2 Unix SMB/Netbios implementation.
4 Password and authentication handling
5 Copyright (C) Andrew Tridgell 1992-1998
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
25 #include "rpcsvc/ypclnt.h"
28 extern int DEBUGLEVEL;
31 BOOL global_machine_pasword_needs_changing;
33 /* users from session setup */
34 static pstring session_users="";
36 extern pstring global_myname;
37 extern fstring global_myworkgroup;
39 /* Data to do lanman1/2 password challenge. */
40 static unsigned char saved_challenge[8];
41 static BOOL challenge_sent=False;
43 /*******************************************************************
44 Get the next challenge value - no repeats.
45 ********************************************************************/
46 void generate_next_challenge(char *challenge)
50 * Leave this ifdef'd out while we test
51 * the new crypto random number generator.
54 unsigned char buf[16];
55 static int counter = 0;
59 /* get a sort-of random number */
61 v1 = (counter++) + getpid() + tval.tv_sec;
62 v2 = (counter++) * getpid() + tval.tv_usec;
63 SIVAL(challenge,0,v1);
64 SIVAL(challenge,4,v2);
66 /* mash it up with md4 */
67 mdfour(buf, (unsigned char *)challenge, 8);
71 generate_random_buffer(buf,8,False);
73 memcpy(saved_challenge, buf, 8);
74 memcpy(challenge,buf,8);
75 challenge_sent = True;
78 /*******************************************************************
79 set the last challenge sent, usually from a password server
80 ********************************************************************/
81 BOOL set_challenge(char *challenge)
83 memcpy(saved_challenge,challenge,8);
84 challenge_sent = True;
88 /*******************************************************************
89 get the last challenge sent
90 ********************************************************************/
91 BOOL last_challenge(unsigned char *challenge)
93 if (!challenge_sent) return(False);
94 memcpy(challenge,saved_challenge,8);
98 /* this holds info on user ids that are already validated for this VC */
99 static user_struct *validated_users = NULL;
100 static int num_validated_users = 0;
102 /****************************************************************************
103 check if a uid has been validated, and return an pointer to the user_struct
104 if it has. NULL if not. vuid is biased by an offset. This allows us to
105 tell random client vuid's (normally zero) from valid vuids.
106 ****************************************************************************/
107 user_struct *get_valid_user_struct(uint16 vuid)
109 if (vuid == UID_FIELD_INVALID)
112 if ((vuid >= (uint16)num_validated_users) ||
113 (validated_users[vuid].uid == -1) || (validated_users[vuid].gid == -1))
115 return &validated_users[vuid];
118 /****************************************************************************
120 ****************************************************************************/
121 void invalidate_vuid(uint16 vuid)
123 user_struct *vuser = get_valid_user_struct(vuid);
125 if (vuser == NULL) return;
132 /* same number of igroups as groups */
135 if (vuser->groups) free(vuser->groups);
137 if (vuser->sids) free(vuser->sids);
140 vuser->groups = NULL;
144 /****************************************************************************
145 return a validated username
146 ****************************************************************************/
147 char *validated_username(uint16 vuid)
149 user_struct *vuser = get_valid_user_struct(vuid);
156 /****************************************************************************
157 Setup the groups a user belongs to.
158 ****************************************************************************/
159 int setup_groups(char *user, int uid, int gid, int *p_ngroups, GID_T **p_groups)
165 if (-1 == initgroups(user,gid)) {
167 DEBUG(0,("Unable to initgroups!\n"));
168 if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000) {
169 DEBUG(0,("This is probably a problem with the account %s\n",
176 ngroups = getgroups(0,&grp);
177 if (ngroups <= 0) ngroups = 32;
179 groups = (GID_T *)malloc(sizeof(groups[0])*ngroups);
181 ngroups = getgroups(ngroups,(gid_t *)groups);
183 (*p_ngroups) = ngroups;
185 (*p_groups) = groups;
187 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
188 for (i = 0; i < ngroups; i++ ) {
189 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
191 DEBUG( 3, ( "\n" ) );
197 /****************************************************************************
198 register a uid/name pair as being valid and that a valid password
199 has been given. vuid is biased by an offset. This allows us to
200 tell random client vuid's (normally zero) from valid vuids.
