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;
127 /* same number of igroups as groups */
131 free((char *)vuser->groups);
134 free((char *)vuser->sids);
137 vuser->groups = NULL;
141 /****************************************************************************
142 return a validated username
143 ****************************************************************************/
144 char *validated_username(uint16 vuid)
146 user_struct *vuser = get_valid_user_struct(vuid);
153 /****************************************************************************
154 Setup the groups a user belongs to.
155 ****************************************************************************/
156 int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
160 gid_t *groups = NULL;
162 if (-1 == initgroups(user,gid))
164 DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
167 if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767)
169 DEBUG(0,("This is probably a problem with the account %s\n", user));
175 ngroups = sys_getgroups(0,&grp);
178 ngroups = groups_max();
181 if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
183 DEBUG(0,("setup_groups malloc fail !\n"));
187 ngroups = sys_getgroups(ngroups,groups);
189 (*p_ngroups) = ngroups;
190 (*p_groups) = groups;
192 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
193 for (i = 0; i < ngroups; i++ )
195 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
197 DEBUG( 3, ( "\n" ) );
203 /****************************************************************************
204 register a uid/name pair as being valid and that a valid password
205 has been given. vuid is biased by an offset. This allows us to
206 tell random client vuid's (normally zero) from valid vuids.
207 ****************************************************************************/
208 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest)
211 struct passwd *pwfile; /* for getting real name from passwd file */
213 /* Ensure no vuid gets registered in share level security. */
214 if(lp_security() == SEC_SHARE)
215 return UID_FIELD_INVALID;
219 * After observing MS-Exchange services writing to a Samba share
220 * I belive this code is incorrect. Each service does its own
221 * sessionsetup_and_X for the same user, and as each service shuts
222 * down, it does a user_logoff_and_X. As we are consolidating multiple
223 * sessionsetup_and_X's onto the same vuid here, when the first service
224 * shuts down, it invalidates all the open files for the other services.
225 * Hence I am removing this code and forcing each sessionsetup_and_X
227 * Jeremy Allison. (jallison@whistle.com).
231 for(i = 0; i < num_validated_users; i++) {
232 vuser = &validated_users[i];
233 if ( vuser->uid == uid )
234 return (uint16)(i + VUID_OFFSET); /* User already validated */
238 validated_users = (user_struct *)Realloc(validated_users,
240 (num_validated_users+1));
242 if (!validated_users)
244 DEBUG(0,("Failed to realloc users struct!\n"));
245 num_validated_users = 0;
246 return UID_FIELD_INVALID;
249 vuser = &validated_users[num_validated_users];
250 num_validated_users++;
254 vuser->guest = guest;
255 fstrcpy(vuser->name,unix_name);
256 fstrcpy(vuser->requested_name,requested_name);
262 vuser->groups = NULL;
264 /* Find all the groups this uid is in and store them.
265 Used by become_user() */
266 setup_groups(unix_name,uid,gid,
270 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
272 DEBUG(3, ("Clearing default real name\n"));
273 fstrcpy(vuser->real_name, "<Full Name>\0");
274 if (lp_unix_realname()) {
275 if ((pwfile=sys_getpwnam(vuser->name))!= NULL)
277 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
278 fstrcpy(vuser->real_name, pwfile->pw_gecos);
282 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
286 /****************************************************************************
287 add a name to the session users list
288 ****************************************************************************/
289 void add_session_user(char *user)
292 StrnCpy(suser,user,sizeof(suser)-1);
294 if (!Get_Pwnam(suser,True)) return;
296 if (suser && *suser && !in_list(suser,session_users,False))
298 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
299 DEBUG(1,("Too many session users??\n"));
302 pstrcat(session_users," ");
303 pstrcat(session_users,suser);
309 /****************************************************************************
310 update the encrypted smbpasswd file from the plaintext username and password
311 *****************************************************************************/
312 static BOOL update_smbpassword_file(char *user, char *password)
314 struct smb_passwd *smbpw;
318 smbpw = getsmbpwnam(user);
322 DEBUG(0,("getsmbpwnam returned NULL\n"));
327 * Remove the account disabled flag - we are updating the
328 * users password from a login.
