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-rw-r--r--servers/slapd/back-ldap/bind.c3068
1 files changed, 3068 insertions, 0 deletions
diff --git a/servers/slapd/back-ldap/bind.c b/servers/slapd/back-ldap/bind.c
new file mode 100644
index 0000000..91c62cd
--- /dev/null
+++ b/servers/slapd/back-ldap/bind.c
@@ -0,0 +1,3068 @@
+/* bind.c - ldap backend bind function */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2021 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>.
+ */
+/* 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.h"
+#include "lutil_ldap.h"
+
+#define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ "2.16.840.1.113730.3.4.12"
+
+#ifdef LDAP_DEVEL
+#define SLAP_AUTH_DN 1
+#endif
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+
+static const struct {
+ slap_mask_t f;
+ char c;
+} flagsmap[] = {
+ { LDAP_BACK_FCONN_ISBOUND, 'B' },
+ { LDAP_BACK_FCONN_ISANON, 'A' },
+ { LDAP_BACK_FCONN_ISPRIV, 'P' },
+ { LDAP_BACK_FCONN_ISTLS, 'T' },
+ { LDAP_BACK_FCONN_BINDING, 'X' },
+ { LDAP_BACK_FCONN_TAINTED, 'E' },
+ { LDAP_BACK_FCONN_ABANDON, 'N' },
+ { LDAP_BACK_FCONN_ISIDASR, 'S' },
+ { LDAP_BACK_FCONN_CACHED, 'C' },
+ { 0, '\0' }
+};
+
+static void
+ldap_back_conn_print( ldapconn_t *lc, const char *avlstr )
+{
+ char buf[ SLAP_TEXT_BUFLEN ];
+ char fbuf[ sizeof("BAPTIENSC") ];
+ int i;
+
+ ldap_back_conn2str( &lc->lc_base, buf, sizeof( buf ) );
+ for ( i = 0; flagsmap[ i ].c != '\0'; i++ ) {
+ if ( lc->lc_lcflags & flagsmap[i].f ) {
+ fbuf[i] = flagsmap[i].c;
+
+ } else {
+ fbuf[i] = '.';
+ }
+ }
+ fbuf[i] = '\0';
+
+ fprintf( stderr, "lc=%p %s %s flags=0x%08x (%s)\n",
+ (void *)lc, buf, avlstr, lc->lc_lcflags, fbuf );
+}
+
+static void
+ldap_back_ravl_print( Avlnode *root, int depth )
+{
+ int i;
+ ldapconn_t *lc;
+
+ if ( root == 0 ) {
+ return;
+ }
+
+ ldap_back_ravl_print( root->avl_right, depth+1 );
+
+ for ( i = 0; i < depth; i++ ) {
+ fprintf( stderr, "-" );
+ }
+
+ lc = root->avl_data;
+ ldap_back_conn_print( lc, avl_bf2str( root->avl_bf ) );
+
+ ldap_back_ravl_print( root->avl_left, depth + 1 );
+}
+
+static char* priv2str[] = {
+ "privileged",
+ "privileged/TLS",
+ "anonymous",
+ "anonymous/TLS",
+ "bind",
+ "bind/TLS",
+ NULL
+};
+
+void
+ldap_back_print_conntree( ldapinfo_t *li, char *msg )
+{
+ int c;
+
+ fprintf( stderr, "========> %s\n", msg );
+
+ for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
+ int i = 0;
+ ldapconn_t *lc;
+
+ fprintf( stderr, " %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num );
+
+ LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q )
+ {
+ fprintf( stderr, " [%d] ", i );
+ ldap_back_conn_print( lc, "" );
+ i++;
+ }
+ }
+
+ if ( li->li_conninfo.lai_tree == 0 ) {
+ fprintf( stderr, "\t(empty)\n" );
+
+ } else {
+ ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 );
+ }
+
+ fprintf( stderr, "<======== %s\n", msg );
+}
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+static int
+ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock );
+
+static ldapconn_t *
+ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
+ struct berval *binddn, struct berval *bindcred );
+
+static int
+ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
+ struct berval *binddn, struct berval *bindcred );
+
+static int
+ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs,
+ ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred );
+
+static int
+ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs,
+ ldap_back_send_t sendok );
+
+static int
+ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
+
+ldapconn_t *
+ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc )
+{
+ if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
+ if ( LDAP_BACK_CONN_CACHED( lc ) ) {
+ assert( lc->lc_q.tqe_prev != NULL );
+ assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 );
+ li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--;
+ LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
+ LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
+ LDAP_BACK_CONN_CACHED_CLEAR( lc );
+
+ } else {
+ assert( LDAP_BACK_CONN_TAINTED( lc ) );
+ assert( lc->lc_q.tqe_prev == NULL );
+ }
+
+ } else {
+ ldapconn_t *tmplc = NULL;
+
+ if ( LDAP_BACK_CONN_CACHED( lc ) ) {
+ assert( !LDAP_BACK_CONN_TAINTED( lc ) );
+ tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
+ ldap_back_conndnlc_cmp );
+ assert( tmplc == lc );
+ LDAP_BACK_CONN_CACHED_CLEAR( lc );
+ }
+
+ assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
+ }
+
+ return lc;
+}
+
+int
+ldap_back_bind( Operation *op, SlapReply *rs )
+{
+ ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
+ ldapconn_t *lc;
+
+ LDAPControl **ctrls = NULL;
+ struct berval save_o_dn;
+ int save_o_do_not_cache,
+ rc = 0;
+ ber_int_t msgid;
+ ldap_back_send_t retrying = LDAP_BACK_RETRYING;
+
+ /* allow rootdn as a means to auth without the need to actually
+ * contact the proxied DSA */
+ switch ( be_rootdn_bind( op, rs ) ) {
+ case SLAP_CB_CONTINUE:
+ break;
+
+ default:
+ return rs->sr_err;
+ }
+
+ lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL );
+ if ( !lc ) {
+ return rs->sr_err;
+ }
+
+ /* we can do (almost) whatever we want with this conn,
+ * because either it's temporary, or it's marked as binding */
+ if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
+ ch_free( lc->lc_bound_ndn.bv_val );
+ BER_BVZERO( &lc->lc_bound_ndn );
+ }
+ 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_BVZERO( &lc->lc_cred );
+ }
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+
+ /* don't add proxyAuthz; set the bindDN */
+ save_o_dn = op->o_dn;
+ save_o_do_not_cache = op->o_do_not_cache;
+ op->o_dn = op->o_req_dn;
+ op->o_do_not_cache = 1;
+
+ ctrls = op->o_ctrls;
+ rc = ldap_back_controls_add( op, rs, lc, &ctrls );
+ op->o_dn = save_o_dn;
+ op->o_do_not_cache = save_o_do_not_cache;
+ if ( rc != LDAP_SUCCESS ) {
+ send_ldap_result( op, rs );
+ ldap_back_release_conn( li, lc );
+ return( rc );
+ }
+
+retry:;
+ /* 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, ctrls, NULL, &msgid );
+ /* FIXME: should we always retry, or only when piping the bind
+ * in the "override" connection pool? */
+ rc = ldap_back_op_result( lc, op, rs, msgid,
+ li->li_timeout[ SLAP_OP_BIND ],
+ LDAP_BACK_BIND_SERR | retrying );
+ if ( rc == LDAP_UNAVAILABLE && retrying ) {
+ retrying &= ~LDAP_BACK_RETRYING;
+ if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) {
+ goto retry;
+ }
+ if ( !lc )
+ return( rc );
+ }
+
+ ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+ ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
+ ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+ ldap_back_controls_free( op, rs, &ctrls );
+
+ if ( rc == LDAP_SUCCESS ) {
+ op->o_conn->c_authz_cookie = op->o_bd->be_private;
+
+ /* If defined, proxyAuthz will be used also when
+ * back-ldap is the authorizing backend; for this
+ * purpose, after a successful bind the connection
+ * is left for further binds, and further operations
+ * on this client connection will use a default
+ * connection with identity assertion */
+ /* NOTE: use with care */
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
+ ldap_back_release_conn( li, lc );
+ return( rc );
+ }
+
+ /* rebind is now done inside ldap_back_proxy_authz_bind()
+ * in case of success */
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
+
+ if ( !BER_BVISNULL( &lc->lc_cred ) ) {
+ memset( lc->lc_cred.bv_val, 0,
+ lc->lc_cred.bv_len );
+ }
+
+ if ( LDAP_BACK_SAVECRED( li ) ) {
+ ber_bvreplace( &lc->lc_cred, &op->orb_cred );
+ ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
+
+ } else {
+ lc->lc_cred.bv_len = 0;
+ }
+ }
+
+ /* must re-insert if local DN changed as result of bind */
+ if ( !LDAP_BACK_CONN_ISBOUND( lc )
+ || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn )
+ && !LDAP_BACK_PCONN_ISPRIV( lc ) ) )
+ {
+ int lerr = -1;
+ ldapconn_t *tmplc;
+
+ /* 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;
+ }
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, ">>> ldap_back_bind" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ assert( lc->lc_refcnt == 1 );
+ ldap_back_conn_delete( li, lc );
+
+ /* delete all cached connections with the current connection */
+ if ( LDAP_BACK_SINGLECONN( li ) ) {
+ while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
+ {
+ assert( !LDAP_BACK_PCONN_ISPRIV( lc ) );
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_bind: destroying conn %lu (refcnt=%u)\n",
+ lc->lc_conn->c_connid, lc->lc_refcnt, 0 );
+
+ if ( tmplc->lc_refcnt != 0 ) {
+ /* taint it */
+ LDAP_BACK_CONN_TAINTED_SET( tmplc );
+ LDAP_BACK_CONN_CACHED_CLEAR( tmplc );
+
+ } else {
+ /*
+ * Needs a test because the handler may be corrupted,
+ * and calling ldap_unbind on a corrupted header results
+ * in a segmentation fault
+ */
+ ldap_back_conn_free( tmplc );
+ }
+ }
+ }
+
+ if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
+ ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
+ if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
+ LDAP_BACK_PCONN_ROOTDN_SET( lc, op );
+ }
+ lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
+ ldap_back_conndn_cmp, ldap_back_conndn_dup );
+ }
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, "<<< ldap_back_bind" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ switch ( lerr ) {
+ case 0:
+ LDAP_BACK_CONN_CACHED_SET( lc );
+ break;
+
+ case -1:
+ /* duplicate; someone else successfully bound
+ * on the same connection with the same identity;
+ * we can do this because lc_refcnt == 1 */
+ ldap_back_conn_free( lc );
+ lc = NULL;
+ }
+ }
+
+ if ( lc != NULL ) {
+ ldap_back_release_conn( li, lc );
+ }
+
+ return( rc );
+}
+
+/*
+ * ldap_back_conndn_cmp
+ *
+ * compares two ldapconn_t based on the value of the conn pointer
+ * and of the local DN; used by avl stuff for insert, lookup
+ * and direct delete
+ */
+int
+ldap_back_conndn_cmp( const void *c1, const void *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 */
+ /* For shared sessions, conn is NULL. Only explicitly
+ * bound sessions will have non-NULL conn.
