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;
95 static int next_vuid = VUID_OFFSET;
96 static int num_validated_vuids;
98 /****************************************************************************
99 check if a uid has been validated, and return an pointer to the user_struct
100 if it has. NULL if not. vuid is biased by an offset. This allows us to
101 tell random client vuid's (normally zero) from valid vuids.
102 ****************************************************************************/
103 user_struct *get_valid_user_struct(uint16 vuid)
108 if (vuid == UID_FIELD_INVALID)
111 for (usp=validated_users;usp;usp=usp->next,count++) {
112 if (vuid == usp->vuid) {
114 DLIST_PROMOTE(validated_users, usp);
122 /****************************************************************************
124 ****************************************************************************/
125 void invalidate_vuid(uint16 vuid)
127 user_struct *vuser = get_valid_user_struct(vuid);
132 DLIST_REMOVE(validated_users, vuser);
134 safe_free(vuser->groups);
135 delete_nt_token(&vuser->nt_user_token);
137 num_validated_vuids--;
140 /****************************************************************************
141 return a validated username
142 ****************************************************************************/
143 char *validated_username(uint16 vuid)
145 user_struct *vuser = get_valid_user_struct(vuid);
148 return(vuser->user.unix_name);
151 /****************************************************************************
152 return a validated domain
153 ****************************************************************************/
154 char *validated_domain(uint16 vuid)
156 user_struct *vuser = get_valid_user_struct(vuid);
159 return(vuser->user.domain);
163 /****************************************************************************
164 Create the SID list for this user.
165 ****************************************************************************/
167 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
169 extern DOM_SID global_sid_World;
170 extern DOM_SID global_sid_Network;
171 extern DOM_SID global_sid_Builtin_Guests;
172 extern DOM_SID global_sid_Authenticated_Users;
173 NT_USER_TOKEN *token;
179 if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
184 /* We always have uid/gid plus World and Network and Authenticated Users or Guest SIDs. */
185 num_sids = 5 + ngroups;
187 if ((token->user_sids = (DOM_SID *)malloc( num_sids*sizeof(DOM_SID))) == NULL) {
192 psids = token->user_sids;
195 * Note - user SID *MUST* be first in token !
196 * se_access_check depends on this.
199 uid_to_sid( &psids[psid_ndx++], uid);
202 * Primary group SID is second in token. Convention.
205 gid_to_sid( &psids[psid_ndx++], gid);
207 /* Now add the group SIDs. */
209 for (i = 0; i < ngroups; i++) {
210 if (groups[i] != gid) {
211 gid_to_sid( &psids[psid_ndx++], groups[i]);
216 * Finally add the "standard" SIDs.
217 * The only difference between guest and "anonymous" (which we
218 * don't really support) is the addition of Authenticated_Users.
221 sid_copy( &psids[psid_ndx++], &global_sid_World);
222 sid_copy( &psids[psid_ndx++], &global_sid_Network);
225 sid_copy( &psids[psid_ndx++], &global_sid_Builtin_Guests);
227 sid_copy( &psids[psid_ndx++], &global_sid_Authenticated_Users);
229 token->num_sids = psid_ndx;
231 /* Dump list of sids in token */
233 for (i = 0; i < token->num_sids; i++) {
234 DEBUG(5, ("user token sid %s\n",
235 sid_to_string(sid_str, &token->user_sids[i])));
241 /****************************************************************************
242 register a uid/name pair as being valid and that a valid password
243 has been given. vuid is biased by an offset. This allows us to
244 tell random client vuid's (normally zero) from valid vuids.
