/* bind.c - ldap backend bind function */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2005 The OpenLDAP Foundation.
+ * Portions Copyright 2000-2003 Pierangelo Masarati.
+ * Portions Copyright 1999-2003 Howard Chu.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
*/
-/* 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.
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati.
*/
#include "portable.h"
#include <ac/socket.h>
#include <ac/string.h>
+#define AVL_INTERNAL
#include "slap.h"
#include "back-ldap.h"
+#include <lutil_ldap.h>
+
+#define PRINT_CONNTREE 0
+
+static LDAP_REBIND_PROC ldap_back_rebind;
+
+static int
+ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
+
+static int
+ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
+
int
-ldap_back_bind(
- Backend *be,
- Connection *conn,
- Operation *op,
- const char *dn,
- const char *ndn,
- int method,
- struct berval *cred,
- char **edn
-)
+ldap_back_bind( Operation *op, SlapReply *rs )
{
- struct ldapinfo *li = (struct ldapinfo *) be->be_private;
+ struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
struct ldapconn *lc;
- *edn = NULL;
+ int rc = 0;
+ ber_int_t msgid;
+
+ lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
+ if ( !lc ) {
+ return rs->sr_err;
+ }
+
+ if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
+ ch_free( lc->lc_bound_ndn.bv_val );
+ BER_BVZERO( &lc->lc_bound_ndn );
+ }
+ lc->lc_bound = 0;
+
+ /* method is always LDAP_AUTH_SIMPLE if we got here */
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
+ LDAP_SASL_SIMPLE,
+ &op->orb_cred, op->o_ctrls, NULL, &msgid );
+ rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
+
+ if ( rc == LDAP_SUCCESS ) {
+ /* If defined, proxyAuthz will be used also when
+ * back-ldap is the authorizing backend; for this
+ * purpose, a successful bind is followed by a
+ * bind with the configured identity assertion */
+ /* NOTE: use with care */
+ if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
+ ldap_back_proxy_authz_bind( lc, op, rs );
+ if ( lc->lc_bound == 0 ) {
+ rc = 1;
+ goto done;
+ }
+ }
+
+ lc->lc_bound = 1;
+ ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
+
+ if ( LDAP_BACK_SAVECRED( li ) ) {
+ if ( !BER_BVISNULL( &lc->lc_cred ) ) {
+ memset( lc->lc_cred.bv_val, 0,
+ lc->lc_cred.bv_len );
+ ch_free( lc->lc_cred.bv_val );
+ }
+ ber_dupbv( &lc->lc_cred, &op->orb_cred );
+ ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind, lc );
+ }
+ }
+done:;
- lc = ldap_back_getconn(li, conn, op);
- if (!lc)
- return( -1 );
+ /* must re-insert if local DN changed as result of bind */
+ if ( lc->lc_bound && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) {
+ int lerr;
- if (ldap_bind_s(lc->ld, dn, cred->bv_val, method) != LDAP_SUCCESS)
- return( ldap_back_op_result(lc, op) );
+ ldap_pvt_thread_mutex_lock( &li->conn_mutex );
+ lc = avl_delete( &li->conntree, (caddr_t)lc,
+ ldap_back_conn_cmp );
+ if ( !BER_BVISNULL( &lc->lc_local_ndn ) ) {
+ ch_free( lc->lc_local_ndn.bv_val );
+ }
+ ber_dupbv( &lc->lc_local_ndn, &op->o_req_ndn );
+ lerr = avl_insert( &li->conntree, (caddr_t)lc,
+ ldap_back_conn_cmp, ldap_back_conn_dup );
+ ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
+ if ( lerr == -1 ) {
+ ldap_back_conn_free( lc );
+ }
+ }
- lc->bound = 1;
- return( 0 );
+ return( rc );
}
-struct ldapconn *
-ldap_back_getconn(struct ldapinfo *li, Connection *conn, Operation *op)
+/*
+ * 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 )
{
+ const struct ldapconn *lc1 = (const struct ldapconn *)c1;
+ const struct ldapconn *lc2 = (const struct ldapconn *)c2;
+ int rc;
+
+ /* If local DNs don't match, it is definitely not a match */
+ rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
+ if ( rc ) {
+ return rc;
+ }
+
+ /* For shared sessions, conn is NULL. Only explicitly
+ * bound sessions will have non-NULL conn.
