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https://github.com/samba-team/samba.git
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f35157f392
I did some basic tests but I have probably broken something. Notably the
password changing. So don't cry ;-)
J.F.
(This used to be commit a4a4c02b12
)
1655 lines
46 KiB
C
1655 lines
46 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 1.9.
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Password and authentication handling
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Copyright (C) Andrew Tridgell 1992-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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extern int DEBUGLEVEL;
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extern int Protocol;
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extern struct in_addr ipzero;
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/* users from session setup */
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static pstring session_users="";
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extern pstring global_myname;
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extern fstring global_myworkgroup;
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/* Data to do lanman1/2 password challenge. */
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static unsigned char saved_challenge[8];
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static BOOL challenge_sent=False;
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/*******************************************************************
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Get the next challenge value - no repeats.
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********************************************************************/
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void generate_next_challenge(char *challenge)
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{
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#if 0
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/*
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* Leave this ifdef'd out while we test
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* the new crypto random number generator.
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* JRA.
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*/
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unsigned char buf[16];
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static int counter = 0;
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struct timeval tval;
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int v1,v2;
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/* get a sort-of random number */
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GetTimeOfDay(&tval);
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v1 = (counter++) + sys_getpid() + tval.tv_sec;
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v2 = (counter++) * sys_getpid() + tval.tv_usec;
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SIVAL(challenge,0,v1);
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SIVAL(challenge,4,v2);
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/* mash it up with md4 */
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mdfour(buf, (unsigned char *)challenge, 8);
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#else
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unsigned char buf[8];
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generate_random_buffer(buf,8,False);
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#endif
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memcpy(saved_challenge, buf, 8);
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memcpy(challenge,buf,8);
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challenge_sent = True;
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}
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/*******************************************************************
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set the last challenge sent, usually from a password server
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********************************************************************/
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BOOL set_challenge(unsigned char *challenge)
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{
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memcpy(saved_challenge,challenge,8);
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challenge_sent = True;
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return(True);
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}
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/*******************************************************************
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get the last challenge sent
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********************************************************************/
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static BOOL last_challenge(unsigned char *challenge)
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{
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if (!challenge_sent) return(False);
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memcpy(challenge,saved_challenge,8);
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return(True);
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}
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/* this holds info on user ids that are already validated for this VC */
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static user_struct *validated_users;
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static int next_vuid = VUID_OFFSET;
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static int num_validated_vuids;
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/****************************************************************************
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check if a uid has been validated, and return an pointer to the user_struct
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if it has. NULL if not. vuid is biased by an offset. This allows us to
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tell random client vuid's (normally zero) from valid vuids.
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****************************************************************************/
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user_struct *get_valid_user_struct(uint16 vuid)
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{
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user_struct *usp;
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int count=0;
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if (vuid == UID_FIELD_INVALID)
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return NULL;
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for (usp=validated_users;usp;usp=usp->next,count++) {
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if (vuid == usp->vuid) {
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if (count > 10) {
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DLIST_PROMOTE(validated_users, usp);
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}
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return usp;
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}
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}
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return NULL;
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}
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/****************************************************************************
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invalidate a uid
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****************************************************************************/
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void invalidate_vuid(uint16 vuid)
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{
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user_struct *vuser = get_valid_user_struct(vuid);
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if (vuser == NULL)
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return;
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session_yield(vuid);
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DLIST_REMOVE(validated_users, vuser);
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safe_free(vuser->groups);
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delete_nt_token(&vuser->nt_user_token);
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safe_free(vuser);
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num_validated_vuids--;
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}
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/****************************************************************************
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invalidate all vuid entries for this process
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****************************************************************************/
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void invalidate_all_vuids(void)
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{
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user_struct *usp, *next=NULL;
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for (usp=validated_users;usp;usp=next) {
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next = usp->next;
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invalidate_vuid(usp->vuid);
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}
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}
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/****************************************************************************
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return a validated username
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****************************************************************************/
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char *validated_username(uint16 vuid)
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{
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user_struct *vuser = get_valid_user_struct(vuid);
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if (vuser == NULL)
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return 0;
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return(vuser->user.unix_name);
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}
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/****************************************************************************
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return a validated domain
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****************************************************************************/
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char *validated_domain(uint16 vuid)
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{
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user_struct *vuser = get_valid_user_struct(vuid);
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if (vuser == NULL)
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return 0;
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return(vuser->user.domain);
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}
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/****************************************************************************
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Create the SID list for this user.
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****************************************************************************/
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NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
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{
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extern DOM_SID global_sid_World;
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extern DOM_SID global_sid_Network;
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extern DOM_SID global_sid_Builtin_Guests;
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extern DOM_SID global_sid_Authenticated_Users;
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NT_USER_TOKEN *token;
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DOM_SID *psids;
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int i, psid_ndx = 0;
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size_t num_sids = 0;
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fstring sid_str;
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if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
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return NULL;
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ZERO_STRUCTP(token);
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/* We always have uid/gid plus World and Network and Authenticated Users or Guest SIDs. */
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num_sids = 5 + ngroups;
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if ((token->user_sids = (DOM_SID *)malloc( num_sids*sizeof(DOM_SID))) == NULL) {
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free(token);
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return NULL;
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}
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psids = token->user_sids;
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/*
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* Note - user SID *MUST* be first in token !
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* se_access_check depends on this.
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*/
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uid_to_sid( &psids[psid_ndx++], uid);
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/*
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* Primary group SID is second in token. Convention.
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*/
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gid_to_sid( &psids[psid_ndx++], gid);
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/* Now add the group SIDs. */
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for (i = 0; i < ngroups; i++) {
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if (groups[i] != gid) {
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gid_to_sid( &psids[psid_ndx++], groups[i]);
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}
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}
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/*
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* Finally add the "standard" SIDs.