+ */
+ rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
+ if ( rc == 0 ) {
+ rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
+ }
+
+ return rc;
+}
+
+/*
+ * ldap_back_conndnlc_cmp
+ *
+ * compares two ldapconn_t based on the value of the conn pointer,
+ * the local DN and the lc pointer; used by avl stuff for insert, lookup
+ * and direct delete
+ */
+static int
+ldap_back_conndnlc_cmp( const void *c1, const void *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 */
+ /* For shared sessions, conn is NULL. Only explicitly
+ * bound sessions will have non-NULL conn.
+ */
+ rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
+ if ( rc == 0 ) {
+ rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
+ if ( rc == 0 ) {
+ rc = SLAP_PTRCMP( lc1, lc2 );
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * ldap_back_conn_cmp
+ *
+ * compares two ldapconn_t based on the value of the conn pointer;
+ * used by avl stuff for delete of all conns with the same connid
+ */
+int
+ldap_back_conn_cmp( const void *c1, const void *c2 )
+{
+ const ldapconn_t *lc1 = (const ldapconn_t *)c1;
+ const ldapconn_t *lc2 = (const ldapconn_t *)c2;
+
+ /* 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_conndn_dup
+ *
+ * returns -1 in case a duplicate ldapconn_t has been inserted;
+ * used by avl stuff
+ */
+int
+ldap_back_conndn_dup( void *c1, void *c2 )
+{
+ ldapconn_t *lc1 = (ldapconn_t *)c1;
+ ldapconn_t *lc2 = (ldapconn_t *)c2;
+
+ /* Cannot have more than one shared session with same DN */
+ if ( lc1->lc_conn == lc2->lc_conn &&
+ dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock )
+{
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ }
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, ">>> ldap_back_freeconn" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ (void)ldap_back_conn_delete( li, lc );
+
+ if ( lc->lc_refcnt == 0 ) {
+ ldap_back_conn_free( (void *)lc );
+ }
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, "<<< ldap_back_freeconn" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ 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 timeout,
+ const char **text )
+{
+ int rc = LDAP_SUCCESS;
+
+ /* start TLS ("tls-[try-]{start,propagate}" statements) */
+ if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) )
+ && !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 ) {
+ /* we should rather bail out... */
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ *text = "invalid protocol version";
+ }
+
+ if ( rc == LDAP_SUCCESS ) {
+ rc = ldap_start_tls( ld, NULL, NULL, &msgid );
+ }
+
+ if ( rc == LDAP_SUCCESS ) {
+ LDAPMessage *res = NULL;
+ struct timeval tv;
+
+ if ( timeout ) {
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+ } else {
+ LDAP_BACK_TV_SET( &tv );
+ }
+ rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ if ( rc <= 0 ) {
+ 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 ) {
+ SlapReply rs;
+ rc = ldap_parse_result( ld, res, &rs.sr_err,
+ NULL, NULL, NULL, NULL, 1 );
+ if ( rc != LDAP_SUCCESS ) {
+ rs.sr_err = rc;
+ }
+ rc = slap_map_api2result( &rs );
+ 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_F( flags ) ) {
+ *text = "could not start TLS";
+ break;
+ }
+
+ /* in case Start TLS is not critical */
+ *is_tls = 0;
+ rc = LDAP_SUCCESS;
+ break;
+ }
+
+ } else {
+ *is_tls = 0;
+ }
+
+ return rc;
+}
+#endif /* HAVE_TLS */
+
+static int
+ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ int version;
+ LDAP *ld = NULL;
+#ifdef HAVE_TLS
+ int is_tls = op->o_conn->c_is_tls;
+ int flags = li->li_flags;
+ time_t lctime = (time_t)(-1);
+ slap_bindconf *sb;
+#endif /* HAVE_TLS */
+
+ ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
+ rs->sr_err = ldap_initialize( &ld, li->li_uri );
+ ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto error_return;
+ }
+
+ if ( li->li_urllist_f ) {
+ ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
+ }
+
+ /* Set LDAP version. This will always succeed: If the client
+ * bound with a particular version, then so can we.
+ */
+ if ( li->li_version != 0 ) {
+ version = li->li_version;
+
+ } else if ( op->o_protocol != 0 ) {
+ version = op->o_protocol;
+
+ } else {
+ /* assume it's an internal op; set to LDAPv3 */
+ version = LDAP_VERSION3;
+ }
+ ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
+
+ /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
+ ldap_set_option( ld, LDAP_OPT_REFERRALS,
+ LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
+
+ if ( li->li_network_timeout > 0 ) {
+ struct timeval tv;
+
+ tv.tv_sec = li->li_network_timeout;
+ tv.tv_usec = 0;
+ ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
+ }
+
+ /* turn on network keepalive, if configured so */
+ slap_client_keepalive(ld, &li->li_tls.sb_keepalive);
+
+#ifdef HAVE_TLS
+ if ( LDAP_BACK_CONN_ISPRIV( lc ) ) {
+ /* See "rationale" comment in ldap_back_getconn() */
+ if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
+ li->li_idassert_authmethod != LDAP_AUTH_NONE )
+ sb = &li->li_idassert.si_bc;
+ else
+ sb = &li->li_acl;
+
+ } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
+ sb = &li->li_idassert.si_bc;
+
+ } else {
+ sb = &li->li_tls;
+ }
+
+ if ( sb->sb_tls_do_init ) {
+ bindconf_tls_set( sb, ld );
+ } else if ( sb->sb_tls_ctx ) {
+ ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
+ }
+
+ /* if required by the bindconf configuration, force TLS */
+ if ( ( sb == &li->li_acl || sb == &li->li_idassert.si_bc ) &&
+ sb->sb_tls_ctx )
+ {
+ flags |= LDAP_BACK_F_USE_TLS;
+ }
+
+ ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
+ assert( li->li_uri_mutex_do_not_lock == 0 );
+ li->li_uri_mutex_do_not_lock = 1;
+ rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
+ li->li_uri, flags, li->li_timeout[ SLAP_OP_BIND ], &rs->sr_text );
+ li->li_uri_mutex_do_not_lock = 0;
+ ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ ldap_unbind_ext( ld, NULL, NULL );
+ rs->sr_text = "Start TLS failed";
+ goto error_return;
+
+ } else if ( li->li_idle_timeout ) {
+ /* only touch when activity actually took place... */
+ lctime = op->o_time;
+ }
+#endif /* HAVE_TLS */
+
+ lc->lc_ld = ld;
+ lc->lc_refcnt = 1;
+#ifdef HAVE_TLS
+ if ( is_tls ) {
+ LDAP_BACK_CONN_ISTLS_SET( lc );
+ } else {
+ LDAP_BACK_CONN_ISTLS_CLEAR( lc );
+ }
+ if ( lctime != (time_t)(-1) ) {
+ lc->lc_time = lctime;
+ }
+#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 = "Proxy connection initialization failed";
+ }
+ send_ldap_result( op, rs );
+ }
+
+ } else {
+ if ( li->li_conn_ttl > 0 ) {
+ lc->lc_create_time = op->o_time;
+ }
+ }
+
+ return rs->sr_err;
+}
+
+static ldapconn_t *
+ldap_back_getconn(
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ struct berval *binddn,
+ struct berval *bindcred )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ ldapconn_t *lc = NULL,
+ lc_curr = {{ 0 }};
+ int refcnt = 1,
+ lookupconn = !( sendok & LDAP_BACK_BINDING );
+
+ /* if the server is quarantined, and
+ * - the current interval did not expire yet, or
+ * - no more retries should occur,
+ * don't return the connection */
+ if ( li->li_isquarantined ) {
+ slap_retry_info_t *ri = &li->li_quarantine;
+ int dont_retry = 1;
+
+ if ( li->li_quarantine.ri_interval ) {
+ ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
+ if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
+ dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
+ || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
+ if ( !dont_retry ) {
+ Debug( LDAP_DEBUG_ANY,
+ "%s: ldap_back_getconn quarantine "
+ "retry block #%d try #%d.\n",
+ op->o_log_prefix, ri->ri_idx, ri->ri_count );
+ li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
+ }
+ }
+ ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
+ }
+
+ if ( dont_retry ) {
+ rs->sr_err = LDAP_UNAVAILABLE;
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
+ rs->sr_text = "Target is quarantined";
+ send_ldap_result( op, rs );
+ }
+ return NULL;
+ }
+ }
+
+ /* 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;
+ LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
