01: /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
02: /*
03: Copyright (c) 2005-2008 ymnk, JCraft,Inc. All rights reserved.
04:
05: Redistribution and use in source and binary forms, with or without
06: modification, are permitted provided that the following conditions are met:
07:
08: 1. Redistributions of source code must retain the above copyright notice,
09: 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 AES128CBC implements Cipher {
36: private static final int ivsize = 16;
37: private static final int bsize = 16;
38: private javax.crypto.Cipher cipher;
39:
40: public int getIVSize() {
41: return ivsize;
42: }
43:
44: public int getBlockSize() {
45: return bsize;
46: }
47:
48: public void init(int mode, byte[] key, byte[] iv) throws Exception {
49: String pad = "NoPadding";
50: byte[] tmp;
51: if (iv.length > ivsize) {
52: tmp = new byte[ivsize];
53: System.arraycopy(iv, 0, tmp, 0, tmp.length);
54: iv = tmp;
55: }
56: if (key.length > bsize) {
57: tmp = new byte[bsize];
58: System.arraycopy(key, 0, tmp, 0, tmp.length);
59: key = tmp;
60: }
61:
62: try {
63: SecretKeySpec keyspec = new SecretKeySpec(key, "AES");
64: cipher = javax.crypto.Cipher.getInstance("AES/CBC/" + pad);
65: cipher
66: .init(
67: (mode == ENCRYPT_MODE ? javax.crypto.Cipher.ENCRYPT_MODE
68: : javax.crypto.Cipher.DECRYPT_MODE),
69: keyspec, new IvParameterSpec(iv));
70: } catch (Exception e) {
71: cipher = null;
72: throw e;
73: }
74: }
75:
76: public void update(byte[] foo, int s1, int len, byte[] bar, int s2)
77: throws Exception {
78: cipher.update(foo, s1, len, bar, s2);
79: }
80: }
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