Unix SMB/CIFS implementation.
SMB client password change routine
Copyright (C) Andrew Tridgell 1994-1998
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-
-
-extern pstring global_myname;
+#include "../librpc/gen_ndr/ndr_samr.h"
+#include "rpc_client/cli_pipe.h"
+#include "rpc_client/cli_samr.h"
+#include "libsmb/libsmb.h"
+#include "libsmb/clirap.h"
+#include "libsmb/nmblib.h"
/*************************************************************
-change a password on a remote machine using IPC calls
+ Change a password on a remote machine using IPC calls.
*************************************************************/
-BOOL remote_password_change(const char *remote_machine, const char *user_name,
- const char *old_passwd, const char *new_passwd,
- char *err_str, size_t err_str_len)
+
+NTSTATUS remote_password_change(const char *remote_machine, const char *user_name,
+ const char *old_passwd, const char *new_passwd,
+ char **err_str)
{
- struct nmb_name calling, called;
- struct cli_state cli;
- struct in_addr ip;
+ struct cli_state *cli = NULL;
+ struct rpc_pipe_client *pipe_hnd = NULL;
+ char *user, *domain, *p;
+
+ NTSTATUS result;
+ bool pass_must_change = False;
+
+ user = talloc_strdup(talloc_tos(), user_name);
+ SMB_ASSERT(user != NULL);
+ domain = talloc_strdup(talloc_tos(), "");
+ SMB_ASSERT(domain != NULL);
+
+ /* allow usernames of the form domain\\user or domain/user */
+ if ((p = strchr_m(user,'\\')) || (p = strchr_m(user,'/')) ||
+ (p = strchr_m(user,*lp_winbind_separator()))) {
+ *p = 0;
+ domain = user;
+ user = p+1;
+ }
+
+ *err_str = NULL;
+
+ result = cli_connect_nb(remote_machine, NULL, 0, 0x20, NULL,
+ SMB_SIGNING_DEFAULT, 0, &cli);
+ if (!NT_STATUS_IS_OK(result)) {
+ if (asprintf(err_str, "Unable to connect to SMB server on "
+ "machine %s. Error was : %s.\n",
+ remote_machine, nt_errstr(result))==-1) {
+ *err_str = NULL;
+ }
+ return result;
+ }
+
+ result = cli_negprot(cli, PROTOCOL_NT1);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ if (asprintf(err_str, "machine %s rejected the negotiate "
+ "protocol. Error was : %s.\n",
+ remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
+
+ /* Given things like SMB signing, restrict anonymous and the like,
+ try an authenticated connection first */
+ result = cli_session_setup(cli, user_name,
+ old_passwd, strlen(old_passwd)+1,
+ old_passwd, strlen(old_passwd)+1, "");
+
+ if (!NT_STATUS_IS_OK(result)) {
+
+ /* Password must change or Password expired are the only valid
+ * error conditions here from where we can proceed, the rest like
+ * account locked out or logon failure will lead to errors later
+ * anyway */
+
+ if (!NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) &&
+ !NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED)) {
+ if (asprintf(err_str, "Could not connect to machine %s: "
+ "%s\n", remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
- *err_str = '\0';
+ pass_must_change = True;
- if(!resolve_name( remote_machine, &ip, 0x20)) {
- slprintf(err_str, err_str_len-1, "unable to find an IP address for machine %s.\n",
- remote_machine );
- return False;
+ /*
+ * We should connect as the anonymous user here, in case
+ * the server has "must change password" checked...
+ * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
+ */
+
+ result = cli_session_setup(cli, "", "", 0, "", 0, "");
+
+ if (!NT_STATUS_IS_OK(result)) {
+ if (asprintf(err_str, "machine %s rejected the session "
+ "setup. Error was : %s.\n",
+ remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
+
+ result = cli_init_creds(cli, "", "", NULL);
+ if (!NT_STATUS_IS_OK(result)) {
+ cli_shutdown(cli);
+ return result;
+ }
+ } else {
+ result = cli_init_creds(cli, user, domain, old_passwd);
+ if (!NT_STATUS_IS_OK(result)) {
+ cli_shutdown(cli);
+ return result;
+ }
+ }
+
+ result = cli_tcon_andx(cli, "IPC$", "IPC", "", 1);
+ if (!NT_STATUS_IS_OK(result)) {
+ if (asprintf(err_str, "machine %s rejected the tconX on the "
+ "IPC$ share. Error was : %s.\n",
+ remote_machine, nt_errstr(result))) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
}
-
- ZERO_STRUCT(cli);
-
- if (!cli_initialise(&cli) || !cli_connect(&cli, remote_machine, &ip)) {
- slprintf(err_str, err_str_len-1, "unable to connect to SMB server on machine %s. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- return False;
+
+ /* Try not to give the password away too easily */
+
+ if (!pass_must_change) {
+ result = cli_rpc_pipe_open_ntlmssp(cli,
+ &ndr_table_samr.syntax_id,
+ NCACN_NP,
+ DCERPC_AUTH_LEVEL_PRIVACY,
+ domain, user,
+ old_passwd,
+ &pipe_hnd);
+ } else {
+ /*
+ * If the user password must be changed the ntlmssp bind will
+ * fail the same way as the session setup above did. The
+ * difference ist that with a pipe bind we don't get a good
+ * error message, the result will be that the rpc call below
+ * will just fail. So we do it anonymously, there's no other
+ * way.