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* The only difference between guest and "anonymous" (which we
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* don't really support) is the addition of Authenticated_Users.
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*/
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sid_copy( &psids[psid_ndx++], &global_sid_World);
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sid_copy( &psids[psid_ndx++], &global_sid_Network);
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if (is_guest)
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sid_copy( &psids[psid_ndx++], &global_sid_Builtin_Guests);
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else
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sid_copy( &psids[psid_ndx++], &global_sid_Authenticated_Users);
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token->num_sids = psid_ndx;
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/* Dump list of sids in token */
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for (i = 0; i < token->num_sids; i++) {
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DEBUG(5, ("user token sid %s\n",
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sid_to_string(sid_str, &token->user_sids[i])));
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}
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return token;
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}
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/****************************************************************************
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register a uid/name pair as being valid and that a valid password
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has been given. vuid is biased by an offset. This allows us to
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tell random client vuid's (normally zero) from valid vuids.
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****************************************************************************/
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int register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
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char *domain,BOOL guest)
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{
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user_struct *vuser = NULL;
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struct passwd *pwfile; /* for getting real name from passwd file */
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/* Ensure no vuid gets registered in share level security. */
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if(lp_security() == SEC_SHARE)
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return UID_FIELD_INVALID;
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/* Limit allowed vuids to 16bits - VUID_OFFSET. */
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if (num_validated_vuids >= 0xFFFF-VUID_OFFSET)
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return UID_FIELD_INVALID;
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if((vuser = (user_struct *)malloc( sizeof(user_struct) )) == NULL) {
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DEBUG(0,("Failed to malloc users struct!\n"));
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return UID_FIELD_INVALID;
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}
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ZERO_STRUCTP(vuser);
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DEBUG(10,("register_vuid: (%u,%u) %s %s %s guest=%d\n", (unsigned int)uid, (unsigned int)gid,
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unix_name, requested_name, domain, guest ));
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/* Allocate a free vuid. Yes this is a linear search... :-) */
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while( get_valid_user_struct(next_vuid) != NULL ) {
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next_vuid++;
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/* Check for vuid wrap. */
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if (next_vuid == UID_FIELD_INVALID)
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next_vuid = VUID_OFFSET;
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}
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DEBUG(10,("register_vuid: allocated vuid = %u\n", (unsigned int)next_vuid ));
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vuser->vuid = next_vuid;
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vuser->uid = uid;
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vuser->gid = gid;
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vuser->guest = guest;
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fstrcpy(vuser->user.unix_name,unix_name);
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fstrcpy(vuser->user.smb_name,requested_name);
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fstrcpy(vuser->user.domain,domain);
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vuser->n_groups = 0;
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vuser->groups = NULL;
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/* Find all the groups this uid is in and store them.
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Used by become_user() */
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initialise_groups(unix_name, uid, gid);
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get_current_groups( &vuser->n_groups, &vuser->groups);
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/* Create an NT_USER_TOKEN struct for this user. */
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vuser->nt_user_token = create_nt_token(uid,gid, vuser->n_groups, vuser->groups, guest);
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next_vuid++;
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num_validated_vuids++;
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DLIST_ADD(validated_users, vuser);
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DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
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DEBUG(3, ("Clearing default real name\n"));
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if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL) {
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DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos));
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fstrcpy(vuser->user.full_name, pwfile->pw_gecos);
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}
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if (!session_claim(vuser->vuid)) {
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DEBUG(1,("Failed to claim session for vuid=%d\n", vuser->vuid));
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invalidate_vuid(vuser->vuid);
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return -1;
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}
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return vuser->vuid;
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}
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/****************************************************************************
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add a name to the session users list
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****************************************************************************/
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void add_session_user(char *user)
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{
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fstring suser;
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StrnCpy(suser,user,sizeof(suser)-1);
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if (!Get_Pwnam(suser,True)) return;
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if (suser && *suser && !in_list(suser,session_users,False))
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{
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if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
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DEBUG(1,("Too many session users??\n"));
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else
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{
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pstrcat(session_users," ");
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pstrcat(session_users,suser);
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}
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}
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}
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/****************************************************************************
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update the encrypted smbpasswd file from the plaintext username and password
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*****************************************************************************/
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static BOOL update_smbpassword_file(char *user, char *password)
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{
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SAM_ACCOUNT *sampass = NULL;
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BOOL ret;
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pdb_init_sam(&sampass);
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become_root();
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ret = pdb_getsampwnam(sampass, user);
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unbecome_root();
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if(ret == False) {
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DEBUG(0,("pdb_getsampwnam returned NULL\n"));
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pdb_clear_sam(sampass);
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return False;
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}
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/*
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* Remove the account disabled flag - we are updating the
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* users password from a login.
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*/
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pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED);
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/* Here, the flag is one, because we want to ignore the
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XXXXXXX'd out password */
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ret = change_oem_password( sampass, password, True);
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if (ret == False) {
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DEBUG(3,("change_oem_password returned False\n"));
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}
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pdb_clear_sam(sampass);
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return ret;
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}
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/****************************************************************************
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core of smb password checking routine.
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****************************************************************************/
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BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8)
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{
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/* Finish the encryption of part_passwd. */
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unsigned char p21[21];
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unsigned char p24[24];
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if (part_passwd == NULL)
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{
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DEBUG(10,("No password set - allowing access\n"));
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/* No password set - always true ! */
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return 1;
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}
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memset(p21,'\0',21);
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memcpy(p21,part_passwd,16);
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E_P24(p21, c8, p24);
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#if DEBUG_PASSWORD
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{
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int i;
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DEBUG(100,("Part password (P16) was |"));
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for(i = 0; i < 16; i++)
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DEBUG(100,("%X ", (unsigned char)part_passwd[i]));
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DEBUG(100,("|\n"));
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DEBUG(100,("Password from client was |"));
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for(i = 0; i < 24; i++)
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DEBUG(100,("%X ", (unsigned char)password[i]));
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DEBUG(100,("|\n"));
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DEBUG(100,("Given challenge was |"));
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for(i = 0; i < 8; i++)
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DEBUG(100,("%X ", (unsigned char)c8[i]));
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DEBUG(100,("|\n"));
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DEBUG(100,("Value from encryption was |"));
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for(i = 0; i < 24; i++)
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DEBUG(100,("%X ", (unsigned char)p24[i]));
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DEBUG(100,("|\n"));
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}
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#endif
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return (memcmp(p24, password, 24) == 0);
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}
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/****************************************************************************
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Do a specific test for an smb password being correct, given a smb_password and
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the lanman and NT responses.
