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 extern int DEBUGLEVEL;
27 BOOL global_machine_pasword_needs_changing;
29 /* users from session setup */
30 static pstring session_users="";
33 extern pstring global_myname;
34 extern fstring global_myworkgroup;
36 /* Data to do lanman1/2 password challenge. */
37 static unsigned char saved_challenge[8];
38 static BOOL challenge_sent=False;
40 /*******************************************************************
41 Get the next challenge value - no repeats.
42 ********************************************************************/
43 void generate_next_challenge(char *challenge)
47 * Leave this ifdef'd out while we test
48 * the new crypto random number generator.
51 unsigned char buf[16];
52 static int counter = 0;
56 /* get a sort-of random number */
58 v1 = (counter++) + getpid() + tval.tv_sec;
59 v2 = (counter++) * getpid() + tval.tv_usec;
60 SIVAL(challenge,0,v1);
61 SIVAL(challenge,4,v2);
63 /* mash it up with md4 */
64 mdfour(buf, (unsigned char *)challenge, 8);
68 generate_random_buffer(buf,8,False);
70 memcpy(saved_challenge, buf, 8);
71 memcpy(challenge,buf,8);
72 challenge_sent = True;
75 /*******************************************************************
76 set the last challenge sent, usually from a password server
77 ********************************************************************/
78 BOOL set_challenge(char *challenge)
80 memcpy(saved_challenge,challenge,8);
81 challenge_sent = True;
85 /*******************************************************************
86 get the last challenge sent
87 ********************************************************************/
88 static BOOL last_challenge(unsigned char *challenge)
90 if (!challenge_sent) return(False);
91 memcpy(challenge,saved_challenge,8);
95 /* this holds info on user ids that are already validated for this VC */
96 static user_struct *validated_users = NULL;
97 static int num_validated_users = 0;
99 /****************************************************************************
100 check if a uid has been validated, and return an pointer to the user_struct
101 if it has. NULL if not. vuid is biased by an offset. This allows us to
102 tell random client vuid's (normally zero) from valid vuids.
103 ****************************************************************************/
104 user_struct *get_valid_user_struct(uint16 vuid)
106 if (vuid == UID_FIELD_INVALID)
109 if ((vuid >= (uint16)num_validated_users) ||
110 (validated_users[vuid].uid == -1) || (validated_users[vuid].gid == -1))
112 return &validated_users[vuid];
115 /****************************************************************************
117 ****************************************************************************/
118 void invalidate_vuid(uint16 vuid)
120 user_struct *vuser = get_valid_user_struct(vuid);
122 if (vuser == NULL) return;
129 /* same number of igroups as groups */
132 if (vuser->groups) free(vuser->groups);
134 if (vuser->sids) free(vuser->sids);
137 vuser->groups = NULL;
141 /****************************************************************************
142 return a validated username
143 ****************************************************************************/
144 char *validated_username(uint16 vuid)
146 user_struct *vuser = get_valid_user_struct(vuid);
153 /****************************************************************************
154 Setup the groups a user belongs to.
155 ****************************************************************************/
156 int setup_groups(char *user, int uid, int gid, int *p_ngroups, GID_T **p_groups)
162 if (-1 == initgroups(user,gid)) {
164 DEBUG(0,("Unable to initgroups!\n"));
165 if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000) {
166 DEBUG(0,("This is probably a problem with the account %s\n",
173 ngroups = getgroups(0,&grp);
174 if (ngroups <= 0) ngroups = 32;
176 groups = (GID_T *)malloc(sizeof(groups[0])*ngroups);
178 ngroups = getgroups(ngroups,(gid_t *)groups);
180 (*p_ngroups) = ngroups;
182 (*p_groups) = groups;
184 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
185 for (i = 0; i < ngroups; i++ ) {
186 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
188 DEBUG( 3, ( "\n" ) );
194 /****************************************************************************
195 register a uid/name pair as being valid and that a valid password
196 has been given. vuid is biased by an offset. This allows us to
197 tell random client vuid's (normally zero) from valid vuids.
