s3:libsmb: s/struct event_context/struct tevent_context
[Samba/gebeck_regimport.git] / source3 / libsmb / passchange.c
blob393383336bf2bae460fd9ad8e4c78bbde4179b3c
1 /*
2 Unix SMB/CIFS implementation.
3 SMB client password change routine
4 Copyright (C) Andrew Tridgell 1994-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "includes.h"
21 #include "../librpc/gen_ndr/ndr_samr.h"
22 #include "rpc_client/cli_pipe.h"
23 #include "rpc_client/cli_samr.h"
24 #include "libsmb/libsmb.h"
25 #include "libsmb/clirap.h"
26 #include "libsmb/nmblib.h"
27 #include "../libcli/smb/smbXcli_base.h"
29 /*************************************************************
30 Change a password on a remote machine using IPC calls.
31 *************************************************************/
33 NTSTATUS remote_password_change(const char *remote_machine, const char *user_name,
34 const char *old_passwd, const char *new_passwd,
35 char **err_str)
37 struct cli_state *cli = NULL;
38 struct rpc_pipe_client *pipe_hnd = NULL;
39 char *user, *domain, *p;
41 NTSTATUS result;
42 bool pass_must_change = False;
44 user = talloc_strdup(talloc_tos(), user_name);
45 SMB_ASSERT(user != NULL);
46 domain = talloc_strdup(talloc_tos(), "");
47 SMB_ASSERT(domain != NULL);
49 /* allow usernames of the form domain\\user or domain/user */
50 if ((p = strchr_m(user,'\\')) || (p = strchr_m(user,'/')) ||
51 (p = strchr_m(user,*lp_winbind_separator()))) {
52 *p = 0;
53 domain = user;
54 user = p+1;
57 *err_str = NULL;
59 result = cli_connect_nb(remote_machine, NULL, 0, 0x20, NULL,
60 SMB_SIGNING_DEFAULT, 0, &cli);
61 if (!NT_STATUS_IS_OK(result)) {
62 if (asprintf(err_str, "Unable to connect to SMB server on "
63 "machine %s. Error was : %s.\n",
64 remote_machine, nt_errstr(result))==-1) {
65 *err_str = NULL;
67 return result;
70 result = smbXcli_negprot(cli->conn, cli->timeout, PROTOCOL_CORE,
71 PROTOCOL_NT1);
73 if (!NT_STATUS_IS_OK(result)) {
74 if (asprintf(err_str, "machine %s rejected the negotiate "
75 "protocol. Error was : %s.\n",
76 remote_machine, nt_errstr(result)) == -1) {
77 *err_str = NULL;
79 cli_shutdown(cli);
80 return result;
83 /* Given things like SMB signing, restrict anonymous and the like,
84 try an authenticated connection first */
85 result = cli_session_setup(cli, user_name,
86 old_passwd, strlen(old_passwd)+1,
87 old_passwd, strlen(old_passwd)+1, "");
89 if (!NT_STATUS_IS_OK(result)) {
91 /* Password must change or Password expired are the only valid
92 * error conditions here from where we can proceed, the rest like
93 * account locked out or logon failure will lead to errors later
94 * anyway */
96 if (!NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) &&
97 !NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED)) {
98 if (asprintf(err_str, "Could not connect to machine %s: "
99 "%s\n", remote_machine, nt_errstr(result)) == -1) {
100 *err_str = NULL;
102 cli_shutdown(cli);
103 return result;
106 pass_must_change = True;
109 * We should connect as the anonymous user here, in case
110 * the server has "must change password" checked...
111 * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
114 result = cli_session_setup(cli, "", "", 0, "", 0, "");
116 if (!NT_STATUS_IS_OK(result)) {
117 if (asprintf(err_str, "machine %s rejected the session "
118 "setup. Error was : %s.\n",
119 remote_machine, nt_errstr(result)) == -1) {
120 *err_str = NULL;
122 cli_shutdown(cli);
123 return result;
126 result = cli_init_creds(cli, "", "", NULL);
127 if (!NT_STATUS_IS_OK(result)) {
128 cli_shutdown(cli);
129 return result;
131 } else {
132 result = cli_init_creds(cli, user, domain, old_passwd);
133 if (!NT_STATUS_IS_OK(result)) {
134 cli_shutdown(cli);
135 return result;
139 result = cli_tree_connect(cli, "IPC$", "IPC", "", 1);
140 if (!NT_STATUS_IS_OK(result)) {
141 if (asprintf(err_str, "machine %s rejected the tconX on the "
142 "IPC$ share. Error was : %s.\n",
143 remote_machine, nt_errstr(result))) {
144 *err_str = NULL;
146 cli_shutdown(cli);
147 return result;
150 /* Try not to give the password away too easily */
152 if (!pass_must_change) {
153 result = cli_rpc_pipe_open_generic_auth(cli,
154 &ndr_table_samr,
155 NCACN_NP,
156 DCERPC_AUTH_TYPE_NTLMSSP,
157 DCERPC_AUTH_LEVEL_PRIVACY,
158 remote_machine,
159 domain, user,
160 old_passwd,
161 &pipe_hnd);
162 } else {
164 * If the user password must be changed the ntlmssp bind will
165 * fail the same way as the session setup above did. The
166 * difference ist that with a pipe bind we don't get a good
167 * error message, the result will be that the rpc call below
168 * will just fail. So we do it anonymously, there's no other
169 * way.
