Source Code Cross Referenced for AES128CBC.java in  » Net » JSch » com » jcraft » jsch » jce » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » JSch » com.jcraft.jsch.jce 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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