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++) + sys_getpid() + tval.tv_sec;
57 v2 = (counter++) * sys_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);
143 return(vuser->user.unix_name);
146 /****************************************************************************
147 return a validated domain
148 ****************************************************************************/
149 char *validated_domain(uint16 vuid)
151 user_struct *vuser = get_valid_user_struct(vuid);
154 return(vuser->user.domain);
158 /****************************************************************************
159 Setup the groups a user belongs to.
160 ****************************************************************************/
161 int setup_groups(char *user, char *domain,
162 uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
166 gid_t *groups = NULL;
168 if (-1 == smb_initgroups(user,domain,gid))
170 DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
173 if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767)
175 DEBUG(0,("This is probably a problem with the account %s\n", user));
181 ngroups = sys_getgroups(0,&grp);
184 ngroups = groups_max();
187 if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
189 DEBUG(0,("setup_groups malloc fail !\n"));
193 ngroups = sys_getgroups(ngroups,groups);
195 (*p_ngroups) = ngroups;
196 (*p_groups) = groups;
198 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
199 for (i = 0; i < ngroups; i++ )
201 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
203 DEBUG( 3, ( "\n" ) );
209 /****************************************************************************
210 register a uid/name pair as being valid and that a valid password
211 has been given. vuid is biased by an offset. This allows us to
212 tell random client vuid's (normally zero) from valid vuids.
213 ****************************************************************************/
214 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
215 char *domain,BOOL guest)
218 struct passwd *pwfile; /* for getting real name from passwd file */
220 /* Ensure no vuid gets registered in share level security. */
221 if(lp_security() == SEC_SHARE)
222 return UID_FIELD_INVALID;
226 * After observing MS-Exchange services writing to a Samba share
227 * I belive this code is incorrect. Each service does its own
228 * sessionsetup_and_X for the same user, and as each service shuts
229 * down, it does a user_logoff_and_X. As we are consolidating multiple
230 * sessionsetup_and_X's onto the same vuid here, when the first service
231 * shuts down, it invalidates all the open files for the other services.
232 * Hence I am removing this code and forcing each sessionsetup_and_X
234 * Jeremy Allison. (jallison@whistle.com).
238 for(i = 0; i < num_validated_users; i++) {
239 vuser = &validated_users[i];
240 if ( vuser->uid == uid )
241 return (uint16)(i + VUID_OFFSET); /* User already validated */
245 validated_users = (user_struct *)Realloc(validated_users,
247 (num_validated_users+1));
249 if (!validated_users)
251 DEBUG(0,("Failed to realloc users struct!\n"));
252 num_validated_users = 0;
253 return UID_FIELD_INVALID;
256 vuser = &validated_users[num_validated_users];
257 num_validated_users++;
261 vuser->guest = guest;
262 fstrcpy(vuser->user.unix_name,unix_name);
263 fstrcpy(vuser->user.smb_name,requested_name);
264 fstrcpy(vuser->user.domain,domain);
267 vuser->groups = NULL;
269 /* Find all the groups this uid is in and store them.
270 Used by become_user() */
271 setup_groups(unix_name,domain,uid,gid,
275 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
277 DEBUG(3, ("Clearing default real name\n"));
278 fstrcpy(vuser->user.full_name, "<Full Name>");
279 if (lp_unix_realname()) {
280 if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL)
282 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos));
283 fstrcpy(vuser->user.full_name, pwfile->pw_gecos);
287 memset(&vuser->dc, '\0', sizeof(vuser->dc));
289 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
293 /****************************************************************************
294 add a name to the session users list
295 ****************************************************************************/
296 void add_session_user(char *user)
299 StrnCpy(suser,user,sizeof(suser)-1);
301 if (!Get_Pwnam(suser,True)) return;
303 if (suser && *suser && !in_list(suser,session_users,False))
305 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
306 DEBUG(1,("Too many session users??\n"));
309 pstrcat(session_users," ");
310 pstrcat(session_users,suser);
316 /****************************************************************************
317 update the encrypted smbpasswd file from the plaintext username and password
318 *****************************************************************************/
319 static BOOL update_smbpassword_file(char *user, char *password)
321 struct smb_passwd *smbpw;
325 smbpw = getsmbpwnam(user);
329 DEBUG(0,("getsmbpwnam returned NULL\n"));
334 * Remove the account disabled flag - we are updating the
335 * users password from a login.
