/* bind.c - ldap backend bind function */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
- * 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.
+/* 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.
*
- * 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.
+ * 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati.
*/
#include "portable.h"
#include <stdio.h>
+#include <ac/errno.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 LDAP_REBIND_PROC ldap_back_default_rebind;
+
+LDAP_REBIND_PROC *ldap_back_rebind_f = ldap_back_default_rebind;
+
+static int
+ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs );
+
+static int
+ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
int
-ldap_back_bind(
- Operation *op,
- SlapReply *rs )
+ldap_back_bind( Operation *op, SlapReply *rs )
{
- struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
- struct ldapconn *lc;
+ ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
+ ldapconn_t *lc;
- struct berval mdn = { 0, NULL };
int rc = 0;
ber_int_t msgid;
- dncookie dc;
- lc = ldap_back_getconn(op, rs);
+ lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
if ( !lc ) {
- return( -1 );
+ return rs->sr_err;
}
- /*
- * Rewrite the bind dn if needed
- */
- dc.rwmap = &li->rwmap;
-#ifdef ENABLE_REWRITE
- dc.conn = op->o_conn;
- dc.rs = rs;
- dc.ctx = "bindDn";
-#else
- dc.tofrom = 1;
- dc.normalized = 0;
-#endif
- if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
- send_ldap_result( op, rs );
- return -1;
+ if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
+ ch_free( lc->lc_bound_ndn.bv_val );
+ BER_BVZERO( &lc->lc_bound_ndn );
}
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
- if ( lc->bound_dn.bv_val ) {
- ch_free( lc->bound_dn.bv_val );
- lc->bound_dn.bv_len = 0;
- lc->bound_dn.bv_val = NULL;
- }
- lc->bound = 0;
/* method is always LDAP_AUTH_SIMPLE if we got here */
- rs->sr_err = ldap_sasl_bind(lc->ld, mdn.bv_val, LDAP_SASL_SIMPLE,
- &op->oq_bind.rb_cred, op->o_ctrls, NULL, &msgid);
- rc = ldap_back_op_result( lc, op, rs, msgid, 1 );
- if (rc == LDAP_SUCCESS) {
- lc->bound = 1;
- if ( mdn.bv_val != op->o_req_dn.bv_val ) {
- lc->bound_dn = mdn;
- } else {
- ber_dupbv( &lc->bound_dn, &op->o_req_dn );
+ 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, 0, 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->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
+ ldap_back_proxy_authz_bind( lc, op, rs );
+ if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
+ rc = 1;
+ goto done;
+ }
}
- mdn.bv_val = NULL;
- if ( li->savecred ) {
- if ( lc->cred.bv_val ) {
- memset( lc->cred.bv_val, 0, lc->cred.bv_len );
- ch_free( lc->cred.bv_val );
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ 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 );
}
- ber_dupbv( &lc->cred, &op->oq_bind.rb_cred );
- ldap_set_rebind_proc( lc->ld, ldap_back_rebind, lc );
+ ber_bvreplace( &lc->lc_cred, &op->orb_cred );
+ ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind_f, lc );
}
}
+done:;
/* must re-insert if local DN changed as result of bind */
- if ( lc->bound && !bvmatch(&op->o_req_ndn, &lc->local_dn ) ) {
- int lerr;
+ if ( LDAP_BACK_CONN_ISBOUND( lc )
+ && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) )
+ {
+ int lerr;
+
+ /* wait for all other ops to release the connection */
+retry_lock:;
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ if ( lc->lc_refcnt > 1 ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ ldap_pvt_thread_yield();
+ goto retry_lock;
+ }
- ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- lc = avl_delete( &li->conntree, (caddr_t)lc,
+ assert( lc->lc_refcnt == 1 );
+ lc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
ldap_back_conn_cmp );
- if ( lc->local_dn.bv_val )
- ch_free( lc->local_dn.bv_val );
- ber_dupbv( &lc->local_dn, &op->o_req_ndn );
- lerr = avl_insert( &li->conntree, (caddr_t)lc,
+ assert( lc != NULL );
+
+ ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
+ lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
ldap_back_conn_cmp, ldap_back_conn_dup );
- ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
if ( lerr == -1 ) {
+ /* we can do this because lc_refcnt == 1 */
ldap_back_conn_free( lc );
+ lc = NULL;
}
}
- if ( mdn.bv_val && mdn.bv_val != op->o_req_dn.bv_val ) {
- free( mdn.bv_val );
+ if ( lc != NULL ) {
+ ldap_back_release_conn( op, rs, lc );
}
return( rc );
/*
* ldap_back_conn_cmp
*
- * compares two struct ldapconn based on the value of the conn pointer;
+ * compares two ldapconn_t based on the value of the conn pointer;
* used by avl stuff
*/
int
-ldap_back_conn_cmp(
- const void *c1,
- const void *c2
- )
+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;
+ const ldapconn_t *lc1 = (const ldapconn_t *)c1;
+ const ldapconn_t *lc2 = (const ldapconn_t *)c2;
int rc;
-
+
/* If local DNs don't match, it is definitely not a match */
- if ( ( rc = ber_bvcmp( &lc1->local_dn, &lc2->local_dn )) )
+ 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->conn, lc2->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;
+ * returns -1 in case a duplicate ldapconn_t has been inserted;
* used by avl stuff
*/
int
-ldap_back_conn_dup(
- void *c1,
- void *c2
- )
+ldap_back_conn_dup( void *c1, void *c2 )
{
- struct ldapconn *lc1 = (struct ldapconn *)c1;
- struct ldapconn *lc2 = (struct ldapconn *)c2;
+ ldapconn_t *lc1 = (ldapconn_t *)c1;
+ ldapconn_t *lc2 = (ldapconn_t *)c2;
/* Cannot have more than one shared session with same DN */
- if ( dn_match( &lc1->local_dn, &lc2->local_dn ) &&
- lc1->conn == lc2->conn ) return -1;
+ 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 )
+static void
+ravl_print( Avlnode *root, int depth )
{
- int i;
- struct ldapconn *lc;
+ int i;
+ ldapconn_t *lc;
- if ( root == 0 )
+ if ( root == 0 ) {
return;
+ }
ravl_print( root->avl_right, depth+1 );
- for ( i = 0; i < depth; i++ )
+ for ( i = 0; i < depth; i++ ) {
printf( " " );
+ }
lc = root->avl_data;
printf( "lc(%lx) local(%s) conn(%lx) %d\n",
- lc, lc->local_dn.bv_val, lc->conn, root->avl_bf );
+ 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 )
+static void
+myprint( Avlnode *root )
{
printf( "********\n" );
- if ( root == 0 )
+ if ( root == 0 ) {
printf( "\tNULL\n" );
- else
+ } else {
ravl_print( root, 0 );
+ }
printf( "********\n" );
}
#endif /* PRINT_CONNTREE */
-struct ldapconn *
-ldap_back_getconn(Operation *op, SlapReply *rs)
+int
+ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
{
- struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
- struct ldapconn *lc, lc_curr;
- LDAP *ld;
- int is_priv = 0;
+ ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
- /* Searches for a ldapconn in the avl tree */
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ }
- /* Explicit binds must not be shared */
- if ( op->o_tag == LDAP_REQ_BIND
- || (op->o_conn
- && (op->o_bd == op->o_conn->c_authz_backend ))) {
- lc_curr.conn = op->o_conn;
- } else {
- lc_curr.conn = NULL;
+ assert( lc->lc_refcnt > 0 );
+ if ( --lc->lc_refcnt == 0 ) {
+ lc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
+ ldap_back_conn_cmp );
+ assert( lc != NULL );
+
+ ldap_back_conn_free( (void *)lc );
