| /* DERValue.java -- a value read or written to a DER encoding. |
| Copyright (C) 2003 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.der; |
| |
| import gnu.java.security.x509.Util; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| public class DERValue implements DER |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------ |
| |
| private final int tagClass; |
| private final boolean constructed; |
| private final int tag; |
| private int length; |
| private final Object value; |
| private byte[] encoded; |
| |
| // Constructor. |
| // ------------------------------------------------------------------------ |
| |
| public DERValue(int tag, int length, Object value, byte[] encoded) |
| { |
| tagClass = tag & 0xC0; |
| this.tag = tag & 0x1F; |
| constructed = (tag & CONSTRUCTED) == CONSTRUCTED; |
| this.length = length; |
| this.value = value; |
| if (encoded != null) |
| this.encoded = (byte[]) encoded.clone(); |
| } |
| |
| public DERValue(int tag, Object value) |
| { |
| this(tag, 0, value, null); |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------ |
| |
| public int getExternalTag() |
| { |
| return tagClass | tag | (constructed ? 0x20 : 0x00); |
| } |
| |
| public int getTag() |
| { |
| return tag; |
| } |
| |
| public int getTagClass() |
| { |
| return tagClass; |
| } |
| |
| public boolean isConstructed() |
| { |
| return constructed; |
| } |
| |
| public int getLength() |
| { |
| if (encoded == null) |
| { |
| try |
| { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| length = DERWriter.write(out, this); |
| encoded = out.toByteArray(); |
| } |
| catch (IOException ioe) |
| { |
| IllegalArgumentException iae = new IllegalArgumentException (); |
| iae.initCause (ioe); |
| throw iae; |
| } |
| } |
| return length; |
| } |
| |
| public Object getValue() |
| { |
| return value; |
| } |
| |
| public Object getValueAs (final int derType) throws IOException |
| { |
| byte[] encoded = getEncoded (); |
| encoded[0] = (byte) derType; |
| return DERReader.read (encoded).getValue (); |
| } |
| |
| public byte[] getEncoded() |
| { |
| if (encoded == null) |
| { |
| try |
| { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| length = DERWriter.write(out, this); |
| encoded = out.toByteArray(); |
| } |
| catch (IOException ioe) |
| { |
| IllegalArgumentException iae = new IllegalArgumentException (); |
| iae.initCause (ioe); |
| throw iae; |
| } |
| } |
| return (byte[]) encoded.clone(); |
| } |
| |
| public int getEncodedLength() |
| { |
| if (encoded == null) |
| { |
| try |
| { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| length = DERWriter.write(out, this); |
| encoded = out.toByteArray(); |
| } |
| catch (IOException ioe) |
| { |
| IllegalArgumentException iae = new IllegalArgumentException (); |
| iae.initCause (ioe); |
| throw iae; |
| } |
| } |
| return encoded.length; |
| } |
| |
| public String toString() |
| { |
| String start = "DERValue ( ["; |
| if (tagClass == DER.UNIVERSAL) |
| start = start + "UNIVERSAL "; |
| else if (tagClass == DER.PRIVATE) |
| start = start + "PRIVATE "; |
| else if (tagClass == DER.APPLICATION) |
| start = start + "APPLICATION "; |
| start = start + tag + "] constructed=" + constructed + ", value="; |
| if (constructed) |
| start = start + "\n" + Util.hexDump(getEncoded(), "\t"); |
| else |
| start = start + value; |
| return start + " )"; |
| } |
| } |