+ */
+ result = cli_rpc_pipe_open_noauth(
+ cli, &ndr_table_samr.syntax_id, &pipe_hnd);
}
-
- make_nmb_name(&calling, global_myname , 0x0);
- make_nmb_name(&called , remote_machine, 0x20);
-
- if (!cli_session_request(&cli, &calling, &called)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the session setup. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+
+ if (!NT_STATUS_IS_OK(result)) {
+ if (lp_client_lanman_auth()) {
+ /* Use the old RAP method. */
+ if (!cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
+ result = cli_nt_error(cli);
+ if (asprintf(err_str, "machine %s rejected the "
+ "password change: Error was : %s.\n",
+ remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
+ } else {
+ if (asprintf(err_str, "SAMR connection to machine %s "
+ "failed. Error was %s, but LANMAN password "
+ "changes are disabled\n",
+ remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
}
-
- cli.protocol = PROTOCOL_NT1;
-
- if (!cli_negprot(&cli)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the negotiate protocol. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+
+ result = rpccli_samr_chgpasswd_user2(pipe_hnd, talloc_tos(),
+ user_name, new_passwd, old_passwd);
+ if (NT_STATUS_IS_OK(result)) {
+ /* Great - it all worked! */
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+
+ } else if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
+ || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
+ /* it failed, but for reasons such as wrong password, too short etc ... */
+
+ if (asprintf(err_str, "machine %s rejected the password change: "
+ "Error was : %s.\n",
+ remote_machine, get_friendly_nt_error_msg(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
}
-
- /*
- * We should connect as the anonymous user here, in case
- * the server has "must change password" checked...
- * Thanks to <Nicholas.S.Jenkins@cdc.com> for this fix.
- */
-
- if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the session setup. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
- }
-
- if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the tconX on the IPC$ share. Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+
+ /* OK, that failed, so try again... */
+ TALLOC_FREE(pipe_hnd);
+
+ /* Try anonymous NTLMSSP... */
+ result = cli_init_creds(cli, "", "", NULL);
+ if (!NT_STATUS_IS_OK(result)) {
+ cli_shutdown(cli);
+ return result;
}
- if(!cli_oem_change_password(&cli, user_name, new_passwd, old_passwd)) {
- slprintf(err_str, err_str_len-1, "machine %s rejected the password change: Error was : %s.\n",
- remote_machine, cli_errstr(&cli) );
- cli_shutdown(&cli);
- return False;
+ result = NT_STATUS_UNSUCCESSFUL;
+
+ /* OK, this is ugly, but... try an anonymous pipe. */
+ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
+ &pipe_hnd);
+
+ if ( NT_STATUS_IS_OK(result) &&
+ (NT_STATUS_IS_OK(result = rpccli_samr_chgpasswd_user2(
+ pipe_hnd, talloc_tos(), user_name,
+ new_passwd, old_passwd)))) {
+ /* Great - it all worked! */
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+ } else {
+ if (!(NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)
+ || NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL))) {
+ /* it failed, but again it was due to things like new password too short */
+
+ if (asprintf(err_str, "machine %s rejected the "
+ "(anonymous) password change: Error was : "
+ "%s.\n", remote_machine,
+ get_friendly_nt_error_msg(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ }
+
+ /* We have failed to change the user's password, and we think the server
+ just might not support SAMR password changes, so fall back */
+
+ if (lp_client_lanman_auth()) {
+ /* Use the old RAP method. */
+ if (cli_oem_change_password(cli, user_name, new_passwd, old_passwd)) {
+ /* SAMR failed, but the old LanMan protocol worked! */
+
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+ }
+
+ result = cli_nt_error(cli);
+ if (asprintf(err_str, "machine %s rejected the password "
+ "change: Error was : %s.\n",
+ remote_machine, nt_errstr(result)) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return result;
+ } else {
+ if (asprintf(err_str, "SAMR connection to machine %s "
+ "failed. Error was %s, but LANMAN password "
+ "changes are disabled\n",
+ nt_errstr(result), remote_machine) == -1) {
+ *err_str = NULL;
+ }
+ cli_shutdown(cli);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
}
-
- cli_shutdown(&cli);
- return True;
}
git.samba.org / gd / samba-autobuild / .git / blobdiff