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;
26 extern struct in_addr ipzero;
28 /* users from session setup */
29 static pstring session_users="";
31 extern pstring global_myname;
32 extern fstring global_myworkgroup;
34 /* Data to do lanman1/2 password challenge. */
35 static unsigned char saved_challenge[8];
36 static BOOL challenge_sent=False;
38 /*******************************************************************
39 Get the next challenge value - no repeats.
40 ********************************************************************/
41 void generate_next_challenge(char *challenge)
45 * Leave this ifdef'd out while we test
46 * the new crypto random number generator.
49 unsigned char buf[16];
50 static int counter = 0;
54 /* get a sort-of random number */
56 v1 = (counter++) + getpid() + tval.tv_sec;
57 v2 = (counter++) * getpid() + tval.tv_usec;
58 SIVAL(challenge,0,v1);
59 SIVAL(challenge,4,v2);
61 /* mash it up with md4 */
62 mdfour(buf, (unsigned char *)challenge, 8);
66 generate_random_buffer(buf,8,False);
68 memcpy(saved_challenge, buf, 8);
69 memcpy(challenge,buf,8);
70 challenge_sent = True;
73 /*******************************************************************
74 set the last challenge sent, usually from a password server
75 ********************************************************************/
76 BOOL set_challenge(unsigned char *challenge)
78 memcpy(saved_challenge,challenge,8);
79 challenge_sent = True;
83 /*******************************************************************
84 get the last challenge sent
85 ********************************************************************/
86 static BOOL last_challenge(unsigned char *challenge)
88 if (!challenge_sent) return(False);
89 memcpy(challenge,saved_challenge,8);
93 /* this holds info on user ids that are already validated for this VC */
94 static user_struct *validated_users = NULL;
95 static int num_validated_users = 0;
97 /****************************************************************************
98 check if a uid has been validated, and return an pointer to the user_struct
99 if it has. NULL if not. vuid is biased by an offset. This allows us to
100 tell random client vuid's (normally zero) from valid vuids.
101 ****************************************************************************/
102 user_struct *get_valid_user_struct(uint16 vuid)
104 if (vuid == UID_FIELD_INVALID)
107 if ((vuid >= (uint16)num_validated_users) ||
108 (validated_users[vuid].uid == (uid_t)-1) || (validated_users[vuid].gid == (gid_t)-1))
110 return &validated_users[vuid];
113 /****************************************************************************
115 ****************************************************************************/
116 void invalidate_vuid(uint16 vuid)
118 user_struct *vuser = get_valid_user_struct(vuid);
120 if (vuser == NULL) return;
122 vuser->uid = (uid_t)-1;
123 vuser->gid = (gid_t)-1;
125 /* same number of igroups as groups */
129 free((char *)vuser->groups);
131 vuser->groups = NULL;
135 /****************************************************************************
136 return a validated username
137 ****************************************************************************/
138 char *validated_username(uint16 vuid)
140 user_struct *vuser = get_valid_user_struct(vuid);
147 /****************************************************************************
148 Setup the groups a user belongs to.
149 ****************************************************************************/
150 int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
154 gid_t *groups = NULL;
156 if (-1 == initgroups(user,gid))
158 DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
161 if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767)
163 DEBUG(0,("This is probably a problem with the account %s\n", user));
169 ngroups = sys_getgroups(0,&grp);
172 ngroups = groups_max();
175 if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
177 DEBUG(0,("setup_groups malloc fail !\n"));
181 ngroups = sys_getgroups(ngroups,groups);
183 (*p_ngroups) = ngroups;
184 (*p_groups) = groups;
186 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
187 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(uid_t uid,gid_t 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);
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",(int)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=sys_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"));
318 * Remove the account disabled flag - we are updating the
319 * users password from a login.
321 smbpw->acct_ctrl &= ~ACB_DISABLED;
323 /* Here, the flag is one, because we want to ignore the
324 XXXXXXX'd out password */
325 ret = change_oem_password( smbpw, password, True);
327 DEBUG(3,("change_oem_password returned False\n"));
337 /****************************************************************************
338 core of smb password checking routine.
