Adding upstream version 2.4.47+dfsg.upstream/2.4.47+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 409 insertions, 0 deletions

diff --git a/servers/slapd/compare.c b/servers/slapd/compare.c
new file mode 100644
index 0000000..ed35c75
--- /dev/null
+++ b/servers/slapd/compare.c
@@ -0,0 +1,409 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2018 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/socket.h>
+#include <ac/string.h>
+
+#include "slap.h"
+
+int
+do_compare(
+    Operation	*op,
+    SlapReply	*rs )
+{
+	struct berval dn = BER_BVNULL;
+	struct berval desc = BER_BVNULL;
+	struct berval value = BER_BVNULL;
+	AttributeAssertion ava = ATTRIBUTEASSERTION_INIT;
+
+	Debug( LDAP_DEBUG_TRACE, "%s do_compare\n",
+		op->o_log_prefix, 0, 0 );
+	/*
+	 * Parse the compare request.  It looks like this:
+	 *
+	 *	CompareRequest := [APPLICATION 14] SEQUENCE {
+	 *		entry	DistinguishedName,
+	 *		ava	SEQUENCE {
+	 *			type	AttributeType,
+	 *			value	AttributeValue
+	 *		}
+	 *	}
+	 */
+
+	if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_compare: ber_scanf failed\n",
+			op->o_log_prefix, 0, 0 );
+		send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+		return SLAPD_DISCONNECT;
+	}
+
+	if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_compare: get ava failed\n",
+			op->o_log_prefix, 0, 0 );
+		send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+		return SLAPD_DISCONNECT;
+	}
+
+	if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_compare: ber_scanf failed\n",
+			op->o_log_prefix, 0, 0 );
+		send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+		return SLAPD_DISCONNECT;
+	}
+
+	if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_compare: get_ctrls failed\n",
+			op->o_log_prefix, 0, 0 );
+		goto cleanup;
+	} 
+
+	rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
+		op->o_tmpmemctx );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s do_compare: invalid dn (%s)\n",
+			op->o_log_prefix, dn.bv_val, 0 );
+		send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
+		goto cleanup;
+	}
+
+	Statslog( LDAP_DEBUG_STATS,
+		"%s CMP dn=\"%s\" attr=\"%s\"\n",
+		op->o_log_prefix, op->o_req_dn.bv_val,
+		desc.bv_val, 0, 0 );
+
+	rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		rs->sr_err = slap_bv2undef_ad( &desc, &ava.aa_desc,
+				&rs->sr_text,
+				SLAP_AD_PROXIED|SLAP_AD_NOINSERT );
+		if( rs->sr_err != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			goto cleanup;
+		}
+	}
+
+	rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
+		ava.aa_desc->ad_type->sat_equality,
+		SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
+		&value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		send_ldap_result( op, rs );
+		goto cleanup;
+	}
+
+	op->orc_ava = &ava;
+
+	Debug( LDAP_DEBUG_ARGS,
+		"do_compare: dn (%s) attr (%s) value (%s)\n",
+		op->o_req_dn.bv_val,
+		ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
+
+	op->o_bd = frontendDB;
+	rs->sr_err = frontendDB->be_compare( op, rs );
+
+cleanup:;
+	op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
+	op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+	if ( !BER_BVISNULL( &ava.aa_value ) ) {
+		op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
+	}
+
+	return rs->sr_err;
+}
+
+int
+fe_op_compare( Operation *op, SlapReply *rs )
+{
+	Entry			*entry = NULL;
+	AttributeAssertion	*ava = op->orc_ava;
+	BackendDB		*bd = op->o_bd;
+
+	if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
+		if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			goto cleanup;
+		}
+
+		rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
+		if( rs->sr_err != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			goto cleanup;
+		}
+
+	} else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
+		if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			rs->sr_err = 0;
+			goto cleanup;
+		}
+
+		rs->sr_err = schema_info( &entry, &rs->sr_text );
+		if( rs->sr_err != LDAP_SUCCESS ) {
+			send_ldap_result( op, rs );
+			rs->sr_err = 0;
+			goto cleanup;
+		}
+	}
+
+	if( entry ) {
+		rs->sr_err = slap_compare_entry( op, entry, ava );
+		entry_free( entry );
+
+		send_ldap_result( op, rs );
+
+		if( rs->sr_err == LDAP_COMPARE_TRUE ||
+			rs->sr_err == LDAP_COMPARE_FALSE )
+		{
+			rs->sr_err = LDAP_SUCCESS;
+		}
+
+		goto cleanup;
+	}
+
+	/*
+	 * 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, 0 );
+	if ( op->o_bd == NULL ) {
+		rs->sr_ref = referral_rewrite( default_referral,
+			NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+
+		rs->sr_err = LDAP_REFERRAL;
+		if (!rs->sr_ref) rs->sr_ref = default_referral;
+		op->o_bd = bd;
+		send_ldap_result( op, rs );
+
+		if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
+		rs->sr_err = 0;
+		goto cleanup;
+	}
+
+	/* check restrictions */
+	if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+		send_ldap_result( op, rs );
