diff options
Diffstat (limited to 'source4/passdb/machine_sid.c')
| -rw-r--r-- | source4/passdb/machine_sid.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/source4/passdb/machine_sid.c b/source4/passdb/machine_sid.c new file mode 100644 index 0000000000..f19b4a0c1d --- /dev/null +++ b/source4/passdb/machine_sid.c @@ -0,0 +1,192 @@ +/* + Unix SMB/CIFS implementation. + Password and authentication handling + Copyright (C) Jeremy Allison 1996-2002 + Copyright (C) Andrew Tridgell 2002 + Copyright (C) Gerald (Jerry) Carter 2000 + Copyright (C) Stefan (metze) Metzmacher 2002 + + 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 "includes.h" + +/* NOTE! the global_sam_sid is the SID of our local SAM. This is only + equal to the domain SID when we are a DC, otherwise its our + workstation SID */ +static DOM_SID *global_sam_sid=NULL; + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_PASSDB + +/**************************************************************************** + Read a SID from a file. This is for compatibility with the old MACHINE.SID + style of SID storage +****************************************************************************/ +static BOOL read_sid_from_file(const char *fname, DOM_SID *sid) +{ + char **lines; + int numlines; + BOOL ret; + + lines = file_lines_load(fname, &numlines); + + if (!lines || numlines < 1) { + if (lines) file_lines_free(lines); + return False; + } + + ret = string_to_sid(sid, lines[0]); + file_lines_free(lines); + return ret; +} + +/* + generate a random sid - used to build our own sid if we don't have one +*/ +static void generate_random_sid(DOM_SID *sid) +{ + int i; + uchar raw_sid_data[12]; + + memset((char *)sid, '\0', sizeof(*sid)); + sid->sid_rev_num = 1; + sid->id_auth[5] = 5; + sid->num_auths = 0; + sid->sub_auths[sid->num_auths++] = 21; + + generate_random_buffer(raw_sid_data, 12, True); + for (i = 0; i < 3; i++) + sid->sub_auths[sid->num_auths++] = IVAL(raw_sid_data, i*4); +} + +/**************************************************************************** + Generate the global machine sid. +****************************************************************************/ + +static BOOL pdb_generate_sam_sid(void) +{ + char *fname = NULL; + BOOL is_dc = False; + + if(global_sam_sid==NULL) + if(!(global_sam_sid=(DOM_SID *)malloc(sizeof(DOM_SID)))) + return False; + + generate_wellknown_sids(); + + switch (lp_server_role()) { + case ROLE_DOMAIN_PDC: + case ROLE_DOMAIN_BDC: + is_dc = True; + break; + default: + is_dc = False; + break; + } + + if (secrets_fetch_domain_sid(lp_netbios_name(), global_sam_sid)) { + DOM_SID domain_sid; + + /* We got our sid. If not a pdc/bdc, we're done. */ + if (!is_dc) + return True; + + if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) { + + /* No domain sid and we're a pdc/bdc. Store it */ + + if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n")); + return False; + } + return True; + } + + if (!sid_equal(&domain_sid, global_sam_sid)) { + + /* Domain name sid doesn't match global sam sid. Re-store global sam sid as domain sid. */ + + DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n")); + if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID as a pdc/bdc.\n")); + return False; + } + return True; + } + + return True; + + } + + /* check for an old MACHINE.SID file for backwards compatibility */ + asprintf(&fname, "%s/MACHINE.SID", lp_private_dir()); + + if (read_sid_from_file(fname, global_sam_sid)) { + /* remember it for future reference and unlink the old MACHINE.SID */ + if (!secrets_store_domain_sid(lp_netbios_name(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file-1.\n")); + SAFE_FREE(fname); + return False; + } + unlink(fname); + if (is_dc) { + if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file-2.\n")); + SAFE_FREE(fname); + return False; + } + } + + /* Stored the old sid from MACHINE.SID successfully.*/ + SAFE_FREE(fname); + return True; + } + + SAFE_FREE(fname); + + /* we don't have the SID in secrets.tdb, we will need to + generate one and save it */ + generate_random_sid(global_sam_sid); + + if (!secrets_store_domain_sid(lp_netbios_name(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID-3, nb name=%s.\n", lp_netbios_name())); + return False; + } + if (is_dc) { + if (!secrets_store_domain_sid(lp_workgroup(), global_sam_sid)) { + DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID-4, wg name=%s.\n", lp_workgroup())); + return False; + } + } + + return True; +} + +/* return our global_sam_sid */ +DOM_SID *get_global_sam_sid(void) +{ + if (global_sam_sid != NULL) + return global_sam_sid; + + /* memory for global_sam_sid is allocated in + pdb_generate_sam_sid() as needed */ + + if (!pdb_generate_sam_sid()) + global_sam_sid=NULL; + + return global_sam_sid; +} + |