201 ****************************************************************************/
202 uint16 register_vuid(int uid,int gid, char *unix_name, char *requested_name, BOOL guest)
205 struct passwd *pwfile; /* for getting real name from passwd file */
207 /* Ensure no vuid gets registered in share level security. */
208 if(lp_security() == SEC_SHARE)
209 return UID_FIELD_INVALID;
213 * After observing MS-Exchange services writing to a Samba share
214 * I belive this code is incorrect. Each service does its own
215 * sessionsetup_and_X for the same user, and as each service shuts
216 * down, it does a user_logoff_and_X. As we are consolidating multiple
217 * sessionsetup_and_X's onto the same vuid here, when the first service
218 * shuts down, it invalidates all the open files for the other services.
219 * Hence I am removing this code and forcing each sessionsetup_and_X
221 * Jeremy Allison. (jallison@whistle.com).
225 for(i = 0; i < num_validated_users; i++) {
226 vuser = &validated_users[i];
227 if ( vuser->uid == uid )
228 return (uint16)(i + VUID_OFFSET); /* User already validated */
232 validated_users = (user_struct *)Realloc(validated_users,
234 (num_validated_users+1));
236 if (!validated_users)
238 DEBUG(0,("Failed to realloc users struct!\n"));
239 num_validated_users = 0;
240 return UID_FIELD_INVALID;
243 vuser = &validated_users[num_validated_users];
244 num_validated_users++;
248 vuser->guest = guest;
249 fstrcpy(vuser->name,unix_name);
250 fstrcpy(vuser->requested_name,requested_name);
256 vuser->groups = NULL;
258 /* Find all the groups this uid is in and store them.
259 Used by become_user() */
260 setup_groups(unix_name,uid,gid,
264 DEBUG(3,("uid %d registered to name %s\n",uid,unix_name));
266 DEBUG(3, ("Clearing default real name\n"));
267 fstrcpy(vuser->real_name, "<Full Name>\0");
268 if (lp_unix_realname()) {
269 if ((pwfile=getpwnam(vuser->name))!= NULL)
271 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
272 fstrcpy(vuser->real_name, pwfile->pw_gecos);
276 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
280 /****************************************************************************
281 add a name to the session users list
282 ****************************************************************************/
283 void add_session_user(char *user)
286 StrnCpy(suser,user,sizeof(suser)-1);
288 if (!Get_Pwnam(suser,True)) return;
290 if (suser && *suser && !in_list(suser,session_users,False))
292 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
293 DEBUG(1,("Too many session users??\n"));
296 pstrcat(session_users," ");
297 pstrcat(session_users,suser);
303 /****************************************************************************
304 update the encrypted smbpasswd file from the plaintext username and password
305 *****************************************************************************/
306 BOOL update_smbpassword_file(char *user, char *password)
308 struct smb_passwd *smbpw;
312 smbpw = getsmbpwnam(user);
316 DEBUG(0,("getsmbpwnam returned NULL\n"));
320 /* Here, the flag is one, because we want to ignore the
321 XXXXXXX'd out password */
322 ret = change_oem_password( smbpw, password, True);
324 DEBUG(3,("change_oem_password returned False\n"));
334 /****************************************************************************
335 core of smb password checking routine.
336 ****************************************************************************/
337 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
339 /* Finish the encryption of part_passwd. */
340 unsigned char p21[21];
341 unsigned char p24[24];
343 if (part_passwd == NULL)
344 DEBUG(10,("No password set - allowing access\n"));
345 /* No password set - always true ! */
346 if (part_passwd == NULL)
350 memcpy(p21,part_passwd,16);
355 DEBUG(100,("Part password (P16) was |"));
356 for(i = 0; i < 16; i++)
357 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
359 DEBUG(100,("Password from client was |"));
360 for(i = 0; i < 24; i++)
361 DEBUG(100,("%X ", (unsigned char)password[i]));
363 DEBUG(100,("Given challenge was |"));
364 for(i = 0; i < 8; i++)
365 DEBUG(100,("%X ", (unsigned char)c8[i]));
367 DEBUG(100,("Value from encryption was |"));
368 for(i = 0; i < 24; i++)
369 DEBUG(100,("%X ", (unsigned char)p24[i]));
373 return (memcmp(p24, password, 24) == 0);
376 /****************************************************************************
377 Do a specific test for an smb password being correct, given a smb_password and
378 the lanman and NT responses.
