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(unsigned 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 == (uid_t)-1) || (validated_users[vuid].gid == (gid_t)-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;
124 vuser->uid = (uid_t)-1;
125 vuser->gid = (gid_t)-1;
129 /* same number of igroups as groups */
133 free((char *)vuser->groups);
136 free((char *)vuser->sids);
139 vuser->groups = NULL;
143 /****************************************************************************
144 return a validated username
145 ****************************************************************************/
146 char *validated_username(uint16 vuid)
148 user_struct *vuser = get_valid_user_struct(vuid);
155 /****************************************************************************
156 Setup the groups a user belongs to.
157 ****************************************************************************/
158 int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
162 gid_t *groups = NULL;
164 if (-1 == initgroups(user,gid)) {
166 DEBUG(0,("Unable to initgroups!\n"));
167 if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000) {
168 DEBUG(0,("This is probably a problem with the account %s\n",
175 ngroups = sys_getgroups(0,&grp);
179 if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL) {
180 DEBUG(0,("setup_groups malloc fail !\n"));
184 ngroups = sys_getgroups(ngroups,groups);
186 (*p_ngroups) = ngroups;
187 (*p_groups) = groups;
189 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
190 for (i = 0; i < ngroups; i++ ) {
191 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
193 DEBUG( 3, ( "\n" ) );
199 /****************************************************************************
200 register a uid/name pair as being valid and that a valid password
201 has been given. vuid is biased by an offset. This allows us to
202 tell random client vuid's (normally zero) from valid vuids.
203 ****************************************************************************/
204 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest)
207 struct passwd *pwfile; /* for getting real name from passwd file */
209 /* Ensure no vuid gets registered in share level security. */
210 if(lp_security() == SEC_SHARE)
211 return UID_FIELD_INVALID;
215 * After observing MS-Exchange services writing to a Samba share
216 * I belive this code is incorrect. Each service does its own
217 * sessionsetup_and_X for the same user, and as each service shuts
218 * down, it does a user_logoff_and_X. As we are consolidating multiple
219 * sessionsetup_and_X's onto the same vuid here, when the first service
220 * shuts down, it invalidates all the open files for the other services.
221 * Hence I am removing this code and forcing each sessionsetup_and_X
223 * Jeremy Allison. (jallison@whistle.com).
227 for(i = 0; i < num_validated_users; i++) {
228 vuser = &validated_users[i];
229 if ( vuser->uid == uid )
230 return (uint16)(i + VUID_OFFSET); /* User already validated */
234 validated_users = (user_struct *)Realloc(validated_users,
236 (num_validated_users+1));
238 if (!validated_users)
240 DEBUG(0,("Failed to realloc users struct!\n"));
241 num_validated_users = 0;
242 return UID_FIELD_INVALID;
245 vuser = &validated_users[num_validated_users];
246 num_validated_users++;
250 vuser->guest = guest;
251 fstrcpy(vuser->name,unix_name);
252 fstrcpy(vuser->requested_name,requested_name);
258 vuser->groups = NULL;
260 /* Find all the groups this uid is in and store them.
261 Used by become_user() */
262 setup_groups(unix_name,uid,gid,
266 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
268 DEBUG(3, ("Clearing default real name\n"));
269 fstrcpy(vuser->real_name, "<Full Name>\0");
270 if (lp_unix_realname()) {
271 if ((pwfile=getpwnam(vuser->name))!= NULL)
273 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
274 fstrcpy(vuser->real_name, pwfile->pw_gecos);
278 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
282 /****************************************************************************
283 add a name to the session users list
284 ****************************************************************************/
285 void add_session_user(char *user)
288 StrnCpy(suser,user,sizeof(suser)-1);
290 if (!Get_Pwnam(suser,True)) return;
292 if (suser && *suser && !in_list(suser,session_users,False))
294 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
295 DEBUG(1,("Too many session users??\n"));
298 pstrcat(session_users," ");
299 pstrcat(session_users,suser);
305 /****************************************************************************
306 update the encrypted smbpasswd file from the plaintext username and password
307 *****************************************************************************/
308 static BOOL update_smbpassword_file(char *user, char *password)
310 struct smb_passwd *smbpw;
314 smbpw = getsmbpwnam(user);
318 DEBUG(0,("getsmbpwnam returned NULL\n"));
322 /* Here, the flag is one, because we want to ignore the
323 XXXXXXX'd out password */
324 ret = change_oem_password( smbpw, password, True);
326 DEBUG(3,("change_oem_password returned False\n"));
336 /****************************************************************************
337 core of smb password checking routine.