339 ****************************************************************************/
340 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
342 /* Finish the encryption of part_passwd. */
343 unsigned char p21[21];
344 unsigned char p24[24];
346 if (part_passwd == NULL)
347 DEBUG(10,("No password set - allowing access\n"));
348 /* No password set - always true ! */
349 if (part_passwd == NULL)
353 memcpy(p21,part_passwd,16);
358 DEBUG(100,("Part password (P16) was |"));
359 for(i = 0; i < 16; i++)
360 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
362 DEBUG(100,("Password from client was |"));
363 for(i = 0; i < 24; i++)
364 DEBUG(100,("%X ", (unsigned char)password[i]));
366 DEBUG(100,("Given challenge was |"));
367 for(i = 0; i < 8; i++)
368 DEBUG(100,("%X ", (unsigned char)c8[i]));
370 DEBUG(100,("Value from encryption was |"));
371 for(i = 0; i < 24; i++)
372 DEBUG(100,("%X ", (unsigned char)p24[i]));
376 return (memcmp(p24, password, 24) == 0);
379 /****************************************************************************
380 Do a specific test for an smb password being correct, given a smb_password and
381 the lanman and NT responses.
382 ****************************************************************************/
383 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],
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(1,("account for user %s was disabled.\n",
395 smb_pass->smb_name));
401 DEBUG(5,("use last SMBnegprot challenge\n"));
402 if (!last_challenge(challenge))
404 DEBUG(1,("no challenge done - password failed\n"));
410 DEBUG(5,("challenge received\n"));
411 memcpy(challenge, chal, 8);
414 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
415 /* We have the NT MD4 hash challenge available - see if we can
416 use it (ie. does it exist in the smbpasswd file).
418 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
419 if (smb_password_check((char *)nt_pass,
420 (uchar *)smb_pass->smb_nt_passwd,
422 DEBUG(4,("NT MD4 password check succeeded\n"));
425 DEBUG(4,("NT MD4 password check failed\n"));
428 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
429 no password, allow access. */
431 DEBUG(4,("Checking LM MD4 password\n"));
433 if((smb_pass->smb_passwd == NULL) &&
434 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
435 DEBUG(4,("no password required for user %s\n",
436 smb_pass->smb_name));
440 if((smb_pass->smb_passwd != NULL) &&
441 smb_password_check((char *)lm_pass,
442 (uchar *)smb_pass->smb_passwd, challenge)) {
443 DEBUG(4,("LM MD4 password check succeeded\n"));
447 DEBUG(4,("LM MD4 password check failed\n"));
453 /****************************************************************************
454 check if a username/password is OK assuming the password is a 24 byte
456 return True if the password is correct, False otherwise
457 ****************************************************************************/
459 BOOL pass_check_smb(char *user, char *domain,
460 uchar *chal, uchar *lm_pwd, uchar *nt_pwd,
464 struct smb_passwd *smb_pass;
466 if (!lm_pwd || !nt_pwd)
471 if (pwd != NULL && user == NULL)
473 pass = (struct passwd *) pwd;
474 user = pass->pw_name;
478 pass = Get_Pwnam(user,True);
483 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
487 smb_pass = getsmbpwnam(user);
489 if (smb_pass == NULL)
491 DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user));
495 /* Quit if the account was disabled. */
496 if(smb_pass->acct_ctrl & ACB_DISABLED) {
497 DEBUG(1,("Account for user '%s' was disabled.\n", user));
501 /* Ensure the uid's match */
502 if (smb_pass->smb_userid != pass->pw_uid)
504 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
508 if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
510 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", smb_pass->smb_name));
514 if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd))
519 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
523 /****************************************************************************
524 check if a username/password pair is OK either via the system password
525 database or the encrypted SMB password database
526 return True if the password is correct, False otherwise
527 ****************************************************************************/
528 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
530 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
532 /* if 24 bytes long assume it is an encrypted password */
535 if (!last_challenge(challenge))
537 DEBUG(0,("Error: challenge not done for user=%s\n", user));
541 return pass_check_smb(user, global_myworkgroup,
542 challenge, (uchar *)password, (uchar *)password, pwd);
545 return pass_check(user, password, pwlen, pwd,
546 lp_update_encrypted() ?