379 ****************************************************************************/
380 BOOL smb_password_ok(struct smb_passwd *smb_pass,
381 uchar lm_pass[24], uchar nt_pass[24])
385 if (!lm_pass || !smb_pass) return(False);
387 if(smb_pass->acct_ctrl & ACB_DISABLED) {
388 DEBUG(3,("account for user %s was disabled.\n",
389 smb_pass->smb_name));
393 if (!last_challenge(challenge)) {
394 DEBUG(1,("no challenge done - password failed\n"));
398 DEBUG(4,("Checking SMB password for user %s\n",
399 smb_pass->smb_name));
401 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
402 /* We have the NT MD4 hash challenge available - see if we can
403 use it (ie. does it exist in the smbpasswd file).
405 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
406 if (smb_password_check((char *)nt_pass,
407 (uchar *)smb_pass->smb_nt_passwd,
409 DEBUG(4,("NT MD4 password check succeeded\n"));
412 DEBUG(4,("NT MD4 password check failed\n"));
415 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
416 no password, allow access. */
418 DEBUG(4,("Checking LM MD4 password\n"));
420 if((smb_pass->smb_passwd == NULL) &&
421 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
422 DEBUG(4,("no password required for user %s\n",
423 smb_pass->smb_name));
427 if((smb_pass->smb_passwd != NULL) &&
428 smb_password_check((char *)lm_pass,
429 (uchar *)smb_pass->smb_passwd, challenge)) {
430 DEBUG(4,("LM MD4 password check succeeded\n"));
434 DEBUG(4,("LM MD4 password check failed\n"));
440 /****************************************************************************
441 check if a username/password is OK assuming the password is a 24 byte
443 return True if the password is correct, False otherwise
444 ****************************************************************************/
445 static BOOL pass_check_smb(char *user,char *password, struct passwd *pwd)
449 struct smb_passwd *smb_pass;
456 challenge_done = last_challenge(challenge);
458 if (!challenge_done) {
459 DEBUG(0,("Error: challenge not done for user=%s\n", user));
464 pass = (struct passwd *) pwd;
465 user = pass->pw_name;
467 pass = Get_Pwnam(user,True);
471 DEBUG(3,("Couldn't find user %s\n",user));
475 smb_pass = getsmbpwnam(user);
478 DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
482 /* Quit if the account was disabled. */
483 if(smb_pass->acct_ctrl & ACB_DISABLED) {
484 DEBUG(3,("account for user %s was disabled.\n", user));
488 /* Ensure the uid's match */
489 if (smb_pass->smb_userid != pass->pw_uid) {
490 DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
494 if (smb_password_ok(smb_pass,
495 (unsigned char *)password,
496 (uchar *)password)) {
500 DEBUG(3,("Error smb_password_check failed\n"));
504 /****************************************************************************
505 check if a username/password pair is OK either via the system password
506 database or the encrypted SMB password database
507 return True if the password is correct, False otherwise
508 ****************************************************************************/
509 BOOL password_ok(char *user,char *password, int pwlen, struct passwd *pwd)
512 /* if it is 24 bytes long then assume it is an encrypted
514 return pass_check_smb(user, password, pwd);
517 return pass_check(user, password, pwlen, pwd,
518 lp_update_encrypted() ?