171 result = cli_rpc_pipe_open_noauth(
172 cli, &ndr_table_samr.syntax_id, &pipe_hnd);
175 if (!NT_STATUS_IS_OK(result)) {
176 if (lp_client_lanman_auth()) {
177 /* Use the old RAP method. */
178 if (!cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
179 result = cli_nt_error(cli);
180 if (asprintf(err_str, "machine %s rejected the "
181 "password change: Error was : %s.\n",
182 remote_machine, nt_errstr(result)) == -1) {
183 *err_str = NULL;
185 cli_shutdown(cli);
186 return result;
188 } else {
189 if (asprintf(err_str, "SAMR connection to machine %s "
190 "failed. Error was %s, but LANMAN password "
191 "changes are disabled\n",
192 remote_machine, nt_errstr(result)) == -1) {
193 *err_str = NULL;
195 cli_shutdown(cli);
196 return result;
200 result = rpccli_samr_chgpasswd_user2(pipe_hnd, talloc_tos(),
201 user_name, new_passwd, old_passwd);
202 if (NT_STATUS_IS_OK(result)) {
203 /* Great - it all worked! */
204 cli_shutdown(cli);
205 return NT_STATUS_OK;
207 } else if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
208 || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
209 /* it failed, but for reasons such as wrong password, too short etc ... */
211 if (asprintf(err_str, "machine %s rejected the password change: "
212 "Error was : %s.\n",
213 remote_machine, get_friendly_nt_error_msg(result)) == -1) {
214 *err_str = NULL;
216 cli_shutdown(cli);
217 return result;
220 /* OK, that failed, so try again... */
221 TALLOC_FREE(pipe_hnd);
223 /* Try anonymous NTLMSSP... */
224 result = cli_init_creds(cli, "", "", NULL);
225 if (!NT_STATUS_IS_OK(result)) {
226 cli_shutdown(cli);
227 return result;
230 result = NT_STATUS_UNSUCCESSFUL;
232 /* OK, this is ugly, but... try an anonymous pipe. */
233 result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
234 &pipe_hnd);
236 if ( NT_STATUS_IS_OK(result) &&
237 (NT_STATUS_IS_OK(result = rpccli_samr_chgpasswd_user2(
238 pipe_hnd, talloc_tos(), user_name,
239 new_passwd, old_passwd)))) {
240 /* Great - it all worked! */
241 cli_shutdown(cli);
242 return NT_STATUS_OK;
243 } else {
244 if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
245 || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
246 /* it failed, but again it was due to things like new password too short */
248 if (asprintf(err_str, "machine %s rejected the "
249 "(anonymous) password change: Error was : "
250 "%s.\n", remote_machine,
251 get_friendly_nt_error_msg(result)) == -1) {
252 *err_str = NULL;
254 cli_shutdown(cli);
255 return result;
258 /* We have failed to change the user's password, and we think the server
259 just might not support SAMR password changes, so fall back */
261 if (lp_client_lanman_auth()) {
262 /* Use the old RAP method. */
263 if (cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
264 /* SAMR failed, but the old LanMan protocol worked! */
266 cli_shutdown(cli);
267 return NT_STATUS_OK;
270 result = cli_nt_error(cli);
271 if (asprintf(err_str, "machine %s rejected the password "
272 "change: Error was : %s.\n",
273 remote_machine, nt_errstr(result)) == -1) {
274 *err_str = NULL;
276 cli_shutdown(cli);
277 return result;
278 } else {
279 if (asprintf(err_str, "SAMR connection to machine %s "
280 "failed. Error was %s, but LANMAN password "
281 "changes are disabled\n",
282 nt_errstr(result), remote_machine) == -1) {
283 *err_str = NULL;
285 cli_shutdown(cli);
286 return NT_STATUS_UNSUCCESSFUL;