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/*
Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Bartlett 2002
Copyright (C) Jelmer Vernooij 2002
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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_PASSDB
/** List of various built-in passdb modules */
const struct pdb_init_function_entry builtin_pdb_init_functions[] = {
{ "smbpasswd", pdb_init_smbpasswd },
{ "smbpasswd_nua", pdb_init_smbpasswd_nua },
{ "tdbsam", pdb_init_tdbsam },
{ "tdbsam_nua", pdb_init_tdbsam_nua },
{ "ldapsam", pdb_init_ldapsam },
{ "ldapsam_nua", pdb_init_ldapsam_nua },
{ "unixsam", pdb_init_unixsam },
{ "plugin", pdb_init_plugin },
{ NULL, NULL}
};
static BOOL context_setsampwent(struct pdb_context *context, BOOL update)
{
if ((!context) || (!context->pdb_methods) || (!context->pdb_methods->setsampwent)) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
context->pwent_methods = context->pdb_methods;
if (!context->pwent_methods) {
/* No passdbs at all */
return True;
}
while(!(context->pwent_methods->setsampwent(context->pwent_methods, update))){
context->pwent_methods = context->pwent_methods->next;
if(context->pwent_methods == NULL)return False;
}
return True;
}
static void context_endsampwent(struct pdb_context *context)
{
if ((!context)){
DEBUG(0, ("invalid pdb_context specified!\n"));
return;
}
if(context->pwent_methods && context->pwent_methods->endsampwent)
context->pwent_methods->endsampwent(context->pwent_methods);
/* So we won't get strange data when calling getsampwent now */
context->pwent_methods = NULL;
}
static BOOL context_getsampwent(struct pdb_context *context, SAM_ACCOUNT *user)
{
if ((!context) || (!context->pwent_methods)) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
/* Loop until we find something useful */
while((!context->pwent_methods->getsampwent) ||
context->pwent_methods->getsampwent(context->pwent_methods, user) == False){
if(context->pwent_methods->endsampwent)
context->pwent_methods->endsampwent(context->pwent_methods);
context->pwent_methods = context->pwent_methods->next;
/* All methods are checked now. There are no more entries */
if(context->pwent_methods == NULL)return False;
if(!context->pwent_methods->setsampwent){
DEBUG(5, ("invalid context->pwent_methods->setsampwent\n"));
return False;
}
context->pwent_methods->setsampwent(context->pwent_methods, False);
}
user->methods = context->pwent_methods;
return True;
}
static BOOL context_getsampwnam(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const char *username)
{
struct pdb_methods *curmethods;
if ((!context)) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
curmethods = context->pdb_methods;
while(curmethods){
if(curmethods->getsampwnam && curmethods->getsampwnam(curmethods, sam_acct, username) == True){
sam_acct->methods = curmethods;
return True;
}
curmethods = curmethods->next;
}
return False;
}
static BOOL context_getsampwrid(struct pdb_context *context, SAM_ACCOUNT *sam_acct, uint32 rid)
{
struct pdb_methods *curmethods;
if ((!context)) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
curmethods = context->pdb_methods;
while(curmethods){
if(curmethods->getsampwrid && curmethods->getsampwrid(curmethods, sam_acct, rid) == True){
sam_acct->methods = curmethods;
return True;
}
curmethods = curmethods->next;
}
return False;
}
static BOOL context_add_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
if ((!context) || (!context->pdb_methods) || (!context->pdb_methods->add_sam_account)) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
/** @todo This is where a 're-read on add' should be done */
/* We now add a new account to the first database listed.
* Should we? */
return context->pdb_methods->add_sam_account(context->pdb_methods, sam_acct);
}
static BOOL context_update_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
if (!context) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
if(!sam_acct || !sam_acct->methods){
DEBUG(0, ("invalid sam_acct specified\n"));
return False;
}
if(!sam_acct->methods->update_sam_account){
DEBUG(0, ("invalid sam_acct->methods\n"));
return False;
}
/** @todo This is where a 're-read on update' should be done */
return sam_acct->methods->update_sam_account(sam_acct->methods, sam_acct);
}
static BOOL context_delete_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
struct pdb_methods *pdb_selected;
if (!context) {
DEBUG(0, ("invalid pdb_context specified!\n"));
return False;
}
if(!sam_acct->methods){
pdb_selected = context->pdb_methods;
/* There's no passdb backend specified for this account.
* Try to delete it in every passdb available */
while(pdb_selected){
if(pdb_selected->delete_sam_account && pdb_selected->delete_sam_account(pdb_selected, sam_acct)){
return True;
}
pdb_selected = pdb_selected->next;
}
return False;
}
if(!sam_acct->methods->delete_sam_account){
DEBUG(0,("invalid sam_acct->methods->delete_sam_account\n"));
return False;
}
return sam_acct->methods->delete_sam_account(sam_acct->methods, sam_acct);
}
static void free_pdb_context(struct pdb_context **context)
{
struct pdb_methods *pdb_selected = (*context)->pdb_methods;
while(pdb_selected){
if(pdb_selected->free_private_data)
pdb_selected->free_private_data(pdb_selected->private_data);
pdb_selected = pdb_selected->next;
}
talloc_destroy((*context)->mem_ctx);
*context = NULL;
}
/******************************************************************
Make a pdb_methods from scratch
*******************************************************************/
static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
{
char *module_name = smb_xstrdup(selected);
char *module_location = NULL, *p;
NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
int i;
p = strchr(module_name, ':');
if (p) {
*p = 0;
module_location = p+1;
trim_string(module_location, " ", " ");
}
trim_string(module_name, " ", " ");
DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
for (i = 0; builtin_pdb_init_functions[i].name; i++)
{
if (strequal(builtin_pdb_init_functions[i].name, module_name))
{
DEBUG(5,("Found pdb backend %s (at pos %d)\n", module_name, i));
if (NT_STATUS_IS_OK(nt_status
= builtin_pdb_init_functions[i].init(context, methods, module_location))) {
DEBUG(5,("pdb backend %s has a valid init\n", selected));
} else {
DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
}
break;
}
}
if (!*methods) {
DEBUG(0,("failed to select passdb backed!\n"));
if (NT_STATUS_IS_OK(nt_status)) {
return NT_STATUS_INVALID_PARAMETER;
} else {
return nt_status;
}
}
return NT_STATUS_OK;
}
/******************************************************************
Make a pdb_context from scratch.