198 ****************************************************************************/
199 uint16 register_vuid(int uid,int gid, char *unix_name, char *requested_name, BOOL guest)
202 struct passwd *pwfile; /* for getting real name from passwd file */
204 /* Ensure no vuid gets registered in share level security. */
205 if(lp_security() == SEC_SHARE)
206 return UID_FIELD_INVALID;
210 * After observing MS-Exchange services writing to a Samba share
211 * I belive this code is incorrect. Each service does its own
212 * sessionsetup_and_X for the same user, and as each service shuts
213 * down, it does a user_logoff_and_X. As we are consolidating multiple
214 * sessionsetup_and_X's onto the same vuid here, when the first service
215 * shuts down, it invalidates all the open files for the other services.
216 * Hence I am removing this code and forcing each sessionsetup_and_X
218 * Jeremy Allison. (jallison@whistle.com).
222 for(i = 0; i < num_validated_users; i++) {
223 vuser = &validated_users[i];
224 if ( vuser->uid == uid )
225 return (uint16)(i + VUID_OFFSET); /* User already validated */
229 validated_users = (user_struct *)Realloc(validated_users,
231 (num_validated_users+1));
233 if (!validated_users)
235 DEBUG(0,("Failed to realloc users struct!\n"));
236 num_validated_users = 0;
237 return UID_FIELD_INVALID;
240 vuser = &validated_users[num_validated_users];
241 num_validated_users++;
245 vuser->guest = guest;
246 fstrcpy(vuser->name,unix_name);
247 fstrcpy(vuser->requested_name,requested_name);
253 vuser->groups = NULL;
255 /* Find all the groups this uid is in and store them.
256 Used by become_user() */
257 setup_groups(unix_name,uid,gid,
261 DEBUG(3,("uid %d registered to name %s\n",uid,unix_name));
263 DEBUG(3, ("Clearing default real name\n"));
264 fstrcpy(vuser->real_name, "<Full Name>\0");
265 if (lp_unix_realname()) {
266 if ((pwfile=getpwnam(vuser->name))!= NULL)
268 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
269 fstrcpy(vuser->real_name, pwfile->pw_gecos);
273 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
277 /****************************************************************************
278 add a name to the session users list
279 ****************************************************************************/
280 void add_session_user(char *user)
283 StrnCpy(suser,user,sizeof(suser)-1);
285 if (!Get_Pwnam(suser,True)) return;
287 if (suser && *suser && !in_list(suser,session_users,False))
289 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
290 DEBUG(1,("Too many session users??\n"));
293 pstrcat(session_users," ");
294 pstrcat(session_users,suser);
300 /****************************************************************************
301 update the encrypted smbpasswd file from the plaintext username and password
302 *****************************************************************************/
303 static BOOL update_smbpassword_file(char *user, char *password)
305 struct smb_passwd *smbpw;
309 smbpw = getsmbpwnam(user);
313 DEBUG(0,("getsmbpwnam returned NULL\n"));
317 /* Here, the flag is one, because we want to ignore the
318 XXXXXXX'd out password */
319 ret = change_oem_password( smbpw, password, True);
321 DEBUG(3,("change_oem_password returned False\n"));
331 /****************************************************************************
332 core of smb password checking routine.
333 ****************************************************************************/
334 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
336 /* Finish the encryption of part_passwd. */
337 unsigned char p21[21];
338 unsigned char p24[24];
340 if (part_passwd == NULL)
341 DEBUG(10,("No password set - allowing access\n"));
342 /* No password set - always true ! */
343 if (part_passwd == NULL)
347 memcpy(p21,part_passwd,16);
352 DEBUG(100,("Part password (P16) was |"));
353 for(i = 0; i < 16; i++)
354 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
356 DEBUG(100,("Password from client was |"));
357 for(i = 0; i < 24; i++)
358 DEBUG(100,("%X ", (unsigned char)password[i]));
360 DEBUG(100,("Given challenge was |"));
361 for(i = 0; i < 8; i++)
362 DEBUG(100,("%X ", (unsigned char)c8[i]));
364 DEBUG(100,("Value from encryption was |"));
365 for(i = 0; i < 24; i++)
366 DEBUG(100,("%X ", (unsigned char)p24[i]));
370 return (memcmp(p24, password, 24) == 0);
373 /****************************************************************************
374 Do a specific test for an smb password being correct, given a smb_password and
375 the lanman and NT responses.
