annotate src/ch/ethz/ssh2/crypto/digest/HMAC.java @ 357:46c2115ae1c8

update jzlib to a21be20213d66eff15904d925e9b721956a01ef7
author Carl Byington <carl@five-ten-sg.com>
date Fri, 01 Aug 2014 13:34:58 -0700
parents 071eccdff8ea
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
1 /*
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
3 * Please refer to the LICENSE.txt for licensing details.
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
4 */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
5 package ch.ethz.ssh2.crypto.digest;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
6
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
7 import java.security.DigestException;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
8
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
9 /**
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
10 * HMAC.
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
11 *
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
12 * @author Christian Plattner
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
13 * @version 2.50, 03/15/10
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
14 */
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
15 public final class HMAC implements Digest {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
16 Digest md;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
17 byte[] k_xor_ipad;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
18 byte[] k_xor_opad;
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
19
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
20 byte[] tmp;
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
21
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
22 int size;
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
23
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
24 public HMAC(Digest md, byte[] key, int size) throws DigestException {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
25 this.md = md;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
26 this.size = size;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
27 tmp = new byte[md.getDigestLength()];
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
28 final int BLOCKSIZE = 64;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
29 k_xor_ipad = new byte[BLOCKSIZE];
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
30 k_xor_opad = new byte[BLOCKSIZE];
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
31
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
32 if (key.length > BLOCKSIZE) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
33 md.reset();
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
34 md.update(key);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
35 md.digest(tmp);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
36 key = tmp;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
37 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
38
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
39 System.arraycopy(key, 0, k_xor_ipad, 0, key.length);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
40 System.arraycopy(key, 0, k_xor_opad, 0, key.length);
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
41
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
42 for (int i = 0; i < BLOCKSIZE; i++) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
43 k_xor_ipad[i] ^= 0x36;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
44 k_xor_opad[i] ^= 0x5C;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
45 }
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
46
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
47 md.update(k_xor_ipad);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
48 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
49
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
50 public final int getDigestLength() {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
51 return size;
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
52 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
53
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
54 public final void update(byte b) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
55 md.update(b);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
56 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
57
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
58 public final void update(byte[] b) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
59 md.update(b);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
60 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
61
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
62 public final void update(byte[] b, int off, int len) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
63 md.update(b, off, len);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
64 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
65
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
66 public final void reset() {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
67 md.reset();
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
68 md.update(k_xor_ipad);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
69 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
70
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
71 public final void digest(byte[] out) throws DigestException {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
72 digest(out, 0);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
73 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
74
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
75 public final void digest(byte[] out, int off) throws DigestException {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
76 md.digest(tmp);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
77 md.update(k_xor_opad);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
78 md.update(tmp);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
79 md.digest(tmp);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
80 System.arraycopy(tmp, 0, out, off, size);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
81 md.update(k_xor_ipad);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
82 }
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
83 }