2 Unix SMB/Netbios implementation.
3 SMB client library implementation
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Richard Sharpe 2000, 2002
6 Copyright (C) John Terpstra 2000
7 Copyright (C) Tom Jansen (Ninja ISD) 2002
8 Copyright (C) Derrell Lipman 2003-2008
9 Copyright (C) Jeremy Allison 2007, 2008
10 Copyright (C) SATOH Fumiyasu <fumiyas@osstech.co.jp> 2009.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "libsmb/libsmb.h"
28 #include "libsmbclient.h"
29 #include "libsmb_internal.h"
30 #include "../librpc/gen_ndr/ndr_lsa.h"
31 #include "rpc_client/cli_pipe.h"
32 #include "rpc_client/cli_lsarpc.h"
33 #include "libcli/security/security.h"
34 #include "libsmb/nmblib.h"
35 #include "../libcli/smb/smbXcli_base.h"
38 * Check a server for being alive and well.
39 * returns 0 if the server is in shape. Returns 1 on error
41 * Also useable outside libsmbclient to enable external cache
42 * to do some checks too.
45 SMBC_check_server(SMBCCTX * context,
50 if (!cli_state_is_connected(server->cli)) {
54 now = time_mono(NULL);
56 if (server->last_echo_time == (time_t)0 ||
57 now > server->last_echo_time +
58 (server->cli->timeout/1000)) {
59 unsigned char data[16] = {0};
60 NTSTATUS status = cli_echo(server->cli,
62 data_blob_const(data, sizeof(data)));
63 if (!NT_STATUS_IS_OK(status)) {
65 * Some NetApp servers return
66 * NT_STATUS_INVALID_PARAMETER.That's OK, they still
68 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13007
70 if (!NT_STATUS_EQUAL(status,
71 NT_STATUS_INVALID_PARAMETER)) {
75 server->last_echo_time = now;
81 * Remove a server from the cached server list it's unused.
82 * On success, 0 is returned. 1 is returned if the server could not be removed.
84 * Also useable outside libsmbclient
87 SMBC_remove_unused_server(SMBCCTX * context,
92 /* are we being fooled ? */
93 if (!context || !context->internal->initialized || !srv) {
97 /* Check all open files/directories for a relation with this server */
98 for (file = context->internal->files; file; file = file->next) {
99 if (file->srv == srv) {
101 DEBUG(3, ("smbc_remove_usused_server: "
102 "%p still used by %p.\n",
108 DLIST_REMOVE(context->internal->servers, srv);
110 cli_shutdown(srv->cli);
113 DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv));
115 smbc_getFunctionRemoveCachedServer(context)(context, srv);
121 /****************************************************************
122 * Call the auth_fn with fixed size (fstring) buffers.