376 ****************************************************************************/
377 BOOL smb_password_ok(struct smb_passwd *smb_pass,
378 uchar lm_pass[24], uchar nt_pass[24])
382 if (!lm_pass || !smb_pass) return(False);
384 if(smb_pass->acct_ctrl & ACB_DISABLED) {
385 DEBUG(3,("account for user %s was disabled.\n",
386 smb_pass->smb_name));
390 if (!last_challenge(challenge)) {
391 DEBUG(1,("no challenge done - password failed\n"));
395 DEBUG(4,("Checking SMB password for user %s\n",
396 smb_pass->smb_name));
398 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
399 /* We have the NT MD4 hash challenge available - see if we can
400 use it (ie. does it exist in the smbpasswd file).
402 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
403 if (smb_password_check((char *)nt_pass,
404 (uchar *)smb_pass->smb_nt_passwd,
406 DEBUG(4,("NT MD4 password check succeeded\n"));
409 DEBUG(4,("NT MD4 password check failed\n"));
412 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
413 no password, allow access. */
415 DEBUG(4,("Checking LM MD4 password\n"));
417 if((smb_pass->smb_passwd == NULL) &&
418 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
419 DEBUG(4,("no password required for user %s\n",
420 smb_pass->smb_name));
424 if((smb_pass->smb_passwd != NULL) &&
425 smb_password_check((char *)lm_pass,
426 (uchar *)smb_pass->smb_passwd, challenge)) {
427 DEBUG(4,("LM MD4 password check succeeded\n"));
431 DEBUG(4,("LM MD4 password check failed\n"));
437 /****************************************************************************
438 check if a username/password is OK assuming the password is a 24 byte
440 return True if the password is correct, False otherwise
441 ****************************************************************************/
442 static BOOL pass_check_smb(char *user,char *password, struct passwd *pwd)
446 struct smb_passwd *smb_pass;
453 challenge_done = last_challenge(challenge);
455 if (!challenge_done) {
456 DEBUG(0,("Error: challenge not done for user=%s\n", user));
461 pass = (struct passwd *) pwd;
462 user = pass->pw_name;
464 pass = Get_Pwnam(user,True);
468 DEBUG(3,("Couldn't find user %s\n",user));
472 smb_pass = getsmbpwnam(user);
475 DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
479 /* Quit if the account was disabled. */
480 if(smb_pass->acct_ctrl & ACB_DISABLED) {
481 DEBUG(3,("account for user %s was disabled.\n", user));
485 /* Ensure the uid's match */
486 if (smb_pass->smb_userid != pass->pw_uid) {
487 DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
491 if (smb_password_ok(smb_pass,
492 (unsigned char *)password,
493 (uchar *)password)) {
497 DEBUG(3,("Error smb_password_check failed\n"));
501 /****************************************************************************
502 check if a username/password pair is OK either via the system password
503 database or the encrypted SMB password database
504 return True if the password is correct, False otherwise
505 ****************************************************************************/
506 BOOL password_ok(char *user,char *password, int pwlen, struct passwd *pwd)
509 /* if it is 24 bytes long then assume it is an encrypted
511 return pass_check_smb(user, password, pwd);
514 return pass_check(user, password, pwlen, pwd,
515 lp_update_encrypted() ?