+ */
+ return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
+}
+
+/*
+ * 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;
+
+ /* Cannot have more than one shared session with same DN */
+ if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
+ lc1->lc_conn == lc2->lc_conn )
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+#if PRINT_CONNTREE > 0
+static void
+ravl_print( Avlnode *root, int depth )
+{
+ int i;
struct ldapconn *lc;
- LDAP *ld;
+
+ if ( root == 0 ) {
+ return;
+ }
+
+ ravl_print( root->avl_right, depth+1 );
+
+ for ( i = 0; i < depth; i++ ) {
+ printf( " " );
+ }
+
+ lc = root->avl_data;
+ printf( "lc(%lx) local(%s) conn(%lx) %d\n",
+ lc, lc->lc_local_ndn.bv_val, lc->lc_conn, 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 */
+
+int
+ldap_back_freeconn( Operation *op, struct ldapconn *lc )
+{
+ struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- for (lc = li->lcs; lc; lc=lc->next)
- if (lc->conn == conn)
- break;
+ lc = avl_delete( &li->conntree, (caddr_t)lc,
+ ldap_back_conn_cmp );
+ ldap_back_conn_free( (void *)lc );
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.
+ return 0;
+}
+
+static int
+ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+ int vers = op->o_protocol;
+ LDAP *ld = NULL;
+
+ assert( lcp != NULL );
+
+ rs->sr_err = ldap_initialize( &ld, li->url );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto error_return;
+ }
+
+ /* 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, (const void *)&vers );
+
+ /* automatically chase referrals ("[dont-]chase-referrals" statement) */
+ if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
+ ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
+ }
+
+#ifdef HAVE_TLS
+ /* start TLS ("tls-[try-]{start,propagate}" statements) */
+ if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
+ && !ldap_is_ldaps_url( li->url ) )
+ {
+#ifdef SLAP_STARTTLS_ASYNCHRONOUS
+ /*
+ * use asynchronous StartTLS
+ * in case, chase referral (not implemented yet)
+ */
+ int msgid;
+
+ rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ LDAPMessage *res = NULL;
+ int rc, retries = 1;
+ struct timeval tv = { 0, 0 };
+
+retry:;
+ rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ if ( rc < 0 ) {
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == 0 ) {
+ if ( retries ) {
+ retries--;
+ tv.tv_sec = 0;
+ tv.tv_usec = 100000;
+ goto retry;
+ }
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == LDAP_RES_EXTENDED ) {
+ struct berval *data = NULL;
+
+ rs->sr_err = ldap_parse_extended_result( ld, res,
+ NULL, &data, 0 );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ rs->sr_err = ldap_result2error( ld, res, 1 );
+ res = NULL;
+
+ /* FIXME: in case a referral
+ * is returned, should we try
+ * using it instead of the
+ * configured URI? */
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ ldap_install_tls( ld );
+
+ } else if ( rs->sr_err == LDAP_REFERRAL ) {
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
+ }
+
+ if ( data ) {
+ if ( data->bv_val ) {
+ ber_memfree( data->bv_val );
+ }
+ ber_memfree( data );
+ }
+ }
+
+ } else {
+ rs->sr_err = LDAP_OTHER;
+ }
+
+ if ( res != NULL ) {
+ ldap_msgfree( res );
+ }
+ }
+#else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+ /*
+ * use synchronous StartTLS
*/
- ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &vers);
+ rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
+#endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+
+ /* if StartTLS is requested, only attempt it if the URL
+ * is not "ldaps://"; this may occur not only in case
+ * of misconfiguration, but also when used in the chain
+ * overlay, where the "uri" can be parsed out of a referral */
+ if ( rs->sr_err == LDAP_SERVER_DOWN
+ || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
+ {
+ ldap_unbind_ext_s( ld, NULL, NULL );
+ goto error_return;
+ }
+ }
+#endif /* HAVE_TLS */
+
+ if ( *lcp == NULL ) {
+ *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