338 ****************************************************************************/
339 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
341 /* Finish the encryption of part_passwd. */
342 unsigned char p21[21];
343 unsigned char p24[24];
345 if (part_passwd == NULL)
346 DEBUG(10,("No password set - allowing access\n"));
347 /* No password set - always true ! */
348 if (part_passwd == NULL)
352 memcpy(p21,part_passwd,16);
357 DEBUG(100,("Part password (P16) was |"));
358 for(i = 0; i < 16; i++)
359 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
361 DEBUG(100,("Password from client was |"));
362 for(i = 0; i < 24; i++)
363 DEBUG(100,("%X ", (unsigned char)password[i]));
365 DEBUG(100,("Given challenge was |"));
366 for(i = 0; i < 8; i++)
367 DEBUG(100,("%X ", (unsigned char)c8[i]));
369 DEBUG(100,("Value from encryption was |"));
370 for(i = 0; i < 24; i++)
371 DEBUG(100,("%X ", (unsigned char)p24[i]));
375 return (memcmp(p24, password, 24) == 0);
378 /****************************************************************************
379 Do a specific test for an smb password being correct, given a smb_password and
380 the lanman and NT responses.
381 ****************************************************************************/
383 BOOL smb_password_ok(struct smb_passwd *smb_pass,
384 uchar lm_pass[24], uchar nt_pass[24])
388 if (!lm_pass || !smb_pass) return(False);
390 DEBUG(4,("Checking SMB password for user %s\n",
391 smb_pass->smb_name));
393 if(smb_pass->acct_ctrl & ACB_DISABLED) {
394 DEBUG(3,("account for user %s was disabled.\n",
395 smb_pass->smb_name));
399 if (!last_challenge(challenge)) {
400 DEBUG(1,("no challenge done - password failed\n"));
404 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
405 /* We have the NT MD4 hash challenge available - see if we can
406 use it (ie. does it exist in the smbpasswd file).
408 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
409 if (smb_password_check((char *)nt_pass,
410 (uchar *)smb_pass->smb_nt_passwd,
412 DEBUG(4,("NT MD4 password check succeeded\n"));
415 DEBUG(4,("NT MD4 password check failed\n"));
418 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
419 no password, allow access. */
421 DEBUG(4,("Checking LM MD4 password\n"));
423 if((smb_pass->smb_passwd == NULL) &&
424 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
425 DEBUG(4,("no password required for user %s\n",
426 smb_pass->smb_name));
430 if((smb_pass->smb_passwd != NULL) &&
431 smb_password_check((char *)lm_pass,
432 (uchar *)smb_pass->smb_passwd, challenge)) {
433 DEBUG(4,("LM MD4 password check succeeded\n"));
437 DEBUG(4,("LM MD4 password check failed\n"));
443 /****************************************************************************
444 check if a username/password is OK assuming the password is a 24 byte
446 return True if the password is correct, False otherwise
447 ****************************************************************************/
448 static BOOL pass_check_smb(char *user,char *password, struct passwd *pwd)
452 struct smb_passwd *smb_pass;
459 challenge_done = last_challenge(challenge);
461 if (!challenge_done) {
462 DEBUG(0,("Error: challenge not done for user=%s\n", user));
467 pass = (struct passwd *) pwd;
468 user = pass->pw_name;
470 pass = Get_Pwnam(user,True);
474 DEBUG(3,("Couldn't find user %s\n",user));
478 smb_pass = getsmbpwnam(user);
481 DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
485 /* Quit if the account was disabled. */
486 if(smb_pass->acct_ctrl & ACB_DISABLED) {
487 DEBUG(3,("account for user %s was disabled.\n", user));
491 /* Ensure the uid's match */
492 if (smb_pass->smb_userid != pass->pw_uid) {
493 DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
497 if(password[0] == '\0' && smb_pass->acct_ctrl & ACB_PWNOTREQ && lp_null_passwords()) {
498 DEBUG(3,("account for user %s has no password and null passwords are allowed.\n", smb_pass->smb_name));
502 if (smb_password_ok(smb_pass,
503 (unsigned char *)password,
504 (uchar *)password)) {
508 DEBUG(3,("Error smb_password_check failed\n"));
512 /****************************************************************************
513 check if a username/password pair is OK either via the system password
514 database or the encrypted SMB password database
515 return True if the password is correct, False otherwise
516 ****************************************************************************/
517 BOOL password_ok(char *user,char *password, int pwlen, struct passwd *pwd)
519 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords())) {
520 /* if it is 24 bytes long then assume it is an encrypted
522 return pass_check_smb(user, password, pwd);
525 return pass_check(user, password, pwlen, pwd,
526 lp_update_encrypted() ?
