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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.org.apache.xerces.internal.utils;
import com.sun.org.apache.xerces.internal.impl.Constants;
import javax.xml.XMLConstants;
/**
* This class manages security related properties
*
*/
public final class XMLSecurityPropertyManager {
/**
* States of the settings of a property, in the order: default value, value
* set by FEATURE_SECURE_PROCESSING, jaxp.properties file, jaxp system
* properties, and jaxp api properties
*/
public static enum State {
//this order reflects the overriding order
DEFAULT, FSP, JAXPDOTPROPERTIES, SYSTEMPROPERTY, APIPROPERTY
}
/**
* Limits managed by the security manager
*/
public static enum Property {
ACCESS_EXTERNAL_DTD(XMLConstants.ACCESS_EXTERNAL_DTD,
Constants.EXTERNAL_ACCESS_DEFAULT),
ACCESS_EXTERNAL_SCHEMA(XMLConstants.ACCESS_EXTERNAL_SCHEMA,
Constants.EXTERNAL_ACCESS_DEFAULT);
final String name;
final String defaultValue;
Property(String name, String value) {
this.name = name;
this.defaultValue = value;
}
public boolean equalsName(String propertyName) {
return (propertyName == null) ? false : name.equals(propertyName);
}
String defaultValue() {
return defaultValue;
}
}
/**
* Values of the properties as defined in enum Properties
*/
private final String[] values;
/**
* States of the settings for each property in Properties above
*/
private State[] states = {State.DEFAULT, State.DEFAULT};
/**
* Default constructor. Establishes default values
*/
public XMLSecurityPropertyManager() {
values = new String[Property.values().length];
for (Property property : Property.values()) {
values[property.ordinal()] = property.defaultValue();
}
//read system properties or jaxp.properties
readSystemProperties();
}
/**
* Set limit by property name and state
* @param propertyName property name
* @param state the state of the property
* @param value the value of the property
* @return true if the property is managed by the security property manager;
* false if otherwise.
*/
public boolean setValue(String propertyName, State state, Object value) {
int index = getIndex(propertyName);
if (index > -1) {
setValue(index, state, (String)value);
return true;
}
return false;
}
/**
* Set the value for a specific property.
*
* @param property the property
* @param state the state of the property
* @param value the value of the property
*/
public void setValue(Property property, State state, String value) {
//only update if it shall override
if (state.compareTo(states[property.ordinal()]) >= 0) {
values[property.ordinal()] = value;
states[property.ordinal()] = state;
}
}
/**
* Set the value of a property by its index
* @param index the index of the property
* @param state the state of the property
* @param value the value of the property
*/
public void setValue(int index, State state, String value) {
//only update if it shall override
if (state.compareTo(states[index]) >= 0) {
values[index] = value;
states[index] = state;
}
}
/**
* Return the value of the specified property
*
* @param propertyName the property name
* @return the value of the property as a string
*/
public String getValue(String propertyName) {
int index = getIndex(propertyName);
if (index > -1) {
return getValueByIndex(index);
}
return null;
}
/**
* Return the value of the specified property
*
* @param property the property
* @return the value of the property
*/
public String getValue(Property property) {
return values[property.ordinal()];
}
/**
* Return the value of a property by its ordinal
* @param index the index of a property
* @return value of a property
*/
public String getValueByIndex(int index) {
return values[index];
}
/**
* Get the index by property name
* @param propertyName property name
* @return the index of the property if found; return -1 if not
*/
public int getIndex(String propertyName){
for (Property property : Property.values()) {
if (property.equalsName(propertyName)) {
//internally, ordinal is used as index
return property.ordinal();
}
}
return -1;
}
/**
* Read from system properties, or those in jaxp.properties
*/
private void readSystemProperties() {
getSystemProperty(Property.ACCESS_EXTERNAL_DTD,
Constants.SP_ACCESS_EXTERNAL_DTD);
getSystemProperty(Property.ACCESS_EXTERNAL_SCHEMA,
Constants.SP_ACCESS_EXTERNAL_SCHEMA);
}
/**
* Read from system properties, or those in jaxp.properties
*
* @param property the property
* @param systemProperty the name of the system property
*/
private void getSystemProperty(Property property, String systemProperty) {
try {
String value = SecuritySupport.getSystemProperty(systemProperty);
if (value != null) {
values[property.ordinal()] = value;
states[property.ordinal()] = State.SYSTEMPROPERTY;
return;
}
value = SecuritySupport.readJAXPProperty(systemProperty);
if (value != null) {
values[property.ordinal()] = value;
states[property.ordinal()] = State.JAXPDOTPROPERTIES;
}
} catch (NumberFormatException e) {
//invalid setting ignored
}
}
}
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