/*
* Copyright (c) 1997, 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.
*
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package sun.security.x509;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.security.cert.CRLException;
import java.security.cert.CertificateException;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Map;
import java.util.TreeMap;
import sun.security.util.*;
/**
* This class defines the CRL Extensions.
* It is used for both CRL Extensions and CRL Entry Extensions,
* which are defined are follows:
* <pre>
* TBSCertList ::= SEQUENCE {
* version Version OPTIONAL, -- if present, must be v2
* signature AlgorithmIdentifier,
* issuer Name,
* thisUpdate Time,
* nextUpdate Time OPTIONAL,
* revokedCertificates SEQUENCE OF SEQUENCE {
* userCertificate CertificateSerialNumber,
* revocationDate Time,
* crlEntryExtensions Extensions OPTIONAL -- if present, must be v2
* } OPTIONAL,
* crlExtensions [0] EXPLICIT Extensions OPTIONAL -- if present, must be v2
* }
* </pre>
*
* @author Hemma Prafullchandra
*/
public class CRLExtensions {
private Map<String,Extension> map = Collections.synchronizedMap(
new TreeMap<String,Extension>());
private boolean unsupportedCritExt = false;
/**
* Default constructor.
*/
public CRLExtensions() { }
/**
* Create the object, decoding the values from the passed DER stream.
*
* @param in the DerInputStream to read the Extension from, i.e. the
* sequence of extensions.
* @exception CRLException on decoding errors.
*/
public CRLExtensions(DerInputStream in) throws CRLException {
init(in);
}
// helper routine
private void init(DerInputStream derStrm) throws CRLException {
try {
DerInputStream str = derStrm;
byte nextByte = (byte)derStrm.peekByte();
// check for context specific byte 0; skip it
if (((nextByte & 0x0c0) == 0x080) &&
((nextByte & 0x01f) == 0x000)) {
DerValue val = str.getDerValue();
str = val.data;
}
DerValue[] exts = str.getSequence(5);
for (int i = 0; i < exts.length; i++) {
Extension ext = new Extension(exts[i]);
parseExtension(ext);
}
} catch (IOException e) {
throw new CRLException("Parsing error: " + e.toString());
}
}
private static final Class<?>[] PARAMS = {Boolean.class, Object.class};
// Parse the encoded extension
private void parseExtension(Extension ext) throws CRLException {
try {
Class<?> extClass = OIDMap.getClass(ext.getExtensionId());
if (extClass == null) { // Unsupported extension
if (ext.isCritical())
unsupportedCritExt = true;
if (map.put(ext.getExtensionId().toString(), ext) != null)
throw new CRLException("Duplicate extensions not allowed");
return;
}
Constructor<?> cons = extClass.getConstructor(PARAMS);
Object[] passed = new Object[] {Boolean.valueOf(ext.isCritical()),
ext.getExtensionValue()};
CertAttrSet<?> crlExt = (CertAttrSet<?>)cons.newInstance(passed);
if (map.put(crlExt.getName(), (Extension)crlExt) != null) {
throw new CRLException("Duplicate extensions not allowed");
}
} catch (InvocationTargetException invk) {
throw new CRLException(invk.getTargetException().getMessage());
} catch (Exception e) {
throw new CRLException(e.toString());
}
}
/**
* Encode the extensions in DER form to the stream.
*
* @param out the DerOutputStream to marshal the contents to.
* @param isExplicit the tag indicating whether this is an entry
* extension (false) or a CRL extension (true).
* @exception CRLException on encoding errors.
*/
public void encode(OutputStream out, boolean isExplicit)
throws CRLException {
try {
DerOutputStream extOut = new DerOutputStream();
Collection<Extension> allExts = map.values();
Object[] objs = allExts.toArray();
for (int i = 0; i < objs.length; i++) {
if (objs[i] instanceof CertAttrSet)
((CertAttrSet)objs[i]).encode(extOut);
else if (objs[i] instanceof Extension)
((Extension)objs[i]).encode(extOut);
else
throw new CRLException("Illegal extension object");
}
DerOutputStream seq = new DerOutputStream();
seq.write(DerValue.tag_Sequence, extOut);
DerOutputStream tmp = new DerOutputStream();
if (isExplicit)
tmp.write(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte)0), seq);
else
tmp = seq;
out.write(tmp.toByteArray());
} catch (IOException e) {
throw new CRLException("Encoding error: " + e.toString());
} catch (CertificateException e) {
throw new CRLException("Encoding error: " + e.toString());
}
}
/**
* Get the extension with this alias.
*
* @param alias the identifier string for the extension to retrieve.
*/
public Extension get(String alias) {
X509AttributeName attr = new X509AttributeName(alias);
String name;
String id = attr.getPrefix();
if (id.equalsIgnoreCase(X509CertImpl.NAME)) { // fully qualified
int index = alias.lastIndexOf('.');
name = alias.substring(index + 1);
} else
name = alias;
return map.get(name);
}
/**
* Set the extension value with this alias.
*
* @param alias the identifier string for the extension to set.
* @param obj the Object to set the extension identified by the
* alias.
*/
public void set(String alias, Object obj) {
map.put(alias, (Extension)obj);
}
/**
* Delete the extension value with this alias.
*
* @param alias the identifier string for the extension to delete.
*/
public void delete(String alias) {
map.remove(alias);
}
/**
* Return an enumeration of the extensions.
* @return an enumeration of the extensions in this CRL.
*/
public Enumeration<Extension> getElements() {
return Collections.enumeration(map.values());
}
/**
* Return a collection view of the extensions.
* @return a collection view of the extensions in this CRL.
*/
public Collection<Extension> getAllExtensions() {
return map.values();
}
/**
* Return true if a critical extension is found that is
* not supported, otherwise return false.
*/
public boolean hasUnsupportedCriticalExtension() {
return unsupportedCritExt;
}
/**
* Compares this CRLExtensions for equality with the specified
* object. If the {@code other} object is an
* {@code instanceof} {@code CRLExtensions}, then
* all the entries are compared with the entries from this.
*
* @param other the object to test for equality with this CRLExtensions.
* @return true iff all the entries match that of the Other,
* false otherwise.
*/
public boolean equals(Object other) {
if (this == other)
return true;
if (!(other instanceof CRLExtensions))
return false;
Collection<Extension> otherC =
((CRLExtensions)other).getAllExtensions();
Object[] objs = otherC.toArray();
int len = objs.length;
if (len != map.size())
return false;
Extension otherExt, thisExt;
String key = null;
for (int i = 0; i < len; i++) {
if (objs[i] instanceof CertAttrSet)
key = ((CertAttrSet)objs[i]).getName();
otherExt = (Extension)objs[i];
if (key == null)
key = otherExt.getExtensionId().toString();
thisExt = map.get(key);
if (thisExt == null)
return false;
if (! thisExt.equals(otherExt))
return false;
}
return true;
}
/**
* Returns a hashcode value for this CRLExtensions.
*
* @return the hashcode value.
*/
public int hashCode() {
return map.hashCode();
}
/**
* Returns a string representation of this {@code CRLExtensions} object
* in the form of a set of entries, enclosed in braces and separated
* by the ASCII characters "<code>, </code>" (comma and space).
* <p>Overrides to {@code toString} method of {@code Object}.
*
* @return a string representation of this CRLExtensions.
*/
public String toString() {
return map.toString();
}
}