/*
* @(#)CertificateAlgorithmId.java 1.19 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package sun.security.x509;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import sun.security.util.*;
/**
* This class defines the AlgorithmId for the Certificate.
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @version 1.12
*/
public class CertificateAlgorithmId implements CertAttrSet {
private AlgorithmId algId;
/**
* Identifier for this attribute, to be used with the
* get, set, delete methods of Certificate, x509 type.
*/
public static final String IDENT = "x509.info.algorithmID";
/**
* Sub attributes name for this CertAttrSet.
*/
public static final String NAME = "algorithmID";
/**
* Identifier to be used with get, set, and delete methods. When
* using this identifier the associated object being passed in or
* returned is an instance of AlgorithmId.
* @see sun.security.x509.AlgorithmId
*/
public static final String ALGORITHM = "algorithm";
/**
* Default constructor for the certificate attribute.
*
* @param algId the Algorithm identifier
*/
public CertificateAlgorithmId(AlgorithmId algId) {
this.algId = algId;
}
/**
* Create the object, decoding the values from the passed DER stream.
*
* @param in the DerInputStream to read the serial number from.
* @exception IOException on decoding errors.
*/
public CertificateAlgorithmId(DerInputStream in) throws IOException {
DerValue val = in.getDerValue();
algId = AlgorithmId.parse(val);
}
/**
* Create the object, decoding the values from the passed stream.
*
* @param in the InputStream to read the serial number from.
* @exception IOException on decoding errors.
*/
public CertificateAlgorithmId(InputStream in) throws IOException {
DerValue val = new DerValue(in);
algId = AlgorithmId.parse(val);
}
/**
* Return the algorithm identifier as user readable string.
*/
public String toString() {
if (algId == null) return "";
return (algId.toString() +
", OID = " + (algId.getOID()).toString() + "\n");
}
/**
* Encode the algorithm identifier in DER form to the stream.
*
* @param out the DerOutputStream to marshal the contents to.
* @exception IOException on errors.
*/
public void encode(OutputStream out) throws IOException {
DerOutputStream tmp = new DerOutputStream();
algId.encode(tmp);
out.write(tmp.toByteArray());
}
/**
* Decode the algorithm identifier from the passed stream.
*
* @param in the InputStream to unmarshal the contents from.
* @exception IOException on errors.
*/
public void decode(InputStream in) throws IOException {
DerValue derVal = new DerValue(in);
algId = AlgorithmId.parse(derVal);
}
/**
* Set the attribute value.
*/
public void set(String name, Object obj) throws IOException {
if (!(obj instanceof AlgorithmId)) {
throw new IOException("Attribute must be of type AlgorithmId.");
}
if (name.equalsIgnoreCase(ALGORITHM)) {
algId = (AlgorithmId)obj;
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateAlgorithmId.");
}
}
/**
* Get the attribute value.
*/
public Object get(String name) throws IOException {
if (name.equalsIgnoreCase(ALGORITHM)) {
return (algId);
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateAlgorithmId.");
}
}
/**
* Delete the attribute value.
*/
public void delete(String name) throws IOException {
if (name.equalsIgnoreCase(ALGORITHM)) {
algId = null;
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateAlgorithmId.");
}
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration getElements() {
AttributeNameEnumeration elements = new AttributeNameEnumeration();
elements.addElement(ALGORITHM);
return (elements.elements());
}
/**
* Return the name of this attribute.
*/
public String getName() {
return (NAME);
}
}