313 lines
11 KiB
Java
313 lines
11 KiB
Java
/*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.x509;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.security.cert.CertificateException;
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import java.security.cert.CertificateParsingException;
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import java.security.cert.CertificateExpiredException;
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import java.security.cert.CertificateNotYetValidException;
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import java.util.Date;
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import java.util.Enumeration;
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import java.util.Objects;
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import sun.security.util.*;
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/**
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* This class defines the Private Key Usage Extension.
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*
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* <p>The Private Key Usage Period extension allows the certificate issuer
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* to specify a different validity period for the private key than the
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* certificate. This extension is intended for use with digital
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* signature keys. This extension consists of two optional components
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* notBefore and notAfter. The private key associated with the
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* certificate should not be used to sign objects before or after the
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* times specified by the two components, respectively.
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*
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* <pre>
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* PrivateKeyUsagePeriod ::= SEQUENCE {
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* notBefore [0] GeneralizedTime OPTIONAL,
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* notAfter [1] GeneralizedTime OPTIONAL }
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* </pre>
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*
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* @author Amit Kapoor
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* @author Hemma Prafullchandra
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* @see Extension
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* @see CertAttrSet
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*/
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public class PrivateKeyUsageExtension extends Extension
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implements CertAttrSet<String> {
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/**
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* Identifier for this attribute, to be used with the
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* get, set, delete methods of Certificate, x509 type.
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*/
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public static final String IDENT = "x509.info.extensions.PrivateKeyUsage";
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/**
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* Sub attributes name for this CertAttrSet.
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*/
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public static final String NAME = "PrivateKeyUsage";
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public static final String NOT_BEFORE = "not_before";
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public static final String NOT_AFTER = "not_after";
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// Private data members
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private static final byte TAG_BEFORE = 0;
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private static final byte TAG_AFTER = 1;
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private Date notBefore = null;
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private Date notAfter = null;
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// Encode this extension value.
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private void encodeThis() throws IOException {
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if (notBefore == null && notAfter == null) {
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this.extensionValue = null;
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return;
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}
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DerOutputStream seq = new DerOutputStream();
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DerOutputStream tagged = new DerOutputStream();
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if (notBefore != null) {
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DerOutputStream tmp = new DerOutputStream();
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tmp.putGeneralizedTime(notBefore);
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tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT,
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false, TAG_BEFORE), tmp);
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}
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if (notAfter != null) {
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DerOutputStream tmp = new DerOutputStream();
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tmp.putGeneralizedTime(notAfter);
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tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT,
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false, TAG_AFTER), tmp);
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}
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seq.write(DerValue.tag_Sequence, tagged);
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this.extensionValue = seq.toByteArray();
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}
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/**
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* The default constructor for PrivateKeyUsageExtension.
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*
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* @param notBefore the date/time before which the private key
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* should not be used.
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* @param notAfter the date/time after which the private key
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* should not be used.
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*/
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public PrivateKeyUsageExtension(Date notBefore, Date notAfter)
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throws IOException {
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this.notBefore = notBefore;
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this.notAfter = notAfter;
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this.extensionId = PKIXExtensions.PrivateKeyUsage_Id;
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this.critical = false;
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encodeThis();
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}
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/**
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* Create the extension from the passed DER encoded value.
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*
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* @param critical true if the extension is to be treated as critical.
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* @param value an array of DER encoded bytes of the actual value.
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* @exception ClassCastException if value is not an array of bytes
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* @exception CertificateException on certificate parsing errors.
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* @exception IOException on error.
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*/
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public PrivateKeyUsageExtension(Boolean critical, Object value)
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throws CertificateException, IOException {
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this.extensionId = PKIXExtensions.PrivateKeyUsage_Id;
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this.critical = critical.booleanValue();
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this.extensionValue = (byte[]) value;
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DerInputStream str = new DerInputStream(this.extensionValue);
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DerValue[] seq = str.getSequence(2);
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// NB. this is always encoded with the IMPLICIT tag
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// The checks only make sense if we assume implicit tagging,
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// with explicit tagging the form is always constructed.
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for (int i = 0; i < seq.length; i++) {
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DerValue opt = seq[i];
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if (opt.isContextSpecific(TAG_BEFORE) &&
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!opt.isConstructed()) {
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if (notBefore != null) {
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throw new CertificateParsingException(
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"Duplicate notBefore in PrivateKeyUsage.");
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}
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opt.resetTag(DerValue.tag_GeneralizedTime);
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str = new DerInputStream(opt.toByteArray());
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notBefore = str.getGeneralizedTime();
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} else if (opt.isContextSpecific(TAG_AFTER) &&
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!opt.isConstructed()) {
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if (notAfter != null) {
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throw new CertificateParsingException(
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"Duplicate notAfter in PrivateKeyUsage.");
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}
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opt.resetTag(DerValue.tag_GeneralizedTime);
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str = new DerInputStream(opt.toByteArray());
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notAfter = str.getGeneralizedTime();
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} else
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throw new IOException("Invalid encoding of " +
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"PrivateKeyUsageExtension");
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}
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}
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/**
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* Return the printable string.
