/* Unix SMB/CIFS implementation. idmap PASSDB backend Copyright (C) Simo Sorce 2006 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 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, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "winbindd.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_IDMAP /***************************** Initialise idmap database. *****************************/ static NTSTATUS idmap_nss_int_init(struct idmap_domain *dom, const char *params) { return NT_STATUS_OK; } /********************************** lookup a set of unix ids. **********************************/ static NTSTATUS idmap_nss_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids) { TALLOC_CTX *ctx; int i; /* initialize the status to avoid suprise */ for (i = 0; ids[i]; i++) { ids[i]->status = ID_UNKNOWN; } ctx = talloc_new(dom); if ( ! ctx) { DEBUG(0, ("Out of memory!\n")); return NT_STATUS_NO_MEMORY; } for (i = 0; ids[i]; i++) { struct passwd *pw; struct group *gr; const char *name; enum lsa_SidType type; bool ret; switch (ids[i]->xid.type) { case ID_TYPE_UID: pw = getpwuid((uid_t)ids[i]->xid.id); if (!pw) { ids[i]->status = ID_UNMAPPED; continue; } name = pw->pw_name; break; case ID_TYPE_GID: gr = getgrgid((gid_t)ids[i]->xid.id); if (!gr) { ids[i]->status = ID_UNMAPPED; continue; } name = gr->gr_name; break; default: /* ?? */ ids[i]->status = ID_UNKNOWN; continue; } /* by default calls to winbindd are disabled the following call will not recurse so this is safe */ (void)winbind_on(); /* Lookup name from PDC using lsa_lookup_names() */ ret = winbind_lookup_name(dom->name, name, ids[i]->sid, &type); (void)winbind_off(); if (!ret) { /* TODO: how do we know if the name is really not mapped, * or something just failed ? */ ids[i]->status = ID_UNMAPPED; continue; } switch (type) { case SID_NAME_USER: if (ids[i]->xid.type == ID_TYPE_UID) { ids[i]->status = ID_MAPPED; } break; case SID_NAME_DOM_GRP: case SID_NAME_ALIAS: case SID_NAME_WKN_GRP: if (ids[i]->xid.type == ID_TYPE_GID) { ids[i]->status = ID_MAPPED; } break; default: ids[i]->status = ID_UNKNOWN; break; } } talloc_free(ctx); return NT_STATUS_OK; } /********************************** lookup a set of sids. **********************************/ static NTSTATUS idmap_nss_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids) { TALLOC_CTX *ctx; int i; /* initialize the status to avoid suprise */ for (i = 0; ids[i]; i++) { ids[i]->status = ID_UNKNOWN; } ctx = talloc_new(dom); if ( ! ctx) { DEBUG(0, ("Out of memory!\n")); return NT_STATUS_NO_MEMORY; } for (i = 0; ids[i]; i++) { struct group *gr; enum lsa_SidType type; const char *dom_name = NULL; const char *name = NULL; bool ret; /* by default calls to winbindd are disabled the following call will not recurse so this is safe */ (void)winbind_on(); ret = winbind_lookup_sid(ctx, ids[i]->sid, &dom_name, &name, &type); (void)winbind_off(); if (!ret) { /* TODO: how do we know if the name is really not mapped, * or something just failed ? */ ids[i]->status = ID_UNMAPPED; continue; } switch (type) { case SID_NAME_USER: { struct passwd *pw; /* this will find also all lower case name and use username level */ pw = Get_Pwnam_alloc(talloc_tos(), name); if (pw) { ids[i]->xid.id = pw->pw_uid; ids[i]->xid.type = ID_TYPE_UID; ids[i]->status = ID_MAPPED; } TALLOC_FREE(pw); break; } case SID_NAME_DOM_GRP: case SID_NAME_ALIAS: case SID_NAME_WKN_GRP: gr = getgrnam(name); if (gr) { ids[i]->xid.id = gr->gr_gid; ids[i]->xid.type = ID_TYPE_GID; ids[i]->status = ID_MAPPED; } break; default: ids[i]->status = ID_UNKNOWN; break; } } talloc_free(ctx); return NT_STATUS_OK; } /********************************** Close the idmap tdb instance **********************************/ static NTSTATUS idmap_nss_close(struct idmap_domain *dom) { return NT_STATUS_OK; } static struct idmap_methods nss_methods = { .init = idmap_nss_int_init, .unixids_to_sids = idmap_nss_unixids_to_sids, .sids_to_unixids = idmap_nss_sids_to_unixids, .close_fn = idmap_nss_close }; NTSTATUS idmap_nss_init(void) { return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "nss", &nss_methods); }