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****************************************************************************/
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BOOL smb_password_ok(SAM_ACCOUNT *sampass, uchar chal[8],
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uchar lm_pass[24], uchar nt_pass[24])
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{
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uchar challenge[8];
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char* user_name;
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uint8 *nt_pw, *lm_pw;
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if (!lm_pass || !sampass)
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return(False);
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user_name = pdb_get_username(sampass);
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DEBUG(4,("smb_password_ok: Checking SMB password for user %s\n",user_name));
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if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
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DEBUG(1,("smb_password_ok: account for user %s was disabled.\n", user_name));
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return(False);
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}
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if (chal == NULL) {
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DEBUG(5,("smb_password_ok: use last SMBnegprot challenge\n"));
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if (!last_challenge(challenge)) {
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DEBUG(1,("smb_password_ok: no challenge done - password failed\n"));
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return False;
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}
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} else {
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DEBUG(5,("smb_password_ok: challenge received\n"));
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memcpy(challenge, chal, 8);
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}
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nt_pw = pdb_get_nt_passwd(sampass);
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if ((Protocol >= PROTOCOL_NT1) && (nt_pw != NULL)) {
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/* We have the NT MD4 hash challenge available - see if we can
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use it (ie. does it exist in the smbpasswd file).
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*/
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DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
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if (smb_password_check((char *)nt_pass, (uchar *)nt_pw, challenge)) {
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DEBUG(4,("smb_password_ok: NT MD4 password check succeeded\n"));
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return(True);
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}
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DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
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}
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/* Try against the lanman password. pdb_get_lanman_passwd(sampass) == NULL
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means no password, allow access. */
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lm_pw = pdb_get_lanman_passwd(sampass);
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if((lm_pw == NULL) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ))
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{
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DEBUG(4,("smb_password_ok: no password required for user %s\n",user_name));
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return True;
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}
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if(lp_lanman_auth() && (lm_pw != NULL)) {
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DEBUG(4,("smb_password_ok: Checking LM password\n"));
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if(smb_password_check((char *)lm_pass,(uchar *)lm_pw, challenge)) {
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DEBUG(4,("smb_password_ok: LM password check succeeded\n"));
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return(True);
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}
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DEBUG(4,("smb_password_ok: LM password check failed\n"));
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}
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return False;
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}
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/****************************************************************************
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check if a username/password is OK assuming the password is a 24 byte
|
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SMB hash
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return True if the password is correct, False otherwise
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****************************************************************************/
|
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BOOL pass_check_smb(char *user, char *domain, uchar *chal,
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uchar *lm_pwd, uchar *nt_pwd, struct passwd *pwd)
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{
|
|
struct passwd *pass;
|
|
SAM_ACCOUNT *sampass=NULL;
|
|
BOOL ret;
|
|
|
|
if (!lm_pwd || !nt_pwd)
|
|
{
|
|
return(False);
|
|
}
|
|
|
|
/* FIXME! this code looks to be unnecessary now that the passdb
|
|
validates that the username exists and has a valid uid */
|
|
if (pwd != NULL && user == NULL)
|
|
{
|
|
pass = (struct passwd *) pwd;
|
|
user = pass->pw_name;
|
|
}
|
|
else
|
|
{
|
|
/* I don't get this call here. I think it should be moved.
|
|
Need to check on it. --jerry */
|
|
pass = smb_getpwnam(user,True);
|
|
}
|
|
|
|
if (pass == NULL)
|
|
{
|
|
DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user));
|
|
return(False);
|
|
}
|
|
|
|
pdb_init_sam(&sampass);
|
|
|
|
/* get the account information */
|
|
ret = pdb_getsampwnam(sampass, user);
|
|
if (ret == False)
|
|
{
|
|
DEBUG(1,("Couldn't find user '%s' in passdb file.\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return(False);
|
|
}
|
|
|
|
/* Quit if the account was disabled. */
|
|
if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
|
|
DEBUG(1,("Account for user '%s' was disabled.\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return(False);
|
|
}
|
|
|
|
/* Ensure the uid's match
|
|
FIXME! This also seems unnecessary --jerry */
|
|
#if 0 /* GWC */
|
|
if (smb_pass->smb_userid != pass->pw_uid)
|
|
{
|
|
DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return(False);
|
|
}
|
|
#endif
|
|
|
|
if (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)
|
|
{
|
|
if (lp_null_passwords())
|
|
{
|
|
DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return(True);
|
|
}
|
|
else
|
|
{
|
|
DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return(False);
|
|
}
|
|
}
|
|
|
|
if (smb_password_ok(sampass, chal, lm_pwd, nt_pwd))
|
|
{
|
|
pdb_clear_sam(sampass);
|
|
return(True);
|
|
}
|
|
|
|
DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user));
|
|
pdb_clear_sam(sampass);
|
|
return False;
|
|
}
|
|
|
|
/****************************************************************************
|
|
check if a username/password pair is OK either via the system password
|
|
database or the encrypted SMB password database
|
|
return True if the password is correct, False otherwise
|
|
****************************************************************************/
|
|
BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
|
|
{
|
|
BOOL ret;
|
|
|
|
if ((pwlen == 0) && !lp_null_passwords()) {
|
|
DEBUG(4,("Null passwords not allowed.\n"));
|
|
return False;
|
|
}
|
|
|
|
if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords())) {
|
|
/* if 24 bytes long assume it is an encrypted password */
|
|
uchar challenge[8];
|
|
|
|
if (!last_challenge(challenge)) {
|
|
DEBUG(0,("Error: challenge not done for user=%s\n", user));
|
|
return False;
|
|
}
|
|
|
|
ret = pass_check_smb(user, global_myworkgroup,
|
|
challenge, (uchar *)password, (uchar *)password, pwd);
|
|
|
|
/*
|
|
* Try with PAM (may not be compiled in - returns True if not. JRA).
