mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
340ab6a256
(This used to be commit 30a180f2fc
)
613 lines
16 KiB
C
613 lines
16 KiB
C
/*
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Unix SMB/CIFS implementation.
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Winbind daemon - sid related functions
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Copyright (C) Tim Potter 2000
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "winbindd.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_WINBIND
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/* Convert a string */
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static void lookupsid_recv(void *private_data, bool success,
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const char *dom_name, const char *name,
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enum lsa_SidType type);
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void winbindd_lookupsid(struct winbindd_cli_state *state)
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{
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DOM_SID sid;
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/* Ensure null termination */
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state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
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DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid,
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state->request.data.sid));
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if (!string_to_sid(&sid, state->request.data.sid)) {
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DEBUG(5, ("%s not a SID\n", state->request.data.sid));
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request_error(state);
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return;
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}
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winbindd_lookupsid_async(state->mem_ctx, &sid, lookupsid_recv, state);
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}
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static void lookupsid_recv(void *private_data, bool success,
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const char *dom_name, const char *name,
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enum lsa_SidType type)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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if (!success) {
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DEBUG(5, ("lookupsid returned an error\n"));
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request_error(state);
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return;
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}
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fstrcpy(state->response.data.name.dom_name, dom_name);
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fstrcpy(state->response.data.name.name, name);
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state->response.data.name.type = type;
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request_ok(state);
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}
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/**
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* Look up the SID for a qualified name.
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**/
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static void lookupname_recv(void *private_data, bool success,
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const DOM_SID *sid, enum lsa_SidType type);
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void winbindd_lookupname(struct winbindd_cli_state *state)
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{
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char *name_domain, *name_user;
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char *p;
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/* Ensure null termination */
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state->request.data.name.dom_name[sizeof(state->request.data.name.dom_name)-1]='\0';
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/* Ensure null termination */
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state->request.data.name.name[sizeof(state->request.data.name.name)-1]='\0';
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/* cope with the name being a fully qualified name */
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p = strstr(state->request.data.name.name, lp_winbind_separator());
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if (p) {
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*p = 0;
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name_domain = state->request.data.name.name;
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name_user = p+1;
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} else {
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name_domain = state->request.data.name.dom_name;
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name_user = state->request.data.name.name;
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}
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DEBUG(3, ("[%5lu]: lookupname %s%s%s\n", (unsigned long)state->pid,
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name_domain, lp_winbind_separator(), name_user));
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winbindd_lookupname_async(state->mem_ctx, name_domain, name_user,
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lookupname_recv, WINBINDD_LOOKUPNAME,
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state);
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}
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static void lookupname_recv(void *private_data, bool success,
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const DOM_SID *sid, enum lsa_SidType type)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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if (!success) {
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DEBUG(5, ("lookupname returned an error\n"));
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request_error(state);
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return;
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}
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sid_to_fstring(state->response.data.sid.sid, sid);
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state->response.data.sid.type = type;
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request_ok(state);
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return;
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}
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void winbindd_lookuprids(struct winbindd_cli_state *state)
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{
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struct winbindd_domain *domain;
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DOM_SID domain_sid;
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/* Ensure null termination */
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state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
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DEBUG(10, ("lookup_rids: %s\n", state->request.data.sid));
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if (!string_to_sid(&domain_sid, state->request.data.sid)) {
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DEBUG(5, ("Could not convert %s to SID\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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domain = find_lookup_domain_from_sid(&domain_sid);
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if (domain == NULL) {
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DEBUG(10, ("Could not find domain for name %s\n",
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state->request.domain_name));
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request_error(state);
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return;
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}
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sendto_domain(state, domain);
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}
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/* Convert a sid to a uid. We assume we only have one rid attached to the
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sid. */
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static void sid2uid_recv(void *private_data, bool success, uid_t uid)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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struct dom_sid sid;
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string_to_sid(&sid, state->request.data.sid);
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if (!success) {
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DEBUG(5, ("Could not convert sid %s\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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state->response.data.uid = uid;
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request_ok(state);
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}
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static void sid2uid_lookupsid_recv( void *private_data, bool success,
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const char *domain_name,
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const char *name,
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enum lsa_SidType type)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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DOM_SID sid;
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if (!string_to_sid(&sid, state->request.data.sid)) {
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DEBUG(1, ("sid2uid_lookupsid_recv: Could not get convert sid "
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"%s from string\n", state->request.data.sid));
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request_error(state);
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return;
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}
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if (!success) {
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DEBUG(5, ("sid2uid_lookupsid_recv Could not convert get sid type for %s\n",
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state->request.data.sid));
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goto fail;
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}
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if ( (type!=SID_NAME_USER) && (type!=SID_NAME_COMPUTER) ) {
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DEBUG(5,("sid2uid_lookupsid_recv: Sid %s is not a user or a computer.\n",
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state->request.data.sid));
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goto fail;
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}
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/* always use the async interface (may block) */
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winbindd_sid2uid_async(state->mem_ctx, &sid, sid2uid_recv, state);
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return;
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fail:
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/*
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* We have to set the cache ourselves here, the child which is
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* normally responsible was not queried yet.