527 update_smbpassword_file : NULL);
530 /****************************************************************************
531 check if a username is valid
532 ****************************************************************************/
533 BOOL user_ok(char *user,int snum)
535 pstring valid, invalid;
538 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
539 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
541 string_sub(valid,"%S",lp_servicename(snum));
542 string_sub(invalid,"%S",lp_servicename(snum));
544 ret = !user_in_list(user,invalid);
546 if (ret && valid && *valid) {
547 ret = user_in_list(user,valid);
550 if (ret && lp_onlyuser(snum)) {
551 char *user_list = lp_username(snum);
552 string_sub(user_list,"%S",lp_servicename(snum));
553 ret = user_in_list(user,user_list);
562 /****************************************************************************
563 validate a group username entry. Return the username or NULL
564 ****************************************************************************/
565 static char *validate_group(char *group,char *password,int pwlen,int snum)
569 char *host, *user, *domain;
571 while (getnetgrent(&host, &user, &domain)) {
573 if (user_ok(user, snum) &&
574 password_ok(user,password,pwlen,NULL)) {
586 struct group *gptr = (struct group *)getgrnam(group);
590 member = gptr->gr_mem;
591 while (member && *member)
594 fstrcpy(name,*member);
595 if (user_ok(name,snum) &&
596 password_ok(name,password,pwlen,NULL))
600 #ifdef GROUP_CHECK_PWENT
606 while (pwd = getpwent ()) {
607 if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
608 /* This Entry have PASSWORD and same GID then check pwd */
609 if (password_ok(NULL, password, pwlen, pwd)) {
610 fstrcpy(tm, pwd->pw_name);
618 #endif /* GROUP_CHECK_PWENT */
627 /****************************************************************************
628 check for authority to login to a service with a given username/password
629 ****************************************************************************/
630 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
631 BOOL *guest,BOOL *force,uint16 vuid)
638 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
641 /* there are several possibilities:
642 1) login as the given user with given password
643 2) login as a previously registered username with the given password
644 3) login as a session list username with the given password
645 4) login as a previously validated user/password pair
646 5) login as the "user =" user with given password
647 6) login as the "user =" user with no password (guest connection)
648 7) login as guest user with no password
650 if the service is guest_only then steps 1 to 5 are skipped
653 if (GUEST_ONLY(snum)) *force = True;
655 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
658 user_struct *vuser = get_valid_user_struct(vuid);
660 /* check the given username and password */
661 if (!ok && (*user) && user_ok(user,snum)) {
662 ok = password_ok(user,password, pwlen, NULL);
663 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
666 /* check for a previously registered guest username */
667 if (!ok && (vuser != 0) && vuser->guest) {
668 if (user_ok(vuser->name,snum) &&
669 password_ok(vuser->name, password, pwlen, NULL)) {
670 fstrcpy(user, vuser->name);
671 vuser->guest = False;
672 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
678 /* now check the list of session users */
682 char *user_list = strdup(session_users);
683 if (!user_list) return(False);
685 for (auser=strtok(user_list,LIST_SEP);
687 auser = strtok(NULL,LIST_SEP))
690 fstrcpy(user2,auser);
691 if (!user_ok(user2,snum)) continue;
693 if (password_ok(user2,password, pwlen, NULL)) {
696 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
702 /* check for a previously validated username/password pair */
703 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
704 (vuser != 0) && !vuser->guest &&
705 user_ok(vuser->name,snum)) {
706 fstrcpy(user,vuser->name);
708 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
712 /* check for a rhosts entry */
713 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
715 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
718 /* check the user= fields and the given password */
719 if (!ok && lp_username(snum)) {
722 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
724 string_sub(user_list,"%S",lp_servicename(snum));
726 for (auser=strtok(user_list,LIST_SEP);
728 auser = strtok(NULL,LIST_SEP))