123 ***************************************************************/
125 SMBC_call_auth_fn(TALLOC_CTX *ctx,
133 fstring workgroup = { 0 };
134 fstring username = { 0 };
135 fstring password = { 0 };
136 smbc_get_auth_data_with_context_fn auth_with_context_fn;
138 if (*pp_workgroup != NULL) {
139 strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
141 if (*pp_username != NULL) {
142 strlcpy(username, *pp_username, sizeof(username));
144 if (*pp_password != NULL) {
145 strlcpy(password, *pp_password, sizeof(password));
148 /* See if there's an authentication with context function provided */
149 auth_with_context_fn = smbc_getFunctionAuthDataWithContext(context);
150 if (auth_with_context_fn)
152 (* auth_with_context_fn)(context,
154 workgroup, sizeof(workgroup),
155 username, sizeof(username),
156 password, sizeof(password));
160 smbc_getFunctionAuthData(context)(server, share,
161 workgroup, sizeof(workgroup),
162 username, sizeof(username),
163 password, sizeof(password));
166 TALLOC_FREE(*pp_workgroup);
167 TALLOC_FREE(*pp_username);
168 TALLOC_FREE(*pp_password);
170 *pp_workgroup = talloc_strdup(ctx, workgroup);
171 *pp_username = talloc_strdup(ctx, username);
172 *pp_password = talloc_strdup(ctx, password);
177 SMBC_get_auth_data(const char *server, const char *share,
178 char *workgroup_buf, int workgroup_buf_len,
179 char *username_buf, int username_buf_len,
180 char *password_buf, int password_buf_len)
182 /* Default function just uses provided data. Nothing to do. */
188 SMBC_find_server(TALLOC_CTX *ctx,
199 if (!pp_workgroup || !pp_username || !pp_password) {
205 srv = smbc_getFunctionGetCachedServer(context)(context,
210 if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
211 !*pp_password || !(*pp_password)[0])) {
212 SMBC_call_auth_fn(ctx, context, server, share,
213 pp_workgroup, pp_username, pp_password);
216 * However, smbc_auth_fn may have picked up info relating to
217 * an existing connection, so try for an existing connection
221 goto check_server_cache;
226 if (smbc_getFunctionCheckServer(context)(context, srv)) {
228 * This server is no good anymore
229 * Try to remove it and check for more possible
230 * servers in the cache
232 if (smbc_getFunctionRemoveUnusedServer(context)(context,
235 * We could not remove the server completely,
236 * remove it from the cache so we will not get
237 * it again. It will be removed when the last
238 * file/dir is closed.
240 smbc_getFunctionRemoveCachedServer(context)(context,
245 * Maybe there are more cached connections to this
248 goto check_server_cache;
258 * Connect to a server, possibly on an existing connection
260 * Here, what we want to do is: If the server and username
261 * match an existing connection, reuse that, otherwise, establish a
264 * If we have to create a new connection, call the auth_fn to get the
265 * info we need, unless the username and password were passed in.
269 SMBC_server_internal(TALLOC_CTX *ctx,
271 bool connect_if_not_found,
281 char *workgroup = NULL;
282 struct cli_state *c = NULL;
283 const char *server_n = server;
284 int is_ipc = (share != NULL && strcmp(share, "IPC$") == 0);
285 uint32_t fs_attrs = 0;
286 const char *username_used = NULL;
287 const char *password_used = NULL;
289 char *newserver, *newshare;
291 struct smbXcli_tcon *tcon = NULL;
292 int signing_state = SMB_SIGNING_DEFAULT;
293 struct cli_credentials *creds = NULL;
294 bool use_kerberos = false;
295 bool fallback_after_kerberos = false;
296 bool use_ccache = false;
297 bool pw_nt_hash = false;
302 if (server[0] == 0) {
307 /* Look for a cached connection */
308 srv = SMBC_find_server(ctx, context, server, share,
309 pp_workgroup, pp_username, pp_password);
312 * If we found a connection and we're only allowed one share per
316 share != NULL && *share != '\0' &&
317 smbc_getOptionOneSharePerServer(context)) {
320 * ... then if there's no current connection to the share,
321 * connect to it. SMBC_find_server(), or rather the function
322 * pointed to by context->get_cached_srv_fn which
323 * was called by SMBC_find_server(), will have issued a tree
324 * disconnect if the requested share is not the same as the
325 * one that was already connected.
329 * Use srv->cli->desthost and srv->cli->share instead of
330 * server and share below to connect to the actual share,
331 * i.e., a normal share or a referred share from
332 * 'msdfs proxy' share.
