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Diffstat (limited to 'source4/nsswitch/winbindd_util.c')
| -rw-r--r-- | source4/nsswitch/winbindd_util.c | 553 |
1 files changed, 553 insertions, 0 deletions
diff --git a/source4/nsswitch/winbindd_util.c b/source4/nsswitch/winbindd_util.c new file mode 100644 index 0000000000..7ccf032041 --- /dev/null +++ b/source4/nsswitch/winbindd_util.c @@ -0,0 +1,553 @@ +/* + Unix SMB/CIFS implementation. + + Winbind daemon for ntdom nss module + + Copyright (C) Tim Potter 2000-2001 + Copyright (C) 2001 by Martin Pool <mbp@samba.org> + + 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 + (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. +*/ + +#include "winbindd.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_WINBIND + +/** + * @file winbindd_util.c + * + * Winbind daemon for NT domain authentication nss module. + **/ + + +/** + * Used to clobber name fields that have an undefined value. + * + * Correct code should never look at a field that has this value. + **/ + +static const fstring name_deadbeef = "<deadbeef>"; + +/* The list of trusted domains. Note that the list can be deleted and + recreated using the init_domain_list() function so pointers to + individual winbindd_domain structures cannot be made. Keep a copy of + the domain name instead. */ + +static struct winbindd_domain *_domain_list; + +struct winbindd_domain *domain_list(void) +{ + /* Initialise list */ + + if (!_domain_list) + init_domain_list(); + + return _domain_list; +} + +/* Free all entries in the trusted domain list */ + +void free_domain_list(void) +{ + struct winbindd_domain *domain = _domain_list; + + while(domain) { + struct winbindd_domain *next = domain->next; + + DLIST_REMOVE(_domain_list, domain); + SAFE_FREE(domain); + domain = next; + } +} + + +/* Add a trusted domain to our list of domains */ +static struct winbindd_domain *add_trusted_domain(const char *domain_name, const char *alt_name, + struct winbindd_methods *methods, + DOM_SID *sid) +{ + struct winbindd_domain *domain; + + /* We can't call domain_list() as this function is called from + init_domain_list() and we'll get stuck in a loop. */ + for (domain = _domain_list; domain; domain = domain->next) { + if (strcasecmp(domain_name, domain->name) == 0 || + strcasecmp(domain_name, domain->alt_name) == 0) { + return domain; + } + if (alt_name && *alt_name) { + if (strcasecmp(alt_name, domain->name) == 0 || + strcasecmp(alt_name, domain->alt_name) == 0) { + return domain; + } + } + } + + /* Create new domain entry */ + + if ((domain = (struct winbindd_domain *) + malloc(sizeof(*domain))) == NULL) + return NULL; + + /* Fill in fields */ + + ZERO_STRUCTP(domain); + + /* prioritise the short name */ + if (strchr_m(domain_name, '.') && alt_name && *alt_name) { + fstrcpy(domain->name, alt_name); + fstrcpy(domain->alt_name, domain_name); + } else { + fstrcpy(domain->name, domain_name); + if (alt_name) { + fstrcpy(domain->alt_name, alt_name); + } + } + + domain->methods = methods; + domain->sequence_number = DOM_SEQUENCE_NONE; + domain->last_seq_check = 0; + if (sid) { + sid_copy(&domain->sid, sid); + } + + /* see if this is a native mode win2k domain, but only for our own domain */ + + if ( strequal( lp_workgroup(), domain_name) ) { + domain->native_mode = cm_check_for_native_mode_win2k( domain_name ); + DEBUG(3,("add_trusted_domain: %s is a %s mode domain\n", domain_name, + domain->native_mode ? "native" : "mixed" )); + } + + /* Link to domain list */ + DLIST_ADD(_domain_list, domain); + + DEBUG(1,("Added domain %s %s %s\n", + domain->name, domain->alt_name, + sid?sid_string_static(&domain->sid):"")); + + return domain; +} + + +/* + rescan our domains looking for new trusted domains + */ +void rescan_trusted_domains(BOOL force) +{ + struct winbindd_domain *domain; + TALLOC_CTX *mem_ctx; + static time_t last_scan; + time_t t = time(NULL); + + /* trusted domains might be disabled */ + if (!lp_allow_trusted_domains()) { + return; + } + + /* Only rescan every few minutes but force if necessary */ + + if (((unsigned)(t - last_scan) < WINBINDD_RESCAN_FREQ) && !force) + return; + + last_scan = t; + + DEBUG(1, ("scanning trusted domain list\n")); + + if (!