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 /****************************************************************************
117 ****************************************************************************/
118 void invalidate_vuid(uint16 vuid)
120 user_struct *vuser = get_valid_user_struct(vuid);
122 if (vuser == NULL) return;
124 vuser->uid = (uid_t)-1;
125 vuser->gid = (gid_t)-1;
127 /* same number of igroups as groups */
131 free((char *)vuser->groups);
133 vuser->groups = NULL;
137 /****************************************************************************
138 return a validated username
139 ****************************************************************************/
140 char *validated_username(uint16 vuid)
142 user_struct *vuser = get_valid_user_struct(vuid);
145 return(vuser->user.unix_name);
148 /****************************************************************************
149 return a validated domain
150 ****************************************************************************/
151 char *validated_domain(uint16 vuid)
153 user_struct *vuser = get_valid_user_struct(vuid);
156 return(vuser->user.domain);
160 /****************************************************************************
161 Setup the groups a user belongs to.
162 ****************************************************************************/
163 int setup_groups(char *user, char *domain,
164 uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
168 gid_t *groups = NULL;
170 if (-1 == initgroups(user,gid))
172 DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
175 if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767)
177 DEBUG(0,("This is probably a problem with the account %s\n", user));
183 ngroups = sys_getgroups(0,&grp);
186 ngroups = groups_max();
189 if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
191 DEBUG(0,("setup_groups malloc fail !\n"));
195 ngroups = sys_getgroups(ngroups,groups);
197 (*p_ngroups) = ngroups;
198 (*p_groups) = groups;
200 DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
201 for (i = 0; i < ngroups; i++ )
203 DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
205 DEBUG( 3, ( "\n" ) );
211 /****************************************************************************
212 register a uid/name pair as being valid and that a valid password
213 has been given. vuid is biased by an offset. This allows us to
214 tell random client vuid's (normally zero) from valid vuids.
215 ****************************************************************************/
216 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
217 char *domain,BOOL guest,
218 NET_USER_INFO_3 *usr)
221 struct passwd *pwfile; /* for getting real name from passwd file */
223 /* Ensure no vuid gets registered in share level security. */
224 if(lp_security() == SEC_SHARE)
225 return UID_FIELD_INVALID;
229 * After observing MS-Exchange services writing to a Samba share
230 * I belive this code is incorrect. Each service does its own
231 * sessionsetup_and_X for the same user, and as each service shuts
232 * down, it does a user_logoff_and_X. As we are consolidating multiple
233 * sessionsetup_and_X's onto the same vuid here, when the first service
234 * shuts down, it invalidates all the open files for the other services.
235 * Hence I am removing this code and forcing each sessionsetup_and_X
237 * Jeremy Allison. (jallison@whistle.com).
241 for(i = 0; i < num_validated_users; i++) {
242 vuser = &validated_users[i];
243 if ( vuser->uid == uid )
244 return (uint16)(i + VUID_OFFSET); /* User already validated */
248 validated_users = (user_struct *)Realloc(validated_users,
250 (num_validated_users+1));
252 if (!validated_users)
254 DEBUG(0,("Failed to realloc users struct!\n"));
255 num_validated_users = 0;
256 return UID_FIELD_INVALID;
259 vuser = &validated_users[num_validated_users];
260 num_validated_users++;
264 vuser->guest = guest;
265 fstrcpy(vuser->user.unix_name,unix_name);
266 fstrcpy(vuser->user.smb_name,requested_name);
267 fstrcpy(vuser->user.domain,domain);
270 vuser->groups = NULL;
272 /* Find all the groups this uid is in and store them.