}
-
- /* Internal searches are privileged and shared. So is root. */
- if ( op->o_do_not_cache || be_isroot( li->be, &op->o_ndn ) ) {
- lc_curr.local_dn = li->be->be_rootndn;
- lc_curr.conn = NULL;
- is_priv = 1;
+
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+
+ return 0;
+}
+
+#ifdef HAVE_TLS
+static int
+ldap_back_start_tls(
+ LDAP *ld,
+ int protocol,
+ int *is_tls,
+ const char *url,
+ unsigned flags,
+ int retries,
+ const char **text )
+{
+ int rc = LDAP_SUCCESS;
+ ldapinfo_t dummy;
+
+ /* this is ridiculous... */
+ dummy.li_flags = flags;
+
+ /* start TLS ("tls-[try-]{start,propagate}" statements) */
+ if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
+ && !ldap_is_ldaps_url( url ) )
+ {
+#ifdef SLAP_STARTTLS_ASYNCHRONOUS
+ /*
+ * use asynchronous StartTLS
+ * in case, chase referral (not implemented yet)
+ */
+ int msgid;
+
+ if ( protocol == 0 ) {
+ ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
+ (void *)&protocol );
+ }
+
+ if ( protocol < LDAP_VERSION3 ) {
+ protocol = LDAP_VERSION3;
+ /* Set LDAP version */
+ ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
+ (const void *)&protocol );
+ }
+
+ rc = ldap_start_tls( ld, NULL, NULL, &msgid );
+ if ( rc == LDAP_SUCCESS ) {
+ LDAPMessage *res = NULL;
+ struct timeval tv;
+
+ LDAP_BACK_TV_SET( &tv );
+
+retry:;
+ rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ if ( rc < 0 ) {
+ rc = LDAP_UNAVAILABLE;
+
+ } else if ( rc == 0 ) {
+ if ( retries != LDAP_BACK_RETRY_NEVER ) {
+ ldap_pvt_thread_yield();
+ if ( retries > 0 ) {
+ retries--;
+ }
+ LDAP_BACK_TV_SET( &tv );
+ goto retry;
+ }
+ rc = LDAP_UNAVAILABLE;
+
+ } else if ( rc == LDAP_RES_EXTENDED ) {
+ struct berval *data = NULL;
+
+ rc = ldap_parse_extended_result( ld, res,
+ NULL, &data, 0 );
+ if ( rc == LDAP_SUCCESS ) {
+ int err;
+ rc = ldap_parse_result( ld, res, &err,
+ NULL, NULL, NULL, NULL, 1 );
+ if ( rc == LDAP_SUCCESS ) {
+ rc = err;
+ }
+ res = NULL;
+
+ /* FIXME: in case a referral
+ * is returned, should we try
+ * using it instead of the
+ * configured URI? */
+ if ( rc == LDAP_SUCCESS ) {
+ rc = ldap_install_tls( ld );
+
+ } else if ( rc == LDAP_REFERRAL ) {
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ *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 {
+ rc = LDAP_OTHER;
+ }
+
+ if ( res != NULL ) {
+ ldap_msgfree( res );
+ }
+ }
+#else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+ /*
+ * use synchronous StartTLS
+ */
+ rc = 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 */
+ switch ( rc ) {
+ case LDAP_SUCCESS:
+ *is_tls = 1;
+ break;
+
+ case LDAP_SERVER_DOWN:
+ break;
+
+ default:
+ if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
+ *text = "could not start TLS";
+ break;
+ }
+
+ /* in case Start TLS is not critical */
+ *is_tls = 0;
+ rc = LDAP_SUCCESS;
+ break;
+ }
+
} else {
- lc_curr.local_dn = op->o_ndn;
+ *is_tls = 0;
}
- 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 );
+ return rc;
+}
+#endif /* HAVE_TLS */
- /* Looks like we didn't get a bind. Open a new session... */
- if (!lc) {
- int vers = op->o_protocol;
- rs->sr_err = ldap_initialize(&ld, li->url);
-
- if (rs->sr_err != LDAP_SUCCESS) {
- rs->sr_err = ldap_back_map_result(rs);
- if (rs->sr_text == NULL) {
+static int
+ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ int vers = op->o_protocol;
+ LDAP *ld = NULL;
+#ifdef HAVE_TLS
+ int is_tls = op->o_conn->c_is_tls;
+#endif /* HAVE_TLS */
+
+ assert( lcp != NULL );
+
+ rs->sr_err = ldap_initialize( &ld, li->li_uri );
+ 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.
