253 lines
8.7 KiB
Java
253 lines
8.7 KiB
Java
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/*
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* Copyright (c) 2000, 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.util.*;
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import sun.security.util.DerValue;
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import sun.security.util.DerOutputStream;
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/**
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* This class defines the certificate policies extension which specifies the
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* policies under which the certificate has been issued
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* and the purposes for which the certificate may be used.
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* <p>
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* Applications with specific policy requirements are expected to have a
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* list of those policies which they will accept and to compare the
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* policy OIDs in the certificate to that list. If this extension is
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* critical, the path validation software MUST be able to interpret this
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* extension (including the optional qualifier), or MUST reject the
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* certificate.
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* <p>
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* Optional qualifiers are not supported in this implementation, as they are
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* not recommended by RFC2459.
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*
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* The ASN.1 syntax for this is (IMPLICIT tagging is defined in the
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* module definition):
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* <pre>
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* id-ce-certificatePolicies OBJECT IDENTIFIER ::= { id-ce 32 }
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*
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* certificatePolicies ::= SEQUENCE SIZE (1..MAX) OF PolicyInformation
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*
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* PolicyInformation ::= SEQUENCE {
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* policyIdentifier CertPolicyId,
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* policyQualifiers SEQUENCE SIZE (1..MAX) OF
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* PolicyQualifierInfo OPTIONAL }
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*
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* CertPolicyId ::= OBJECT IDENTIFIER
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* </pre>
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* @author Anne Anderson
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* @since 1.4
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* @see Extension
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* @see CertAttrSet
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*/
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public class CertificatePoliciesExtension 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.CertificatePolicies";
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/**
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* Attribute names.
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*/
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public static final String NAME = "CertificatePolicies";
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public static final String POLICIES = "policies";
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/**
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* List of PolicyInformation for this object.
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*/
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private List<PolicyInformation> certPolicies;
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// Encode this extension value.
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private void encodeThis() throws IOException {
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if (certPolicies == null || certPolicies.isEmpty()) {
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this.extensionValue = null;
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} else {
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DerOutputStream os = new DerOutputStream();
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DerOutputStream tmp = new DerOutputStream();
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for (PolicyInformation info : certPolicies) {
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info.encode(tmp);
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}
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os.write(DerValue.tag_Sequence, tmp);
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this.extensionValue = os.toByteArray();
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}
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}
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/**
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* Create a CertificatePoliciesExtension object from
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* a List of PolicyInformation; the criticality is set to false.
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*
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* @param certPolicies the List of PolicyInformation.
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*/
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public CertificatePoliciesExtension(List<PolicyInformation> certPolicies)
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throws IOException {
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this(Boolean.FALSE, certPolicies);
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}
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/**
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* Create a CertificatePoliciesExtension object from
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* a List of PolicyInformation with specified criticality.
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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 certPolicies the List of PolicyInformation.
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*/
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public CertificatePoliciesExtension(Boolean critical,
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List<PolicyInformation> certPolicies) throws IOException {
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this.certPolicies = certPolicies;
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this.extensionId = PKIXExtensions.CertificatePolicies_Id;
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this.critical = critical.booleanValue();
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encodeThis();
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}
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/**
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* Create the extension from its DER encoded value and criticality.
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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 IOException on error.
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*/
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public CertificatePoliciesExtension(Boolean critical, Object value)
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throws IOException {
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this.extensionId = PKIXExtensions.CertificatePolicies_Id;
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this.critical = critical.booleanValue();
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this.extensionValue = (byte[]) value;
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DerValue val = new DerValue(this.extensionValue);
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if (val.tag != DerValue.tag_Sequence) {
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throw new IOException("Invalid encoding for " +
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"CertificatePoliciesExtension.");
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}
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certPolicies = new ArrayList<PolicyInformation>();
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while (val.data.available() != 0) {
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DerValue seq = val.data.getDerValue();
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PolicyInformation policy = new PolicyInformation(seq);
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certPolicies.add(policy);
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}
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}
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/**
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* Return the extension as user readable string.
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*/
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public String toString() {
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if (certPolicies == null) {
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return "";
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}
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StringBuilder sb = new StringBuilder(super.toString());
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sb.append("CertificatePolicies [\n");
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for (PolicyInformation info : certPolicies) {
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sb.append(info.toString());
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}
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sb.append("]\n");
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return sb.toString();
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}
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/**
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* Write the extension to the DerOutputStream.
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*
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* @param out the DerOutputStream 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.CertificatePolicies_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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*/
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@SuppressWarnings("unchecked") // Checked with an instanceof check
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public void set(String name, Object obj) throws IOException {
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if (name.equalsIgnoreCase(POLICIES)) {
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if (!(obj instanceof List)) {
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throw new IOException("Attribute value should be of type List.");
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}
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certPolicies = (List<PolicyInformation>)obj;
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} else {
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throw new IOException("Attribute name [" + name +
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"] not recognized by " +
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"CertAttrSet:CertificatePoliciesExtension.");
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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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*/
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public List<PolicyInformation> get(String name) throws IOException {
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if (name.equalsIgnoreCase(POLICIES)) {
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//XXXX May want to consider cloning this
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return certPolicies;
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} else {
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throw new IOException("Attribute name [" + name +
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"] not recognized by " +
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"CertAttrSet:CertificatePoliciesExtension.");
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}
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}
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/**
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* Delete the attribute value.
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*/
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public void delete(String name) throws IOException {
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if (name.equalsIgnoreCase(POLICIES)) {
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certPolicies = null;
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} else {
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throw new IOException("Attribute name [" + name +
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"] not recognized by " +
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"CertAttrSet:CertificatePoliciesExtension.");
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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(POLICIES);
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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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