1 files changed, 439 insertions, 0 deletions

diff --git a/servers/slapd/search.c b/servers/slapd/search.c
new file mode 100644
index 0000000..7846f0f
--- /dev/null
+++ b/servers/slapd/search.c
@@ -0,0 +1,439 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 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>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "lutil.h"
+#include "slap.h"
+
+int
+do_search(
+    Operation	*op,	/* info about the op to which we're responding */
+    SlapReply	*rs	/* all the response data we'll send */ )
+{
+	struct berval base = BER_BVNULL;
+	ber_len_t	siz, off, i;
+
+	Debug( LDAP_DEBUG_TRACE, "%s do_search\n",
+		op->o_log_prefix );
+	/*
+	 * Parse the search request.  It looks like this:
+	 *
+	 *	SearchRequest := [APPLICATION 3] SEQUENCE {
+	 *		baseObject	DistinguishedName,
+	 *		scope		ENUMERATED {
+	 *			baseObject	(0),
+	 *			singleLevel	(1),
+	 *			wholeSubtree (2),
+	 *          subordinate (3)  -- OpenLDAP extension
+	 *		},
+	 *		derefAliases	ENUMERATED {
+	 *			neverDerefaliases	(0),
+	 *			derefInSearching	(1),
+	 *			derefFindingBaseObj	(2),
+	 *			alwaysDerefAliases	(3)
+	 *		},
+	 *		sizelimit	INTEGER (0 .. 65535),
+	 *		timelimit	INTEGER (0 .. 65535),
+	 *		attrsOnly	BOOLEAN,
+	 *		filter		Filter,
+	 *		attributes	SEQUENCE OF AttributeType
+	 *	}
+	 */
+
+	/* baseObject, scope, derefAliases, sizelimit, timelimit, attrsOnly */
+	if ( ber_scanf( op->o_ber, "{miiiib" /*}*/,
+		&base, &op->ors_scope, &op->ors_deref, &op->ors_slimit,
+	    &op->ors_tlimit, &op->ors_attrsonly ) == LBER_ERROR )
+	{
+		send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+		rs->sr_err = SLAPD_DISCONNECT;
+		goto return_results;
+	}
+
+	if ( op->ors_tlimit < 0 || op->ors_tlimit > SLAP_MAX_LIMIT ) {
+		send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid time limit" );
+		goto return_results;
+	}
+
+	if ( op->ors_slimit < 0 || op->ors_slimit > SLAP_MAX_LIMIT ) {
+		send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid size limit" );
+		goto return_results;
+	}
+
+	switch( op->ors_scope ) {
+	case LDAP_SCOPE_BASE:
+	case LDAP_SCOPE_ONELEVEL:
+	case LDAP_SCOPE_SUBTREE:
+	case LDAP_SCOPE_SUBORDINATE:
+		break;
+	default:
+		send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid scope" );
+		goto return_results;
+	}
+
+	switch( op->ors_deref ) {
+	case LDAP_DEREF_NEVER:
+	case LDAP_DEREF_FINDING:
+	case LDAP_DEREF_SEARCHING:
+	case LDAP_DEREF_ALWAYS:
+		break;
+	default:
+		send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid deref" );
+		goto return_results;
+	}
+
+	rs->sr_err = dnPrettyNormal( NULL, &base, &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_search: invalid dn: \"%s\"\n",
+			op->o_log_prefix, base.bv_val );
+		send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
+		goto return_results;
+	}
+
+	Debug( LDAP_DEBUG_ARGS, "SRCH \"%s\" %d %d    %d %d %d\n",
+		base.bv_val, op->ors_scope, op->ors_deref,
+		op->ors_slimit, op->ors_tlimit, op->ors_attrsonly);
+
+	/* filter - returns a "normalized" version */
+	rs->sr_err = get_filter( op, op->o_ber, &op->ors_filter, &rs->sr_text );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		if( rs->sr_err == SLAPD_DISCONNECT ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			send_ldap_disconnect( op, rs );
+			rs->sr_err = SLAPD_DISCONNECT;
+		} else {
+			send_ldap_result( op, rs );
+		}
+		goto return_results;
+	}
+	filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
+	
+	Debug( LDAP_DEBUG_ARGS, "    filter: %s\n",
+		!BER_BVISEMPTY( &op->ors_filterstr ) ? op->ors_filterstr.bv_val : "empty" );
+
+	/* attributes */
+	siz = sizeof(AttributeName);
+	off = offsetof(AttributeName,an_name);
+	if ( ber_scanf( op->o_ber, "{M}}", &op->ors_attrs, &siz, off ) == LBER_ERROR ) {
+		send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding attrs error" );
+		rs->sr_err = SLAPD_DISCONNECT;
+		goto return_results;
+	}
+	for ( i=0; i<siz; i++ ) {