+ memset( *lcp, 0, sizeof( struct ldapconn ) );
+ }
+ (*lcp)->lc_ld = ld;
+
+error_return:;
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ rs->sr_err = slap_map_api2result( rs );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ if ( rs->sr_text == NULL ) {
+ rs->sr_text = "ldap_initialize() failed";
+ }
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ }
+ }
+
+ return rs->sr_err;
+}
+
+struct ldapconn *
+ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+ struct ldapconn *lc, lc_curr = { 0 };
+
+ /* Searches for a ldapconn in the avl tree */
+
+ /* Explicit binds must not be shared */
+ if ( op->o_tag == LDAP_REQ_BIND
+ || ( op->o_conn
+ && op->o_conn->c_authz_backend
+ && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
+ {
+ lc_curr.lc_conn = op->o_conn;
+
+ } else {
+ lc_curr.lc_conn = NULL;
+ }
+
+ /* Internal searches are privileged and shared. So is root. */
+ if ( op->o_do_not_cache || be_isroot( op ) ) {
+ lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
+ lc_curr.lc_conn = NULL;
+ lc_curr.lc_ispriv = 1;
+
+ } else {
+ lc_curr.lc_local_ndn = op->o_ndn;
+ }
+
+ 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 );
- lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
- lc->conn = conn;
- lc->ld = ld;
- lc->bound = 0;
+ /* Looks like we didn't get a bind. Open a new session... */
+ if ( !lc ) {
+ /* lc here must be NULL */
+ if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
+ return NULL;
+ }
+
+ lc->lc_conn = lc_curr.lc_conn;
+ ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
+
+ ldap_pvt_thread_mutex_init( &lc->lc_mutex );
+
+ if ( lc_curr.lc_ispriv ) {
+ ber_dupbv( &lc->lc_cred, &li->acl_passwd );
+ ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
+ lc->lc_ispriv = lc_curr.lc_ispriv;
+
+ } else {
+ BER_BVZERO( &lc->lc_cred );
+ BER_BVZERO( &lc->lc_bound_ndn );
+ if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
+ && op->o_bd == op->o_conn->c_authz_backend )
+ {
+ ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
+ }
+ }
+
+ lc->lc_bound = 0;
+
+ /* Inserts the newly created ldapconn in the avl tree */
ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- lc->next = li->lcs;
- li->lcs = lc;
+ rs->sr_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 );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
+
+ /* Err could be -1 in case a duplicate ldapconn is inserted */
+ if ( rs->sr_err != 0 ) {
+ ldap_back_conn_free( lc );
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
+ send_ldap_error( op, rs, LDAP_OTHER,
+ "internal server error" );
+ }
+ return NULL;
+ }
+ } else {
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
}
- return( lc );
+
+ return lc;
}
-void
-ldap_back_dobind(struct ldapconn *lc, Operation *op)
+/*
+ * ldap_back_dobind
+ *
+ * Note: as the check for the value of lc->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.
+ */
+static int
+ldap_back_dobind_int(
+ struct ldapconn *lc,
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ int retries )
+{
+ int rc;
+ ber_int_t msgid;
+
+ assert( retries >= 0 );
+
+ if ( !lc->lc_bound ) {
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+
+ /*
+ * FIXME: we need to let clients use proxyAuthz
+ * otherwise we cannot do symmetric pools of servers;
+ * we have to live with the fact that a user can
+ * authorize itself as any ID that is allowed
+ * by the authzTo directive of the "proxyauthzdn".
+ */
+ /*
+ * NOTE: current Proxy Authorization specification
+ * and implementation do not allow proxy authorization
+ * control to be provided with Bind requests
+ */
+ /*
+ * if no bind took place yet, but the connection is bound
+ * and the "idassert-authcDN" (or other ID) is set,
+ * then bind as the asserting identity and explicitly
+ * add the proxyAuthz control to every operation with the
+ * dn bound to the connection as control value.
+ * This is done also if this is the authrizing backend,
+ * but the "override" flag is given to idassert.