+
+ } else {
+ struct berval tmpbinddn,
+ tmpbindcred,
+ save_o_dn,
+ save_o_ndn;
+ int isproxyauthz;
+
+ /* need cleanup */
+ if ( binddn == NULL ) {
+ binddn = &tmpbinddn;
+ }
+ if ( bindcred == NULL ) {
+ bindcred = &tmpbindcred;
+ }
+ if ( op->o_tag == LDAP_REQ_BIND ) {
+ save_o_dn = op->o_dn;
+ save_o_ndn = op->o_ndn;
+ op->o_dn = op->o_req_dn;
+ op->o_ndn = op->o_req_ndn;
+ }
+ isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
+ if ( op->o_tag == LDAP_REQ_BIND ) {
+ op->o_dn = save_o_dn;
+ op->o_ndn = save_o_ndn;
+ }
+ if ( isproxyauthz == -1 ) {
+ return NULL;
+ }
+
+ lc_curr.lc_local_ndn = op->o_ndn;
+ /* Explicit binds must not be shared;
+ * however, explicit binds are piped in a special connection
+ * when idassert is to occur with "override" set */
+ if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
+ lc_curr.lc_conn = op->o_conn;
+
+ } else {
+ if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
+ lc_curr.lc_local_ndn = *binddn;
+ LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
+ LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
+
+ } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
+ lc_curr.lc_local_ndn = slap_empty_bv;
+ LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
+ LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
+ lookupconn = 1;
+
+ } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
+ lc_curr.lc_conn = op->o_conn;
+
+ } else {
+ LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
+ }
+ }
+ }
+
+ /* Explicit Bind requests always get their own conn */
+ if ( lookupconn ) {
+retry_lock:
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
+ /* lookup a conn that's not binding */
+ LDAP_TAILQ_FOREACH( lc,
+ &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
+ lc_q )
+ {
+ if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
+ break;
+ }
+ }
+
+ if ( lc != NULL ) {
+ if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
+ lc_conn_priv_q ) )
+ {
+ LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
+ lc, lc_q );
+ LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
+ LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
+ lc, lc_q );
+ }
+
+ } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
+ && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
+ {
+ lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
+ }
+
+ } else {
+
+ /* Searches for a ldapconn in the avl tree */
+ lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
+ (caddr_t)&lc_curr, ldap_back_conndn_cmp );
+ }
+
+ if ( lc != NULL ) {
+ /* Don't reuse connections while they're still binding */
+ if ( LDAP_BACK_CONN_BINDING( lc ) ) {
+ if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ ldap_pvt_thread_yield();
+ goto retry_lock;
+ }
+ lc = NULL;
+ }
+
+ if ( lc != NULL ) {
+ if ( op->o_tag == LDAP_REQ_BIND ) {
+ /* right now, this is the only possible case */
+ assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
+ LDAP_BACK_CONN_BINDING_SET( lc );
+ }
+
+ 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 ) {
+ lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
+ lc->lc_flags = li->li_flags;
+ lc->lc_lcflags = lc_curr.lc_lcflags;
+ lc->lc_ldapinfo = li;
+ if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
+ ch_free( lc );
+ return NULL;
+ }
+
+ if ( sendok & LDAP_BACK_BINDING ) {
+ LDAP_BACK_CONN_BINDING_SET( lc );
+ }
+
+ lc->lc_conn = lc_curr.lc_conn;
+ ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
+
+ /*
+ * the rationale is: connections as the rootdn are privileged,
+ * so li_acl is to be used; however, in some cases
+ * one already configured identity assertion with a highly
+ * privileged idassert_authcDN, so if li_acl is not configured
+ * and idassert is, use idassert instead.
+ *
+ * might change in the future, because it's preferable
+ * to make clear what identity is being used, since
+ * the only drawback is that one risks to configure
+ * the same identity twice...
+ */
+ if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
+ if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
+ li->li_idassert_authmethod != LDAP_AUTH_NONE ) {
+ ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
+ ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
+
+ } else {
+ ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
+ ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
+ }
+ LDAP_BACK_CONN_ISPRIV_SET( lc );
+
+ } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
+ if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
+ ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
+ ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
+ }
+ LDAP_BACK_CONN_ISIDASSERT_SET( lc );
+
+ } else {
+ BER_BVZERO( &lc->lc_cred );
+ BER_BVZERO( &lc->lc_bound_ndn );
+ if ( !BER_BVISEMPTY( &op->o_ndn )
+ && SLAP_IS_AUTHZ_BACKEND( op ) )
+ {
+ ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
+ }
+ }
+
+#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 ( LDAP_BACK_PCONN_ISTLS( lc )
+ && !ldap_tls_inplace( lc->lc_ld ) )
+ {
+ ldapconn_t *tmplc = NULL;
+ int idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
+
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ LDAP_TAILQ_FOREACH( tmplc,
+ &li->li_conn_priv[ idx ].lic_priv,
+ lc_q )
+ {
+ if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
+ break;
+ }
+ }
+
+ 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 ( tmplc != NULL ) {
+ goto done;
+ }
+ }
+#endif /* HAVE_TLS */
+
+ /* Inserts the newly created ldapconn in the avl tree */
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ lc->lc_connid = li->li_conn_nextid++;
+
+ assert( lc->lc_refcnt == 1 );
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
+ if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
+ LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
+ li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
+ LDAP_BACK_CONN_CACHED_SET( lc );
+
+ } else {
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+ }
+ rs->sr_err = 0;
+
+ } else {
+ rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
+ ldap_back_conndn_cmp, ldap_back_conndn_dup );
+ LDAP_BACK_CONN_CACHED_SET( lc );
+ }
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ if ( LogTest( LDAP_DEBUG_TRACE ) ) {
+ char buf[ SLAP_TEXT_BUFLEN ];
+
+ snprintf( buf, sizeof( buf ),
+ "lc=%p inserted refcnt=%u rc=%d",
+ (void *)lc, refcnt, rs->sr_err );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_getconn: %s: %s\n",
+ op->o_log_prefix, buf, 0 );
+ }
+
+ if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
+ /* Err could be -1 in case a duplicate ldapconn is inserted */
+ switch ( rs->sr_err ) {
+ case 0:
+ break;
+
+ case -1:
+ LDAP_BACK_CONN_CACHED_CLEAR( lc );
+ if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
+ /* duplicate: free and try to get the newly created one */
+ ldap_back_conn_free( lc );
+ lc = NULL;
+ goto retry_lock;
+ }
+
+ /* taint connection, so that it'll be freed when released */
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+ break;
+
+ default:
+ LDAP_BACK_CONN_CACHED_CLEAR( lc );
+ ldap_back_conn_free( lc );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "Proxy bind collision";
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
+ send_ldap_result( op, rs );
+ }
+ return NULL;
+ }
+ }
+
+ } else {
+ int expiring = 0;
+
+ if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
+ || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
+ {
+ expiring = 1;
+
+ /* let it be used, but taint/delete it so that
+ * no-one else can look it up any further */
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ (void)ldap_back_conn_delete( li, lc );
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+
+ if ( LogTest( LDAP_DEBUG_TRACE ) ) {
+ char buf[ SLAP_TEXT_BUFLEN ];
+
+ snprintf( buf, sizeof( buf ),
+ "conn %p fetched refcnt=%u%s",
+ (void *)lc, refcnt,
+ expiring ? " expiring" : "" );
+ Debug( LDAP_DEBUG_TRACE,
+ "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
+ }
+ }
+
+#ifdef HAVE_TLS
+done:;
+#endif /* HAVE_TLS */