337 smbpw->acct_ctrl &= ~ACB_DISABLED;
339 /* Here, the flag is one, because we want to ignore the
340 XXXXXXX'd out password */
341 ret = change_oem_password( smbpw, password, True);
343 DEBUG(3,("change_oem_password returned False\n"));
353 /****************************************************************************
354 core of smb password checking routine.
355 ****************************************************************************/
356 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
358 /* Finish the encryption of part_passwd. */
359 unsigned char p21[21];
360 unsigned char p24[24];
362 if (part_passwd == NULL)
363 DEBUG(10,("No password set - allowing access\n"));
364 /* No password set - always true ! */
365 if (part_passwd == NULL)
369 memcpy(p21,part_passwd,16);
374 DEBUG(100,("Part password (P16) was |"));
375 for(i = 0; i < 16; i++)
376 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
378 DEBUG(100,("Password from client was |"));
379 for(i = 0; i < 24; i++)
380 DEBUG(100,("%X ", (unsigned char)password[i]));
382 DEBUG(100,("Given challenge was |"));
383 for(i = 0; i < 8; i++)
384 DEBUG(100,("%X ", (unsigned char)c8[i]));
386 DEBUG(100,("Value from encryption was |"));
387 for(i = 0; i < 24; i++)
388 DEBUG(100,("%X ", (unsigned char)p24[i]));
392 return (memcmp(p24, password, 24) == 0);
395 /****************************************************************************
396 Do a specific test for an smb password being correct, given a smb_password and
397 the lanman and NT responses.
398 ****************************************************************************/
399 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],
400 uchar lm_pass[24], uchar nt_pass[24])
404 if (!lm_pass || !smb_pass) return(False);
406 DEBUG(4,("Checking SMB password for user %s\n",
407 smb_pass->smb_name));
409 if(smb_pass->acct_ctrl & ACB_DISABLED) {
410 DEBUG(1,("account for user %s was disabled.\n",
411 smb_pass->smb_name));
417 DEBUG(5,("use last SMBnegprot challenge\n"));
418 if (!last_challenge(challenge))
420 DEBUG(1,("no challenge done - password failed\n"));
426 DEBUG(5,("challenge received\n"));
427 memcpy(challenge, chal, 8);
430 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
431 /* We have the NT MD4 hash challenge available - see if we can
432 use it (ie. does it exist in the smbpasswd file).
434 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
435 if (smb_password_check((char *)nt_pass,
436 (uchar *)smb_pass->smb_nt_passwd,
438 DEBUG(4,("NT MD4 password check succeeded\n"));
441 DEBUG(4,("NT MD4 password check failed\n"));
444 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
445 no password, allow access. */
447 DEBUG(4,("Checking LM MD4 password\n"));
449 if((smb_pass->smb_passwd == NULL) &&
450 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
451 DEBUG(4,("no password required for user %s\n",
452 smb_pass->smb_name));
456 if((smb_pass->smb_passwd != NULL) &&
457 smb_password_check((char *)lm_pass,
458 (uchar *)smb_pass->smb_passwd, challenge)) {
459 DEBUG(4,("LM MD4 password check succeeded\n"));
463 DEBUG(4,("LM MD4 password check failed\n"));
469 /****************************************************************************
470 check if a username/password is OK assuming the password is a 24 byte
472 return True if the password is correct, False otherwise
473 ****************************************************************************/
475 BOOL pass_check_smb(char *user, char *domain,
476 uchar *chal, uchar *lm_pwd, uchar *nt_pwd,
480 struct smb_passwd *smb_pass;
482 if (!lm_pwd || !nt_pwd)
487 if (pwd != NULL && user == NULL)
489 pass = (struct passwd *) pwd;
490 user = pass->pw_name;
494 pass = smb_getpwnam(user,domain,True);
499 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
503 smb_pass = getsmbpwnam(user);
505 if (smb_pass == NULL)
507 DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user));
511 /* Quit if the account was disabled. */
512 if(smb_pass->acct_ctrl & ACB_DISABLED) {
513 DEBUG(1,("Account for user '%s' was disabled.\n", user));
517 /* Ensure the uid's match */
518 if (smb_pass->smb_userid != pass->pw_uid)
520 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
524 if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
526 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", smb_pass->smb_name));
530 if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd))
535 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
539 /****************************************************************************
540 check if a username/password pair is OK either via the system password
541 database or the encrypted SMB password database
542 return True if the password is correct, False otherwise
543 ****************************************************************************/
544 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
546 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
548 /* if 24 bytes long assume it is an encrypted password */
551 if (!last_challenge(challenge))
553 DEBUG(0,("Error: challenge not done for user=%s\n", user));
557 return pass_check_smb(user, global_myworkgroup,
558 challenge, (uchar *)password, (uchar *)password, pwd);
561 return pass_check(user, password, pwlen, pwd,
562 lp_update_encrypted() ?
