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openldap/servers/slapd/backend.c
Kurt Zeilenga f6829ee903 Initial commit of new ACL engine. Engine supports descrete access 
privs, additive/substractive rules, and rule continuation.  Existing
rules that use 'defaultaccess none' should be 100% compatible.  Rules
that rely other defaultaccess settings will require addition of
explicit clauses granting the access.
Needs additional testing and tuning of logs
1999-10-21 17:53:56 +00:00

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/* $OpenLDAP$ */
/*
* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/* backend.c - routines for dealing with back-end databases */
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <sys/stat.h>
#include "slap.h"
#include "lutil.h"
#ifdef SLAPD_LDAP
#include "back-ldap/external.h"
#endif
#ifdef SLAPD_LDBM
#include "back-ldbm/external.h"
#endif
#ifdef SLAPD_BDB2
#include "back-bdb2/external.h"
#endif
#ifdef SLAPD_PASSWD
#include "back-passwd/external.h"
#endif
#ifdef SLAPD_PERL
#include "back-perl/external.h"
#endif
#ifdef SLAPD_SHELL
#include "back-shell/external.h"
#endif
#ifdef SLAPD_TCL
#include "back-tcl/external.h"
#endif
static BackendInfo binfo[] = {
#if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
{"ldap", ldap_back_initialize},
#endif
#if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
{"ldbm", ldbm_back_initialize},
#endif
#if defined(SLAPD_BDB2) && !defined(SLAPD_BDB2_DYNAMIC)
{"bdb2", bdb2_back_initialize},
#endif
#if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
{"passwd", passwd_back_initialize},
#endif
#if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
{"perl", perl_back_initialize},
#endif
#if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
{"shell", shell_back_initialize},
#endif
#if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
{"tcl", tcl_back_initialize},
#endif
{NULL}
};
int nBackendInfo = 0;
BackendInfo *backendInfo = NULL;
int nBackendDB = 0;
BackendDB *backendDB = NULL;
int backend_init(void)
{
int rc = -1;
if((nBackendInfo != 0) || (backendInfo != NULL)) {
/* already initialized */
Debug( LDAP_DEBUG_ANY,
"backend_init: already initialized.\n", 0, 0, 0 );
return -1;
}
for( ;
binfo[nBackendInfo].bi_type != NULL;
nBackendInfo++ )
{
rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_init: initialized for type \"%s\"\n",
binfo[nBackendInfo].bi_type, 0, 0 );
/* destroy those we've already inited */
for( nBackendInfo--;
nBackendInfo >= 0 ;
nBackendInfo-- )
{
if ( binfo[nBackendInfo].bi_destroy ) {
binfo[nBackendInfo].bi_destroy(
&binfo[nBackendInfo] );
}
}
return rc;
}
}
if ( nBackendInfo > 0) {
backendInfo = binfo;
return 0;
}
#ifdef SLAPD_MODULES
return 0;
#else
Debug( LDAP_DEBUG_ANY,
"backend_init: failed\n",
0, 0, 0 );
return rc;
#endif /* SLAPD_MODULES */
}
int backend_add(BackendInfo *aBackendInfo)
{
int rc = 0;
if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_add: initialization for type \"%s\" failed\n",
aBackendInfo->bi_type, 0, 0 );
return rc;
}
/* now add the backend type to the Backend Info List */
{
BackendInfo *newBackendInfo = 0;
/* if backendInfo == binfo no deallocation of old backendInfo */
if (backendInfo == binfo) {
newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
memcpy(newBackendInfo, backendInfo, sizeof(BackendInfo) *
nBackendInfo);
} else {
newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
(nBackendInfo + 1));
}
memcpy(&newBackendInfo[nBackendInfo], aBackendInfo,
sizeof(BackendInfo));
backendInfo = newBackendInfo;
nBackendInfo++;
return 0;
}
}
int backend_startup(Backend *be)
{