330 smbpw->acct_ctrl &= ~ACB_DISABLED;
332 /* Here, the flag is one, because we want to ignore the
333 XXXXXXX'd out password */
334 ret = change_oem_password( smbpw, password, True);
336 DEBUG(3,("change_oem_password returned False\n"));
346 /****************************************************************************
347 core of smb password checking routine.
348 ****************************************************************************/
349 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
351 /* Finish the encryption of part_passwd. */
352 unsigned char p21[21];
353 unsigned char p24[24];
355 if (part_passwd == NULL)
356 DEBUG(10,("No password set - allowing access\n"));
357 /* No password set - always true ! */
358 if (part_passwd == NULL)
362 memcpy(p21,part_passwd,16);
367 DEBUG(100,("Part password (P16) was |"));
368 for(i = 0; i < 16; i++)
369 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
371 DEBUG(100,("Password from client was |"));
372 for(i = 0; i < 24; i++)
373 DEBUG(100,("%X ", (unsigned char)password[i]));
375 DEBUG(100,("Given challenge was |"));
376 for(i = 0; i < 8; i++)
377 DEBUG(100,("%X ", (unsigned char)c8[i]));
379 DEBUG(100,("Value from encryption was |"));
380 for(i = 0; i < 24; i++)
381 DEBUG(100,("%X ", (unsigned char)p24[i]));
385 return (memcmp(p24, password, 24) == 0);
388 /****************************************************************************
389 Do a specific test for an smb password being correct, given a smb_password and
390 the lanman and NT responses.
391 ****************************************************************************/
392 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],
393 uchar lm_pass[24], uchar nt_pass[24])
397 if (!lm_pass || !smb_pass) return(False);
399 DEBUG(4,("Checking SMB password for user %s\n",
400 smb_pass->smb_name));
402 if(smb_pass->acct_ctrl & ACB_DISABLED) {
403 DEBUG(1,("account for user %s was disabled.\n",
404 smb_pass->smb_name));
410 DEBUG(5,("use last SMBnegprot challenge\n"));
411 if (!last_challenge(challenge))
413 DEBUG(1,("no challenge done - password failed\n"));
419 DEBUG(5,("challenge received\n"));
420 memcpy(challenge, chal, 8);
423 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
424 /* We have the NT MD4 hash challenge available - see if we can
425 use it (ie. does it exist in the smbpasswd file).
427 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
428 if (smb_password_check((char *)nt_pass,
429 (uchar *)smb_pass->smb_nt_passwd,
431 DEBUG(4,("NT MD4 password check succeeded\n"));
434 DEBUG(4,("NT MD4 password check failed\n"));
437 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
438 no password, allow access. */
440 DEBUG(4,("Checking LM MD4 password\n"));
442 if((smb_pass->smb_passwd == NULL) &&
443 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
444 DEBUG(4,("no password required for user %s\n",
445 smb_pass->smb_name));
449 if((smb_pass->smb_passwd != NULL) &&
450 smb_password_check((char *)lm_pass,
451 (uchar *)smb_pass->smb_passwd, challenge)) {
452 DEBUG(4,("LM MD4 password check succeeded\n"));
456 DEBUG(4,("LM MD4 password check failed\n"));
462 /****************************************************************************
463 check if a username/password is OK assuming the password is a 24 byte
465 return True if the password is correct, False otherwise
466 ****************************************************************************/
468 BOOL pass_check_smb(char *user, char *domain,
469 uchar *chal, uchar *lm_pwd, uchar *nt_pwd,
473 struct smb_passwd *smb_pass;
475 if (!lm_pwd || !nt_pwd)
480 if (pwd != NULL && user == NULL)
482 pass = (struct passwd *) pwd;
483 user = pass->pw_name;
487 pass = Get_Pwnam(user,True);
492 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
496 smb_pass = getsmbpwnam(user);
498 if (smb_pass == NULL)
500 DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user));
504 /* Quit if the account was disabled. */
505 if(smb_pass->acct_ctrl & ACB_DISABLED) {
506 DEBUG(1,("Account for user '%s' was disabled.\n", user));
510 /* Ensure the uid's match */
511 if (smb_pass->smb_userid != pass->pw_uid)
513 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
517 if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
519 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", smb_pass->smb_name));
523 if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd))
528 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
532 /****************************************************************************
533 check if a username/password pair is OK either via the system password
534 database or the encrypted SMB password database
535 return True if the password is correct, False otherwise
536 ****************************************************************************/
537 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
539 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
541 /* if 24 bytes long assume it is an encrypted password */
544 if (!last_challenge(challenge))
546 DEBUG(0,("Error: challenge not done for user=%s\n", user));
550 return pass_check_smb(user, global_myworkgroup,
551 challenge, (uchar *)password, (uchar *)password, pwd);
554 return pass_check(user, password, pwlen, pwd,
555 lp_update_encrypted() ?
