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-rw-r--r--source3/lib/sids.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/source3/lib/sids.c b/source3/lib/sids.c
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--- /dev/null
+++ b/source3/lib/sids.c
@@ -0,0 +1,554 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ Samba utility functions
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ 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"
+
+
+extern int DEBUGLEVEL;
+extern pstring scope;
+extern pstring global_myname;
+
+/*
+ * This is set on startup - it defines the SID for this
+ * machine, and therefore the SAM database for which it is
+ * responsible.
+ */
+
+DOM_SID global_sam_sid;
+
+/*
+ * This is the name associated with the SAM database for
+ * which this machine is responsible. In the case of a PDC
+ * or PDC, this name is the same as the workgroup. In the
+ * case of "security = domain" mode, this is the same as
+ * the name of the server (global_myname).
+ */
+
+fstring global_sam_name;
+
+/*
+ * This is obtained on startup - it defines the SID for which
+ * this machine is a member. It is therefore only set, and
+ * used, in "security = domain" mode.
+ */
+
+DOM_SID global_member_sid;
+
+/*
+ * note the lack of a "global_member_name" - this is because
+ * this is the same as "global_myworkgroup".
+ */
+
+extern fstring global_myworkgroup;
+/* fstring global_member_dom_name; */
+
+/*
+ * some useful sids
+ */
+
+DOM_SID global_sid_S_1_5_20; /* local well-known domain */
+DOM_SID global_sid_S_1_1; /* everyone */
+DOM_SID global_sid_S_1_3; /* Creator Owner */
+DOM_SID global_sid_S_1_5; /* NT Authority */
+
+static struct sid_name_map_info
+{
+ DOM_SID *sid;
+ char *name;
+
+}
+sid_name_map[] =
+{
+ { &global_sid_S_1_5_20, "BUILTIN" },
+ { &global_sid_S_1_1 , "Everyone" },
+ { &global_sid_S_1_3 , "Creator Owner" },
+ { &global_sid_S_1_5 , "NT Authority" },
+ { &global_sam_sid , global_sam_name },
+ { &global_member_sid , global_myworkgroup },
+ { NULL , NULL }
+};
+
+/****************************************************************************
+ Read the machine SID from a file.
+****************************************************************************/
+
+static BOOL read_sid_from_file(int fd, char *sid_file)
+{
+ fstring fline;
+ fstring sid_str;
+
+ memset(fline, '\0', sizeof(fline));
+
+ 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;
+ }
+
+ /*
+ * Convert to the machine SID.
+ */
+
+ fline[sizeof(fline)-1] = '\0';
+ if (!string_to_sid( &global_sam_sid, fline)) {
+ DEBUG(0,("unable to generate machine SID.\n"));
+ return False;
+ }
+
+ sid_to_string(sid_str, &global_sam_sid);
+ DEBUG(5,("read_sid_from_file: sid %s\n", sid_str));
+
+ return True;
+}
+
+/****************************************************************************
+ sets up the name associated with the SAM database for which we are responsible
+****************************************************************************/
+void get_sam_domain_name(void)
+{
+ switch (lp_server_role())
+ {
+ case ROLE_DOMAIN_PDC:
+ case ROLE_DOMAIN_BDC:
+ {
+ /* we are PDC (or BDC) for a Domain */
+ fstrcpy(global_sam_name, lp_workgroup());
+ break;
+ }
+ case ROLE_DOMAIN_MEMBER:
+ {
+ /* we are a "PDC", but FOR LOCAL SAM DATABASE ONLY */
+ fstrcpy(global_sam_name, global_myname);
+ break;
+ }
+ default:
+ {
+ /* no domain role, probably due to "security = share" */
+ memset(global_sam_name, 0, sizeof(global_sam_name));
+ break;
+ }
+ }
+}
+
+/****************************************************************************
+ obtain the sid from the PDC. do some verification along the way...
+****************************************************************************/
+BOOL get_member_domain_sid(void)
+{
+ POLICY_HND pol;
+ fstring srv_name;
+ struct cli_state cli;
+ BOOL res = True;
+ DOM_SID sid3;
+ DOM_SID sid5;
+ fstring dom3;
+ fstring dom5;
+
+ switch (lp_server_role())
+ {
+ case ROLE_DOMAIN_NONE:
+ {
+ ZERO_STRUCT(global_member_sid);
+ return True;
+ }
+ case ROLE_DOMAIN_PDC:
+ {
+ sid_copy(&global_member_sid, &global_sam_sid);
+ return True;
+ }
+ default:
+ {
+ /* member or BDC, we're going for connection to PDC */
+ break;
+ }
+ }
+
+ if (!cli_connect_serverlist(&cli, lp_passwordserver()))
+ {
+ DEBUG(0,("get_member_domain_sid: unable to initialise client connection.\n"));
+ return False;
+ }
+
+ /*
+ * Ok - we have an anonymous connection to the IPC$ share.
