300 lines
10 KiB
Java
300 lines
10 KiB
Java
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.x509;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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import java.security.cert.CRLException;
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import java.security.cert.CertificateException;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.Map;
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import java.util.TreeMap;
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import sun.security.util.*;
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/**
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* This class defines the CRL Extensions.
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* It is used for both CRL Extensions and CRL Entry Extensions,
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* which are defined are follows:
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* <pre>
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* TBSCertList ::= SEQUENCE {
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* version Version OPTIONAL, -- if present, must be v2
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* signature AlgorithmIdentifier,
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* issuer Name,
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* thisUpdate Time,
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* nextUpdate Time OPTIONAL,
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* revokedCertificates SEQUENCE OF SEQUENCE {
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* userCertificate CertificateSerialNumber,
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* revocationDate Time,
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* crlEntryExtensions Extensions OPTIONAL -- if present, must be v2
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* } OPTIONAL,
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* crlExtensions [0] EXPLICIT Extensions OPTIONAL -- if present, must be v2
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* }
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* </pre>
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*
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* @author Hemma Prafullchandra
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*/
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public class CRLExtensions {
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private Map<String,Extension> map = Collections.synchronizedMap(
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new TreeMap<String,Extension>());
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private boolean unsupportedCritExt = false;
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/**
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* Default constructor.
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*/
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public CRLExtensions() { }
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/**
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* Create the object, decoding the values from the passed DER stream.
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*
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* @param in the DerInputStream to read the Extension from, i.e. the
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* sequence of extensions.
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* @exception CRLException on decoding errors.
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*/
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public CRLExtensions(DerInputStream in) throws CRLException {
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init(in);
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}
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// helper routine
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private void init(DerInputStream derStrm) throws CRLException {
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try {
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DerInputStream str = derStrm;
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byte nextByte = (byte)derStrm.peekByte();
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// check for context specific byte 0; skip it
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if (((nextByte & 0x0c0) == 0x080) &&
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((nextByte & 0x01f) == 0x000)) {
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DerValue val = str.getDerValue();
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str = val.data;
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}
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DerValue[] exts = str.getSequence(5);
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for (int i = 0; i < exts.length; i++) {
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Extension ext = new Extension(exts[i]);
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parseExtension(ext);
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}
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} catch (IOException e) {
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throw new CRLException("Parsing error: " + e.toString());
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}
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}
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private static final Class[] PARAMS = {Boolean.class, Object.class};
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// Parse the encoded extension
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private void parseExtension(Extension ext) throws CRLException {
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try {
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Class<?> extClass = OIDMap.getClass(ext.getExtensionId());
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if (extClass == null) { // Unsupported extension
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if (ext.isCritical())
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unsupportedCritExt = true;
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if (map.put(ext.getExtensionId().toString(), ext) != null)
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throw new CRLException("Duplicate extensions not allowed");
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return;
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}
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Constructor<?> cons = extClass.getConstructor(PARAMS);
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Object[] passed = new Object[] {Boolean.valueOf(ext.isCritical()),
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ext.getExtensionValue()};
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CertAttrSet<?> crlExt = (CertAttrSet<?>)cons.newInstance(passed);
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if (map.put(crlExt.getName(), (Extension)crlExt) != null) {
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throw new CRLException("Duplicate extensions not allowed");
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}
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} catch (InvocationTargetException invk) {
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throw new CRLException(invk.getTargetException().getMessage());
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} catch (Exception e) {
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throw new CRLException(e.toString());
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}
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}
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/**
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* Encode the extensions in DER form to the stream.
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*
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* @param out the DerOutputStream to marshal the contents to.
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* @param isExplicit the tag indicating whether this is an entry
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* extension (false) or a CRL extension (true).
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* @exception CRLException on encoding errors.
