--- /dev/null
+/* denyop.c - Denies operations */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2004 The OpenLDAP Foundation.
+ * 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 Pierangelo Masarati for inclusion in
+ * OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#ifdef SLAPD_OVER_DENYOP
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+
+/* This overlay provides a quick'n'easy way to deny selected operations
+ * for a database whose backend implements the operations. It is intended
+ * to be less expensive than ACLs because its evaluation occurs before
+ * any backend specific operation is actually even initiated.
+ */
+
+enum {
+ denyop_add = 0,
+ denyop_bind,
+ denyop_compare,
+ denyop_delete,
+ denyop_extended,
+ denyop_modify,
+ denyop_modrdn,
+ denyop_search,
+ denyop_unbind
+} denyop_e;
+
+typedef struct denyop_info {
+ int do_op[denyop_unbind + 1];
+} denyop_info;
+
+static int
+denyop_func( Operation *op, SlapReply *rs )
+{
+ slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+ denyop_info *oi = (denyop_info *)on->on_bi.bi_private;
+ int deny = 0;
+
+ switch( op->o_tag ) {
+ case LDAP_REQ_BIND:
+ deny = oi->do_op[denyop_bind];
+ break;
+
+ case LDAP_REQ_ADD:
+ deny = oi->do_op[denyop_add];
+ break;
+
+ case LDAP_REQ_DELETE:
+ deny = oi->do_op[denyop_delete];
+ break;
+
+ case LDAP_REQ_MODRDN:
+ deny = oi->do_op[denyop_modrdn];
+ break;
+
+ case LDAP_REQ_MODIFY:
+ deny = oi->do_op[denyop_modify];
+ break;
+
+ case LDAP_REQ_COMPARE:
+ deny = oi->do_op[denyop_compare];
+ break;
+
+ case LDAP_REQ_SEARCH:
+ deny = oi->do_op[denyop_search];
+ break;
+
+ case LDAP_REQ_EXTENDED:
+ deny = oi->do_op[denyop_extended];
+ break;
+
+ case LDAP_REQ_UNBIND:
+ deny = oi->do_op[denyop_unbind];
+ break;
+ }
+
+ if ( !deny ) {
+ return SLAP_CB_CONTINUE;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on->on_info;
+ send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+ "operation not allowed within namingContext" );
+
+ return 0;
+}
+
+static int
+denyop_over_init(
+ BackendDB *be
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ denyop_info *oi;
+
+ oi = (denyop_info *)ch_malloc(sizeof(denyop_info));
+ memset(oi, 0, sizeof(denyop_info));
+ on->on_bi.bi_private = oi;
+
+ return 0;
+}
+
+static int
+denyop_config(
+ BackendDB *be,
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ denyop_info *oi = (denyop_info *)on->on_bi.bi_private;
+
+ if ( strcasecmp( argv[0], "denyop" ) == 0 ) {
+ char *op;
+
+ if ( argc != 2 ) {
+ Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+ "operation list missing in "
+ "\"denyop <op-list>\" line.\n",
+ fname, lineno, 0 );
+ return( 1 );
+ }
+
+ /* The on->on_bi.bi_private pointer can be used for
+ * anything this instance of the overlay needs.
+ */
+
+ op = argv[1];
+ do {
+ char *next = strchr( op, ',' );
+
+ if ( next ) {
+ next[0] = '\0';
+ next++;
+ }
+
+ if ( strcmp( op, "add" ) == 0 ) {
+ oi->do_op[denyop_add] = 1;
+
+ } else if ( strcmp( op, "bind" ) == 0 ) {
+ oi->do_op[denyop_bind] = 1;
+
+ } else if ( strcmp( op, "compare" ) == 0 ) {
+ oi->do_op[denyop_compare] = 1;
+
+ } else if ( strcmp( op, "delete" ) == 0 ) {
+ oi->do_op[denyop_delete] = 1;
+
+ } else if ( strcmp( op, "extended" ) == 0 ) {
+ oi->do_op[denyop_extended] = 1;
+
+ } else if ( strcmp( op, "modify" ) == 0 ) {
+ oi->do_op[denyop_modify] = 1;
+
+ } else if ( strcmp( op, "modrdn" ) == 0 ) {
+ oi->do_op[denyop_modrdn] = 1;
+
+ } else if ( strcmp( op, "search" ) == 0 ) {
+ oi->do_op[denyop_search] = 1;
+
+ } else if ( strcmp( op, "unbind" ) == 0 ) {
+ oi->do_op[denyop_unbind] = 1;
+
+ } else {
+ Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+ "unknown operation \"%s\" "
+ "\"denyop <op-list>\" line.\n",
+ op, fname, lineno );
+ return( 1 );
+ }
+
+ op = next;
+ } while ( op );
+
+ } else {
+ return SLAP_CONF_UNKNOWN;
+ }
+ return 0;
+}
+
+static int
+denyop_destroy(
+ BackendDB *be
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ denyop_info *oi = (denyop_info *)on->on_bi.bi_private;
+
+ if ( oi ) {
+ ch_free( oi );
+ }
+
+ return 0;
+}
+
+/* This overlay is set up for dynamic loading via moduleload. For static
+ * configuration, you'll need to arrange for the slap_overinst to be
+ * initialized and registered by some other function inside slapd.
+ */
+
+static slap_overinst denyop;
+
+int denyop_init() {
+ memset( &denyop, 0, sizeof( slap_overinst ) );
+ denyop.on_bi.bi_type = "denyop";
+ denyop.on_bi.bi_db_init = denyop_over_init;
+ denyop.on_bi.bi_db_config = denyop_config;
+ denyop.on_bi.bi_db_destroy = denyop_destroy;
+
+ denyop.on_bi.bi_op_bind = denyop_func;
+ denyop.on_bi.bi_op_search = denyop_func;
+ denyop.on_bi.bi_op_compare = denyop_func;
+ denyop.on_bi.bi_op_modify = denyop_func;
+ denyop.on_bi.bi_op_modrdn = denyop_func;
+ denyop.on_bi.bi_op_add = denyop_func;
+ denyop.on_bi.bi_op_delete = denyop_func;
+ denyop.on_bi.bi_extended = denyop_func;
+ denyop.on_bi.bi_op_unbind = denyop_func;
+
+ denyop.on_response = NULL /* denyop_response */ ;
+
+ return overlay_register( &denyop );
+}
+
+#if SLAPD_OVER_DENYOP == SLAPD_MOD_DYNAMIC
+int init_module(int argc, char *argv[]) {
+ return denyop_init();
+}
+#endif
+
+#endif /* defined(SLAPD_OVER_DENYOP) */
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