|
|
* FIXME ! Should this be called if we're using winbindd ? What about
|
|
* non-local accounts ? JRA.
|
|
*/
|
|
|
|
if (ret)
|
|
return (smb_pam_accountcheck(user) == NT_STATUS_NOPROBLEMO);
|
|
}
|
|
|
|
return pass_check(user, password, pwlen, pwd,
|
|
lp_update_encrypted() ?
|
|
update_smbpassword_file : NULL);
|
|
}
|
|
|
|
/****************************************************************************
|
|
check if a username is valid
|
|
****************************************************************************/
|
|
BOOL user_ok(char *user,int snum)
|
|
{
|
|
pstring valid, invalid;
|
|
BOOL ret;
|
|
|
|
StrnCpy(valid, lp_valid_users(snum), sizeof(pstring)-1);
|
|
StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1);
|
|
|
|
pstring_sub(valid,"%S",lp_servicename(snum));
|
|
pstring_sub(invalid,"%S",lp_servicename(snum));
|
|
|
|
ret = !user_in_list(user,invalid);
|
|
|
|
if (ret && valid && *valid) {
|
|
ret = user_in_list(user,valid);
|
|
}
|
|
|
|
if (ret && lp_onlyuser(snum)) {
|
|
char *user_list = lp_username(snum);
|
|
pstring_sub(user_list,"%S",lp_servicename(snum));
|
|
ret = user_in_list(user,user_list);
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
validate a group username entry. Return the username or NULL
|
|
****************************************************************************/
|
|
static char *validate_group(char *group,char *password,int pwlen,int snum)
|
|
{
|
|
#ifdef HAVE_NETGROUP
|
|
{
|
|
char *host, *user, *domain;
|
|
setnetgrent(group);
|
|
while (getnetgrent(&host, &user, &domain)) {
|
|
if (user) {
|
|
if (user_ok(user, snum) &&
|
|
password_ok(user,password,pwlen,NULL)) {
|
|
endnetgrent();
|
|
return(user);
|
|
}
|
|
}
|
|
}
|
|
endnetgrent();
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_GETGRENT
|
|
{
|
|
struct group *gptr;
|
|
setgrent();
|
|
while ((gptr = (struct group *)getgrent())) {
|
|
if (strequal(gptr->gr_name,group))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* As user_ok can recurse doing a getgrent(), we must
|
|
* copy the member list into a pstring on the stack before
|
|
* use. Bug pointed out by leon@eatworms.swmed.edu.
|
|
*/
|
|
|
|
if (gptr) {
|
|
pstring member_list;
|
|
char *member;
|
|
size_t copied_len = 0;
|
|
int i;
|
|
|
|
*member_list = '\0';
|
|
member = member_list;
|
|
|
|
for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
|
|
size_t member_len = strlen(gptr->gr_mem[i]) + 1;
|
|
if( copied_len + member_len < sizeof(pstring)) {
|
|
|
|
DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i]));
|
|
|
|
safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1);
|
|
copied_len += member_len;
|
|
member += copied_len;
|
|
} else {
|
|
*member = '\0';
|
|
}
|
|
}
|
|
|
|
endgrent();
|
|
|
|
member = member_list;
|
|
while (*member) {
|
|
static fstring name;
|
|
fstrcpy(name,member);
|
|
if (user_ok(name,snum) &&
|
|
password_ok(name,password,pwlen,NULL)) {
|
|
endgrent();
|
|
return(&name[0]);
|
|
}
|
|
|
|
DEBUG(10,("validate_group = member = %s\n", member));
|
|
|
|
member += strlen(member) + 1;
|
|
}
|
|
} else {
|
|
endgrent();
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif
|
|
return(NULL);
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
check for authority to login to a service with a given username/password
|
|
****************************************************************************/
|
|
BOOL authorise_login(int snum,char *user,char *password, int pwlen,
|
|
BOOL *guest,BOOL *force,uint16 vuid)
|
|
{
|
|
BOOL ok = False;
|
|
user_struct *vuser = get_valid_user_struct(vuid);
|
|
|
|
if (lp_security() > SEC_SHARE && !vuser) {
|
|
DEBUG(1,("authorise_login: refusing user %s with no session setup\n",
|
|
user));
|
|
return False;
|
|
}
|
|
|
|
*guest = False;
|
|
|
|
#if DEBUG_PASSWORD
|
|
DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
|
|
#endif
|
|
|
|
/* there are several possibilities:
|
|
1) login as the given user with given password
|
|
2) login as a previously registered username with the given password
|
|
3) login as a session list username with the given password
|
|
4) login as a previously validated user/password pair
|
|
5) login as the "user =" user with given password
|
|
6) login as the "user =" user with no password (guest connection)
|
|
7) login as guest user with no password
|
|
|
|
if the service is guest_only then steps 1 to 5 are skipped
|
|
*/
|
|
|
|
if (GUEST_ONLY(snum)) *force = True;
|
|
|
|
if (!(GUEST_ONLY(snum) && GUEST_OK(snum)))
|
|
{
|
|
/* check the given username and password */
|
|
if (!ok && (*user) && user_ok(user,snum)) {
|
|
ok = password_ok(user,password, pwlen, NULL);
|
|
if (ok) DEBUG(3,("ACCEPTED: given username password ok\n"));
|
|
}
|
|
|
|
/* check for a previously registered guest username */
|
|
if (!ok && (vuser != 0) && vuser->guest) {
|
|