273 Used by become_user() */
274 setup_groups(unix_name,domain,uid,gid,
281 extern DOM_SID global_sam_sid;
283 DEBUG(0,("vuser struct usr being filled in with trash, today\n"));
284 DEBUG(0,("this needs to be replaced with a proper surs impl.\n"));
285 DEBUG(0,("e.g. the one used in winbindd. in fact, all\n"));
286 DEBUG(0,("occurrences of pdb_xxx_to_xxx should be replaced\n"));
287 DEBUG(0,("as soon as possible.\n"));
288 vuser->usr.user_id = pdb_uid_to_user_rid(uid);
289 vuser->usr.group_id = pdb_gid_to_group_rid(gid);
290 vuser->usr.num_groups = vuser->n_groups;
291 if (vuser->n_groups != 0)
293 vuser->usr.gids = g_new(DOM_GID, vuser->usr.num_groups);
294 if (vuser->usr.gids == NULL)
295 return UID_FIELD_INVALID;
298 for (i = 0; i < vuser->usr.num_groups; i++)
300 DOM_GID *ntgid = &vuser->usr.gids[i];
302 ntgid->g_rid = pdb_gid_to_group_rid(vuser->groups[i]);
305 /* this is possibly the worst thing to do, ever. it assumes */
306 /* that all users of this system are in the local SAM database */
307 /* however, because there is no code to do anything otherwise, */
308 /* we have no choice */
310 init_dom_sid2(&vuser->usr.dom_sid, &global_sam_sid);
317 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
319 DEBUG(3, ("Clearing default real name\n"));
320 fstrcpy(vuser->user.full_name, "<Full Name>");
321 if (lp_unix_realname()) {
322 if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL)
324 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos));
325 fstrcpy(vuser->user.full_name, pwfile->pw_gecos);
329 memset(&vuser->dc, '\0', sizeof(vuser->dc));
331 return (uint16)((num_validated_users - 1) + VUID_OFFSET);
335 /****************************************************************************
336 add a name to the session users list
337 ****************************************************************************/
338 void add_session_user(char *user)
341 StrnCpy(suser,user,sizeof(suser)-1);
343 if (!Get_Pwnam(suser,True)) return;
345 if (suser && *suser && !in_list(suser,session_users,False))
347 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
348 DEBUG(1,("Too many session users??\n"));
351 pstrcat(session_users," ");
352 pstrcat(session_users,suser);
358 /****************************************************************************
359 update the encrypted smbpasswd file from the plaintext username and password
360 *****************************************************************************/
361 static BOOL update_smbpassword_file(char *user, char *password)
363 struct smb_passwd *smbpw;
367 smbpw = getsmbpwnam(user);
371 DEBUG(0,("getsmbpwnam returned NULL\n"));
376 * Remove the account disabled flag - we are updating the
377 * users password from a login.
379 smbpw->acct_ctrl &= ~ACB_DISABLED;
381 /* Here, the flag is one, because we want to ignore the
382 XXXXXXX'd out password */
383 ret = change_oem_password( smbpw, password, True);
385 DEBUG(3,("change_oem_password returned False\n"));
395 /****************************************************************************
396 core of smb password checking routine.
397 ****************************************************************************/
398 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
400 /* Finish the encryption of part_passwd. */
401 unsigned char p21[21];
402 unsigned char p24[24];
404 if (part_passwd == NULL)
405 DEBUG(10,("No password set - allowing access\n"));
406 /* No password set - always true ! */
407 if (part_passwd == NULL)
411 memcpy(p21,part_passwd,16);
416 DEBUG(100,("Part password (P16) was |"));
417 for(i = 0; i < 16; i++)
418 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
420 DEBUG(100,("Password from client was |"));
421 for(i = 0; i < 24; i++)
422 DEBUG(100,("%X ", (unsigned char)password[i]));
424 DEBUG(100,("Given challenge was |"));
425 for(i = 0; i < 8; i++)
426 DEBUG(100,("%X ", (unsigned char)c8[i]));
428 DEBUG(100,("Value from encryption was |"));
429 for(i = 0; i < 24; i++)
430 DEBUG(100,("%X ", (unsigned char)p24[i]));
434 return (memcmp(p24, password, 24) == 0);
437 /****************************************************************************
438 Do a specific test for an smb password being correct, given a smb_password and
439 the lanman and NT responses.