563 update_smbpassword_file : NULL);
566 /****************************************************************************
567 check if a username is valid
568 ****************************************************************************/
569 BOOL user_ok(char *user,int snum)
571 pstring valid, invalid;
574 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
575 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
577 pstring_sub(valid,"%S",lp_servicename(snum));
578 pstring_sub(invalid,"%S",lp_servicename(snum));
580 ret = !user_in_list(user,invalid);
582 if (ret && valid && *valid) {
583 ret = user_in_list(user,valid);
586 if (ret && lp_onlyuser(snum)) {
587 char *user_list = lp_username(snum);
588 pstring_sub(user_list,"%S",lp_servicename(snum));
589 ret = user_in_list(user,user_list);
598 /****************************************************************************
599 validate a group username entry. Return the username or NULL
600 ****************************************************************************/
601 static char *validate_group(char *group,char *password,int pwlen,int snum)
605 char *host, *user, *domain;
607 while (getnetgrent(&host, &user, &domain)) {
609 if (user_ok(user, snum) &&
610 password_ok(user,password,pwlen,NULL)) {
624 while ((gptr = (struct group *)getgrent())) {
625 if (strequal(gptr->gr_name,group))
630 * As user_ok can recurse doing a getgrent(), we must
631 * copy the member list into a pstring on the stack before
632 * use. Bug pointed out by leon@eatworms.swmed.edu.
638 size_t copied_len = 0;
642 member = member_list;
644 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
645 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
646 if( copied_len + member_len < sizeof(pstring)) {
648 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
650 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
651 copied_len += member_len;
652 member += copied_len;
660 member = member_list;
663 fstrcpy(name,member);
664 if (user_ok(name,snum) &&
665 password_ok(name,password,pwlen,NULL)) {
670 DEBUG(10,("validate_group = member = %s\n", member));
672 member += strlen(member) + 1;
685 /****************************************************************************
686 check for authority to login to a service with a given username/password
687 ****************************************************************************/
688 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
689 BOOL *guest,BOOL *force,uint16 vuid)
696 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
699 /* there are several possibilities:
700 1) login as the given user with given password
701 2) login as a previously registered username with the given password
702 3) login as a session list username with the given password
703 4) login as a previously validated user/password pair
704 5) login as the "user =" user with given password
705 6) login as the "user =" user with no password (guest connection)
706 7) login as guest user with no password
708 if the service is guest_only then steps 1 to 5 are skipped
711 if (GUEST_ONLY(snum)) *force = True;
713 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
716 user_struct *vuser = get_valid_user_struct(vuid);
718 /* check the given username and password */
719 if (!ok && (*user) && user_ok(user,snum)) {
720 ok = password_ok(user,password, pwlen, NULL);
721 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
724 /* check for a previously registered guest username */
725 if (!ok && (vuser != 0) && vuser->guest) {
726 if (user_ok(vuser->user.unix_name,snum) &&
727 password_ok(vuser->user.unix_name, password, pwlen, NULL)) {
728 fstrcpy(user, vuser->user.unix_name);
729 vuser->guest = False;
730 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
736 /* now check the list of session users */
740 char *user_list = strdup(session_users);
741 if (!user_list) return(False);
743 for (auser=strtok(user_list,LIST_SEP);
745 auser = strtok(NULL,LIST_SEP))
748 fstrcpy(user2,auser);
749 if (!user_ok(user2,snum)) continue;
751 if (password_ok(user2,password, pwlen, NULL)) {
754 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
760 /* check for a previously validated username/password pair */
761 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
762 (vuser != 0) && !vuser->guest &&
763 user_ok(vuser->user.unix_name,snum)) {
