd_samdb_set_password(TALLOC_CTX *mem_ctx,
165 struct tevent_context *event_ctx,
166 struct loadparm_context *lp_ctx,
167 struct auth_session_info *session_info,
168 bool is_service_principal,
169 const char *target_principal_name,
171 enum samPwdChangeReason *reject_reason,
172 struct samr_DomInfo1 **dominfo)
175 struct ldb_context *samdb;
176 struct ldb_dn *target_dn = NULL;
179 samdb = samdb_connect(mem_ctx,
186 return NT_STATUS_INTERNAL_DB_CORRUPTION;
189 DBG_INFO("%s\\%s (%s) is changing password of %s\n",
190 session_info->info->domain_name,
191 session_info->info->account_name,
192 dom_sid_string(mem_ctx,
193 &session_info->security_token->sids[PRIMARY_USER_SID_INDEX]),
194 target_principal_name);
196 rc = ldb_transaction_start(samdb);
197 if (rc != LDB_SUCCESS) {
198 return NT_STATUS_TRANSACTION_ABORTED;
201 if (is_service_principal) {
202 status = crack_service_principal_name(samdb,
204 target_principal_name,
208 status = crack_user_principal_name(samdb,
210 target_principal_name,
214 if (!NT_STATUS_IS_OK(status)) {
215 ldb_transaction_cancel(samdb);
219 status = samdb_set_password(samdb,
222 NULL, /* domain_dn */
224 NULL, /* ntNewHash */
228 if (NT_STATUS_IS_OK(status)) {
229 rc = ldb_transaction_commit(samdb);
230 if (rc != LDB_SUCCESS) {
231 DBG_WARNING("Failed to commit transaction to "
232 "set password on %s: %s\n",
233 ldb_dn_get_linearized(target_dn),
234 ldb_errstring(samdb));
235 return NT_STATUS_TRANSACTION_ABORTED;
238 ldb_transaction_cancel(samdb);