245 ****************************************************************************/
247 uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
248 char *domain,BOOL guest)
250 user_struct *vuser = NULL;
251 struct passwd *pwfile; /* for getting real name from passwd file */
253 /* Ensure no vuid gets registered in share level security. */
254 if(lp_security() == SEC_SHARE)
255 return UID_FIELD_INVALID;
257 /* Limit allowed vuids to 16bits - VUID_OFFSET. */
258 if (num_validated_vuids >= 0xFFFF-VUID_OFFSET)
259 return UID_FIELD_INVALID;
261 if((vuser = (user_struct *)malloc( sizeof(user_struct) )) == NULL) {
262 DEBUG(0,("Failed to malloc users struct!\n"));
263 return UID_FIELD_INVALID;
268 DEBUG(10,("register_vuid: (%u,%u) %s %s %s guest=%d\n", (unsigned int)uid, (unsigned int)gid,
269 unix_name, requested_name, domain, guest ));
271 /* Allocate a free vuid. Yes this is a linear search... :-) */
272 while( get_valid_user_struct(next_vuid) != NULL ) {
274 /* Check for vuid wrap. */
275 if (next_vuid == UID_FIELD_INVALID)
276 next_vuid = VUID_OFFSET;
279 DEBUG(10,("register_vuid: allocated vuid = %u\n", (unsigned int)next_vuid ));
281 vuser->vuid = next_vuid;
284 vuser->guest = guest;
285 fstrcpy(vuser->user.unix_name,unix_name);
286 fstrcpy(vuser->user.smb_name,requested_name);
287 fstrcpy(vuser->user.domain,domain);
290 vuser->groups = NULL;
292 /* Find all the groups this uid is in and store them.
293 Used by become_user() */
294 initialise_groups(unix_name, uid, gid);
295 get_current_groups( &vuser->n_groups, &vuser->groups);
297 /* Create an NT_USER_TOKEN struct for this user. */
298 vuser->nt_user_token = create_nt_token(uid,gid, vuser->n_groups, vuser->groups, guest);
301 num_validated_vuids++;
303 DLIST_ADD(validated_users, vuser);
305 DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
307 DEBUG(3, ("Clearing default real name\n"));
308 fstrcpy(vuser->user.full_name, "<Full Name>");
309 if (lp_unix_realname()) {
310 if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL) {
311 DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos));
312 fstrcpy(vuser->user.full_name, pwfile->pw_gecos);
316 memset(&vuser->dc, '\0', sizeof(vuser->dc));
322 /****************************************************************************
323 add a name to the session users list
324 ****************************************************************************/
325 void add_session_user(char *user)
328 StrnCpy(suser,user,sizeof(suser)-1);
330 if (!Get_Pwnam(suser,True)) return;
332 if (suser && *suser && !in_list(suser,session_users,False))
334 if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
335 DEBUG(1,("Too many session users??\n"));
338 pstrcat(session_users," ");
339 pstrcat(session_users,suser);
345 /****************************************************************************
346 update the encrypted smbpasswd file from the plaintext username and password
347 *****************************************************************************/
348 static BOOL update_smbpassword_file(char *user, char *password)
350 SAM_ACCOUNT *sampass = NULL;
354 sampass = pdb_getsampwnam(user);
357 if(sampass == NULL) {
358 DEBUG(0,("pdb_getsampwnam returned NULL\n"));
363 * Remove the account disabled flag - we are updating the
364 * users password from a login.
366 pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED);
368 /* Here, the flag is one, because we want to ignore the
369 XXXXXXX'd out password */
370 ret = change_oem_password( sampass, password, True);
372 DEBUG(3,("change_oem_password returned False\n"));
378 /****************************************************************************
379 core of smb password checking routine.
380 ****************************************************************************/
381 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
383 /* Finish the encryption of part_passwd. */
384 unsigned char p21[21];
385 unsigned char p24[24];
387 if (part_passwd == NULL)
389 DEBUG(10,("No password set - allowing access\n"));
391 /* No password set - always true ! */
396 memcpy(p21,part_passwd,16);
401 DEBUG(100,("Part password (P16) was |"));
402 for(i = 0; i < 16; i++)
403 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
405 DEBUG(100,("Password from client was |"));
406 for(i = 0; i < 24; i++)
407 DEBUG(100,("%X ", (unsigned char)password[i]));
409 DEBUG(100,("Given challenge was |"));
410 for(i = 0; i < 8; i++)
411 DEBUG(100,("%X ", (unsigned char)c8[i]));
413 DEBUG(100,("Value from encryption was |"));
414 for(i = 0; i < 24; i++)
415 DEBUG(100,("%X ", (unsigned char)p24[i]));
419 return (memcmp(p24, password, 24) == 0);
422 /****************************************************************************
423 Do a specific test for an smb password being correct, given a smb_password and
424 the lanman and NT responses.