764 fstrcpy(user,vuser->user.unix_name);
766 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
770 /* check for a rhosts entry */
771 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
773 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
776 /* check the user= fields and the given password */
777 if (!ok && lp_username(snum)) {
780 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
782 pstring_sub(user_list,"%S",lp_servicename(snum));
784 for (auser=strtok(user_list,LIST_SEP);
786 auser = strtok(NULL,LIST_SEP))
790 auser = validate_group(auser+1,password,pwlen,snum);
795 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
801 fstrcpy(user2,auser);
802 if (user_ok(user2,snum) &&
803 password_ok(user2,password,pwlen,NULL))
807 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
812 } /* not guest only */
814 /* check for a normal guest connection */
815 if (!ok && GUEST_OK(snum))
818 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
819 if (Get_Pwnam(guestname,True))
821 fstrcpy(user,guestname);
823 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
826 DEBUG(0,("Invalid guest account %s??\n",guestname));
831 if (ok && !user_ok(user,snum))
833 DEBUG(0,("rejected invalid user %s\n",user));
841 /****************************************************************************
842 read the a hosts.equiv or .rhosts file and check if it
843 allows this user from this machine
844 ****************************************************************************/
845 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
847 int plus_allowed = 1;
850 char **lines = file_lines_load(equiv_file, NULL);
853 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
854 if (! lines) return False;
855 for (i=0; lines[i]; i++) {
856 char *buf = lines[i];
857 trim_string(buf," "," ");
859 if (buf[0] != '#' && buf[0] != '\n')
861 BOOL is_group = False;
864 if (strcmp(buf, "NO_PLUS\n") == 0)
866 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
873 if (*bp == '\n' && plus_allowed)
875 /* a bare plus means everbody allowed */
876 DEBUG(6, ("check_user_equiv everybody allowed\n"));
877 file_lines_free(lines);
881 else if (buf[0] == '-')
891 file_host = strtok(bp, " \t\n");
892 file_user = strtok(NULL, " \t\n");
893 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
894 file_user ? file_user : "(null)" ));
895 if (file_host && *file_host)
897 BOOL host_ok = False;
899 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
902 static char *mydomain = NULL;
904 yp_get_default_domain(&mydomain);
905 if (mydomain && innetgr(file_host,remote,user,mydomain))
911 DEBUG(1,("Netgroups not configured\n"));
916 /* is it this host */
917 /* the fact that remote has come from a call of gethostbyaddr
918 * means that it may have the fully qualified domain name
919 * so we could look up the file version to get it into
920 * a canonical form, but I would rather just type it
921 * in full in the equiv file
923 if (!host_ok && !is_group && strequal(remote, file_host))
929 /* is it this user */
930 if (file_user == 0 || strequal(user, file_user))
932 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
933 (plus ? "+" : "-"), file_host,
934 (file_user ? file_user : "")));
935 file_lines_free(lines);
936 return (plus ? True : False);
942 file_lines_free(lines);
947 /****************************************************************************
948 check for a possible hosts equiv or rhosts entry for the user
949 ****************************************************************************/
950 BOOL check_hosts_equiv(char *user)
954 struct passwd *pass = Get_Pwnam(user,True);
959 fname = lp_hosts_equiv();
961 /* note: don't allow hosts.equiv on root */
962 if (fname && *fname && (pass->pw_uid != 0)) {
963 if (check_user_equiv(user,client_name(),fname))
969 char *home = get_user_home_dir(user);
971 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
972 if (check_user_equiv(user,client_name(),rhostsfile))
981 /****************************************************************************
982 Return the client state structure.
983 ****************************************************************************/
985 struct cli_state *server_client(void)
987 static struct cli_state pw_cli;
991 /****************************************************************************
