/*
* Copyright 2004-2006 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA 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.OutputStream;
import java.util.*;
import sun.security.util.DerOutputStream;
import sun.security.util.DerValue;
/**
* The Authority Information Access Extension (OID = 1.3.6.1.5.5.7.1.1).
* <p>
* The AIA extension identifies how to access CA information and services
* for the certificate in which it appears. It enables CAs to issue their
* certificates pre-configured with the URLs appropriate for contacting
* services relevant to those certificates. For example, a CA may issue a
* certificate that identifies the specific OCSP Responder to use when
* performing on-line validation of that certificate.
* <p>
* This extension is defined in
* <a href="http://www.ietf.org/rfc/rfc3280.txt">Internet X.509 PKI Certificate and Certificate Revocation List (CRL) Profile</a>. The profile permits
* the extension to be included in end-entity or CA certificates,
* and it must be marked as non-critical. Its ASN.1 definition is as follows:
* <pre>
* id-pe-authorityInfoAccess OBJECT IDENTIFIER ::= { id-pe 1 }
*
* AuthorityInfoAccessSyntax ::=
* SEQUENCE SIZE (1..MAX) OF AccessDescription
*
* AccessDescription ::= SEQUENCE {
* accessMethod OBJECT IDENTIFIER,
* accessLocation GeneralName }
* </pre>
* <p>
* @see Extension
* @see CertAttrSet
*/
public class AuthorityInfoAccessExtension extends Extension
implements CertAttrSet<String> {
/**
* 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.AuthorityInfoAccess";
/**
* Attribute name.
*/
public static final String NAME = "AuthorityInfoAccess";
public static final String DESCRIPTIONS = "descriptions";
/**
* The List of AccessDescription objects.
*/
private List<AccessDescription> accessDescriptions;
/**
* Create an AuthorityInfoAccessExtension from a List of
* AccessDescription; the criticality is set to false.
*
* @param accessDescriptions the List of AccessDescription
* @throws IOException on error
*/
public AuthorityInfoAccessExtension(
List<AccessDescription> accessDescriptions) throws IOException {
this.extensionId = PKIXExtensions.AuthInfoAccess_Id;
this.critical = false;
this.accessDescriptions = accessDescriptions;
encodeThis();
}
/**
* Create the extension from the passed DER encoded value of the same.
*
* @param critical true if the extension is to be treated as critical.
* @param value Array of DER encoded bytes of the actual value.
* @exception IOException on error.
*/
public AuthorityInfoAccessExtension(Boolean critical, Object value)
throws IOException {
this.extensionId = PKIXExtensions.AuthInfoAccess_Id;
this.critical = critical.booleanValue();
if (!(value instanceof byte[])) {
throw new IOException("Illegal argument type");
}
extensionValue = (byte[])value;
DerValue val = new DerValue(extensionValue);
if (val.tag != DerValue.tag_Sequence) {
throw new IOException("Invalid encoding for " +
"AuthorityInfoAccessExtension.");
}
accessDescriptions = new ArrayList<AccessDescription>();
while (val.data.available() != 0) {
DerValue seq = val.data.getDerValue();
AccessDescription accessDescription = new AccessDescription(seq);
accessDescriptions.add(accessDescription);
}
}
/**
* Return the list of AccessDescription objects.
*/
public List<AccessDescription> getAccessDescriptions() {
return accessDescriptions;
}
/**
* Return the name of this attribute.
*/
public String getName() {
return NAME;
}
/**
* Write the extension to the DerOutputStream.
*
* @param out the DerOutputStream to write the extension to.
* @exception IOException on encoding errors.
*/
public void encode(OutputStream out) throws IOException {
DerOutputStream tmp = new DerOutputStream();
if (this.extensionValue == null) {
this.extensionId = PKIXExtensions.AuthInfoAccess_Id;
this.critical = false;
encodeThis();
}
super.encode(tmp);
out.write(tmp.toByteArray());
}
/**
* Set the attribute value.
*/
public void set(String name, Object obj) throws IOException {
if (name.equalsIgnoreCase(DESCRIPTIONS)) {
if (!(obj instanceof List)) {
throw new IOException("Attribute value should be of type List.");
}
accessDescriptions = (List<AccessDescription>)obj;
} else {
throw new IOException("Attribute name [" + name +
"] not recognized by " +
"CertAttrSet:AuthorityInfoAccessExtension.");
}
encodeThis();
}
/**
* Get the attribute value.
*/
public Object get(String name) throws IOException {
if (name.equalsIgnoreCase(DESCRIPTIONS)) {
return accessDescriptions;
} else {
throw new IOException("Attribute name [" + name +
"] not recognized by " +
"CertAttrSet:AuthorityInfoAccessExtension.");
}
}
/**
* Delete the attribute value.
*/
public void delete(String name) throws IOException {
if (name.equalsIgnoreCase(DESCRIPTIONS)) {
accessDescriptions = new ArrayList<AccessDescription>();
} else {
throw new IOException("Attribute name [" + name +
"] not recognized by " +
"CertAttrSet:AuthorityInfoAccessExtension.");
}
encodeThis();
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration<String> getElements() {
AttributeNameEnumeration elements = new AttributeNameEnumeration();
elements.addElement(DESCRIPTIONS);
return elements.elements();
}
// Encode this extension value
private void encodeThis() throws IOException {
if (accessDescriptions.isEmpty()) {
this.extensionValue = null;
} else {
DerOutputStream ads = new DerOutputStream();
for (AccessDescription accessDescription : accessDescriptions) {
accessDescription.encode(ads);
}
DerOutputStream seq = new DerOutputStream();
seq.write(DerValue.tag_Sequence, ads);
this.extensionValue = seq.toByteArray();
}
}
/**
* Return the extension as user readable string.
*/
public String toString() {
return super.toString() + "AuthorityInfoAccess [\n "
+ accessDescriptions + "\n]\n";
}
}