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-rw-r--r--source/passdb/machine_sid.c309
1 files changed, 114 insertions, 195 deletions
diff --git a/source/passdb/machine_sid.c b/source/passdb/machine_sid.c
index e374b0657d6..f7ed3811b97 100644
--- a/source/passdb/machine_sid.c
+++ b/source/passdb/machine_sid.c
@@ -2,8 +2,8 @@
Unix SMB/Netbios implementation.
Version 1.9.
Password and authentication handling
- Copyright (C) Jeremy Allison 1996-1998
- Copyright (C) Luke Kenneth Casson Leighton 1996-1998
+ Copyright (C) Jeremy Allison 1996-2002
+ Copyright (C) Andrew Tridgell 2002
Copyright (C) Gerald (Jerry) Carter 2000
This program is free software; you can redistribute it and/or modify
@@ -27,29 +27,45 @@
Read the machine SID from a file.
****************************************************************************/
-static BOOL read_sid_from_file(int fd, char *sid_file)
+static BOOL read_sid_from_file(char *fname, DOM_SID *sid)
{
- fstring fline;
+ char **lines;
+ int numlines;
+ BOOL ret;
- memset(fline, '\0', sizeof(fline));
+ lines = file_lines_load(fname, &numlines, False);
- if(read(fd, fline, sizeof(fline) -1 ) < 0) {
- DEBUG(0,("unable to read file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- return False;
- }
+ if (!lines || numlines < 1) {
+ if (lines)
+ file_lines_free(lines);
+ return False;
+ }
- /*
- * Convert to the machine SID.
- */
+ ret = string_to_sid(sid, lines[0]);
+ if (!ret)
+ DEBUG(0,("read_sid_from_file: Failed to convert machine SID. (%s)\n", lines[0]));
+ file_lines_free(lines);
+ return ret;
+}
- fline[sizeof(fline)-1] = '\0';
- if(!string_to_sid( &global_sam_sid, fline)) {
- DEBUG(0,("unable to generate machine SID.\n"));
- return False;
- }
+/****************************************************************************
+ Generate a random sid - used to build our own sid if we don't have one.
+****************************************************************************/
- return True;
+static void generate_random_sid(DOM_SID *sid)
+{
+ int i;
+ unsigned char 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);
}
/****************************************************************************
@@ -60,196 +76,99 @@ static BOOL read_sid_from_file(int fd, char *sid_file)
BOOL pdb_generate_sam_sid(void)
{
- int fd;
- pstring sid_file;
- fstring sid_string;
- SMB_STRUCT_STAT st;
- BOOL overwrite_bad_sid = False;
+ char *fname = NULL;
+ extern pstring global_myname;
+ extern fstring global_myworkgroup;
+ BOOL is_dc = False;
+ pstring priv_dir;
generate_wellknown_sids();
- get_private_directory(sid_file);
-
- if (!directory_exist(sid_file, NULL)) {
- if (mkdir(sid_file, 0700) != 0) {
- DEBUG(0,("can't create private directory %s : %s\n",
- sid_file, strerror(errno)));
- return False;
- }
+ switch (lp_server_role()) {
+ case ROLE_DOMAIN_PDC:
+ case ROLE_DOMAIN_BDC:
+ is_dc = True;
+ break;
+ default:
+ is_dc = False;
+ break;
}
- pstrcat(sid_file, "/MACHINE.SID");
-
- if((fd = sys_open(sid_file, O_RDWR | O_CREAT, 0644)) == -1) {
- DEBUG(0,("unable to open or create file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- return False;
- }
-
- /*
- * Check if the file contains data.
- */
-
- if(sys_fstat( fd, &st) < 0) {
- DEBUG(0,("unable to stat file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
- return False;
- }
-
- if(st.st_size > 0) {
- /*
- * We have a valid SID - read it.
- */
- if(!read_sid_from_file( fd, sid_file)) {
- DEBUG(0,("unable to read file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
- return False;
+ if (secrets_fetch_domain_sid(global_myname, &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(global_myworkgroup, &domain_sid)) {
+
+ /* No domain sid and we're a pdc/bdc. Store it */
+
+ if (!secrets_store_domain_sid(global_myworkgroup, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
+ return False;
+ }
+ return True;
}
- /*
- * JRA. Reversed the sense of this test now that I have
- * actually done this test *personally*. One more reason
- * to never trust third party information you have not
- * independently verified.... sigh. JRA.
- */
-
- if(global_sam_sid.num_auths > 0 && global_sam_sid.sub_auths[0] == 0x21) {
- /*
- * Fix and re-write...
