| /* |
| * Copyright (c) 1997, 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.security.cert.CertificateException; |
| import java.util.Enumeration; |
| import java.util.Vector; |
| |
| import sun.security.util.*; |
| |
| /** |
| * This class defines the certificate extension which specifies the |
| * Policy constraints. |
| * <p> |
| * The policy constraints extension can be used in certificates issued |
| * to CAs. The policy constraints extension constrains path validation |
| * in two ways. It can be used to prohibit policy mapping or require |
| * that each certificate in a path contain an acceptable policy |
| * identifier.<p> |
| * The ASN.1 syntax for this is (IMPLICIT tagging is defined in the |
| * module definition): |
| * <pre> |
| * PolicyConstraints ::= SEQUENCE { |
| * requireExplicitPolicy [0] SkipCerts OPTIONAL, |
| * inhibitPolicyMapping [1] SkipCerts OPTIONAL |
| * } |
| * SkipCerts ::= INTEGER (0..MAX) |
| * </pre> |
| * @author Amit Kapoor |
| * @author Hemma Prafullchandra |
| * @see Extension |
| * @see CertAttrSet |
| */ |
| public class PolicyConstraintsExtension 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.PolicyConstraints"; |
| /** |
| * Attribute names. |
| */ |
| public static final String NAME = "PolicyConstraints"; |
| public static final String REQUIRE = "require"; |
| public static final String INHIBIT = "inhibit"; |
| |
| private static final byte TAG_REQUIRE = 0; |
| private static final byte TAG_INHIBIT = 1; |
| |
| private int require = -1; |
| private int inhibit = -1; |
| |
| // Encode this extension value. |
| private void encodeThis() throws IOException { |
| if (require == -1 && inhibit == -1) { |
| this.extensionValue = null; |
| return; |
| } |
| DerOutputStream tagged = new DerOutputStream(); |
| DerOutputStream seq = new DerOutputStream(); |
| |
| if (require != -1) { |
| DerOutputStream tmp = new DerOutputStream(); |
| tmp.putInteger(require); |
| tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, |
| false, TAG_REQUIRE), tmp); |
| } |
| if (inhibit != -1) { |
| DerOutputStream tmp = new DerOutputStream(); |
| tmp.putInteger(inhibit); |
| tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, |
| false, TAG_INHIBIT), tmp); |
| } |
| seq.write(DerValue.tag_Sequence, tagged); |
| this.extensionValue = seq.toByteArray(); |
| } |
| |
| /** |
| * Create a PolicyConstraintsExtension object with both |
| * require explicit policy and inhibit policy mapping. The |
| * extension is marked non-critical. |
| * |
| * @param require require explicit policy (-1 for optional). |
| * @param inhibit inhibit policy mapping (-1 for optional). |
| */ |
| public PolicyConstraintsExtension(int require, int inhibit) |
| throws IOException { |
| this(Boolean.FALSE, require, inhibit); |
| } |
| |
| /** |
| * Create a PolicyConstraintsExtension object with specified |
| * criticality and both require explicit policy and inhibit |
| * policy mapping. |
| * |
| * @param critical true if the extension is to be treated as critical. |
| * @param require require explicit policy (-1 for optional). |
| * @param inhibit inhibit policy mapping (-1 for optional). |
| */ |
| public PolicyConstraintsExtension(Boolean critical, int require, int inhibit) |
| throws IOException { |
| this.require = require; |
| this.inhibit = inhibit; |
| this.extensionId = PKIXExtensions.PolicyConstraints_Id; |
| this.critical = critical.booleanValue(); |
| encodeThis(); |
| } |
| |
| /** |
| * Create the extension from its DER encoded value and criticality. |
| * |
| * @param critical true if the extension is to be treated as critical. |
| * @param value an array of DER encoded bytes of the actual value. |
| * @exception ClassCastException if value is not an array of bytes |
