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

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