425 ****************************************************************************/
426 BOOL smb_password_ok(SAM_ACCOUNT *sampass, uchar chal[8],
427 uchar lm_pass[24], uchar nt_pass[24])
433 if (!lm_pass || !sampass)
436 user_name = pdb_get_username(sampass);
438 DEBUG(4,("Checking SMB password for user %s\n",user_name));
440 if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
441 DEBUG(1,("account for user %s was disabled.\n", user_name));
447 DEBUG(5,("use last SMBnegprot challenge\n"));
448 if (!last_challenge(challenge))
450 DEBUG(1,("no challenge done - password failed\n"));
456 DEBUG(5,("challenge received\n"));
457 memcpy(challenge, chal, 8);
460 nt_pw = pdb_get_nt_passwd(sampass);
462 if ((Protocol >= PROTOCOL_NT1) && (nt_pw != NULL)) {
463 /* We have the NT MD4 hash challenge available - see if we can
464 use it (ie. does it exist in the smbpasswd file).
466 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
467 if (smb_password_check((char *)nt_pass, (uchar *)nt_pw, challenge))
469 DEBUG(4,("NT MD4 password check succeeded\n"));
472 DEBUG(4,("NT MD4 password check failed\n"));
475 /* Try against the lanman password. pdb_get_lanman_passwd(sampass) == NULL
476 means no password, allow access. */
478 DEBUG(4,("Checking LM MD4 password\n"));
480 lm_pw = pdb_get_lanman_passwd(sampass);
482 if((lm_pw == NULL) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ))
484 DEBUG(4,("no password required for user %s\n",user_name));
488 if((lm_pw != NULL) && smb_password_check((char *)lm_pass,(uchar *)lm_pw, challenge))
490 DEBUG(4,("LM MD4 password check succeeded\n"));
494 DEBUG(4,("LM MD4 password check failed\n"));
500 /****************************************************************************
501 check if a username/password is OK assuming the password is a 24 byte
503 return True if the password is correct, False otherwise
504 ****************************************************************************/
506 BOOL pass_check_smb(char *user, char *domain, uchar *chal,
507 uchar *lm_pwd, uchar *nt_pwd, struct passwd *pwd)
510 SAM_ACCOUNT *sampass;
512 if (!lm_pwd || !nt_pwd)
517 /* FIXME! this code looks to be unnecessary now that the passdb
518 validates that the username exists and has a valid uid */
519 if (pwd != NULL && user == NULL)
521 pass = (struct passwd *) pwd;
522 user = pass->pw_name;
526 /* I don't get this call here. I think it should be moved.
527 Need to check on it. --jerry */
528 pass = smb_getpwnam(user,True);
533 DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
537 /* get the account information */
538 sampass = pdb_getsampwnam(user);
541 DEBUG(1,("Couldn't find user '%s' in passdb file.\n", user));
545 /* Quit if the account was disabled. */
546 if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
547 DEBUG(1,("Account for user '%s' was disabled.\n", user));
551 /* Ensure the uid's match
552 FIXME! This also seems unnecessary --jerry */
554 if (smb_pass->smb_userid != pass->pw_uid)
556 DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
561 if (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)
563 if (lp_null_passwords())
565 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", user));
570 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", user));
575 if (smb_password_ok(sampass, chal, lm_pwd, nt_pwd))
580 DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
584 /****************************************************************************
585 check if a username/password pair is OK either via the system password
586 database or the encrypted SMB password database
587 return True if the password is correct, False otherwise
588 ****************************************************************************/
589 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
591 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
593 /* if 24 bytes long assume it is an encrypted password */
596 if (!last_challenge(challenge))
598 DEBUG(0,("Error: challenge not done for user=%s\n", user));
602 return pass_check_smb(user, global_myworkgroup,
603 challenge, (uchar *)password, (uchar *)password, pwd);
606 return pass_check(user, password, pwlen, pwd,
607 lp_update_encrypted() ?