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*/
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idmap_cache_set_sid2uid(&sid, -1);
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request_error(state);
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return;
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}
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void winbindd_sid_to_uid(struct winbindd_cli_state *state)
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{
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DOM_SID sid;
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uid_t uid;
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bool expired;
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/* Ensure null termination */
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state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
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DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
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state->request.data.sid));
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if (!string_to_sid(&sid, state->request.data.sid)) {
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DEBUG(1, ("Could not get convert sid %s from string\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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if (idmap_cache_find_sid2uid(&sid, &uid, &expired)) {
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DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
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(int)uid, expired ? " (expired)": ""));
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if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if (uid == -1) {
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DEBUG(10, ("Returning negative cache entry\n"));
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request_error(state);
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return;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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state->response.data.uid = uid;
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request_ok(state);
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return;
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}
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/* Validate the SID as a user. Hopefully this will hit cache.
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Needed to prevent DoS by exhausting the uid allocation
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range from random SIDs. */
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backend:
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winbindd_lookupsid_async( state->mem_ctx, &sid, sid2uid_lookupsid_recv, state );
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}
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/* Convert a sid to a gid. We assume we only have one rid attached to the
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sid.*/
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static void sid2gid_recv(void *private_data, bool success, gid_t gid)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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struct dom_sid sid;
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string_to_sid(&sid, state->request.data.sid);
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if (!success) {
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DEBUG(5, ("Could not convert sid %s\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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state->response.data.gid = gid;
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request_ok(state);
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}
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static void sid2gid_lookupsid_recv( void *private_data, bool success,
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const char *domain_name,
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const char *name,
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enum lsa_SidType type)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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DOM_SID sid;
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if (!string_to_sid(&sid, state->request.data.sid)) {
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DEBUG(1, ("sid2gid_lookupsid_recv: Could not get convert sid "
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"%s from string\n", state->request.data.sid));
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request_error(state);
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return;
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}
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if (!success) {
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DEBUG(5, ("sid2gid_lookupsid_recv: Could not get sid type for %s\n",
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state->request.data.sid));
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goto fail;
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}
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if ( (type!=SID_NAME_DOM_GRP) &&
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(type!=SID_NAME_ALIAS) &&
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(type!=SID_NAME_WKN_GRP) )
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{
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DEBUG(5,("sid2gid_lookupsid_recv: Sid %s is not a group.\n",
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state->request.data.sid));
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goto fail;
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}
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/* always use the async interface (may block) */
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winbindd_sid2gid_async(state->mem_ctx, &sid, sid2gid_recv, state);
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return;
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fail:
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/*
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* We have to set the cache ourselves here, the child which is
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* normally responsible was not queried yet.
