4 Unix SMB/Netbios implementation.
6 Password and authentication handling
7 Copyright (C) Andrew Tridgell 1992-1998
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern int DEBUGLEVEL;
28 extern struct in_addr ipzero;
30 /* users from session setup */
31 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++) + sys_getpid() + tval.tv_sec;
59 v2 = (counter++) * sys_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 /****************************************************************************
116 Delete the SID list for this user.
117 ****************************************************************************/
119 static void delete_nt_token(NT_USER_TOKEN *token)
121 safe_free( token->user_sids );
125 /****************************************************************************
127 ****************************************************************************/
128 void invalidate_vuid(uint16 vuid)
130 user_struct *vuser = get_valid_user_struct(vuid);
135 vuser->uid = (uid_t)-1;
136 vuser->gid = (gid_t)-1;
138 /* same number of igroups as groups */
142 free((char *)vuser->groups);
144 vuser->groups = NULL;
146 delete_nt_token(&vuser->nt_user_token);
150 /****************************************************************************
151 return a validated username
152 ****************************************************************************/
153 char *validated_username(uint16 vuid)
155 user_struct *vuser = get_valid_user_struct(vuid);
158 return(vuser->user.unix_name);
161 /****************************************************************************
162 return a validated domain
163 ****************************************************************************/
164 char *validated_domain(uint16 vuid)
166 user_struct *vuser = get_valid_user_struct(vuid);
169 return(vuser->user.domain);
173 /****************************************************************************
174 Initialize the groups a user belongs to.
175 ****************************************************************************/
177 int initialize_groups(char *user, uid_t uid, gid_t gid)
179 if (initgroups(user,gid) == -1) {
180 DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
182 if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767) {
183 DEBUG(0,("This is probably a problem with the account %s\n", user));
191 /****************************************************************************
192 Create the SID list for this user.
193 ****************************************************************************/
195 void setup_nt_token(NT_USER_TOKEN *token, uid_t uid, gid_t gid, int ngroups, gid_t *groups)
202 if ((token->user_sids = (DOM_SID *)malloc( (ngroups + 2)*sizeof(DOM_SID))) == NULL)
205 psids = token->user_sids;
207 token->num_sids = ngroups + 2;
209 uid_to_sid( &psids[0], uid);
210 gid_to_sid( &psids[1], gid);
212 for (i = 0; i < ngroups; i++)
213 gid_to_sid( &psids[i+2], groups[i]);
216 /****************************************************************************
217 register a uid/name pair as being valid and that a valid password
218 has been given. vuid is biased by an offset. This allows us to
219 tell random client vuid's (normally zero) from valid vuids.
220 ****************************************************************************/
222 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
223 char *domain,BOOL guest)
226 struct passwd *pwfile; /* for getting real name from passwd file */
228 /* Ensure no vuid gets registered in share level security. */
229 if(lp_security() == SEC_SHARE)
230 return UID_FIELD_INVALID;
232 validated_users = (user_struct *)Realloc(validated_users,
234 (num_validated_users+1));
236 if (!validated_users) {
237 DEBUG(0,("Failed to realloc users struct!\n"));
238 num_validated_users = 0;
239 return UID_FIELD_INVALID;
242 vuser = &validated_users[num_validated_users];
243 num_validated_users++;
247 vuser->guest = guest;
248 fstrcpy(vuser->user.unix_name,unix_name);
249 fstrcpy(vuser->user.smb_name,requested_name);
250 fstrcpy(vuser->user.domain,domain);
253 vuser->groups = NULL;
255 /* Find all the groups this uid is in and store them.
256 Used by become_user() */
257 initialize_groups(unix_name, uid, gid);
258 get_current_groups( &vuser->n_groups, &vuser->groups);
260 /* Create an NT_USER_TOKEN struct for this user. */
261 setup_nt_token(&vuser->nt_user_token, uid,gid, vuser->n_groups, vuser->groups);
263 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
265 DEBUG(3, ("Clearing default real name\n"));
266 fstrcpy(vuser->user.full_name, "<Full Name>");
267 if (lp_unix_realname()) {
268 if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL) {
269 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos));
270 fstrcpy(vuser->user.full_name, pwfile->pw_gecos);
274 memset(&vuser->dc, '\0', sizeof(vuser->dc));
276 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
280 /****************************************************************************
281 add a name to the session users list
282 ****************************************************************************/
283 void add_session_user(char *user)
286 StrnCpy(suser,user,sizeof(suser)-1);
288 if (!Get_Pwnam(suser,True)) return;
290 if (suser && *suser && !in_list(suser,session_users,False))
292 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
293 DEBUG(1,("Too many session users??\n"));
296 pstrcat(session_users," ");
297 pstrcat(session_users,suser);
303 /****************************************************************************
304 update the encrypted smbpasswd file from the plaintext username and password
305 *****************************************************************************/
306 static BOOL update_smbpassword_file(char *user, char *password)
308 struct smb_passwd *smbpw;
312 smbpw = getsmbpwnam(user);
316 DEBUG(0,("getsmbpwnam returned NULL\n"));
321 * Remove the account disabled flag - we are updating the
322 * users password from a login.