(mem_ctx = talloc_init("init_domain_list"))) + return; + + for (domain = _domain_list; domain; domain = domain->next) { + NTSTATUS result; + char **names; + char **alt_names; + int num_domains = 0; + DOM_SID *dom_sids; + int i; + + result = domain->methods->trusted_domains(domain, mem_ctx, &num_domains, + &names, &alt_names, &dom_sids); + if (!NT_STATUS_IS_OK(result)) { + continue; + } + + /* Add each domain to the trusted domain list. Each domain inherits + the access methods of its parent */ + for(i = 0; i < num_domains; i++) { + DEBUG(10,("Found domain %s\n", names[i])); + add_trusted_domain(names[i], alt_names?alt_names[i]:NULL, + domain->methods, &dom_sids[i]); + + /* store trusted domain in the cache */ + trustdom_cache_store(mem_ctx, names[i], alt_names ? alt_names[i] : NULL, + &dom_sids[i], t + WINBINDD_RESCAN_FREQ); + } + } + + talloc_destroy(mem_ctx); +} + +/* Look up global info for the winbind daemon */ +BOOL init_domain_list(void) +{ + extern struct winbindd_methods cache_methods; + struct winbindd_domain *domain; + + /* Free existing list */ + free_domain_list(); + + /* Add ourselves as the first entry */ + domain = add_trusted_domain(lp_workgroup(), NULL, &cache_methods, NULL); + if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) { + DEBUG(1, ("Could not fetch sid for our domain %s\n", + domain->name)); + return False; + } + + /* get any alternate name for the primary domain */ + cache_methods.alternate_name(domain); + + /* do an initial scan for trusted domains */ + rescan_trusted_domains(True); + + return True; +} + +/* Given a domain name, return the struct winbindd domain info for it + if it is actually working. */ + +struct winbindd_domain *find_domain_from_name(const char *domain_name) +{ + struct winbindd_domain *domain; + + /* Search through list */ + + for (domain = domain_list(); domain != NULL; domain = domain->next) { + if (strequal(domain_name, domain->name) || + (domain->alt_name[0] && strequal(domain_name, domain->alt_name))) + return domain; + } + + /* Not found */ + + return NULL; +} + +/* Given a domain sid, return the struct winbindd domain info for it */ + +struct winbindd_domain *find_domain_from_sid(DOM_SID *sid) +{ + struct winbindd_domain *domain; + + /* Search through list */ + + for (domain = domain_list(); domain != NULL; domain = domain->next) { + if (sid_compare_domain(sid, &domain->sid) == 0) + return domain; + } + + /* Not found */ + + return NULL; +} + +/* Lookup a sid in a domain from a name */ + +BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain, + const char *name, DOM_SID *sid, + enum SID_NAME_USE *type) +{ + NTSTATUS result; + TALLOC_CTX *mem_ctx; + /* Don't bother with machine accounts */ + + if (name[strlen(name) - 1] == '$') + return False; + + mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name); + if (!mem_ctx) + return False; + + /* Lookup name */ + result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type); + + talloc_destroy(mem_ctx); + + /* Return rid and type if lookup successful */ + if (!NT_STATUS_IS_OK(result)) { + *type = SID_NAME_UNKNOWN; + } + + return NT_STATUS_IS_OK(result); +} + +/** + * @brief Lookup a name in a domain from a sid. + * + * @param sid Security ID you want to look up. + * + * @param name On success, set to the name corresponding to @p sid. + * + * @param dom_name On success, set to the 'domain name' corresponding to @p sid. + * + * @param type On success, contains the type of name: alias, group or + * user. + * + * @retval True if the name exists, in which case @p name and @p type + * are set, otherwise False. + **/ +BOOL winbindd_lookup_name_by_sid(DOM_SID *sid, + fstring dom_name, + fstring name, + enum SID_NAME_USE *type) +{ + char *names; + NTSTATUS result; + TALLOC_CTX *mem_ctx; + BOOL rv = False; + struct winbindd_domain *domain; + + domain = find_domain_from_sid(sid); + + if (!domain) { + DEBUG(1,("Can't find domain from sid\n")); + return False; + } + + /* Lookup name */ + + if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid"))) + return False; + + result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type); + + /* Return name and type if successful */ + + if ((rv = NT_STATUS_IS_OK(result))) { + fstrcpy(dom_name, domain->name); + fstrcpy(name, names); + } else { + *type = SID_NAME_UNKNOWN; + fstrcpy(name, name_deadbeef); + } + + talloc_destroy(mem_ctx); + + return