*******************************************************************/
static NTSTATUS make_pdb_context(struct pdb_context **context)
{
TALLOC_CTX *mem_ctx;
mem_ctx = talloc_init_named("pdb_context internal allocation context");
if (!mem_ctx) {
DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
return NT_STATUS_NO_MEMORY;
}
*context = talloc(mem_ctx, sizeof(**context));
if (!*context) {
DEBUG(0, ("make_pdb_context: talloc failed!\n"));
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(*context);
(*context)->mem_ctx = mem_ctx;
(*context)->pdb_setsampwent = context_setsampwent;
(*context)->pdb_endsampwent = context_endsampwent;
(*context)->pdb_getsampwent = context_getsampwent;
(*context)->pdb_getsampwnam = context_getsampwnam;
(*context)->pdb_getsampwrid = context_getsampwrid;
(*context)->pdb_add_sam_account = context_add_sam_account;
(*context)->pdb_update_sam_account = context_update_sam_account;
(*context)->pdb_delete_sam_account = context_delete_sam_account;
(*context)->pdb_methods = NULL;
(*context)->pwent_methods = NULL;
(*context)->free_fn = free_pdb_context;
return NT_STATUS_OK;
}
/******************************************************************
Make a pdb_context, given a text string.
*******************************************************************/
NTSTATUS make_pdb_context_name(struct pdb_context **context, const char *selected)
{
/* HINT: Don't store 'selected' becouse its often an lp_ string and will 'go away' */
char *conf = smb_xstrdup(selected);
char *confcur = conf, *confnext;
struct pdb_methods *curmethods, *tmpmethods;
NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
if(!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))){
return nt_status;
}
while(confcur){
if(strchr(confcur, ' ')){
confnext = strchr(confcur,' ');
*confnext = '\0';
confnext++;
}else confnext = NULL;
/* Try to initialise pdb */
DEBUG(5,("Trying to load: %s\n", confcur));
if(!NT_STATUS_IS_OK(make_pdb_methods_name(&curmethods, *context, confcur))){
DEBUG(5, ("Loading %s failed!\n", confcur));
SAFE_FREE(curmethods);
continue;
}
curmethods->parent = *context;
DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
if(!confnext)break;
confcur = confnext;
}
SAFE_FREE(conf);
nt_status = NT_STATUS_OK;
return nt_status;
}
/******************************************************************
Return an already initialised pdb_context, to facilitate backward
compatibility (see functions below).
*******************************************************************/
static struct pdb_context *pdb_get_static_context(BOOL reload)
{
static struct pdb_context *pdb_context = NULL;
if ((pdb_context) && (reload)) {
pdb_context->free_fn(&pdb_context);
if (!NT_STATUS_IS_OK(make_pdb_context_name(&pdb_context, lp_passdb_backend()))) {
return NULL;
}
}
if (!pdb_context) {
if (!NT_STATUS_IS_OK(make_pdb_context_name(&pdb_context, lp_passdb_backend()))) {
return NULL;
}
}
return pdb_context;
}
#if !defined(WITH_NISPLUS_SAM)
/******************************************************************
Backward compatibility functions for the original passdb interface
*******************************************************************/
BOOL pdb_setsampwent(BOOL update)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_setsampwent(pdb_context, update);
}
void pdb_endsampwent(void)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return;
}
pdb_context->pdb_endsampwent(pdb_context);
}
BOOL pdb_getsampwent(SAM_ACCOUNT *user)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_getsampwent(pdb_context, user);
}
BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_getsampwnam(pdb_context, sam_acct, username);
}
BOOL pdb_getsampwrid(SAM_ACCOUNT *sam_acct, uint32 rid)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_getsampwrid(pdb_context, sam_acct, rid);
}
BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_add_sam_account(pdb_context, sam_acct);
}
BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_update_sam_account(pdb_context, sam_acct);
}
BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct)
{
struct pdb_context *pdb_context = pdb_get_static_context(False);
if (!pdb_context) {
return False;
}
return pdb_context->pdb_delete_sam_account(pdb_context, sam_acct);
}
#endif /* !defined(WITH_NISPLUS_SAM) */
/***************************************************************
Initialize the static context (at smbd startup etc).
If uninitialised, context will auto-init on first use.
***************************************************************/
BOOL initialize_password_db(BOOL reload)
{
return (pdb_get_static_context(reload) != NULL);
}
NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods)
{
*methods = talloc(mem_ctx, sizeof(struct pdb_methods));
if (!*methods) {
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(*methods);
return NT_STATUS_OK;
}
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