334 if (!cli_state_has_tcon(srv->cli)) {
335 /* Ensure we have accurate auth info */
336 SMBC_call_auth_fn(ctx, context,
337 smbXcli_conn_remote_name(srv->cli->conn),
343 if (!*pp_workgroup || !*pp_username || !*pp_password) {
345 cli_shutdown(srv->cli);
347 smbc_getFunctionRemoveCachedServer(context)(context,
353 * We don't need to renegotiate encryption
354 * here as the encryption context is not per
358 status = cli_tree_connect(srv->cli,
362 if (!NT_STATUS_IS_OK(status)) {
363 cli_shutdown(srv->cli);
364 errno = map_errno_from_nt_status(status);
366 smbc_getFunctionRemoveCachedServer(context)(context,
371 /* Determine if this share supports case sensitivity */
374 ("IPC$ so ignore case sensitivity\n"));
375 status = NT_STATUS_OK;
377 status = cli_get_fs_attr_info(c, &fs_attrs);
380 if (!NT_STATUS_IS_OK(status)) {
381 DEBUG(4, ("Could not retrieve "
382 "case sensitivity flag: %s.\n",
386 * We can't determine the case sensitivity of
387 * the share. We have no choice but to use the
388 * user-specified case sensitivity setting.
390 if (smbc_getOptionCaseSensitive(context)) {
391 cli_set_case_sensitive(c, True);
393 cli_set_case_sensitive(c, False);
395 } else if (!is_ipc) {
397 ("Case sensitive: %s\n",
398 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
401 cli_set_case_sensitive(
403 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
409 * Regenerate the dev value since it's based on both
413 const char *remote_name =
414 smbXcli_conn_remote_name(srv->cli->conn);
416 srv->dev = (dev_t)(str_checksum(remote_name) ^
417 str_checksum(srv->cli->share));
422 /* If we have a connection... */
425 /* ... then we're done here. Give 'em what they came for. */
430 /* If we're not asked to connect when a connection doesn't exist... */
431 if (! connect_if_not_found) {
432 /* ... then we're done here. */
436 if (!*pp_workgroup || !*pp_username || !*pp_password) {
441 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
443 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
445 status = NT_STATUS_UNSUCCESSFUL;
447 if (smbc_getOptionUseKerberos(context)) {
448 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
452 if (smbc_getOptionFallbackAfterKerberos(context)) {
453 flags |= CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS;
454 fallback_after_kerberos = true;
457 if (smbc_getOptionUseCCache(context)) {
458 flags |= CLI_FULL_CONNECTION_USE_CCACHE;
462 if (smbc_getOptionUseNTHash(context)) {
463 flags |= CLI_FULL_CONNECTION_USE_NT_HASH;
467 if (context->internal->smb_encryption_level != SMBC_ENCRYPTLEVEL_NONE) {
468 signing_state = SMB_SIGNING_REQUIRED;
472 if (share == NULL || *share == '\0' || is_ipc) {
474 * Try 139 first for IPC$
476 status = cli_connect_nb(server_n, NULL, NBT_SMB_PORT, 0x20,
477 smbc_getNetbiosName(context),
478 signing_state, flags, &c);
482 if (!NT_STATUS_IS_OK(status)) {
484 * No IPC$ or 139 did not work
486 status = cli_connect_nb(server_n, NULL, port, 0x20,
487 smbc_getNetbiosName(context),
488 signing_state, flags, &c);
491 if (!NT_STATUS_IS_OK(status)) {
492 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
493 DBG_ERR("NetBIOS support disabled, unable to connect");
496 errno = map_errno_from_nt_status(status);
500 cli_set_timeout(c, smbc_getTimeout(context));
502 status = smbXcli_negprot(c->conn, c->timeout,
503 lp_client_min_protocol(),
504 lp_client_max_protocol());
505 if (!NT_STATUS_IS_OK(status)) {
507 errno = map_errno_from_nt_status(status);
511 status = cli_state_update_after_negprot(c);
512 if (!NT_STATUS_IS_OK(status)) {
518 username_used = *pp_username;
519 password_used = *pp_password;
521 creds = cli_session_creds_init(c,
527 fallback_after_kerberos,
536 status = cli_session_setup_creds(c, creds);
537 if (!NT_STATUS_IS_OK(status)) {
539 /* Failed. Try an anonymous login, if allowed by flags. */
543 if (smbc_getOptionNoAutoAnonymousLogin(context) ||
544 !NT_STATUS_IS_OK(cli_session_setup_anon(c))) {
552 DEBUG(4,(" session setup ok\n"));
554 /* here's the fun part....to support 'msdfs proxy' shares
555 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
556 here before trying to connect to the original share.