+ * Now start the NT Domain stuff :-).
+ */
+
+ fstrcpy(dom3, "");
+ fstrcpy(dom5, "");
+ ZERO_STRUCT(sid3);
+ ZERO_STRUCT(sid5);
+
+ fstrcpy(srv_name, "\\\\");
+ fstrcat(srv_name, global_myname);
+ strupper(srv_name);
+
+ /* open LSARPC session. */
+ res = res ? cli_nt_session_open(&cli, PIPE_LSARPC) : False;
+
+ /* lookup domain controller; receive a policy handle */
+ res = res ? do_lsa_open_policy(&cli, srv_name, &pol, False) : False;
+
+ /* send client info query, level 3. receive domain name and sid */
+ res = res ? do_lsa_query_info_pol(&cli, &pol, 3, dom3, &sid3) : False;
+
+ /* send client info query, level 5. receive domain name and sid */
+ res = res ? do_lsa_query_info_pol(&cli, &pol, 5, dom5, &sid5) : False;
+
+ /* close policy handle */
+ res = res ? do_lsa_close(&cli, &pol) : False;
+
+ /* close the session */
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+
+ if (res)
+ {
+ pstring sid;
+ DEBUG(2,("LSA Query Info Policy\n"));
+ sid_to_string(sid, &sid3);
+ DEBUG(2,("Domain Member - Domain: %s SID: %s\n", dom3, sid));
+ sid_to_string(sid, &sid5);
+ DEBUG(2,("Domain Controller - Domain: %s SID: %s\n", dom5, sid));
+
+ if (!strequal(dom3, global_myworkgroup) ||
+ !strequal(dom5, global_myworkgroup))
+ {
+ DEBUG(0,("get_member_domain_sid: %s is a DC for %s not %s\n",
+ cli.desthost, dom5, global_myworkgroup));
+ res = False;
+ }
+ }
+ else
+ {
+ DEBUG(1,("lsa query info failed\n"));
+ }
+
+ if (!res)
+ {
+ DEBUG(0,("get_member_domain_sid: unable to obtain Domain member SID\n"));
+ }
+ else
+ {
+ /* this is a _lot_ of trouble to go to for just this info: */
+ global_member_sid = sid5;
+ }
+
+ return res;
+}
+
+/****************************************************************************
+ creates some useful well known sids
+****************************************************************************/
+void generate_wellknown_sids(void)
+{
+ string_to_sid(&global_sid_S_1_5_20, "S-1-5-32");
+ string_to_sid(&global_sid_S_1_1 , "S-1-1" );
+ string_to_sid(&global_sid_S_1_3 , "S-1-3" );
+ string_to_sid(&global_sid_S_1_5 , "S-1-5" );
+}
+
+/****************************************************************************
+ 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.
+****************************************************************************/
+BOOL generate_sam_sid(void)
+{
+ int fd;
+ int i;
+ char *p;
+ pstring sid_file;
+ fstring sid_string;
+ SMB_STRUCT_STAT st;
+ uchar raw_sid_data[12];
+
+ pstrcpy(sid_file, lp_smb_passwd_file());
+ p = strrchr(sid_file, '/');
+ if (p != NULL) {
+ *++p = '\0';
+ }
+
+ if (!directory_exist(sid_file, NULL)) {
+ if (dos_mkdir(sid_file, 0700) != 0) {
+ DEBUG(0,("can't create private directory %s : %s\n",
+ sid_file, strerror(errno)));
+ return False;
+ }
+ }
+
+ 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;
+ }
+ close(fd);
+ return True;
+ }
+
+ /*
+ * Generate the new sid data & turn it into a string.
+ */
+ generate_random_buffer( raw_sid_data, 12, True);
+
+ fstrcpy( sid_string, "S-1-5-21");
+ for( i = 0; i < 3; i++) {
+ fstring tmp_string;
+ slprintf( tmp_string, sizeof(tmp_string) - 1, "-%u", IVAL(raw_sid_data, i*4));
+ fstrcat( sid_string, tmp_string);
+ }
+
+ 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;
+ }
+
+ /*
+ * 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;
+ }
+ close(fd);
+ return True;
+ }
+
+ /*
+ * The file is still empty and we have an exlusive lock on it.