if (user_ok(vuser->user.unix_name,snum) &&
|
|
password_ok(vuser->user.unix_name, password, pwlen, NULL)) {
|
|
fstrcpy(user, vuser->user.unix_name);
|
|
vuser->guest = False;
|
|
DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
|
|
ok = True;
|
|
}
|
|
}
|
|
|
|
|
|
/* now check the list of session users */
|
|
if (!ok)
|
|
{
|
|
char *auser;
|
|
char *user_list = strdup(session_users);
|
|
if (!user_list) return(False);
|
|
|
|
for (auser=strtok(user_list,LIST_SEP);
|
|
!ok && auser;
|
|
auser = strtok(NULL,LIST_SEP))
|
|
{
|
|
fstring user2;
|
|
fstrcpy(user2,auser);
|
|
if (!user_ok(user2,snum)) continue;
|
|
|
|
if (password_ok(user2,password, pwlen, NULL)) {
|
|
ok = True;
|
|
fstrcpy(user,user2);
|
|
DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
|
|
}
|
|
}
|
|
free(user_list);
|
|
}
|
|
|
|
/* check for a previously validated username/password pair */
|
|
if (!ok && (lp_security() > SEC_SHARE) &&
|
|
(vuser != 0) && !vuser->guest &&
|
|
user_ok(vuser->user.unix_name,snum)) {
|
|
fstrcpy(user,vuser->user.unix_name);
|
|
*guest = False;
|
|
DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
|
|
ok = True;
|
|
}
|
|
|
|
/* check for a rhosts entry */
|
|
if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
|
|
ok = True;
|
|
DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n"));
|
|
}
|
|
|
|
/* check the user= fields and the given password */
|
|
if (!ok && lp_username(snum)) {
|
|
char *auser;
|
|
pstring user_list;
|
|
StrnCpy(user_list,lp_username(snum),sizeof(pstring));
|
|
|
|
pstring_sub(user_list,"%S",lp_servicename(snum));
|
|
|
|
for (auser=strtok(user_list,LIST_SEP);
|
|
auser && !ok;
|
|
auser = strtok(NULL,LIST_SEP))
|
|
{
|
|
if (*auser == '@')
|
|
{
|
|
auser = validate_group(auser+1,password,pwlen,snum);
|
|
if (auser)
|
|
{
|
|
ok = True;
|
|
fstrcpy(user,auser);
|
|
DEBUG(3,("ACCEPTED: group username and given password ok\n"));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fstring user2;
|
|
fstrcpy(user2,auser);
|
|
if (user_ok(user2,snum) &&
|
|
password_ok(user2,password,pwlen,NULL))
|
|
{
|
|
ok = True;
|
|
fstrcpy(user,user2);
|
|
DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} /* not guest only */
|
|
|
|
/* check for a normal guest connection */
|
|
if (!ok && GUEST_OK(snum))
|
|
{
|
|
fstring guestname;
|
|
StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
|
|
if (Get_Pwnam(guestname,True))
|
|
{
|
|
fstrcpy(user,guestname);
|
|
ok = True;
|
|
DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
|
|
}
|
|
else
|
|
DEBUG(0,("Invalid guest account %s??\n",guestname));
|
|
*guest = True;
|
|
}
|
|
|
|
if (ok && !user_ok(user,snum))
|
|
{
|
|
DEBUG(0,("rejected invalid user %s\n",user));
|
|
ok = False;
|
|
}
|
|
|
|
return(ok);
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
read the a hosts.equiv or .rhosts file and check if it
|
|
allows this user from this machine
|
|
****************************************************************************/
|
|
static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
|
|
{
|
|
int plus_allowed = 1;
|
|
char *file_host;
|
|
char *file_user;
|
|
char **lines = file_lines_load(equiv_file, NULL, False);
|
|
int i;
|
|
|
|
DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
|
|
if (! lines) return False;
|
|
for (i=0; lines[i]; i++) {
|
|
char *buf = lines[i];
|
|
trim_string(buf," "," ");
|
|
|
|
if (buf[0] != '#' && buf[0] != '\n')
|
|
{
|
|
BOOL is_group = False;
|
|
int plus = 1;
|
|
char *bp = buf;
|
|
if (strcmp(buf, "NO_PLUS\n") == 0)
|
|
{
|
|
DEBUG(6, ("check_user_equiv NO_PLUS\n"));
|
|
plus_allowed = 0;
|
|
}
|
|
else {
|
|
if (buf[0] == '+')
|
|
{
|
|
bp++;
|
|
if (*bp == '\n' && plus_allowed)
|
|
{
|
|
/* a bare plus means everbody allowed */
|
|
DEBUG(6, ("check_user_equiv everybody allowed\n"));
|
|
file_lines_free(lines);
|
|
return True;
|
|
}
|
|
}
|
|
else if (buf[0] == '-')
|
|
{
|
|
bp++;
|
|
plus = 0;
|
|
}
|
|
if (*bp == '@')
|
|
{
|
|
is_group = True;
|
|
bp++;
|
|
}
|
|
file_host = strtok(bp, " \t\n");
|
|
file_user = strtok(NULL, " \t\n");
|
|
DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
|
|
file_user ? file_user : "(null)" ));
|
|
if (file_host && *file_host)
|
|
{
|
|
BOOL host_ok = False;
|
|
|
|
#if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
|
|
if (is_group)
|
|
{
|
|
static char *mydomain = NULL;
|
|
if (!mydomain)
|
|
yp_get_default_domain(&mydomain);
|
|
if (mydomain && innetgr(file_host,remote,user,mydomain))
|
|
host_ok = True;
|
|
}
|
|
#else
|
|
if (is_group)
|
|
{
|
|
DEBUG(1,("Netgroups not configured\n"));
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
/* is it this host */
|
|
/* the fact that remote has come from a call of gethostbyaddr
|
|
* means that it may have the fully qualified domain name
|
|
* so we could look up the file version to get it into