557 cli_check_msdfs_proxy() will fail if it is a normal share. */
559 if (smbXcli_conn_dfs_supported(c->conn) &&
560 cli_check_msdfs_proxy(ctx, c, share,
561 &newserver, &newshare,
562 /* FIXME: cli_check_msdfs_proxy() does
563 not support smbc_smb_encrypt_level type */
564 context->internal->smb_encryption_level ?
568 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
569 newserver, port, newshare, pp_workgroup,
570 pp_username, pp_password, in_cache);
571 TALLOC_FREE(newserver);
572 TALLOC_FREE(newshare);
576 /* must be a normal share */
578 status = cli_tree_connect_creds(c, share, "?????", creds);
579 if (!NT_STATUS_IS_OK(status)) {
581 errno = map_errno_from_nt_status(status);
585 DEBUG(4,(" tconx ok\n"));
587 if (smbXcli_conn_protocol(c->conn) >= PROTOCOL_SMB2_02) {
593 /* Determine if this share supports case sensitivity */
595 DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
596 status = NT_STATUS_OK;
598 status = cli_get_fs_attr_info(c, &fs_attrs);
601 if (!NT_STATUS_IS_OK(status)) {
602 DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
606 * We can't determine the case sensitivity of the share. We
607 * have no choice but to use the user-specified case
608 * sensitivity setting.
610 if (smbc_getOptionCaseSensitive(context)) {
611 cli_set_case_sensitive(c, True);
613 cli_set_case_sensitive(c, False);
615 } else if (!is_ipc) {
616 DEBUG(4, ("Case sensitive: %s\n",
617 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
620 smbXcli_tcon_set_fs_attributes(tcon, fs_attrs);
623 if (context->internal->smb_encryption_level) {
624 /* Attempt encryption. */
625 status = cli_cm_force_encryption_creds(c,
628 if (!NT_STATUS_IS_OK(status)) {
631 * context->smb_encryption_level == 1
632 * means don't fail if encryption can't be negotiated,
633 * == 2 means fail if encryption can't be negotiated.
636 DEBUG(4,(" SMB encrypt failed\n"));
638 if (context->internal->smb_encryption_level == 2) {
644 DEBUG(4,(" SMB encrypt ok\n"));
648 * Ok, we have got a nice connection
649 * Let's allocate a server structure.
652 srv = SMB_MALLOC_P(SMBCSRV);
660 DLIST_ADD(srv->cli, c);
661 srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
662 srv->no_pathinfo = False;
663 srv->no_pathinfo2 = False;
664 srv->no_pathinfo3 = False;
665 srv->no_nt_session = False;
668 if (!pp_workgroup || !*pp_workgroup || !**pp_workgroup) {
669 workgroup = talloc_strdup(ctx, smbc_getWorkgroup(context));
671 workgroup = *pp_workgroup;
681 /* set the credentials to make DFS work */
682 smbc_set_credentials_with_fallback(context,
691 SMBC_server(TALLOC_CTX *ctx,
693 bool connect_if_not_found,
702 bool in_cache = false;
704 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
705 server, port, share, pp_workgroup,
706 pp_username, pp_password, &in_cache);
715 /* Now add it to the cache (internal or external) */
716 /* Let the cache function set errno if it wants to */
718 if (smbc_getFunctionAddCachedServer(context)(context, srv,
722 int saved_errno = errno;
723 DEBUG(3, (" Failed to add server to cache\n"));
732 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
733 server, share, srv));
735 DLIST_ADD(context->internal->servers, srv);
740 * Connect to a server for getting/setting attributes, possibly on an existing
741 * connection. This works similarly to SMBC_server().