516 update_smbpassword_file : NULL);
519 /****************************************************************************
520 check if a username is valid
521 ****************************************************************************/
522 BOOL user_ok(char *user,int snum)
524 pstring valid, invalid;
527 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
528 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
530 string_sub(valid,"%S",lp_servicename(snum));
531 string_sub(invalid,"%S",lp_servicename(snum));
533 ret = !user_in_list(user,invalid);
535 if (ret && valid && *valid) {
536 ret = user_in_list(user,valid);
539 if (ret && lp_onlyuser(snum)) {
540 char *user_list = lp_username(snum);
541 string_sub(user_list,"%S",lp_servicename(snum));
542 ret = user_in_list(user,user_list);
551 /****************************************************************************
552 validate a group username entry. Return the username or NULL
553 ****************************************************************************/
554 static char *validate_group(char *group,char *password,int pwlen,int snum)
558 char *host, *user, *domain;
560 while (getnetgrent(&host, &user, &domain)) {
562 if (user_ok(user, snum) &&
563 password_ok(user,password,pwlen,NULL)) {
575 struct group *gptr = (struct group *)getgrnam(group);
579 member = gptr->gr_mem;
580 while (member && *member)
583 fstrcpy(name,*member);
584 if (user_ok(name,snum) &&
585 password_ok(name,password,pwlen,NULL))
589 #ifdef GROUP_CHECK_PWENT
595 while (pwd = getpwent ()) {
596 if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
597 /* This Entry have PASSWORD and same GID then check pwd */
598 if (password_ok(NULL, password, pwlen, pwd)) {
599 fstrcpy(tm, pwd->pw_name);
607 #endif /* GROUP_CHECK_PWENT */
616 /****************************************************************************
617 check for authority to login to a service with a given username/password
618 ****************************************************************************/
619 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
620 BOOL *guest,BOOL *force,uint16 vuid)
627 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
630 /* there are several possibilities:
631 1) login as the given user with given password
632 2) login as a previously registered username with the given password
633 3) login as a session list username with the given password
634 4) login as a previously validated user/password pair
635 5) login as the "user =" user with given password
636 6) login as the "user =" user with no password (guest connection)
637 7) login as guest user with no password
639 if the service is guest_only then steps 1 to 5 are skipped
642 if (GUEST_ONLY(snum)) *force = True;
644 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
647 user_struct *vuser = get_valid_user_struct(vuid);
649 /* check the given username and password */
650 if (!ok && (*user) && user_ok(user,snum)) {
651 ok = password_ok(user,password, pwlen, NULL);
652 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
655 /* check for a previously registered guest username */
656 if (!ok && (vuser != 0) && vuser->guest) {
657 if (user_ok(vuser->name,snum) &&
658 password_ok(vuser->name, password, pwlen, NULL)) {
659 fstrcpy(user, vuser->name);
660 vuser->guest = False;
661 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
667 /* now check the list of session users */
671 char *user_list = strdup(session_users);
672 if (!user_list) return(False);
674 for (auser=strtok(user_list,LIST_SEP);
676 auser = strtok(NULL,LIST_SEP))
679 fstrcpy(user2,auser);
680 if (!user_ok(user2,snum)) continue;
682 if (password_ok(user2,password, pwlen, NULL)) {
685 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
691 /* check for a previously validated username/password pair */
692 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
693 (vuser != 0) && !vuser->guest &&
694 user_ok(vuser->name,snum)) {
695 fstrcpy(user,vuser->name);
697 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
701 /* check for a rhosts entry */
702 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
704 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
707 /* check the user= fields and the given password */
708 if (!ok && lp_username(snum)) {
711 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
713 string_sub(user_list,"%S",lp_servicename(snum));
715 for (auser=strtok(user_list,LIST_SEP);
717 auser = strtok(NULL,LIST_SEP))
721 auser = validate_group(auser+1,password,pwlen,snum);
726 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
732 fstrcpy(user2,auser);
733 if (user_ok(user2,snum) &&
734 password_ok(user2,password,pwlen,NULL))
738 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
743 } /* not guest only */
745 /* check for a normal guest connection */
746 if (!ok && GUEST_OK(snum))
749 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
750 if (Get_Pwnam(guestname,True))
752 fstrcpy(user,guestname);
754 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
757 DEBUG(0,("Invalid guest account %s??\n",guestname));
762 if (ok && !user_ok(user,snum))
764 DEBUG(0,("rejected invalid user %s\n",user));
