-/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+/*
+ Unix SMB/CIFS implementation.
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
-
+ 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
+ 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "passdb/machine_sid.h"
+#include "secrets.h"
+#include "dbwrap/dbwrap.h"
+#include "../libcli/security/security.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 struct dom_sid *global_sam_sid=NULL;
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
/****************************************************************************
- Read the machine SID from a file.
+ 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(int fd, char *sid_file)
+static bool read_sid_from_file(const char *fname, struct dom_sid *sid)
{
- fstring fline;
+ char **lines;
+ int numlines;
+ bool ret;
- memset(fline, '\0', sizeof(fline));
+ lines = file_lines_load(fname, &numlines,0, NULL);
- 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) {
+ TALLOC_FREE(lines);
+ return False;
+ }
- /*
- * Convert to the machine SID.
- */
+ ret = string_to_sid(sid, lines[0]);
+ TALLOC_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
+*/
+static void generate_random_sid(struct dom_sid *sid)
+{
+ int i;
+ uchar raw_sid_data[12];
- return True;
+ ZERO_STRUCTP(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);
}
/****************************************************************************
- Generate the global machine sid. Look for the MACHINE.SID file first, if
- not found then look in smb.conf and use it to create the MACHINE.SID file.
- Note this function will be replaced soon. JRA.
+ Generate the global machine sid.
****************************************************************************/
-BOOL pdb_generate_sam_sid(void)
+static struct dom_sid *pdb_generate_sam_sid(void)
{
- int fd;
- char *p;
- pstring sid_file;
- fstring sid_string;
- SMB_STRUCT_STAT st;
- BOOL overwrite_bad_sid = False;
-
- generate_wellknown_sids();
-
- pstrcpy(sid_file, lp_smb_passwd_file());
- p = strrchr_m(sid_file, '/');
- if(p != NULL) {
- *++p = '\0';
- }
+ struct dom_sid domain_sid;
+ char *fname = NULL;
+ struct dom_sid *sam_sid;
- 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;
+ if(!(sam_sid=SMB_MALLOC_P(struct dom_sid)))
+ return NULL;
+
+ if ( IS_DC ) {
+ if (secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
+ sid_copy(sam_sid, &domain_sid);
+ return sam_sid;
}
}
- 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(lp_netbios_name(), sam_sid)) {
+
+ /* We got our sid. If not a pdc/bdc, we're done. */
+ if ( !IS_DC )
+ return sam_sid;
+
+ 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(), 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;
}
- /*
- * 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);
- return False;
+ if (!dom_sid_equal(&domain_sid, sam_sid)) {
+
+ /* Domain name sid doesn't match global sam sid. Re-store domain sid as 'local' sid. */
+
+ DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
+ if (!secrets_store_domain_sid(lp_netbios_name(), &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;
}
- } else {
- close(fd);
- return True;
+ return sam_sid;
}
- } 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 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);
- return False;
+
+ return sam_sid;
+ }
+
+ /* check for an old MACHINE.SID file for backwards compatibility */
+ if (asprintf(&fname, "%s/MACHINE.SID", lp_private_dir()) == -1) {
+ SAFE_FREE(sam_sid);
+ return NULL;
+ }
+
+ if (read_sid_from_file(fname, sam_sid)) {
+ /* remember it for future reference and unlink the old MACHINE.SID */
+ if (!secrets_store_domain_sid(lp_netbios_name(), 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;
}
- close(fd);
- return True;
- }
+ }
+
+ /* Stored the old sid from MACHINE.SID successfully.*/
+ SAFE_FREE(fname);
+ return sam_sid;
}
-
- /*
- * 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.
- */
+
+ SAFE_FREE(fname);
+
+ /* we don't have the SID in secrets.tdb, we will need to
+ generate one and save it */
+ generate_random_sid(sam_sid);
+
+ if (!secrets_store_domain_sid(lp_netbios_name(), 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;
+}
+
+/* return our global_sam_sid */
+struct dom_sid *get_global_sam_sid(void)
+{
+ struct db_context *db;
+
+ if (global_sam_sid != NULL)
+ return global_sam_sid;
/*
- * 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.
+ * memory for global_sam_sid is allocated in
+ * pdb_generate_sam_sid() as needed
+ *
+ * Note: this is guarded by a transaction
+ * to prevent races on startup which
+ * can happen with some dbwrap backends
*/
-
- do_file_lock( fd, 60, F_UNLCK);
- close(fd);
- return True;
-}
+ db = secrets_db_ctx();
+ if (!db) {
+ smb_panic("could not open secrets db");
+ }
+ if (dbwrap_transaction_start(db) != 0) {
+ smb_panic("could not start transaction on secrets db");
+ }
+
+ if (!(global_sam_sid = pdb_generate_sam_sid())) {
+ dbwrap_transaction_cancel(db);
+ smb_panic("could not generate a machine SID");
+ }
+
+ if (dbwrap_transaction_commit(db) != 0) {
+ smb_panic("could not start commit secrets db");
+ }
+
+ return global_sam_sid;
+}
+
+/**
+ * Force get_global_sam_sid to requery the backends
+ */
+void reset_global_sam_sid(void)
+{
+ SAFE_FREE(global_sam_sid);
+}
+
+/*****************************************************************
+ Check if the SID is our sam SID (S-1-5-21-x-y-z).
+*****************************************************************/
+
+bool sid_check_is_our_sam(const struct dom_sid *sid)
+{
+ return dom_sid_equal(sid, get_global_sam_sid());
+}
+
+/*****************************************************************
+ Check if the SID is our domain SID (S-1-5-21-x-y-z).
+*****************************************************************/
+
+bool sid_check_is_in_our_sam(const struct dom_sid *sid)
+{
+ struct dom_sid dom_sid;
+
+ sid_copy(&dom_sid, sid);
+ sid_split_rid(&dom_sid, NULL);
+ return sid_check_is_our_sam(&dom_sid);
+}
git.samba.org / bbaumbach / samba-autobuild / .git / blobdiff