744 SMBC_attr_server(TALLOC_CTX *ctx,
754 struct cli_state *ipc_cli = NULL;
755 struct rpc_pipe_client *pipe_hnd = NULL;
758 SMBCSRV *ipc_srv=NULL;
761 * Use srv->cli->desthost and srv->cli->share instead of
762 * server and share below to connect to the actual share,
763 * i.e., a normal share or a referred share from
764 * 'msdfs proxy' share.
766 srv = SMBC_server(ctx, context, true, server, port, share,
767 pp_workgroup, pp_username, pp_password);
771 server = smbXcli_conn_remote_name(srv->cli->conn);
772 share = srv->cli->share;
775 * See if we've already created this special connection. Reference
776 * our "special" share name '*IPC$', which is an impossible real share
777 * name due to the leading asterisk.
779 ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
780 pp_workgroup, pp_username, pp_password);
782 int signing_state = SMB_SIGNING_DEFAULT;
784 /* We didn't find a cached connection. Get the password */
785 if (!*pp_password || (*pp_password)[0] == '\0') {
786 /* ... then retrieve it now. */
787 SMBC_call_auth_fn(ctx, context, server, share,
791 if (!*pp_workgroup || !*pp_username || !*pp_password) {
798 if (smbc_getOptionUseKerberos(context)) {
799 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
801 if (smbc_getOptionUseCCache(context)) {
802 flags |= CLI_FULL_CONNECTION_USE_CCACHE;
804 if (context->internal->smb_encryption_level != SMBC_ENCRYPTLEVEL_NONE) {
805 signing_state = SMB_SIGNING_REQUIRED;
808 nt_status = cli_full_connection(&ipc_cli,
809 lp_netbios_name(), server,
810 NULL, 0, "IPC$", "?????",
816 if (! NT_STATUS_IS_OK(nt_status)) {
817 DEBUG(1,("cli_full_connection failed! (%s)\n",
818 nt_errstr(nt_status)));
823 if (context->internal->smb_encryption_level) {
824 /* Attempt encryption. */
825 nt_status = cli_cm_force_encryption(ipc_cli,
830 if (!NT_STATUS_IS_OK(nt_status)) {
833 * context->smb_encryption_level ==
834 * 1 means don't fail if encryption can't be
835 * negotiated, == 2 means fail if encryption
836 * can't be negotiated.
839 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
841 if (context->internal->smb_encryption_level == 2) {
842 cli_shutdown(ipc_cli);
847 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
850 ipc_srv = SMB_MALLOC_P(SMBCSRV);
853 cli_shutdown(ipc_cli);
857 ZERO_STRUCTP(ipc_srv);
858 DLIST_ADD(ipc_srv->cli, ipc_cli);
860 nt_status = cli_rpc_pipe_open_noauth(
861 ipc_srv->cli, &ndr_table_lsarpc, &pipe_hnd);
862 if (!NT_STATUS_IS_OK(nt_status)) {
863 DEBUG(1, ("cli_nt_session_open fail!\n"));
865 cli_shutdown(ipc_srv->cli);
871 * Some systems don't support
872 * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
873 * so we might as well do it too.
876 nt_status = rpccli_lsa_open_policy(
880 GENERIC_EXECUTE_ACCESS,
883 if (!NT_STATUS_IS_OK(nt_status)) {
884 errno = SMBC_errno(context, ipc_srv->cli);
885 cli_shutdown(ipc_srv->cli);
890 /* now add it to the cache (internal or external) */
892 errno = 0; /* let cache function set errno if it likes */
893 if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
898 DEBUG(3, (" Failed to add server to cache\n"));
902 cli_shutdown(ipc_srv->cli);
907 DLIST_ADD(context->internal->servers, ipc_srv);