+
+ return lc;
+}
+
+void
+ldap_back_release_conn_lock(
+ ldapinfo_t *li,
+ ldapconn_t **lcp,
+ int dolock )
+{
+
+ ldapconn_t *lc = *lcp;
+
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ }
+ assert( lc->lc_refcnt > 0 );
+ LDAP_BACK_CONN_BINDING_CLEAR( lc );
+ lc->lc_refcnt--;
+ if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
+ ldap_back_freeconn( li, lc, 0 );
+ *lcp = NULL;
+ }
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+}
+
+void
+ldap_back_quarantine(
+ Operation *op,
+ SlapReply *rs )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ slap_retry_info_t *ri = &li->li_quarantine;
+
+ ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
+
+ if ( rs->sr_err == LDAP_UNAVAILABLE ) {
+ time_t new_last = slap_get_time();
+
+ switch ( li->li_isquarantined ) {
+ case LDAP_BACK_FQ_NO:
+ if ( ri->ri_last == new_last ) {
+ goto done;
+ }
+
+ Debug( LDAP_DEBUG_ANY,
+ "%s: ldap_back_quarantine enter.\n",
+ op->o_log_prefix, 0, 0 );
+
+ ri->ri_idx = 0;
+ ri->ri_count = 0;
+ break;
+
+ case LDAP_BACK_FQ_RETRYING:
+ Debug( LDAP_DEBUG_ANY,
+ "%s: ldap_back_quarantine block #%d try #%d failed.\n",
+ op->o_log_prefix, ri->ri_idx, ri->ri_count );
+
+ ++ri->ri_count;
+ if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
+ && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
+ {
+ ri->ri_count = 0;
+ ++ri->ri_idx;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ li->li_isquarantined = LDAP_BACK_FQ_YES;
+ ri->ri_last = new_last;
+
+ } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
+ if ( ri->ri_last == slap_get_time() ) {
+ goto done;
+ }
+
+ Debug( LDAP_DEBUG_ANY,
+ "%s: ldap_back_quarantine exit (%d) err=%d.\n",
+ op->o_log_prefix, li->li_isquarantined, rs->sr_err );
+
+ if ( li->li_quarantine_f ) {
+ (void)li->li_quarantine_f( li, li->li_quarantine_p );
+ }
+
+ ri->ri_count = 0;
+ ri->ri_idx = 0;
+ li->li_isquarantined = LDAP_BACK_FQ_NO;
+ }
+
+done:;
+ ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
+}
+
+static int
+ldap_back_dobind_cb(
+ Operation *op,
+ SlapReply *rs
+)
+{
+ ber_tag_t *tptr = op->o_callback->sc_private;
+ op->o_tag = *tptr;
+ rs->sr_tag = slap_req2res( op->o_tag );
+
+ return SLAP_CB_CONTINUE;
+}
+
+/*
+ * ldap_back_dobind_int
+ *
+ * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
+ */
+static int
+ldap_back_dobind_int(
+ ldapconn_t **lcp,
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ int retries,
+ int dolock )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ ldapconn_t *lc;
+ struct berval binddn = slap_empty_bv,
+ bindcred = slap_empty_bv;
+
+ int rc = 0,
+ isbound,
+ binding = 0;
+ ber_int_t msgid;
+ ber_tag_t o_tag = op->o_tag;
+ slap_callback cb = {0};
+ char *tmp_dn;
+
+ assert( lcp != NULL );
+ assert( retries >= 0 );
+
+ if ( sendok & LDAP_BACK_GETCONN ) {
+ assert( *lcp == NULL );
+
+ lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
+ if ( lc == NULL ) {
+ return 0;
+ }
+ *lcp = lc;
+
+ } else {
+ lc = *lcp;
+ }
+
+ assert( lc != NULL );
+
+retry_lock:;
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+ }
+
+ if ( binding == 0 ) {
+ /* check if already bound */
+ rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
+ if ( isbound ) {
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+ return rc;
+ }
+
+ if ( LDAP_BACK_CONN_BINDING( lc ) ) {
+ /* if someone else is about to bind it, give up and retry */
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+ ldap_pvt_thread_yield();
+ goto retry_lock;
+
+ } else {
+ /* otherwise this thread will bind it */
+ LDAP_BACK_CONN_BINDING_SET( lc );
+ binding = 1;
+ }
+ }
+
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+
+ /*
+ * 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 authorizing backend,
+ * but the "override" flag is given to idassert.
+ * It allows to use SASL bind and yet proxyAuthz users
+ */
+ op->o_tag = LDAP_REQ_BIND;
+ cb.sc_next = op->o_callback;
+ cb.sc_private = &o_tag;
+ cb.sc_response = ldap_back_dobind_cb;
+ op->o_callback = &cb;
+
+ if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
+ if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
+ /* if we got here, it shouldn't return result */
+ rc = ldap_back_is_proxy_authz( op, rs,
+ LDAP_BACK_DONTSEND, &binddn, &bindcred );
+ if ( rc != 1 ) {
+ Debug( LDAP_DEBUG_ANY, "Error: ldap_back_is_proxy_authz "
+ "returned %d, misconfigured URI?\n", rc, 0, 0 );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "misconfigured URI?";
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ goto done;
+ }
+ }
+ rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
+ goto done;
+ }
+
+#ifdef HAVE_CYRUS_SASL
+ if ( LDAP_BACK_CONN_ISPRIV( lc )) {
+ slap_bindconf *sb;
+ if ( li->li_acl_authmethod != LDAP_AUTH_NONE )
+ sb = &li->li_acl;
+ else
+ sb = &li->li_idassert.si_bc;
+
+ if ( sb->sb_method == LDAP_AUTH_SASL ) {
+ void *defaults = NULL;
+
+ if ( sb->sb_secprops != NULL ) {
+ rc = ldap_set_option( lc->lc_ld,
+ LDAP_OPT_X_SASL_SECPROPS, sb->sb_secprops );
+
+ if ( rc != LDAP_OPT_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
+ "(SECPROPS,\"%s\") failed!\n",
+ sb->sb_secprops, 0, 0 );
+ goto done;
+ }
+ }
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ sb->sb_saslmech.bv_val,
+ sb->sb_realm.bv_val,
+ sb->sb_authcId.bv_val,
+ sb->sb_cred.bv_val,
+ NULL );
+ if ( defaults == NULL ) {
+ rs->sr_err = LDAP_OTHER;
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ goto done;
+ }
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
+ sb->sb_binddn.bv_val,
+ sb->sb_saslmech.bv_val, NULL, NULL,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
+ defaults );
+
+ ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+ ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
+ ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+ lutil_sasl_freedefs( defaults );
+
+ switch ( rs->sr_err ) {
+ case LDAP_SUCCESS:
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ break;
+
+ case LDAP_LOCAL_ERROR:
+ /* list client API error codes that require
+ * to taint the connection */
+ /* FIXME: should actually retry? */
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+
+ /* fallthru */
+
+ default:
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ rs->sr_err = slap_map_api2result( rs );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ break;
+ }
+
+ if ( LDAP_BACK_QUARANTINE( li ) ) {
+ ldap_back_quarantine( op, rs );
+ }
+
+ goto done;
+ }
+ }
+#endif /* HAVE_CYRUS_SASL */
+
+retry:;
+ if ( BER_BVISNULL( &lc->lc_cred ) ) {
+ tmp_dn = "";
+ if ( !BER_BVISNULL( &lc->lc_bound_ndn ) && !BER_BVISEMPTY( &lc->lc_bound_ndn ) ) {
+ Debug( LDAP_DEBUG_ANY, "%s ldap_back_dobind_int: DN=\"%s\" without creds, binding anonymously",
+ op->o_log_prefix, lc->lc_bound_ndn.bv_val, 0 );
+ }
+
+ } else {
+ tmp_dn = lc->lc_bound_ndn.bv_val;
+ }
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld,
+ tmp_dn,
+ LDAP_SASL_SIMPLE, &lc->lc_cred,
+ NULL, NULL, &msgid );
+
+ ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+ ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
+ ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+ 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 ( rs->sr_err != LDAP_SUCCESS ) {
+ sendok &= ~LDAP_BACK_SENDERR;
+ lc->lc_refcnt = 0;
+ }
+ }
+
+ if ( dolock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+ }
+
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ if ( retries > 0 ) {
+ retries--;
+ }
+ goto retry;
+ }
+ }
+
+ assert( lc->lc_refcnt == 1 );
+ lc->lc_refcnt = 0;
+ ldap_back_freeconn( li, lc, dolock );
+ *lcp = NULL;
+ rs->sr_err = slap_map_api2result( rs );
+
+ if ( LDAP_BACK_QUARANTINE( li ) ) {
+ ldap_back_quarantine( op, rs );
+ }
+
+ if ( rs->sr_err != LDAP_SUCCESS &&
+ ( sendok & LDAP_BACK_SENDERR ) )
+ {
+ if ( op->o_callback == &cb )
+ op->o_callback = cb.sc_next;
+ op->o_tag = o_tag;
+ rs->sr_text = "Proxy can't contact remote server";
+ send_ldap_result( op, rs );
+ /* if we originally bound and wanted rebind-as-user, must drop
+ * the connection now because we just discarded the credentials.
