mirror of
https://github.com/samba-team/samba.git
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e9ea36e4d2
prompted by the interpret_security() dead code that Jean-Francois
pointed out I added a make target "finddead" that finds potentially
dead (ie. unused) code. It spat out 304 function names ...
I went through these are deleted many of them, making others static
(finddead also reports functions that are used only in the local
file).
in doing this I have almost certainly deleted some useful code. I may
have even prevented compilation with some compile options. I
apologise. I decided it was better to get rid of this code now and add
back the one or two functions that are needed than to keep all this
baggage.
So, if I have done a bit too much "destroying" then let me know. Keep
the swearing to a minimum :)
One bit I didn't do is the ubibt code. Chris, can you look at that?
Heaps of unused functions there. Can they be made static?
(This used to be commit 2204475c87
)
1363 lines
38 KiB
C
1363 lines
38 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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BOOL global_machine_pasword_needs_changing;
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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++) + getpid() + tval.tv_sec;
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v2 = (counter++) * 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(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 = NULL;
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static int num_validated_users = 0;
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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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if (vuid == UID_FIELD_INVALID)
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return NULL;
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vuid -= VUID_OFFSET;
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if ((vuid >= (uint16)num_validated_users) ||
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(validated_users[vuid].uid == -1) || (validated_users[vuid].gid == -1))
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return NULL;
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return &validated_users[vuid];
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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) return;
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vuser->uid = -1;
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vuser->gid = -1;
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vuser->n_sids = 0;
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/* same number of igroups as groups */
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vuser->n_groups = 0;
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if (vuser->groups) free(vuser->groups);
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if (vuser->sids) free(vuser->sids);
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vuser->sids = NULL;
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vuser->groups = NULL;
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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->name);
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}
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/****************************************************************************
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Setup the groups a user belongs to.
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****************************************************************************/
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int setup_groups(char *user, int uid, int gid, int *p_ngroups, GID_T **p_groups)
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{
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int i,ngroups;
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GID_T *groups;
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GID_T grp = 0;
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if (-1 == initgroups(user,gid)) {
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if (getuid() == 0) {
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DEBUG(0,("Unable to initgroups!\n"));
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if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000) {
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DEBUG(0,("This is probably a problem with the account %s\n",
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user));
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}
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}
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return -1;
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}
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ngroups = getgroups(0,&grp);
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if (ngroups <= 0) ngroups = 32;
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groups = (GID_T *)malloc(sizeof(groups[0])*ngroups);
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ngroups = getgroups(ngroups,(gid_t *)groups);
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(*p_ngroups) = ngroups;
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(*p_groups) = groups;
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DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
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for (i = 0; i < ngroups; i++ ) {
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DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
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}
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DEBUG( 3, ( "\n" ) );
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return 0;
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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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uint16 register_vuid(int uid,int gid, char *unix_name, char *requested_name, BOOL guest)
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{
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user_struct *vuser;
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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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#if 0
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/*
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* After observing MS-Exchange services writing to a Samba share
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* I belive this code is incorrect. Each service does its own
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* sessionsetup_and_X for the same user, and as each service shuts
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* down, it does a user_logoff_and_X. As we are consolidating multiple
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* sessionsetup_and_X's onto the same vuid here, when the first service
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* shuts down, it invalidates all the open files for the other services.
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* Hence I am removing this code and forcing each sessionsetup_and_X
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* to get a new vuid.
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* Jeremy Allison. (jallison@whistle.com).
