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1 | /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */ |
2 | /* | |
3 | Copyright (c) 2002-2010 ymnk, JCraft,Inc. All rights reserved. | |
4 | ||
5 | Redistribution and use in source and binary forms, with or without | |
6 | modification, are permitted provided that the following conditions are met: | |
7 | ||
8 | 1. Redistributions of source code must retain the above copyright notice, | |
9 | this list of conditions and the following disclaimer. | |
10 | ||
11 | 2. Redistributions in binary form must reproduce the above copyright | |
12 | notice, this list of conditions and the following disclaimer in | |
13 | the documentation and/or other materials provided with the distribution. | |
14 | ||
15 | 3. The names of the authors may not be used to endorse or promote products | |
16 | derived from this software without specific prior written permission. | |
17 | ||
18 | THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, | |
19 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
20 | FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT, | |
21 | INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, | |
22 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
23 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
24 | OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
25 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
26 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
27 | EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | package com.jcraft.jsch.jce; | |
31 | ||
32 | import com.jcraft.jsch.Cipher; | |
33 | import javax.crypto.spec.*; | |
34 | ||
35 | public class BlowfishCBC implements Cipher{ | |
36 | private static final int ivsize=8; | |
37 | private static final int bsize=16; | |
38 | private javax.crypto.Cipher cipher; | |
39 | public int getIVSize(){return ivsize;} | |
40 | public int getBlockSize(){return bsize;} | |
41 | public void init(int mode, byte[] key, byte[] iv) throws Exception{ | |
42 | String pad="NoPadding"; | |
43 | // if(padding) pad="PKCS5Padding"; | |
44 | byte[] tmp; | |
45 | if(iv.length>ivsize){ | |
46 | tmp=new byte[ivsize]; | |
47 | System.arraycopy(iv, 0, tmp, 0, tmp.length); | |
48 | iv=tmp; | |
49 | } | |
50 | if(key.length>bsize){ | |
51 | tmp=new byte[bsize]; | |
52 | System.arraycopy(key, 0, tmp, 0, tmp.length); | |
53 | key=tmp; | |
54 | } | |
55 | try{ | |
56 | SecretKeySpec skeySpec = new SecretKeySpec(key, "Blowfish"); | |
57 | cipher=javax.crypto.Cipher.getInstance("Blowfish/CBC/"+pad); | |
58 | cipher.init((mode==ENCRYPT_MODE? | |
59 | javax.crypto.Cipher.ENCRYPT_MODE: | |
60 | javax.crypto.Cipher.DECRYPT_MODE), | |
61 | skeySpec, new IvParameterSpec(iv)); | |
62 | } | |
63 | catch(Exception e){ | |
64 | throw e; | |
65 | } | |
66 | } | |
67 | public void update(byte[] foo, int s1, int len, byte[] bar, int s2) throws Exception{ | |
68 | cipher.update(foo, s1, len, bar, s2); | |
69 | } | |
70 | public boolean isCBC(){return true; } | |
71 | } |