/*
* Copyright (c) 1997, 2006, 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
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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.Field;
import java.lang.reflect.InvocationTargetException;
import java.security.cert.CertificateException;
import java.util.*;
import sun.misc.HexDumpEncoder;
import sun.security.util.*;
/**
* This class defines the Extensions attribute for the Certificate.
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @see CertAttrSet
*/
public class CertificateExtensions implements CertAttrSet<Extension> {
/**
* Identifier for this attribute, to be used with the
* get, set, delete methods of Certificate, x509 type.
*/
public static final String IDENT = "x509.info.extensions";
/**
* name
*/
public static final String NAME = "extensions";
private static final Debug debug = Debug.getInstance("x509");
private Hashtable<String,Extension> map = new Hashtable<String,Extension>();
private boolean unsupportedCritExt = false;
private Map<String,Extension> unparseableExtensions;
/**
* Default constructor.
*/
public CertificateExtensions() { }
/**
* Create the object, decoding the values from the passed DER stream.
*
* @param in the DerInputStream to read the Extension from.
* @exception IOException on decoding errors.
*/
public CertificateExtensions(DerInputStream in) throws IOException {
init(in);
}
// helper routine
private void init(DerInputStream in) throws IOException {
DerValue[] exts = in.getSequence(5);
for (int i = 0; i < exts.length; i++) {
Extension ext = new Extension(exts[i]);
parseExtension(ext);
}
}
private static Class[] PARAMS = {Boolean.class, Object.class};
// Parse the encoded extension
private void parseExtension(Extension ext) throws IOException {
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) {
return;
} else {
throw new IOException("Duplicate extensions not allowed");
}
}
Constructor cons = ((Class<?>)extClass).getConstructor(PARAMS);
Object[] passed = new Object[] {Boolean.valueOf(ext.isCritical()),
ext.getExtensionValue()};
CertAttrSet certExt = (CertAttrSet)cons.newInstance(passed);
if (map.put(certExt.getName(), (Extension)certExt) != null) {
throw new IOException("Duplicate extensions not allowed");
}
} catch (InvocationTargetException invk) {
Throwable e = invk.getTargetException();
if (ext.isCritical() == false) {
// ignore errors parsing non-critical extensions
if (unparseableExtensions == null) {
unparseableExtensions = new HashMap<String,Extension>();
}
unparseableExtensions.put(ext.getExtensionId().toString(),
new UnparseableExtension(ext, e));
if (debug != null) {
debug.println("Error parsing extension: " + ext);
e.printStackTrace();
HexDumpEncoder h = new HexDumpEncoder();
System.err.println(h.encodeBuffer(ext.getExtensionValue()));
}
return;
}
if (e instanceof IOException) {
throw (IOException)e;
} else {
throw (IOException)new IOException(e.toString()).initCause(e);
}
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw (IOException)new IOException(e.toString()).initCause(e);
}
}
/**
* Encode the extensions in DER form to the stream, setting
* the context specific tag as needed in the X.509 v3 certificate.
*
* @param out the DerOutputStream to marshal the contents to.
* @exception CertificateException on encoding errors.
* @exception IOException on errors.
*/
public void encode(OutputStream out)
throws CertificateException, IOException {
encode(out, false);
}
/**
* Encode the extensions in DER form to the stream.
*
* @param out the DerOutputStream to marshal the contents to.
* @param isCertReq if true then no context specific tag is added.
* @exception CertificateException on encoding errors.
* @exception IOException on errors.
*/
public void encode(OutputStream out, boolean isCertReq)
throws CertificateException, IOException {
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 CertificateException("Illegal extension object");
}
DerOutputStream seq = new DerOutputStream();
seq.write(DerValue.tag_Sequence, extOut);
DerOutputStream tmp;
if (!isCertReq) { // certificate
tmp = new DerOutputStream();
tmp.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)3),
seq);
} else
tmp = seq; // pkcs#10 certificateRequest
out.write(tmp.toByteArray());
}
/**
* Set the attribute value.
* @param name the extension name used in the cache.
* @param obj the object to set.
* @exception IOException if the object could not be cached.
*/
public void set(String name, Object obj) throws IOException {
if (obj instanceof Extension) {
map.put(name, (Extension)obj);
} else {
throw new IOException("Unknown extension type.");
}
}
/**
* Get the attribute value.
* @param name the extension name used in the lookup.
* @exception IOException if named extension is not found.
*/
public Object get(String name) throws IOException {
Object obj = map.get(name);
if (obj == null) {
throw new IOException("No extension found with name " + name);
}
return (obj);
}
/**
* Delete the attribute value.
* @param name the extension name used in the lookup.
* @exception IOException if named extension is not found.
*/
public void delete(String name) throws IOException {
Object obj = map.get(name);
if (obj == null) {
throw new IOException("No extension found with name " + name);
}
map.remove(name);
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration<Extension> getElements() {
return map.elements();
}
/**
* Return a collection view of the extensions.
* @return a collection view of the extensions in this Certificate.
*/
public Collection<Extension> getAllExtensions() {
return map.values();
}
public Map<String,Extension> getUnparseableExtensions() {
if (unparseableExtensions == null) {
return Collections.emptyMap();
} else {
return unparseableExtensions;
}
}
/**
* Return the name of this attribute.
*/
public String getName() {
return NAME;
}
/**
* Return true if a critical extension is found that is
* not supported, otherwise return false.
*/
public boolean hasUnsupportedCriticalExtension() {
return unsupportedCritExt;
}
/**
* Compares this CertificateExtensions for equality with the specified
* object. If the <code>other</code> object is an
* <code>instanceof</code> <code>CertificateExtensions</code>, then
* all the entries are compared with the entries from this.
*
* @param other the object to test for equality with this
* CertificateExtensions.
* @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 CertificateExtensions))
return false;
Collection<Extension> otherC =
((CertificateExtensions)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 this.getUnparseableExtensions().equals(
((CertificateExtensions)other).getUnparseableExtensions());
}
/**
* Returns a hashcode value for this CertificateExtensions.
*
* @return the hashcode value.
*/
public int hashCode() {
return map.hashCode() + getUnparseableExtensions().hashCode();
}
/**
* Returns a string representation of this <tt>CertificateExtensions</tt>
* object in the form of a set of entries, enclosed in braces and separated
* by the ASCII characters "<tt>, </tt>" (comma and space).
* <p>Overrides to <tt>toString</tt> method of <tt>Object</tt>.
*
* @return a string representation of this CertificateExtensions.
*/
public String toString() {
return map.toString();
}
}
class UnparseableExtension extends Extension {
private String name;
private Throwable why;
public UnparseableExtension(Extension ext, Throwable why) {
super(ext);
name = "";
try {
Class extClass = OIDMap.getClass(ext.getExtensionId());
if (extClass != null) {
Field field = extClass.getDeclaredField("NAME");
name = (String)(field.get(null)) + " ";
}
} catch (Exception e) {
// If we cannot find the name, just ignore it
}
this.why = why;
}
@Override public String toString() {
return super.toString() +
"Unparseable " + name + "extension due to\n" + why + "\n\n" +
new sun.misc.HexDumpEncoder().encodeBuffer(getExtensionValue());
}
}