- */
- overwrite_bad_sid = True;
- global_sam_sid.sub_auths[0] = 21;
- DEBUG(5,("pdb_generate_sam_sid: Old (incorrect) sid id_auth of hex 21 \
-detected - re-writing to be decimal 21 instead.\n" ));
- sid_to_string(sid_string, &global_sam_sid);
- if(sys_lseek(fd, (SMB_OFF_T)0, SEEK_SET) != 0) {
- DEBUG(0,("unable to seek file file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
+ 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(global_myworkgroup, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID as a pdc/bdc.\n"));
return False;
}
- } else {
- close(fd);
return True;
}
- } else {
- /*
- * The file contains no data - we need to generate our
- * own sid.
- * Generate the new sid data & turn it into a string.
- */
- int i;
- uchar raw_sid_data[12];
- DOM_SID mysid;
-
- memset((char *)&mysid, '\0', sizeof(DOM_SID));
- mysid.sid_rev_num = 1;
- mysid.id_auth[5] = 5;
- mysid.num_auths = 0;
- mysid.sub_auths[mysid.num_auths++] = 21;
-
- generate_random_buffer( raw_sid_data, 12, True);
- for( i = 0; i < 3; i++)
- mysid.sub_auths[mysid.num_auths++] = IVAL(raw_sid_data, i*4);
-
- sid_to_string(sid_string, &mysid);
- }
-
- fstrcat(sid_string, "\n");
-
- /*
- * Ensure our new SID is valid.
- */
-
- if(!string_to_sid( &global_sam_sid, sid_string)) {
- DEBUG(0,("unable to generate machine SID.\n"));
- return False;
- }
-
- /*
- * Do an exclusive blocking lock on the file.
- */
-
- if(!do_file_lock( fd, 60, F_WRLCK)) {
- DEBUG(0,("unable to lock file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
- return False;
- }
-
- if(!overwrite_bad_sid) {
- /*
- * At this point we have a blocking lock on the SID
- * file - check if in the meantime someone else wrote
- * SID data into the file. If so - they were here first,
- * use their data.
- */
-
- if(sys_fstat( fd, &st) < 0) {
- DEBUG(0,("unable to stat file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
+
+ return True;
+ }
+
+ /* check for an old MACHINE.SID file for backwards compatibility */
+ get_private_directory(priv_dir);
+ asprintf(&fname, "%s/MACHINE.SID", priv_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(global_myname, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file.\n"));
+ SAFE_FREE(fname);
return False;
- }
-
- if(st.st_size > 0) {
- /*
- * Unlock as soon as possible to reduce
- * contention on the exclusive lock.
- */
- do_file_lock( fd, 60, F_UNLCK);
-
- /*
- * We have a valid SID - read it.
- */
-
- if(!read_sid_from_file( fd, sid_file)) {
- DEBUG(0,("unable to read file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- close(fd);
+ }
+ unlink(fname);
+ if (is_dc) {
+ if (!secrets_store_domain_sid(global_myworkgroup, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file.\n"));
+ SAFE_FREE(fname);
return False;
}
- close(fd);
- return True;
- }
+ }
+
+ /* Stored the old sid from MACHINE.SID successfully.
+ Patch from Stefan "metze" Metzmacher <metze@metzemix.de>*/
+ SAFE_FREE(fname);
+ return True;
}
-
- /*
- * The file is still empty and we have an exlusive lock on it,
- * or we're fixing an earlier mistake.
- * Write out out SID data into the file.
- */
-
- /*
- * Use chmod here as some (strange) UNIX's don't
- * have fchmod. JRA.
- */
-
- if(chmod(sid_file, 0644) < 0) {
- DEBUG(0,("unable to set correct permissions on file %s. \
-Error was %s\n", sid_file, strerror(errno) ));
- do_file_lock( fd, 60, F_UNLCK);
- close(fd);
- return False;
- }
-
- if(write( fd, sid_string, strlen(sid_string)) != strlen(sid_string)) {
- DEBUG(0,("unable to write file %s. Error was %s\n",
- sid_file, strerror(errno) ));
- do_file_lock( fd, 60, F_UNLCK);
- close(fd);
- return False;
- }
-
- /*
- * Unlock & exit.
- */
-
- do_file_lock( fd, 60, F_UNLCK);
- close(fd);
- 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(global_myname, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID.\n"));
+ return False;
+ }
+ if (is_dc) {
+ if (!secrets_store_domain_sid(global_myworkgroup, &global_sam_sid)) {
+ DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID.\n"));
+ return False;
+ }
+ }
+
+ return True;
+}
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