mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
a0171765ff
Style, doco and DEBUG() fixes for auth_smbpasswd.c
(In particular for the account control call).
Andrew Bartlett
(This used to be commit 3d91c11942
)
583 lines
16 KiB
C
583 lines
16 KiB
C
/*
|
|
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;
|
|
extern int Protocol;
|
|
extern struct in_addr ipzero;
|
|
|
|
/* users from session setup */
|
|
static pstring session_users="";
|
|
|
|
extern pstring global_myname;
|
|
extern fstring global_myworkgroup;
|
|
|
|
/* this holds info on user ids that are already validated for this VC */
|
|
static user_struct *validated_users;
|
|
static int next_vuid = VUID_OFFSET;
|
|
static int num_validated_vuids;
|
|
|
|
/****************************************************************************
|
|
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)
|
|
{
|
|
user_struct *usp;
|
|
int count=0;
|
|
|
|
if (vuid == UID_FIELD_INVALID)
|
|
return NULL;
|
|
|
|
for (usp=validated_users;usp;usp=usp->next,count++) {
|
|
if (vuid == usp->vuid) {
|
|
if (count > 10) {
|
|
DLIST_PROMOTE(validated_users, usp);
|
|
}
|
|
return usp;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
invalidate a uid
|
|
****************************************************************************/
|
|
void invalidate_vuid(uint16 vuid)
|
|
{
|
|
user_struct *vuser = get_valid_user_struct(vuid);
|
|
|
|
if (vuser == NULL)
|
|
return;
|
|
|
|
session_yield(vuid);
|
|
|
|
DLIST_REMOVE(validated_users, vuser);
|
|
|
|
safe_free(vuser->groups);
|
|
delete_nt_token(&vuser->nt_user_token);
|
|
safe_free(vuser);
|
|
num_validated_vuids--;
|
|
}
|
|
|
|
/****************************************************************************
|
|
invalidate all vuid entries for this process
|
|
****************************************************************************/
|
|
void invalidate_all_vuids(void)
|
|
{
|
|
user_struct *usp, *next=NULL;
|
|
|
|
for (usp=validated_users;usp;usp=next) {
|
|
next = usp->next;
|
|
|
|
invalidate_vuid(usp->vuid);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
return a validated username
|
|
****************************************************************************/
|
|
char *validated_username(uint16 vuid)
|
|
{
|
|
user_struct *vuser = get_valid_user_struct(vuid);
|
|
if (vuser == NULL)
|
|
return 0;
|
|
return(vuser->user.unix_name);
|
|
}
|
|
|
|
/****************************************************************************
|
|
return a validated domain
|
|
****************************************************************************/
|
|
char *validated_domain(uint16 vuid)
|
|
{
|
|
user_struct *vuser = get_valid_user_struct(vuid);
|
|
if (vuser == NULL)
|
|
return 0;
|
|
return(vuser->user.domain);
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Create the SID list for this user.
|
|
****************************************************************************/
|
|
|
|
NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
|
|
{
|
|
extern DOM_SID global_sid_World;
|
|
extern DOM_SID global_sid_Network;
|
|
extern DOM_SID global_sid_Builtin_Guests;
|
|
extern DOM_SID global_sid_Authenticated_Users;
|
|
NT_USER_TOKEN *token;
|
|
DOM_SID *psids;
|
|
int i, psid_ndx = 0;
|
|
size_t num_sids = 0;
|
|
fstring sid_str;
|
|
|
|
if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
|
|
return NULL;
|
|
|
|
ZERO_STRUCTP(token);
|
|
|
|
/* We always have uid/gid plus World and Network and Authenticated Users or Guest SIDs. */
|
|
num_sids = 5 + ngroups;
|
|
|
|
if ((token->user_sids = (DOM_SID *)malloc( num_sids*sizeof(DOM_SID))) == NULL) {
|
|
free(token);
|
|
return NULL;
|
|
}
|
|
|
|
psids = token->user_sids;
|
|
|
|
/*
|
|
* Note - user SID *MUST* be first in token !
|
|
* se_access_check depends on this.
|
|
*/
|
|
|
|
uid_to_sid( &psids[psid_ndx++], uid);
|
|
|
|
/*
|
|
* Primary group SID is second in token. Convention.
|
|
*/
|
|
|
|
gid_to_sid( &psids[psid_ndx++], gid);
|
|
|
|
/* Now add the group SIDs. */
|
|
|
|
for (i = 0; i < ngroups; i++) {
|
|
if (groups[i] != gid) {
|
|
gid_to_sid( &psids[psid_ndx++], groups[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally add the "standard" SIDs.