608 update_smbpassword_file : NULL);
611 /****************************************************************************
612 check if a username is valid
613 ****************************************************************************/
614 BOOL user_ok(char *user,int snum)
616 pstring valid, invalid;
619 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
620 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
622 pstring_sub(valid,"%S",lp_servicename(snum));
623 pstring_sub(invalid,"%S",lp_servicename(snum));
625 ret = !user_in_list(user,invalid);
627 if (ret && valid && *valid) {
628 ret = user_in_list(user,valid);
631 if (ret && lp_onlyuser(snum)) {
632 char *user_list = lp_username(snum);
633 pstring_sub(user_list,"%S",lp_servicename(snum));
634 ret = user_in_list(user,user_list);
643 /****************************************************************************
644 validate a group username entry. Return the username or NULL
645 ****************************************************************************/
646 static char *validate_group(char *group,char *password,int pwlen,int snum)
650 char *host, *user, *domain;
652 while (getnetgrent(&host, &user, &domain)) {
654 if (user_ok(user, snum) &&
655 password_ok(user,password,pwlen,NULL)) {
669 while ((gptr = (struct group *)getgrent())) {
670 if (strequal(gptr->gr_name,group))
675 * As user_ok can recurse doing a getgrent(), we must
676 * copy the member list into a pstring on the stack before
677 * use. Bug pointed out by leon@eatworms.swmed.edu.
683 size_t copied_len = 0;
687 member = member_list;
689 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
690 size_t member_len = strlen(gptr->gr_mem[i]) + 1;
691 if( copied_len + member_len < sizeof(pstring)) {
693 DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
695 safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
696 copied_len += member_len;
697 member += copied_len;
705 member = member_list;
708 fstrcpy(name,member);
709 if (user_ok(name,snum) &&
710 password_ok(name,password,pwlen,NULL)) {
715 DEBUG(10,("validate_group = member = %s\n", member));
717 member += strlen(member) + 1;
730 /****************************************************************************
731 check for authority to login to a service with a given username/password
732 ****************************************************************************/
733 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
734 BOOL *guest,BOOL *force,uint16 vuid)
741 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
744 /* there are several possibilities:
745 1) login as the given user with given password
746 2) login as a previously registered username with the given password
747 3) login as a session list username with the given password
748 4) login as a previously validated user/password pair
749 5) login as the "user =" user with given password
750 6) login as the "user =" user with no password (guest connection)
751 7) login as guest user with no password
753 if the service is guest_only then steps 1 to 5 are skipped
756 if (GUEST_ONLY(snum)) *force = True;
758 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
761 user_struct *vuser = get_valid_user_struct(vuid);
763 /* check the given username and password */
764 if (!ok && (*user) && user_ok(user,snum)) {
765 ok = password_ok(user,password, pwlen, NULL);
766 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
769 /* check for a previously registered guest username */
770 if (!ok && (vuser != 0) && vuser->guest) {
771 if (user_ok(vuser->user.unix_name,snum) &&
772 password_ok(vuser->user.unix_name, password, pwlen, NULL)) {
773 fstrcpy(user, vuser->user.unix_name);
774 vuser->guest = False;
775 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
781 /* now check the list of session users */
785 char *user_list = strdup(session_users);
786 if (!user_list) return(False);
788 for (auser=strtok(user_list,LIST_SEP);
790 auser = strtok(NULL,LIST_SEP))
793 fstrcpy(user2,auser);
794 if (!user_ok(user2,snum)) continue;
796 if (password_ok(user2,password, pwlen, NULL)) {
799 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
805 /* check for a previously validated username/password pair */
806 if (!ok && (lp_security() > SEC_SHARE) &&
807 (vuser != 0) && !vuser->guest &&
808 user_ok(vuser->user.unix_name,snum)) {
809 fstrcpy(user,vuser->user.unix_name);
811 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
815 /* check for a rhosts entry */
816 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
818 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
821 /* check the user= fields and the given password */
822 if (!ok && lp_username(snum)) {
825 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
827 pstring_sub(user_list,"%S",lp_servicename(snum));
829 for (auser=strtok(user_list,LIST_SEP);
831 auser = strtok(NULL,LIST_SEP))
835 auser = validate_group(auser+1,password,pwlen,snum);
840 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
846 fstrcpy(user2,auser);
847 if (user_ok(user2,snum) &&
848 password_ok(user2,password,pwlen,NULL))
852 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
857 } /* not guest only */
859 /* check for a normal guest connection */
860 if (!ok && GUEST_OK(snum))
863 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
864 if (Get_Pwnam(guestname,True))
866 fstrcpy(user,guestname);
868 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