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*/
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int i;
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for(i = 0; i < num_validated_users; i++) {
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vuser = &validated_users[i];
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if ( vuser->uid == uid )
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return (uint16)(i + VUID_OFFSET); /* User already validated */
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}
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#endif
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validated_users = (user_struct *)Realloc(validated_users,
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sizeof(user_struct)*
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(num_validated_users+1));
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if (!validated_users)
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{
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DEBUG(0,("Failed to realloc users struct!\n"));
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num_validated_users = 0;
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return UID_FIELD_INVALID;
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}
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vuser = &validated_users[num_validated_users];
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num_validated_users++;
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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->name,unix_name);
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fstrcpy(vuser->requested_name,requested_name);
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vuser->n_sids = 0;
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vuser->sids = NULL;
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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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setup_groups(unix_name,uid,gid,
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&vuser->n_groups,
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&vuser->groups);
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DEBUG(3,("uid %d registered to name %s\n",uid,unix_name));
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DEBUG(3, ("Clearing default real name\n"));
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fstrcpy(vuser->real_name, "<Full Name>\0");
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if (lp_unix_realname()) {
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if ((pwfile=getpwnam(vuser->name))!= NULL)
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{
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DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
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fstrcpy(vuser->real_name, pwfile->pw_gecos);
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}
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}
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return (uint16)((num_validated_users - 1) + VUID_OFFSET);
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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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struct smb_passwd *smbpw;
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BOOL ret;
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become_root(0);
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smbpw = getsmbpwnam(user);
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unbecome_root(0);
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if(smbpw == NULL) {
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DEBUG(0,("getsmbpwnam returned NULL\n"));
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return False;
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}
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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( smbpw, 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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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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DEBUG(10,("No password set - allowing access\n"));
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/* No password set - always true ! */
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if (part_passwd == NULL)
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return 1;
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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(struct smb_passwd *smb_pass,
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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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if (!lm_pass || !smb_pass) return(False);
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if(smb_pass->acct_ctrl & ACB_DISABLED) {
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DEBUG(3,("account for user %s was disabled.\n",
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smb_pass->smb_name));
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return(False);
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}
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if (!last_challenge(challenge)) {
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DEBUG(1,("no challenge done - password failed\n"));
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return False;
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}
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DEBUG(4,("Checking SMB password for user %s\n",
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smb_pass->smb_name));
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if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != 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,
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(uchar *)smb_pass->smb_nt_passwd,
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challenge)) {
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DEBUG(4,("NT MD4 password check succeeded\n"));
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return(True);
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}
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DEBUG(4,("NT MD4 password check failed\n"));
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}
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/* Try against the lanman password. smb_pass->smb_passwd == NULL means
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no password, allow access. */
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DEBUG(4,("Checking LM MD4 password\n"));
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if((smb_pass->smb_passwd == NULL) &&
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(smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
