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//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.policy;
import java.io.File;
import java.security.KeyStore;
import java.security.Principal;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.Map;
public class PolicyContext
{
private Map<String, String> properties = new HashMap<String, String>();
private Principal[] principals;
private KeyStore keystore;
public PolicyContext()
{
// special property case for resolving ${/} to native separator
properties.put( "/", File.separator );
}
public void addProperty( String name, String value )
{
this.properties.put( name, value );
}
public void setProperties( Map<String,String> properties )
{
this.properties.putAll( properties );
}
public KeyStore getKeystore()
{
return keystore;
}
public void setKeystore( KeyStore keystore )
{
this.keystore = keystore;
}
public Principal[] getPrincipals()
{
return principals;
}
public void setPrincipals( Principal[] principals )
{
this.principals = principals;
}
public String evaluate(String s) throws PolicyException
{
s = processProtocols( s );
int i1=0;
int i2=0;
while (s!=null)
{
i1=s.indexOf("${");
if (i1<0)
{
break;
}
i2=s.indexOf("}",i1+2);
if (i2<0)
{
break;
}
String property=getProperty(s.substring(i1+2,i2));
s=s.substring(0,i1)+property+s.substring(i2+1);
}
return s;
}
private String processProtocols( String s ) throws PolicyException
{
int i1=0;
int i2=0;
while (s!=null)
{
i1=s.indexOf("${{");
if (i1<0)
{
break;
}
i2=s.indexOf("}}",i1+2);
if (i2<0)
{
break;
}
String property;
String target = s.substring(i1+3,i2);
if ( target.indexOf( ":" ) >= 0 )
{
String[] resolve = target.split( ":" );
property = resolve(resolve[0], resolve[1] );
}
else
{
property = resolve( target, null );
}
s=s.substring(0,i1)+property+s.substring(i2+2);
}
return s;
}
public String getProperty(String name)
{
if (properties.containsKey(name))
{
return properties.get(name);
}
return System.getProperty(name);
}
private String resolve( String protocol, String data ) throws PolicyException
{
if ( "self".equals( protocol ) )
{
// need expanding to list of principals in grant clause
if ( principals != null && principals.length != 0 )
{
StringBuilder sb = new StringBuilder();
for ( int i = 0; i < principals.length; ++i )
{
sb.append( principals[i].getClass().getName() );
sb.append( " \"" );
sb.append( principals[i].getName() );
sb.append( "\" " );
}
return sb.toString();
}
else
{
throw new PolicyException( "self can not be expanded, missing principals" );
}
}
if ( "alias".equals( protocol ) )
{
try
{
Certificate cert = keystore.getCertificate(data);
if ( cert instanceof X509Certificate )
{
Principal principal = ((X509Certificate) cert).getSubjectX500Principal();
StringBuilder sb = new StringBuilder();
sb.append( principal.getClass().getName() );
sb.append( " \"" );
sb.append( principal.getName() );
sb.append( "\" " );
return sb.toString();
}
else
{
throw new PolicyException( "alias can not be expanded, bad cert" );
}
}
catch ( Exception e )
{
throw new PolicyException( "alias can not be expanded: " + data );
}
}
throw new PolicyException( "unknown protocol: " + protocol );
}
}
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