871 DEBUG(0,("Invalid guest account %s??\n",guestname));
875 if (ok && !user_ok(user,snum))
877 DEBUG(0,("rejected invalid user %s\n",user));
885 /****************************************************************************
886 read the a hosts.equiv or .rhosts file and check if it
887 allows this user from this machine
888 ****************************************************************************/
889 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
891 int plus_allowed = 1;
894 char **lines = file_lines_load(equiv_file, NULL, False);
897 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
898 if (! lines) return False;
899 for (i=0; lines[i]; i++) {
900 char *buf = lines[i];
901 trim_string(buf," "," ");
903 if (buf[0] != '#' && buf[0] != '\n')
905 BOOL is_group = False;
908 if (strcmp(buf, "NO_PLUS\n") == 0)
910 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
917 if (*bp == '\n' && plus_allowed)
919 /* a bare plus means everbody allowed */
920 DEBUG(6, ("check_user_equiv everybody allowed\n"));
921 file_lines_free(lines);
925 else if (buf[0] == '-')
935 file_host = strtok(bp, " \t\n");
936 file_user = strtok(NULL, " \t\n");
937 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
938 file_user ? file_user : "(null)" ));
939 if (file_host && *file_host)
941 BOOL host_ok = False;
943 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
946 static char *mydomain = NULL;
948 yp_get_default_domain(&mydomain);
949 if (mydomain && innetgr(file_host,remote,user,mydomain))
955 DEBUG(1,("Netgroups not configured\n"));
960 /* is it this host */
961 /* the fact that remote has come from a call of gethostbyaddr
962 * means that it may have the fully qualified domain name
963 * so we could look up the file version to get it into
964 * a canonical form, but I would rather just type it
965 * in full in the equiv file
967 if (!host_ok && !is_group && strequal(remote, file_host))
973 /* is it this user */
974 if (file_user == 0 || strequal(user, file_user))
976 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
977 (plus ? "+" : "-"), file_host,
978 (file_user ? file_user : "")));
979 file_lines_free(lines);
980 return (plus ? True : False);
986 file_lines_free(lines);
991 /****************************************************************************
992 check for a possible hosts equiv or rhosts entry for the user
993 ****************************************************************************/
994 BOOL check_hosts_equiv(char *user)
998 struct passwd *pass = Get_Pwnam(user,True);
1003 fname = lp_hosts_equiv();
1005 /* note: don't allow hosts.equiv on root */
1006 if (fname && *fname && (pass->pw_uid != 0)) {
1007 if (check_user_equiv(user,client_name(),fname))
1011 if (lp_use_rhosts())
1013 char *home = get_user_home_dir(user);
1015 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
1016 if (check_user_equiv(user,client_name(),rhostsfile))
1025 /****************************************************************************
1026 Return the client state structure.
1027 ****************************************************************************/
1029 struct cli_state *server_client(void)
1031 static struct cli_state pw_cli;
1035 /****************************************************************************
1036 Support for server level security.
1037 ****************************************************************************/
1039 struct cli_state *server_cryptkey(void)
1041 struct cli_state *cli;
1043 struct in_addr dest_ip;
1045 BOOL connected_ok = False;
1047 cli = server_client();
1049 if (!cli_initialise(cli))
1052 pserver = strdup(lp_passwordserver());
1055 while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
1056 standard_sub_basic(desthost);
1059 if(!resolve_name( desthost, &dest_ip, 0x20)) {
1060 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
1064 if (ismyip(dest_ip)) {
1065 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
1069 if (cli_connect(cli, desthost, &dest_ip)) {
1070 DEBUG(3,("connected to password server %s\n",desthost));
1071 connected_ok = True;
1078 if (!connected_ok) {
1079 DEBUG(0,("password server not available\n"));
1084 if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
1087 DEBUG(3,("got session\n"));
1089 if (!cli_negprot(cli)) {
1090 DEBUG(1,("%s rejected the negprot\n",desthost));
1095 if (cli->protocol < PROTOCOL_LANMAN2 ||
1096 !(cli->sec_mode & 1)) {
1097 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1102 DEBUG(3,("password server OK\n"));
1107 /****************************************************************************
1108 Validate a password with the password server.
1109 ****************************************************************************/
1111 BOOL server_validate(char *user, char *domain,
1112 char *pass, int passlen,
1113 char *ntpass, int ntpasslen)
1115 struct cli_state *cli;
1116 static unsigned char badpass[24];
1117 static BOOL tested_password_server = False;
1118 static BOOL bad_password_server = False;
1120 cli = server_client();
1122 if (!cli->initialised) {
1123 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1128 memset(badpass, 0x1f, sizeof(badpass));
1130 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1132 * Very unlikely, our random bad password is the same as the users
1134 memset(badpass, badpass[0]+1, sizeof(badpass));
1138 * Attempt a session setup with a totally incorrect password.