324 smbpw->acct_ctrl &= ~ACB_DISABLED;
326 /* Here, the flag is one, because we want to ignore the
327 XXXXXXX'd out password */
328 ret = change_oem_password( smbpw, password, True);
330 DEBUG(3,("change_oem_password returned False\n"));
340 /****************************************************************************
341 core of smb password checking routine.
342 ****************************************************************************/
343 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
345 /* Finish the encryption of part_passwd. */
346 unsigned char p21[21];
347 unsigned char p24[24];
349 if (part_passwd == NULL)
350 DEBUG(10,("No password set - allowing access\n"));
351 /* No password set - always true ! */
352 if (part_passwd == NULL)
356 memcpy(p21,part_passwd,16);
361 DEBUG(100,("Part password (P16) was |"));
362 for(i = 0; i < 16; i++)
363 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
365 DEBUG(100,("Password from client was |"));
366 for(i = 0; i < 24; i++)
367 DEBUG(100,("%X ", (unsigned char)password[i]));
369 DEBUG(100,("Given challenge was |"));
370 for(i = 0; i < 8; i++)
371 DEBUG(100,("%X ", (unsigned char)c8[i]));
373 DEBUG(100,("Value from encryption was |"));
374 for(i = 0; i < 24; i++)
375 DEBUG(100,("%X ", (unsigned char)p24[i]));
379 return (memcmp(p24, password, 24) == 0);
382 /****************************************************************************
383 Do a specific test for an smb password being correct, given a smb_password and
384 the lanman and NT responses.
385 ****************************************************************************/
386 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],
387 uchar lm_pass[24], uchar nt_pass[24])
391 if (!lm_pass || !smb_pass) return(False);
393 DEBUG(4,("Checking SMB password for user %s\n",
394 smb_pass->smb_name));
396 if(smb_pass->acct_ctrl & ACB_DISABLED) {
397 DEBUG(1,("account for user %s was disabled.\n",
398 smb_pass->smb_name));
404 DEBUG(5,("use last SMBnegprot challenge\n"));
405 if (!last_challenge(challenge))
407 DEBUG(1,("no challenge done - password failed\n"));
413 DEBUG(5,("challenge received\n"));
414 memcpy(challenge, chal, 8);
417 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
418 /* We have the NT MD4 hash challenge available - see if we can
419 use it (ie. does it exist in the smbpasswd file).
