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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.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 Extensions attribute for the Certificate.
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @version 1.11
* @see CertAttrSet
*/
public class Extensions extends Vector<Extension>
implements CertAttrSet {
/**
*
*/
private static final long serialVersionUID = 4597917347772057433L;
/**
* 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 Hashtable<String, Extension> map;
// Parse the encoded extension
public void parseExtension(Extension ext) throws IOException {
try {
@SuppressWarnings("unchecked")
Class<CertAttrSet> extClass = (Class<CertAttrSet>) 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<CertAttrSet> 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 certExt = cons.newInstance(passed);
map.put(certExt.getName(), (Extension) certExt);
addElement((Extension) certExt);
} catch (NoSuchMethodException nosuch) {
throw new IOException(nosuch.toString());
} catch (InvocationTargetException invk) {
throw new IOException(invk.getTargetException().toString());
} catch (Exception e) {
throw new IOException(e.toString());
}
}
/**
* Default constructor for the certificate attribute.
*/
public Extensions() {
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 IOException on decoding errors.
*/
public Extensions(DerInputStream in)
throws IOException {
map = new Hashtable<String, Extension>();
DerValue[] exts = in.getSequence(5);
for (int i = 0; i < exts.length; i++) {
Extension ext = new Extension(exts[i]);
parseExtension(ext);
}
}
/**
* Decode the extensions from the InputStream.
*
* @param in the InputStream to unmarshal the contents from.
* @exception IOException on decoding or validity errors.
*/
public void decode(InputStream in) throws IOException {
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);
}
}
/**
* Encode the extensions in DER form to the stream.
*
* @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 {
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 CertificateException("Invalid extension object");
}
DerOutputStream seq = new DerOutputStream();
seq.write(DerValue.tag_Sequence, extOut);
out.write(seq.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 {
map.put(name, (Extension) obj);
addElement((Extension) obj);
}
/**
* 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);
removeElement(obj);
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration<String> getAttributeNames() {
return map.keys();
}
/**
* Return the name of this attribute.
*/
public String getName() {
return (NAME);
}
}
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