+		goto cleanup;
+	}
+
+	/* check for referrals */
+	if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
+		goto cleanup;
+	}
+
+	if ( SLAP_SHADOW(op->o_bd) && get_dontUseCopy(op) ) {
+		/* don't use shadow copy */
+		send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+			"copy not used" );
+
+	} else if ( ava->aa_desc == slap_schema.si_ad_entryDN ) {
+		send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+			"entryDN compare not supported" );
+
+	} else if ( ava->aa_desc == slap_schema.si_ad_subschemaSubentry ) {
+		send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+			"subschemaSubentry compare not supported" );
+
+#ifndef SLAP_COMPARE_IN_FRONTEND
+	} else if ( ava->aa_desc == slap_schema.si_ad_hasSubordinates
+		&& op->o_bd->be_has_subordinates )
+	{
+		int	rc, hasSubordinates = LDAP_SUCCESS;
+
+		rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &entry );
+		if ( rc == 0 && entry ) {
+			if ( ! access_allowed( op, entry,
+				ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
+			{	
+				rc = rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+				
+			} else {
+				rc = rs->sr_err = op->o_bd->be_has_subordinates( op,
+						entry, &hasSubordinates );
+				be_entry_release_r( op, entry );
+			}
+		}
+
+		if ( rc == 0 ) {
+			int	asserted;
+
+			asserted = bvmatch( &ava->aa_value, &slap_true_bv )
+				? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
+			if ( hasSubordinates == asserted ) {
+				rs->sr_err = LDAP_COMPARE_TRUE;
+
+			} else {
+				rs->sr_err = LDAP_COMPARE_FALSE;
+			}
+
+		} else {
+			/* return error only if "disclose"
+			 * is granted on the object */
+			if ( backend_access( op, NULL, &op->o_req_ndn,
+					slap_schema.si_ad_entry,
+					NULL, ACL_DISCLOSE, NULL ) == LDAP_INSUFFICIENT_ACCESS )
+			{
+				rs->sr_err = LDAP_NO_SUCH_OBJECT;
+			}
+		}
+
+		send_ldap_result( op, rs );
+
+		if ( rc == 0 ) {
+			rs->sr_err = LDAP_SUCCESS;
+		}
+
+	} else if ( op->o_bd->be_compare ) {
+		rs->sr_err = op->o_bd->be_compare( op, rs );
+
+#endif /* ! SLAP_COMPARE_IN_FRONTEND */
+	} else {
+		rs->sr_err = SLAP_CB_CONTINUE;
+	}
+
+	if ( rs->sr_err == SLAP_CB_CONTINUE ) {
+		/* do our best to compare that AVA
+		 * 
+		 * NOTE: this code is used only
+		 * if SLAP_COMPARE_IN_FRONTEND 
+		 * is #define'd (it's not by default)
+		 * or if op->o_bd->be_compare is NULL.
+		 * 
+		 * FIXME: one potential issue is that
+		 * if SLAP_COMPARE_IN_FRONTEND overlays
+		 * are not executed for compare. */
+		BerVarray	vals = NULL;
+		int		rc = LDAP_OTHER;
+
+		rs->sr_err = backend_attribute( op, NULL, &op->o_req_ndn,
+				ava->aa_desc, &vals, ACL_COMPARE );
+		switch ( rs->sr_err ) {
+		default:
+			/* return error only if "disclose"
+			 * is granted on the object */
+			if ( backend_access( op, NULL, &op->o_req_ndn,
+					slap_schema.si_ad_entry,
+					NULL, ACL_DISCLOSE, NULL )
+					== LDAP_INSUFFICIENT_ACCESS )
+			{
+				rs->sr_err = LDAP_NO_SUCH_OBJECT;
+			}
+			break;
+
+		case LDAP_SUCCESS:
+			if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
+				SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+					SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+				vals, &ava->aa_value, op->o_tmpmemctx ) == 0 )
+			{
+				rs->sr_err = LDAP_COMPARE_TRUE;
+				break;
+
+			} else {
+				rs->sr_err = LDAP_COMPARE_FALSE;
+			}
+			rc = LDAP_SUCCESS;
+			break;
+		}
+
+		send_ldap_result( op, rs );
+
+		if ( rc == 0 ) {
+			rs->sr_err = LDAP_SUCCESS;
+		}
+		
+		if ( vals ) {
+			ber_bvarray_free_x( vals, op->o_tmpmemctx );
+		}
+	}
+
+cleanup:;
+	op->o_bd = bd;
+	return rs->sr_err;
+}
+
+int slap_compare_entry(
+	Operation *op,
+	Entry *e,
+	AttributeAssertion *ava )
+{
+	int rc = LDAP_COMPARE_FALSE;
+	Attribute *a;
+
+	if ( ! access_allowed( op, e,
+		ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
+	{	
+		rc = LDAP_INSUFFICIENT_ACCESS;
+		goto done;
+	}
+
+	if ( get_assert( op ) &&
+		( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
+	{
+		rc = LDAP_ASSERTION_FAILED;
+		goto done;
+	}
+
+	a = attrs_find( e->e_attrs, ava->aa_desc );
+	if( a == NULL ) {
+		rc = LDAP_NO_SUCH_ATTRIBUTE;
+		goto done;
+	}
+
+	for(;
+		a != NULL;
+		a = attrs_find( a->a_next, ava->aa_desc ))
+	{
+		if (( ava->aa_desc != a->a_desc ) && ! access_allowed( op,
+			e, a->a_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
+		{	
+			rc = LDAP_INSUFFICIENT_ACCESS;
+			break;
+		}
+
+		if ( attr_valfind( a, 
+			SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+				SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+			&ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
+		{
+			rc = LDAP_COMPARE_TRUE;
+			break;
+		}
+	}
+
+done:
+	if( rc != LDAP_COMPARE_TRUE && rc != LDAP_COMPARE_FALSE ) {
+		if ( ! access_allowed( op, e,
+			slap_schema.si_ad_entry, NULL, ACL_DISCLOSE, NULL ) )
+		{
+			rc = LDAP_NO_SUCH_OBJECT;
+		}
+	}
+
+	return rc;
+}