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ProcedureConfig.java
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ProcedureConfig.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.proc;
import java.time.ZoneId;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.configuration.Config;
import static java.time.ZoneOffset.UTC;
import static java.util.Arrays.stream;
public class ProcedureConfig
{
public static final String PROC_ALLOWED_SETTING_DEFAULT_NAME = "dbms.security.procedures.default_allowed";
public static final String PROC_ALLOWED_SETTING_ROLES = "dbms.security.procedures.roles";
private static final String ROLES_DELIMITER = ",";
private static final String SETTING_DELIMITER = ";";
private static final String MAPPING_DELIMITER = ":";
private static final String PROCEDURE_DELIMITER = ",";
private final String defaultValue;
private final List<ProcMatcher> matchers;
private final List<Pattern> accessPatterns;
private final List<Pattern> whiteList;
private final ZoneId defaultTemporalTimeZone;
private ProcedureConfig()
{
this.defaultValue = "";
this.matchers = Collections.emptyList();
this.accessPatterns = Collections.emptyList();
this.whiteList = Collections.singletonList( compilePattern( "*" ) );
this.defaultTemporalTimeZone = UTC;
}
public ProcedureConfig( Config config )
{
this.defaultValue = config.getValue( PROC_ALLOWED_SETTING_DEFAULT_NAME )
.map( Object::toString )
.orElse( "" );
String allowedRoles = config.getValue( PROC_ALLOWED_SETTING_ROLES ).map( Object::toString )
.orElse( "" );
this.matchers = Stream.of( allowedRoles.split( SETTING_DELIMITER ) )
.map( procToRoleSpec -> procToRoleSpec.split( MAPPING_DELIMITER ) )
.filter( spec -> spec.length > 1 )
.map( spec ->
{
String[] roles =
stream( spec[1].split( ROLES_DELIMITER ) ).map( String::trim ).toArray( String[]::new );
return new ProcMatcher( spec[0].trim(), roles );
} ).collect( Collectors.toList() );
this.accessPatterns =
parseMatchers( GraphDatabaseSettings.procedure_unrestricted.name(), config, PROCEDURE_DELIMITER,
ProcedureConfig::compilePattern );
this.whiteList =
parseMatchers( GraphDatabaseSettings.procedure_whitelist.name(), config, PROCEDURE_DELIMITER,
ProcedureConfig::compilePattern );
this.defaultTemporalTimeZone = config.get( GraphDatabaseSettings.db_temporal_timezone );
}
private <T> List<T> parseMatchers( String configName, Config config, String delimiter, Function<String,T>
matchFunc )
{
String fullAccessProcedures = config.getValue( configName ).map( Object::toString ).orElse( "" );
if ( fullAccessProcedures.isEmpty() )
{
return Collections.emptyList();
}
else
{
return Stream.of( fullAccessProcedures.split( delimiter ) ).map( matchFunc )
.collect( Collectors.toList() );
}
}
String[] rolesFor( String procedureName )
{
String[] wildCardRoles = matchers.stream().filter( matcher -> matcher.matches( procedureName ) )
.map( ProcMatcher::roles ).reduce( new String[0],
( acc, next ) -> Stream.concat( stream( acc ), stream( next ) ).toArray( String[]::new ) );
if ( wildCardRoles.length > 0 )
{
return wildCardRoles;
}
else
{
return getDefaultValue();
}
}
boolean fullAccessFor( String procedureName )
{
return accessPatterns.stream().anyMatch( pattern -> pattern.matcher( procedureName ).matches() );
}
boolean isWhitelisted( String procedureName )
{
return whiteList.stream().anyMatch( pattern -> pattern.matcher( procedureName ).matches() );
}
private static Pattern compilePattern( String procedure )
{
procedure = procedure.trim().replaceAll( "([\\[\\]\\\\?()^${}+|.])", "\\\\$1" );
return Pattern.compile( procedure.replaceAll( "\\*", ".*" ) );
}
private String[] getDefaultValue()
{
return defaultValue == null || defaultValue.isEmpty() ? new String[0] : new String[]{defaultValue};
}
static final ProcedureConfig DEFAULT = new ProcedureConfig();
public ZoneId getDefaultTemporalTimeZone()
{
return defaultTemporalTimeZone;
}
private static class ProcMatcher
{
private final Pattern pattern;
private final String[] roles;
private ProcMatcher( String procedurePattern, String[] roles )
{
this.pattern = Pattern.compile( procedurePattern.replaceAll( "\\.", "\\\\." ).replaceAll( "\\*", ".*" ) );
this.roles = roles;
}
boolean matches( String procedureName )
{
return pattern.matcher( procedureName ).matches();
}
String[] roles()
{
return roles;
}
}
}