+ */
+ if ( vers == 0 ) {
+ /* assume it's an internal op; set to LDAPv3 */
+ vers = LDAP_VERSION3;
+ }
+ 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
+ rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
+ li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ ldap_unbind_ext( ld, NULL, NULL );
+ goto error_return;
+ }
+#endif /* HAVE_TLS */
+
+ if ( *lcp == NULL ) {
+ *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
+ (*lcp)->lc_flags= li->li_flags;
+ }
+ (*lcp)->lc_ld = ld;
+ (*lcp)->lc_refcnt = 1;
+#ifdef HAVE_TLS
+ if ( is_tls ) {
+ LDAP_BACK_CONN_ISTLS_SET( *lcp );
+ } else {
+ LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
+ }
+#endif /* HAVE_TLS */
+
+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";
}
- if (op->o_conn) send_ldap_result( op, rs );
+ send_ldap_result( op, rs );
rs->sr_text = 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,
- (const void *)&vers);
- /* FIXME: configurable? */
- ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON);
+ }
- lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
- lc->conn = lc_curr.conn;
- lc->ld = ld;
- ber_dupbv( &lc->local_dn, &lc_curr.local_dn );
+ return rs->sr_err;
+}
-#ifdef ENABLE_REWRITE
- /*
- * Sets a cookie for the rewrite session
- *
- * FIXME: the o_conn might be no longer valid,
- * since we may have different entries
- * for the same connection
- */
- ( void )rewrite_session_init( li->rwmap.rwm_rw, op->o_conn );
-#endif /* ENABLE_REWRITE */
+ldapconn_t *
+ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ ldapconn_t *lc,
+ lc_curr = { 0 };
+ int refcnt = 1;
- ldap_pvt_thread_mutex_init( &lc->lc_mutex );
+ /* Internal searches are privileged and shared. So is root. */
+ if ( op->o_do_not_cache || be_isroot( op ) ) {
+ LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
+ lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
+ lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
- if ( is_priv ) {
- ber_dupbv( &lc->cred, &li->bindpw );
- ber_dupbv( &lc->bound_dn, &li->binddn );
+ } else {
+ lc_curr.lc_local_ndn = op->o_ndn;
+ /* Explicit binds must not be shared */
+ if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
+ lc_curr.lc_conn = op->o_conn;
+
} else {
- lc->cred.bv_len = 0;
- lc->cred.bv_val = NULL;
- lc->bound_dn.bv_val = NULL;
- lc->bound_dn.bv_len = 0;
- if ( op->o_conn->c_dn.bv_len != 0
- && ( op->o_bd == op->o_conn->c_authz_backend ) ) {
-
- dncookie dc;
- struct berval bv;
-
- /*
- * Rewrite the bind dn if needed
- */
- dc.rwmap = &li->rwmap;
-#ifdef ENABLE_REWRITE
- dc.conn = op->o_conn;
- dc.rs = rs;
- dc.ctx = "bindDn";
-#else
- dc.tofrom = 1;
- dc.normalized = 0;
+ lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
+ }
+ }
+
+ /* Searches for a ldapconn in the avl tree */
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+ lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
+ (caddr_t)&lc_curr, ldap_back_conn_cmp );
+ if ( lc != NULL ) {
+ refcnt = ++lc->lc_refcnt;
+ }
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ /* Looks like we didn't get a bind. Open a new session... */
+ if ( lc == 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 );
+
+ if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
+ ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
+ ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
+ LDAP_BACK_CONN_ISPRIV_SET( lc );
+
+ } else {
+ BER_BVZERO( &lc->lc_cred );
+ BER_BVZERO( &lc->lc_bound_ndn );
+#if 0
+ /* FIXME: if we set lc_bound_ndn = o_ndn
+ * we end up with a bind with DN but no password! */
+ if ( !BER_BVISEMPTY( &op->o_ndn )
+ && SLAP_IS_AUTHZ_BACKEND( op ) )
+ {
+ ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
+ }
#endif
+ }
- if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn, &bv ) ) {
- if (op->o_conn) send_ldap_result( op, rs );
- return NULL;
- }
+#ifdef HAVE_TLS
+ /* if start TLS failed but it was not mandatory,
+ * check if the non-TLS connection was already
+ * in cache; in case, destroy the newly created
+ * connection and use the existing one */
+ if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
+ && !ldap_tls_inplace( lc->lc_ld ) )
+ {
+ ldapconn_t *tmplc;
+
+ lc_curr.lc_conn = LDAP_BACK_PCONN;
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