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*/
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idmap_cache_set_sid2gid(&sid, -1);
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request_error(state);
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return;
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}
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void winbindd_sid_to_gid(struct winbindd_cli_state *state)
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{
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DOM_SID sid;
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gid_t gid;
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bool expired;
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/* Ensure null termination */
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state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
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DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
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state->request.data.sid));
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if (!string_to_sid(&sid, state->request.data.sid)) {
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DEBUG(1, ("Could not get convert sid %s from string\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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if (idmap_cache_find_sid2gid(&sid, &gid, &expired)) {
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DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
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(int)gid, expired ? " (expired)": ""));
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if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if (gid == -1) {
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DEBUG(10, ("Returning negative cache entry\n"));
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request_error(state);
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return;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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state->response.data.gid = gid;
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request_ok(state);
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return;
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}
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/* Validate the SID as a group. Hopefully this will hit cache.
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Needed to prevent DoS by exhausting the uid allocation
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range from random SIDs. */
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backend:
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winbindd_lookupsid_async( state->mem_ctx, &sid, sid2gid_lookupsid_recv, state );
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}
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static void set_mapping_recv(void *private_data, bool success)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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if (!success) {
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DEBUG(5, ("Could not set sid mapping\n"));
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request_error(state);
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return;
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}
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request_ok(state);
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}
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void winbindd_set_mapping(struct winbindd_cli_state *state)
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{
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struct id_map map;
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DOM_SID sid;
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DEBUG(3, ("[%5lu]: set id map\n", (unsigned long)state->pid));
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if ( ! state->privileged) {
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DEBUG(0, ("Only root is allowed to set mappings!\n"));
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request_error(state);
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return;
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}
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if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid)) {
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DEBUG(1, ("Could not get convert sid %s from string\n",
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state->request.data.sid));
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request_error(state);
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return;
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}
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map.sid = &sid;
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map.xid.id = state->request.data.dual_idmapset.id;
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map.xid.type = state->request.data.dual_idmapset.type;
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winbindd_set_mapping_async(state->mem_ctx, &map,
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set_mapping_recv, state);
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}
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static void set_hwm_recv(void *private_data, bool success)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data, struct winbindd_cli_state);
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if (!success) {
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DEBUG(5, ("Could not set sid mapping\n"));
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request_error(state);
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return;
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}
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request_ok(state);
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}
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void winbindd_set_hwm(struct winbindd_cli_state *state)
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{
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struct unixid xid;
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DEBUG(3, ("[%5lu]: set hwm\n", (unsigned long)state->pid));
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if ( ! state->privileged) {
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DEBUG(0, ("Only root is allowed to set mappings!\n"));
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request_error(state);
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return;
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}
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xid.id = state->request.data.dual_idmapset.id;
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xid.type = state->request.data.dual_idmapset.type;
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winbindd_set_hwm_async(state->mem_ctx, &xid, set_hwm_recv, state);