+ * It allows to use SASL bind and yet proxyAuthz users
+ */
+ if ( op->o_conn != NULL &&
+ !op->o_do_not_cache &&
+ !be_isroot( op ) &&
+ ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
+ ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
+ {
+ (void)ldap_back_proxy_authz_bind( lc, op, rs );
+ goto done;
+ }
+
+#ifdef HAVE_CYRUS_SASL
+ if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
+ void *defaults = NULL;
+
+#if 1 /* will deal with this later... */
+ if ( li->acl_secprops != NULL ) {
+ rc = ldap_set_option( lc->lc_ld,
+ LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
+
+ if( rc != LDAP_OPT_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
+ "(%s,SECPROPS,\"%s\") failed!\n",
+ li->url, li->acl_secprops, 0 );
+ goto done;
+ }
+ }
+#endif
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ li->acl_sasl_mech.bv_val,
+ li->acl_sasl_realm.bv_val,
+ li->acl_authcID.bv_val,
+ li->acl_passwd.bv_val,
+ NULL );
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
+ li->acl_authcDN.bv_val,
+ li->acl_sasl_mech.bv_val, NULL, NULL,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
+ defaults );
+
+ lutil_sasl_freedefs( defaults );
+
+ rs->sr_err = slap_map_api2result( rs );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ lc->lc_bound = 0;
+ send_ldap_result( op, rs );
+
+ } else {
+ lc->lc_bound = 1;
+ }
+ goto done;
+ }
+#endif /* HAVE_CYRUS_SASL */
+
+retry:;
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld,
+ lc->lc_bound_ndn.bv_val,
+ LDAP_SASL_SIMPLE, &lc->lc_cred,
+ NULL, NULL, &msgid );
+
+ if ( rs->sr_err == LDAP_SERVER_DOWN ) {
+ if ( retries > 0 ) {
+ ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
+
+ /* lc here must be the regular lc, reset and ready for init */
+ if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
+ return 0;
+ }
+
+ retries--;
+ goto retry;
+ }
+
+ ldap_back_freeconn( op, lc );
+ rs->sr_err = slap_map_api2result( rs );
+
+ return 0;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
+ if ( rc == LDAP_SUCCESS ) {
+ lc->lc_bound = 1;
+ }
+ }
+
+done:;
+ rc = lc->lc_bound;
+ return rc;
+}
+
+int
+ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
{
- if (lc->bound)
- return;
+ int rc;
+
+ ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
+ rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
+ ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
- if (ldap_bind_s(lc->ld, lc->conn->c_cdn, NULL, LDAP_AUTH_SIMPLE) !=
- LDAP_SUCCESS)
- ldap_back_op_result(lc, op);
- else
- lc->bound = 1;
+ return rc;
}
-/* Map API errors to protocol errors... */
+/*
+ * ldap_back_rebind
+ *
+ * This is a callback used for chasing referrals using the same
+ * credentials as the original user on this session.
+ */
+static int
+ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
+ ber_int_t msgid, void *params )
+{
+ struct ldapconn *lc = (struct ldapconn *)params;
+
+ /* FIXME: add checks on the URL/identity? */
+
+ return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
+ LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
+}
int
-ldap_back_map_result(int err)
+ldap_back_op_result(
+ struct ldapconn *lc,
+ Operation *op,
+ SlapReply *rs,
+ ber_int_t msgid,
+ ldap_back_send_t sendok )
{
- switch(err)
+ char *match = NULL;
+ LDAPMessage *res = NULL;
+ char *text = NULL;
+
+#define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
+
+ rs->sr_text = NULL;
+ rs->sr_matched = NULL;
+
+ /* if the error recorded in the reply corresponds
+ * to a successful state, get the error from the
+ * remote server response */
+ if ( ERR_OK( rs->sr_err ) ) {
+ int rc;
+ struct timeval tv = { 0, 0 };
+
+retry:;
+ /* if result parsing fails, note the failure reason */
+ switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
+ case 0:
+ tv.tv_sec = 0;
+ tv.tv_usec = 100000; /* 0.1 s */
+ ldap_pvt_thread_yield();
+ goto retry;
+
+ case -1:
+ ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
+ &rs->sr_err );
+ break;
+
+
+ /* otherwise get the result; if it is not
+ * LDAP_SUCCESS, record it in the reply
+ * structure (this includes
+ * LDAP_COMPARE_{TRUE|FALSE}) */
+ default:
+ rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
+ &match, &text, NULL, NULL, 1 );
+ rs->sr_text = text;
+ if ( rc != LDAP_SUCCESS ) {
+ rs->sr_err = rc;
+ }
+ }
+ }
+
+ /* if the error in the reply structure is not
+ * LDAP_SUCCESS, try to map it from client
+ * to server error */
+ if ( !ERR_OK( rs->sr_err ) ) {
+ rs->sr_err = slap_map_api2result( rs );
+
+ /* internal ops ( op->o_conn == NULL )
+ * must not reply to client */
+ if ( op->o_conn && !op->o_do_not_cache && match ) {
+
+ /* record the (massaged) matched
+ * DN into the reply structure */