int i;
int rc = 0;
if( ! ( nBackendDB > 0 ) ) {
/* no databases */
Debug( LDAP_DEBUG_ANY,
"backend_startup: %d databases to startup.\n",
nBackendDB, 0, 0 );
return 1;
}
if(be != NULL) {
/* startup a specific backend database */
Debug( LDAP_DEBUG_TRACE,
"backend_startup: starting database\n",
0, 0, 0 );
if ( be->bd_info->bi_open ) {
rc = be->bd_info->bi_open( be->bd_info );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open failed!\n",
0, 0, 0 );
return rc;
}
if ( be->bd_info->bi_db_open ) {
rc = be->bd_info->bi_db_open( be );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open failed!\n",
0, 0, 0 );
return rc;
}
return rc;
}
/* open each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_nDB == 0) {
/* no database of this type, don't open */
continue;
}
if( backendInfo[i].bi_open ) {
rc = backendInfo[i].bi_open(
&backendInfo[i] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open %d failed!\n",
i, 0, 0 );
return rc;
}
}
/* open each backend database */
for( i = 0; i < nBackendDB; i++ ) {
/* append global access controls */
acl_append( &backendDB[i].be_acl, global_acl );
if ( backendDB[i].bd_info->bi_db_open ) {
rc = backendDB[i].bd_info->bi_db_open(
&backendDB[i] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open %d failed!\n",
i, 0, 0 );
return rc;
}
}
return rc;
}
int backend_num( Backend *be )
{
int i;
if( be == NULL ) return -1;
for( i = 0; i < nBackendDB; i++ ) {
if( be == &backendDB[i] ) return i;
}
return -1;
}
int backend_shutdown( Backend *be )
{
int i;
int rc = 0;
if( be != NULL ) {
/* shutdown a specific backend database */
if ( be->bd_info->bi_nDB == 0 ) {
/* no database of this type, we never opened it */
return 0;
}
if ( be->bd_info->bi_db_close ) {
be->bd_info->bi_db_close( be );
}
if( be->bd_info->bi_close ) {
be->bd_info->bi_close( be->bd_info );
}
return 0;
}
/* close each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].bd_info->bi_db_close ) {
backendDB[i].bd_info->bi_db_close(
&backendDB[i] );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_close: bi_close %s failed!\n",
backendDB[i].be_type, 0, 0 );
}
}
/* close each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_nDB == 0 ) {
/* no database of this type */
continue;
}
if( backendInfo[i].bi_close ) {
backendInfo[i].bi_close(
&backendInfo[i] );
}
}
return 0;
}
int backend_destroy(void)
{
int i;
/* destroy each backend database */
for( i = 0; i < nBackendDB; i++ ) {
if ( backendDB[i].bd_info->bi_db_destroy ) {
backendDB[i].bd_info->bi_db_destroy(
&backendDB[i] );
}
}
/* destroy each backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( backendInfo[i].bi_destroy ) {
backendInfo[i].bi_destroy(
&backendInfo[i] );
}
}
#ifdef SLAPD_MODULES
if (backendInfo != binfo) {
free(backendInfo);
}
#endif /* SLAPD_MODULES */
nBackendInfo = 0;
backendInfo = NULL;
return 0;
}
BackendInfo* backend_info(const char *type)
{
int i;
/* search for the backend type */
for( i = 0; i < nBackendInfo; i++ ) {
if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
return &backendInfo[i];
}
}
return NULL;
}
BackendDB *
backend_db_init(
const char *type
)
{
Backend *be;
BackendInfo *bi = backend_info(type);
int rc = 0;
if( bi == NULL ) {
fprintf( stderr, "Unrecognized database type (%s)\n", type );
return NULL;
}
backendDB = (BackendDB *) ch_realloc(
(char *) backendDB,
(nBackendDB + 1) * sizeof(Backend) );
memset( &backendDB[nbackends], '\0', sizeof(Backend) );
be = &backends[nbackends++];
be->bd_info = bi;
be->be_sizelimit = defsize;
be->be_timelimit = deftime;
be->be_dfltaccess = global_default_access;
/* assign a default depth limit for alias deref */