992 Support for server level security.
993 ****************************************************************************/
995 struct cli_state *server_cryptkey(void)
997 struct cli_state *cli;
999 struct in_addr dest_ip;
1001 BOOL connected_ok = False;
1003 cli = server_client();
1005 if (!cli_initialise(cli))
1008 pserver = strdup(lp_passwordserver());
1011 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
1012 standard_sub_basic(desthost);
1015 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1016 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1020 if (ismyip(dest_ip)) {
1021 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1025 if (cli_connect(cli, desthost, &dest_ip)) {
1026 DEBUG(3,("connected to password server %s\n",desthost));
1027 connected_ok = True;
1034 if (!connected_ok) {
1035 DEBUG(0,("password server not available\n"));
1040 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1043 DEBUG(3,("got session\n"));
1045 if (!cli_negprot(cli)) {
1046 DEBUG(1,("%s rejected the negprot\n",desthost));
1051 if (cli->protocol < PROTOCOL_LANMAN2 ||
1052 !(cli->sec_mode & 1)) {
1053 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1058 DEBUG(3,("password server OK\n"));
1063 /****************************************************************************
1064 Validate a password with the password server.
1065 ****************************************************************************/
1067 BOOL server_validate(char *user, char *domain,
1068 char *pass, int passlen,
1069 char *ntpass, int ntpasslen)
1071 struct cli_state *cli;
1072 static unsigned char badpass[24];
1073 static BOOL tested_password_server = False;
1074 static BOOL bad_password_server = False;
1076 cli = server_client();
1078 if (!cli->initialised) {
1079 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1084 memset(badpass, 0x1f, sizeof(badpass));
1086 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1088 * Very unlikely, our random bad password is the same as the users
1090 memset(badpass, badpass[0]+1, sizeof(badpass));
1094 * Attempt a session setup with a totally incorrect password.
1095 * If this succeeds with the guest bit *NOT* set then the password
1096 * server is broken and is not correctly setting the guest bit. We
1097 * need to detect this as some versions of NT4.x are broken. JRA.
1100 if(!tested_password_server) {
1101 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1102 (char *)badpass, sizeof(badpass), domain)) {
1105 * We connected to the password server so we
1106 * can say we've tested it.
1108 tested_password_server = True;
1110 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1111 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1112 with a bad password.\n", cli->desthost));
1113 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1114 use this machine as the password server.\n"));
1118 * Password server has the bug.
1120 bad_password_server = True;
1128 * We have already tested the password server.
1129 * Fail immediately if it has the bug.
1132 if(bad_password_server) {
1133 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1134 with a bad password.\n", cli->desthost));
1135 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1136 use this machine as the password server.\n"));
1142 * Now we know the password server will correctly set the guest bit, or is
1143 * not guest enabled, we can try with the real password.
1146 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1147 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1151 /* if logged in as guest then reject */
1152 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1153 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1163 /***********************************************************************
1164 Connect to a remote machine for domain security authentication
1165 given a name or IP address.
1166 ************************************************************************/
1168 static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine,
1169 unsigned char *trust_passwd)
1171 struct in_addr dest_ip;
1173 if(cli_initialise(pcli) == False) {
1174 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1178 standard_sub_basic(remote_machine);
1179 strupper(remote_machine);
1181 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1182 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1187 if (ismyip(dest_ip)) {
1188 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1194 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1195 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1196 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1201 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1202 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1203 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1207 pcli->protocol = PROTOCOL_NT1;
1209 if (!cli_negprot(pcli)) {
1210 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1211 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1216 if (pcli->protocol != PROTOCOL_NT1) {
1217 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1224 * Do an anonymous session setup.
1227 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1228 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1229 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1234 if (!(pcli->sec_mode & 1)) {
1235 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1241 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1242 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1243 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1249 * We now have an anonymous connection to IPC$ on the domain password server.
1253 * Even if the connect succeeds we need to setup the netlogon
1254 * pipe here. We do this as we may just have changed the domain
1255 * account password on the PDC and yet we may be talking to
1256 * a BDC that doesn't have this replicated yet. In this case
1257 * a successful connect to a DC needs to take the netlogon connect
1258 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1261 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1262 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1263 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1264 cli_nt_session_close(pcli);
1270 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1271 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1272 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1273 cli_nt_session_close(pcli);
1282 /***********************************************************************
1283 Utility function to attempt a connection to an IP address of a DC.
1284 ************************************************************************/
1286 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1291 * Ignore addresses we have already tried.