|
|
* The only difference between guest and "anonymous" (which we
|
|
* don't really support) is the addition of Authenticated_Users.
|
|
*/
|
|
|
|
sid_copy( &psids[psid_ndx++], &global_sid_World);
|
|
sid_copy( &psids[psid_ndx++], &global_sid_Network);
|
|
|
|
if (is_guest)
|
|
sid_copy( &psids[psid_ndx++], &global_sid_Builtin_Guests);
|
|
else
|
|
sid_copy( &psids[psid_ndx++], &global_sid_Authenticated_Users);
|
|
|
|
token->num_sids = psid_ndx;
|
|
|
|
/* Dump list of sids in token */
|
|
|
|
for (i = 0; i < token->num_sids; i++) {
|
|
DEBUG(5, ("user token sid %s\n",
|
|
sid_to_string(sid_str, &token->user_sids[i])));
|
|
}
|
|
|
|
return token;
|
|
}
|
|
|
|
/****************************************************************************
|
|
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.
|
|
****************************************************************************/
|
|
|
|
int register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
|
|
char *domain,BOOL guest, char *full_name)
|
|
{
|
|
user_struct *vuser = NULL;
|
|
|
|
/* Ensure no vuid gets registered in share level security. */
|
|
if(lp_security() == SEC_SHARE)
|
|
return UID_FIELD_INVALID;
|
|
|
|
/* Limit allowed vuids to 16bits - VUID_OFFSET. */
|
|
if (num_validated_vuids >= 0xFFFF-VUID_OFFSET)
|
|
return UID_FIELD_INVALID;
|
|
|
|
if((vuser = (user_struct *)malloc( sizeof(user_struct) )) == NULL) {
|
|
DEBUG(0,("Failed to malloc users struct!\n"));
|
|
return UID_FIELD_INVALID;
|
|
}
|
|
|
|
ZERO_STRUCTP(vuser);
|
|
|
|
DEBUG(10,("register_vuid: (%u,%u) %s %s %s guest=%d\n", (unsigned int)uid, (unsigned int)gid,
|
|
unix_name, requested_name, domain, guest ));
|
|
|
|
/* Allocate a free vuid. Yes this is a linear search... :-) */
|
|
while( get_valid_user_struct(next_vuid) != NULL ) {
|
|
next_vuid++;
|
|
/* Check for vuid wrap. */
|
|
if (next_vuid == UID_FIELD_INVALID)
|
|
next_vuid = VUID_OFFSET;
|
|
}
|
|
|
|
DEBUG(10,("register_vuid: allocated vuid = %u\n", (unsigned int)next_vuid ));
|
|
|
|
vuser->vuid = next_vuid;
|
|
vuser->uid = uid;
|
|
vuser->gid = gid;
|
|
vuser->guest = guest;
|
|
fstrcpy(vuser->user.unix_name,unix_name);
|
|
fstrcpy(vuser->user.smb_name,requested_name);
|
|
fstrcpy(vuser->user.domain,domain);
|
|
fstrcpy(vuser->user.full_name, full_name);
|
|
DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,vuser->user.full_name));
|
|
|
|
vuser->n_groups = 0;
|
|
vuser->groups = NULL;
|
|
|
|
/* Find all the groups this uid is in and store them.
