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https://git.openldap.org/openldap/openldap.git
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430 lines
10 KiB
C
430 lines
10 KiB
C
/* bind.c - ldap backend bind function */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/* This is an altered version */
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/*
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* Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
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*
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* Permission is granted to anyone to use this software for any purpose
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* on any computer system, and to alter it and redistribute it, subject
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* to the following restrictions:
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*
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* 1. The author is not responsible for the consequences of use of this
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* software, no matter how awful, even if they arise from flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits should appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits should appear in the documentation.
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*
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* 4. This notice may not be removed or altered.
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*
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*
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*
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* Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
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*
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* This software is being modified by Pierangelo Masarati.
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* The previously reported conditions apply to the modified code as well.
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* Changes in the original code are highlighted where required.
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* Credits for the original code go to the author, Howard Chu.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#define AVL_INTERNAL
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#include "slap.h"
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#include "back-ldap.h"
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#define PRINT_CONNTREE 0
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int
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ldap_back_bind(
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Backend *be,
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Connection *conn,
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Operation *op,
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struct berval *dn,
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struct berval *ndn,
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int method,
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struct berval *cred,
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struct berval *edn
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)
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{
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struct ldapinfo *li = (struct ldapinfo *) be->be_private;
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struct ldapconn *lc;
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struct berval mdn = { 0, NULL };
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int rc = 0;
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lc = ldap_back_getconn(li, conn, op);
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if ( !lc ) {
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return( -1 );
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}
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/*
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* Rewrite the bind dn if needed
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*/
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#ifdef ENABLE_REWRITE
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switch ( rewrite_session( li->rwinfo, "bindDn", dn->bv_val, conn, &mdn.bv_val ) ) {
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case REWRITE_REGEXEC_OK:
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if ( mdn.bv_val == NULL ) {
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mdn.bv_val = ( char * )dn->bv_val;
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
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"[rw] bindDn: \"%s\" -> \"%s\"\n", dn->bv_val, mdn.bv_val ));
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#else /* !NEW_LOGGING */
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Debug( LDAP_DEBUG_ARGS, "rw> bindDn: \"%s\" -> \"%s\"\n%s",
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dn->bv_val, mdn.bv_val, "" );
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#endif /* !NEW_LOGGING */
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break;
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case REWRITE_REGEXEC_UNWILLING:
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send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
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NULL, "Unwilling to perform", NULL, NULL );
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return( -1 );
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case REWRITE_REGEXEC_ERR:
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send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
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NULL, "Operations error", NULL, NULL );
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return( -1 );
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}
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#else /* !ENABLE_REWRITE */
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ldap_back_dn_massage( li, dn, &mdn, 0, 1 );
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#endif /* !ENABLE_REWRITE */
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rc = ldap_bind_s(lc->ld, mdn.bv_val, cred->bv_val, method);
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if (rc != LDAP_SUCCESS) {
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rc = ldap_back_op_result( lc, op );
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} else {
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lc->bound = 1;
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}
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if ( mdn.bv_val != dn->bv_val ) {
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free( mdn.bv_val );
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}
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return( rc );
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}
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/*
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* ldap_back_conn_cmp
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*
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* compares two struct ldapconn based on the value of the conn pointer;
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* used by avl stuff
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*/
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int
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ldap_back_conn_cmp(
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const void *c1,
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const void *c2
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)
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{
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struct ldapconn *lc1 = (struct ldapconn *)c1;
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struct ldapconn *lc2 = (struct ldapconn *)c2;
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return ( ( lc1->conn < lc2->conn ) ? -1 : ( ( lc1->conn > lc2-> conn ) ? 1 : 0 ) );
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}
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/*
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* ldap_back_conn_dup
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*
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* returns -1 in case a duplicate struct ldapconn has been inserted;
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* used by avl stuff
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*/
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int
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ldap_back_conn_dup(
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void *c1,
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void *c2
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)
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{
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struct ldapconn *lc1 = (struct ldapconn *)c1;
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struct ldapconn *lc2 = (struct ldapconn *)c2;
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return( ( lc1->conn == lc2->conn ) ? -1 : 0 );
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}
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#if PRINT_CONNTREE > 0
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static void ravl_print( Avlnode *root, int depth )
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{
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int i;
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if ( root == 0 )
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return;
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ravl_print( root->avl_right, depth+1 );
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for ( i = 0; i < depth; i++ )
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printf( " " );
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printf( "c(%ld) %d\n", ((struct ldapconn *) root->avl_data)->conn->c_connid, root->avl_bf );
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ravl_print( root->avl_left, depth+1 );
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}
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static void myprint( Avlnode *root )
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{
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printf( "********\n" );
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if ( root == 0 )
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printf( "\tNULL\n" );