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}
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/* Convert a uid to a sid */
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static void uid2sid_recv(void *private_data, bool success, const char *sidstr)
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{
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struct winbindd_cli_state *state =
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(struct winbindd_cli_state *)private_data;
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struct dom_sid sid;
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if (!success || !string_to_sid(&sid, sidstr)) {
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ZERO_STRUCT(sid);
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idmap_cache_set_sid2uid(&sid, state->request.data.uid);
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request_error(state);
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return;
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}
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DEBUG(10,("uid2sid: uid %lu has sid %s\n",
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(unsigned long)(state->request.data.uid), sidstr));
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idmap_cache_set_sid2uid(&sid, state->request.data.uid);
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fstrcpy(state->response.data.sid.sid, sidstr);
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state->response.data.sid.type = SID_NAME_USER;
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request_ok(state);
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return;
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}
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void winbindd_uid_to_sid(struct winbindd_cli_state *state)
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{
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struct dom_sid sid;
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bool expired;
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DEBUG(3, ("[%5lu]: uid to sid %lu\n", (unsigned long)state->pid,
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(unsigned long)state->request.data.uid));
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if (idmap_cache_find_uid2sid(state->request.data.uid, &sid,
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&expired)) {
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DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n",
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(int)state->request.data.uid,
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expired ? " (expired)": ""));
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if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if (is_null_sid(&sid)) {
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DEBUG(10, ("Returning negative cache entry\n"));
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request_error(state);
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return;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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sid_to_fstring(state->response.data.sid.sid, &sid);
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request_ok(state);
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return;
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}
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/* always go via the async interface (may block) */
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backend:
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winbindd_uid2sid_async(state->mem_ctx, state->request.data.uid, uid2sid_recv, state);
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}
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/* Convert a gid to a sid */
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static void gid2sid_recv(void *private_data, bool success, const char *sidstr)
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{
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struct winbindd_cli_state *state =
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(struct winbindd_cli_state *)private_data;
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struct dom_sid sid;
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if (!success || !string_to_sid(&sid, sidstr)) {
|
|
ZERO_STRUCT(sid);
|
|
idmap_cache_set_sid2gid(&sid, state->request.data.gid);
|
|
request_error(state);
|
|
return;
|
|
}
|
|
DEBUG(10,("gid2sid: gid %lu has sid %s\n",
|
|
(unsigned long)(state->request.data.gid), sidstr));
|
|
|
|
idmap_cache_set_sid2gid(&sid, state->request.data.gid);
|
|
fstrcpy(state->response.data.sid.sid, sidstr);
|
|
state->response.data.sid.type = SID_NAME_DOM_GRP;
|
|
request_ok(state);
|
|
return;
|
|
}
|
|
|
|
|
|
void winbindd_gid_to_sid(struct winbindd_cli_state *state)
|
|
{
|
|
struct dom_sid sid;
|
|
bool expired;
|
|
|
|
DEBUG(3, ("[%5lu]: gid to sid %lu\n", (unsigned long)state->pid,
|
|
(unsigned long)state->request.data.gid));
|
|
|
|
if (idmap_cache_find_gid2sid(state->request.data.gid, &sid,
|
|
&expired)) {
|
|
DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
|
|
(int)state->request.data.gid,
|
|
expired ? " (expired)": ""));
|
|
if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
|
|
DEBUG(10, ("revalidating expired entry\n"));
|
|
goto backend;
|
|
}
|
|
if (is_null_sid(&sid)) {
|
|
DEBUG(10, ("Returning negative cache entry\n"));
|
|
request_error(state);
|
|
return;
|
|
}
|
|
DEBUG(10, ("Returning positive cache entry\n"));
|
|
sid_to_fstring(state->response.data.sid.sid, &sid);
|
|
request_ok(state);
|
|
return;
|
|
}
|
|
|
|
/* always use async calls (may block) */
|
|
backend:
|
|
winbindd_gid2sid_async(state->mem_ctx, state->request.data.gid, gid2sid_recv, state);
|
|
}
|
|
|
|
void winbindd_allocate_uid(struct winbindd_cli_state *state)
|
|
{
|
|
if ( !state->privileged ) {
|
|
DEBUG(2, ("winbindd_allocate_uid: non-privileged access "
|
|
"denied!\n"));
|
|
request_error(state);
|
|
return;
|
|
}
|
|
|
|
sendto_child(state, idmap_child());
|
|
}
|
|
|
|
enum winbindd_result winbindd_dual_allocate_uid(struct winbindd_domain *domain,
|
|
struct winbindd_cli_state *state)
|
|
{
|
|
struct unixid xid;
|
|
|
|
if (!NT_STATUS_IS_OK(idmap_allocate_uid(&xid))) {
|
|
return WINBINDD_ERROR;
|
|
}
|
|
state->response.data.uid = xid.id;
|
|
return WINBINDD_OK;
|
|
}
|
|
|
|
void winbindd_allocate_gid(struct winbindd_cli_state *state)
|
|
{
|
|
if ( !state->privileged ) {
|
|
DEBUG(2, ("winbindd_allocate_gid: non-privileged access "
|
|
"denied!\n"));
|
|
request_error(state);
|
|
return;
|
|
}
|
|
|
|
sendto_child(state, idmap_child());
|
|
}
|
|
|
|
enum winbindd_result winbindd_dual_allocate_gid(struct winbindd_domain *domain,
|
|
struct winbindd_cli_state *state)
|
|
{
|
|
struct unixid xid;
|
|
|
|
if (!NT_STATUS_IS_OK(idmap_allocate_gid(&xid))) {
|
|
return WINBINDD_ERROR;
|
|
}
|
|
state->response.data.gid = xid.id;
|
|
return WINBINDD_OK;
|
|
}
|