556 update_smbpassword_file : NULL);
559 /****************************************************************************
560 check if a username is valid
561 ****************************************************************************/
562 BOOL user_ok(char *user,int snum)
564 pstring valid, invalid;
567 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
568 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
570 pstring_sub(valid,"%S",lp_servicename(snum));
571 pstring_sub(invalid,"%S",lp_servicename(snum));
573 ret = !user_in_list(user,invalid);
575 if (ret && valid && *valid) {
576 ret = user_in_list(user,valid);
579 if (ret && lp_onlyuser(snum)) {
580 char *user_list = lp_username(snum);
581 pstring_sub(user_list,"%S",lp_servicename(snum));
582 ret = user_in_list(user,user_list);
591 /****************************************************************************
592 validate a group username entry. Return the username or NULL
593 ****************************************************************************/
594 static char *validate_group(char *group,char *password,int pwlen,int snum)
598 char *host, *user, *domain;
600 while (getnetgrent(&host, &user, &domain)) {
602 if (user_ok(user, snum) &&
603 password_ok(user,password,pwlen,NULL)) {
617 while ((gptr = (struct group *)getgrent())) {
618 if (strequal(gptr->gr_name,group))
623 * As user_ok can recurse doing a getgrent(), we must
624 * copy the member list into a pstring on the stack before
625 * use. Bug pointed out by leon@eatworms.swmed.edu.
631 size_t copied_len = 0;
635 member = member_list;
637 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
638 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
639 if( copied_len + member_len < sizeof(pstring)) {
641 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
643 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
644 copied_len += member_len;
645 member += copied_len;
653 member = member_list;
656 fstrcpy(name,member);
657 if (user_ok(name,snum) &&
658 password_ok(name,password,pwlen,NULL)) {
663 DEBUG(10,("validate_group = member = %s\n", member));
665 member += strlen(member) + 1;
678 /****************************************************************************
679 check for authority to login to a service with a given username/password
680 ****************************************************************************/
681 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
682 BOOL *guest,BOOL *force,uint16 vuid)
689 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
692 /* there are several possibilities:
693 1) login as the given user with given password
694 2) login as a previously registered username with the given password
695 3) login as a session list username with the given password
696 4) login as a previously validated user/password pair
697 5) login as the "user =" user with given password
698 6) login as the "user =" user with no password (guest connection)
699 7) login as guest user with no password
701 if the service is guest_only then steps 1 to 5 are skipped
704 if (GUEST_ONLY(snum)) *force = True;
706 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
709 user_struct *vuser = get_valid_user_struct(vuid);
711 /* check the given username and password */
712 if (!ok && (*user) && user_ok(user,snum)) {
713 ok = password_ok(user,password, pwlen, NULL);
714 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
717 /* check for a previously registered guest username */
718 if (!ok && (vuser != 0) && vuser->guest) {
719 if (user_ok(vuser->name,snum) &&
720 password_ok(vuser->name, password, pwlen, NULL)) {
721 fstrcpy(user, vuser->name);
722 vuser->guest = False;
723 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
729 /* now check the list of session users */
733 char *user_list = strdup(session_users);
734 if (!user_list) return(False);
736 for (auser=strtok(user_list,LIST_SEP);
738 auser = strtok(NULL,LIST_SEP))
741 fstrcpy(user2,auser);
742 if (!user_ok(user2,snum)) continue;
744 if (password_ok(user2,password, pwlen, NULL)) {
747 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
753 /* check for a previously validated username/password pair */
754 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
755 (vuser != 0) && !vuser->guest &&