440 ****************************************************************************/
441 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],
442 uchar lm_pass[24], uchar nt_pass[24])
446 if (!lm_pass || !smb_pass) return(False);
448 DEBUG(4,("Checking SMB password for user %s\n",
449 smb_pass->smb_name));
451 if(smb_pass->acct_ctrl & ACB_DISABLED) {
452 DEBUG(1,("account for user %s was disabled.\n",
453 smb_pass->smb_name));
459 DEBUG(5,("use last SMBnegprot challenge\n"));
460 if (!last_challenge(challenge))
462 DEBUG(1,("no challenge done - password failed\n"));
468 DEBUG(5,("challenge received\n"));
469 memcpy(challenge, chal, 8);
472 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
473 /* We have the NT MD4 hash challenge available - see if we can
474 use it (ie. does it exist in the smbpasswd file).
476 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
477 if (smb_password_check((char *)nt_pass,
478 (uchar *)smb_pass->smb_nt_passwd,
480 DEBUG(4,("NT MD4 password check succeeded\n"));
483 DEBUG(4,("NT MD4 password check failed\n"));
486 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
487 no password, allow access. */
489 DEBUG(4,("Checking LM MD4 password\n"));
491 if((smb_pass->smb_passwd == NULL) &&
492 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
493 DEBUG(4,("no password required for user %s\n",
494 smb_pass->smb_name));
498 if((smb_pass->smb_passwd != NULL) &&
499 smb_password_check((char *)lm_pass,
500 (uchar *)smb_pass->smb_passwd, challenge)) {
501 DEBUG(4,("LM MD4 password check succeeded\n"));
505 DEBUG(4,("LM MD4 password check failed\n"));
511 /****************************************************************************
512 check if a username/password is OK assuming the password is a 24 byte
514 return True if the password is correct, False otherwise
515 ****************************************************************************/
517 BOOL pass_check_smb(char *user, char *domain,
518 uchar *chal, uchar *lm_pwd, uchar *nt_pwd,
522 struct smb_passwd *smb_pass;
524 if (!lm_pwd || !nt_pwd)
529 if (pwd != NULL && user == NULL)
531 pass = (struct passwd *) pwd;
532 user = pass->pw_name;
536 pass = smb_getpwnam(user,True);
541 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
545 smb_pass = getsmbpwnam(user);
547 if (smb_pass == NULL)
549 DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user));
553 /* Quit if the account was disabled. */
554 if(smb_pass->acct_ctrl & ACB_DISABLED) {
555 DEBUG(1,("Account for user '%s' was disabled.\n", user));
559 /* Ensure the uid's match */
560 if (smb_pass->smb_userid != pass->pw_uid)
562 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
566 if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
568 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", smb_pass->smb_name));
572 if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd))
577 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
581 /****************************************************************************
582 check if a username/password pair is OK either via the system password
583 database or the encrypted SMB password database
584 return True if the password is correct, False otherwise
585 ****************************************************************************/
586 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
588 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
590 /* if 24 bytes long assume it is an encrypted password */
593 if (!last_challenge(challenge))
595 DEBUG(0,("Error: challenge not done for user=%s\n", user));
599 return pass_check_smb(user, global_myworkgroup,
600 challenge, (uchar *)password, (uchar *)password, pwd);
603 return pass_check(user, password, pwlen, pwd,
604 lp_update_encrypted() ?