|
|
* a canonical form, but I would rather just type it
|
|
* in full in the equiv file
|
|
*/
|
|
if (!host_ok && !is_group && strequal(remote, file_host))
|
|
host_ok = True;
|
|
|
|
if (!host_ok)
|
|
continue;
|
|
|
|
/* is it this user */
|
|
if (file_user == 0 || strequal(user, file_user))
|
|
{
|
|
DEBUG(5, ("check_user_equiv matched %s%s %s\n",
|
|
(plus ? "+" : "-"), file_host,
|
|
(file_user ? file_user : "")));
|
|
file_lines_free(lines);
|
|
return (plus ? True : False);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
file_lines_free(lines);
|
|
return False;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
check for a possible hosts equiv or rhosts entry for the user
|
|
****************************************************************************/
|
|
BOOL check_hosts_equiv(char *user)
|
|
{
|
|
char *fname = NULL;
|
|
pstring rhostsfile;
|
|
struct passwd *pass = Get_Pwnam(user,True);
|
|
|
|
if (!pass)
|
|
return(False);
|
|
|
|
fname = lp_hosts_equiv();
|
|
|
|
/* note: don't allow hosts.equiv on root */
|
|
if (fname && *fname && (pass->pw_uid != 0)) {
|
|
if (check_user_equiv(user,client_name(),fname))
|
|
return(True);
|
|
}
|
|
|
|
if (lp_use_rhosts())
|
|
{
|
|
char *home = get_user_home_dir(user);
|
|
if (home) {
|
|
slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
|
|
if (check_user_equiv(user,client_name(),rhostsfile))
|
|
return(True);
|
|
}
|
|
}
|
|
|
|
return(False);
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Return the client state structure.
|
|
****************************************************************************/
|
|
|
|
struct cli_state *server_client(void)
|
|
{
|
|
static struct cli_state pw_cli;
|
|
return &pw_cli;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Support for server level security.
|
|
****************************************************************************/
|
|
|
|
struct cli_state *server_cryptkey(void)
|
|
{
|
|
struct cli_state *cli;
|
|
fstring desthost;
|
|
struct in_addr dest_ip;
|
|
char *p, *pserver;
|
|
BOOL connected_ok = False;
|
|
|
|
cli = server_client();
|
|
|
|
if (!cli_initialise(cli))
|
|
return NULL;
|
|
|
|
pserver = strdup(lp_passwordserver());
|
|
p = pserver;
|
|
|
|
while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
|
|
standard_sub_basic(desthost);
|
|
strupper(desthost);
|
|
|
|
if(!resolve_name( desthost, &dest_ip, 0x20)) {
|
|
DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
|
|
continue;
|
|
}
|
|
|
|
if (ismyip(dest_ip)) {
|
|
DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
|
|
continue;
|
|
}
|
|
|
|
if (cli_connect(cli, desthost, &dest_ip)) {
|
|
DEBUG(3,("connected to password server %s\n",desthost));
|
|
connected_ok = True;
|
|
break;
|
|
}
|
|
}
|
|
|
|
free(pserver);
|
|
|
|
if (!connected_ok) {
|
|
DEBUG(0,("password server not available\n"));
|
|
cli_shutdown(cli);
|
|
return NULL;
|
|
}
|
|
|
|
if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
|
|
return NULL;
|
|
|
|
DEBUG(3,("got session\n"));
|
|
|
|
if (!cli_negprot(cli)) {
|
|
DEBUG(1,("%s rejected the negprot\n",desthost));
|
|
cli_shutdown(cli);
|
|
return NULL;
|
|
}
|
|
|
|
if (cli->protocol < PROTOCOL_LANMAN2 ||
|
|
!(cli->sec_mode & 1)) {
|
|
DEBUG(1,("%s isn't in user level security mode\n",desthost));
|
|
cli_shutdown(cli);
|
|
return NULL;
|
|
}
|
|
|
|
DEBUG(3,("password server OK\n"));
|
|
|
|
return cli;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Validate a password with the password server.
|
|
****************************************************************************/
|
|
|
|
BOOL server_validate(char *user, char *domain,
|
|
char *pass, int passlen,
|
|
char *ntpass, int ntpasslen)
|
|
{
|
|
struct cli_state *cli;
|
|
static unsigned char badpass[24];
|
|
static BOOL tested_password_server = False;
|
|
static BOOL bad_password_server = False;
|
|
|
|
cli = server_client();
|
|
|
|
if (!cli->initialised) {
|
|
DEBUG(1,("password server %s is not connected\n", cli->desthost));
|
|
return(False);
|
|
}
|
|
|
|
if(badpass[0] == 0)
|
|
memset(badpass, 0x1f, sizeof(badpass));
|
|
|
|
if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
|
|
/*
|
|
* Very unlikely, our random bad password is the same as the users
|
|
* password. */
|
|
memset(badpass, badpass[0]+1, sizeof(badpass));
|
|
}
|
|
|
|
/*
|
|
* Attempt a session setup with a totally incorrect password.
|
|
* If this succeeds with the guest bit *NOT* set then the password
|
|
* server is broken and is not correctly setting the guest bit. We
|
|
* need to detect this as some versions of NT4.x are broken. JRA.
|
|
*/
|
|
|
|
if(!tested_password_server) {
|
|
if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
|
|
(char *)badpass, sizeof(badpass), domain)) {
|
|
|
|
/*
|
|
* We connected to the password server so we
|
|
* can say we've tested it.
