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;
27 /* users from session setup */
28 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))
166 DEBUG(0,("Unable to initgroups!\n"));
167 if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000)
169 DEBUG(0,("This is probably a problem with the account %s\n", user));
175 ngroups = sys_getgroups(0,&grp);
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=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"));
326 /* Here, the flag is one, because we want to ignore the
327 XXXXXXX'd out password */
328 ret = change_oem_password( smbpw, password, True);
330 DEBUG(3,("change_oem_password returned False\n"));
340 /****************************************************************************
341 core of smb password checking routine.
342 ****************************************************************************/
343 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
345 /* Finish the encryption of part_passwd. */
346 unsigned char p21[21];
347 unsigned char p24[24];
349 if (part_passwd == NULL)
350 DEBUG(10,("No password set - allowing access\n"));
351 /* No password set - always true ! */
352 if (part_passwd == NULL)
356 memcpy(p21,part_passwd,16);
361 DEBUG(100,("Part password (P16) was |"));
362 for(i = 0; i < 16; i++)
363 DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
365 DEBUG(100,("Password from client was |"));
366 for(i = 0; i < 24; i++)
367 DEBUG(100,("%X ", (unsigned char)password[i]));
369 DEBUG(100,("Given challenge was |"));
370 for(i = 0; i < 8; i++)
371 DEBUG(100,("%X ", (unsigned char)c8[i]));
373 DEBUG(100,("Value from encryption was |"));
374 for(i = 0; i < 24; i++)
375 DEBUG(100,("%X ", (unsigned char)p24[i]));
379 return (memcmp(p24, password, 24) == 0);
382 /****************************************************************************
383 Do a specific test for an smb password being correct, given a smb_password and
384 the lanman and NT responses.
385 ****************************************************************************/
387 BOOL smb_password_ok(struct smb_passwd *smb_pass,
388 uchar lm_pass[24], uchar nt_pass[24])
392 if (!lm_pass || !smb_pass) return(False);
394 DEBUG(4,("Checking SMB password for user %s\n",
395 smb_pass->smb_name));
397 if(smb_pass->acct_ctrl & ACB_DISABLED) {
398 DEBUG(3,("account for user %s was disabled.\n",
399 smb_pass->smb_name));
403 if (!last_challenge(challenge)) {
404 DEBUG(1,("no challenge done - password failed\n"));
408 if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
409 /* We have the NT MD4 hash challenge available - see if we can
410 use it (ie. does it exist in the smbpasswd file).
412 DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
413 if (smb_password_check((char *)nt_pass,
414 (uchar *)smb_pass->smb_nt_passwd,
416 DEBUG(4,("NT MD4 password check succeeded\n"));
419 DEBUG(4,("NT MD4 password check failed\n"));
422 /* Try against the lanman password. smb_pass->smb_passwd == NULL means
423 no password, allow access. */
425 DEBUG(4,("Checking LM MD4 password\n"));
427 if((smb_pass->smb_passwd == NULL) &&
428 (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
429 DEBUG(4,("no password required for user %s\n",
430 smb_pass->smb_name));
434 if((smb_pass->smb_passwd != NULL) &&
435 smb_password_check((char *)lm_pass,
436 (uchar *)smb_pass->smb_passwd, challenge)) {
437 DEBUG(4,("LM MD4 password check succeeded\n"));
441 DEBUG(4,("LM MD4 password check failed\n"));
447 /****************************************************************************
448 check if a username/password is OK assuming the password is a 24 byte
450 return True if the password is correct, False otherwise
451 ****************************************************************************/
452 BOOL pass_check_smb(char *user, char *domain,
453 char *challenge, char *lm_pwd, char *nt_pwd,
457 struct smb_passwd *smb_pass;
459 if (!lm_pwd || !nt_pwd)
464 if (pwd != NULL && user == NULL)
466 pass = (struct passwd *) pwd;
467 user = pass->pw_name;
471 pass = Get_Pwnam(user,True);
476 DEBUG(3,("Couldn't find user %s\n",user));
480 smb_pass = getsmbpwnam(user);
482 if (smb_pass == NULL)
484 DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
488 /* Quit if the account was disabled. */
489 if(smb_pass->acct_ctrl & ACB_DISABLED) {
490 DEBUG(3,("account for user %s was disabled.\n", user));
494 /* Ensure the uid's match */
495 if (smb_pass->smb_userid != pass->pw_uid)
497 DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
501 if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
503 DEBUG(3,("account for user %s has no password and null passwords are allowed.\n", smb_pass->smb_name));
507 if (smb_password_ok(smb_pass, (uchar *)lm_pwd, (uchar *)nt_pwd))
512 DEBUG(3,("Error smb_password_check failed\n"));
516 /****************************************************************************
517 check if a username/password pair is OK either via the system password
518 database or the encrypted SMB password database
519 return True if the password is correct, False otherwise
520 ****************************************************************************/
521 BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
523 if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
525 /* if 24 bytes long assume it is an encrypted password */
528 if (!last_challenge(challenge))
530 DEBUG(0,("Error: challenge not done for user=%s\n", user));
534 return pass_check_smb(user, global_myworkgroup,
535 challenge, password, password, pwd);
538 return pass_check(user, password, pwlen, pwd,
539 lp_update_encrypted() ?