605 update_smbpassword_file : NULL);
608 /****************************************************************************
609 check if a username is valid
610 ****************************************************************************/
611 BOOL user_ok(char *user,int snum)
613 pstring valid, invalid;
616 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
617 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
619 pstring_sub(valid,"%S",lp_servicename(snum));
620 pstring_sub(invalid,"%S",lp_servicename(snum));
622 ret = !user_in_list(user,invalid);
624 if (ret && valid && *valid) {
625 ret = user_in_list(user,valid);
628 if (ret && lp_onlyuser(snum)) {
629 char *user_list = lp_username(snum);
630 pstring_sub(user_list,"%S",lp_servicename(snum));
631 ret = user_in_list(user,user_list);
640 /****************************************************************************
641 validate a group username entry. Return the username or NULL
642 ****************************************************************************/
643 static char *validate_group(char *group,char *password,int pwlen,int snum)
647 char *host, *user, *domain;
649 while (getnetgrent(&host, &user, &domain)) {
651 if (user_ok(user, snum) &&
652 password_ok(user,password,pwlen,NULL)) {
666 while ((gptr = (struct group *)getgrent())) {
667 if (strequal(gptr->gr_name,group))
672 * As user_ok can recurse doing a getgrent(), we must
673 * copy the member list into a pstring on the stack before
674 * use. Bug pointed out by leon@eatworms.swmed.edu.
680 size_t copied_len = 0;
684 member = member_list;
686 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
687 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
688 if( copied_len + member_len < sizeof(pstring)) {
690 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
692 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
693 copied_len += member_len;
694 member += copied_len;
702 member = member_list;
705 fstrcpy(name,member);
706 if (user_ok(name,snum) &&
707 password_ok(name,password,pwlen,NULL)) {
712 DEBUG(10,("validate_group = member = %s\n", member));
714 member += strlen(member) + 1;
727 /****************************************************************************
728 check for authority to login to a service with a given username/password
729 ****************************************************************************/
730 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
731 BOOL *guest,BOOL *force,uint16 vuid)
738 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
741 /* there are several possibilities:
742 1) login as the given user with given password
743 2) login as a previously registered username with the given password
744 3) login as a session list username with the given password
745 4) login as a previously validated user/password pair
746 5) login as the "user =" user with given password
747 6) login as the "user =" user with no password (guest connection)
748 7) login as guest user with no password
750 if the service is guest_only then steps 1 to 5 are skipped
753 if (GUEST_ONLY(snum)) *force = True;
755 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
758 user_struct *vuser = get_valid_user_struct(vuid);
760 /* check the given username and password */
761 if (!ok && (*user) && user_ok(user,snum)) {
762 ok = password_ok(user,password, pwlen, NULL);
763 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
766 /* check for a previously registered guest username */
767 if (!ok && (vuser != 0) && vuser->guest) {
768 if (user_ok(vuser->user.unix_name,snum) &&
769 password_ok(vuser->user.unix_name, password, pwlen, NULL)) {
770 fstrcpy(user, vuser->user.unix_name);
771 vuser->guest = False;
772 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
778 /* now check the list of session users */
782 char *user_list = strdup(session_users);
783 if (!user_list) return(False);
785 for (auser=strtok(user_list,LIST_SEP);
787 auser = strtok(NULL,LIST_SEP))
790 fstrcpy(user2,auser);
791 if (!user_ok(user2,snum)) continue;
793 if (password_ok(user2,password, pwlen, NULL)) {
796 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
802 /* check for a previously validated username/password pair */
803 if (!ok && (lp_security() > SEC_SHARE) &&
804 (vuser != 0) && !vuser->guest &&
805 user_ok(vuser->user.unix_name,snum)) {
806 fstrcpy(user,vuser->user.unix_name);
808 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
812 /* check for a rhosts entry */
813 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
815 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
818 /* check the user= fields and the given password */
819 if (!ok && lp_username(snum)) {
822 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
824 pstring_sub(user_list,"%S",lp_servicename(snum));
826 for (auser=strtok(user_list,LIST_SEP);
828 auser = strtok(NULL,LIST_SEP))
832 auser = validate_group(auser+1,password,pwlen,snum);
837 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
843 fstrcpy(user2,auser);