+ * ITS#7464, #8142
+ */
+ if ( LDAP_BACK_SAVECRED( li ) && SLAP_IS_AUTHZ_BACKEND( op ) )
+ rs->sr_err = SLAPD_DISCONNECT;
+ }
+
+ rc = 0;
+ goto func_leave;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid,
+ -1, ( sendok | LDAP_BACK_BINDING ) );
+ if ( rc == LDAP_SUCCESS ) {
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ }
+
+done:;
+ LDAP_BACK_CONN_BINDING_CLEAR( lc );
+ rc = LDAP_BACK_CONN_ISBOUND( lc );
+ if ( !rc ) {
+ ldap_back_release_conn_lock( li, lcp, dolock );
+
+ } else if ( LDAP_BACK_SAVECRED( li ) ) {
+ ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
+ }
+
+func_leave:;
+ if ( op->o_callback == &cb )
+ op->o_callback = cb.sc_next;
+ op->o_tag = o_tag;
+
+ return rc;
+}
+
+/*
+ * ldap_back_dobind
+ *
+ * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
+ */
+int
+ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ return ldap_back_dobind_int( lcp, op, rs,
+ ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
+}
+
+/*
+ * ldap_back_default_rebind
+ *
+ * This is a callback used for chasing referrals using the same
+ * credentials as the original user on this session.
+ */
+int
+ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
+ ber_int_t msgid, void *params )
+{
+ ldapconn_t *lc = (ldapconn_t *)params;
+
+#ifdef HAVE_TLS
+ /* ... otherwise we couldn't get here */
+ assert( lc != NULL );
+
+ if ( !ldap_tls_inplace( ld ) ) {
+ int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
+ rc;
+ const char *text = NULL;
+
+ rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
+ lc->lc_ldapinfo->li_timeout[ SLAP_OP_BIND ], &text );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+ }
+#endif /* HAVE_TLS */
+
+ /* FIXME: add checks on the URL/identity? */
+ /* TODO: would like to count this bind operation for monitoring
+ * too, but where do we get the ldapinfo_t? */
+
+ return ldap_sasl_bind_s( ld,
+ BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
+ LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
+}
+
+/*
+ * ldap_back_default_urllist
+ */
+int
+ldap_back_default_urllist(
+ LDAP *ld,
+ LDAPURLDesc **urllist,
+ LDAPURLDesc **url,
+ void *params )
+{
+ ldapinfo_t *li = (ldapinfo_t *)params;
+ LDAPURLDesc **urltail;
+
+ if ( urllist == url ) {
+ return LDAP_SUCCESS;
+ }
+
+ for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
+ /* count */ ;
+
+ *urltail = *urllist;
+ *urllist = *url;
+ *url = NULL;
+
+ if ( !li->li_uri_mutex_do_not_lock ) {
+ ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
+ }
+
+ if ( li->li_uri ) {
+ ch_free( li->li_uri );
+ }
+
+ ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
+
+ if ( !li->li_uri_mutex_do_not_lock ) {
+ ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
+ }
+
+ return LDAP_SUCCESS;
+}
+
+int
+ldap_back_cancel(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ ber_int_t msgid,
+ ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ /* default behavior */
+ if ( LDAP_BACK_ABANDON( li ) ) {
+ return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
+ }
+
+ if ( LDAP_BACK_IGNORE( li ) ) {
+ return ldap_pvt_discard( lc->lc_ld, msgid );
+ }
+
+ if ( LDAP_BACK_CANCEL( li ) ) {
+ /* FIXME: asynchronous? */
+ return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
+ }
+
+ assert( 0 );
+
+ return LDAP_OTHER;
+}
+
+int
+ldap_back_op_result(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ ber_int_t msgid,
+ time_t timeout,
+ ldap_back_send_t sendok )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ char *match = NULL;
+ char *text = NULL;
+ char **refs = NULL;
+ LDAPControl **ctrls = NULL;
+
+ rs->sr_text = NULL;
+ rs->sr_matched = NULL;
+ rs->sr_ref = NULL;
+ rs->sr_ctrls = NULL;
+
+ /* if the error recorded in the reply corresponds
+ * to a successful state, get the error from the
+ * remote server response */
+ if ( LDAP_ERR_OK( rs->sr_err ) ) {
+ int rc;
+ struct timeval tv;
+ LDAPMessage *res = NULL;
+ time_t stoptime = (time_t)(-1);
+ int timeout_err = op->o_protocol >= LDAP_VERSION3 ?
+ LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
+ const char *timeout_text = "Operation timed out";
+
+ /* if timeout is not specified, compute and use
+ * the one specific to the ongoing operation */
+ if ( timeout == (time_t)(-1) ) {
+ slap_op_t opidx = slap_req2op( op->o_tag );
+
+ if ( opidx == SLAP_OP_SEARCH ) {
+ if ( op->ors_tlimit <= 0 ) {
+ timeout = 0;
+
+ } else {
+ timeout = op->ors_tlimit;
+ timeout_err = LDAP_TIMELIMIT_EXCEEDED;
+ timeout_text = NULL;
+ }
+
+ } else {
+ timeout = li->li_timeout[ opidx ];
+ }
+ }
+
+ /* better than nothing :) */
+ if ( timeout == 0 ) {
+ if ( li->li_idle_timeout ) {
+ timeout = li->li_idle_timeout;
+
+ } else if ( li->li_conn_ttl ) {
+ timeout = li->li_conn_ttl;
+ }
+ }
+
+ if ( timeout ) {
+ stoptime = op->o_time + timeout;
+ }
+
+ 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 && slap_get_time() > stoptime ) {
+ if ( sendok & LDAP_BACK_BINDING ) {
+ ldap_unbind_ext( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
+
+ /* let it be used, but taint/delete it so that
+ * no-one else can look it up any further */
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+
+ (void)ldap_back_conn_delete( li, lc );
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+
+#if LDAP_BACK_PRINT_CONNTREE > 0
+ ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
+#endif /* LDAP_BACK_PRINT_CONNTREE */
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ } else {
+ (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
+ }
+ rs->sr_err = timeout_err;
+ rs->sr_text = timeout_text;
+ break;
+ }
+
+ /* timeout == 0 */
+ 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:
+ /* only touch when activity actually took place... */
+ if ( li->li_idle_timeout ) {
+ lc->lc_time = op->o_time;
+ }
+
+ rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
+ &match, &text, &refs, &ctrls, 1 );
+ if ( rc == LDAP_SUCCESS ) {
+ rs->sr_text = text;
+ } else {
+ rs->sr_err = rc;
+ }
+ rs->sr_err = slap_map_api2result( rs );
+
+ /* RFC 4511: referrals can only appear
+ * if result code is LDAP_REFERRAL */
+ if ( refs != NULL
+ && refs[ 0 ] != NULL
+ && refs[ 0 ][ 0 ] != '\0' )
+ {
+ if ( rs->sr_err != LDAP_REFERRAL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "%s ldap_back_op_result: "
+ "got referrals with err=%d\n",
+ op->o_log_prefix,
+ rs->sr_err, 0 );
+
+ } else {
+ int i;
+
+ for ( i = 0; refs[ i ] != NULL; i++ )
+ /* count */ ;
+ rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
+ op->o_tmpmemctx );
+ for ( i = 0; refs[ i ] != NULL; i++ ) {
+ ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
+ }
+ BER_BVZERO( &rs->sr_ref[ i ] );
+ }
+
+ } else if ( rs->sr_err == LDAP_REFERRAL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "%s ldap_back_op_result: "
+ "got err=%d with null "
+ "or empty referrals\n",
+ op->o_log_prefix,
+ rs->sr_err, 0 );
+
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ }
+
+ if ( ctrls != NULL ) {
+ rs->sr_ctrls = ctrls;
+ }
+ }
+ }
+
+ /* if the error in the reply structure is not
+ * LDAP_SUCCESS, try to map it from client
+ * to server error */
+ if ( !LDAP_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 ( rs->sr_err == LDAP_UNAVAILABLE ) {
+ if ( !( sendok & LDAP_BACK_RETRYING ) ) {
+ if ( LDAP_BACK_QUARANTINE( li ) ) {
+ ldap_back_quarantine( op, rs );
+ }
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
+ if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
+ send_ldap_result( op, rs );
+ }
+ }
+
+ } else if ( op->o_conn &&
+ ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
+ || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
+ {
+ send_ldap_result( op, rs );
+ }
+
+ if ( text ) {
+ ldap_memfree( text );
+ }
+ rs->sr_text = NULL;
+
+ /* there can't be refs with a (successful) bind */
+ if ( rs->sr_ref ) {
+ op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
+ rs->sr_ref = NULL;
+ }
+
+ if ( refs ) {
+ ber_memvfree( (void **)refs );
+ }
+
+ /* match should not be possible with a successful bind */
+ if ( match ) {
+ if ( rs->sr_matched != match ) {
+ free( (char *)rs->sr_matched );
+ }