+ (caddr_t)&lc_curr, ldap_back_conn_cmp );
+ if ( tmplc != NULL ) {
+ refcnt = ++tmplc->lc_refcnt;
+ ldap_back_conn_free( lc );
+ lc = tmplc;
+ }
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
- if ( bv.bv_val == op->o_conn->c_dn.bv_val ) {
- ber_dupbv( &lc->bound_dn, &bv );
- } else {
- lc->bound_dn = bv;
- }
+ if ( tmplc != NULL ) {
+ goto done;
}
}
+#endif /* HAVE_TLS */
- lc->bound = 0;
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
/* Inserts the newly created ldapconn in the avl tree */
- ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+ assert( lc->lc_refcnt == 1 );
+ rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
ldap_back_conn_cmp, ldap_back_conn_dup );
#if PRINT_CONNTREE > 0
- myprint( li->conntree );
+ myprint( li->li_conninfo.lai_tree );
#endif /* PRINT_CONNTREE */
- ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG( BACK_LDAP, INFO,
- "ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0);
-#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_TRACE,
- "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
-#endif /* !NEW_LOGGING */
+ "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
+ (void *)lc, refcnt, 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) {
+ rs->sr_err = LDAP_OTHER;
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
send_ldap_error( op, rs, LDAP_OTHER,
- "internal server error" );
+ "internal server error" );
}
- return( NULL );
+ return NULL;
}
+
} else {
-#ifdef NEW_LOGGING
- LDAP_LOG( BACK_LDAP, INFO,
- "ldap_back_getconn: conn %p fetched\n",
- (void *) lc, 0, 0 );
-#else /* !NEW_LOGGING */
- Debug( LDAP_DEBUG_TRACE,
- "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
-#endif /* !NEW_LOGGING */
+ if ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout ) {
+ /* in case of failure, it frees/taints lc and sets it to NULL */
+ if ( ldap_back_retry( &lc, op, rs, sendok ) ) {
+ lc = NULL;
+ }
+ }
+
+ if ( lc ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
+ (void *)lc, refcnt, 0 );
+ }
}
-
- return( lc );
+
+ if ( li->li_idle_timeout && lc ) {
+ lc->lc_time = op->o_time;
+ }
+
+done:;
+ return lc;
+}
+
+void
+ldap_back_release_conn(
+ Operation *op,
+ SlapReply *rs,
+ ldapconn_t *lc )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ assert( lc->lc_refcnt > 0 );
+ lc->lc_refcnt--;
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
}
/*
* ldap_back_dobind
*
- * Note: as the check for the value of lc->bound was already here, I removed
+ * 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.
+ *
+ * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
*/
-int
-ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs )
+static int
+ldap_back_dobind_int(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ int retries,
+ int dolock )
{
- int rc;
- ber_int_t msgid;
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ int rc = LDAP_BACK_CONN_ISBOUND( lc );
+ ber_int_t msgid;
+
+ assert( retries >= 0 );
+
+ if ( rc ) {
+ return 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 "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 &&
+ ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
+ ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
+ {
+ (void)ldap_back_proxy_authz_bind( lc, op, rs );
+ goto done;
+ }
+
+#ifdef HAVE_CYRUS_SASL
+ if ( LDAP_BACK_CONN_ISPRIV( lc )
+ && li->li_acl_authmethod == LDAP_AUTH_SASL )
+ {
+ void *defaults = NULL;
- ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
- if ( !lc->bound ) {
- rs->sr_err = ldap_sasl_bind(lc->ld, lc->bound_dn.bv_val,
- LDAP_SASL_SIMPLE, &lc->cred, NULL, NULL, &msgid);
- rc = ldap_back_op_result( lc, op, rs, msgid, 0 );
- if (rc == LDAP_SUCCESS) {
- lc->bound = 1;
+ if ( li->li_acl_secprops != NULL ) {
+ rc = ldap_set_option( lc->lc_ld,
+ LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
+
+ if ( rc != LDAP_OPT_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
+ "(%s,SECPROPS,\"%s\") failed!\n",
+ li->li_uri, li->li_acl_secprops, 0 );
+ goto done;
+ }
+ }
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ li->li_acl_sasl_mech.bv_val,
+ li->li_acl_sasl_realm.bv_val,
+ li->li_acl_authcID.bv_val,
+ li->li_acl_passwd.bv_val,
+ NULL );
