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/*
* Copyright (c) 2003, 2011, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.x509;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Enumeration;
import sun.security.util.DerValue;
import sun.security.util.DerOutputStream;
/**
* Represents the CRL Certificate Issuer Extension (OID = 2.5.29.29).
* <p>
* The CRL certificate issuer extension identifies the certificate issuer
* associated with an entry in an indirect CRL, i.e. a CRL that has the
* indirectCRL indicator set in its issuing distribution point extension. If
* this extension is not present on the first entry in an indirect CRL, the
* certificate issuer defaults to the CRL issuer. On subsequent entries
* in an indirect CRL, if this extension is not present, the certificate
* issuer for the entry is the same as that for the preceding entry.
* <p>
* If used by conforming CRL issuers, this extension is always
* critical. If an implementation ignored this extension it could not
* correctly attribute CRL entries to certificates. PKIX (RFC 3280)
* RECOMMENDS that implementations recognize this extension.
* <p>
* The ASN.1 definition for this is:
* <pre>
* id-ce-certificateIssuer OBJECT IDENTIFIER ::= { id-ce 29 }
*
* certificateIssuer ::= GeneralNames
* </pre>
*
* @author Anne Anderson
* @author Sean Mullan
* @since 1.5
* @see Extension
* @see CertAttrSet
*/
public class CertificateIssuerExtension extends Extension
implements CertAttrSet<String> {
/**
* Attribute names.
*/
public static final String NAME = "CertificateIssuer";
public static final String ISSUER = "issuer";
private GeneralNames names;
/**
* Encode this extension
*/
private void encodeThis() throws IOException {
if (names == null || names.isEmpty()) {
this.extensionValue = null;
return;
}
DerOutputStream os = new DerOutputStream();
names.encode(os);
this.extensionValue = os.toByteArray();
}
/**
* Create a CertificateIssuerExtension containing the specified issuer name.
* Criticality is automatically set to true.
*
* @param issuer the certificate issuer
* @throws IOException on error
*/
public CertificateIssuerExtension(GeneralNames issuer) throws IOException {
this.extensionId = PKIXExtensions.CertificateIssuer_Id;
this.critical = true;
this.names = issuer;
encodeThis();
}
/**
* Create a CertificateIssuerExtension from the specified DER encoded
* value of the same.
*
* @param critical true if the extension is to be treated as critical.
* @param value an array of DER encoded bytes of the actual value
* @throws ClassCastException if value is not an array of bytes
* @throws IOException on error
*/
public CertificateIssuerExtension(Boolean critical, Object value)
throws IOException {
this.extensionId = PKIXExtensions.CertificateIssuer_Id;
this.critical = critical.booleanValue();
this.extensionValue = (byte[]) value;
DerValue val = new DerValue(this.extensionValue);
this.names = new GeneralNames(val);
}
/**
* Set the attribute value.
*
* @throws IOException on error
*/
public void set(String name, Object obj) throws IOException {
if (name.equalsIgnoreCase(ISSUER)) {
if (!(obj instanceof GeneralNames)) {
throw new IOException("Attribute value must be of type " +
"GeneralNames");
}
this.names = (GeneralNames)obj;
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateIssuer");
}
encodeThis();
}
/**
* Gets the attribute value.
*
* @throws IOException on error
*/
public GeneralNames get(String name) throws IOException {
if (name.equalsIgnoreCase(ISSUER)) {
return names;
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateIssuer");
}
}
/**
* Deletes the attribute value.
*
* @throws IOException on error
*/
public void delete(String name) throws IOException {
if (name.equalsIgnoreCase(ISSUER)) {
names = null;
} else {
throw new IOException("Attribute name not recognized by " +
"CertAttrSet:CertificateIssuer");
}
encodeThis();
}
/**
* Returns a printable representation of the certificate issuer.
*/
public String toString() {
return super.toString() + "Certificate Issuer [\n" +
String.valueOf(names) + "]\n";
}
/**
* Write the extension to the OutputStream.
*
* @param out the OutputStream to write the extension to
* @exception IOException on encoding errors
*/
public void encode(OutputStream out) throws IOException {
DerOutputStream tmp = new DerOutputStream();
if (extensionValue == null) {
extensionId = PKIXExtensions.CertificateIssuer_Id;
critical = true;
encodeThis();
}
super.encode(tmp);
out.write(tmp.toByteArray());
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration<String> getElements() {
AttributeNameEnumeration elements = new AttributeNameEnumeration();
elements.addElement(ISSUER);
return elements.elements();
}
/**
* Return the name of this attribute.
*/
public String getName() {
return NAME;
}
}
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