756 user_ok(vuser->name,snum)) {
757 fstrcpy(user,vuser->name);
759 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
763 /* check for a rhosts entry */
764 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
766 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
769 /* check the user= fields and the given password */
770 if (!ok && lp_username(snum)) {
773 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
775 pstring_sub(user_list,"%S",lp_servicename(snum));
777 for (auser=strtok(user_list,LIST_SEP);
779 auser = strtok(NULL,LIST_SEP))
783 auser = validate_group(auser+1,password,pwlen,snum);
788 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
794 fstrcpy(user2,auser);
795 if (user_ok(user2,snum) &&
796 password_ok(user2,password,pwlen,NULL))
800 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
805 } /* not guest only */
807 /* check for a normal guest connection */
808 if (!ok && GUEST_OK(snum))
811 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
812 if (Get_Pwnam(guestname,True))
814 fstrcpy(user,guestname);
816 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
819 DEBUG(0,("Invalid guest account %s??\n",guestname));
824 if (ok && !user_ok(user,snum))
826 DEBUG(0,("rejected invalid user %s\n",user));
834 /****************************************************************************
835 read the a hosts.equiv or .rhosts file and check if it
836 allows this user from this machine
837 ****************************************************************************/
838 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
841 int plus_allowed = 1;
844 FILE *fp = sys_fopen(equiv_file, "r");
845 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
846 if (! fp) return False;
847 while(fgets(buf, sizeof(buf), fp))
849 trim_string(buf," "," ");
851 if (buf[0] != '#' && buf[0] != '\n')
853 BOOL is_group = False;
856 if (strcmp(buf, "NO_PLUS\n") == 0)
858 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
865 if (*bp == '\n' && plus_allowed)
867 /* a bare plus means everbody allowed */
868 DEBUG(6, ("check_user_equiv everybody allowed\n"));
873 else if (buf[0] == '-')
883 file_host = strtok(bp, " \t\n");
884 file_user = strtok(NULL, " \t\n");
885 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
886 file_user ? file_user : "(null)" ));
887 if (file_host && *file_host)
889 BOOL host_ok = False;
891 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
894 static char *mydomain = NULL;
896 yp_get_default_domain(&mydomain);
897 if (mydomain && innetgr(file_host,remote,user,mydomain))
903 DEBUG(1,("Netgroups not configured\n"));
908 /* is it this host */
909 /* the fact that remote has come from a call of gethostbyaddr
910 * means that it may have the fully qualified domain name
911 * so we could look up the file version to get it into
912 * a canonical form, but I would rather just type it
913 * in full in the equiv file
915 if (!host_ok && !is_group && strequal(remote, file_host))
921 /* is it this user */
922 if (file_user == 0 || strequal(user, file_user))
925 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
926 (plus ? "+" : "-"), file_host,
927 (file_user ? file_user : "")));
928 return (plus ? True : False);
939 /****************************************************************************
940 check for a possible hosts equiv or rhosts entry for the user
941 ****************************************************************************/
942 BOOL check_hosts_equiv(char *user)
946 struct passwd *pass = Get_Pwnam(user,True);
951 fname = lp_hosts_equiv();
953 /* note: don't allow hosts.equiv on root */
954 if (fname && *fname && (pass->pw_uid != 0)) {
956 if (check_user_equiv(user,client_name(Client),fname))
962 char *home = get_user_home_dir(user);
965 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
966 if (check_user_equiv(user,client_name(Client),rhostsfile))
975 /****************************************************************************
976 Return the client state structure.
977 ****************************************************************************/
979 struct cli_state *server_client(void)
981 static struct cli_state pw_cli;
985 /****************************************************************************