547 update_smbpassword_file : NULL);
550 /****************************************************************************
551 check if a username is valid
552 ****************************************************************************/
553 BOOL user_ok(char *user,int snum)
555 pstring valid, invalid;
558 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
559 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
561 pstring_sub(valid,"%S",lp_servicename(snum));
562 pstring_sub(invalid,"%S",lp_servicename(snum));
564 ret = !user_in_list(user,invalid);
566 if (ret && valid && *valid) {
567 ret = user_in_list(user,valid);
570 if (ret && lp_onlyuser(snum)) {
571 char *user_list = lp_username(snum);
572 pstring_sub(user_list,"%S",lp_servicename(snum));
573 ret = user_in_list(user,user_list);
582 /****************************************************************************
583 validate a group username entry. Return the username or NULL
584 ****************************************************************************/
585 static char *validate_group(char *group,char *password,int pwlen,int snum)
589 char *host, *user, *domain;
591 while (getnetgrent(&host, &user, &domain)) {
593 if (user_ok(user, snum) &&
594 password_ok(user,password,pwlen,NULL)) {
608 while ((gptr = (struct group *)getgrent())) {
609 if (strequal(gptr->gr_name,group))
614 * As user_ok can recurse doing a getgrent(), we must
615 * copy the member list into a pstring on the stack before
616 * use. Bug pointed out by leon@eatworms.swmed.edu.
622 size_t copied_len = 0;
626 member = member_list;
628 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
629 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
630 if( copied_len + member_len < sizeof(pstring)) {
632 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
634 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
635 copied_len += member_len;
636 member += copied_len;
644 member = member_list;
647 fstrcpy(name,member);
648 if (user_ok(name,snum) &&
649 password_ok(name,password,pwlen,NULL)) {
654 DEBUG(10,("validate_group = member = %s\n", member));
656 member += strlen(member) + 1;
669 /****************************************************************************
670 check for authority to login to a service with a given username/password
671 ****************************************************************************/
672 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
673 BOOL *guest,BOOL *force,uint16 vuid)
680 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
683 /* there are several possibilities:
684 1) login as the given user with given password
685 2) login as a previously registered username with the given password
686 3) login as a session list username with the given password
687 4) login as a previously validated user/password pair
688 5) login as the "user =" user with given password
689 6) login as the "user =" user with no password (guest connection)
690 7) login as guest user with no password
692 if the service is guest_only then steps 1 to 5 are skipped
695 if (GUEST_ONLY(snum)) *force = True;
697 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
700 user_struct *vuser = get_valid_user_struct(vuid);
702 /* check the given username and password */
703 if (!ok && (*user) && user_ok(user,snum)) {
704 ok = password_ok(user,password, pwlen, NULL);
705 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
708 /* check for a previously registered guest username */
709 if (!ok && (vuser != 0) && vuser->guest) {
710 if (user_ok(vuser->name,snum) &&
711 password_ok(vuser->name, password, pwlen, NULL)) {
712 fstrcpy(user, vuser->name);
713 vuser->guest = False;
714 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
720 /* now check the list of session users */
724 char *user_list = strdup(session_users);
725 if (!user_list) return(False);
727 for (auser=strtok(user_list,LIST_SEP);
729 auser = strtok(NULL,LIST_SEP))
732 fstrcpy(user2,auser);
733 if (!user_ok(user2,snum)) continue;
735 if (password_ok(user2,password, pwlen, NULL)) {
738 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
744 /* check for a previously validated username/password pair */
745 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
746 (vuser != 0) && !vuser->guest &&
747 user_ok(vuser->name,snum)) {