421 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
422 if (smb_password_check((char *)nt_pass,
423 (uchar *)smb_pass->smb_nt_passwd,
425 DEBUG(4,("NT MD4 password check succeeded\n"));
428 DEBUG(4,("NT MD4 password check failed\n"));
431 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
432 no password, allow access. */
434 DEBUG(4,("Checking LM MD4 password\n"));
436 if((smb_pass->smb_passwd == NULL) &&
437 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
438 DEBUG(4,("no password required for user %s\n",
439 smb_pass->smb_name));
443 if((smb_pass->smb_passwd != NULL) &&
444 smb_password_check((char *)lm_pass,
445 (uchar *)smb_pass->smb_passwd, challenge)) {
446 DEBUG(4,("LM MD4 password check succeeded\n"));
450 DEBUG(4,("LM MD4 password check failed\n"));
456 /****************************************************************************
457 check if a username/password is OK assuming the password is a 24 byte
459 return True if the password is correct, False otherwise
460 ****************************************************************************/
462 BOOL pass_check_smb(char *user, char *domain,
463 uchar *chal, uchar *lm_pwd, uchar *nt_pwd,
467 struct smb_passwd *smb_pass;
469 if (!lm_pwd || !nt_pwd)
474 if (pwd != NULL && user == NULL)
476 pass = (struct passwd *) pwd;
477 user = pass->pw_name;
481 pass = smb_getpwnam(user,True);
486 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
490 smb_pass = getsmbpwnam(user);
492 if (smb_pass == NULL)
494 DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user));
498 /* Quit if the account was disabled. */
499 if(smb_pass->acct_ctrl & ACB_DISABLED) {
500 DEBUG(1,("Account for user '%s' was disabled.\n", user));
504 /* Ensure the uid's match */
505 if (smb_pass->smb_userid != pass->pw_uid)
507 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
511 if (lm_pwd[0] == '\0' && (smb_pass->acct_ctrl & ACB_PWNOTREQ) && lp_null_passwords())
513 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", smb_pass->smb_name));
517 if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd))
522 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
526 /****************************************************************************
527 check if a username/password pair is OK either via the system password
528 database or the encrypted SMB password database
529 return True if the password is correct, False otherwise
530 ****************************************************************************/
531 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
533 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
535 /* if 24 bytes long assume it is an encrypted password */
538 if (!last_challenge(challenge))
540 DEBUG(0,("Error: challenge not done for user=%s\n", user));
544 return pass_check_smb(user, global_myworkgroup,
545 challenge, (uchar *)password, (uchar *)password, pwd);
548 return pass_check(user, password, pwlen, pwd,
549 lp_update_encrypted() ?
550 update_smbpassword_file : NULL);
553 /****************************************************************************
554 check if a username is valid
555 ****************************************************************************/
556 BOOL user_ok(char *user,int snum)
558 pstring valid, invalid;
561 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
562 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
564 pstring_sub(valid,"%S",lp_servicename(snum));
565 pstring_sub(invalid,"%S",lp_servicename(snum));
567 ret = !user_in_list(user,invalid);
569 if (ret && valid && *valid) {
570 ret = user_in_list(user,valid);
573 if (ret && lp_onlyuser(snum)) {
574 char *user_list = lp_username(snum);
575 pstring_sub(user_list,"%S",lp_servicename(snum));
576 ret = user_in_list(user,user_list);
585 /****************************************************************************
586 validate a group username entry. Return the username or NULL
587 ****************************************************************************/
588 static char *validate_group(char *group,char *password,int pwlen,int snum)
592 char *host, *user, *domain;
594 while (getnetgrent(&host, &user, &domain)) {
596 if (user_ok(user, snum) &&
597 password_ok(user,password,pwlen,NULL)) {
611 while ((gptr = (struct group *)getgrent())) {
612 if (strequal(gptr->gr_name,group))
617 * As user_ok can recurse doing a getgrent(), we must
618 * copy the member list into a pstring on the stack before
619 * use. Bug pointed out by leon@eatworms.swmed.edu.
625 size_t copied_len = 0;
629 member = member_list;
631 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
632 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
633 if( copied_len + member_len < sizeof(pstring)) {
635 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
637 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
638 copied_len += member_len;
639 member += copied_len;
647 member = member_list;
650 fstrcpy(name,member);
651 if (user_ok(name,snum) &&
652 password_ok(name,password,pwlen,NULL)) {
657 DEBUG(10,("validate_group = member = %s\n", member));
659 member += strlen(member) + 1;
672 /****************************************************************************
673 check for authority to login to a service with a given username/password
674 ****************************************************************************/
675 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
676 BOOL *guest,BOOL *force,uint16 vuid)
683 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
686 /* there are several possibilities:
687 1) login as the given user with given password
688 2) login as a previously registered username with the given password