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*/
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public String toString() {
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return(super.toString() +
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"PrivateKeyUsage: [\n" +
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((notBefore == null) ? "" : "From: " + notBefore.toString() + ", ")
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+ ((notAfter == null) ? "" : "To: " + notAfter.toString())
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+ "]\n");
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}
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/**
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* Verify that that the current time is within the validity period.
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*
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* @exception CertificateExpiredException if the certificate has expired.
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* @exception CertificateNotYetValidException if the certificate is not
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* yet valid.
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*/
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public void valid()
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throws CertificateNotYetValidException, CertificateExpiredException {
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Date now = new Date();
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valid(now);
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}
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/**
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* Verify that that the passed time is within the validity period.
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*
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* @exception CertificateExpiredException if the certificate has expired
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* with respect to the <code>Date</code> supplied.
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* @exception CertificateNotYetValidException if the certificate is not
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* yet valid with respect to the <code>Date</code> supplied.
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*
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*/
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public void valid(Date now)
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throws CertificateNotYetValidException, CertificateExpiredException {
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Objects.requireNonNull(now);
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/*
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* we use the internal Dates rather than the passed in Date
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* because someone could override the Date methods after()
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* and before() to do something entirely different.
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*/
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if (notBefore != null && notBefore.after(now)) {
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throw new CertificateNotYetValidException("NotBefore: " +
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notBefore.toString());
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}
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if (notAfter != null && notAfter.before(now)) {
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throw new CertificateExpiredException("NotAfter: " +
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notAfter.toString());
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}
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}
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/**
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* Write the extension to the OutputStream.
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*
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* @param out the OutputStream to write the extension to.
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* @exception IOException on encoding errors.
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*/
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public void encode(OutputStream out) throws IOException {
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DerOutputStream tmp = new DerOutputStream();
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if (extensionValue == null) {
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extensionId = PKIXExtensions.PrivateKeyUsage_Id;
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critical = false;
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encodeThis();
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}
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super.encode(tmp);
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out.write(tmp.toByteArray());
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}
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/**
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* Set the attribute value.
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* @exception CertificateException on attribute handling errors.
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*/
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public void set(String name, Object obj)
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throws CertificateException, IOException {
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if (!(obj instanceof Date)) {
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throw new CertificateException("Attribute must be of type Date.");
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}
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if (name.equalsIgnoreCase(NOT_BEFORE)) {
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notBefore = (Date)obj;
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} else if (name.equalsIgnoreCase(NOT_AFTER)) {
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notAfter = (Date)obj;
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} else {
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throw new CertificateException("Attribute name not recognized by"
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+ " CertAttrSet:PrivateKeyUsage.");
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}
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encodeThis();
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}
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/**
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* Get the attribute value.
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* @exception CertificateException on attribute handling errors.
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*/
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public Date get(String name) throws CertificateException {
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if (name.equalsIgnoreCase(NOT_BEFORE)) {
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return (new Date(notBefore.getTime()));
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} else if (name.equalsIgnoreCase(NOT_AFTER)) {
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return (new Date(notAfter.getTime()));
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} else {
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throw new CertificateException("Attribute name not recognized by"
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+ " CertAttrSet:PrivateKeyUsage.");
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}
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}
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/**
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* Delete the attribute value.
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* @exception CertificateException on attribute handling errors.
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*/
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public void delete(String name) throws CertificateException, IOException {
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if (name.equalsIgnoreCase(NOT_BEFORE)) {
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notBefore = null;
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} else if (name.equalsIgnoreCase(NOT_AFTER)) {
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notAfter = null;
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} else {
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throw new CertificateException("Attribute name not recognized by"
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+ " CertAttrSet:PrivateKeyUsage.");
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}
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encodeThis();
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}
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/**
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* Return an enumeration of names of attributes existing within this
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* attribute.
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*/
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public Enumeration<String> getElements() {
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AttributeNameEnumeration elements = new AttributeNameEnumeration();
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elements.addElement(NOT_BEFORE);
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elements.addElement(NOT_AFTER);
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return(elements.elements());
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}
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/**
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* Return the name of this attribute.
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*/
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public String getName() {
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return(NAME);
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}
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}
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