| * @exception IOException on error. |
| */ |
| public PolicyConstraintsExtension(Boolean critical, Object value) |
| throws IOException { |
| this.extensionId = PKIXExtensions.PolicyConstraints_Id; |
| this.critical = critical.booleanValue(); |
| |
| this.extensionValue = (byte[]) value; |
| DerValue val = new DerValue(this.extensionValue); |
| if (val.tag != DerValue.tag_Sequence) { |
| throw new IOException("Sequence tag missing for PolicyConstraint."); |
| } |
| DerInputStream in = val.data; |
| while (in != null && in.available() != 0) { |
| DerValue next = in.getDerValue(); |
| |
| if (next.isContextSpecific(TAG_REQUIRE) && !next.isConstructed()) { |
| if (this.require != -1) |
| throw new IOException("Duplicate requireExplicitPolicy" + |
| "found in the PolicyConstraintsExtension"); |
| next.resetTag(DerValue.tag_Integer); |
| this.require = next.getInteger(); |
| |
| } else if (next.isContextSpecific(TAG_INHIBIT) && |
| !next.isConstructed()) { |
| if (this.inhibit != -1) |
| throw new IOException("Duplicate inhibitPolicyMapping" + |
| "found in the PolicyConstraintsExtension"); |
| next.resetTag(DerValue.tag_Integer); |
| this.inhibit = next.getInteger(); |
| } else |
| throw new IOException("Invalid encoding of PolicyConstraint"); |
| } |
| } |
| |
| /** |
| * Return the extension as user readable string. |
| */ |
| public String toString() { |
| String s; |
| s = super.toString() + "PolicyConstraints: [" + " Require: "; |
| if (require == -1) |
| s += "unspecified;"; |
| else |
| s += require + ";"; |
| s += "\tInhibit: "; |
| if (inhibit == -1) |
| s += "unspecified"; |
| else |
| s += inhibit; |
| s += " ]\n"; |
| return s; |
| } |
| |
| /** |
| * 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 (extensionValue == null) { |
| extensionId = PKIXExtensions.PolicyConstraints_Id; |
| critical = false; |
| encodeThis(); |
| } |
| super.encode(tmp); |
| out.write(tmp.toByteArray()); |
| } |
| |
| /** |
| * Set the attribute value. |
| */ |
| public void set(String name, Object obj) throws IOException { |
| if (!(obj instanceof Integer)) { |
| throw new IOException("Attribute value should be of type Integer."); |
| } |
| if (name.equalsIgnoreCase(REQUIRE)) { |
| require = ((Integer)obj).intValue(); |
| } else if (name.equalsIgnoreCase(INHIBIT)) { |
| inhibit = ((Integer)obj).intValue(); |
| } else { |
| throw new IOException("Attribute name " + "[" + name + "]" + |
| " not recognized by " + |
| "CertAttrSet:PolicyConstraints."); |
| } |
| encodeThis(); |
| } |
| |
| /** |
| * Get the attribute value. |
| */ |
| public Integer get(String name) throws IOException { |
| if (name.equalsIgnoreCase(REQUIRE)) { |
| return new Integer(require); |
| } else if (name.equalsIgnoreCase(INHIBIT)) { |
| return new Integer(inhibit); |
| } else { |
| throw new IOException("Attribute name not recognized by " + |
| "CertAttrSet:PolicyConstraints."); |
| } |
| } |
| |
| /** |
| * Delete the attribute value. |
| */ |
| public void delete(String name) throws IOException { |
| if (name.equalsIgnoreCase(REQUIRE)) { |
| require = -1; |
| } else if (name.equalsIgnoreCase(INHIBIT)) { |
| inhibit = -1; |
| } else { |
| throw new IOException("Attribute name not recognized by " + |
| "CertAttrSet:PolicyConstraints."); |
| } |
| encodeThis(); |
| } |
| |
| /** |
| * Return an enumeration of names of attributes existing within this |
| * attribute. |
| */ |
| public Enumeration<String> getElements() { |
| AttributeNameEnumeration elements = new AttributeNameEnumeration(); |
| elements.addElement(REQUIRE); |
| elements.addElement(INHIBIT); |
| |
| return (elements.elements()); |
| } |
| |
| /** |
| * Return the name of this attribute. |
| */ |
| public String getName() { |
| return (NAME); |
| } |
| } |