be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
be->be_realm = global_realm != NULL
? ch_strdup( global_realm ) : NULL;
if(bi->bi_db_init) {
rc = bi->bi_db_init( be );
}
if(rc != 0) {
fprintf( stderr, "database init failed (%s)\n", type );
nbackends--;
return NULL;
}
bi->bi_nDB++;
return( be );
}
void
be_db_close( void )
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].bd_info->bi_db_close ) {
(*backends[i].bd_info->bi_db_close)( &backends[i] );
}
}
}
Backend *
select_backend( const char * dn )
{
int i, j, len, dnlen;
dnlen = strlen( dn );
for ( i = 0; i < nbackends; i++ ) {
for ( j = 0; backends[i].be_nsuffix != NULL &&
backends[i].be_nsuffix[j] != NULL; j++ )
{
len = strlen( backends[i].be_nsuffix[j] );
if ( len > dnlen ) {
continue;
}
if ( strcmp( backends[i].be_nsuffix[j],
dn + (dnlen - len) ) == 0 ) {
return( &backends[i] );
}
}
}
#ifdef LDAP_ALLOW_NULL_SEARCH_BASE
/* Add greg@greg.rim.or.jp
* It's quick hack for cheap client
* Some browser offer a NULL base at ldap_search
*
* Should only be used as a last resort. -Kdz
*/
if(dnlen == 0) {
Debug( LDAP_DEBUG_TRACE,
"select_backend: use default backend\n", 0, 0, 0 );
return( &backends[0] );
}
#endif /* LDAP_ALLOW_NULL_SEARCH_BASE */
return( NULL );
}
int
be_issuffix(
Backend *be,
const char *suffix
)
{
int i;
for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
if ( strcmp( be->be_nsuffix[i], suffix ) == 0 ) {
return( 1 );
}
}
return( 0 );
}
int
be_isroot( Backend *be, const char *ndn )
{
int rc;
if ( ndn == NULL || be->be_root_ndn == NULL ) {
return( 0 );
}
rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
return(rc);
}
char *
be_root_dn( Backend *be )
{
if ( be->be_root_dn == NULL ) {
return( "" );
}
return be->be_root_dn;
}
int
be_isroot_pw( Backend *be, const char *ndn, struct berval *cred )
{
int result;
if ( ! be_isroot( be, ndn ) ) {
return( 0 );
}
#ifdef SLAPD_CRYPT
ldap_pvt_thread_mutex_lock( &crypt_mutex );
#endif
result = lutil_passwd( cred->bv_val, be->be_root_pw, NULL );
#ifdef SLAPD_CRYPT
ldap_pvt_thread_mutex_unlock( &crypt_mutex );
#endif
return result == 0;
}
int
be_entry_release_rw( Backend *be, Entry *e, int rw )
{
if ( be->be_release ) {
/* free and release entry from backend */
return be->be_release( be, e, rw );
} else {
/* free entry */
entry_free( e );
return 0;
}
}
int
backend_unbind(
Connection *conn,
Operation *op
)
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_unbind ) {
(*backends[i].be_unbind)( &backends[i], conn, op );
}
}
return 0;
}
int
backend_connection_init(
Connection *conn
)
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_connection_init ) {
(*backends[i].be_connection_init)( &backends[i], conn);
}
}
return 0;
}
int
backend_connection_destroy(
Connection *conn
)
{
int i;
for ( i = 0; i < nbackends; i++ ) {
if ( backends[i].be_connection_destroy ) {
(*backends[i].be_connection_destroy)( &backends[i], conn);
}
}
return 0;
}
int
backend_group(
Backend *be,
Entry *target,
const char *gr_ndn,
const char *op_ndn,
const char *objectclassValue,
const char *groupattrName
)
{
if (be->be_group)
return( be->be_group(be, target, gr_ndn, op_ndn,
objectclassValue, groupattrName) );
else
return(1);
}
#ifdef SLAPD_SCHEMA_DN
Attribute *backend_subschemasubentry( Backend *be )
{
/* should be backend specific */
static struct berval ss_val = {
sizeof(SLAPD_SCHEMA_DN)-1,
SLAPD_SCHEMA_DN };
static struct berval *ss_vals[2] = { &ss_val, NULL };
static Attribute ss_attr = {
"subschemasubentry",
ss_vals,
SYNTAX_DN | SYNTAX_CIS,
NULL
};
return &ss_attr;
}
#endif
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