689 3) login as a session list username with the given password
690 4) login as a previously validated user/password pair
691 5) login as the "user =" user with given password
692 6) login as the "user =" user with no password (guest connection)
693 7) login as guest user with no password
695 if the service is guest_only then steps 1 to 5 are skipped
698 if (GUEST_ONLY(snum)) *force = True;
700 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
703 user_struct *vuser = get_valid_user_struct(vuid);
705 /* check the given username and password */
706 if (!ok && (*user) && user_ok(user,snum)) {
707 ok = password_ok(user,password, pwlen, NULL);
708 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
711 /* check for a previously registered guest username */
712 if (!ok && (vuser != 0) && vuser->guest) {
713 if (user_ok(vuser->user.unix_name,snum) &&
714 password_ok(vuser->user.unix_name, password, pwlen, NULL)) {
715 fstrcpy(user, vuser->user.unix_name);
716 vuser->guest = False;
717 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
723 /* now check the list of session users */
727 char *user_list = strdup(session_users);
728 if (!user_list) return(False);
730 for (auser=strtok(user_list,LIST_SEP);
732 auser = strtok(NULL,LIST_SEP))
735 fstrcpy(user2,auser);
736 if (!user_ok(user2,snum)) continue;
738 if (password_ok(user2,password, pwlen, NULL)) {
741 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
747 /* check for a previously validated username/password pair */
748 if (!ok && (lp_security() > SEC_SHARE) &&
749 (vuser != 0) && !vuser->guest &&
750 user_ok(vuser->user.unix_name,snum)) {
751 fstrcpy(user,vuser->user.unix_name);
753 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
757 /* check for a rhosts entry */
758 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
760 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
763 /* check the user= fields and the given password */
764 if (!ok && lp_username(snum)) {
767 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
769 pstring_sub(user_list,"%S",lp_servicename(snum));
771 for (auser=strtok(user_list,LIST_SEP);
773 auser = strtok(NULL,LIST_SEP))
777 auser = validate_group(auser+1,password,pwlen,snum);
782 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
788 fstrcpy(user2,auser);
789 if (user_ok(user2,snum) &&
790 password_ok(user2,password,pwlen,NULL))
794 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
799 } /* not guest only */
801 /* check for a normal guest connection */
802 if (!ok && GUEST_OK(snum))
805 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
806 if (Get_Pwnam(guestname,True))
808 fstrcpy(user,guestname);
810 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
813 DEBUG(0,("Invalid guest account %s??\n",guestname));
818 if (ok && !user_ok(user,snum))
820 DEBUG(0,("rejected invalid user %s\n",user));
828 /****************************************************************************
829 read the a hosts.equiv or .rhosts file and check if it
830 allows this user from this machine
831 ****************************************************************************/
832 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
834 int plus_allowed = 1;
837 char **lines = file_lines_load(equiv_file, NULL);
840 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
841 if (! lines) return False;
842 for (i=0; lines[i]; i++) {
843 char *buf = lines[i];
844 trim_string(buf," "," ");
846 if (buf[0] != '#' && buf[0] != '\n')
848 BOOL is_group = False;
851 if (strcmp(buf, "NO_PLUS\n") == 0)
853 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
860 if (*bp == '\n' && plus_allowed)
862 /* a bare plus means everbody allowed */
863 DEBUG(6, ("check_user_equiv everybody allowed\n"));
864 file_lines_free(lines);
868 else if (buf[0] == '-')
878 file_host = strtok(bp, " \t\n");
879 file_user = strtok(NULL, " \t\n");
880 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
881 file_user ? file_user : "(null)" ));
882 if (file_host && *file_host)
884 BOOL host_ok = False;
886 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
889 static char *mydomain = NULL;
891 yp_get_default_domain(&mydomain);
892 if (mydomain && innetgr(file_host,remote,user,mydomain))
898 DEBUG(1,("Netgroups not configured\n"));
903 /* is it this host */
904 /* the fact that remote has come from a call of gethostbyaddr
905 * means that it may have the fully qualified domain name
906 * so we could look up the file version to get it into
907 * a canonical form, but I would rather just type it
908 * in full in the equiv file
910 if (!host_ok && !is_group && strequal(remote, file_host))
916 /* is it this user */
917 if (file_user == 0 || strequal(user, file_user))
919 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
920 (plus ? "+" : "-"), file_host,
921 (file_user ? file_user : "")));
922 file_lines_free(lines);
923 return (plus ? True : False);
929 file_lines_free(lines);
934 /****************************************************************************
935 check for a possible hosts equiv or rhosts entry for the user
936 ****************************************************************************/
937 BOOL check_hosts_equiv(char *user)
941 struct passwd *pass = Get_Pwnam(user,True);
946 fname = lp_hosts_equiv();
948 /* note: don't allow hosts.equiv on root */
949 if (fname && *fname && (pass->pw_uid != 0)) {
950 if (check_user_equiv(user,client_name(),fname))
956 char *home = get_user_home_dir(user);
958 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
959 if (check_user_equiv(user,client_name(),rhostsfile))
968 /****************************************************************************