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
+ li->li_acl_authcDN.bv_val,
+ li->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 ) {
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ send_ldap_result( op, rs );
+
+ } else {
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ }
+ 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 != LDAP_BACK_RETRY_NEVER ) {
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ }
+
+ assert( lc->lc_refcnt > 0 );
+ if ( lc->lc_refcnt == 1 ) {
+ ldap_unbind_ext( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
+
+ /* lc here must be the regular lc, reset and ready for init */
+ rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
+ }
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ if ( retries > 0 ) {
+ retries--;
+ }
+ goto retry;
+ }
}
+
+ ldap_back_freeconn( op, lc, dolock );
+ rs->sr_err = slap_map_api2result( rs );
+
+ return 0;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
+ if ( rc == LDAP_SUCCESS ) {
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+
+ } else {
+ ldap_back_release_conn( op, rs, lc );
}
- rc = lc->bound;
- ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
+
+done:;
+ rc = LDAP_BACK_CONN_ISBOUND( lc );
+
return rc;
}
+int
+ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
+}
+
/*
- * ldap_back_rebind
+ * ldap_back_default_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,
+ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
ber_int_t msgid, void *params )
{
- struct ldapconn *lc = params;
+ ldapconn_t *lc = (ldapconn_t *)params;
- return ldap_bind_s( ld, lc->bound_dn.bv_val, lc->cred.bv_val, LDAP_AUTH_SIMPLE );
-}
+#ifdef HAVE_TLS
+ /* ... otherwise we couldn't get here */
+ assert( lc != NULL );
-/* Map API errors to protocol errors... */
+ if ( !ldap_tls_inplace( ld ) ) {
+ int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
+ rc;
+ const char *text = NULL;
-int
-ldap_back_map_result(SlapReply *rs)
-{
- switch(rs->sr_err)
- {
- case LDAP_SERVER_DOWN:
- return LDAP_UNAVAILABLE;
- case LDAP_LOCAL_ERROR:
- return LDAP_OTHER;
- 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:
- rs->sr_text = "Filter error";
- return LDAP_OTHER;
- case LDAP_USER_CANCELLED:
- rs->sr_text = "User cancelled";
- return LDAP_OTHER;
- case LDAP_PARAM_ERROR:
- return LDAP_PROTOCOL_ERROR;
- case LDAP_NO_MEMORY:
- return LDAP_OTHER;
- 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:
- rs->sr_text = "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(rs->sr_err)
- return LDAP_OTHER;
- else
- return rs->sr_err;
+ rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
+ LDAP_BACK_RETRY_DEFAULT, &text );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
}
+#endif /* HAVE_TLS */
+
+ /* 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_op_result(struct ldapconn *lc, Operation *op, SlapReply *rs,
- ber_int_t msgid, int sendok)
+ldap_back_op_result(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ ber_int_t msgid,
+ time_t timeout,
+ ldap_back_send_t sendok )
{
- struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
- char *match = NULL;
- LDAPMessage *res;
- char *text = NULL;
+ 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 (rs->sr_err == LDAP_SUCCESS) {
- if (ldap_result(lc->ld, msgid, 1, NULL, &res) == -1) {
- ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER,
- &rs->sr_err);
+ /* 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;
+
+ if ( timeout ) {
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
} else {
- int rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
- &match, &text, NULL, NULL, 1);
+ LDAP_BACK_TV_SET( &tv );
+ }
+
+retry:;
+ /* if result parsing fails, note the failure reason */
+ rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ switch ( rc ) {
+ case 0:
+ if ( timeout ) {
+ (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
+ rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
+ LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
+ rs->sr_text = "Operation timed out";
+ break;
+ }
+
+ LDAP_BACK_TV_SET( &tv );
+ 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 );
+#ifndef LDAP_NULL_IS_NULL
+ if ( match != NULL && match[ 0 ] == '\0' ) {
+ ldap_memfree( match );
+ match = NULL;
+ }