+		const char *dummy;	/* ignore msgs from bv2ad */
+		op->ors_attrs[i].an_desc = NULL;
+		op->ors_attrs[i].an_oc = NULL;
+		op->ors_attrs[i].an_flags = 0;
+		if ( slap_bv2ad( &op->ors_attrs[i].an_name,
+			&op->ors_attrs[i].an_desc, &dummy ) != LDAP_SUCCESS )
+		{
+			if ( slap_bv2undef_ad( &op->ors_attrs[i].an_name,
+				&op->ors_attrs[i].an_desc, &dummy,
+				SLAP_AD_PROXIED|SLAP_AD_NOINSERT ) )
+			{
+				struct berval *bv = &op->ors_attrs[i].an_name;
+
+				/* RFC 4511 LDAPv3: All User Attributes */
+				if ( bvmatch( bv, slap_bv_all_user_attrs ) ) {
+					continue;
+				}
+
+				/* RFC 3673 LDAPv3: All Operational Attributes */
+				if ( bvmatch( bv, slap_bv_all_operational_attrs ) ) {
+					continue;
+				}
+
+				/* RFC 4529 LDAP: Requesting Attributes by Object Class */
+				if ( bv->bv_len > 1 && bv->bv_val[0] == '@' ) {
+					/* FIXME: check if remaining is valid oc name? */
+					continue;
+				}
+
+				/* add more "exceptions" to RFC 4511 4.5.1.8. */
+
+				/* invalid attribute description? remove */
+				if ( ad_keystring( bv ) ) {
+					/* NOTE: parsed in-place, don't modify;
+					 * rather add "1.1", which must be ignored */
+					BER_BVSTR( &op->ors_attrs[i].an_name, LDAP_NO_ATTRS );
+				}
+
+				/* otherwise leave in place... */
+			}
+		}
+	}
+
+	if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_search: get_ctrls failed\n",
+			op->o_log_prefix );
+		goto return_results;
+	}
+
+	if (LogTest( LDAP_DEBUG_ARGS ) ) {
+		char abuf[BUFSIZ/2], *ptr = abuf;
+		unsigned len = 0, alen;
+
+		if ( !siz ) {
+			len = 1;
+			abuf[0] = '\0';
+		}
+		for ( i = 0; i<siz; i++ ) {
+			alen = op->ors_attrs[i].an_name.bv_len;
+			if (alen >= sizeof(abuf)) {
+				alen = sizeof(abuf)-1;
+			}
+			if (len && (len + 1 + alen >= sizeof(abuf))) {
+				Debug( LDAP_DEBUG_ARGS, "    attrs: %s\n", abuf );
+				len = 0;
+				ptr = abuf;
+			}
+			if (len) {
+				*ptr++ = ' ';
+				len++;
+			}
+			ptr = lutil_strncopy(ptr, op->ors_attrs[i].an_name.bv_val, alen);
+			len += alen;
+			*ptr = '\0';
+		}
+		if (len) {
+			Debug( LDAP_DEBUG_ARGS, "    attrs: %s\n", abuf );
+		}
+	}
+
+	if (LogTest( LDAP_DEBUG_STATS ) ) {
+		char abuf[BUFSIZ/2], *ptr = abuf;
+		unsigned len = 0, alen;
+
+		sprintf(abuf, "scope=%d deref=%d", op->ors_scope, op->ors_deref);
+		Debug( LDAP_DEBUG_STATS,
+		        "%s SRCH base=\"%s\" %s filter=\"%s\"\n",
+		        op->o_log_prefix, op->o_req_dn.bv_val, abuf,
+		        op->ors_filterstr.bv_val );
+
+		for ( i = 0; i<siz; i++ ) {
+			alen = op->ors_attrs[i].an_name.bv_len;
+			if (alen >= sizeof(abuf)) {
+				alen = sizeof(abuf)-1;
+			}
+			if (len && (len + 1 + alen >= sizeof(abuf))) {
+				Debug( LDAP_DEBUG_STATS, "%s SRCH attr=%s\n",
+				    op->o_log_prefix, abuf );
+				len = 0;
+				ptr = abuf;
+			}
+			if (len) {
+				*ptr++ = ' ';
+				len++;
+			}
+			ptr = lutil_strncopy(ptr, op->ors_attrs[i].an_name.bv_val, alen);
+			len += alen;
+			*ptr = '\0';
+		}
+		if (len) {
+			Debug( LDAP_DEBUG_STATS, "%s SRCH attr=%s\n",
+					op->o_log_prefix, abuf );
+		}
+	}
+
+	op->o_bd = frontendDB;
+	rs->sr_err = frontendDB->be_search( op, rs );
+	if ( rs->sr_err == SLAPD_ASYNCOP ) {
+		/* skip cleanup */
+		return rs->sr_err;
+	}
+
+return_results:;
+	if ( !BER_BVISNULL( &op->o_req_dn ) ) {
+		slap_sl_free( op->o_req_dn.bv_val, op->o_tmpmemctx );
+	}
+	if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
+		slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+	}
+	if ( !BER_BVISNULL( &op->ors_filterstr ) ) {
+		op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+	}
+	if ( op->ors_filter != NULL) {
+		filter_free_x( op, op->ors_filter, 1 );
+	}
+	if ( op->ors_attrs != NULL ) {
+		op->o_tmpfree( op->ors_attrs, op->o_tmpmemctx );
+	}
+
+	return rs->sr_err;
+}
+
+int
+fe_op_search( Operation *op, SlapReply *rs )
+{
+	BackendDB		*bd = op->o_bd;
+
+	if ( op->ors_scope == LDAP_SCOPE_BASE ) {
+		Entry *entry = NULL;
+
+		if ( BER_BVISEMPTY( &op->o_req_ndn ) ) {