+ rs->sr_matched = NULL;
+ ldap_memfree( match );
+ }
+
+ if ( ctrls != NULL ) {
+ if ( op->o_tag == LDAP_REQ_BIND && rs->sr_err == LDAP_SUCCESS ) {
+ int i;
+
+ for ( i = 0; ctrls[i] != NULL; i++ );
+
+ rs->sr_ctrls = op->o_tmpalloc( sizeof( LDAPControl * )*( i + 1 ),
+ op->o_tmpmemctx );
+ for ( i = 0; ctrls[ i ] != NULL; i++ ) {
+ char *ptr;
+ ber_len_t oidlen = strlen( ctrls[i]->ldctl_oid );
+ ber_len_t size = sizeof( LDAPControl )
+ + oidlen + 1
+ + ctrls[i]->ldctl_value.bv_len + 1;
+
+ rs->sr_ctrls[ i ] = op->o_tmpalloc( size, op->o_tmpmemctx );
+ rs->sr_ctrls[ i ]->ldctl_oid = (char *)&rs->sr_ctrls[ i ][ 1 ];
+ lutil_strcopy( rs->sr_ctrls[ i ]->ldctl_oid, ctrls[i]->ldctl_oid );
+ rs->sr_ctrls[ i ]->ldctl_value.bv_val
+ = (char *)&rs->sr_ctrls[ i ]->ldctl_oid[oidlen + 1];
+ rs->sr_ctrls[ i ]->ldctl_value.bv_len
+ = ctrls[i]->ldctl_value.bv_len;
+ ptr = lutil_memcopy( rs->sr_ctrls[ i ]->ldctl_value.bv_val,
+ ctrls[i]->ldctl_value.bv_val, ctrls[i]->ldctl_value.bv_len );
+ *ptr = '\0';
+ }
+ rs->sr_ctrls[ i ] = NULL;
+ rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
+
+ } else {
+ assert( rs->sr_ctrls != NULL );
+ rs->sr_ctrls = NULL;
+ }
+
+ ldap_controls_free( ctrls );
+ }
+
+ return( LDAP_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 )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ int rc = 0;
+
+ assert( lcp != NULL );
+ assert( *lcp != NULL );
+
+ ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
+
+ if ( (*lcp)->lc_refcnt == 1 ) {
+ int binding = LDAP_BACK_CONN_BINDING( *lcp );
+
+ ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
+ 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_pvt_thread_mutex_unlock( &li->li_uri_mutex );
+
+ 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 ) {
+ /* freeit, because lc_refcnt == 1 */
+ (*lcp)->lc_refcnt = 0;
+ (void)ldap_back_freeconn( li, *lcp, 0 );
+ *lcp = NULL;
+ rc = 0;
+
+ } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
+ if ( binding ) {
+ LDAP_BACK_CONN_BINDING_SET( *lcp );
+ }
+ rc = 1;
+
+ } else {
+ rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
+ if ( rc == 0 && *lcp != NULL ) {
+ /* freeit, because lc_refcnt == 1 */
+ (*lcp)->lc_refcnt = 0;
+ LDAP_BACK_CONN_TAINTED_SET( *lcp );
+ (void)ldap_back_freeconn( li, *lcp, 0 );
+ *lcp = NULL;
+ }
+ }
+
+ } else {
+ Debug( LDAP_DEBUG_TRACE,
+ "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
+ (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
+
+ LDAP_BACK_CONN_TAINTED_SET( *lcp );
+ ldap_back_release_conn_lock( li, lcp, 0 );
+ assert( *lcp == NULL );
+
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ rs->sr_err = LDAP_UNAVAILABLE;
+ rs->sr_text = "Unable to retry";
+ send_ldap_result( op, rs );
+ }
+ }
+
+ ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
+
+ return rc;
+}
+
+static int
+ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
+ struct berval *binddn, struct berval *bindcred )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ struct berval ndn;
+ int dobind = 0;
+
+ if ( op->o_conn == NULL || op->o_do_not_cache ) {
+ goto done;
+ }
+
+ /* don't proxyAuthz if protocol is not LDAPv3 */
+ switch ( li->li_version ) {
+ case LDAP_VERSION3:
+ break;
+
+ case 0:
+ if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
+ break;
+ }
+ /* fall thru */
+
+ default:
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ dobind = -1;
+ }
+ goto done;
+ }
+
+ /* safe default */
+ *binddn = slap_empty_bv;
+ *bindcred = slap_empty_bv;
+
+ if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ ndn = op->o_conn->c_ndn;
+
+ } else {
+ ndn = op->o_ndn;
+ }
+
+ if ( !( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE )) {
+ if ( op->o_tag == LDAP_REQ_BIND && ( sendok & LDAP_BACK_SENDERR )) {
+ if ( !BER_BVISEMPTY( &ndn )) {
+ dobind = 0;
+ goto done;
+ }
+ } else if ( SLAP_IS_AUTHZ_BACKEND( op )) {
+ dobind = 0;
+ goto done;
+ }
+ }
+
+ 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 ( BER_BVISNULL( &ndn )
+ && li->li_idassert_authz == NULL
+ && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
+ {
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
+ rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ dobind = -1;
+ }
+
+ } else {
+ rs->sr_err = LDAP_SUCCESS;
+ *binddn = slap_empty_bv;
+ *bindcred = slap_empty_bv;
+ break;
+ }
+
+ goto done;
+
+ } else if ( !be_isroot( op ) ) {
+ if ( li->li_idassert_passthru ) {
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &ndn ) ) {
+ authcDN = slap_empty_bv;
+
+ } else {
+ authcDN = ndn;
+ }
+ rs->sr_err = slap_sasl_matches( op, li->li_idassert_passthru,
+ &authcDN, &authcDN );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ dobind = 0;
+ break;
+ }
+ }
+
+ if ( li->li_idassert_authz ) {
+ 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 ) {
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ dobind = -1;
+ }
+
+ } 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;
+ }
+
+done:;
+ return dobind;
+}
+
+static int
+ldap_back_proxy_authz_bind(
+ ldapconn_t *lc,
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ struct berval *binddn,
+ struct berval *bindcred )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+ struct berval ndn;
+ int msgid;
+ int rc;
+
+ if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ ndn = op->o_conn->c_ndn;
+
+ } else {
+ ndn = op->o_ndn;
+ }
+
+ if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
+#ifdef HAVE_CYRUS_SASL
+ void *defaults = NULL;
+ struct berval authzID = BER_BVNULL;
+ int freeauthz = 0;
+ LDAPControl **ctrlsp = NULL;
+ LDAPMessage *result = NULL;
+ const char *rmech = NULL;
+ const char *save_text = rs->sr_text;
+
+#ifdef SLAP_AUTH_DN
+ LDAPControl ctrl, *ctrls[2];
+ int msgid;
+#endif /* SLAP_AUTH_DN */
+
+ /* 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 ) {
+ rs->sr_err = LDAP_OTHER;
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ 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 );
+ if ( defaults == NULL ) {
+ rs->sr_err = LDAP_OTHER;
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ goto done;
+ }
+
+#ifdef SLAP_AUTH_DN
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
+ assert( BER_BVISNULL( binddn ) );
+
+ ctrl.ldctl_oid = LDAP_CONTROL_AUTHZID_REQUEST;
+ ctrl.ldctl_iscritical = 0;
+ BER_BVZERO( &ctrl.ldctl_value );
+ ctrls[0] = &ctrl;
+ ctrls[1] = NULL;
+ ctrlsp = ctrls;
+ }
+#endif /* SLAP_AUTH_DN */
+
+ do {
+ rs->sr_err = ldap_sasl_interactive_bind( lc->lc_ld, binddn->bv_val,
+ li->li_idassert_sasl_mech.bv_val,
+ ctrlsp, NULL, LDAP_SASL_QUIET, lutil_sasl_interact, defaults,
+ result, &rmech, &msgid );
+
+ if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS )
+ break;
+
+ ldap_msgfree( result );
+
+ if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) {
+ ldap_get_option( lc->lc_ld, LDAP_OPT_RESULT_CODE, (void*)&rs->sr_err );
+ ldap_get_option( lc->lc_ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&rs->sr_text );
+ break;
+ }
+ } while ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
+
+ ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+ ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
+ ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+ switch ( rs->sr_err ) {
+ case LDAP_SUCCESS:
+#ifdef SLAP_AUTH_DN
+ /* FIXME: right now, the only reason to check
+ * response controls is RFC 3829 authzid */
+ if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
+ ctrlsp = NULL;
+ rc = ldap_parse_result( lc->lc_ld, result, NULL, NULL, NULL, NULL,
+ &ctrlsp, 0 );
+ if ( rc == LDAP_SUCCESS && ctrlsp ) {
+ LDAPControl *ctrl;
+
+ ctrl = ldap_control_find( LDAP_CONTROL_AUTHZID_RESPONSE,
+ ctrlsp, NULL );
+ if ( ctrl ) {
+ Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (authzid)\n",
+ op->o_log_prefix, ctrl->ldctl_value.bv_val, 0 );
+ if ( ctrl->ldctl_value.bv_len > STRLENOF("dn:") &&
+ strncasecmp( ctrl->ldctl_value.bv_val, "dn:", STRLENOF("dn:") ) == 0 )
+ {
+ struct berval bv;
+ bv.bv_val = &ctrl->ldctl_value.bv_val[STRLENOF("dn:")];
+ bv.bv_len = ctrl->ldctl_value.bv_len - STRLENOF("dn:");
+ ber_bvreplace( &lc->lc_bound_ndn, &bv );
+ }
+ }
+ }
+
+ ldap_controls_free( ctrlsp );