rv; +} + + +/* Free state information held for {set,get,end}{pw,gr}ent() functions */ + +void free_getent_state(struct getent_state *state) +{ + struct getent_state *temp; + + /* Iterate over state list */ + + temp = state; + + while(temp != NULL) { + struct getent_state *next; + + /* Free sam entries then list entry */ + + SAFE_FREE(state->sam_entries); + DLIST_REMOVE(state, state); + next = temp->next; + + SAFE_FREE(temp); + temp = next; + } +} + +/* Parse winbindd related parameters */ + +BOOL winbindd_param_init(void) +{ + /* Parse winbind uid and winbind_gid parameters */ + + if (!lp_winbind_uid(&server_state.uid_low, &server_state.uid_high)) { + DEBUG(0, ("winbind uid range missing or invalid\n")); + return False; + } + + if (!lp_winbind_gid(&server_state.gid_low, &server_state.gid_high)) { + DEBUG(0, ("winbind gid range missing or invalid\n")); + return False; + } + + return True; +} + +/* Check if a domain is present in a comma-separated list of domains */ + +BOOL check_domain_env(char *domain_env, char *domain) +{ + fstring name; + const char *tmp = domain_env; + + while(next_token(&tmp, name, ",", sizeof(fstring))) { + if (strequal(name, domain)) + return True; + } + + return False; +} + +/* Parse a string of the form DOMAIN/user into a domain and a user */ + +BOOL parse_domain_user(const char *domuser, fstring domain, fstring user) +{ + char *p = strchr(domuser,*lp_winbind_separator()); + + if (!(p || lp_winbind_use_default_domain())) + return False; + + if(!p && lp_winbind_use_default_domain()) { + fstrcpy(user, domuser); + fstrcpy(domain, lp_workgroup()); + } else { + fstrcpy(user, p+1); + fstrcpy(domain, domuser); + domain[PTR_DIFF(p, domuser)] = 0; + } + strupper(domain); + return True; +} + +/* + Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and + 'winbind separator' options. + This means: + - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is + lp_workgroup + +*/ +void fill_domain_username(fstring name, const char *domain, const char *user) +{ + if(lp_winbind_use_default_domain() && + !strcmp(lp_workgroup(), domain)) { + strlcpy(name, user, sizeof(fstring)); + } else { + slprintf(name, sizeof(fstring) - 1, "%s%s%s", + domain, lp_winbind_separator(), + user); + } +} + +/* + * Winbindd socket accessor functions + */ + +/* Open the winbindd socket */ + +static int _winbindd_socket = -1; + +int open_winbindd_socket(void) +{ + if (_winbindd_socket == -1) { + _winbindd_socket = create_pipe_sock( + WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755); + DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n", + _winbindd_socket)); + } + + return _winbindd_socket; +} + +/* Close the winbindd socket */ + +void close_winbindd_socket(void) +{ + if (_winbindd_socket != -1) { + DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n", + _winbindd_socket)); + close(_winbindd_socket); + _winbindd_socket = -1; + } +} + +/* + * Client list accessor functions + */ + +static struct winbindd_cli_state *_client_list; +static int _num_clients; + +/* Return list of all connected clients */ + +struct winbindd_cli_state *winbindd_client_list(void) +{ + return _client_list; +} + +/* Add a connection to the list */ + +void winbindd_add_client(struct winbindd_cli_state *cli) +{ + DLIST_ADD(_client_list, cli); + _num_clients++; +} + +/* Remove a client from the list */ + +void winbindd_remove_client(struct winbindd_cli_state *cli) +{ + DLIST_REMOVE(_client_list, cli); + _num_clients--; +} + +/* Close all open clients */ + +void winbindd_kill_all_clients(void) +{ + struct winbindd_cli_state *cl = winbindd_client_list(); + + DEBUG(10, ("winbindd_kill_all_clients: going postal\n")); + + while (cl) { + struct winbindd_cli_state *next; + + next = cl->next; + winbindd_remove_client(cl); + cl = next; + } +} + +/* Return number of open clients */ + +int winbindd_num_clients(void) +{ + return _num_clients; +} + +/* Help with RID -> SID conversion */ + +DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain, + TALLOC_CTX *mem_ctx, + uint32 rid) +{ + DOM_SID *sid; + sid = talloc(mem_ctx, sizeof(*sid)); + if (!sid) { + smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n"); + } + sid_copy(sid, &domain->sid); + sid_append_rid(sid, rid); + return sid; +} + |