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/*
Unix SMB/Netbios implementation.
Version 1.9.
Password and authentication handling
Copyright (C) Andrew Tridgell 1992-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
extern int DEBUGLEVEL;
/* this holds info on user ids that are already validated for this VC */
static user_struct *validated_users = NULL;
static int num_validated_users = 0;
/****************************************************************************
check if a uid has been validated, and return an pointer to the user_struct
if it has. NULL if not. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
user_struct *get_valid_user_struct(uint16 vuid)
{
if (vuid == UID_FIELD_INVALID)
return NULL;
vuid -= VUID_OFFSET;
if ((vuid >= (uint16)num_validated_users) ||
(validated_users[vuid].uid == (uid_t)-1) || (validated_users[vuid].gid == (gid_t)-1))
return NULL;
return &validated_users[vuid];
}
/****************************************************************************
invalidate a uid
****************************************************************************/
void invalidate_vuid(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
if (vuser == NULL) return;
vuser->uid = (uid_t)-1;
vuser->gid = (gid_t)-1;
vuser->n_sids = 0;
/* same number of igroups as groups */
vuser->n_groups = 0;
if (vuser->groups)
free((char *)vuser->groups);
if (vuser->sids)
free((char *)vuser->sids);
vuser->sids = NULL;
vuser->groups = NULL;
}
/****************************************************************************
return a validated username
****************************************************************************/
char *validated_username(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
if (vuser == NULL)
return 0;
return(vuser->name);
}
/****************************************************************************
register a uid/name pair as being valid and that a valid password
has been given. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest, uchar user_sess_key[16])
{
user_struct *vuser;
struct passwd *pwfile; /* for getting real name from passwd file */
/* Ensure no vuid gets registered in share level security. */
if(lp_security() == SEC_SHARE)
return UID_FIELD_INVALID;
#if 0
/*
* After observing MS-Exchange services writing to a Samba share
* I belive this code is incorrect. Each service does its own
* sessionsetup_and_X for the same user, and as each service shuts
* down, it does a user_logoff_and_X. As we are consolidating multiple
* sessionsetup_and_X's onto the same vuid here, when the first service
* shuts down, it invalidates all the open files for the other services.
* Hence I am removing this code and forcing each sessionsetup_and_X
* to get a new vuid.
* Jeremy Allison. (jallison@whistle.com).
*/
int i;
for(i = 0; i < num_validated_users; i++) {
vuser = &validated_users[i];
if ( vuser->uid == uid )
return (uint16)(i + VUID_OFFSET); /* User already validated */
}
#endif
validated_users = (user_struct *)Realloc(validated_users,
sizeof(user_struct)*
(num_validated_users+1));
if (!validated_users)
{
DEBUG(0,("Failed to realloc users struct!\n"));
num_validated_users = 0;
return UID_FIELD_INVALID;
}
vuser = &validated_users[num_validated_users];
num_validated_users++;
vuser->uid = uid;
vuser->gid = gid;
vuser->guest = guest;
fstrcpy(vuser->name,unix_name);
fstrcpy(vuser->requested_name,requested_name);
memcpy(vuser->dc.user_sess_key, user_sess_key, sizeof(vuser->dc.user_sess_key));
vuser->n_sids = 0;
vuser->sids = NULL;
vuser->n_groups = 0;
vuser->groups = NULL;
/* Find all the groups this uid is in and store them.
Used by become_user() */
get_unixgroups(unix_name,uid,gid,
&vuser->n_groups,
&vuser->groups);
DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
DEBUG(3, ("Clearing default real name\n"));
fstrcpy(vuser->real_name, "<Full Name>\0");
if (lp_unix_realname()) {
if ((pwfile=hashed_getpwnam(vuser->name))!= NULL)
{
DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
fstrcpy(vuser->real_name, pwfile->pw_gecos);
}
}
return (uint16)((num_validated_users - 1) + VUID_OFFSET);
}
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