772 /****************************************************************************
773 read the a hosts.equiv or .rhosts file and check if it
774 allows this user from this machine
775 ****************************************************************************/
776 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
779 int plus_allowed = 1;
782 FILE *fp = fopen(equiv_file, "r");
783 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
784 if (! fp) return False;
785 while(fgets(buf, sizeof(buf), fp))
787 trim_string(buf," "," ");
789 if (buf[0] != '#' && buf[0] != '\n')
791 BOOL is_group = False;
794 if (strcmp(buf, "NO_PLUS\n") == 0)
796 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
803 if (*bp == '\n' && plus_allowed)
805 /* a bare plus means everbody allowed */
806 DEBUG(6, ("check_user_equiv everybody allowed\n"));
811 else if (buf[0] == '-')
821 file_host = strtok(bp, " \t\n");
822 file_user = strtok(NULL, " \t\n");
823 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
824 file_user ? file_user : "(null)" ));
825 if (file_host && *file_host)
827 BOOL host_ok = False;
829 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
832 static char *mydomain = NULL;
834 yp_get_default_domain(&mydomain);
835 if (mydomain && innetgr(file_host,remote,user,mydomain))
841 DEBUG(1,("Netgroups not configured\n"));
846 /* is it this host */
847 /* the fact that remote has come from a call of gethostbyaddr
848 * means that it may have the fully qualified domain name
849 * so we could look up the file version to get it into
850 * a canonical form, but I would rather just type it
851 * in full in the equiv file
853 if (!host_ok && !is_group && strequal(remote, file_host))
859 /* is it this user */
860 if (file_user == 0 || strequal(user, file_user))
863 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
864 (plus ? "+" : "-"), file_host,
865 (file_user ? file_user : "")));
866 return (plus ? True : False);
877 /****************************************************************************
878 check for a possible hosts equiv or rhosts entry for the user
879 ****************************************************************************/
880 BOOL check_hosts_equiv(char *user)
884 struct passwd *pass = Get_Pwnam(user,True);
889 fname = lp_hosts_equiv();
891 /* note: don't allow hosts.equiv on root */
892 if (fname && *fname && (pass->pw_uid != 0)) {
894 if (check_user_equiv(user,client_name(Client),fname))
900 char *home = get_home_dir(user);
903 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
904 if (check_user_equiv(user,client_name(Client),rhostsfile))
913 static struct cli_state pw_cli;
915 /****************************************************************************
916 return the client state structure
917 ****************************************************************************/
918 struct cli_state *server_client(void)
923 /****************************************************************************
924 support for server level security
925 ****************************************************************************/
926 struct cli_state *server_cryptkey(void)
929 struct in_addr dest_ip;
930 extern fstring local_machine;
932 BOOL connected_ok = False;
933 struct nmb_name calling, called;
935 if (!cli_initialise(&pw_cli))
938 p = lp_passwordserver();
939 while(p && next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
940 standard_sub_basic(desthost);
943 if(!resolve_name( desthost, &dest_ip)) {
944 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
948 if (ismyip(dest_ip)) {
949 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
953 if (cli_connect(&pw_cli, desthost, &dest_ip)) {
954 DEBUG(3,("connected to password server %s\n",desthost));
961 DEBUG(0,("password server not available\n"));
962 cli_shutdown(&pw_cli);
966 make_nmb_name(&calling, local_machine, 0x0 , scope);
967 make_nmb_name(&called , desthost , 0x20, scope);
969 if (!cli_session_request(&pw_cli, &calling, &called))
971 DEBUG(1,("%s rejected the session\n",desthost));
972 cli_shutdown(&pw_cli);
976 DEBUG(3,("got session\n"));
978 if (!cli_negprot(&pw_cli)) {
979 DEBUG(1,("%s rejected the negprot\n",desthost));
980 cli_shutdown(&pw_cli);
984 if (pw_cli.protocol < PROTOCOL_LANMAN2 ||
985 !(pw_cli.sec_mode & 1)) {
986 DEBUG(1,("%s isn't in user level security mode\n",desthost));
987 cli_shutdown(&pw_cli);
991 DEBUG(3,("password server OK\n"));
996 /****************************************************************************
997 validate a password with the password server
998 ****************************************************************************/
999 BOOL server_validate(char *user, char *domain,
1000 char *pass, int passlen,
1001 char *ntpass, int ntpasslen)
1003 extern fstring local_machine;
1004 static unsigned char badpass[24];
1006 if (!pw_cli.initialised) {
1007 DEBUG(1,("password server %s is not connected\n", pw_cli.desthost));
1011 if(badpass[0] == 0) {
1012 memset(badpass, 0x1f, sizeof(badpass));
1015 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1016 /* Very unlikely, our random bad password is the same as the users
1018 memset(badpass, badpass[0]+1, sizeof(badpass));
1022 * Attempt a session setup with a totally incorrect password.
