openldap/servers/slapd/back-ldbm/bind.c

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/* bind.c - ldbm backend bind and unbind routines */
/* $OpenLDAP$ */
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/*
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* Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/krb.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/unistd.h>
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#include "slap.h"
#include "back-ldbm.h"
#include "proto-back-ldbm.h"
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int
ldbm_back_bind(
Backend *be,
Connection *conn,
Operation *op,
struct berval *dn,
struct berval *ndn,
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int method,
struct berval *cred,
struct berval *edn
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)
{
struct ldbminfo *li = (struct ldbminfo *) be->be_private;
Entry *e;
Attribute *a;
int rc;
Entry *matched;
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
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char krbname[MAX_K_NAME_SZ + 1];
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AttributeDescription *krbattr = slap_schema.si_ad_krbName;
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AUTH_DAT ad;
#endif
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AttributeDescription *password = slap_schema.si_ad_userPassword;
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#ifdef NEW_LOGGING
LDAP_LOG( BACK_LDBM, ENTRY,
"ldbm_back_bind: dn: %s.\n", dn->bv_val, 0, 0 );
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#else
Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn->bv_val, 0, 0);
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#endif
dn = ndn;
/* grab giant lock for reading */
ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
/* get entry with reader lock */
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if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
char *matched_dn = NULL;
BerVarray refs = NULL;
if( matched != NULL ) {
matched_dn = ch_strdup( matched->e_dn );
refs = is_entry_referral( matched )
? get_entry_referrals( be, conn, op, matched )
: NULL;
cache_return_entry_r( &li->li_cache, matched );
} else {
refs = referral_rewrite( default_referral,
NULL, dn, LDAP_SCOPE_DEFAULT );
}
ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
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/* allow noauth binds */
rc = 1;
if ( method == LDAP_AUTH_SIMPLE ) {
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if ( be_isroot_pw( be, conn, dn, cred ) ) {
ber_dupbv( edn, be_root_dn( be ) );
rc = 0; /* front end will send result */
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} else if ( refs != NULL ) {
send_ldap_result( conn, op, LDAP_REFERRAL,
matched_dn, NULL, refs, NULL );
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} else {
send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
}
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} else if ( refs != NULL ) {
send_ldap_result( conn, op, LDAP_REFERRAL,
matched_dn, NULL, refs, NULL );
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} else {
send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
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}
if ( refs ) ber_bvarray_free( refs );
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if ( matched_dn ) free( matched_dn );
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return( rc );
}
ber_dupbv( edn, &e->e_name );
/* check for deleted */
if ( is_entry_alias( e ) ) {
/* entry is an alias, don't allow bind */
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#ifdef NEW_LOGGING
LDAP_LOG( BACK_LDBM, INFO,
"ldbm_back_bind: entry (%s) is an alias.\n", e->e_dn, 0, 0 );
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#else
Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
0, 0 );
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#endif
send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
NULL, "entry is alias", NULL, NULL );
rc = 1;
goto return_results;
}
if ( is_entry_referral( e ) ) {
/* entry is a referral, don't allow bind */
BerVarray refs = get_entry_referrals( be,
conn, op, e );
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#ifdef NEW_LOGGING
LDAP_LOG( BACK_LDBM, INFO,
"ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
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#else
Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
0, 0 );
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#endif
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if( refs != NULL ) {
send_ldap_result( conn, op, LDAP_REFERRAL,
e->e_dn, NULL, refs, NULL );
} else {
send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
}
ber_bvarray_free( refs );
rc = 1;
goto return_results;
}
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switch ( method ) {
case LDAP_AUTH_SIMPLE:
/* check for root dn/passwd */
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if ( be_isroot_pw( be, conn, dn, cred ) ) {
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/* front end will send result */
if(edn->bv_val != NULL) free( edn->bv_val );
ber_dupbv( edn, be_root_dn( be ) );
rc = 0;
goto return_results;
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}
if ( ! access_allowed( be, conn, op, e,
password, NULL, ACL_AUTH, NULL ) )
{
send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
NULL, NULL, NULL, NULL );
rc = 1;
goto return_results;
}
if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
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send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
NULL, NULL, NULL, NULL );
/* stop front end from sending result */
rc = 1;
goto return_results;
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}
if ( slap_passwd_check( conn, a, cred ) != 0 ) {
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send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
/* stop front end from sending result */
rc = 1;
goto return_results;
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}
rc = 0;
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break;
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
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case LDAP_AUTH_KRBV41:
if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
rc = 1;
goto return_results;
}
if ( ! access_allowed( be, conn, op, e,
krbattr, NULL, ACL_AUTH, NULL ) )
{
send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
NULL, NULL, NULL, NULL );
rc = 1;
goto return_results;
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}
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sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
: "", ad.pinst, ad.prealm );
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if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
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/*
* no krbname values present: check against DN
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*/
if ( strcasecmp( dn->bv_val, krbname ) == 0 ) {
rc = 0;
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break;
}
send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
NULL, NULL, NULL, NULL );
rc = 1;
goto return_results;
} else { /* look for krbname match */
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struct berval krbval;
krbval.bv_val = krbname;
krbval.bv_len = strlen( krbname );
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if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
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send_ldap_result( conn, op,
LDAP_INVALID_CREDENTIALS,
NULL, NULL, NULL, NULL );
rc = 1;
goto return_results;
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}
}
rc = 0;
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break;
case LDAP_AUTH_KRBV42:
send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, "Kerberos bind step 2 not supported",
NULL, NULL );
/* stop front end from sending result */
rc = LDAP_UNWILLING_TO_PERFORM;
goto return_results;
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#endif
default:
send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
NULL, "authentication method not supported", NULL, NULL );
rc = 1;
goto return_results;
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}
return_results:;
/* free entry and reader lock */
cache_return_entry_r( &li->li_cache, e );
ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
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/* front end will send result on success (rc==0) */
return( rc );
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}