986 Support for server level security.
987 ****************************************************************************/
989 struct cli_state *server_cryptkey(void)
991 struct cli_state *cli;
993 struct in_addr dest_ip;
995 BOOL connected_ok = False;
997 cli = server_client();
999 if (!cli_initialise(cli))
1002 pserver = strdup(lp_passwordserver());
1005 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
1006 standard_sub_basic(desthost);
1009 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1010 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1014 if (ismyip(dest_ip)) {
1015 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1019 if (cli_connect(cli, desthost, &dest_ip)) {
1020 DEBUG(3,("connected to password server %s\n",desthost));
1021 connected_ok = True;
1028 if (!connected_ok) {
1029 DEBUG(0,("password server not available\n"));
1034 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1037 DEBUG(3,("got session\n"));
1039 if (!cli_negprot(cli)) {
1040 DEBUG(1,("%s rejected the negprot\n",desthost));
1045 if (cli->protocol < PROTOCOL_LANMAN2 ||
1046 !(cli->sec_mode & 1)) {
1047 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1052 DEBUG(3,("password server OK\n"));
1057 /****************************************************************************
1058 Validate a password with the password server.
1059 ****************************************************************************/
1061 BOOL server_validate(char *user, char *domain,
1062 char *pass, int passlen,
1063 char *ntpass, int ntpasslen)
1065 struct cli_state *cli;
1066 static unsigned char badpass[24];
1067 static BOOL tested_password_server = False;
1068 static BOOL bad_password_server = False;
1070 cli = server_client();
1072 if (!cli->initialised) {
1073 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1078 memset(badpass, 0x1f, sizeof(badpass));
1080 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1082 * Very unlikely, our random bad password is the same as the users
1084 memset(badpass, badpass[0]+1, sizeof(badpass));
1088 * Attempt a session setup with a totally incorrect password.
1089 * If this succeeds with the guest bit *NOT* set then the password
1090 * server is broken and is not correctly setting the guest bit. We
1091 * need to detect this as some versions of NT4.x are broken. JRA.
1094 if(!tested_password_server) {
1095 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1096 (char *)badpass, sizeof(badpass), domain)) {
1099 * We connected to the password server so we
1100 * can say we've tested it.
1102 tested_password_server = True;
1104 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1105 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1106 with a bad password.\n", cli->desthost));
1107 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1108 use this machine as the password server.\n"));
1112 * Password server has the bug.
1114 bad_password_server = True;
1122 * We have already tested the password server.
1123 * Fail immediately if it has the bug.
1126 if(bad_password_server) {
1127 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1128 with a bad password.\n", cli->desthost));
1129 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1130 use this machine as the password server.\n"));
1136 * Now we know the password server will correctly set the guest bit, or is
1137 * not guest enabled, we can try with the real password.
1140 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1141 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1145 /* if logged in as guest then reject */
1146 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1147 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1157 /***********************************************************************
1158 Connect to a remote machine for domain security authentication
1159 given a name or IP address.
1160 ************************************************************************/
1162 static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine,
1163 unsigned char *trust_passwd)
1165 struct in_addr dest_ip;
1167 if(cli_initialise(pcli) == False) {
1168 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1172 standard_sub_basic(remote_machine);
1173 strupper(remote_machine);
1175 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1176 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1181 if (ismyip(dest_ip)) {
1182 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1188 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1189 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1190 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1195 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1196 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1197 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1201 pcli->protocol = PROTOCOL_NT1;
1203 if (!cli_negprot(pcli)) {
1204 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1205 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1210 if (pcli->protocol != PROTOCOL_NT1) {
1211 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1218 * Do an anonymous session setup.
1221 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1222 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1223 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1228 if (!(pcli->sec_mode & 1)) {
1229 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1235 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1236 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1237 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1243 * We now have an anonymous connection to IPC$ on the domain password server.
1247 * Even if the connect succeeds we need to setup the netlogon
1248 * pipe here. We do this as we may just have changed the domain
1249 * account password on the PDC and yet we may be talking to
1250 * a BDC that doesn't have this replicated yet. In this case
1251 * a successful connect to a DC needs to take the netlogon connect
1252 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1255 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1256 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1257 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1258 cli_nt_session_close(pcli);
1264 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1265 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1266 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1267 cli_nt_session_close(pcli);
1276 /***********************************************************************
1277 Utility function to attempt a connection to an IP address of a DC.
1278 ************************************************************************/
1280 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1285 * Ignore addresses we have already tried.