1023 * If this succeeds with the guest bit *NOT* set then the password
1024 * server is broken and is not correctly setting the guest bit. We
1025 * need to detect this as some versions of NT4.x are broken. JRA.
1028 if (cli_session_setup(&pw_cli, user, (char *)badpass, sizeof(badpass),
1029 (char *)badpass, sizeof(badpass), domain)) {
1030 if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) == 0) {
1031 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1032 with a bad password.\n", pw_cli.desthost));
1033 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1034 use this machine as the password server.\n"));
1035 cli_ulogoff(&pw_cli);
1038 cli_ulogoff(&pw_cli);
1042 * Now we know the password server will correctly set the guest bit, or is
1043 * not guest enabled, we can try with the real password.
1046 if (!cli_session_setup(&pw_cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1047 DEBUG(1,("password server %s rejected the password\n", pw_cli.desthost));
1051 /* if logged in as guest then reject */
1052 if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) != 0) {
1053 DEBUG(1,("password server %s gave us guest only\n", pw_cli.desthost));
1054 cli_ulogoff(&pw_cli);
1059 * This patch from Rob Nielsen <ran@adc.com> makes doing
1060 * the NetWksaUserLogon a dynamic, rather than compile-time
1061 * parameter, defaulting to on. This is somewhat dangerous
1062 * as it allows people to turn off this neccessary check,
1063 * but so many people have had problems with this that I
1064 * think it is a neccessary change. JRA.
1067 if (lp_net_wksta_user_logon()) {
1068 DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
1070 if (!cli_send_tconX(&pw_cli, "IPC$", "IPC", "", 1)) {
1071 DEBUG(0,("password server %s refused IPC$ connect\n", pw_cli.desthost));
1072 cli_ulogoff(&pw_cli);
1076 if (!cli_NetWkstaUserLogon(&pw_cli,user,local_machine)) {
1077 DEBUG(0,("password server %s failed NetWkstaUserLogon\n", pw_cli.desthost));
1079 cli_ulogoff(&pw_cli);
1083 if (pw_cli.privilages == 0) {
1084 DEBUG(0,("password server %s gave guest privilages\n", pw_cli.desthost));
1086 cli_ulogoff(&pw_cli);
1090 if (!strequal(pw_cli.eff_name, user)) {
1091 DEBUG(0,("password server %s gave different username %s\n",
1095 cli_ulogoff(&pw_cli);
1101 DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
1104 DEBUG(3,("password server %s accepted the password\n", pw_cli.desthost));
1106 cli_ulogoff(&pw_cli);
1111 /***********************************************************************
1112 Do the same as security=server, but using NT Domain calls and a session
1113 key from the machine password.
1114 ************************************************************************/
1116 BOOL domain_client_validate( char *user, char *domain,
1117 char *smb_apasswd, int smb_apasslen,
1118 char *smb_ntpasswd, int smb_ntpasslen)
1120 unsigned char local_challenge[8];
1121 unsigned char local_lm_response[24];
1122 unsigned char local_nt_reponse[24];
1123 unsigned char trust_passwd[16];
1125 fstring remote_machine;
1127 struct in_addr dest_ip;
1128 NET_ID_INFO_CTR ctr;
1129 NET_USER_INFO_3 info3;
1130 struct cli_state cli;
1132 BOOL connected_ok = False;
1133 struct nmb_name calling, called;
1136 * Check that the requested domain is not our own machine name.