+ if ( text != NULL && text[ 0 ] == '\0' ) {
+ ldap_memfree( text );
+ text = NULL;
+ }
+#endif /* LDAP_NULL_IS_NULL */
rs->sr_text = text;
- if (rc != LDAP_SUCCESS) rs->sr_err = rc;
+ if ( rc != LDAP_SUCCESS ) {
+ rs->sr_err = rc;
+ }
}
}
- if (rs->sr_err != LDAP_SUCCESS) {
- rs->sr_err = ldap_back_map_result(rs);
+ /* 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 must not reply to client */
+ /* internal ops ( op->o_conn == NULL )
+ * must not reply to client */
if ( op->o_conn && !op->o_do_not_cache && match ) {
- struct berval dn, mdn;
- dncookie dc;
-
- dc.rwmap = &li->rwmap;
-#ifdef ENABLE_REWRITE
- dc.conn = op->o_conn;
- dc.rs = rs;
- dc.ctx = "matchedDn";
-#else
- dc.tofrom = 0;
- dc.normalized = 0;
-#endif
- ber_str2bv(match, 0, 0, &dn);
- ldap_back_dn_massage(&dc, &dn, &mdn);
- rs->sr_matched = mdn.bv_val;
-
+
+ /* record the (massaged) matched
+ * DN into the reply structure */
+ rs->sr_matched = match;
}
}
- if (op->o_conn && (sendok || rs->sr_err != LDAP_SUCCESS)) {
+ if ( op->o_conn &&
+ ( ( sendok & LDAP_BACK_SENDOK )
+ || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
+ {
send_ldap_result( op, rs );
}
if ( match ) {
ldap_memfree( text );
}
rs->sr_text = NULL;
- return( (rs->sr_err == LDAP_SUCCESS) ? 0 : -1 );
+ return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
+}
+
+/* return true if bound, false if failed */
+int
+ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ int rc = 0;
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ assert( lcp != NULL );
+ assert( *lcp != NULL );
+
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+ if ( (*lcp)->lc_refcnt == 1 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
+ op->o_log_prefix, li->li_uri,
+ BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
+ "" : (*lcp)->lc_bound_ndn.bv_val );
+
+ ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
+ (*lcp)->lc_ld = NULL;
+ LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
+
+ /* lc here must be the regular lc, reset and ready for init */
+ rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
+ if ( rc != LDAP_SUCCESS ) {
+ rc = 0;
+ *lcp = NULL;
+
+ } else {
+ rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
+ if ( rc == 0 ) {
+ *lcp = NULL;
+ }
+ }
+ }
+
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ return rc;
}
+static int
+ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ struct berval binddn = slap_empty_bv;
+ struct berval bindcred = slap_empty_bv;
+ struct berval ndn;
+ int dobind = 0;
+ int msgid;
+ int rc;
+
+ if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ ndn = op->o_conn->c_ndn;
+
+ } else {
+ ndn = op->o_ndn;
+ }
+
+ /*
+ * 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->li_idassert_mode ) {
+ case LDAP_BACK_IDASSERT_LEGACY:
+ if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
+ if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
+ {
+ binddn = li->li_idassert_authcDN;
+ bindcred = li->li_idassert_passwd;
+ dobind = 1;
+ }
+ }
+ break;
+
+ default:
+ /* NOTE: rootdn can always idassert */
+ if ( li->li_idassert_authz && !be_isroot( op ) ) {
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &ndn ) ) {
+ authcDN = slap_empty_bv;
+
+ } else {
+ authcDN = ndn;
+ }
+ rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
+ &authcDN, &authcDN );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
+ send_ldap_result( op, rs );
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+
+ } else {
+ rs->sr_err = LDAP_SUCCESS;
+ binddn = slap_empty_bv;
+ bindcred = slap_empty_bv;
+ break;
+ }
+
+ goto done;
+ }
+ }
+
+ binddn = li->li_idassert_authcDN;
+ bindcred = li->li_idassert_passwd;
+ dobind = 1;
+ break;
+ }
+
+ if ( dobind && li->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->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
+ {
+ switch ( li->li_idassert_mode ) {
+ case LDAP_BACK_IDASSERT_OTHERID:
+ case LDAP_BACK_IDASSERT_OTHERDN:
+ authzID = li->li_idassert_authzID;
+ break;
+
+ case LDAP_BACK_IDASSERT_ANONYMOUS:
+ BER_BVSTR( &authzID, "dn:" );
+ break;
+
+ case LDAP_BACK_IDASSERT_SELF:
+ if ( BER_BVISNULL( &ndn ) ) {
+ /* connection is not authc'd, so don't idassert */
+ BER_BVSTR( &authzID, "dn:" );
+ break;
+ }