1288 if (ip_equal(ipzero, *ip))
1291 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1294 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1299 /***********************************************************************
1300 We have been asked to dynamcially determine the IP addresses of
1301 the PDC and BDC's for this DOMAIN, and query them in turn.
1302 ************************************************************************/
1303 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd)
1305 struct in_addr *ip_list = NULL;
1308 BOOL connected_ok = False;
1310 if (!get_dc_list(lp_workgroup(), &ip_list, &count))
1314 * Firstly try and contact a PDC/BDC who has the same
1315 * network address as any of our interfaces.
1317 for(i = 0; i < count; i++) {
1318 if(!is_local_net(ip_list[i]))
1321 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1324 ip_list[i] = ipzero; /* Tried and failed. */
1328 * Secondly try and contact a random PDC/BDC.
1331 i = (sys_random() % count);
1333 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1334 ip_list[i] = ipzero; /* Tried and failed. */
1338 * Finally go through the IP list in turn, ignoring any addresses
1339 * we have already tried.
1343 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1344 * Note that from a WINS server the #1 IP address is the PDC.
1346 for(i = 0; i < count; i++) {
1347 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1353 free((char *)ip_list);
1356 return connected_ok;
1361 /***********************************************************************
1362 Do the same as security=server, but using NT Domain calls and a session
1363 key from the machine password.
1364 ************************************************************************/
1366 BOOL domain_client_validate( char *user, char *domain,
1367 char *smb_apasswd, int smb_apasslen,
1368 char *smb_ntpasswd, int smb_ntpasslen,
1371 unsigned char local_challenge[8];
1372 unsigned char local_lm_response[24];
1373 unsigned char local_nt_reponse[24];
1374 unsigned char trust_passwd[16];
1375 fstring remote_machine;
1377 NET_ID_INFO_CTR ctr;
1378 NET_USER_INFO_3 info3;
1379 struct cli_state cli;
1381 BOOL connected_ok = False;
1383 if(user_exists != NULL)
1384 *user_exists = True; /* Only set false on a very specific error. */
1387 * Check that the requested domain is not our own machine name.
1388 * If it is, we should never check the PDC here, we use our own local
1392 if(strequal( domain, global_myname)) {
1393 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1398 * Next, check that the passwords given were encrypted.
1401 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1402 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1405 * Not encrypted - do so.
1408 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1409 generate_random_buffer( local_challenge, 8, False);
1410 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1411 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1414 smb_apasswd = (char *)local_lm_response;
1415 smb_ntpasswd = (char *)local_nt_reponse;
1419 * Encrypted - get the challenge we sent for these
1423 if (!last_challenge(local_challenge)) {
1424 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1430 * Get the machine account password.
1432 if (!trust_get_passwd( trust_passwd, global_myworkgroup, global_myname))
1438 * At this point, smb_apasswd points to the lanman response to
1439 * the challenge in local_challenge, and smb_ntpasswd points to
1440 * the NT response to the challenge in local_challenge. Ship
1441 * these over the secure channel to a domain controller and
1442 * see if they were valid.
1448 * Treat each name in the 'password server =' line as a potential
1449 * PDC/BDC. Contact each in turn and try and authenticate.
1452 pserver = strdup(lp_passwordserver());
1455 while (!connected_ok &&
1456 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1457 if(strequal(remote_machine, "*")) {
1458 connected_ok = find_connect_pdc(&cli, trust_passwd);
1460 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1466 if (!connected_ok) {
1467 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1472 /* We really don't care what LUID we give the user. */
1473 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1475 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1476 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1477 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1478 &ctr, &info3) == False) {
1481 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1482 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1483 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1484 cli_nt_session_close(&cli);
1488 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1489 *user_exists = False;
1495 * Here, if we really want it, we have lots of info about the user in info3.
1500 * We don't actually need to do this - plus it fails currently with
1501 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1505 if(cli_nt_logoff(&cli, &ctr) == False) {
1506 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1507 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1508 cli_nt_session_close(&cli);
1515 cli_nt_session_close(&cli);