1139 * If this succeeds with the guest bit *NOT* set then the password
1140 * server is broken and is not correctly setting the guest bit. We
1141 * need to detect this as some versions of NT4.x are broken. JRA.
1144 if(!tested_password_server) {
1145 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1146 (char *)badpass, sizeof(badpass), domain)) {
1149 * We connected to the password server so we
1150 * can say we've tested it.
1152 tested_password_server = True;
1154 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1155 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1156 with a bad password.\n", cli->desthost));
1157 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1158 use this machine as the password server.\n"));
1162 * Password server has the bug.
1164 bad_password_server = True;
1172 * We have already tested the password server.
1173 * Fail immediately if it has the bug.
1176 if(bad_password_server) {
1177 DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
1178 with a bad password.\n", cli->desthost));
1179 DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
1180 use this machine as the password server.\n"));
1186 * Now we know the password server will correctly set the guest bit, or is
1187 * not guest enabled, we can try with the real password.
1190 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1191 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1195 /* if logged in as guest then reject */
1196 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1197 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1207 /***********************************************************************
1208 Connect to a remote machine for domain security authentication
1209 given a name or IP address.
1210 ************************************************************************/
1212 static BOOL connect_to_domain_password_server(struct cli_state *pcli,
1214 unsigned char *trust_passwd)
1216 struct in_addr dest_ip;
1217 fstring remote_machine;
1219 if(cli_initialise(pcli) == False) {
1220 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
1224 if (is_ipaddress(server)) {
1225 struct in_addr to_ip;
1227 /* we shouldn't have 255.255.255.255 forthe IP address of
1228 a password server anyways */
1229 if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
1230 DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
1234 if (!name_status_find(0x20, to_ip, remote_machine)) {
1235 DEBUG(0, ("connect_to_domain_password_server: Can't "
1236 "resolve name for IP %s\n", server));
1240 fstrcpy(remote_machine, server);
1243 standard_sub_basic(remote_machine);
1244 strupper(remote_machine);
1246 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1247 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
1252 if (ismyip(dest_ip)) {
1253 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
1259 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
1260 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
1261 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1266 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
1267 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
1268 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1272 pcli->protocol = PROTOCOL_NT1;
1274 if (!cli_negprot(pcli)) {
1275 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
1276 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1281 if (pcli->protocol != PROTOCOL_NT1) {
1282 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
1289 * Do an anonymous session setup.
1292 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
1293 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
1294 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1299 if (!(pcli->sec_mode & 1)) {
1300 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
1306 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
1307 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
1308 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
1314 * We now have an anonymous connection to IPC$ on the domain password server.
1318 * Even if the connect succeeds we need to setup the netlogon
1319 * pipe here. We do this as we may just have changed the domain
1320 * account password on the PDC and yet we may be talking to
1321 * a BDC that doesn't have this replicated yet. In this case
1322 * a successful connect to a DC needs to take the netlogon connect
1323 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
1326 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
1327 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
1328 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1329 cli_nt_session_close(pcli);
1335 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
1336 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
1337 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
1338 cli_nt_session_close(pcli);
1347 /***********************************************************************
1348 Utility function to attempt a connection to an IP address of a DC.
1349 ************************************************************************/
1351 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
1356 * Ignore addresses we have already tried.
1359 if (ip_equal(ipzero, *ip))
1362 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
1365 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
1370 /***********************************************************************
1371 We have been asked to dynamcially determine the IP addresses of
1372 the PDC and BDC's for this DOMAIN, and query them in turn.