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else
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ravl_print( root, 0 );
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printf( "********\n" );
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}
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#endif /* PRINT_CONNTREE */
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struct ldapconn *
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ldap_back_getconn(struct ldapinfo *li, Connection *conn, Operation *op)
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{
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struct ldapconn *lc, lc_curr;
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LDAP *ld;
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/* Searches for a ldapconn in the avl tree */
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lc_curr.conn = conn;
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ldap_pvt_thread_mutex_lock( &li->conn_mutex );
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lc = (struct ldapconn *)avl_find( li->conntree,
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(caddr_t)&lc_curr, ldap_back_conn_cmp );
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ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
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/* Looks like we didn't get a bind. Open a new session... */
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if (!lc) {
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int vers = conn->c_protocol;
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int err = ldap_initialize(&ld, li->url);
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if (err != LDAP_SUCCESS) {
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err = ldap_back_map_result(err);
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send_ldap_result( conn, op, err,
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NULL, "ldap_init failed", NULL, NULL );
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return( NULL );
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}
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/* Set LDAP version. This will always succeed: If the client
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* bound with a particular version, then so can we.
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*/
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ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &vers);
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lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
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lc->conn = conn;
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lc->ld = ld;
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#ifdef ENABLE_REWRITE
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/*
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* Sets a cookie for the rewrite session
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*/
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( void )rewrite_session_init( li->rwinfo, conn );
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#endif /* ENABLE_REWRITE */
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if ( lc->conn->c_cdn.bv_len != 0 ) {
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/*
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* Rewrite the bind dn if needed
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*/
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#ifdef ENABLE_REWRITE
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lc->bound_dn.bv_val = NULL;
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lc->bound_dn.bv_len = 0;
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switch ( rewrite_session( li->rwinfo, "bindDn",
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lc->conn->c_cdn.bv_val, conn,
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&lc->bound_dn.bv_val ) ) {
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case REWRITE_REGEXEC_OK:
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if ( lc->bound_dn.bv_val == NULL ) {
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ber_dupbv( &lc->bound_dn, &lc->conn->c_cdn );
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
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"[rw] bindDn: \"%s\" ->"
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" \"%s\"\n%s",
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lc->conn->c_cdn.bv_val,
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lc->bound_dn.bv_val ));
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#else /* !NEW_LOGGING */
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Debug( LDAP_DEBUG_ARGS,
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"rw> bindDn: \"%s\" ->"
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" \"%s\"\n%s",
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lc->conn->c_cdn.bv_val,
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lc->bound_dn.bv_val, "" );
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#endif /* !NEW_LOGGING */
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break;
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case REWRITE_REGEXEC_UNWILLING:
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send_ldap_result( conn, op,
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LDAP_UNWILLING_TO_PERFORM,
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NULL, "Unwilling to perform",
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NULL, NULL );
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return( NULL );
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case REWRITE_REGEXEC_ERR:
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send_ldap_result( conn, op,
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LDAP_OPERATIONS_ERROR,
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NULL, "Operations error",
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NULL, NULL );
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return( NULL );
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}
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#else /* !ENABLE_REWRITE */
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struct berval bv;
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ldap_back_dn_massage( li, &lc->conn->c_cdn, &bv, 0, 1 );
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if ( bv.bv_val == lc->conn->c_cdn.bv_val )
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ber_dupbv( &lc->bound_dn, &bv );
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else
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lc->bound_dn = bv;
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#endif /* !ENABLE_REWRITE */
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} else {
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lc->bound_dn.bv_val = NULL;
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lc->bound_dn.bv_len = 0;
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}
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lc->bound = 0;
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/* Inserts the newly created ldapconn in the avl tree */
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ldap_pvt_thread_mutex_lock( &li->conn_mutex );
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err = avl_insert( &li->conntree, (caddr_t)lc,
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ldap_back_conn_cmp, ldap_back_conn_dup );
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#if PRINT_CONNTREE > 0
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myprint( li->conntree );
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#endif /* PRINT_CONNTREE */
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ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
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#ifdef NEW_LOGGING
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LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
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"ldap_back_getconn: conn %ld inserted\n",
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lc->conn->c_connid ));
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#else /* !NEW_LOGGING */
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Debug( LDAP_DEBUG_TRACE,
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"=>ldap_back_getconn: conn %ld inserted\n%s%s",
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lc->conn->c_connid, "", "" );
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#endif /* !NEW_LOGGING */
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/* Err could be -1 in case a duplicate ldapconn is inserted */
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if ( err != 0 ) {
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send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
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NULL, "internal server error", NULL, NULL );
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/* better destroy the ldapconn struct? */
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return( NULL );
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}
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} else {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
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"ldap_back_getconn: conn %ld inserted\n",
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lc->conn->c_connid ));
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#else /* !NEW_LOGGING */
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Debug( LDAP_DEBUG_TRACE,
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"=>ldap_back_getconn: conn %ld fetched%s%s\n",
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lc->conn->c_connid, "", "" );
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#endif /* !NEW_LOGGING */
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}
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return( lc );
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}
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/*
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* ldap_back_dobind
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*
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* Note: as the check for the value of lc->bound was already here, I removed
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* it from all the callers, and I made the function return the flag, so
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* it can be used to simplify the check.