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DEBUG(4,("no password required for user %s\n",
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smb_pass->smb_name));
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return True;
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}
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if((smb_pass->smb_passwd != NULL) &&
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smb_password_check((char *)lm_pass,
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(uchar *)smb_pass->smb_passwd, challenge)) {
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DEBUG(4,("LM MD4 password check succeeded\n"));
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return(True);
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}
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DEBUG(4,("LM MD4 password check failed\n"));
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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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static BOOL pass_check_smb(char *user,char *password, struct passwd *pwd)
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{
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struct passwd *pass;
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uchar challenge[8];
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struct smb_passwd *smb_pass;
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BOOL challenge_done;
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if (!password) {
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return(False);
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}
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challenge_done = last_challenge(challenge);
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if (!challenge_done) {
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DEBUG(0,("Error: challenge not done for user=%s\n", user));
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return False;
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}
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if (pwd && !user) {
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pass = (struct passwd *) pwd;
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user = pass->pw_name;
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} else {
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pass = Get_Pwnam(user,True);
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}
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if (!pass) {
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DEBUG(3,("Couldn't find user %s\n",user));
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return(False);
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}
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smb_pass = getsmbpwnam(user);
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if (!smb_pass) {
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DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
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return(False);
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}
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|
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/* Quit if the account was disabled. */
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if(smb_pass->acct_ctrl & ACB_DISABLED) {
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DEBUG(3,("account for user %s was disabled.\n", user));
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return(False);
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}
|
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|
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/* Ensure the uid's match */
|
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if (smb_pass->smb_userid != pass->pw_uid) {
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DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
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return(False);
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}
|
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|
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if (smb_password_ok(smb_pass,
|
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(unsigned char *)password,
|
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(uchar *)password)) {
|
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return(True);
|
|
}
|
|
|
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DEBUG(3,("Error smb_password_check failed\n"));
|
|
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)
|
|
{
|
|
if (pwlen == 24) {
|
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/* if it is 24 bytes long then assume it is an encrypted
|
|
password */
|
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return pass_check_smb(user, password, pwd);
|
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}
|
|
|
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return pass_check(user, password, pwlen, pwd,
|
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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));
|
|
StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
|
|
|
|
string_sub(valid,"%S",lp_servicename(snum));
|
|
string_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);
|
|
string_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_GETGRNAM
|
|
{
|
|
struct group *gptr = (struct group *)getgrnam(group);
|
|
char **member;
|
|
if (gptr)
|
|
{
|
|
member = gptr->gr_mem;
|
|
while (member && *member)
|
|
{
|
|
static fstring name;
|
|
fstrcpy(name,*member);
|
|
if (user_ok(name,snum) &&
|
|
password_ok(name,password,pwlen,NULL))
|
|
return(&name[0]);
|
|
member++;
|
|
}
|
|
#ifdef GROUP_CHECK_PWENT
|
|
{
|
|
struct passwd *pwd;
|
|
static fstring tm;
|
|
|
|
setpwent ();
|
|
while (pwd = getpwent ()) {
|
|
if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
|
|
/* This Entry have PASSWORD and same GID then check pwd */
|
|
if (password_ok(NULL, password, pwlen, pwd)) {
|
|
fstrcpy(tm, pwd->pw_name);
|
|
endpwent ();
|
|
return tm;
|
|
}
|
|
}
|
|
}
|
|
endpwent ();
|
|
}
|
|
#endif /* GROUP_CHECK_PWENT */
|
|
}
|
|
}
|
|
#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;
|
|
|
|
*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)))
|
|
{
|
|
|
|
user_struct *vuser = get_valid_user_struct(vuid);
|
|
|
|
/* 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->name,snum) &&
|
|
password_ok(vuser->name, password, pwlen, NULL)) {
|
|
fstrcpy(user, vuser->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_revalidate(snum) || lp_security() > SEC_SHARE) &&
|
|
(vuser != 0) && !vuser->guest &&
|
|
user_ok(vuser->name,snum)) {
|
|
fstrcpy(user,vuser->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));
|
|
|
|
string_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;