748 fstrcpy(user,vuser->name);
750 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
754 /* check for a rhosts entry */
755 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
757 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
760 /* check the user= fields and the given password */
761 if (!ok && lp_username(snum)) {
764 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
766 pstring_sub(user_list,"%S",lp_servicename(snum));
768 for (auser=strtok(user_list,LIST_SEP);
770 auser = strtok(NULL,LIST_SEP))
774 auser = validate_group(auser+1,password,pwlen,snum);
779 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
785 fstrcpy(user2,auser);
786 if (user_ok(user2,snum) &&
787 password_ok(user2,password,pwlen,NULL))
791 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
796 } /* not guest only */
798 /* check for a normal guest connection */
799 if (!ok && GUEST_OK(snum))
802 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
803 if (Get_Pwnam(guestname,True))
805 fstrcpy(user,guestname);
807 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
810 DEBUG(0,("Invalid guest account %s??\n",guestname));
815 if (ok && !user_ok(user,snum))
817 DEBUG(0,("rejected invalid user %s\n",user));
825 /****************************************************************************
826 read the a hosts.equiv or .rhosts file and check if it
827 allows this user from this machine
828 ****************************************************************************/
829 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
831 int plus_allowed = 1;
834 char **lines = file_lines_load(equiv_file, NULL);
837 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
838 if (! lines) return False;
839 for (i=0; lines[i]; i++) {
840 char *buf = lines[i];
841 trim_string(buf," "," ");
843 if (buf[0] != '#' && buf[0] != '\n')
845 BOOL is_group = False;
848 if (strcmp(buf, "NO_PLUS\n") == 0)
850 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
857 if (*bp == '\n' && plus_allowed)
859 /* a bare plus means everbody allowed */
860 DEBUG(6, ("check_user_equiv everybody allowed\n"));
861 file_lines_free(lines);
865 else if (buf[0] == '-')
875 file_host = strtok(bp, " \t\n");
876 file_user = strtok(NULL, " \t\n");
877 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
878 file_user ? file_user : "(null)" ));
879 if (file_host && *file_host)
881 BOOL host_ok = False;
883 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
886 static char *mydomain = NULL;
888 yp_get_default_domain(&mydomain);
889 if (mydomain && innetgr(file_host,remote,user,mydomain))
895 DEBUG(1,("Netgroups not configured\n"));
900 /* is it this host */
901 /* the fact that remote has come from a call of gethostbyaddr
902 * means that it may have the fully qualified domain name
903 * so we could look up the file version to get it into
904 * a canonical form, but I would rather just type it
905 * in full in the equiv file
907 if (!host_ok && !is_group && strequal(remote, file_host))
913 /* is it this user */
914 if (file_user == 0 || strequal(user, file_user))
916 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
917 (plus ? "+" : "-"), file_host,
918 (file_user ? file_user : "")));
919 file_lines_free(lines);
920 return (plus ? True : False);
926 file_lines_free(lines);
931 /****************************************************************************
932 check for a possible hosts equiv or rhosts entry for the user
933 ****************************************************************************/
934 BOOL check_hosts_equiv(char *user)
938 struct passwd *pass = Get_Pwnam(user,True);
943 fname = lp_hosts_equiv();
945 /* note: don't allow hosts.equiv on root */
946 if (fname && *fname && (pass->pw_uid != 0)) {
947 if (check_user_equiv(user,client_name(),fname))
953 char *home = get_user_home_dir(user);
955 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
956 if (check_user_equiv(user,client_name(),rhostsfile))
965 /****************************************************************************
966 Return the client state structure.
967 ****************************************************************************/
969 struct cli_state *server_client(void)
971 static struct cli_state pw_cli;
975 /****************************************************************************
