#include "includes.h"
static DOM_SID *global_sam_sid=NULL;
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_PASSDB
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;
}
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);
for (i = 0; i < 3; i++)
sid->sub_auths[sid->num_auths++] = IVAL(raw_sid_data, i*4);
}
static DOM_SID *pdb_generate_sam_sid(void)
{
DOM_SID domain_sid;
char *fname = NULL;
BOOL is_dc = False;
DOM_SID *sam_sid;
if(!(sam_sid=SMB_MALLOC_P(DOM_SID)))
return NULL;
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 (is_dc) {
if (secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
sid_copy(sam_sid, &domain_sid);
return sam_sid;
}
}
if (secrets_fetch_domain_sid(global_myname(), sam_sid)) {
if (!is_dc)
return sam_sid;
if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
SAFE_FREE(sam_sid);
return NULL;
}
return sam_sid;
}
if (!sid_equal(&domain_sid, sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
if (!secrets_store_domain_sid(global_myname(), &domain_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID for local sid as PDC/BDC.\n"));
SAFE_FREE(sam_sid);
return NULL;
}
return sam_sid;
}
return sam_sid;
}
asprintf(&fname, "%s/MACHINE.SID", lp_private_dir());
if (read_sid_from_file(fname, sam_sid)) {
if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file.\n"));
SAFE_FREE(fname);
SAFE_FREE(sam_sid);
return NULL;
}
unlink(fname);
if (is_dc) {
if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file.\n"));
SAFE_FREE(fname);
SAFE_FREE(sam_sid);
return NULL;
}
}
SAFE_FREE(fname);
return sam_sid;
}
SAFE_FREE(fname);
generate_random_sid(sam_sid);
if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID.\n"));
SAFE_FREE(sam_sid);
return NULL;
}
if (is_dc) {
if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID.\n"));
SAFE_FREE(sam_sid);
return NULL;
}
}
return sam_sid;
}
DOM_SID *get_global_sam_sid(void)
{
if (global_sam_sid != NULL)
return global_sam_sid;
if (!(global_sam_sid = pdb_generate_sam_sid())) {
smb_panic("Could not generate a machine SID\n");
}
return global_sam_sid;
}
void reset_global_sam_sid(void)
{
SAFE_FREE(global_sam_sid);
}