| /* BasicConstraints.java -- the basic constraints extension. |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.security.x509.ext; |
| |
| import gnu.java.security.OID; |
| import gnu.java.security.der.DER; |
| import gnu.java.security.der.DERReader; |
| import gnu.java.security.der.DERValue; |
| |
| import java.io.IOException; |
| import java.math.BigInteger; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class BasicConstraints extends Extension.Value |
| { |
| |
| // Constants and fields. |
| // ------------------------------------------------------------------------- |
| |
| public static final OID ID = new OID("2.5.29.19"); |
| |
| private final boolean ca; |
| private final int pathLenConstraint; |
| |
| // Constructor. |
| // ------------------------------------------------------------------------- |
| |
| public BasicConstraints(final byte[] encoded) throws IOException |
| { |
| super(encoded); |
| DERReader der = new DERReader(encoded); |
| DERValue bc = der.read(); |
| if (!bc.isConstructed()) |
| throw new IOException("malformed BasicConstraints"); |
| DERValue val = bc; |
| if (bc.getLength() > 0) |
| val = der.read(); |
| if (val.getTag() == DER.BOOLEAN) |
| { |
| ca = ((Boolean) val.getValue()).booleanValue(); |
| if (val.getEncodedLength() < bc.getLength()) |
| val = der.read(); |
| } |
| else |
| ca = false; |
| if (val.getTag() == DER.INTEGER) |
| { |
| pathLenConstraint = ((BigInteger) val.getValue()).intValue(); |
| } |
| else |
| pathLenConstraint = -1; |
| } |
| |
| public BasicConstraints (final boolean ca, final int pathLenConstraint) |
| { |
| this.ca = ca; |
| this.pathLenConstraint = pathLenConstraint; |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------- |
| |
| public boolean isCA() |
| { |
| return ca; |
| } |
| |
| public int getPathLengthConstraint() |
| { |
| return pathLenConstraint; |
| } |
| |
| public byte[] getEncoded() |
| { |
| if (encoded == null) |
| { |
| List bc = new ArrayList (2); |
| bc.add (new DERValue (DER.BOOLEAN, Boolean.valueOf (ca))); |
| if (pathLenConstraint >= 0) |
| bc.add (new DERValue (DER.INTEGER, |
| BigInteger.valueOf ((long) pathLenConstraint))); |
| encoded = new DERValue (DER.CONSTRUCTED|DER.SEQUENCE, bc).getEncoded(); |
| } |
| return (byte[]) encoded.clone(); |
| } |
| |
| public String toString() |
| { |
| return BasicConstraints.class.getName() + " [ isCA=" + ca + |
| " pathLen=" + pathLenConstraint + " ]"; |
| } |
| } |