|
|
*/
|
|
tested_password_server = True;
|
|
|
|
if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
|
|
DEBUG(0,("server_validate: password server %s allows users as non-guest \
|
|
with a bad password.\n", cli->desthost));
|
|
DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
|
|
use this machine as the password server.\n"));
|
|
cli_ulogoff(cli);
|
|
|
|
/*
|
|
* Password server has the bug.
|
|
*/
|
|
bad_password_server = True;
|
|
return False;
|
|
}
|
|
cli_ulogoff(cli);
|
|
}
|
|
} else {
|
|
|
|
/*
|
|
* We have already tested the password server.
|
|
* Fail immediately if it has the bug.
|
|
*/
|
|
|
|
if(bad_password_server) {
|
|
DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
|
|
with a bad password.\n", cli->desthost));
|
|
DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
|
|
use this machine as the password server.\n"));
|
|
return False;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we know the password server will correctly set the guest bit, or is
|
|
* not guest enabled, we can try with the real password.
|
|
*/
|
|
|
|
if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
|
|
DEBUG(1,("password server %s rejected the password\n", cli->desthost));
|
|
return False;
|
|
}
|
|
|
|
/* if logged in as guest then reject */
|
|
if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
|
|
DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
|
|
cli_ulogoff(cli);
|
|
return(False);
|
|
}
|
|
|
|
cli_ulogoff(cli);
|
|
|
|
return(True);
|
|
}
|
|
|
|
/***********************************************************************
|
|
Connect to a remote machine for domain security authentication
|
|
given a name or IP address.
|
|
************************************************************************/
|
|
|
|
static BOOL connect_to_domain_password_server(struct cli_state *pcli,
|
|
char *server,
|
|
unsigned char *trust_passwd)
|
|
{
|
|
struct in_addr dest_ip;
|
|
fstring remote_machine;
|
|
|
|
if(cli_initialise(pcli) == False) {
|
|
DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
|
|
return False;
|
|
}
|
|
|
|
if (is_ipaddress(server)) {
|
|
struct in_addr to_ip;
|
|
|
|
/* we shouldn't have 255.255.255.255 forthe IP address of
|
|
a password server anyways */
|
|
if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
|
|
DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
|
|
return False;
|
|
}
|
|
|
|
if (!name_status_find(0x20, to_ip, remote_machine)) {
|
|
DEBUG(0, ("connect_to_domain_password_server: Can't "
|
|
"resolve name for IP %s\n", server));
|
|
return False;
|
|
}
|
|
} else {
|
|
fstrcpy(remote_machine, server);
|
|
}
|
|
|
|
standard_sub_basic(remote_machine);
|
|
strupper(remote_machine);
|
|
|
|
if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
|
|
DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (ismyip(dest_ip)) {
|
|
DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
|
|
remote_machine));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (!cli_connect(pcli, remote_machine, &dest_ip)) {
|
|
DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
|
|
machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
|
|
DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
|
|
session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
|
|
return False;
|
|
}
|
|
|
|
pcli->protocol = PROTOCOL_NT1;
|
|
|
|
if (!cli_negprot(pcli)) {
|
|
DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (pcli->protocol != PROTOCOL_NT1) {
|
|
DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
|
|
remote_machine));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Do an anonymous session setup.
|
|
*/
|
|
|
|
if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
|
|
DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (!(pcli->sec_mode & 1)) {
|
|
DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
|
|
remote_machine));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
|
|
DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* We now have an anonymous connection to IPC$ on the domain password server.
|
|
*/
|
|
|
|
/*
|
|
* Even if the connect succeeds we need to setup the netlogon
|
|
* pipe here. We do this as we may just have changed the domain
|
|
* account password on the PDC and yet we may be talking to
|
|
* a BDC that doesn't have this replicated yet. In this case
|
|
* a successful connect to a DC needs to take the netlogon connect
|
|
* into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
|
|
*/
|
|
|
|
if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
|
|
DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
|
|
machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
|
|
cli_nt_session_close(pcli);
|
|
cli_ulogoff(pcli);
|
|
cli_shutdown(pcli);
|
|
return False;
|
|
}
|
|
|
|
if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
|
|
DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
|
|
%s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
|
|
cli_nt_session_close(pcli);
|
|
cli_ulogoff(pcli);
|
|
cli_shutdown(pcli);
|
|
return(False);
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
/***********************************************************************
|
|
Utility function to attempt a connection to an IP address of a DC.
|
|
************************************************************************/
|
|
|
|
static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd)
|
|
{
|
|
fstring dc_name;
|
|
|
|
/*
|
|
* Ignore addresses we have already tried.
|
|
*/
|
|
|
|
if (ip_equal(ipzero, *ip))
|
|
return False;
|
|
|
|
if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
|
|
return False;
|
|
|
|
return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
We have been asked to dynamcially determine the IP addresses of
|
|
the PDC and BDC's for this DOMAIN, and query them in turn.
|
|
************************************************************************/
|
|
static BOOL find_connect_pdc(struct cli_state *pcli, unsigned char *trust_passwd, time_t last_change_time)
|
|
{
|
|
struct in_addr *ip_list = NULL;
|
|
int count = 0;
|
|
int i;
|
|
BOOL connected_ok = False;
|
|
time_t time_now = time(NULL);
|
|
BOOL use_pdc_only = False;
|
|
|
|
/*
|
|
* If the time the machine password has changed
|
|
* was less than an hour ago then we need to contact
|
|
* the PDC only, as we cannot be sure domain replication
|
|
* has yet taken place. Bug found by Gerald (way to go
|
|
* Gerald !). JRA.