844 if (user_ok(user2,snum) &&
845 password_ok(user2,password,pwlen,NULL))
849 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
854 } /* not guest only */
856 /* check for a normal guest connection */
857 if (!ok && GUEST_OK(snum))
860 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
861 if (Get_Pwnam(guestname,True))
863 fstrcpy(user,guestname);
865 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
868 DEBUG(0,("Invalid guest account %s??\n",guestname));
873 if (ok && !user_ok(user,snum))
875 DEBUG(0,("rejected invalid user %s\n",user));
883 /****************************************************************************
884 read the a hosts.equiv or .rhosts file and check if it
885 allows this user from this machine
886 ****************************************************************************/
887 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
889 int plus_allowed = 1;
892 char **lines = file_lines_load(equiv_file, NULL);
895 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
896 if (! lines) return False;
897 for (i=0; lines[i]; i++) {
898 char *buf = lines[i];
899 trim_string(buf," "," ");
901 if (buf[0] != '#' && buf[0] != '\n')
903 BOOL is_group = False;
906 if (strcmp(buf, "NO_PLUS\n") == 0)
908 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
915 if (*bp == '\n' && plus_allowed)
917 /* a bare plus means everbody allowed */
918 DEBUG(6, ("check_user_equiv everybody allowed\n"));
919 file_lines_free(lines);
923 else if (buf[0] == '-')
933 file_host = strtok(bp, " \t\n");
934 file_user = strtok(NULL, " \t\n");
935 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
936 file_user ? file_user : "(null)" ));
937 if (file_host && *file_host)
939 BOOL host_ok = False;
941 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
944 static char *mydomain = NULL;
946 yp_get_default_domain(&mydomain);
947 if (mydomain && innetgr(file_host,remote,user,mydomain))
953 DEBUG(1,("Netgroups not configured\n"));
958 /* is it this host */
959 /* the fact that remote has come from a call of gethostbyaddr
960 * means that it may have the fully qualified domain name
961 * so we could look up the file version to get it into
962 * a canonical form, but I would rather just type it
963 * in full in the equiv file
965 if (!host_ok && !is_group && strequal(remote, file_host))
971 /* is it this user */
972 if (file_user == 0 || strequal(user, file_user))
974 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
975 (plus ? "+" : "-"), file_host,
976 (file_user ? file_user : "")));
977 file_lines_free(lines);
978 return (plus ? True : False);
984 file_lines_free(lines);
989 /****************************************************************************
990 check for a possible hosts equiv or rhosts entry for the user
991 ****************************************************************************/
992 BOOL check_hosts_equiv(char *user)
996 struct passwd *pass = Get_Pwnam(user,True);
1001 fname = lp_hosts_equiv();
1003 /* note: don't allow hosts.equiv on root */
1004 if (fname && *fname && (pass->pw_uid != 0)) {
1005 if (check_user_equiv(user,client_name(),fname))
1009 if (lp_use_rhosts())
1011 char *home = get_user_home_dir(user);
1013 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
1014 if (check_user_equiv(user,client_name(),rhostsfile))
1023 /****************************************************************************
1024 Return the client state structure.
1025 ****************************************************************************/
1027 struct cli_state *server_client(void)
1029 static struct cli_state pw_cli;
1033 /****************************************************************************
1034 Support for server level security.
1035 ****************************************************************************/
1037 struct cli_state *server_cryptkey(void)
1039 struct cli_state *cli;
1041 struct in_addr dest_ip;
1043 BOOL connected_ok = False;
1045 cli = server_client();
1047 if (!cli_initialise(cli))
1050 pserver = strdup(lp_passwordserver());
1053 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
1054 standard_sub_basic(desthost);
1057 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1058 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1062 if (ismyip(dest_ip)) {
1063 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1067 if (cli_connect(cli, desthost, &dest_ip)) {
1068 DEBUG(3,("connected to password server %s\n",desthost));
1069 connected_ok = True;
1076 if (!connected_ok) {
1077 DEBUG(0,("password server not available\n"));
1082 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1085 DEBUG(3,("got session\n"));
1087 if (!cli_negprot(cli)) {
1088 DEBUG(1,("%s rejected the negprot\n",desthost));
1093 if (cli->protocol < PROTOCOL_LANMAN2 ||
1094 !(cli->sec_mode & 1)) {
1095 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1100 DEBUG(3,("password server OK\n"));
1105 /****************************************************************************