+ rs->sr_matched = match;
+ }
+ }
+ if ( op->o_conn &&
+ ( ( sendok & LDAP_BACK_SENDOK )
+ || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
{
- 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;
+ send_ldap_result( op, rs );
+ }
+ if ( match ) {
+ if ( rs->sr_matched != match ) {
+ free( (char *)rs->sr_matched );
+ }
+ rs->sr_matched = NULL;
+ ldap_memfree( match );
+ }
+ if ( text ) {
+ ldap_memfree( text );
+ }
+ rs->sr_text = NULL;
+ return( ERR_OK( rs->sr_err ) ? 0 : -1 );
+}
+
+/* return true if bound, false if failed */
+int
+ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ int rc;
+
+ ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
+ ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
+ lc->lc_bound = 0;
+
+ /* lc here must be the regular lc, reset and ready for init */
+ rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
+ if ( rc == LDAP_SUCCESS ) {
+ rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
+ }
+ ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
+
+ return rc;
+}
+
+static int
+ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
+{
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+ struct berval binddn = slap_empty_bv;
+ struct berval bindcred = slap_empty_bv;
+ int dobind = 0;
+ int msgid;
+ int rc;
+
+ /*
+ * FIXME: we need to let clients use proxyAuthz
+ * otherwise we cannot do symmetric pools of servers;
+ * we have to live with the fact that a user can
+ * authorize itself as any ID that is allowed
+ * by the authzTo directive of the "proxyauthzdn".
+ */
+ /*
+ * NOTE: current Proxy Authorization specification
+ * and implementation do not allow proxy authorization
+ * control to be provided with Bind requests
+ */
+ /*
+ * if no bind took place yet, but the connection is bound
+ * and the "proxyauthzdn" is set, then bind as
+ * "proxyauthzdn" and explicitly add the proxyAuthz
+ * control to every operation with the dn bound
+ * to the connection as control value.
+ */
+
+ /* bind as proxyauthzdn only if no idassert mode
+ * is requested, or if the client's identity
+ * is authorized */
+ switch ( li->idassert_mode ) {
+ case LDAP_BACK_IDASSERT_LEGACY:
+ if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
+ if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
+ {
+ binddn = li->idassert_authcDN;
+ bindcred = li->idassert_passwd;
+ dobind = 1;
+ }
+ }
+ break;
+
default:
- if LDAP_API_ERROR(err)
- return LDAP_OTHER;
- else
- return err;
+ if ( li->idassert_authz ) {
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ authcDN = slap_empty_bv;
+ } else {
+ authcDN = op->o_conn->c_ndn;
+ }
+ rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
+ &authcDN, &authcDN );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ send_ldap_result( op, rs );
+ lc->lc_bound = 0;
+ goto done;
+ }
+ }
+
+ binddn = li->idassert_authcDN;
+ bindcred = li->idassert_passwd;
+ dobind = 1;
+ break;
+ }
+
+ if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
+#ifdef HAVE_CYRUS_SASL
+ void *defaults = NULL;
+ struct berval authzID = BER_BVNULL;
+ int freeauthz = 0;
+
+ /* if SASL supports native authz, prepare for it */
+ if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
+ ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
+ {
+ switch ( li->idassert_mode ) {
+ case LDAP_BACK_IDASSERT_OTHERID:
+ case LDAP_BACK_IDASSERT_OTHERDN:
+ authzID = li->idassert_authzID;
+ break;
+
+ case LDAP_BACK_IDASSERT_ANONYMOUS:
+ BER_BVSTR( &authzID, "dn:" );
+ break;
+
+ case LDAP_BACK_IDASSERT_SELF:
+ if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ /* connection is not authc'd, so don't idassert */
+ BER_BVSTR( &authzID, "dn:" );
+ break;
+ }
+ authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
+ authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
+ AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
+ AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
+ op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
+ freeauthz = 1;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+#if 0 /* will deal with this later... */
+ if ( sasl_secprops != NULL ) {
+ rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
+ (void *) sasl_secprops );
+
+ if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
+ send_ldap_result( op, rs );
+ lc->lc_bound = 0;
+ goto done;
+ }
+ }
+#endif
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ li->idassert_sasl_mech.bv_val,
+ li->idassert_sasl_realm.bv_val,
+ li->idassert_authcID.bv_val,
+ li->idassert_passwd.bv_val,
+ authzID.bv_val );
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
+ li->idassert_sasl_mech.bv_val, NULL, NULL,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