+ authzID.bv_len = STRLENOF( "dn:" ) + 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:" ),
+ ndn.bv_val, ndn.bv_len + 1 );
+ freeauthz = 1;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if ( li->li_idassert_secprops != NULL ) {
+ rs->sr_err = ldap_set_option( lc->lc_ld,
+ LDAP_OPT_X_SASL_SECPROPS,
+ (void *)li->li_idassert_secprops );
+
+ if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
+ send_ldap_result( op, rs );
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ goto done;
+ }
+ }
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ li->li_idassert_sasl_mech.bv_val,
+ li->li_idassert_sasl_realm.bv_val,
+ li->li_idassert_authcID.bv_val,
+ li->li_idassert_passwd.bv_val,
+ authzID.bv_val );
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
+ li->li_idassert_sasl_mech.bv_val, NULL, NULL,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
+ defaults );
+
+ rs->sr_err = slap_map_api2result( rs );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ send_ldap_result( op, rs );
+
+ } else {
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ }
+
+ lutil_sasl_freedefs( defaults );
+ if ( freeauthz ) {
+ slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
+ }
+
+ goto done;
+#endif /* HAVE_CYRUS_SASL */
+ }
+
+ switch ( li->li_idassert_authmethod ) {
+ case LDAP_AUTH_NONE:
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ goto done;
+
+ case LDAP_AUTH_SIMPLE:
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld,
+ binddn.bv_val, LDAP_SASL_SIMPLE,
+ &bindcred, NULL, NULL, &msgid );
+ break;
+
+ default:
+ /* unsupported! */
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ send_ldap_result( op, rs );
+ goto done;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
+ if ( rc == LDAP_SUCCESS ) {
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ }
+done:;
+ return LDAP_BACK_CONN_ISBOUND( lc );
+}
+
+/*
+ * 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(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ LDAPControl ***pctrls )
+{
+ ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
+ LDAPControl **ctrls = NULL;
+ int i = 0,
+ mode;
+ struct berval assertedID,
+ ndn;
+
+ *pctrls = NULL;
+
+ rs->sr_err = LDAP_SUCCESS;
+
+ /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
+ * but if it is not set this test fails. We need a different
+ * means to detect if idassert is enabled */
+ if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
+ && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
+ {
+ goto done;
+ }
+
+ if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
+ goto done;
+ }
+
+ if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ ndn = op->o_conn->c_ndn;
+
+ } else {
+ ndn = op->o_ndn;
+ }
+
+ if ( li->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( &ndn ) ) {
+ goto done;
+ }
+
+ if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
+ goto done;
+ }
+
+ } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
+ if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
+ /* && ( !BER_BVISNULL( &ndn )
+ || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
+ {
+ /* 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 ndn is NULL */
+ goto done;
+ }
+
+ } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
+ int rc;
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &ndn ) ) {
+ authcDN = slap_empty_bv;
+ } else {
+ authcDN = ndn;
+ }
+ rc = slap_sasl_matches( op, li->li_idassert_authz,
+ &authcDN, & authcDN );
+ if ( rc != LDAP_SUCCESS ) {
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
+ {
+ /* ndn is not authorized
+ * to use idassert */
+ return rc;
+ }
+ return rs->sr_err;
+ }
+ }
+
+ 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_is_auth_check ) {
+ mode = LDAP_BACK_IDASSERT_NOASSERT;
+
+ } else {
+ mode = li->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( &ndn ) ) {
+ assertedID = slap_empty_bv;
+ } else {
+ assertedID = 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->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->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_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
+{
+ 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 ] != NULL );
+
+ 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