540 update_smbpassword_file : NULL);
543 /****************************************************************************
544 check if a username is valid
545 ****************************************************************************/
546 BOOL user_ok(char *user,int snum)
548 pstring valid, invalid;
551 StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
552 StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
554 string_sub(valid,"%S",lp_servicename(snum));
555 string_sub(invalid,"%S",lp_servicename(snum));
557 ret = !user_in_list(user,invalid);
559 if (ret && valid && *valid) {
560 ret = user_in_list(user,valid);
563 if (ret && lp_onlyuser(snum)) {
564 char *user_list = lp_username(snum);
565 string_sub(user_list,"%S",lp_servicename(snum));
566 ret = user_in_list(user,user_list);
575 /****************************************************************************
576 validate a group username entry. Return the username or NULL
577 ****************************************************************************/
578 static char *validate_group(char *group,char *password,int pwlen,int snum)
582 char *host, *user, *domain;
584 while (getnetgrent(&host, &user, &domain)) {
586 if (user_ok(user, snum) &&
587 password_ok(user,password,pwlen,NULL)) {
599 struct group *gptr = (struct group *)getgrnam(group);
603 member = gptr->gr_mem;
604 while (member && *member)
607 fstrcpy(name,*member);
608 if (user_ok(name,snum) &&
609 password_ok(name,password,pwlen,NULL))
613 #ifdef GROUP_CHECK_PWENT
619 while (pwd = getpwent ()) {
620 if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
621 /* This Entry have PASSWORD and same GID then check pwd */
622 if (password_ok(NULL, password, pwlen, pwd)) {
623 fstrcpy(tm, pwd->pw_name);
631 #endif /* GROUP_CHECK_PWENT */
640 /****************************************************************************
641 check for authority to login to a service with a given username/password
642 ****************************************************************************/
643 BOOL authorise_login(int snum,char *user,char *password, int pwlen,
644 BOOL *guest,BOOL *force,uint16 vuid)
651 DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
654 /* there are several possibilities:
655 1) login as the given user with given password
656 2) login as a previously registered username with the given password
657 3) login as a session list username with the given password
658 4) login as a previously validated user/password pair
659 5) login as the "user =" user with given password
660 6) login as the "user =" user with no password (guest connection)
661 7) login as guest user with no password
663 if the service is guest_only then steps 1 to 5 are skipped
666 if (GUEST_ONLY(snum)) *force = True;
668 if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
671 user_struct *vuser = get_valid_user_struct(vuid);
673 /* check the given username and password */
674 if (!ok && (*user) && user_ok(user,snum)) {
675 ok = password_ok(user,password, pwlen, NULL);
676 if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
679 /* check for a previously registered guest username */
680 if (!ok && (vuser != 0) && vuser->guest) {
681 if (user_ok(vuser->name,snum) &&
682 password_ok(vuser->name, password, pwlen, NULL)) {
683 fstrcpy(user, vuser->name);
684 vuser->guest = False;
685 DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
691 /* now check the list of session users */
695 char *user_list = strdup(session_users);
696 if (!user_list) return(False);
698 for (auser=strtok(user_list,LIST_SEP);
700 auser = strtok(NULL,LIST_SEP))
703 fstrcpy(user2,auser);
704 if (!user_ok(user2,snum)) continue;
706 if (password_ok(user2,password, pwlen, NULL)) {
709 DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
715 /* check for a previously validated username/password pair */
716 if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
717 (vuser != 0) && !vuser->guest &&
718 user_ok(vuser->name,snum)) {
719 fstrcpy(user,vuser->name);
721 DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
725 /* check for a rhosts entry */
726 if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
728 DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
731 /* check the user= fields and the given password */