+ defaults );
+
+ lutil_sasl_freedefs( defaults );
+ if ( freeauthz ) {
+ slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
+ }
+
+ rs->sr_err = slap_map_api2result( rs );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ lc->lc_bound = 0;
+ send_ldap_result( op, rs );
+
+ } else {
+ lc->lc_bound = 1;
+ }
+ goto done;
+#endif /* HAVE_CYRUS_SASL */
}
+
+ switch ( li->idassert_authmethod ) {
+ case LDAP_AUTH_SIMPLE:
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld,
+ binddn.bv_val, LDAP_SASL_SIMPLE,
+ &bindcred, NULL, NULL, &msgid );
+ break;
+
+ case LDAP_AUTH_NONE:
+ lc->lc_bound = 1;
+ goto done;
+
+ default:
+ /* unsupported! */
+ lc->lc_bound = 0;
+ rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ send_ldap_result( op, rs );
+ goto done;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
+ if ( rc == LDAP_SUCCESS ) {
+ lc->lc_bound = 1;
+ }
+done:;
+ return lc->lc_bound;
+}
+
+/*
+ * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
+ * to existing server-side controls if required; if not,
+ * the existing server-side controls are placed in *pctrls.
+ * The caller, after using the controls in client API
+ * operations, if ( *pctrls != op->o_ctrls ), should
+ * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
+ * The function returns success if the control could
+ * be added if required, or if it did nothing; in the future,
+ * it might return some error if it failed.
+ *
+ * if no bind took place yet, but the connection is bound
+ * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
+ * and explicitly add proxyAuthz the control to every operation
+ * with the dn bound to the connection as control value.
+ *
+ * If no server-side controls are defined for the operation,
+ * simply add the proxyAuthz control; otherwise, if the
+ * proxyAuthz control is not already set, add it as
+ * the first one
+ *
+ * FIXME: is controls order significant for security?
+ * ANSWER: controls ordering and interoperability
+ * must be indicated by the specs of each control; if none
+ * is specified, the order is irrelevant.
+ */
+int
+ldap_back_proxy_authz_ctrl(
+ struct ldapconn *lc,
+ Operation *op,
+ SlapReply *rs,
+ LDAPControl ***pctrls )
+{
+ struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
+ LDAPControl **ctrls = NULL;
+ int i = 0,
+ mode;
+ struct berval assertedID;
+
+ *pctrls = NULL;
+
+ rs->sr_err = LDAP_SUCCESS;
+
+ if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
+ && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
+ goto done;
+ }
+
+ if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
+ goto done;
+ }
+
+ if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
+ if ( op->o_proxy_authz ) {
+ /*
+ * FIXME: we do not want to perform proxyAuthz
+ * on behalf of the client, because this would
+ * be performed with "proxyauthzdn" privileges.
+ *
+ * This might actually be too strict, since
+ * the "proxyauthzdn" authzTo, and each entry's
+ * authzFrom attributes may be crafted
+ * to avoid unwanted proxyAuthz to take place.
+ */
+#if 0
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "proxyAuthz not allowed within namingContext";
+#endif
+ goto done;
+ }
+
+ if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
+ goto done;
+ }
+
+ if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ goto done;
+ }
+
+ if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
+ goto done;
+ }
+
+ } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
+ if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
+ /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
+ {
+ /* already asserted in SASL via native authz */
+ /* NOTE: the test on lc->lc_bound is used to trap
+ * native authorization of anonymous users,
+ * since in that case op->o_conn->c_ndn is NULL */
+ goto done;
+ }
+
+ } else if ( li->idassert_authz ) {
+ int rc;
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ authcDN = slap_empty_bv;
+ } else {
+ authcDN = op->o_conn->c_ndn;
+ }
+ rc = slap_sasl_matches( op, li->idassert_authz,
+ &authcDN, & authcDN );
+ if ( rc != LDAP_SUCCESS ) {
+ /* op->o_conn->c_ndn is not authorized
+ * to use idassert */
+ return rc;
+ }
+ }
+
+ if ( op->o_proxy_authz ) {
+ /*
+ * FIXME: we can:
+ * 1) ignore the already set proxyAuthz control
+ * 2) leave it in place, and don't set ours
+ * 3) add both
+ * 4) reject the operation
+ *
+ * option (4) is very drastic
+ * option (3) will make the remote server reject
+ * the operation, thus being equivalent to (4)
+ * option (2) will likely break the idassert
+ * assumptions, so we cannot accept it;
+ * option (1) means that we are contradicting
+ * the client's reques.