519 update_smbpassword_file : NULL);
522 /****************************************************************************
523 check if a username is valid
524 ****************************************************************************/
525 BOOL user_ok(char *user,int snum)
527 pstring valid, invalid;
530 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
531 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
533 string_sub(valid,"%S",lp_servicename(snum));
534 string_sub(invalid,"%S",lp_servicename(snum));
536 ret = !user_in_list(user,invalid);
538 if (ret && valid && *valid) {
539 ret = user_in_list(user,valid);
542 if (ret && lp_onlyuser(snum)) {
543 char *user_list = lp_username(snum);
544 string_sub(user_list,"%S",lp_servicename(snum));
545 ret = user_in_list(user,user_list);
554 /****************************************************************************
555 validate a group username entry. Return the username or NULL
556 ****************************************************************************/
557 static char *validate_group(char *group,char *password,int pwlen,int snum)
561 char *host, *user, *domain;
563 while (getnetgrent(&host, &user, &domain)) {
565 if (user_ok(user, snum) &&
566 password_ok(user,password,pwlen,NULL)) {
578 struct group *gptr = (struct group *)getgrnam(group);
582 member = gptr->gr_mem;
583 while (member && *member)
586 fstrcpy(name,*member);
587 if (user_ok(name,snum) &&
588 password_ok(name,password,pwlen,NULL))
592 #ifdef GROUP_CHECK_PWENT
598 while (pwd = getpwent ()) {
599 if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
600 /* This Entry have PASSWORD and same GID then check pwd */
601 if (password_ok(NULL, password, pwlen, pwd)) {
602 fstrcpy(tm, pwd->pw_name);
610 #endif /* GROUP_CHECK_PWENT */
619 /****************************************************************************
620 check for authority to login to a service with a given username/password
621 ****************************************************************************/
622 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
623 BOOL *guest,BOOL *force,uint16 vuid)
630 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
633 /* there are several possibilities:
634 1) login as the given user with given password
635 2) login as a previously registered username with the given password
636 3) login as a session list username with the given password
637 4) login as a previously validated user/password pair
638 5) login as the "user =" user with given password
639 6) login as the "user =" user with no password (guest connection)
640 7) login as guest user with no password
642 if the service is guest_only then steps 1 to 5 are skipped
645 if (GUEST_ONLY(snum)) *force = True;
647 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
650 user_struct *vuser = get_valid_user_struct(vuid);
652 /* check the given username and password */
653 if (!ok && (*user) && user_ok(user,snum)) {
654 ok = password_ok(user,password, pwlen, NULL);
655 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
658 /* check for a previously registered guest username */
659 if (!ok && (vuser != 0) && vuser->guest) {
660 if (user_ok(vuser->name,snum) &&
661 password_ok(vuser->name, password, pwlen, NULL)) {
662 fstrcpy(user, vuser->name);
663 vuser->guest = False;
664 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
670 /* now check the list of session users */
674 char *user_list = strdup(session_users);
675 if (!user_list) return(False);
677 for (auser=strtok(user_list,LIST_SEP);
679 auser = strtok(NULL,LIST_SEP))
682 fstrcpy(user2,auser);
683 if (!user_ok(user2,snum)) continue;
685 if (password_ok(user2,password, pwlen, NULL)) {
688 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
694 /* check for a previously validated username/password pair */
695 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
696 (vuser != 0) && !vuser->guest &&
697 user_ok(vuser->name,snum)) {
698 fstrcpy(user,vuser->name);
700 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
704 /* check for a rhosts entry */
705 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
707 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
710 /* check the user= fields and the given password */
711 if (!ok && lp_username(snum)) {
714 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
716 string_sub(user_list,"%S",lp_servicename(snum));
718 for (auser=strtok(user_list,LIST_SEP);
720 auser = strtok(NULL,LIST_SEP))
724 auser = validate_group(auser+1,password,pwlen,snum);
729 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
735 fstrcpy(user2,auser);
736 if (user_ok(user2,snum) &&
737 password_ok(user2,password,pwlen,NULL))
741 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
746 } /* not guest only */
748 /* check for a normal guest connection */
749 if (!ok && GUEST_OK(snum))
752 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
753 if (Get_Pwnam(guestname,True))
755 fstrcpy(user,guestname);
757 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
760 DEBUG(0,("Invalid guest account %s??\n",guestname));
765 if (ok && !user_ok(user,snum))