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*/
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public void encode(OutputStream out, boolean isExplicit)
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throws CRLException {
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try {
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DerOutputStream extOut = new DerOutputStream();
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Collection<Extension> allExts = map.values();
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Object[] objs = allExts.toArray();
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for (int i = 0; i < objs.length; i++) {
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if (objs[i] instanceof CertAttrSet)
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((CertAttrSet)objs[i]).encode(extOut);
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else if (objs[i] instanceof Extension)
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((Extension)objs[i]).encode(extOut);
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else
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throw new CRLException("Illegal extension object");
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}
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DerOutputStream seq = new DerOutputStream();
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seq.write(DerValue.tag_Sequence, extOut);
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DerOutputStream tmp = new DerOutputStream();
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if (isExplicit)
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tmp.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte)0), seq);
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else
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tmp = seq;
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out.write(tmp.toByteArray());
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} catch (IOException e) {
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throw new CRLException("Encoding error: " + e.toString());
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} catch (CertificateException e) {
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throw new CRLException("Encoding error: " + e.toString());
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}
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}
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/**
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* Get the extension with this alias.
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*
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* @param alias the identifier string for the extension to retrieve.
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*/
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public Extension get(String alias) {
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X509AttributeName attr = new X509AttributeName(alias);
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String name;
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String id = attr.getPrefix();
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if (id.equalsIgnoreCase(X509CertImpl.NAME)) { // fully qualified
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int index = alias.lastIndexOf(".");
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name = alias.substring(index + 1);
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} else
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name = alias;
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return map.get(name);
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}
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/**
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* Set the extension value with this alias.
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*
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* @param alias the identifier string for the extension to set.
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* @param obj the Object to set the extension identified by the
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* alias.
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*/
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public void set(String alias, Object obj) {
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map.put(alias, (Extension)obj);
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}
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/**
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* Delete the extension value with this alias.
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*
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* @param alias the identifier string for the extension to delete.
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*/
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public void delete(String alias) {
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map.remove(alias);
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}
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/**
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* Return an enumeration of the extensions.
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* @return an enumeration of the extensions in this CRL.
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*/
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public Enumeration<Extension> getElements() {
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return Collections.enumeration(map.values());
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}
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/**
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* Return a collection view of the extensions.
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* @return a collection view of the extensions in this CRL.
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*/
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public Collection<Extension> getAllExtensions() {
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return map.values();
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}
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/**
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* Return true if a critical extension is found that is
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* not supported, otherwise return false.
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*/
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public boolean hasUnsupportedCriticalExtension() {
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return unsupportedCritExt;
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}
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/**
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* Compares this CRLExtensions for equality with the specified
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* object. If the <code>other</code> object is an
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* <code>instanceof</code> <code>CRLExtensions</code>, then
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* all the entries are compared with the entries from this.
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*
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* @param other the object to test for equality with this CRLExtensions.
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* @return true iff all the entries match that of the Other,
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* false otherwise.
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*/
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public boolean equals(Object other) {
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if (this == other)
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return true;
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if (!(other instanceof CRLExtensions))
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return false;
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Collection<Extension> otherC =
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((CRLExtensions)other).getAllExtensions();
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Object[] objs = otherC.toArray();
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int len = objs.length;
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if (len != map.size())
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return false;
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Extension otherExt, thisExt;
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String key = null;
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for (int i = 0; i < len; i++) {
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if (objs[i] instanceof CertAttrSet)
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key = ((CertAttrSet)objs[i]).getName();
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otherExt = (Extension)objs[i];
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if (key == null)
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key = otherExt.getExtensionId().toString();
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thisExt = map.get(key);
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if (thisExt == null)
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return false;
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if (! thisExt.equals(otherExt))
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return false;
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}
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return true;
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}
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/**
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* Returns a hashcode value for this CRLExtensions.
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*
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* @return the hashcode value.
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*/
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public int hashCode() {
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return map.hashCode();
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}
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/**
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* Returns a string representation of this <tt>CRLExtensions</tt> object
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* in the form of a set of entries, enclosed in braces and separated
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* by the ASCII characters "<tt>, </tt>" (comma and space).
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* <p>Overrides to <tt>toString</tt> method of <tt>Object</tt>.
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*
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* @return a string representation of this CRLExtensions.
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*/
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public String toString() {
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return map.toString();
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}
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}
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