1373 ************************************************************************/
1374 static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd, time_t last_change_time)
1376 struct in_addr *ip_list = NULL;
1379 BOOL connected_ok = False;
1380 time_t time_now = time(NULL);
1381 BOOL use_pdc_only = False;
1384 * If the time the machine password has changed
1385 * was less than an hour ago then we need to contact
1386 * the PDC only, as we cannot be sure domain replication
1387 * has yet taken place. Bug found by Gerald (way to go
1391 if (time_now - last_change_time < 3600)
1392 use_pdc_only = True;
1394 if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count))
1398 * Firstly try and contact a PDC/BDC who has the same
1399 * network address as any of our interfaces.
1401 for(i = 0; i < count; i++) {
1402 if(!is_local_net(ip_list[i]))
1405 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1408 ip_list[i] = ipzero; /* Tried and failed. */
1412 * Secondly try and contact a random PDC/BDC.
1415 i = (sys_random() % count);
1417 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1418 ip_list[i] = ipzero; /* Tried and failed. */
1422 * Finally go through the IP list in turn, ignoring any addresses
1423 * we have already tried.
1427 * Try and connect to any of the other IP addresses in the PDC/BDC list.
1428 * Note that from a WINS server the #1 IP address is the PDC.
1430 for(i = 0; i < count; i++) {
1431 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
1437 free((char *)ip_list);
1440 return connected_ok;
1445 /***********************************************************************
1446 Do the same as security=server, but using NT Domain calls and a session
1447 key from the machine password.
1448 ************************************************************************/
1450 BOOL domain_client_validate( char *user, char *domain,
1451 char *smb_apasswd, int smb_apasslen,
1452 char *smb_ntpasswd, int smb_ntpasslen,
1455 unsigned char local_challenge[8];
1456 unsigned char local_lm_response[24];
1457 unsigned char local_nt_response[24];
1458 unsigned char trust_passwd[16];
1459 fstring remote_machine;
1461 NET_ID_INFO_CTR ctr;
1462 NET_USER_INFO_3 info3;
1463 struct cli_state cli;
1465 BOOL connected_ok = False;
1466 time_t last_change_time;
1468 if(user_exists != NULL)
1469 *user_exists = True; /* Only set false on a very specific error. */
1472 * Check that the requested domain is not our own machine name.
1473 * If it is, we should never check the PDC here, we use our own local
1477 if(strequal( domain, global_myname)) {
1478 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1483 * Next, check that the passwords given were encrypted.
1486 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1487 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1490 * Not encrypted - do so.
1493 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1494 generate_random_buffer( local_challenge, 8, False);
1495 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1496 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_response);
1499 smb_apasswd = (char *)local_lm_response;
1500 smb_ntpasswd = (char *)local_nt_response;
1504 * Encrypted - get the challenge we sent for these
1508 if (!last_challenge(local_challenge)) {
1509 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1515 * Get the machine account password for our primary domain
1517 if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
1519 DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
1524 * At this point, smb_apasswd points to the lanman response to
1525 * the challenge in local_challenge, and smb_ntpasswd points to
1526 * the NT response to the challenge in local_challenge. Ship
1527 * these over the secure channel to a domain controller and
1528 * see if they were valid.
1534 * Treat each name in the 'password server =' line as a potential
1535 * PDC/BDC. Contact each in turn and try and authenticate.
1538 pserver = lp_passwordserver();
1539 if (! *pserver) pserver = "*";
1542 while (!connected_ok &&
1543 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1544 if(strequal(remote_machine, "*")) {
1545 connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
1547 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
1551 if (!connected_ok) {
1552 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1557 /* We really don't care what LUID we give the user. */
1558 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1562 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1563 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1564 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1565 &ctr, &info3) == False) {
1568 cli_error(&cli, NULL, NULL, &nt_rpc_err);
1569 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1570 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1571 cli_nt_session_close(&cli);
1575 if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
1576 *user_exists = False;
1582 * Here, if we really want it, we have lots of info about the user in info3.
1587 * We don't actually need to do this - plus it fails currently with
1588 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1592 if(cli_nt_logoff(&cli, &ctr) == False) {
1593 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1594 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1595 cli_nt_session_close(&cli);
1602 /* Note - once the cli stream is shutdown the mem_ctx used
1603 to allocate the other_sids and gids structures has been deleted - so
1604 these pointers are no longer valid..... */
1606 cli_nt_session_close(&cli);