976 Support for server level security.
977 ****************************************************************************/
979 struct cli_state *server_cryptkey(void)
981 struct cli_state *cli;
983 struct in_addr dest_ip;
985 BOOL connected_ok = False;
987 cli = server_client();
989 if (!cli_initialise(cli))
992 pserver = strdup(lp_passwordserver());
995 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
996 standard_sub_basic(desthost);
999 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1000 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1004 if (ismyip(dest_ip)) {
1005 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1009 if (cli_connect(cli, desthost, &dest_ip)) {
1010 DEBUG(3,("connected to password server %s\n",desthost));
1011 connected_ok = True;
1018 if (!connected_ok) {
1019 DEBUG(0,("password server not available\n"));
1024 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1027 DEBUG(3,("got session\n"));
1029 if (!cli_negprot(cli)) {
1030 DEBUG(1,("%s rejected the negprot\n",desthost));
1035 if (cli->protocol < PROTOCOL_LANMAN2 ||
1036 !(cli->sec_mode & 1)) {
1037 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1042 DEBUG(3,("password server OK\n"));
1047 /****************************************************************************
1048 Validate a password with the password server.
1049 ****************************************************************************/
1051 BOOL server_validate(char *user, char *domain,
1052 char *pass, int passlen,
1053 char *ntpass, int ntpasslen)
1055 struct cli_state *cli;
1056 static unsigned char badpass[24];
1057 static BOOL tested_password_server = False;
1058 static BOOL bad_password_server = False;
1060 cli = server_client();
1062 if (!cli->initialised) {
1063 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1068 memset(badpass, 0x1f, sizeof(badpass));
1070 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1072 * Very unlikely, our random bad password is the same as the users
1074 memset(badpass, badpass[0]+1, sizeof(badpass));
1078 * Attempt a session setup with a totally incorrect password.
1079 * If this succeeds with the guest bit *NOT* set then the password
1080 * server is broken and is not correctly setting the guest bit. We
1081 * need to detect this as some versions of NT4.x are broken. JRA.
1084 if(!tested_password_server) {
1085 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1086 (char *)badpass, sizeof(badpass), domain)) {
1089 * We connected to the password server so we
1090 * can say we've tested it.
1092 tested_password_server = True;
1094 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1095 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1096 with a bad password.\n", cli->desthost));
1097 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1098 use this machine as the password server.\n"));
1102 * Password server has the bug.
1104 bad_password_server = True;
1112 * We have already tested the password server.
1113 * Fail immediately if it has the bug.
1116 if(bad_password_server) {
1117 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1118 with a bad password.\n", cli->desthost));
1119 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1120 use this machine as the password server.\n"));
1126 * Now we know the password server will correctly set the guest bit, or is
1127 * not guest enabled, we can try with the real password.
1130 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1131 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1135 /* if logged in as guest then reject */
1136 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1137 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1147 /***********************************************************************
1148 Connect to a remote machine for domain security authentication
1149 given a name or IP address.
1150 ************************************************************************/
1152 static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine,
1153 unsigned char *trust_passwd)
1155 struct in_addr dest_ip;
1157 if(cli_initialise(pcli) == False) {
1158 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1162 standard_sub_basic(remote_machine);
1163 strupper(remote_machine);
1165 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1166 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1171 if (ismyip(dest_ip)) {
1172 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1178 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1179 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1180 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1185 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1186 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1187 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1191 pcli->protocol = PROTOCOL_NT1;
1193 if (!cli_negprot(pcli)) {
1194 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1195 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1200 if (pcli->protocol != PROTOCOL_NT1) {
1201 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1208 * Do an anonymous session setup.
1211 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1212 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1213 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1218 if (!(pcli->sec_mode & 1)) {
1219 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1225 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1226 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1227 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1233 * We now have an anonymous connection to IPC$ on the domain password server.
1237 * Even if the connect succeeds we need to setup the netlogon
1238 * pipe here. We do this as we may just have changed the domain
1239 * account password on the PDC and yet we may be talking to
1240 * a BDC that doesn't have this replicated yet. In this case
1241 * a successful connect to a DC needs to take the netlogon connect
1242 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1245 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1246 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1247 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1248 cli_nt_session_close(pcli);
1254 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1255 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1256 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1257 cli_nt_session_close(pcli);
1266 /***********************************************************************
1267 Utility function to attempt a connection to an IP address of a DC.
1268 ************************************************************************/
1270 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1275 * Ignore addresses we have already tried.