|
|
Used by become_user() */
|
|
initialise_groups(unix_name, uid, gid);
|
|
get_current_groups( &vuser->n_groups, &vuser->groups);
|
|
|
|
/* Create an NT_USER_TOKEN struct for this user. */
|
|
vuser->nt_user_token = create_nt_token(uid,gid, vuser->n_groups, vuser->groups, guest);
|
|
|
|
next_vuid++;
|
|
num_validated_vuids++;
|
|
|
|
DLIST_ADD(validated_users, vuser);
|
|
|
|
if (!session_claim(vuser->vuid)) {
|
|
DEBUG(1,("Failed to claim session for vuid=%d\n", vuser->vuid));
|
|
invalidate_vuid(vuser->vuid);
|
|
return -1;
|
|
}
|
|
|
|
return vuser->vuid;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
add a name to the session users list
|
|
****************************************************************************/
|
|
void add_session_user(char *user)
|
|
{
|
|
fstring suser;
|
|
StrnCpy(suser,user,sizeof(suser)-1);
|
|
|
|
if (!Get_Pwnam(suser,True)) return;
|
|
|
|
if (suser && *suser && !in_list(suser,session_users,False))
|
|
{
|
|
if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring))
|
|
DEBUG(1,("Too many session users??\n"));
|
|
else
|
|
{
|
|
pstrcat(session_users," ");
|
|
pstrcat(session_users,suser);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
check if a username is valid
|
|
****************************************************************************/
|
|
BOOL user_ok(char *user,int snum)
|
|
{
|
|
char **valid, **invalid;
|
|
BOOL ret;
|
|
|
|
valid = invalid = NULL;
|
|
ret = True;
|
|
|
|
if (lp_invalid_users(snum)) {
|
|
lp_list_copy(&invalid, lp_invalid_users(snum));
|
|
if (invalid && lp_list_substitute(invalid, "%S", lp_servicename(snum))) {
|
|
ret = !user_in_list(user, invalid);
|
|
}
|
|
}
|
|
if (invalid) lp_list_free (&invalid);
|
|
|
|
if (ret && lp_valid_users(snum)) {
|
|
lp_list_copy(&valid, lp_valid_users(snum));
|
|
if (valid && lp_list_substitute(valid, "%S", lp_servicename(snum))) {
|
|
ret = user_in_list(user,valid);
|
|
}
|
|
}
|
|
if (valid) lp_list_free (&valid);
|
|
|
|
if (ret && lp_onlyuser(snum)) {
|
|
char **user_list = lp_list_make (lp_username(snum));
|
|
if (user_list && lp_list_substitute(user_list, "%S", lp_servicename(snum))) {
|
|
ret = user_in_list(user, user_list);
|
|
}
|
|
if (user_list) lp_list_free (&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)) {
|
|
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)) {
|
|
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.
|
|
Note this is *NOT* used when logging on using sessionsetup_and_X.
|
|
****************************************************************************/
|
|
|
|
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 DEBUG_PASSWORD
|
|
DEBUG(100,("authorise_login: checking authorisation on user=%s pass=%s\n",
|
|
user,password));
|
|
#endif
|
|
|
|
*guest = False;
|
|
|
|
if (GUEST_ONLY(snum))
|
|
*force = True;
|
|
|
|
if (!GUEST_ONLY(snum) && (lp_security() > SEC_SHARE)) {
|
|
|
|
/*
|
|
* We should just use the given vuid from a sessionsetup_and_X.
|
|
*/
|
|
|
|
if (!vuser) {
|
|
DEBUG(1,("authorise_login: refusing user %s with no session setup\n",
|
|
user));
|
|
return False;
|
|
}
|
|
|
|
if (!vuser->guest && user_ok(vuser->user.unix_name,snum)) {
|
|
fstrcpy(user,vuser->user.unix_name);
|
|
*guest = False;
|
|
DEBUG(3,("authorise_login: ACCEPTED: validated uid ok as non-guest \
|
|
(user=%s)\n", user));
|
|
return True;
|
|
}
|
|
}
|
|
|
|
/* 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) && GUEST_OK(snum))) {
|
|
/* check the given username and password */
|
|
if (!ok && (*user) && user_ok(user,snum)) {
|
|
ok = password_ok(user,password, pwlen);
|
|
if (ok)
|
|
DEBUG(3,("authorise_login: ACCEPTED: given username (%s) password ok\n",
|
|
user ));
|
|
}
|
|
|
|
/* 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)) {
|
|
fstrcpy(user, vuser->user.unix_name);
|
|
vuser->guest = False;
|
|
DEBUG(3,("authorise_login: 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)) {
|
|
ok = True;
|
|
fstrcpy(user,user2);
|
|
DEBUG(3,("authorise_login: ACCEPTED: session list username (%s) \
|
|
and given password ok\n", user));
|
|
}
|
|
}
|
|
|
|
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,("authorise_login: ACCEPTED: validated uid (%s) as non-guest\n",
|
|
user));
|
|
ok = True;
|
|
}
|
|
|
|
/* 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,("authorise_login: ACCEPTED: group username \
|
|
and given password ok (%s)\n", user));
|
|
}
|
|
} else {
|
|
fstring user2;
|
|
fstrcpy(user2,auser);
|
|
if (user_ok(user2,snum) && password_ok(user2,password,pwlen)) {
|
|
ok = True;
|
|
fstrcpy(user,user2);
|
|
DEBUG(3,("authorise_login: ACCEPTED: user list username \
|
|
and given password ok (%s)\n", user));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} /* 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,("authorise_login: ACCEPTED: guest account and guest ok (%s)\n",
|
|
user));
|
|
} else {
|
|
DEBUG(0,("authorise_login: Invalid guest account %s??\n",guestname));
|
|
}
|
|
*guest = True;
|
|
}
|
|
|
|
if (ok && !user_ok(user,snum)) {
|
|
DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
|
|
ok = False;
|
|
}
|
|
|
|
return(ok);
|
|
}
|