732 auser = validate_group(auser+1,password,pwlen,snum);
737 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
743 fstrcpy(user2,auser);
744 if (user_ok(user2,snum) &&
745 password_ok(user2,password,pwlen,NULL))
749 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
754 } /* not guest only */
756 /* check for a normal guest connection */
757 if (!ok && GUEST_OK(snum))
760 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
761 if (Get_Pwnam(guestname,True))
763 fstrcpy(user,guestname);
765 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
768 DEBUG(0,("Invalid guest account %s??\n",guestname));
773 if (ok && !user_ok(user,snum))
775 DEBUG(0,("rejected invalid user %s\n",user));
783 /****************************************************************************
784 read the a hosts.equiv or .rhosts file and check if it
785 allows this user from this machine
786 ****************************************************************************/
787 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
790 int plus_allowed = 1;
793 FILE *fp = fopen(equiv_file, "r");
794 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
795 if (! fp) return False;
796 while(fgets(buf, sizeof(buf), fp))
798 trim_string(buf," "," ");
800 if (buf[0] != '#' && buf[0] != '\n')
802 BOOL is_group = False;
805 if (strcmp(buf, "NO_PLUS\n") == 0)
807 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
814 if (*bp == '\n' && plus_allowed)
816 /* a bare plus means everbody allowed */
817 DEBUG(6, ("check_user_equiv everybody allowed\n"));
822 else if (buf[0] == '-')
832 file_host = strtok(bp, " \t\n");
833 file_user = strtok(NULL, " \t\n");
834 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
835 file_user ? file_user : "(null)" ));
836 if (file_host && *file_host)
838 BOOL host_ok = False;
840 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
843 static char *mydomain = NULL;
845 yp_get_default_domain(&mydomain);
846 if (mydomain && innetgr(file_host,remote,user,mydomain))
852 DEBUG(1,("Netgroups not configured\n"));
857 /* is it this host */
858 /* the fact that remote has come from a call of gethostbyaddr
859 * means that it may have the fully qualified domain name
860 * so we could look up the file version to get it into
861 * a canonical form, but I would rather just type it
862 * in full in the equiv file
864 if (!host_ok && !is_group && strequal(remote, file_host))
870 /* is it this user */
871 if (file_user == 0 || strequal(user, file_user))
874 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
875 (plus ? "+" : "-"), file_host,
876 (file_user ? file_user : "")));
877 return (plus ? True : False);
888 /****************************************************************************
889 check for a possible hosts equiv or rhosts entry for the user
890 ****************************************************************************/
891 BOOL check_hosts_equiv(char *user)
895 struct passwd *pass = Get_Pwnam(user,True);
900 fname = lp_hosts_equiv();
902 /* note: don't allow hosts.equiv on root */
903 if (fname && *fname && (pass->pw_uid != 0)) {
905 if (check_user_equiv(user,client_name(Client),fname))
911 char *home = get_home_dir(user);
914 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
915 if (check_user_equiv(user,client_name(Client),rhostsfile))
924 /****************************************************************************
925 return the client state structure
926 ****************************************************************************/
927 struct cli_state *server_client(void)
929 static struct cli_state pw_cli;
933 /****************************************************************************
934 support for server level security
935 ****************************************************************************/
936 struct cli_state *server_cryptkey(void)
938 struct cli_state *cli;
940 struct in_addr dest_ip;
941 extern fstring local_machine;
943 BOOL connected_ok = False;
944 struct nmb_name calling, called;
946 cli = server_client();
948 if (!cli_initialise(cli))
951 p = lp_passwordserver();
952 while(p && next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
953 standard_sub_basic(desthost);
956 if(!resolve_name( desthost, &dest_ip, 0x20)) {
957 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
961 if (ismyip(dest_ip)) {
962 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
966 if (cli_connect(cli, desthost, &dest_ip)) {