767 DEBUG(0,("rejected invalid user %s\n",user));
775 /****************************************************************************
776 read the a hosts.equiv or .rhosts file and check if it
777 allows this user from this machine
778 ****************************************************************************/
779 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
782 int plus_allowed = 1;
785 FILE *fp = fopen(equiv_file, "r");
786 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
787 if (! fp) return False;
788 while(fgets(buf, sizeof(buf), fp))
790 trim_string(buf," "," ");
792 if (buf[0] != '#' && buf[0] != '\n')
794 BOOL is_group = False;
797 if (strcmp(buf, "NO_PLUS\n") == 0)
799 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
806 if (*bp == '\n' && plus_allowed)
808 /* a bare plus means everbody allowed */
809 DEBUG(6, ("check_user_equiv everybody allowed\n"));
814 else if (buf[0] == '-')
824 file_host = strtok(bp, " \t\n");
825 file_user = strtok(NULL, " \t\n");
826 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
827 file_user ? file_user : "(null)" ));
828 if (file_host && *file_host)
830 BOOL host_ok = False;
832 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
835 static char *mydomain = NULL;
837 yp_get_default_domain(&mydomain);
838 if (mydomain && innetgr(file_host,remote,user,mydomain))
844 DEBUG(1,("Netgroups not configured\n"));
849 /* is it this host */
850 /* the fact that remote has come from a call of gethostbyaddr
851 * means that it may have the fully qualified domain name
852 * so we could look up the file version to get it into
853 * a canonical form, but I would rather just type it
854 * in full in the equiv file
856 if (!host_ok && !is_group && strequal(remote, file_host))
862 /* is it this user */
863 if (file_user == 0 || strequal(user, file_user))
866 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
867 (plus ? "+" : "-"), file_host,
868 (file_user ? file_user : "")));
869 return (plus ? True : False);
880 /****************************************************************************
881 check for a possible hosts equiv or rhosts entry for the user
882 ****************************************************************************/
883 BOOL check_hosts_equiv(char *user)
887 struct passwd *pass = Get_Pwnam(user,True);
892 fname = lp_hosts_equiv();
894 /* note: don't allow hosts.equiv on root */
895 if (fname && *fname && (pass->pw_uid != 0)) {
897 if (check_user_equiv(user,client_name(Client),fname))
903 char *home = get_home_dir(user);
906 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
907 if (check_user_equiv(user,client_name(Client),rhostsfile))
916 static struct cli_state pw_cli;
918 /****************************************************************************
919 return the client state structure
920 ****************************************************************************/
921 struct cli_state *server_client(void)
926 /****************************************************************************
927 support for server level security
928 ****************************************************************************/
929 struct cli_state *server_cryptkey(void)
932 struct in_addr dest_ip;
933 extern fstring local_machine;
935 BOOL connected_ok = False;
937 if (!cli_initialise(&pw_cli))
940 p = lp_passwordserver();
941 while(p && next_token( &p, desthost, LIST_SEP)) {
942 standard_sub_basic(desthost);
945 if(!resolve_name( desthost, &dest_ip)) {
946 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
950 if (ismyip(dest_ip)) {
951 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
955 if (cli_connect(&pw_cli, desthost, &dest_ip)) {
956 DEBUG(3,("connected to password server %s\n",desthost));
963 DEBUG(0,("password server not available\n"));
964 cli_shutdown(&pw_cli);
968 if (!cli_session_request(&pw_cli, desthost, 0x20, local_machine)) {
969 DEBUG(1,("%s rejected the session\n",desthost));
970 cli_shutdown(&pw_cli);
974 DEBUG(3,("got session\n"));
976 if (!cli_negprot(&pw_cli)) {
977 DEBUG(1,("%s rejected the negprot\n",desthost));
978 cli_shutdown(&pw_cli);
982 if (pw_cli.protocol < PROTOCOL_LANMAN2 ||
983 !(pw_cli.sec_mode & 1)) {
984 DEBUG(1,("%s isn't in user level security mode\n",desthost));
985 cli_shutdown(&pw_cli);
989 DEBUG(3,("password server OK\n"));
994 /****************************************************************************
995 validate a password with the password server
996 ****************************************************************************/
997 BOOL server_validate(char *user, char *domain,
998 char *pass, int passlen,
999 char *ntpass, int ntpasslen)
1001 extern fstring local_machine;
1002 static unsigned char badpass[24];
1004 if (!pw_cli.initialised) {
1005 DEBUG(1,("password server %s is not connected\n", pw_cli.desthost));
1009 if(badpass[0] == 0) {
1010 memset(badpass, 0x1f, sizeof(badpass));
1013 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1014 /* Very unlikely, our random bad password is the same as the users
1016 memset(badpass, badpass[0]+1, sizeof(badpass));
1020 * Attempt a session setup with a totally incorrect password.