1106 Validate a password with the password server.
1107 ****************************************************************************/
1109 BOOL server_validate(char *user, char *domain,
1110 char *pass, int passlen,
1111 char *ntpass, int ntpasslen)
1113 struct cli_state *cli;
1114 static unsigned char badpass[24];
1115 static BOOL tested_password_server = False;
1116 static BOOL bad_password_server = False;
1118 cli = server_client();
1120 if (!cli->initialised) {
1121 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1126 memset(badpass, 0x1f, sizeof(badpass));
1128 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1130 * Very unlikely, our random bad password is the same as the users
1132 memset(badpass, badpass[0]+1, sizeof(badpass));
1136 * Attempt a session setup with a totally incorrect password.
1137 * If this succeeds with the guest bit *NOT* set then the password
1138 * server is broken and is not correctly setting the guest bit. We
1139 * need to detect this as some versions of NT4.x are broken. JRA.
1142 if(!tested_password_server) {
1143 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1144 (char *)badpass, sizeof(badpass), domain)) {
1147 * We connected to the password server so we
1148 * can say we've tested it.
1150 tested_password_server = True;
1152 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1153 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1154 with a bad password.\n", cli->desthost));
1155 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1156 use this machine as the password server.\n"));
1160 * Password server has the bug.
1162 bad_password_server = True;
1170 * We have already tested the password server.
1171 * Fail immediately if it has the bug.
1174 if(bad_password_server) {
1175 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1176 with a bad password.\n", cli->desthost));
1177 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1178 use this machine as the password server.\n"));
1184 * Now we know the password server will correctly set the guest bit, or is
1185 * not guest enabled, we can try with the real password.
1188 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1189 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1193 /* if logged in as guest then reject */
1194 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1195 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1205 /***********************************************************************
1206 Connect to a remote machine for domain security authentication
1207 given a name or IP address.
1208 ************************************************************************/
1210 static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine,
1211 unsigned char *trust_passwd)
1213 struct in_addr dest_ip;
1215 if(cli_initialise(pcli) == False) {
1216 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1220 standard_sub_basic(remote_machine);
1221 strupper(remote_machine);
1223 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1224 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1229 if (ismyip(dest_ip)) {
1230 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1236 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1237 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1238 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1243 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1244 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1245 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1249 pcli->protocol = PROTOCOL_NT1;
1251 if (!cli_negprot(pcli)) {
1252 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1253 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1258 if (pcli->protocol != PROTOCOL_NT1) {
1259 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1266 * Do an anonymous session setup.
1269 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1270 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1271 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1276 if (!(pcli->sec_mode & 1)) {
1277 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1283 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1284 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1285 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1291 * We now have an anonymous connection to IPC$ on the domain password server.
1295 * Even if the connect succeeds we need to setup the netlogon
1296 * pipe here. We do this as we may just have changed the domain
1297 * account password on the PDC and yet we may be talking to
1298 * a BDC that doesn't have this replicated yet. In this case
1299 * a successful connect to a DC needs to take the netlogon connect
1300 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1303 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1304 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1305 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1306 cli_nt_session_close(pcli);
1312 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1313 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1314 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1315 cli_nt_session_close(pcli);
1324 /***********************************************************************
1325 Utility function to attempt a connection to an IP address of a DC.
1326 ************************************************************************/
1328 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1333 * Ignore addresses we have already tried.
1336 if (ip_equal(ipzero, *ip))
1339 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1342 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1347 /***********************************************************************
1348 We have been asked to dynamcially determine the IP addresses of
1349 the PDC and BDC's for this DOMAIN, and query them in turn.
