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/>.
22 /*************************************************************
23 Change a password on a remote machine using IPC calls.
24 *************************************************************/
26 NTSTATUS remote_password_change(const char *remote_machine, const char *user_name,
27 const char *old_passwd, const char *new_passwd,
30 struct nmb_name calling, called;
31 struct cli_state *cli;
32 struct rpc_pipe_client *pipe_hnd;
33 struct sockaddr_storage ss;
36 bool pass_must_change = False;
40 if(!resolve_name( remote_machine, &ss, 0x20)) {
41 if (asprintf(err_str, "Unable to find an IP address for machine "
42 "%s.\n", remote_machine) == -1) {
45 return NT_STATUS_UNSUCCESSFUL;
48 cli = cli_initialise();
50 return NT_STATUS_NO_MEMORY;
53 result = cli_connect(cli, remote_machine, &ss);
54 if (!NT_STATUS_IS_OK(result)) {
55 if (asprintf(err_str, "Unable to connect to SMB server on "
56 "machine %s. Error was : %s.\n",
57 remote_machine, nt_errstr(result))==-1) {
64 make_nmb_name(&calling, global_myname() , 0x0);
65 make_nmb_name(&called , remote_machine, 0x20);
67 if (!cli_session_request(cli, &calling, &called)) {
68 if (asprintf(err_str, "machine %s rejected the session setup. "
70 remote_machine, cli_errstr(cli)) == -1) {
73 result = cli_nt_error(cli);
78 cli->protocol = PROTOCOL_NT1;
80 result = cli_negprot(cli);
82 if (!NT_STATUS_IS_OK(result)) {
83 if (asprintf(err_str, "machine %s rejected the negotiate "
84 "protocol. Error was : %s.\n",
85 remote_machine, nt_errstr(result)) == -1) {
88 result = cli_nt_error(cli);
93 /* Given things like SMB signing, restrict anonymous and the like,
94 try an authenticated connection first */
95 result = cli_session_setup(cli, user_name,
96 old_passwd, strlen(old_passwd)+1,
97 old_passwd, strlen(old_passwd)+1, "");
99 if (!NT_STATUS_IS_OK(result)) {
101 /* Password must change or Password expired are the only valid
102 * error conditions here from where we can proceed, the rest like
103 * account locked out or logon failure will lead to errors later
106 if (!NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) &&
107 !NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED)) {
108 if (asprintf(err_str, "Could not connect to machine %s: "
109 "%s\n", remote_machine, cli_errstr(cli)) == -1) {
116 pass_must_change = True;
119 * We should connect as the anonymous user here, in case
120 * the server has "must change password" checked...
121 * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
124 result = cli_session_setup(cli, "", "", 0, "", 0, "");
126 if (!NT_STATUS_IS_OK(result)) {
127 if (asprintf(err_str, "machine %s rejected the session "
128 "setup. Error was : %s.\n",
129 remote_machine, cli_errstr(cli)) == -1) {
136 cli_init_creds(cli, "", "", NULL);
138 cli_init_creds(cli, user_name, "", old_passwd);
141 result = cli_tcon_andx(cli, "IPC$", "IPC", "", 1);
142 if (!NT_STATUS_IS_OK(result)) {
143 if (asprintf(err_str, "machine %s rejected the tconX on the "
144 "IPC$ share. Error was : %s.\n",
145 remote_machine, nt_errstr(result))) {
152 /* Try not to give the password away too easily */
154 if (!pass_must_change) {
155 result = cli_rpc_pipe_open_ntlmssp(cli,
156 &ndr_table_samr.syntax_id,
157 PIPE_AUTH_LEVEL_PRIVACY,
158 "", /* what domain... ? */
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
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 if (asprintf(err_str, "machine %s rejected the "
180 "password change: Error was : %s.\n",
181 remote_machine, cli_errstr(cli)) == -1) {
184 result = cli_nt_error(cli);
189 if (asprintf(err_str, "SAMR connection to machine %s "
190 "failed. Error was %s, but LANMAN password "
191 "changed are disabled\n",
192 nt_errstr(result), remote_machine) == -1) {
195 result = cli_nt_error(cli);
201 result = rpccli_samr_chgpasswd_user2(pipe_hnd, talloc_tos(),
202 user_name, new_passwd, old_passwd);
203 if (NT_STATUS_IS_OK(result)) {
204 /* Great - it all worked! */
208 } else if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
209 || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
210 /* it failed, but for reasons such as wrong password, too short etc ... */
212 if (asprintf(err_str, "machine %s rejected the password change: "
214 remote_machine, get_friendly_nt_error_msg(result)) == -1) {
221 /* OK, that failed, so try again... */
222 TALLOC_FREE(pipe_hnd);
224 /* Try anonymous NTLMSSP... */
225 cli_init_creds(cli, "", "", NULL);
227 result = NT_STATUS_UNSUCCESSFUL;
229 /* OK, this is ugly, but... try an anonymous pipe. */
230 result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
233 if ( NT_STATUS_IS_OK(result) &&
234 (NT_STATUS_IS_OK(result = rpccli_samr_chgpasswd_user2(
235 pipe_hnd, talloc_tos(), user_name,
236 new_passwd, old_passwd)))) {
237 /* Great - it all worked! */
241 if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
242 || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
243 /* it failed, but again it was due to things like new password too short */
245 if (asprintf(err_str, "machine %s rejected the "
246 "(anonymous) password change: Error was : "
247 "%s.\n", remote_machine,
248 get_friendly_nt_error_msg(result)) == -1) {
255 /* We have failed to change the user's password, and we think the server
256 just might not support SAMR password changes, so fall back */
258 if (lp_client_lanman_auth()) {
259 /* Use the old RAP method. */
260 if (cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
261 /* SAMR failed, but the old LanMan protocol worked! */
266 if (asprintf(err_str, "machine %s rejected the password "
267 "change: Error was : %s.\n",
268 remote_machine, cli_errstr(cli)) == -1) {
271 result = cli_nt_error(cli);
275 if (asprintf(err_str, "SAMR connection to machine %s "
276 "failed. Error was %s, but LANMAN password "
277 "changed are disabled\n",
278 nt_errstr(result), remote_machine) == -1) {
282 return NT_STATUS_UNSUCCESSFUL;