969 Return the client state structure.
970 ****************************************************************************/
972 struct cli_state *server_client(void)
974 static struct cli_state pw_cli;
978 /****************************************************************************
979 Support for server level security.
980 ****************************************************************************/
982 struct cli_state *server_cryptkey(void)
984 struct cli_state *cli;
986 struct in_addr dest_ip;
988 BOOL connected_ok = False;
990 cli = server_client();
992 if (!cli_initialise(cli))
995 pserver = strdup(lp_passwordserver());
998 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
999 standard_sub_basic(desthost);
1002 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1003 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1007 if (ismyip(dest_ip)) {
1008 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1012 if (cli_connect(cli, desthost, &dest_ip)) {
1013 DEBUG(3,("connected to password server %s\n",desthost));
1014 connected_ok = True;
1021 if (!connected_ok) {
1022 DEBUG(0,("password server not available\n"));
1027 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1030 DEBUG(3,("got session\n"));
1032 if (!cli_negprot(cli)) {
1033 DEBUG(1,("%s rejected the negprot\n",desthost));
1038 if (cli->protocol < PROTOCOL_LANMAN2 ||
1039 !(cli->sec_mode & 1)) {
1040 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1045 DEBUG(3,("password server OK\n"));
1050 /****************************************************************************
1051 Validate a password with the password server.
1052 ****************************************************************************/
1054 BOOL server_validate(char *user, char *domain,
1055 char *pass, int passlen,
1056 char *ntpass, int ntpasslen)
1058 struct cli_state *cli;
1059 static unsigned char badpass[24];
1060 static BOOL tested_password_server = False;
1061 static BOOL bad_password_server = False;
1063 cli = server_client();
1065 if (!cli->initialised) {
1066 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1071 memset(badpass, 0x1f, sizeof(badpass));
1073 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1075 * Very unlikely, our random bad password is the same as the users
1077 memset(badpass, badpass[0]+1, sizeof(badpass));
1081 * Attempt a session setup with a totally incorrect password.
1082 * If this succeeds with the guest bit *NOT* set then the password
1083 * server is broken and is not correctly setting the guest bit. We
1084 * need to detect this as some versions of NT4.x are broken. JRA.
1087 if(!tested_password_server) {
1088 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1089 (char *)badpass, sizeof(badpass), domain)) {
1092 * We connected to the password server so we
1093 * can say we've tested it.
1095 tested_password_server = True;
1097 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1098 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1099 with a bad password.\n", cli->desthost));
1100 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1101 use this machine as the password server.\n"));
1105 * Password server has the bug.
1107 bad_password_server = True;
1115 * We have already tested the password server.
1116 * Fail immediately if it has the bug.
1119 if(bad_password_server) {
1120 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1121 with a bad password.\n", cli->desthost));
1122 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1123 use this machine as the password server.\n"));
1129 * Now we know the password server will correctly set the guest bit, or is
1130 * not guest enabled, we can try with the real password.
1133 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1134 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1138 /* if logged in as guest then reject */
1139 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1140 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1150 /***********************************************************************
1151 Connect to a remote machine for domain security authentication
1152 given a name or IP address.
1153 ************************************************************************/
1155 static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine,
1156 unsigned char *trust_passwd)
1158 struct in_addr dest_ip;
1160 if(cli_initialise(pcli) == False) {
1161 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1165 standard_sub_basic(remote_machine);
1166 strupper(remote_machine);
1168 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1169 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1174 if (ismyip(dest_ip)) {
1175 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1181 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1182 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1183 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1188 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1189 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1190 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1194 pcli->protocol = PROTOCOL_NT1;
1196 if (!cli_negprot(pcli)) {
1197 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1198 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1203 if (pcli->protocol != PROTOCOL_NT1) {
1204 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1211 * Do an anonymous session setup.
1214 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1215 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1216 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1221 if (!(pcli->sec_mode & 1)) {
1222 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1228 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1229 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1230 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1236 * We now have an anonymous connection to IPC$ on the domain password server.
1240 * Even if the connect succeeds we need to setup the netlogon
1241 * pipe here. We do this as we may just have changed the domain
1242 * account password on the PDC and yet we may be talking to
1243 * a BDC that doesn't have this replicated yet. In this case
1244 * a successful connect to a DC needs to take the netlogon connect
1245 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1248 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1249 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1250 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1251 cli_nt_session_close(pcli);
1257 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1258 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1259 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1260 cli_nt_session_close(pcli);
1269 /***********************************************************************
1270 Utility function to attempt a connection to an IP address of a DC.
1271 ************************************************************************/
1273 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1278 * Ignore addresses we have already tried.