1278 if (ip_equal(ipzero, *ip))
1281 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1284 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1289 /***********************************************************************
1290 We have been asked to dynamcially determine the IP addresses of
1291 the PDC and BDC's for this DOMAIN, and query them in turn.
1292 ************************************************************************/
1293 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd)
1295 struct in_addr *ip_list = NULL;
1298 BOOL connected_ok = False;
1300 if (!get_dc_list(lp_workgroup(), &ip_list, &count))
1304 * Firstly try and contact a PDC/BDC who has the same
1305 * network address as any of our interfaces.
1307 for(i = 0; i < count; i++) {
1308 if(!is_local_net(ip_list[i]))
1311 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1314 ip_list[i] = ipzero; /* Tried and failed. */
1318 * Secondly try and contact a random PDC/BDC.
1321 i = (sys_random() % count);
1323 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1324 ip_list[i] = ipzero; /* Tried and failed. */
1328 * Finally go through the IP list in turn, ignoring any addresses
1329 * we have already tried.
1333 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1334 * Note that from a WINS server the #1 IP address is the PDC.
1336 for(i = 0; i < count; i++) {
1337 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1343 free((char *)ip_list);
1346 return connected_ok;
1351 /***********************************************************************
1352 Do the same as security=server, but using NT Domain calls and a session
1353 key from the machine password.
1354 ************************************************************************/
1356 BOOL domain_client_validate( char *user, char *domain,
1357 char *smb_apasswd, int smb_apasslen,
1358 char *smb_ntpasswd, int smb_ntpasslen,
1361 unsigned char local_challenge[8];
1362 unsigned char local_lm_response[24];
1363 unsigned char local_nt_reponse[24];
1364 unsigned char trust_passwd[16];
1365 fstring remote_machine;
1367 NET_ID_INFO_CTR ctr;
1368 NET_USER_INFO_3 info3;
1369 struct cli_state cli;
1371 BOOL connected_ok = False;
1373 if(user_exists != NULL)
1374 *user_exists = True; /* Only set false on a very specific error. */
1377 * Check that the requested domain is not our own machine name.
1378 * If it is, we should never check the PDC here, we use our own local
1382 if(strequal( domain, global_myname)) {
1383 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1388 * Next, check that the passwords given were encrypted.
1391 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1392 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1395 * Not encrypted - do so.
1398 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1399 generate_random_buffer( local_challenge, 8, False);
1400 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1401 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1404 smb_apasswd = (char *)local_lm_response;
1405 smb_ntpasswd = (char *)local_nt_reponse;
1409 * Encrypted - get the challenge we sent for these
1413 if (!last_challenge(local_challenge)) {
1414 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1420 * Get the machine account password.
1422 if (!trust_get_passwd( trust_passwd, global_myworkgroup, global_myname))
1428 * At this point, smb_apasswd points to the lanman response to
1429 * the challenge in local_challenge, and smb_ntpasswd points to
1430 * the NT response to the challenge in local_challenge. Ship
1431 * these over the secure channel to a domain controller and
1432 * see if they were valid.
1438 * Treat each name in the 'password server =' line as a potential
1439 * PDC/BDC. Contact each in turn and try and authenticate.
1442 pserver = strdup(lp_passwordserver());
1445 while (!connected_ok &&
1446 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1447 if(strequal(remote_machine, "*")) {
1448 connected_ok = find_connect_pdc(&cli, trust_passwd);
1450 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1456 if (!connected_ok) {
1457 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1462 /* We really don't care what LUID we give the user. */
1463 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1465 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1466 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1467 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1468 &ctr, &info3) == False) {
1471 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1472 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1473 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1474 cli_nt_session_close(&cli);
1478 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1479 *user_exists = False;
1485 * Here, if we really want it, we have lots of info about the user in info3.
1490 * We don't actually need to do this - plus it fails currently with
1491 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1495 if(cli_nt_logoff(&cli, &ctr) == False) {
1496 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1497 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1498 cli_nt_session_close(&cli);
1505 cli_nt_session_close(&cli);