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-rw-r--r--java/com/jcraft/jsch/jce/ARCFOUR128.java71
1 files changed, 71 insertions, 0 deletions
diff --git a/java/com/jcraft/jsch/jce/ARCFOUR128.java b/java/com/jcraft/jsch/jce/ARCFOUR128.java
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+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/*
+Copyright (c) 2008-2012 ymnk, JCraft,Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the distribution.
+
+ 3. The names of the authors may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
+INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package com.jcraft.jsch.jce;
+
+import com.jcraft.jsch.Cipher;
+import javax.crypto.*;
+import javax.crypto.spec.*;
+
+public class ARCFOUR128 implements Cipher{
+ private static final int ivsize=8;
+ private static final int bsize=16;
+ private static final int skip=1536;
+ private javax.crypto.Cipher cipher;
+ public int getIVSize(){return ivsize;}
+ public int getBlockSize(){return bsize;}
+ public void init(int mode, byte[] key, byte[] iv) throws Exception{
+ byte[] tmp;
+ if(key.length>bsize){
+ tmp=new byte[bsize];
+ System.arraycopy(key, 0, tmp, 0, tmp.length);
+ key=tmp;
+ }
+ try{
+ cipher=javax.crypto.Cipher.getInstance("RC4");
+ SecretKeySpec _key = new SecretKeySpec(key, "RC4");
+ cipher.init((mode==ENCRYPT_MODE?
+ javax.crypto.Cipher.ENCRYPT_MODE:
+ javax.crypto.Cipher.DECRYPT_MODE),
+ _key);
+ byte[] foo=new byte[1];
+ for(int i=0; i<skip; i++){
+ cipher.update(foo, 0, 1, foo, 0);
+ }
+ }
+ catch(Exception e){
+ cipher=null;
+ throw e;
+ }
+ }
+ public void update(byte[] foo, int s1, int len, byte[] bar, int s2) throws Exception{
+ cipher.update(foo, s1, len, bar, s2);
+ }
+ public boolean isCBC(){return false; }
+}