967 DEBUG(3,("connected to password server %s\n",desthost));
974 DEBUG(0,("password server not available\n"));
979 make_nmb_name(&calling, local_machine, 0x0 , scope);
980 make_nmb_name(&called , desthost , 0x20, scope);
982 if (!cli_session_request(cli, &calling, &called))
984 DEBUG(1,("%s rejected the session\n",desthost));
989 DEBUG(3,("got session\n"));
991 if (!cli_negprot(cli)) {
992 DEBUG(1,("%s rejected the negprot\n",desthost));
997 if (cli->protocol < PROTOCOL_LANMAN2 ||
998 !(cli->sec_mode & 1)) {
999 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1004 DEBUG(3,("password server OK\n"));
1009 /****************************************************************************
1010 validate a password with the password server
1011 ****************************************************************************/
1012 BOOL server_validate(char *user, char *domain,
1013 char *pass, int passlen,
1014 char *ntpass, int ntpasslen)
1016 struct cli_state *cli;
1017 extern fstring local_machine;
1018 static unsigned char badpass[24];
1019 cli = server_client();
1021 if (!cli->initialised) {
1022 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1026 if(badpass[0] == 0) {
1027 memset(badpass, 0x1f, sizeof(badpass));
1030 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1031 /* Very unlikely, our random bad password is the same as the users
1033 memset(badpass, badpass[0]+1, sizeof(badpass));
1037 * Attempt a session setup with a totally incorrect password.
1038 * If this succeeds with the guest bit *NOT* set then the password
1039 * server is broken and is not correctly setting the guest bit. We
1040 * need to detect this as some versions of NT4.x are broken. JRA.
1043 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1044 (char *)badpass, sizeof(badpass), domain)) {
1045 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1046 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1047 with a bad password.\n", cli->desthost));
1048 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1049 use this machine as the password server.\n"));
1057 * Now we know the password server will correctly set the guest bit, or is
1058 * not guest enabled, we can try with the real password.
1061 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1062 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1066 /* if logged in as guest then reject */
1067 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1068 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1074 * This patch from Rob Nielsen <ran@adc.com> makes doing
1075 * the NetWksaUserLogon a dynamic, rather than compile-time
1076 * parameter, defaulting to on. This is somewhat dangerous
1077 * as it allows people to turn off this neccessary check,
1078 * but so many people have had problems with this that I
1079 * think it is a neccessary change. JRA.
1082 if (lp_net_wksta_user_logon()) {
1083 DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", cli->desthost));
1085 if (!cli_send_tconX(cli, "IPC$", "IPC", "", 1)) {
1086 DEBUG(0,("password server %s refused IPC$ connect\n", cli->desthost));
1091 if (!cli_NetWkstaUserLogon(cli,user,local_machine)) {
1092 DEBUG(0,("password server %s failed NetWkstaUserLogon\n", cli->desthost));
1098 if (cli->privilages == 0) {
1099 DEBUG(0,("password server %s gave guest privilages\n", cli->desthost));
1105 if (!strequal(cli->eff_name, user)) {
1106 DEBUG(0,("password server %s gave different username %s\n",
1116 DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", cli->desthost));
1119 DEBUG(3,("password server %s accepted the password\n", cli->desthost));
1126 /***********************************************************************
1127 Do the same as security=server, but using NT Domain calls and a session
1128 key from the machine password.
1129 ************************************************************************/
1131 BOOL domain_client_validate( char *user, char *domain,
1132 char *smb_apasswd, int smb_apasslen,
1133 char *smb_ntpasswd, int smb_ntpasslen)
1135 unsigned char local_challenge[8];
1136 unsigned char local_lm_response[24];
1137 unsigned char local_nt_reponse[24];
1138 unsigned char trust_passwd[16];
1140 fstring remote_machine;
1142 struct in_addr dest_ip;
1143 NET_ID_INFO_CTR ctr;
1144 NET_USER_INFO_3 info3;
1145 struct cli_state cli;
1147 BOOL connected_ok = False;
1148 struct nmb_name calling, called;
1151 * Check that the requested domain is not our own machine name.
