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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.pkcs;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Serializable;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.security.cert.CertificateException;
import netscape.security.util.DerEncoder;
import netscape.security.util.DerInputStream;
import netscape.security.util.DerOutputStream;
import netscape.security.util.DerValue;
import netscape.security.util.ObjectIdentifier;
import netscape.security.x509.ACertAttrSet;
import netscape.security.x509.CertAttrSet;
import netscape.security.x509.Extensions;
import netscape.security.x509.OIDMap;
/**
* Represent a PKCS Attribute.
*
* <p>
* Attributes are addiitonal attributes which can be inserted in a PKCS certificate request. For example a
* "Driving License Certificate" could have the driving license number as a attribute.
*
* <p>
* Attributes are represented as a sequence of the attribute identifier (Object Identifier) and a set of DER encoded
* attribute values. The current implementation only supports one value per attribute.
*
* ASN.1 definition of Attribute:
*
* <pre>
* Attribute :: SEQUENCE {
* type AttributeValue,
* values SET OF AttributeValue
* }
* AttributeValue ::= ANY
* </pre>
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @version 1.13
*/
public class PKCS10Attribute implements DerEncoder, Serializable {
/**
*
*/
private static final long serialVersionUID = 2002480042340316170L;
protected ObjectIdentifier attributeId = null;
protected CertAttrSet attributeValue = null;
/**
* Default constructor. Used only by sub-classes.
*/
public PKCS10Attribute() {
}
/**
* Constructs an attribute from a DER encoded array of bytes.
*/
public PKCS10Attribute(DerValue derVal) throws IOException {
if (derVal.tag != DerValue.tag_Sequence) {
throw new IOException("Sequence tag missing for PKCS10Attribute.");
}
DerInputStream in = derVal.toDerInputStream();
// Object identifier
attributeId = in.getOID();
// System.out.println("attribute ID in pkcs10 "+attributeId.toString());
// Rest of the stuff is attribute value(s), wrapped in a SET.
// For now, assume there is only one attribute value present.
DerValue[] inAttrValues = in.getSet(1);
int attrValueNum = inAttrValues.length;
if (attrValueNum > 1) {
throw new IOException("More than one value per attribute not supported");
}
// Read the first attribute value
DerValue inAttrValue = inAttrValues[0];
if (attributeId.equals(PKCS9Attribute.EXTENSION_REQUEST_OID)) {
//pkcs9 extensionAttr
try {
// remove the tag
//DerValue dv = inAttrValue.data.getDerValue();
// hack. toDerInputStream only gives one extension.
DerInputStream fi = new DerInputStream(inAttrValue.toByteArray());
attributeValue = (CertAttrSet) new
Extensions(fi);
//CertificateExtensions(fi);
return;
} catch (Exception e) {
throw new IOException(e.toString());
}
}
byte[] val = inAttrValue.toByteArray();
Class<?>[] params = { Object.class };
try {
@SuppressWarnings("unchecked")
Class<CertAttrSet> extClass = (Class<CertAttrSet>) OIDMap.getClass(attributeId);
if (extClass != null) {
Constructor<CertAttrSet> cons = (Constructor<CertAttrSet>) extClass.getConstructor(params);
Object value = Array.newInstance(byte.class, val.length);
for (int i = 0; i < val.length; i++) {
Array.setByte(value, i, val[i]);
}
Object[] passed = new Object[] { value };
attributeValue = cons.newInstance(passed);
} else {
// attribute classes are usable for PKCS10 attributes.
// this is used where the attributes are not actual
// implemented extensions.
attributeValue = new ACertAttrSet(inAttrValue);
}
} catch (InvocationTargetException invk) {
throw new IOException(invk.getTargetException().getMessage());
} catch (Exception e) {
throw new IOException(e.toString());
}
}
/**
* Constructs an attribute from individual components of ObjectIdentifier
* and the DER encoded value.
*
* @param attributeId the ObjectIdentifier of the attribute.
* @param attributeValue the CertAttrSet.
*/
public PKCS10Attribute(ObjectIdentifier attributeId,
CertAttrSet attributeValue) {
this.attributeId = attributeId;
this.attributeValue = attributeValue;
}
/**
* Constructs an attribute from another attribute. To be used for
* creating decoded subclasses.
*
* @param attr the attribute to create from.
*/
public PKCS10Attribute(PKCS10Attribute attr) {
this.attributeId = attr.attributeId;
this.attributeValue = attr.attributeValue;
}
/**
* Write the output to the DerOutputStream.
*
* @param out the OutputStream to write the attribute to.
* @exception CertificateException on certificate encoding errors.
* @exception IOException on encoding errors.
*/
public void encode(OutputStream out)
throws CertificateException, IOException {
// Encode the attribute value
DerOutputStream outAttrValue = new DerOutputStream();
attributeValue.encode(outAttrValue);
// Wrap the encoded attribute value into a SET
DerValue outAttrValueSet = new DerValue(DerValue.tag_Set,
outAttrValue.toByteArray());
// Create the attribute
DerOutputStream outAttr = new DerOutputStream();
outAttr.putOID(attributeId);
outAttr.putDerValue(outAttrValueSet);
// Wrap the OID and the set of attribute values into a SEQUENCE
DerOutputStream tmp = new DerOutputStream();
tmp.write(DerValue.tag_Sequence, outAttr);
// write the results to out
out.write(tmp.toByteArray());
}
/**
* DER encode this object onto an output stream.
* Implements the <code>DerEncoder</code> interface.
*
* @param out
* the OutputStream on which to write the DER encoding.
*
* @exception IOException on encoding errors.
*/
public void derEncode(OutputStream out) throws IOException {
try {
encode(out);
} catch (CertificateException ce) {
IOException ioe = new IOException(ce.toString());
ioe.fillInStackTrace();
throw ioe;
}
}
/**
* Returns the ObjectIdentifier of the attribute.
*/
public ObjectIdentifier getAttributeId() {
return (attributeId);
}
/**
* Returns the attribute value as an byte array for further processing.
*/
public CertAttrSet getAttributeValue() {
return (attributeValue);
}
/**
* Returns the attribute in user readable form.
*/
public String toString() {
String s = "AttributeId: " + attributeId.toString() + "\n";
s += "AttributeValue: " + attributeValue.toString();
return (s);
}
}
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