732 if (!ok && lp_username(snum)) {
735 StrnCpy(user_list,lp_username(snum),sizeof(pstring));
737 string_sub(user_list,"%S",lp_servicename(snum));
739 for (auser=strtok(user_list,LIST_SEP);
741 auser = strtok(NULL,LIST_SEP))
745 auser = validate_group(auser+1,password,pwlen,snum);
750 DEBUG(3,("ACCEPTED: group username and given password ok\n"));
756 fstrcpy(user2,auser);
757 if (user_ok(user2,snum) &&
758 password_ok(user2,password,pwlen,NULL))
762 DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
767 } /* not guest only */
769 /* check for a normal guest connection */
770 if (!ok && GUEST_OK(snum))
773 StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
774 if (Get_Pwnam(guestname,True))
776 fstrcpy(user,guestname);
778 DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
781 DEBUG(0,("Invalid guest account %s??\n",guestname));
786 if (ok && !user_ok(user,snum))
788 DEBUG(0,("rejected invalid user %s\n",user));
796 /****************************************************************************
797 read the a hosts.equiv or .rhosts file and check if it
798 allows this user from this machine
799 ****************************************************************************/
800 static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
803 int plus_allowed = 1;
806 FILE *fp = fopen(equiv_file, "r");
807 DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
808 if (! fp) return False;
809 while(fgets(buf, sizeof(buf), fp))
811 trim_string(buf," "," ");
813 if (buf[0] != '#' && buf[0] != '\n')
815 BOOL is_group = False;
818 if (strcmp(buf, "NO_PLUS\n") == 0)
820 DEBUG(6, ("check_user_equiv NO_PLUS\n"));
827 if (*bp == '\n' && plus_allowed)
829 /* a bare plus means everbody allowed */
830 DEBUG(6, ("check_user_equiv everybody allowed\n"));
835 else if (buf[0] == '-')
845 file_host = strtok(bp, " \t\n");
846 file_user = strtok(NULL, " \t\n");
847 DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
848 file_user ? file_user : "(null)" ));
849 if (file_host && *file_host)
851 BOOL host_ok = False;
853 #if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
856 static char *mydomain = NULL;
858 yp_get_default_domain(&mydomain);
859 if (mydomain && innetgr(file_host,remote,user,mydomain))
865 DEBUG(1,("Netgroups not configured\n"));
870 /* is it this host */
871 /* the fact that remote has come from a call of gethostbyaddr
872 * means that it may have the fully qualified domain name
873 * so we could look up the file version to get it into
874 * a canonical form, but I would rather just type it
875 * in full in the equiv file
877 if (!host_ok && !is_group && strequal(remote, file_host))
883 /* is it this user */
884 if (file_user == 0 || strequal(user, file_user))
887 DEBUG(5, ("check_user_equiv matched %s%s %s\n",
888 (plus ? "+" : "-"), file_host,
889 (file_user ? file_user : "")));
890 return (plus ? True : False);
901 /****************************************************************************
902 check for a possible hosts equiv or rhosts entry for the user
903 ****************************************************************************/
904 BOOL check_hosts_equiv(char *user)
908 struct passwd *pass = Get_Pwnam(user,True);
913 fname = lp_hosts_equiv();
915 /* note: don't allow hosts.equiv on root */
916 if (fname && *fname && (pass->pw_uid != 0)) {
918 if (check_user_equiv(user,client_name(Client),fname))
924 char *home = get_home_dir(user);
927 slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
928 if (check_user_equiv(user,client_name(Client),rhostsfile))
937 /****************************************************************************
938 return the client state structure
939 ****************************************************************************/
940 struct cli_state *server_client(void)
942 static struct cli_state pw_cli;
946 /****************************************************************************
947 support for server level security
948 ****************************************************************************/
949 struct cli_state *server_cryptkey(void)
951 struct cli_state *cli;
953 struct in_addr dest_ip;
954 extern fstring local_machine;
956 BOOL connected_ok = False;
957 struct nmb_name calling, called;
959 cli = server_client();
961 if (!cli_initialise(cli))