1021 * If this succeeds with the guest bit *NOT* set then the password
1022 * server is broken and is not correctly setting the guest bit. We
1023 * need to detect this as some versions of NT4.x are broken. JRA.
1026 if (cli_session_setup(&pw_cli, user, (char *)badpass, sizeof(badpass),
1027 (char *)badpass, sizeof(badpass), domain)) {
1028 if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) == 0) {
1029 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1030 with a bad password.\n", pw_cli.desthost));
1031 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1032 use this machine as the password server.\n"));
1033 cli_ulogoff(&pw_cli);
1036 cli_ulogoff(&pw_cli);
1040 * Now we know the password server will correctly set the guest bit, or is
1041 * not guest enabled, we can try with the real password.
1044 if (!cli_session_setup(&pw_cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1045 DEBUG(1,("password server %s rejected the password\n", pw_cli.desthost));
1049 /* if logged in as guest then reject */
1050 if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) != 0) {
1051 DEBUG(1,("password server %s gave us guest only\n", pw_cli.desthost));
1052 cli_ulogoff(&pw_cli);
1057 * This patch from Rob Nielsen <ran@adc.com> makes doing
1058 * the NetWksaUserLogon a dynamic, rather than compile-time
1059 * parameter, defaulting to on. This is somewhat dangerous
1060 * as it allows people to turn off this neccessary check,
1061 * but so many people have had problems with this that I
1062 * think it is a neccessary change. JRA.
1065 if (lp_net_wksta_user_logon()) {
1066 DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
1068 if (!cli_send_tconX(&pw_cli, "IPC$", "IPC", "", 1)) {
1069 DEBUG(0,("password server %s refused IPC$ connect\n", pw_cli.desthost));
1070 cli_ulogoff(&pw_cli);
1074 if (!cli_NetWkstaUserLogon(&pw_cli,user,local_machine)) {
1075 DEBUG(0,("password server %s failed NetWkstaUserLogon\n", pw_cli.desthost));
1077 cli_ulogoff(&pw_cli);
1081 if (pw_cli.privilages == 0) {
1082 DEBUG(0,("password server %s gave guest privilages\n", pw_cli.desthost));
1084 cli_ulogoff(&pw_cli);
1088 if (!strequal(pw_cli.eff_name, user)) {
1089 DEBUG(0,("password server %s gave different username %s\n",
1093 cli_ulogoff(&pw_cli);
1099 DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
1102 DEBUG(3,("password server %s accepted the password\n", pw_cli.desthost));
1104 cli_ulogoff(&pw_cli);
1109 /***********************************************************************
1110 Do the same as security=server, but using NT Domain calls and a session
1111 key from the machine password.
1112 ************************************************************************/
1114 BOOL domain_client_validate( char *user, char *domain,
1115 char *smb_apasswd, int smb_apasslen,
1116 char *smb_ntpasswd, int smb_ntpasslen)
1118 unsigned char local_challenge[8];
1119 unsigned char local_lm_response[24];
1120 unsigned char local_nt_reponse[24];
1121 unsigned char trust_passwd[16];
1123 fstring remote_machine;
1125 struct in_addr dest_ip;
1126 NET_ID_INFO_CTR ctr;
1127 NET_USER_INFO_3 info3;
1128 struct cli_state cli;
1130 BOOL connected_ok = False;
1133 * Check that the requested domain is not our own machine name.