|
|
*force = 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)
|
|
{
|
|
pstring buf;
|
|
int plus_allowed = 1;
|
|
char *file_host;
|
|
char *file_user;
|
|
FILE *fp = fopen(equiv_file, "r");
|
|
DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
|
|
if (! fp) return False;
|
|
while(fgets(buf, sizeof(buf), fp))
|
|
{
|
|
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"));
|
|
fclose(fp);
|
|
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))
|
|
{
|
|
fclose(fp);
|
|
DEBUG(5, ("check_user_equiv matched %s%s %s\n",
|
|
(plus ? "+" : "-"), file_host,
|
|
(file_user ? file_user : "")));
|
|
return (plus ? True : False);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
fclose(fp);
|
|
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)) {
|
|
extern int Client;
|
|
if (check_user_equiv(user,client_name(Client),fname))
|
|
return(True);
|
|
}
|
|
|
|
if (lp_use_rhosts())
|
|
{
|
|
char *home = get_home_dir(user);
|
|
if (home) {
|
|
extern int Client;
|
|
slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
|
|
if (check_user_equiv(user,client_name(Client),rhostsfile))
|
|
return(True);
|
|
}
|
|
}
|
|
|
|
return(False);
|
|
}
|
|
|
|
|
|
static struct cli_state pw_cli;
|
|
|
|
/****************************************************************************
|
|
return the client state structure
|
|
****************************************************************************/
|
|
struct cli_state *server_client(void)
|
|
{
|
|
return &pw_cli;
|
|
}
|
|
|
|
/****************************************************************************
|
|
support for server level security
|
|
****************************************************************************/
|
|
struct cli_state *server_cryptkey(void)
|
|
{
|
|
fstring desthost;
|
|
struct in_addr dest_ip;
|
|
extern fstring local_machine;
|
|
char *p;
|
|
BOOL connected_ok = False;
|
|
|
|
if (!cli_initialise(&pw_cli))
|
|
return NULL;
|
|
|
|
p = lp_passwordserver();
|
|
while(p && next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
|
|
standard_sub_basic(desthost);
|
|
strupper(desthost);
|
|
|
|
if(!resolve_name( desthost, &dest_ip)) {
|
|
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(&pw_cli, desthost, &dest_ip)) {
|
|
DEBUG(3,("connected to password server %s\n",desthost));
|
|
connected_ok = True;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!connected_ok) {
|
|
DEBUG(0,("password server not available\n"));
|
|
cli_shutdown(&pw_cli);
|
|
return NULL;
|
|
}
|
|
|
|
if (!cli_session_request(&pw_cli, desthost, 0x20, local_machine)) {
|
|
DEBUG(1,("%s rejected the session\n",desthost));
|
|
cli_shutdown(&pw_cli);
|
|
return NULL;
|
|
}
|
|
|
|
DEBUG(3,("got session\n"));
|
|
|
|
if (!cli_negprot(&pw_cli)) {
|
|
DEBUG(1,("%s rejected the negprot\n",desthost));
|
|
cli_shutdown(&pw_cli);
|
|
return NULL;
|
|
}
|
|
|
|
if (pw_cli.protocol < PROTOCOL_LANMAN2 ||
|
|
!(pw_cli.sec_mode & 1)) {
|
|
DEBUG(1,("%s isn't in user level security mode\n",desthost));
|
|
cli_shutdown(&pw_cli);
|
|
return NULL;
|
|
}
|
|
|
|
DEBUG(3,("password server OK\n"));
|
|
|
|
return &pw_cli;
|
|
}
|
|
|
|
/****************************************************************************
|
|
validate a password with the password server
|
|
****************************************************************************/
|
|
BOOL server_validate(char *user, char *domain,
|
|
char *pass, int passlen,
|
|
char *ntpass, int ntpasslen)
|
|
{
|
|
extern fstring local_machine;
|
|
static unsigned char badpass[24];
|
|
|
|
if (!pw_cli.initialised) {
|
|
DEBUG(1,("password server %s is not connected\n", pw_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 (cli_session_setup(&pw_cli, user, (char *)badpass, sizeof(badpass),
|
|
(char *)badpass, sizeof(badpass), domain)) {
|
|
if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) == 0) {
|
|
DEBUG(0,("server_validate: password server %s allows users as non-guest \
|
|
with a bad password.\n", pw_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(&pw_cli);
|
|
return False;
|
|
}
|
|
cli_ulogoff(&pw_cli);
|
|
}
|
|
|
|
/*
|
|
* 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(&pw_cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
|
|
DEBUG(1,("password server %s rejected the password\n", pw_cli.desthost));
|
|
return False;
|
|
}
|
|
|
|
/* if logged in as guest then reject */
|
|
if ((SVAL(pw_cli.inbuf,smb_vwv2) & 1) != 0) {
|
|
DEBUG(1,("password server %s gave us guest only\n", pw_cli.desthost));
|
|
cli_ulogoff(&pw_cli);
|
|
return(False);
|
|
}
|
|
|
|
/*
|
|
* This patch from Rob Nielsen <ran@adc.com> makes doing
|
|
* the NetWksaUserLogon a dynamic, rather than compile-time
|
|
* parameter, defaulting to on. This is somewhat dangerous
|
|
* as it allows people to turn off this neccessary check,
|
|
* but so many people have had problems with this that I
|
|
* think it is a neccessary change. JRA.
|
|
*/
|
|
|
|
if (lp_net_wksta_user_logon()) {
|
|
DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
|
|
|
|
if (!cli_send_tconX(&pw_cli, "IPC$", "IPC", "", 1)) {
|
|
DEBUG(0,("password server %s refused IPC$ connect\n", pw_cli.desthost));
|
|
cli_ulogoff(&pw_cli);
|
|
return False;
|
|
}
|
|
|
|
if (!cli_NetWkstaUserLogon(&pw_cli,user,local_machine)) {
|
|
DEBUG(0,("password server %s failed NetWkstaUserLogon\n", pw_cli.desthost));
|
|
cli_tdis(&pw_cli);
|
|
cli_ulogoff(&pw_cli);
|
|
return False;
|
|
}
|
|
|
|
if (pw_cli.privilages == 0) {
|
|
DEBUG(0,("password server %s gave guest privilages\n", pw_cli.desthost));
|
|
cli_tdis(&pw_cli);
|
|
cli_ulogoff(&pw_cli);
|
|
return False;
|
|
}
|
|
|
|
if (!strequal(pw_cli.eff_name, user)) {
|
|
DEBUG(0,("password server %s gave different username %s\n",
|
|
pw_cli.desthost,
|
|
pw_cli.eff_name));
|
|
cli_tdis(&pw_cli);
|
|
cli_ulogoff(&pw_cli);
|
|
return False;
|
|
}
|
|
cli_tdis(&pw_cli);
|
|
}
|
|
else {
|
|
DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", pw_cli.desthost));
|
|
}
|
|
|
|
DEBUG(3,("password server %s accepted the password\n", pw_cli.desthost));
|
|
|
|
cli_ulogoff(&pw_cli);
|
|
|
|
return(True);
|
|
}
|
|
|
|
/***********************************************************************
|
|
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)
|
|
{
|
|
unsigned char local_challenge[8];
|
|
unsigned char local_lm_response[24];
|
|
unsigned char local_nt_reponse[24];
|
|
unsigned char trust_passwd[16];
|
|
time_t lct;
|
|
fstring remote_machine;
|
|
char *p;
|
|
struct in_addr dest_ip;
|
|
NET_ID_INFO_CTR ctr;
|
|
NET_USER_INFO_3 info3;
|
|
struct cli_state cli;
|
|
uint32 smb_uid_low;
|
|
BOOL connected_ok = False;
|
|
|
|
/*
|
|
* 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_reponse);
|
|
smb_apasslen = 24;
|
|
smb_ntpasslen = 24;
|
|
smb_apasswd = (char *)local_lm_response;
|
|
smb_ntpasswd = (char *)local_nt_reponse;
|
|
} 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.
