| /* Random.java -- SSL Random structure. |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is a 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 of the License, 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; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, 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.javax.net.ssl.provider; |
| |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| /** |
| * An SSL nonce. |
| * |
| * <pre> |
| struct |
| { |
| uint32 gmt_unix_time; |
| opaque random_bytes[28]; |
| } Random; |
| */ |
| public class Random implements Builder, Constructed |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------- |
| |
| static final int RANDOM_LENGTH = 28; |
| |
| private final ByteBuffer buffer; |
| |
| // Constructors. |
| // ------------------------------------------------------------------------- |
| |
| public Random (final ByteBuffer buffer) |
| { |
| this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN); |
| } |
| |
| public Random copy() |
| { |
| ByteBuffer buffer = ByteBuffer.allocate(32); |
| buffer.put((ByteBuffer) this.buffer.duplicate().position(0)); |
| return new Random(buffer); |
| } |
| |
| public int length() |
| { |
| return RANDOM_LENGTH + 4; |
| } |
| |
| public ByteBuffer buffer() |
| { |
| return ((ByteBuffer) buffer.duplicate().position(0).limit(length())).slice(); |
| } |
| |
| public int gmtUnixTime () |
| { |
| return buffer.getInt(0); |
| } |
| |
| public byte[] randomBytes() |
| { |
| byte[] buf = new byte[28]; |
| buffer.position (4); |
| buffer.get (buf); |
| return buf; |
| } |
| |
| public void setGmtUnixTime (final int gmtUnixTime) |
| { |
| buffer.putInt (0, gmtUnixTime); |
| } |
| |
| public void setRandomBytes (final byte[] randomBytes) |
| { |
| setRandomBytes (randomBytes, 0); |
| } |
| |
| public void setRandomBytes (final byte[] randomBytes, final int offset) |
| { |
| if (randomBytes.length - offset < RANDOM_LENGTH) |
| throw new IllegalArgumentException ("random value too short"); |
| buffer.position (4); |
| buffer.put (randomBytes, offset, RANDOM_LENGTH); |
| } |
| |
| public String toString (final String prefix) |
| { |
| StringWriter str = new StringWriter(); |
| PrintWriter out = new PrintWriter(str); |
| if (prefix != null) |
| out.print (prefix); |
| out.println("struct {"); |
| if (prefix != null) |
| out.print (prefix); |
| out.print (" gmt_unix_time: "); |
| out.print (gmtUnixTime ()); |
| out.println (";"); |
| if (prefix != null) |
| out.print (prefix); |
| out.print (" random_bytes: "); |
| out.print (Util.toHexString (randomBytes (), ':')); |
| out.println (";"); |
| if (prefix != null) |
| out.print (prefix); |
| out.print ("} Random;"); |
| return str.toString(); |
| } |
| |
| public String toString () |
| { |
| return toString (null); |
| } |
| } |