|
|
*/
|
|
|
|
if (time_now - last_change_time < 3600)
|
|
use_pdc_only = True;
|
|
|
|
if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count))
|
|
return False;
|
|
|
|
/*
|
|
* Firstly try and contact a PDC/BDC who has the same
|
|
* network address as any of our interfaces.
|
|
*/
|
|
for(i = 0; i < count; i++) {
|
|
if(!is_local_net(ip_list[i]))
|
|
continue;
|
|
|
|
if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
|
|
break;
|
|
|
|
ip_list[i] = ipzero; /* Tried and failed. */
|
|
}
|
|
|
|
/*
|
|
* Secondly try and contact a random PDC/BDC.
|
|
*/
|
|
if(!connected_ok) {
|
|
i = (sys_random() % count);
|
|
|
|
if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
|
|
ip_list[i] = ipzero; /* Tried and failed. */
|
|
}
|
|
|
|
/*
|
|
* Finally go through the IP list in turn, ignoring any addresses
|
|
* we have already tried.
|
|
*/
|
|
if(!connected_ok) {
|
|
/*
|
|
* Try and connect to any of the other IP addresses in the PDC/BDC list.
|
|
* Note that from a WINS server the #1 IP address is the PDC.
|
|
*/
|
|
for(i = 0; i < count; i++) {
|
|
if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(ip_list != NULL)
|
|
free((char *)ip_list);
|
|
|
|
|
|
return connected_ok;
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
Do the same as security=server, but using NT Domain calls and a session
|
|
key from the machine password.
|
|
************************************************************************/
|
|
|
|
BOOL domain_client_validate( char *user, char *domain,
|
|
char *smb_apasswd, int smb_apasslen,
|
|
char *smb_ntpasswd, int smb_ntpasslen,
|
|
BOOL *user_exists)
|
|
{
|
|
unsigned char local_challenge[8];
|
|
unsigned char local_lm_response[24];
|
|
unsigned char local_nt_response[24];
|
|
unsigned char trust_passwd[16];
|
|
fstring remote_machine;
|
|
char *p, *pserver;
|
|
NET_ID_INFO_CTR ctr;
|
|
NET_USER_INFO_3 info3;
|
|
struct cli_state cli;
|
|
uint32 smb_uid_low;
|
|
BOOL connected_ok = False;
|
|
time_t last_change_time;
|
|
|
|
if(user_exists != NULL)
|
|
*user_exists = True; /* Only set false on a very specific error. */
|
|
|
|
/*
|
|
* Check that the requested domain is not our own machine name.
|
|
* If it is, we should never check the PDC here, we use our own local
|
|
* password file.
|
|
*/
|
|
|
|
if(strequal( domain, global_myname)) {
|
|
DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Next, check that the passwords given were encrypted.
|
|
*/
|
|
|
|
if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
|
|
((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
|
|
|
|
/*
|
|
* Not encrypted - do so.
|
|
*/
|
|
|
|
DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
|
|
generate_random_buffer( local_challenge, 8, False);
|
|
SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
|
|
SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_response);
|
|
smb_apasslen = 24;
|
|
smb_ntpasslen = 24;
|
|
smb_apasswd = (char *)local_lm_response;
|
|
smb_ntpasswd = (char *)local_nt_response;
|
|
} else {
|
|
|
|
/*
|
|
* Encrypted - get the challenge we sent for these
|
|
* responses.
|
|
*/
|
|
|
|
if (!last_challenge(local_challenge)) {
|
|
DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
|
|
return False;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the machine account password for our primary domain
|
|
*/
|
|
if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
|
|
{
|
|
DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* At this point, smb_apasswd points to the lanman response to
|
|
* the challenge in local_challenge, and smb_ntpasswd points to
|
|
* the NT response to the challenge in local_challenge. Ship
|
|
* these over the secure channel to a domain controller and
|
|
* see if they were valid.
|
|
*/
|
|
|
|
ZERO_STRUCT(cli);
|
|
|
|
/*
|
|
* Treat each name in the 'password server =' line as a potential
|
|
* PDC/BDC. Contact each in turn and try and authenticate.
|
|
*/
|
|
|
|
pserver = lp_passwordserver();
|
|
if (! *pserver) pserver = "*";
|
|
p = pserver;
|
|
|
|
while (!connected_ok &&
|
|
next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
|
|
if(strequal(remote_machine, "*")) {
|
|
connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
|
|
} else {
|
|
connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
|
|
}
|
|
}
|
|
|
|
if (!connected_ok) {
|
|
DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
|
|
cli_shutdown(&cli);
|
|
return False;
|
|
}
|
|
|
|
/* We really don't care what LUID we give the user. */
|
|
generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
|
|
|
|
ZERO_STRUCT(info3);
|
|
|
|
if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
|
|
((smb_apasslen != 0) ? smb_apasswd : NULL),
|
|
((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
|
|
&ctr, &info3) == False) {
|
|
uint32 nt_rpc_err;
|
|
|
|
cli_error(&cli, NULL, NULL, &nt_rpc_err);
|
|
DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
|
|
%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
cli_shutdown(&cli);
|
|
|
|
if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL))
|
|
*user_exists = False;
|
|
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Here, if we really want it, we have lots of info about the user in info3.
|
|
*/
|
|
|
|
#if 0
|
|
/*
|
|
* We don't actually need to do this - plus it fails currently with
|
|
* NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
|
|
* send here. JRA.
|
|
*/
|
|
|
|
if(cli_nt_logoff(&cli, &ctr) == False) {
|
|
DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
|
|
%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
cli_shutdown(&cli);
|
|
return False;
|
|
}
|
|
#endif /* 0 */
|
|
|
|
/* Note - once the cli stream is shutdown the mem_ctx used
|
|
to allocate the other_sids and gids structures has been deleted - so
|
|
these pointers are no longer valid..... */
|
|
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
cli_shutdown(&cli);
|
|
return True;
|
|
}
|