1294 if (ip_equal(ipzero, *ip))
1297 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1300 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1305 /***********************************************************************
1306 We have been asked to dynamcially determine the IP addresses of
1307 the PDC and BDC's for this DOMAIN, and query them in turn.
1308 ************************************************************************/
1309 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd)
1311 struct in_addr *ip_list = NULL;
1314 BOOL connected_ok = False;
1316 if (!get_dc_list(lp_workgroup(), &ip_list, &count))
1320 * Firstly try and contact a PDC/BDC who has the same
1321 * network address as any of our interfaces.
1323 for(i = 0; i < count; i++) {
1324 if(!is_local_net(ip_list[i]))
1327 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1330 ip_list[i] = ipzero; /* Tried and failed. */
1334 * Secondly try and contact a random PDC/BDC.
1337 i = (sys_random() % count);
1339 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1340 ip_list[i] = ipzero; /* Tried and failed. */
1344 * Finally go through the IP list in turn, ignoring any addresses
1345 * we have already tried.
1349 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1350 * Note that from a WINS server the #1 IP address is the PDC.
1352 for(i = 0; i < count; i++) {
1353 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1359 free((char *)ip_list);
1362 return connected_ok;
1367 /***********************************************************************
1368 Do the same as security=server, but using NT Domain calls and a session
1369 key from the machine password.
1370 ************************************************************************/
1372 BOOL domain_client_validate( char *user, char *domain,
1373 char *smb_apasswd, int smb_apasslen,
1374 char *smb_ntpasswd, int smb_ntpasslen,
1377 unsigned char local_challenge[8];
1378 unsigned char local_lm_response[24];
1379 unsigned char local_nt_reponse[24];
1380 unsigned char trust_passwd[16];
1381 fstring remote_machine;
1383 NET_ID_INFO_CTR ctr;
1384 NET_USER_INFO_3 info3;
1385 struct cli_state cli;
1387 BOOL connected_ok = False;
1389 if(user_exists != NULL)
1390 *user_exists = True; /* Only set false on a very specific error. */
1393 * Check that the requested domain is not our own machine name.
1394 * If it is, we should never check the PDC here, we use our own local
1398 if(strequal( domain, global_myname)) {
1399 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1404 * Next, check that the passwords given were encrypted.
1407 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1408 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1411 * Not encrypted - do so.
1414 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1415 generate_random_buffer( local_challenge, 8, False);
1416 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1417 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1420 smb_apasswd = (char *)local_lm_response;
1421 smb_ntpasswd = (char *)local_nt_reponse;
1425 * Encrypted - get the challenge we sent for these
1429 if (!last_challenge(local_challenge)) {
1430 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1436 * Get the machine account password.
1438 if (!get_trust_account_password(domain, trust_passwd, NULL))
1444 * At this point, smb_apasswd points to the lanman response to
1445 * the challenge in local_challenge, and smb_ntpasswd points to
1446 * the NT response to the challenge in local_challenge. Ship
1447 * these over the secure channel to a domain controller and
1448 * see if they were valid.
1454 * Treat each name in the 'password server =' line as a potential
1455 * PDC/BDC. Contact each in turn and try and authenticate.
1458 pserver = strdup(lp_passwordserver());
1461 while (!connected_ok &&
1462 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1463 if(strequal(remote_machine, "*")) {
1464 connected_ok = find_connect_pdc(&cli, trust_passwd);
1466 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1472 if (!connected_ok) {
1473 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1478 /* We really don't care what LUID we give the user. */
1479 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1481 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1482 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1483 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1484 &ctr, &info3) == False) {
1487 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1488 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1489 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1490 cli_nt_session_close(&cli);
1494 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1495 *user_exists = False;
1501 * Here, if we really want it, we have lots of info about the user in info3.
1506 * We don't actually need to do this - plus it fails currently with
1507 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1511 if(cli_nt_logoff(&cli, &ctr) == False) {
1512 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1513 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1514 cli_nt_session_close(&cli);
1521 cli_nt_session_close(&cli);