mirror of
https://git.openldap.org/openldap/openldap.git
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327 lines
6.9 KiB
C
327 lines
6.9 KiB
C
/* bind.c - ldbm backend bind and unbind routines */
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/*
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* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/krb.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include <ac/unistd.h>
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#include "slap.h"
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#include "back-ldbm.h"
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#include "proto-back-ldbm.h"
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#include <lutil.h>
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#ifdef HAVE_KERBEROS
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extern int krbv4_ldap_auth();
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#endif
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static int
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crypted_value_find(
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struct berval **vals,
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struct berval *v,
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int syntax,
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int normalize,
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struct berval *cred
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)
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{
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int i;
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for ( i = 0; vals[i] != NULL; i++ ) {
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if ( syntax != SYNTAX_BIN ) {
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int result;
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#ifdef SLAPD_CRYPT
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ldap_pvt_thread_mutex_lock( &crypt_mutex );
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#endif
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result = lutil_passwd(
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(char*) cred->bv_val,
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(char*) vals[i]->bv_val,
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NULL );
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#ifdef SLAPD_CRYPT
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ldap_pvt_thread_mutex_unlock( &crypt_mutex );
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#endif
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return result;
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} else {
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if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
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return( 0 );
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}
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}
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}
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return( 1 );
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}
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int
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ldbm_back_bind(
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Backend *be,
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Connection *conn,
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Operation *op,
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char *dn,
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int method,
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char *mech,
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struct berval *cred,
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char** edn
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)
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{
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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Entry *e;
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Attribute *a;
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int rc;
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Entry *matched;
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#ifdef HAVE_KERBEROS
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char krbname[MAX_K_NAME_SZ + 1];
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AUTH_DAT ad;
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#endif
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Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
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*edn = NULL;
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/* get entry with reader lock */
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if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
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char *matched_dn = NULL;
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struct berval **refs = NULL;
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if( matched != NULL ) {
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matched_dn = ch_strdup( matched->e_dn );
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refs = is_entry_referral( matched )
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? get_entry_referrals( be, conn, op, matched )
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: NULL;
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cache_return_entry_r( &li->li_cache, matched );
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} else {
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refs = default_referral;
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}
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/* allow noauth binds */
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rc = 1;
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if ( method == LDAP_AUTH_SIMPLE ) {
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if( cred->bv_len == 0 ) {
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/* SUCCESS */
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send_ldap_result( conn, op, LDAP_SUCCESS,
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NULL, NULL, NULL, NULL );
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} else if ( be_isroot_pw( be, dn, cred ) ) {
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*edn = ch_strdup( be_root_dn( be ) );
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rc = 0; /* front end will send result */
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} else {
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send_ldap_result( conn, op, LDAP_REFERRAL,
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matched_dn, NULL, refs, NULL );
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}
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} else if ( method == LDAP_AUTH_SASL ) {
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if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
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/* insert DIGEST calls here */
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send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
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NULL, NULL, NULL, NULL );
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} else {
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send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
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NULL, NULL, NULL, NULL );
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}
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} else {
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send_ldap_result( conn, op, LDAP_REFERRAL,
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matched_dn, NULL, refs, NULL );
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}
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if ( matched != NULL ) {
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ber_bvecfree( refs );
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free( matched_dn );
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}
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return( rc );
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}
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*edn = ch_strdup( e->e_dn );
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/* check for deleted */
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if ( ! access_allowed( be, conn, op, e,
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"entry", NULL, ACL_AUTH ) )
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{
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send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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if ( is_entry_alias( e ) ) {
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/* entry is an alias, don't allow bind */
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Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
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0, 0 );
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send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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if ( is_entry_referral( e ) ) {
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/* entry is a referral, don't allow bind */
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struct berval **refs = get_entry_referrals( be,
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conn, op, e );
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Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
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0, 0 );
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send_ldap_result( conn, op, LDAP_REFERRAL,
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e->e_dn, NULL, refs, NULL );
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ber_bvecfree( refs );
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rc = 1;
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goto return_results;
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}
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switch ( method ) {
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case LDAP_AUTH_SIMPLE:
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if ( cred->bv_len == 0 ) {
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send_ldap_result( conn, op, LDAP_SUCCESS,
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NULL, NULL, NULL, NULL );
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/* stop front end from sending result */
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rc = 1;
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goto return_results;
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}
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/* check for root dn/passwd */
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if ( be_isroot_pw( be, dn, cred ) ) {
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/* front end will send result */
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if(*edn != NULL) free( *edn );
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*edn = ch_strdup( be_root_dn( be ) );
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rc = 0;
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goto return_results;
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}
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if ( ! access_allowed( be, conn, op, e,
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"userpassword", NULL, ACL_AUTH ) )
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{
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send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
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send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
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NULL, NULL, NULL, NULL );
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/* stop front end from sending result */
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rc = 1;
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goto return_results;
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}
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if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
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{
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send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
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NULL, NULL, NULL, NULL );
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/* stop front end from sending result */
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rc = 1;
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goto return_results;
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}
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rc = 0;
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break;
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#ifdef HAVE_KERBEROS
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case LDAP_AUTH_KRBV41:
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if ( ! access_allowed( be, conn, op, e,
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"krbname", NULL, ACL_AUTH ) )
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{
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send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
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send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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if ( ! access_allowed( be, conn, op, e,
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"krbname", NULL, ACL_AUTH ) )
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{
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send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
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: "", ad.pinst, ad.prealm );
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if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
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/*
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* no krbName values present: check against DN
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*/
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if ( strcasecmp( dn, krbname ) == 0 ) {
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rc = 0;
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break;
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}
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send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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} else { /* look for krbName match */
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struct berval krbval;
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krbval.bv_val = krbname;
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krbval.bv_len = strlen( krbname );
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if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
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send_ldap_result( conn, op,
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LDAP_INVALID_CREDENTIALS,
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NULL, NULL, NULL, NULL );
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rc = 1;
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goto return_results;
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}
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}
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rc = 0;
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break;
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case LDAP_AUTH_KRBV42:
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send_ldap_result( conn, op, LDAP_SUCCESS,
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NULL, NULL, NULL, NULL );
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/* stop front end from sending result */
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rc = 1;
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goto return_results;
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#endif
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case LDAP_AUTH_SASL:
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/* insert SASL code here */
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default:
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send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
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NULL, "auth method not supported", NULL, NULL );
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rc = 1;
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goto return_results;
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}
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return_results:;
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/* free entry and reader lock */
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cache_return_entry_r( &li->li_cache, e );
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/* front end with send result on success (rc==0) */
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return( rc );
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}
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