+
+ } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_WHOAMI ) {
+ struct berval *val = NULL;
+ rc = ldap_whoami_s( lc->lc_ld, &val, NULL, NULL );
+ if ( rc == LDAP_SUCCESS && val != NULL ) {
+ Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (whoami)\n",
+ op->o_log_prefix, val->bv_val, 0 );
+ if ( val->bv_len > STRLENOF("dn:") &&
+ strncasecmp( val->bv_val, "dn:", STRLENOF("dn:") ) == 0 )
+ {
+ struct berval bv;
+ bv.bv_val = &val->bv_val[STRLENOF("dn:")];
+ bv.bv_len = val->bv_len - STRLENOF("dn:");
+ ber_bvreplace( &lc->lc_bound_ndn, &bv );
+ }
+ ber_bvfree( val );
+ }
+ }
+
+ if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_MASK ) &&
+ BER_BVISNULL( &lc->lc_bound_ndn ) )
+ {
+ /* all in all, we only need it to be non-null */
+ /* FIXME: should this be configurable? */
+ static struct berval bv = BER_BVC("cn=authzdn");
+ ber_bvreplace( &lc->lc_bound_ndn, &bv );
+ }
+#endif /* SLAP_AUTH_DN */
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ break;
+
+ case LDAP_LOCAL_ERROR:
+ /* list client API error codes that require
+ * to taint the connection */
+ /* FIXME: should actually retry? */
+ LDAP_BACK_CONN_TAINTED_SET( lc );
+
+ /* fallthru */
+
+ default:
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ rs->sr_err = slap_map_api2result( rs );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ break;
+ }
+
+ if ( save_text != rs->sr_text ) {
+ ldap_memfree( (char *)rs->sr_text );
+ rs->sr_text = save_text;
+ }
+
+ ldap_msgfree( result );
+
+ 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:
+ /* FIXME: do we really need this? */
+ BER_BVSTR( binddn, "" );
+ BER_BVSTR( bindcred, "" );
+ /* fallthru */
+
+ case LDAP_AUTH_SIMPLE:
+ rs->sr_err = ldap_sasl_bind( lc->lc_ld,
+ binddn->bv_val, LDAP_SASL_SIMPLE,
+ bindcred, NULL, NULL, &msgid );
+ rc = ldap_back_op_result( lc, op, rs, msgid,
+ -1, ( sendok | LDAP_BACK_BINDING ) );
+
+ ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+ ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
+ ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+ break;
+
+ default:
+ /* unsupported! */
+ LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
+ rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ }
+ goto done;
+ }
+
+ if ( rc == LDAP_SUCCESS ) {
+ /* set rebind stuff in case of successful proxyAuthz bind,
+ * so that referral chasing is attempted using the right
+ * identity */
+ LDAP_BACK_CONN_ISBOUND_SET( lc );
+ if ( !BER_BVISNULL( binddn ) ) {
+ ber_bvreplace( &lc->lc_bound_ndn, binddn );
+ }
+
+ if ( !BER_BVISNULL( &lc->lc_cred ) ) {
+ memset( lc->lc_cred.bv_val, 0,
+ lc->lc_cred.bv_len );
+ }
+
+ if ( LDAP_BACK_SAVECRED( li ) ) {
+ if ( !BER_BVISNULL( bindcred ) ) {
+ ber_bvreplace( &lc->lc_cred, bindcred );
+ ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
+ }
+
+ } else {
+ lc->lc_cred.bv_len = 0;
+ }
+ }
+
+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(
+ Operation *op,
+ SlapReply *rs,
+ struct berval *bound_ndn,
+ int version,
+ slap_idassert_t *si,
+ LDAPControl *ctrl )
+{
+ slap_idassert_mode_t mode;
+ struct berval assertedID,
+ ndn;
+ int isroot = 0;
+
+ rs->sr_err = SLAP_CB_CONTINUE;
+
+ /* 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( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
+ && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
+ && BER_BVISNULL( &si->si_bc.sb_saslmech ) )
+ {
+ goto done;
+ }
+
+ if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
+ goto done;
+ }
+
+ if ( op->o_tag == LDAP_REQ_BIND ) {
+ ndn = op->o_req_ndn;
+
+ } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
+ ndn = op->o_conn->c_ndn;
+
+ } else {
+ ndn = op->o_ndn;
+ }
+
+ if ( si->si_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( bound_ndn ) ) {
+ goto done;
+ }
+
+ if ( BER_BVISNULL( &ndn ) ) {
+ goto done;
+ }
+
+ if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
+ goto done;
+ }
+
+ } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
+ if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
+ {
+ /* already asserted in SASL via native authz */
+ goto done;
+ }
+
+ } else if ( si->si_authz && !isroot ) {
+ int rc;
+ struct berval authcDN;
+
+ if ( BER_BVISNULL( &ndn ) ) {
+ authcDN = slap_empty_bv;
+ } else {
+ authcDN = ndn;
+ }
+ rc = slap_sasl_matches( op, si->si_authz,
+ &authcDN, &authcDN );
+ if ( rc != LDAP_SUCCESS ) {
+ if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
+ /* ndn is not authorized
+ * to use idassert */
+ rs->sr_err = rc;
+ }
+ goto done;
+ }
+ }
+
+ 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 = si->si_mode;
+ }
+
+ switch ( mode ) {
+ case LDAP_BACK_IDASSERT_LEGACY:
+ /* original behavior:
+ * assert the client's identity */
+ case LDAP_BACK_IDASSERT_SELF:
+ 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 = si->si_bc.sb_authzId;
+ break;
+
+ default:
+ assert( 0 );
+ }
+
+ /* if we got here, "" is allowed to proxyAuthz */
+ if ( BER_BVISNULL( &assertedID ) ) {
+ assertedID = slap_empty_bv;
+ }
+
+ /* don't idassert the bound DN (ITS#4497) */
+ if ( dn_match( &assertedID, bound_ndn ) ) {
+ goto done;
+ }
+
+ ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
+ ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL );
+
+ switch ( si->si_mode ) {
+ /* already in u:ID or dn:DN form */
+ case LDAP_BACK_IDASSERT_OTHERID:
+ case LDAP_BACK_IDASSERT_OTHERDN:
+ ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx );
+ rs->sr_err = LDAP_SUCCESS;
+ break;
+
+ /* needs the dn: prefix */
+ default:
+ ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
+ ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1,
+ op->o_tmpmemctx );
+ AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
+ AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
+ assertedID.bv_val, assertedID.bv_len + 1 );
+ rs->sr_err = LDAP_SUCCESS;
+ break;
+ }
+
+ /* Older versions of <draft-weltman-ldapv3-proxy> required
+ * to encode the value of the authzID (and called it proxyDN);
+ * this hack provides compatibility with those DSAs that
+ * implement it this way */
+ if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
+ struct berval authzID = ctrl->ldctl_value;
+ BerElementBuffer berbuf;
+ BerElement *ber = (BerElement *)&berbuf;
+ ber_tag_t tag;
+
+ ber_init2( ber, 0, LBER_USE_DER );
+ ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
+
+ tag = ber_printf( ber, "O", &authzID );
+ if ( tag == LBER_ERROR ) {
+ rs->sr_err = LDAP_OTHER;
+ goto free_ber;
+ }
+
+ if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
+ rs->sr_err = LDAP_OTHER;
+ goto free_ber;
+ }
+
+ rs->sr_err = LDAP_SUCCESS;
+
+free_ber:;
+ op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
+ ber_free_buf( ber );
+
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto done;
+ }
+
+ } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
+ struct berval authzID = ctrl->ldctl_value,
+ tmp;
+ BerElementBuffer berbuf;
+ BerElement *ber = (BerElement *)&berbuf;
+ ber_tag_t tag;
+
+ if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
+ rs->sr_err = LDAP_PROTOCOL_ERROR;
+ goto done;
+ }
+
+ tmp = authzID;
+ tmp.bv_val += STRLENOF( "dn:" );
+ tmp.bv_len -= STRLENOF( "dn:" );
+
+ ber_init2( ber, 0, LBER_USE_DER );
+ ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
+
+ /* apparently, Mozilla API encodes this
+ * as "SEQUENCE { LDAPDN }" */
+ tag = ber_printf( ber, "{O}", &tmp );
+ if ( tag == LBER_ERROR ) {
+ rs->sr_err = LDAP_OTHER;
+ goto free_ber2;
+ }
+
+ if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
+ rs->sr_err = LDAP_OTHER;
+ goto free_ber2;
+ }
+
+ ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
+ rs->sr_err = LDAP_SUCCESS;
+
+free_ber2:;
+ op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
+ ber_free_buf( ber );
+
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto done;
+ }
+ }
+
+done:;
+
+ return rs->sr_err;
+}
+
+/*
+ * Add controls;
+ *
+ * if any needs to be added, it is prepended to existing ones,
+ * in a newly allocated array. The companion function
+ * ldap_back_controls_free() must be used to restore the original
+ * status of op->o_ctrls.