1137 * If it is, we should never check the PDC here, we use our own local
1141 if(strequal( domain, global_myname)) {
1142 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1147 * Next, check that the passwords given were encrypted.
1150 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1151 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1154 * Not encrypted - do so.
1157 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1158 generate_random_buffer( local_challenge, 8, False);
1159 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1160 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1163 smb_apasswd = (char *)local_lm_response;
1164 smb_ntpasswd = (char *)local_nt_reponse;
1168 * Encrypted - get the challenge we sent for these
1172 if (!last_challenge(local_challenge)) {
1173 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1179 * Get the machine account password.
1181 if(!trust_password_lock( global_myworkgroup, global_myname, False)) {
1182 DEBUG(0,("domain_client_validate: unable to open the machine account password file for \
1183 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1187 if(get_trust_account_password( trust_passwd, &lct) == False) {
1188 DEBUG(0,("domain_client_validate: unable to read the machine account password for \
1189 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1190 trust_password_unlock();
1194 trust_password_unlock();
1197 * Here we check the last change time to see if the machine
1198 * password needs changing. JRA.
1201 if(time(NULL) > lct + lp_machine_password_timeout())
1202 global_machine_pasword_needs_changing = True;
1205 * At this point, smb_apasswd points to the lanman response to
1206 * the challenge in local_challenge, and smb_ntpasswd points to
1207 * the NT response to the challenge in local_challenge. Ship
1208 * these over the secure channel to a domain controller and
1209 * see if they were valid.
1214 if(cli_initialise(&cli) == False) {
1215 DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
1220 * Treat each name in the 'password server =' line as a potential
1221 * PDC/BDC. Contact each in turn and try and authenticate.
1224 p = lp_passwordserver();
1225 while(p && next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1227 standard_sub_basic(remote_machine);
1228 strupper(remote_machine);
1230 if(!resolve_name( remote_machine, &dest_ip)) {
1231 DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
1235 if (ismyip(dest_ip)) {
1236 DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
1240 if (!cli_connect(&cli, remote_machine, &dest_ip)) {
1241 DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
1242 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1246 make_nmb_name(&calling, global_myname , 0x0 , scope);
1247 make_nmb_name(&called , remote_machine, 0x20, scope);
1249 if (!cli_session_request(&pw_cli, &calling, &called))
1251 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1252 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1257 cli.protocol = PROTOCOL_NT1;
1259 if (!cli_negprot(&cli)) {
1260 DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
1261 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1266 if (cli.protocol != PROTOCOL_NT1) {
1267 DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
1274 * Do an anonymous session setup.
1277 if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
1278 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1279 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1284 if (!(cli.sec_mode & 1)) {
1285 DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
1291 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
1292 DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
1293 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1299 * We have an anonymous connection to IPC$.
1301 connected_ok = True;
1305 if (!connected_ok) {
1306 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1312 * Ok - we have an anonymous connection to the IPC$ share.
1313 * Now start the NT Domain stuff :-).
1316 if(cli_nt_session_open(&cli, PIPE_NETLOGON, False) == False) {
1317 DEBUG(0,("domain_client_validate: unable to open the domain client session to \
1318 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1319 cli_nt_session_close(&cli);
1325 if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
1326 DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
1327 %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1328 cli_nt_session_close(&cli);
1334 /* We really don't care what LUID we give the user. */
1335 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1337 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1338 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1339 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1340 &ctr, &info3) == False) {
1341 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1342 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1343 cli_nt_session_close(&cli);
1350 * Here, if we really want it, we have lots of info about the user in info3.
1355 * We don't actually need to do this - plus it fails currently with
1356 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1360 if(cli_nt_logoff(&cli, &ctr) == False) {
1361 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1362 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1363 cli_nt_session_close(&cli);
1370 cli_nt_session_close(&cli);