| /* |
| * Copyright (c) 1997, 2004, 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.*; |
| |
| import sun.security.util.*; |
| |
| /** |
| * Represent the GeneralSubtree ASN.1 object, whose syntax is: |
| * <pre> |
| * GeneralSubtree ::= SEQUENCE { |
| * base GeneralName, |
| * minimum [0] BaseDistance DEFAULT 0, |
| * maximum [1] BaseDistance OPTIONAL |
| * } |
| * BaseDistance ::= INTEGER (0..MAX) |
| * </pre> |
| * @author Amit Kapoor |
| * @author Hemma Prafullchandra |
| */ |
| public class GeneralSubtree { |
| private static final byte TAG_MIN = 0; |
| private static final byte TAG_MAX = 1; |
| private static final int MIN_DEFAULT = 0; |
| |
| private GeneralName name; |
| private int minimum = MIN_DEFAULT; |
| private int maximum = -1; |
| |
| private int myhash = -1; |
| |
| /** |
| * The default constructor for the class. |
| * |
| * @params name the GeneralName |
| * @params min the minimum BaseDistance |
| * @params max the maximum BaseDistance |
| */ |
| public GeneralSubtree(GeneralName name, int min, int max) { |
| this.name = name; |
| this.minimum = min; |
| this.maximum = max; |
| } |
| |
| /** |
| * Create the object from its DER encoded form. |
| * |
| * @param val the DER encoded from of the same. |
| */ |
| public GeneralSubtree(DerValue val) throws IOException { |
| if (val.tag != DerValue.tag_Sequence) { |
| throw new IOException("Invalid encoding for GeneralSubtree."); |
| } |
| name = new GeneralName(val.data.getDerValue(), true); |
| |
| // NB. this is always encoded with the IMPLICIT tag |
| // The checks only make sense if we assume implicit tagging, |
| // with explicit tagging the form is always constructed. |
| while (val.data.available() != 0) { |
| DerValue opt = val.data.getDerValue(); |
| |
| if (opt.isContextSpecific(TAG_MIN) && !opt.isConstructed()) { |
| opt.resetTag(DerValue.tag_Integer); |
| minimum = opt.getInteger(); |
| |
| } else if (opt.isContextSpecific(TAG_MAX) && !opt.isConstructed()) { |
| opt.resetTag(DerValue.tag_Integer); |
| maximum = opt.getInteger(); |
| } else |
| throw new IOException("Invalid encoding of GeneralSubtree."); |
| } |
| } |
| |
| /** |
| * Return the GeneralName. |
| * |
| * @return the GeneralName |
| */ |
| public GeneralName getName() { |
| //XXXX May want to consider cloning this |
| return name; |
| } |
| |
| /** |
| * Return the minimum BaseDistance. |
| * |
| * @return the minimum BaseDistance. Default is 0 if not set. |
| */ |
| public int getMinimum() { |
| return minimum; |
| } |
| |
| /** |
| * Return the maximum BaseDistance. |
| * |
| * @return the maximum BaseDistance, or -1 if not set. |
| */ |
| public int getMaximum() { |
| return maximum; |
| } |
| |
| /** |
| * Return a printable string of the GeneralSubtree. |
| */ |
| public String toString() { |
| String s = "\n GeneralSubtree: [\n" + |
| " GeneralName: " + ((name == null) ? "" : name.toString()) + |
| "\n Minimum: " + minimum; |
| if (maximum == -1) { |
| s += "\t Maximum: undefined"; |
| } else |
| s += "\t Maximum: " + maximum; |
| s += " ]\n"; |
| return (s); |
| } |
| |
| /** |
| * Compare this GeneralSubtree with another |
| * |
| * @param other GeneralSubtree to compare to this |
| * @returns true if match |
| */ |
| public boolean equals(Object other) { |
| if (!(other instanceof GeneralSubtree)) |
| return false; |
| GeneralSubtree otherGS = (GeneralSubtree)other; |
| if (this.name == null) { |
| if (otherGS.name != null) { |
| return false; |
| } |
| } else { |
| if (!((this.name).equals(otherGS.name))) |
| return false; |
| } |
| if (this.minimum != otherGS.minimum) |
| return false; |
| if (this.maximum != otherGS.maximum) |
| return false; |
| return true; |
| } |
| |
| /** |
| * Returns the hash code for this GeneralSubtree. |
| * |
| * @return a hash code value. |
| */ |
| public int hashCode() { |
| if (myhash == -1) { |
| myhash = 17; |
| if (name != null) { |
| myhash = 37 * myhash + name.hashCode(); |
| } |
| if (minimum != MIN_DEFAULT) { |
| myhash = 37 * myhash + minimum; |
| } |
| if (maximum != -1) { |
| myhash = 37 * myhash + maximum; |
| } |
| } |
| return myhash; |
| } |
| |
| /** |
| * Encode the GeneralSubtree. |
| * |
| * @params out the DerOutputStream to encode this object to. |
| */ |
| public void encode(DerOutputStream out) throws IOException { |
| DerOutputStream seq = new DerOutputStream(); |
| |
| name.encode(seq); |
| |
| if (minimum != MIN_DEFAULT) { |
| DerOutputStream tmp = new DerOutputStream(); |
| tmp.putInteger(minimum); |
| seq.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, |
| false, TAG_MIN), tmp); |
| } |
| if (maximum != -1) { |
| DerOutputStream tmp = new DerOutputStream(); |
| tmp.putInteger(maximum); |
| seq.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, |
| false, TAG_MAX), tmp); |
| } |
| out.write(DerValue.tag_Sequence, seq); |
| } |
| } |