+ */
+int
+ldap_back_controls_add(
+ Operation *op,
+ SlapReply *rs,
+ ldapconn_t *lc,
+ LDAPControl ***pctrls )
+{
+ ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
+
+ LDAPControl **ctrls = NULL;
+ /* set to the maximum number of controls this backend can add */
+ LDAPControl c[ 2 ] = { { 0 } };
+ int n = 0, i, j1 = 0, j2 = 0;
+
+ *pctrls = NULL;
+
+ rs->sr_err = LDAP_SUCCESS;
+
+ /* don't add controls if protocol is not LDAPv3 */
+ switch ( li->li_version ) {
+ case LDAP_VERSION3:
+ break;
+
+ case 0:
+ if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
+ break;
+ }
+ /* fall thru */
+
+ default:
+ goto done;
+ }
+
+ /* put controls that go __before__ existing ones here */
+
+ /* proxyAuthz for identity assertion */
+ switch ( ldap_back_proxy_authz_ctrl( op, rs, &lc->lc_bound_ndn,
+ li->li_version, &li->li_idassert, &c[ j1 ] ) )
+ {
+ case SLAP_CB_CONTINUE:
+ break;
+
+ case LDAP_SUCCESS:
+ j1++;
+ break;
+
+ default:
+ goto done;
+ }
+
+ /* put controls that go __after__ existing ones here */
+
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+ /* FIXME: according to <draft-wahl-ldap-session>,
+ * the server should check if the control can be added
+ * based on the identity of the client and so */
+
+ /* session tracking */
+ if ( LDAP_BACK_ST_REQUEST( li ) ) {
+ switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
+ case SLAP_CB_CONTINUE:
+ break;
+
+ case LDAP_SUCCESS:
+ j2++;
+ break;
+
+ default:
+ goto done;
+ }
+ }
+#endif /* SLAP_CONTROL_X_SESSION_TRACKING */
+
+ if ( rs->sr_err == SLAP_CB_CONTINUE ) {
+ rs->sr_err = LDAP_SUCCESS;
+ }
+
+ /* if nothing to do, just bail out */
+ if ( j1 == 0 && j2 == 0 ) {
+ goto done;
+ }
+
+ assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
+
+ if ( op->o_ctrls ) {
+ for ( n = 0; op->o_ctrls[ n ]; n++ )
+ /* just count ctrls */ ;
+ }
+
+ ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
+ op->o_tmpmemctx );
+ if ( j1 ) {
+ ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
+ *ctrls[ 0 ] = c[ 0 ];
+ for ( i = 1; i < j1; i++ ) {
+ ctrls[ i ] = &ctrls[ 0 ][ i ];
+ *ctrls[ i ] = c[ i ];
+ }
+ }
+
+ i = 0;
+ if ( op->o_ctrls ) {
+ for ( i = 0; op->o_ctrls[ i ]; i++ ) {
+ ctrls[ i + j1 ] = op->o_ctrls[ i ];
+ }
+ }
+
+ n += j1;
+ if ( j2 ) {
+ ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
+ *ctrls[ n ] = c[ j1 ];
+ for ( i = 1; i < j2; i++ ) {
+ ctrls[ n + i ] = &ctrls[ n ][ i ];
+ *ctrls[ n + i ] = c[ i ];
+ }
+ }
+
+ ctrls[ n + j2 ] = NULL;
+
+done:;
+ if ( ctrls == NULL ) {
+ ctrls = op->o_ctrls;
+ }
+
+ *pctrls = ctrls;
+
+ return rs->sr_err;
+}
+
+int
+ldap_back_controls_free( Operation *op, SlapReply *rs, LDAPControl ***pctrls )
+{
+ LDAPControl **ctrls = *pctrls;
+
+ /* we assume that the controls added by the proxy come first,
+ * so as soon as we find op->o_ctrls[ 0 ] we can stop */
+ if ( ctrls && ctrls != op->o_ctrls ) {
+ int i = 0, n = 0, n_added;
+ LDAPControl *lower, *upper;
+
+ assert( ctrls[ 0 ] != NULL );
+
+ for ( n = 0; ctrls[ n ] != NULL; n++ )
+ /* count 'em */ ;
+
+ if ( op->o_ctrls ) {
+ for ( i = 0; op->o_ctrls[ i ] != NULL; i++ )
+ /* count 'em */ ;
+ }
+
+ n_added = n - i;
+ lower = (LDAPControl *)&ctrls[ n ];
+ upper = &lower[ n_added ];
+
+ for ( i = 0; ctrls[ i ] != NULL; i++ ) {
+ if ( ctrls[ i ] < lower || ctrls[ i ] >= upper ) {
+ /* original; don't touch */
+ continue;
+ }
+
+ if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
+ op->o_tmpfree( ctrls[ i ]->ldctl_value.bv_val, op->o_tmpmemctx );
+ }
+ }
+
+ op->o_tmpfree( ctrls, op->o_tmpmemctx );
+ }
+
+ *pctrls = NULL;
+
+ return 0;
+}
+
+int
+ldap_back_conn2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
+{
+ char tbuf[ SLAP_TEXT_BUFLEN ];
+ char *ptr = buf, *end = buf + buflen;
+ int len;
+
+ if ( ptr + sizeof("conn=") > end ) return -1;
+ ptr = lutil_strcopy( ptr, "conn=" );
+
+ len = ldap_back_connid2str( lc, ptr, (ber_len_t)(end - ptr) );
+ ptr += len;
+ if ( ptr >= end ) return -1;
+
+ if ( !BER_BVISNULL( &lc->lcb_local_ndn ) ) {
+ if ( ptr + sizeof(" DN=\"\"") + lc->lcb_local_ndn.bv_len > end ) return -1;
+ ptr = lutil_strcopy( ptr, " DN=\"" );
+ ptr = lutil_strncopy( ptr, lc->lcb_local_ndn.bv_val, lc->lcb_local_ndn.bv_len );
+ *ptr++ = '"';
+ }
+
+ if ( lc->lcb_create_time != 0 ) {
+ len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_create_time );
+ if ( ptr + sizeof(" created=") + len >= end ) return -1;
+ ptr = lutil_strcopy( ptr, " created=" );
+ ptr = lutil_strcopy( ptr, tbuf );
+ }
+
+ if ( lc->lcb_time != 0 ) {
+ len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_time );
+ if ( ptr + sizeof(" modified=") + len >= end ) return -1;
+ ptr = lutil_strcopy( ptr, " modified=" );
+ ptr = lutil_strcopy( ptr, tbuf );
+ }
+
+ len = snprintf( tbuf, sizeof(tbuf), "%u", lc->lcb_refcnt );
+ if ( ptr + sizeof(" refcnt=") + len >= end ) return -1;
+ ptr = lutil_strcopy( ptr, " refcnt=" );
+ ptr = lutil_strcopy( ptr, tbuf );
+
+ return ptr - buf;
+}
+
+int
+ldap_back_connid2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
+{
+ static struct berval conns[] = {
+ BER_BVC("ROOTDN"),
+ BER_BVC("ROOTDN-TLS"),
+ BER_BVC("ANON"),
+ BER_BVC("ANON-TLS"),
+ BER_BVC("BIND"),
+ BER_BVC("BIND-TLS"),
+ BER_BVNULL
+ };
+
+ int len = 0;
+
+ if ( LDAP_BACK_PCONN_ISPRIV( (const ldapconn_t *)lc ) ) {
+ long cid;
+ struct berval *bv;
+
+ cid = (long)lc->lcb_conn;
+ assert( cid >= LDAP_BACK_PCONN_FIRST && cid < LDAP_BACK_PCONN_LAST );
+
+ bv = &conns[ cid ];
+
+ if ( bv->bv_len >= buflen ) {
+ return bv->bv_len + 1;
+ }
+
+ len = bv->bv_len;
+ lutil_strncopy( buf, bv->bv_val, bv->bv_len + 1 );
+
+ } else {
+ len = snprintf( buf, buflen, "%lu", lc->lcb_conn->c_connid );
+ }
+
+ return len;
+}