1350 ************************************************************************/
1351 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd)
1353 struct in_addr *ip_list = NULL;
1356 BOOL connected_ok = False;
1358 if (!get_dc_list(lp_workgroup(), &ip_list, &count))
1362 * Firstly try and contact a PDC/BDC who has the same
1363 * network address as any of our interfaces.
1365 for(i = 0; i < count; i++) {
1366 if(!is_local_net(ip_list[i]))
1369 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1372 ip_list[i] = ipzero; /* Tried and failed. */
1376 * Secondly try and contact a random PDC/BDC.
1379 i = (sys_random() % count);
1381 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1382 ip_list[i] = ipzero; /* Tried and failed. */
1386 * Finally go through the IP list in turn, ignoring any addresses
1387 * we have already tried.
1391 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1392 * Note that from a WINS server the #1 IP address is the PDC.
1394 for(i = 0; i < count; i++) {
1395 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1401 free((char *)ip_list);
1404 return connected_ok;
1409 /***********************************************************************
1410 Do the same as security=server, but using NT Domain calls and a session
1411 key from the machine password.
1412 ************************************************************************/
1414 BOOL domain_client_validate( char *user, char *domain,
1415 char *smb_apasswd, int smb_apasslen,
1416 char *smb_ntpasswd, int smb_ntpasslen,
1419 unsigned char local_challenge[8];
1420 unsigned char local_lm_response[24];
1421 unsigned char local_nt_reponse[24];
1422 unsigned char trust_passwd[16];
1423 fstring remote_machine;
1425 NET_ID_INFO_CTR ctr;
1426 NET_USER_INFO_3 info3;
1427 struct cli_state cli;
1429 BOOL connected_ok = False;
1431 if(user_exists != NULL)
1432 *user_exists = True; /* Only set false on a very specific error. */
1435 * Check that the requested domain is not our own machine name.
1436 * If it is, we should never check the PDC here, we use our own local
1440 if(strequal( domain, global_myname)) {
1441 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1446 * Next, check that the passwords given were encrypted.
1449 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1450 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1453 * Not encrypted - do so.
1456 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1457 generate_random_buffer( local_challenge, 8, False);
1458 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1459 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1462 smb_apasswd = (char *)local_lm_response;
1463 smb_ntpasswd = (char *)local_nt_reponse;
1467 * Encrypted - get the challenge we sent for these
1471 if (!last_challenge(local_challenge)) {
1472 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1478 * Get the machine account password for our primary domain
1480 if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, NULL))
1486 * At this point, smb_apasswd points to the lanman response to
1487 * the challenge in local_challenge, and smb_ntpasswd points to
1488 * the NT response to the challenge in local_challenge. Ship
1489 * these over the secure channel to a domain controller and
1490 * see if they were valid.
1496 * Treat each name in the 'password server =' line as a potential
1497 * PDC/BDC. Contact each in turn and try and authenticate.
1500 pserver = lp_passwordserver();
1501 if (! *pserver) pserver = "*";
1504 while (!connected_ok &&
1505 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1506 if(strequal(remote_machine, "*")) {
1507 connected_ok = find_connect_pdc(&cli, trust_passwd);
1509 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1513 if (!connected_ok) {
1514 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1519 /* We really don't care what LUID we give the user. */
1520 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1522 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1523 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1524 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1525 &ctr, &info3) == False) {
1528 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1529 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1530 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1531 cli_nt_session_close(&cli);
1535 /* unused, so delete here. */
1536 if (info3.gids != NULL)
1539 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1540 *user_exists = False;
1545 /* unused, so delete here. */
1546 if (info3.gids != NULL)
1549 * Here, if we really want it, we have lots of info about the user in info3.
1554 * We don't actually need to do this - plus it fails currently with
1555 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1559 if(cli_nt_logoff(&cli, &ctr) == False) {
1560 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1561 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1562 cli_nt_session_close(&cli);
1569 cli_nt_session_close(&cli);