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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.x509;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.security.cert.CRLException;
import java.security.cert.CertificateException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import netscape.security.util.DerInputStream;
import netscape.security.util.DerOutputStream;
import netscape.security.util.DerValue;
/**
* This class defines the CRL Extensions.
*
* @author Hemma Prafullchandra
* @version 1.4
*/
public class CRLExtensions extends Vector<Extension> {
/**
*
*/
private static final long serialVersionUID = 365767738692986418L;
private Hashtable<String, Extension> map;
// Parse the encoded extension
private void parseExtension(Extension ext) throws X509ExtensionException {
try {
Class<?> extClass = OIDMap.getClass(ext.getExtensionId());
if (extClass == null) { // Unsupported extension
if (ext.isCritical()) {
throw new IOException("Unsupported CRITICAL extension: "
+ ext.getExtensionId());
} else {
map.put(ext.getExtensionId().toString(), ext);
addElement(ext);
return;
}
}
Class<?>[] params = { Boolean.class, Object.class };
Constructor<?> cons = extClass.getConstructor(params);
byte[] extData = ext.getExtensionValue();
int extLen = extData.length;
Object value = Array.newInstance(byte.class, extLen);
for (int i = 0; i < extLen; i++) {
Array.setByte(value, i, extData[i]);
}
Object[] passed = new Object[] { new Boolean(ext.isCritical()),
value };
CertAttrSet crlExt = (CertAttrSet) cons.newInstance(passed);
map.put(crlExt.getName(), (Extension) crlExt);
addElement((Extension) crlExt);
} catch (InvocationTargetException invk) {
throw new X509ExtensionException(
invk.getTargetException().getMessage());
} catch (Exception e) {
throw new X509ExtensionException(e.toString());
}
}
/**
* Default constructor.
*/
public CRLExtensions() {
map = new Hashtable<String, Extension>();
}
/**
* Create the object, decoding the values from the passed DER stream.
*
* @param in the DerInputStream to read the Extension from.
* @exception CRLException on decoding errors.
* @exception X509ExtensionException on extension handling errors.
*/
public CRLExtensions(DerInputStream in)
throws CRLException, X509ExtensionException {
map = new Hashtable<String, Extension>();
try {
DerValue[] exts = in.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());
}
}
/**
* Decode the extensions from the InputStream.
*
* @param in the InputStream to unmarshal the contents from.
* @exception CRLException on decoding or validity errors.
* @exception X509ExtensionException on extension handling errors.
*/
public void decode(InputStream in)
throws CRLException, X509ExtensionException {
try {
DerValue val = new DerValue(in);
DerInputStream str = val.toDerInputStream();
map = new Hashtable<String, Extension>();
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());
}
}
/**
* 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 or a CRL extension.
* @exception CRLException on encoding errors.
*/
public void encode(OutputStream out, boolean isExplicit)
throws CRLException {
try {
// #381559
if (size() == 0)
return;
DerOutputStream extOut = new DerOutputStream();
for (int i = 0; i < size(); i++) {
Object thisOne = elementAt(i);
if (thisOne instanceof CertAttrSet)
((CertAttrSet) thisOne).encode(extOut);
else if (thisOne instanceof Extension)
((Extension) thisOne).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.
* @exception X509ExtensionException on extension handling errors.
*/
public Extension get(String alias) throws X509ExtensionException {
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;
Extension ext = (Extension) map.get(name);
if (ext == null)
throw new X509ExtensionException("No extension found with name: "
+ alias);
return ext;
}
/**
* 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.
* @exception IOException on errors.
*/
public void set(String alias, Extension obj) throws IOException {
map.put(alias, obj);
addElement(obj);
}
/**
* Return an enumeration of names of the extensions.
*
* @return an enumeration of the names of the extensions in this CRL.
*/
public Enumeration<Extension> getElements() {
return (map.elements());
}
}
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