|
|
*/
|
|
if(!trust_password_lock( global_myworkgroup, global_myname, False)) {
|
|
DEBUG(0,("domain_client_validate: unable to open the machine account password file for \
|
|
machine %s in domain %s.\n", global_myname, global_myworkgroup ));
|
|
return False;
|
|
}
|
|
|
|
if(get_trust_account_password( trust_passwd, &lct) == False) {
|
|
DEBUG(0,("domain_client_validate: unable to read the machine account password for \
|
|
machine %s in domain %s.\n", global_myname, global_myworkgroup ));
|
|
trust_password_unlock();
|
|
return False;
|
|
}
|
|
|
|
trust_password_unlock();
|
|
|
|
/*
|
|
* Here we check the last change time to see if the machine
|
|
* password needs changing. JRA.
|
|
*/
|
|
|
|
if(time(NULL) > lct + lp_machine_password_timeout())
|
|
global_machine_pasword_needs_changing = True;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
memset(&cli, '\0', sizeof(struct cli_state));
|
|
if(cli_initialise(&cli) == False) {
|
|
DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Treat each name in the 'password server =' line as a potential
|
|
* PDC/BDC. Contact each in turn and try and authenticate.
|
|
*/
|
|
|
|
p = lp_passwordserver();
|
|
while(p && next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
|
|
|
|
standard_sub_basic(remote_machine);
|
|
strupper(remote_machine);
|
|
|
|
if(!resolve_name( remote_machine, &dest_ip)) {
|
|
DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
|
|
continue;
|
|
}
|
|
|
|
if (ismyip(dest_ip)) {
|
|
DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
|
|
continue;
|
|
}
|
|
|
|
if (!cli_connect(&cli, remote_machine, &dest_ip)) {
|
|
DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
|
|
machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
|
|
continue;
|
|
}
|
|
|
|
if (!cli_session_request(&cli, remote_machine, 0x20, global_myname)) {
|
|
DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
cli.protocol = PROTOCOL_NT1;
|
|
|
|
if (!cli_negprot(&cli)) {
|
|
DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
if (cli.protocol != PROTOCOL_NT1) {
|
|
DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
|
|
remote_machine));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Do an anonymous session setup.
|
|
*/
|
|
|
|
if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
|
|
DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
if (!(cli.sec_mode & 1)) {
|
|
DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
|
|
remote_machine));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
|
|
DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
|
|
Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
|
|
cli_shutdown(&cli);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* We have an anonymous connection to IPC$.
|
|
*/
|
|
connected_ok = True;
|
|
break;
|
|
}
|
|
|
|
if (!connected_ok) {
|
|
DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
|
|
cli_shutdown(&cli);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Ok - we have an anonymous connection to the IPC$ share.
|
|
* Now start the NT Domain stuff :-).
|
|
*/
|
|
|
|
if(cli_nt_session_open(&cli, PIPE_NETLOGON, False) == False) {
|
|
DEBUG(0,("domain_client_validate: unable to open the domain client session to \
|
|
machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
cli_shutdown(&cli);
|
|
return False;
|
|
}
|
|
|
|
if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
|
|
DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
|
|
%s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
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);
|
|
|
|
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) {
|
|
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);
|
|
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 */
|
|
|
|
cli_nt_session_close(&cli);
|
|
cli_ulogoff(&cli);
|
|
cli_shutdown(&cli);
|
|
return True;
|
|
}
|