+#ifdef LDAP_CONNECTIONLESS
+			/* Ignore LDAPv2 CLDAP Root DSE queries */
+			if (op->o_protocol == LDAP_VERSION2 && op->o_conn->c_is_udp) {
+				goto return_results;
+			}
+#endif
+			/* check restrictions */
+			if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+				send_ldap_result( op, rs );
+				goto return_results;
+			}
+
+			rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
+
+		} else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
+			/* check restrictions */
+			if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+				send_ldap_result( op, rs );
+				goto return_results;
+			}
+
+			rs->sr_err = schema_info( &entry, &rs->sr_text );
+		}
+
+		if( rs->sr_err != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			goto return_results;
+
+		} else if ( entry != NULL ) {
+			if ( get_assert( op ) &&
+				( test_filter( op, entry, get_assertion( op )) != LDAP_COMPARE_TRUE )) {
+				rs->sr_err = LDAP_ASSERTION_FAILED;
+				goto fail1;
+			}
+
+			rs->sr_err = test_filter( op, entry, op->ors_filter );
+
+			if( rs->sr_err == LDAP_COMPARE_TRUE ) {
+				/* note: we set no limits because either
+				 * no limit is specified, or at least 1
+				 * is specified, and we're going to return
+				 * at most one entry */			
+				op->ors_slimit = SLAP_NO_LIMIT;
+				op->ors_tlimit = SLAP_NO_LIMIT;
+
+				rs->sr_entry = entry;
+				rs->sr_attrs = op->ors_attrs;
+				rs->sr_operational_attrs = NULL;
+				rs->sr_flags = 0;
+				send_search_entry( op, rs );
+				rs->sr_entry = NULL;
+				rs->sr_operational_attrs = NULL;
+			}
+			rs->sr_err = LDAP_SUCCESS;
+fail1:
+			entry_free( entry );
+			send_ldap_result( op, rs );
+			goto return_results;
+		}
+	}
+
+	if( BER_BVISEMPTY( &op->o_req_ndn ) && !BER_BVISEMPTY( &default_search_nbase ) ) {
+		slap_sl_free( op->o_req_dn.bv_val, op->o_tmpmemctx );
+		slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+
+		ber_dupbv_x( &op->o_req_dn, &default_search_base, op->o_tmpmemctx );
+		ber_dupbv_x( &op->o_req_ndn, &default_search_nbase, op->o_tmpmemctx );
+	}
+
+	/*
+	 * We could be serving multiple database backends.  Select the
+	 * appropriate one, or send a referral to our "referral server"
+	 * if we don't hold it.
+	 */
+
+	op->o_bd = select_backend( &op->o_req_ndn, 1 );
+	if ( op->o_bd == NULL ) {
+		rs->sr_ref = referral_rewrite( default_referral,
+			NULL, &op->o_req_dn, op->ors_scope );
+
+		if (!rs->sr_ref) rs->sr_ref = default_referral;
+		rs->sr_err = LDAP_REFERRAL;
+		op->o_bd = bd;
+		send_ldap_result( op, rs );
+
+		if (rs->sr_ref != default_referral)
+		ber_bvarray_free( rs->sr_ref );
+		rs->sr_ref = NULL;
+		goto return_results;
+	}
+
+	/* check restrictions */
+	if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+		send_ldap_result( op, rs );
+		goto return_results;
+	}
+
+	/* check for referrals */
+	if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
+		goto return_results;
+	}
+
+	if ( SLAP_SHADOW(op->o_bd) && get_dontUseCopy(op) ) {
+		/* don't use shadow copy */
+		BerVarray defref = op->o_bd->be_update_refs
+			? op->o_bd->be_update_refs : default_referral;
+
+		if( defref != NULL ) {
+			rs->sr_ref = referral_rewrite( defref,
+				NULL, &op->o_req_dn, op->ors_scope );
+			if( !rs->sr_ref) rs->sr_ref = defref;
+			rs->sr_err = LDAP_REFERRAL;
+			send_ldap_result( op, rs );
+
+			if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
+
+		} else {
+			send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+				"copy not used; no referral information available" );
+		}
+
+	} else if ( op->o_bd->be_search ) {
+		if ( limits_check( op, rs ) == 0 ) {
+			/* actually do the search and send the result(s) */
+			(op->o_bd->be_search)( op, rs );
+		}
+		/* else limits_check() sends error */
+
+	} else {
+		send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+			"operation not supported within namingContext" );
+	}
+
+return_results:;
+	op->o_bd = bd;
+	return rs->sr_err;
+}
+