1152 * If it is, we should never check the PDC here, we use our own local
1156 if(strequal( domain, global_myname)) {
1157 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1162 * Next, check that the passwords given were encrypted.
1165 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1166 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1169 * Not encrypted - do so.
1172 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1173 generate_random_buffer( local_challenge, 8, False);
1174 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1175 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1178 smb_apasswd = (char *)local_lm_response;
1179 smb_ntpasswd = (char *)local_nt_reponse;
1183 * Encrypted - get the challenge we sent for these
1187 if (!last_challenge(local_challenge)) {
1188 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1194 * Get the machine account password.
1196 if(!trust_password_lock( global_myworkgroup, global_myname, False)) {
1197 DEBUG(0,("domain_client_validate: unable to open the machine account password file for \
1198 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1202 if(get_trust_account_password( trust_passwd, &lct) == False) {
1203 DEBUG(0,("domain_client_validate: unable to read the machine account password for \
1204 machine %s in domain %s.\n", global_myname, global_myworkgroup ));
1205 trust_password_unlock();
1209 trust_password_unlock();
1212 * Here we check the last change time to see if the machine
1213 * password needs changing. JRA.
1216 if(time(NULL) > lct + lp_machine_password_timeout())
1217 global_machine_pasword_needs_changing = True;
1220 * At this point, smb_apasswd points to the lanman response to
1221 * the challenge in local_challenge, and smb_ntpasswd points to
1222 * the NT response to the challenge in local_challenge. Ship
1223 * these over the secure channel to a domain controller and
1224 * see if they were valid.
1229 if(cli_initialise(&cli) == False) {
1230 DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
1235 * Treat each name in the 'password server =' line as a potential
1236 * PDC/BDC. Contact each in turn and try and authenticate.
1239 p = lp_passwordserver();
1240 while(p && next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1242 standard_sub_basic(remote_machine);
1243 strupper(remote_machine);
1245 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1246 DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
1250 if (ismyip(dest_ip)) {
1251 DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
1255 if (!cli_connect(&cli, remote_machine, &dest_ip)) {
1256 DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
1257 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1261 make_nmb_name(&calling, global_myname , 0x0 , scope);
1262 make_nmb_name(&called , remote_machine, 0x20, scope);
1264 if (!cli_session_request(&cli, &calling, &called))
1266 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1267 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1272 cli.protocol = PROTOCOL_NT1;
1274 if (!cli_negprot(&cli)) {
1275 DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
1276 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1281 if (cli.protocol != PROTOCOL_NT1) {
1282 DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
1289 * Do an anonymous session setup.
1292 if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
1293 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1294 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1299 if (!(cli.sec_mode & 1)) {
1300 DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
1306 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
1307 DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
1308 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1314 * We have an anonymous connection to IPC$.
1316 connected_ok = True;
1320 if (!connected_ok) {
1321 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1327 * Ok - we have an anonymous connection to the IPC$ share.
1328 * Now start the NT Domain stuff :-).
1331 if(cli_nt_session_open(&cli, PIPE_NETLOGON, False) == False) {
1332 DEBUG(0,("domain_client_validate: unable to open the domain client session to \
1333 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1334 cli_nt_session_close(&cli);
1340 if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
1341 DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
1342 %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1343 cli_nt_session_close(&cli);
1349 /* We really don't care what LUID we give the user. */
1350 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1352 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1353 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1354 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1355 &ctr, &info3) == False) {
1356 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1357 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1358 cli_nt_session_close(&cli);
1365 * Here, if we really want it, we have lots of info about the user in info3.
1370 * We don't actually need to do this - plus it fails currently with
1371 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1375 if(cli_nt_logoff(&cli, &ctr) == False) {
1376 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1377 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1378 cli_nt_session_close(&cli);
1385 cli_nt_session_close(&cli);