+ * Write out out SID data into the file.
+ */
+
+ if (fchmod(fd, 0644) < 0) {
+ DEBUG(0,("unable to set correct permissions on file %s. \
+Error was %s\n", sid_file, strerror(errno) ));
+ 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) ));
+ close(fd);
+ return False;
+ }
+
+ /*
+ * Unlock & exit.
+ */
+
+ do_file_lock( fd, 60, F_UNLCK);
+ close(fd);
+ return True;
+}
+
+/**************************************************************************
+ turns a domain name into a SID.
+
+ *** side-effect: if the domain name is NULL, it is set to our domain ***
+
+***************************************************************************/
+BOOL map_domain_name_to_sid(DOM_SID *sid, char **nt_domain)
+{
+ int i = 0;
+
+ if (nt_domain == NULL)
+ {
+ sid_copy(sid, &global_sam_sid);
+ return True;
+ }
+
+ if ((*nt_domain) == NULL)
+ {
+ DEBUG(5,("map_domain_name_to_sid: overriding NULL name to %s\n",
+ global_sam_name));
+ (*nt_domain) = strdup(global_sam_name);
+ sid_copy(sid, &global_sam_sid);
+ return True;
+ }
+
+ if ((*nt_domain)[0] == 0)
+ {
+ DEBUG(5,("map_domain_name_to_sid: overriding blank name to %s\n",
+ global_sam_name));
+ free(*nt_domain);
+ (*nt_domain) = strdup(global_sam_name);
+ sid_copy(sid, &global_sam_sid);
+ return True;
+ }
+
+ DEBUG(5,("map_domain_name_to_sid: %s\n", (*nt_domain)));
+
+ while (sid_name_map[i].name != NULL)
+ {
+ DEBUG(5,("compare: %s\n", sid_name_map[i].name));
+ if (strequal(sid_name_map[i].name, (*nt_domain)))
+ {
+ fstring sid_str;
+ sid_copy(sid, sid_name_map[i].sid);
+ sid_to_string(sid_str, sid_name_map[i].sid);
+ DEBUG(5,("found %s\n", sid_str));
+ return True;
+ }
+ i++;
+ }
+
+ DEBUG(0,("map_domain_name_to_sid: mapping to %s NOT IMPLEMENTED\n",
+ (*nt_domain)));
+ return False;
+}
+
+/**************************************************************************
+ turns a domain SID into a name.
+
+***************************************************************************/
+BOOL map_domain_sid_to_name(DOM_SID *sid, char *nt_domain)
+{
+ fstring sid_str;
+ int i = 0;
+ sid_to_string(sid_str, sid);
+
+ DEBUG(5,("map_domain_sid_to_name: %s\n", sid_str));
+
+ if (nt_domain == NULL)
+ {
+ return False;
+ }
+
+ while (sid_name_map[i].sid != NULL)
+ {
+ sid_to_string(sid_str, sid_name_map[i].sid);
+ DEBUG(5,("compare: %s\n", sid_str));
+ if (sid_equal(sid_name_map[i].sid, sid))
+ {
+ fstrcpy(nt_domain, sid_name_map[i].name);
+ DEBUG(5,("found %s\n", nt_domain));
+ return True;
+ }
+ i++;
+ }
+
+ DEBUG(0,("map_domain_sid_to_name: mapping NOT IMPLEMENTED\n"));
+
+ return False;
+}
+
+/**************************************************************************
+ splits a name of format \DOMAIN\name into its two components.
+ sets the DOMAIN name to global_sam_name if it has not been specified.
+***************************************************************************/
+BOOL split_domain_name(char *fullname, char *domain, char *name)
+{
+ fstring full_name;
+ char *p;
+
+ if (fullname == NULL || domain == NULL || name == NULL)
+ {
+ return False;
+ }
+
+ if (fullname[0] == '\\')
+ {
+ fullname++;
+ }
+ fstrcpy(full_name, fullname);
+ p = strchr(full_name+1, '\\');
+
+ if (p != NULL)
+ {
+ *p = 0;
+ fstrcpy(domain, full_name);
+ fstrcpy(name, p+1);
+ }
+ else
+ {
+ fstrcpy(domain, global_sam_name);
+ fstrcpy(name, full_name);
+ }
+
+ DEBUG(5,("name '%s' split into '%s\\%s'\n", fullname, domain, name));
+ return True;
+}
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