964 p = lp_passwordserver();
965 while(p && next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
966 standard_sub_basic(desthost);
969 if(!resolve_name( desthost, &dest_ip, 0x20)) {
970 DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
974 if (ismyip(dest_ip)) {
975 DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
979 if (cli_connect(cli, desthost, &dest_ip)) {
980 DEBUG(3,("connected to password server %s\n",desthost));
987 DEBUG(0,("password server not available\n"));
992 make_nmb_name(&calling, local_machine, 0x0 , scope);
993 make_nmb_name(&called , desthost , 0x20, scope);
995 if (!cli_session_request(cli, &calling, &called))
997 DEBUG(1,("%s rejected the session\n",desthost));
1002 DEBUG(3,("got session\n"));
1004 if (!cli_negprot(cli)) {
1005 DEBUG(1,("%s rejected the negprot\n",desthost));
1010 if (cli->protocol < PROTOCOL_LANMAN2 ||
1011 !(cli->sec_mode & 1)) {
1012 DEBUG(1,("%s isn't in user level security mode\n",desthost));
1017 DEBUG(3,("password server OK\n"));
1022 /****************************************************************************
1023 validate a password with the password server
1024 ****************************************************************************/
1025 BOOL server_validate(char *user, char *domain,
1026 char *pass, int passlen,
1027 char *ntpass, int ntpasslen)
1029 struct cli_state *cli;
1030 extern fstring local_machine;
1031 static unsigned char badpass[24];
1032 cli = server_client();
1034 if (!cli->initialised) {
1035 DEBUG(1,("password server %s is not connected\n", cli->desthost));
1039 if(badpass[0] == 0) {
1040 memset(badpass, 0x1f, sizeof(badpass));
1043 if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
1044 /* Very unlikely, our random bad password is the same as the users
1046 memset(badpass, badpass[0]+1, sizeof(badpass));
1050 * Attempt a session setup with a totally incorrect password.
1051 * If this succeeds with the guest bit *NOT* set then the password
1052 * server is broken and is not correctly setting the guest bit. We
1053 * need to detect this as some versions of NT4.x are broken. JRA.
1056 if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
1057 (char *)badpass, sizeof(badpass), domain)) {
1058 if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
1059 DEBUG(0,("server_validate: password server %s allows users as non-guest \
1060 with a bad password.\n", cli->desthost));
1061 DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
1062 use this machine as the password server.\n"));
1070 * Now we know the password server will correctly set the guest bit, or is
1071 * not guest enabled, we can try with the real password.
1074 if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
1075 DEBUG(1,("password server %s rejected the password\n", cli->desthost));
1079 /* if logged in as guest then reject */
1080 if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
1081 DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
1087 * This patch from Rob Nielsen <ran@adc.com> makes doing
1088 * the NetWksaUserLogon a dynamic, rather than compile-time
1089 * parameter, defaulting to on. This is somewhat dangerous
1090 * as it allows people to turn off this neccessary check,
1091 * but so many people have had problems with this that I
1092 * think it is a neccessary change. JRA.
1095 if (lp_net_wksta_user_logon()) {
1096 DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", cli->desthost));
1098 if (!cli_send_tconX(cli, "IPC$", "IPC", "", 1)) {
1099 DEBUG(0,("password server %s refused IPC$ connect\n", cli->desthost));
1104 if (!cli_NetWkstaUserLogon(cli,user,local_machine)) {
1105 DEBUG(0,("password server %s failed NetWkstaUserLogon\n", cli->desthost));
1111 if (cli->privilages == 0) {
1112 DEBUG(0,("password server %s gave guest privilages\n", cli->desthost));
1118 if (!strequal(cli->eff_name, user)) {
1119 DEBUG(0,("password server %s gave different username %s\n",
1129 DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", cli->desthost));
1132 DEBUG(3,("password server %s accepted the password\n", cli->desthost));
1139 /***********************************************************************
1140 Do the same as security=server, but using NT Domain calls and a session
1141 key from the machine password.