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*/
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int
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ldap_back_dobind(struct ldapconn *lc, Operation *op)
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{
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if (lc->bound) {
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return( lc->bound );
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}
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if (ldap_bind_s(lc->ld, lc->bound_dn.bv_val, NULL, LDAP_AUTH_SIMPLE) !=
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LDAP_SUCCESS) {
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ldap_back_op_result(lc, op);
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return( 0 );
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} /* else */
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return( lc->bound = 1 );
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}
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/* Map API errors to protocol errors... */
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int
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ldap_back_map_result(int err)
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{
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switch(err)
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{
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case LDAP_SERVER_DOWN:
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return LDAP_UNAVAILABLE;
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case LDAP_LOCAL_ERROR:
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return LDAP_OPERATIONS_ERROR;
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case LDAP_ENCODING_ERROR:
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case LDAP_DECODING_ERROR:
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return LDAP_PROTOCOL_ERROR;
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case LDAP_TIMEOUT:
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return LDAP_UNAVAILABLE;
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case LDAP_AUTH_UNKNOWN:
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return LDAP_AUTH_METHOD_NOT_SUPPORTED;
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case LDAP_FILTER_ERROR:
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return LDAP_OPERATIONS_ERROR;
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case LDAP_USER_CANCELLED:
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return LDAP_OPERATIONS_ERROR;
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case LDAP_PARAM_ERROR:
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return LDAP_PROTOCOL_ERROR;
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case LDAP_NO_MEMORY:
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return LDAP_OPERATIONS_ERROR;
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case LDAP_CONNECT_ERROR:
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return LDAP_UNAVAILABLE;
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case LDAP_NOT_SUPPORTED:
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return LDAP_UNWILLING_TO_PERFORM;
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case LDAP_CONTROL_NOT_FOUND:
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return LDAP_PROTOCOL_ERROR;
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case LDAP_NO_RESULTS_RETURNED:
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return LDAP_NO_SUCH_OBJECT;
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case LDAP_MORE_RESULTS_TO_RETURN:
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return LDAP_OTHER;
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case LDAP_CLIENT_LOOP:
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case LDAP_REFERRAL_LIMIT_EXCEEDED:
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return LDAP_LOOP_DETECT;
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default:
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if LDAP_API_ERROR(err)
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return LDAP_OTHER;
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else
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return err;
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}
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}
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int
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ldap_back_op_result(struct ldapconn *lc, Operation *op)
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{
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int err = LDAP_SUCCESS;
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char *msg = NULL;
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char *match = NULL;
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ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER, &err);
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ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &msg);
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ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
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err = ldap_back_map_result(err);
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#ifdef ENABLE_REWRITE
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/*
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* need rewrite info; mmmh ...
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*/
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#else /* !ENABLE_REWRITE */
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send_ldap_result( lc->conn, op, err, match, msg, NULL, NULL );
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/* better test the pointers before freeing? */
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if ( match ) {
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free( match );
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}
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#endif /* !ENABLE_REWRITE */
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if ( msg ) free( msg );
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return( (err==LDAP_SUCCESS) ? 0 : -1 );
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}
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