+ *
+ * I think (4) is the only correct choice.
+ */
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "proxyAuthz not allowed within namingContext";
+ }
+
+ if ( op->o_do_not_cache && op->o_is_auth_check ) {
+ mode = LDAP_BACK_IDASSERT_NOASSERT;
+
+ } else {
+ mode = li->idassert_mode;
+ }
+
+ switch ( mode ) {
+ case LDAP_BACK_IDASSERT_LEGACY:
+ case LDAP_BACK_IDASSERT_SELF:
+ /* original behavior:
+ * assert the client's identity */
+ if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ assertedID = slap_empty_bv;
+ } else {
+ assertedID = op->o_conn->c_ndn;
+ }
+ break;
+
+ case LDAP_BACK_IDASSERT_ANONYMOUS:
+ /* assert "anonymous" */
+ assertedID = slap_empty_bv;
+ break;
+
+ case LDAP_BACK_IDASSERT_NOASSERT:
+ /* don't assert; bind as proxyauthzdn */
+ goto done;
+
+ case LDAP_BACK_IDASSERT_OTHERID:
+ case LDAP_BACK_IDASSERT_OTHERDN:
+ /* assert idassert DN */
+ assertedID = li->idassert_authzID;
+ break;
+
+ default:
+ assert( 0 );
+ }
+
+ if ( BER_BVISNULL( &assertedID ) ) {
+ assertedID = slap_empty_bv;
+ }
+
+ if ( op->o_ctrls ) {
+ for ( i = 0; op->o_ctrls[ i ]; i++ )
+ /* just count ctrls */ ;
+ }
+
+ ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
+ ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
+
+ ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
+ ctrls[ 0 ]->ldctl_iscritical = 1;
+
+ switch ( li->idassert_mode ) {
+ /* already in u:ID or dn:DN form */
+ case LDAP_BACK_IDASSERT_OTHERID:
+ case LDAP_BACK_IDASSERT_OTHERDN:
+ ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
+ break;
+
+ /* needs the dn: prefix */
+ default:
+ ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
+ ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
+ AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
+ AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
+ assertedID.bv_val, assertedID.bv_len + 1 );
+ break;
+ }
+
+ if ( op->o_ctrls ) {
+ for ( i = 0; op->o_ctrls[ i ]; i++ ) {
+ ctrls[ i + 1 ] = op->o_ctrls[ i ];
+ }
+ }
+ ctrls[ i + 1 ] = NULL;
+
+done:;
+ if ( ctrls == NULL ) {
+ ctrls = op->o_ctrls;
+ }
+
+ *pctrls = ctrls;
+
+ return rs->sr_err;
}
int
-ldap_back_op_result(struct ldapconn *lc, Operation *op)
+ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
{
- int err;
- char *msg;
- char *match;
-
- 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);
- send_ldap_result( lc->conn, op, err, match, msg, NULL, NULL );
- free(match);
- free(msg);
- return( (err==LDAP_SUCCESS) ? 0 : -1 );
+ LDAPControl **ctrls = *pctrls;
+
+ /* we assume that the first control is the proxyAuthz
+ * added by back-ldap, so it's the only one we explicitly
+ * free */
+ if ( ctrls && ctrls != op->o_ctrls ) {
+ assert( ctrls[ 0 ] );
+
+ if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
+ free( ctrls[ 0 ]->ldctl_value.bv_val );
+ }
+
+ free( ctrls[ 0 ] );
+ free( ctrls );
+ }
+
+ *pctrls = NULL;
+
+ return 0;
}
projects / openldap / blobdiff