1142 ************************************************************************/
1144 BOOL domain_client_validate( char *user, char *domain,
1145 char *smb_apasswd, int smb_apasslen,
1146 char *smb_ntpasswd, int smb_ntpasslen)
1148 unsigned char local_challenge[8];
1149 unsigned char local_lm_response[24];
1150 unsigned char local_nt_reponse[24];
1151 unsigned char trust_passwd[16];
1152 fstring remote_machine;
1154 struct in_addr dest_ip;
1155 NET_ID_INFO_CTR ctr;
1156 NET_USER_INFO_3 info3;
1157 struct cli_state cli;
1159 BOOL connected_ok = False;
1160 struct nmb_name calling, called;
1163 * Check that the requested domain is not our own machine name.
1164 * If it is, we should never check the PDC here, we use our own local
1168 if(strequal( domain, global_myname)) {
1169 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
1174 * Next, check that the passwords given were encrypted.
1177 if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
1178 ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
1181 * Not encrypted - do so.
1184 DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
1185 generate_random_buffer( local_challenge, 8, False);
1186 SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
1187 SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
1190 smb_apasswd = (char *)local_lm_response;
1191 smb_ntpasswd = (char *)local_nt_reponse;
1195 * Encrypted - get the challenge we sent for these
1199 if (!last_challenge(local_challenge)) {
1200 DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
1206 * Get the machine account password.
1208 if (!trust_get_passwd( trust_passwd, global_myworkgroup, global_myname))
1214 * At this point, smb_apasswd points to the lanman response to
1215 * the challenge in local_challenge, and smb_ntpasswd points to
1216 * the NT response to the challenge in local_challenge. Ship
1217 * these over the secure channel to a domain controller and
1218 * see if they were valid.
1223 if(cli_initialise(&cli) == False) {
1224 DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
1229 * Treat each name in the 'password server =' line as a potential
1230 * PDC/BDC. Contact each in turn and try and authenticate.
1233 p = lp_passwordserver();
1234 while(p && next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
1236 standard_sub_basic(remote_machine);
1237 strupper(remote_machine);
1239 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
1240 DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
1244 if (ismyip(dest_ip)) {
1245 DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
1249 if (!cli_connect(&cli, remote_machine, &dest_ip)) {
1250 DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
1251 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1255 make_nmb_name(&calling, global_myname , 0x0 , scope);
1256 make_nmb_name(&called , remote_machine, 0x20, scope);
1258 if (!cli_session_request(&cli, &calling, &called))
1260 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1261 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1266 cli.protocol = PROTOCOL_NT1;
1268 if (!cli_negprot(&cli)) {
1269 DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
1270 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1275 if (cli.protocol != PROTOCOL_NT1) {
1276 DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
1283 * Do an anonymous session setup.
1286 if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
1287 DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
1288 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1293 if (!(cli.sec_mode & 1)) {
1294 DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
1300 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
1301 DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
1302 Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
1308 * We have an anonymous connection to IPC$.
1310 connected_ok = True;
1314 if (!connected_ok) {
1315 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
1321 * Ok - we have an anonymous connection to the IPC$ share.
1322 * Now start the NT Domain stuff :-).
1325 if(cli_nt_session_open(&cli, PIPE_NETLOGON) == False) {
1326 DEBUG(0,("domain_client_validate: unable to open the domain client session to \
1327 machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1328 cli_nt_session_close(&cli);
1334 if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
1335 DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
1336 %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
1337 cli_nt_session_close(&cli);
1343 /* We really don't care what LUID we give the user. */
1344 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
1346 if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
1347 ((smb_apasslen != 0) ? smb_apasswd : NULL),
1348 ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
1349 &ctr, &info3) == False) {
1350 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
1351 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1352 cli_nt_session_close(&cli);
1359 * Here, if we really want it, we have lots of info about the user in info3.
1364 * We don't actually need to do this - plus it fails currently with
1365 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
1369 if(cli_nt_logoff(&cli, &ctr) == False) {
1370 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
1371 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
1372 cli_nt_session_close(&cli);
1379 cli_nt_session_close(&cli);