1134 * If it is, we should never check the PDC here, we use our own local
1138 if(strequal( domain, global_myname)) {
1139 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1144 * Next, check that the passwords given were encrypted.
1147 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1148 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1151 * Not encrypted - do so.
1154 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1155 generate_random_buffer( local_challenge, 8, False);
1156 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1157 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1160 smb_apasswd = (char *)local_lm_response;
1161 smb_ntpasswd = (char *)local_nt_reponse;
1165 * Encrypted - get the challenge we sent for these
1169 if (!last_challenge(local_challenge)) {
1170 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1176 * Get the machine account password.
1178 if(!trust_password_lock( global_myworkgroup, global_myname, False)) {
1179 DEBUG(0,("domain_client_validate: unable to open the machine account password file for \
1180 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1184 if(get_trust_account_password( trust_passwd, &lct) == False) {
1185 DEBUG(0,("domain_client_validate: unable to read the machine account password for \
1186 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1187 trust_password_unlock();
1191 trust_password_unlock();
1194 * Here we check the last change time to see if the machine
1195 * password needs changing. JRA.
1198 if(time(NULL) > lct + lp_machine_password_timeout())
1199 global_machine_pasword_needs_changing = True;
1202 * At this point, smb_apasswd points to the lanman response to
1203 * the challenge in local_challenge, and smb_ntpasswd points to
1204 * the NT response to the challenge in local_challenge. Ship
1205 * these over the secure channel to a domain controller and
1206 * see if they were valid.
1209 memset(&cli, '\0', sizeof(struct cli_state));
1210 if(cli_initialise(&cli) == False) {
1211 DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
1216 * Treat each name in the 'password server =' line as a potential
1217 * PDC/BDC. Contact each in turn and try and authenticate.
1220 p = lp_passwordserver();
1221 while(p && next_token( &p, remote_machine, LIST_SEP)) {
1223 standard_sub_basic(remote_machine);
1224 strupper(remote_machine);
1226 if(!resolve_name( remote_machine, &dest_ip)) {
1227 DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
1231 if (ismyip(dest_ip)) {
1232 DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
1236 if (!cli_connect(&cli, remote_machine, &dest_ip)) {
1237 DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
1238 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1242 if (!cli_session_request(&cli, remote_machine, 0x20, global_myname)) {
1243 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1244 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1249 cli.protocol = PROTOCOL_NT1;
1251 if (!cli_negprot(&cli)) {
1252 DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
1253 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1258 if (cli.protocol != PROTOCOL_NT1) {
1259 DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
1266 * Do an anonymous session setup.
1269 if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
1270 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1271 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1276 if (!(cli.sec_mode & 1)) {
1277 DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
1283 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
1284 DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
1285 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1291 * We have an anonymous connection to IPC$.
1293 connected_ok = True;
1297 if (!connected_ok) {
1298 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1304 * Ok - we have an anonymous connection to the IPC$ share.
1305 * Now start the NT Domain stuff :-).
1308 if(cli_nt_session_open(&cli, PIPE_NETLOGON, False) == False) {
1309 DEBUG(0,("domain_client_validate: unable to open the domain client session to \
1310 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1311 cli_nt_session_close(&cli);
1317 if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
1318 DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
1319 %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1320 cli_nt_session_close(&cli);
1326 /* We really don't care what LUID we give the user. */
1327 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1329 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1330 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1331 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1332 &ctr, &info3) == False) {
1333 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1334 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1335 cli_nt_session_close(&cli);
1342 * Here, if we really want it, we have lots of info about the user in info3.
1347 * We don't actually need to do this - plus it fails currently with
1348 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1352 if(cli_nt_logoff(&cli, &ctr) == False) {
1353 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1354 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1355 cli_nt_session_close(&cli);
1362 cli_nt_session_close(&cli);