1281 if (ip_equal(ipzero, *ip))
1284 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1287 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1292 /***********************************************************************
1293 We have been asked to dynamcially determine the IP addresses of
1294 the PDC and BDC's for this DOMAIN, and query them in turn.
1295 ************************************************************************/
1296 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd)
1298 struct in_addr *ip_list = NULL;
1301 BOOL connected_ok = False;
1303 if (!get_dc_list(lp_workgroup(), &ip_list, &count))
1307 * Firstly try and contact a PDC/BDC who has the same
1308 * network address as any of our interfaces.
1310 for(i = 0; i < count; i++) {
1311 if(!is_local_net(ip_list[i]))
1314 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1317 ip_list[i] = ipzero; /* Tried and failed. */
1321 * Secondly try and contact a random PDC/BDC.
1324 i = (sys_random() % count);
1326 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1327 ip_list[i] = ipzero; /* Tried and failed. */
1331 * Finally go through the IP list in turn, ignoring any addresses
1332 * we have already tried.
1336 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1337 * Note that from a WINS server the #1 IP address is the PDC.
1339 for(i = 0; i < count; i++) {
1340 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1346 free((char *)ip_list);
1349 return connected_ok;
1354 /***********************************************************************
1355 Do the same as security=server, but using NT Domain calls and a session
1356 key from the machine password.
1357 ************************************************************************/
1359 BOOL domain_client_validate( char *user, char *domain,
1360 char *smb_apasswd, int smb_apasslen,
1361 char *smb_ntpasswd, int smb_ntpasslen,
1364 unsigned char local_challenge[8];
1365 unsigned char local_lm_response[24];
1366 unsigned char local_nt_response[24];
1367 unsigned char trust_passwd[16];
1368 fstring remote_machine;
1370 NET_ID_INFO_CTR ctr;
1371 NET_USER_INFO_3 info3;
1372 struct cli_state cli;
1374 BOOL connected_ok = False;
1376 if(user_exists != NULL)
1377 *user_exists = True; /* Only set false on a very specific error. */
1380 * Check that the requested domain is not our own machine name.
1381 * If it is, we should never check the PDC here, we use our own local
1385 if(strequal( domain, global_myname)) {
1386 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1391 * Next, check that the passwords given were encrypted.
1394 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1395 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1398 * Not encrypted - do so.
1401 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1402 generate_random_buffer( local_challenge, 8, False);
1403 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1404 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_response);
1407 smb_apasswd = (char *)local_lm_response;
1408 smb_ntpasswd = (char *)local_nt_response;
1412 * Encrypted - get the challenge we sent for these
1416 if (!last_challenge(local_challenge)) {
1417 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1423 * Get the machine account password for our primary domain
1425 if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, NULL))
1431 * At this point, smb_apasswd points to the lanman response to
1432 * the challenge in local_challenge, and smb_ntpasswd points to
1433 * the NT response to the challenge in local_challenge. Ship
1434 * these over the secure channel to a domain controller and
1435 * see if they were valid.
1441 * Treat each name in the 'password server =' line as a potential
1442 * PDC/BDC. Contact each in turn and try and authenticate.
1445 pserver = lp_passwordserver();
1446 if (! *pserver) pserver = "*";
1449 while (!connected_ok &&
1450 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1451 if(strequal(remote_machine, "*")) {
1452 connected_ok = find_connect_pdc(&cli, trust_passwd);
1454 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1458 if (!connected_ok) {
1459 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1464 /* We really don't care what LUID we give the user. */
1465 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1469 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1470 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1471 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1472 &ctr, &info3) == False) {
1475 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1476 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1477 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1478 cli_nt_session_close(&cli);
1482 /* unused, so delete here. */
1483 if (info3.gids != NULL)
1486 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1487 *user_exists = False;
1492 /* unused, so delete here. */
1493 if (info3.gids != NULL)
1496 * Here, if we really want it, we have lots of info about the user in info3.
1501 * We don't actually need to do this - plus it fails currently with
1502 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1506 if(cli_nt_logoff(&cli, &ctr) == False) {
1507 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1508 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1509 cli_nt_session_close(&cli);
1516 cli_nt_session_close(&cli);