Mercurial > 510Connectbot
annotate src/ch/ethz/ssh2/crypto/cipher/BlockCipherFactory.java @ 381:95188bd4badb
cleanup help pages
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Wed, 06 Aug 2014 10:38:50 -0700 |
| parents | 8c1451f51a5e |
| children |
| 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.cipher; |
|
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.util.ArrayList; |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
8 import java.util.List; |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
9 import java.util.Vector; |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
10 |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
11 /** |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
12 * BlockCipherFactory. |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
13 * |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
14 * @author Christian Plattner |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
15 * @version $Id: BlockCipherFactory.java 86 2014-04-07 14:15:18Z dkocher@sudo.ch $ |
|
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
16 */ |
| 307 | 17 public class BlockCipherFactory { |
| 18 private static final class CipherEntry { | |
| 19 String type; | |
| 20 int blocksize; | |
| 21 int keysize; | |
| 22 String cipherClass; | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
23 |
| 307 | 24 public CipherEntry(String type, int blockSize, int keySize, String cipherClass) { |
| 25 this.type = type; | |
| 26 this.blocksize = blockSize; | |
| 27 this.keysize = keySize; | |
| 28 this.cipherClass = cipherClass; | |
| 29 } | |
| 30 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
31 |
| 307 | 32 private static final List<CipherEntry> ciphers = new ArrayList<CipherEntry>(); |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
33 |
| 307 | 34 static { |
|
375
8c1451f51a5e
kex error fixed; order encryption, hash, and kex algorithms properly, strongest preferred
Carl Byington <carl@five-ten-sg.com>
parents:
307
diff
changeset
|
35 // Higher priority (stronger) first |
| 307 | 36 ciphers.add(new CipherEntry("aes256-ctr", 16, 32, "ch.ethz.ssh2.crypto.cipher.AES")); |
|
375
8c1451f51a5e
kex error fixed; order encryption, hash, and kex algorithms properly, strongest preferred
Carl Byington <carl@five-ten-sg.com>
parents:
307
diff
changeset
|
37 ciphers.add(new CipherEntry("aes192-ctr", 16, 24, "ch.ethz.ssh2.crypto.cipher.AES")); |
|
8c1451f51a5e
kex error fixed; order encryption, hash, and kex algorithms properly, strongest preferred
Carl Byington <carl@five-ten-sg.com>
parents:
307
diff
changeset
|
38 ciphers.add(new CipherEntry("aes128-ctr", 16, 16, "ch.ethz.ssh2.crypto.cipher.AES")); |
| 307 | 39 ciphers.add(new CipherEntry("blowfish-ctr", 8, 16, "ch.ethz.ssh2.crypto.cipher.BlowFish")); |
|
375
8c1451f51a5e
kex error fixed; order encryption, hash, and kex algorithms properly, strongest preferred
Carl Byington <carl@five-ten-sg.com>
parents:
307
diff
changeset
|
40 ciphers.add(new CipherEntry("aes256-cbc", 16, 32, "ch.ethz.ssh2.crypto.cipher.AES")); |
|
8c1451f51a5e
kex error fixed; order encryption, hash, and kex algorithms properly, strongest preferred
Carl Byington <carl@five-ten-sg.com>
parents:
307
diff
changeset
|
41 ciphers.add(new CipherEntry("aes192-cbc", 16, 24, "ch.ethz.ssh2.crypto.cipher.AES")); |
| 307 | 42 ciphers.add(new CipherEntry("aes128-cbc", 16, 16, "ch.ethz.ssh2.crypto.cipher.AES")); |
| 43 ciphers.add(new CipherEntry("blowfish-cbc", 8, 16, "ch.ethz.ssh2.crypto.cipher.BlowFish")); | |
| 44 ciphers.add(new CipherEntry("3des-ctr", 8, 24, "ch.ethz.ssh2.crypto.cipher.DESede")); | |
| 45 ciphers.add(new CipherEntry("3des-cbc", 8, 24, "ch.ethz.ssh2.crypto.cipher.DESede")); | |
| 46 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
47 |
| 307 | 48 public static String[] getDefaultCipherList() { |
| 49 List<String> list = new ArrayList<String>(ciphers.size()); | |
| 50 | |
| 51 for (CipherEntry ce : ciphers) { | |
| 52 list.add(ce.type); | |
| 53 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
54 |
| 307 | 55 return list.toArray(new String[ciphers.size()]); |
| 56 } | |
| 57 | |
| 58 public static void checkCipherList(String[] cipherCandidates) { | |
| 59 for (String cipherCandidate : cipherCandidates) { | |
| 60 getEntry(cipherCandidate); | |
| 61 } | |
| 62 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
63 |
| 307 | 64 // @SuppressWarnings("rawtypes") |
| 65 public static BlockCipher createCipher(String type, boolean encrypt, byte[] key, byte[] iv) { | |
| 66 try { | |
| 67 CipherEntry ce = getEntry(type); | |
| 68 Class<?> cc = Class.forName(ce.cipherClass); | |
| 69 BlockCipher bc = (BlockCipher) cc.newInstance(); | |
| 70 | |
| 71 if (type.endsWith("-cbc")) { | |
| 72 bc.init(encrypt, key); | |
| 73 return new CBCMode(bc, iv, encrypt); | |
| 74 } | |
| 75 else if (type.endsWith("-ctr")) { | |
| 76 bc.init(true, key); | |
| 77 return new CTRMode(bc, iv, encrypt); | |
| 78 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
79 |
| 307 | 80 throw new IllegalArgumentException("Cannot instantiate " + type); |
| 81 } | |
| 82 catch (ClassNotFoundException e) { | |
| 83 throw new IllegalArgumentException("Cannot instantiate " + type, e); | |
| 84 } | |
| 85 catch (InstantiationException e) { | |
| 86 throw new IllegalArgumentException("Cannot instantiate " + type, e); | |
| 87 } | |
| 88 catch (IllegalAccessException e) { | |
| 89 throw new IllegalArgumentException("Cannot instantiate " + type, e); | |
| 90 } | |
| 91 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
92 |
| 307 | 93 private static CipherEntry getEntry(String type) { |
| 94 for (CipherEntry ce : ciphers) { | |
| 95 if (ce.type.equals(type)) { | |
| 96 return ce; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 throw new IllegalArgumentException("Unkown algorithm " + type); | |
| 101 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
102 |
| 307 | 103 public static int getBlockSize(String type) { |
| 104 CipherEntry ce = getEntry(type); | |
| 105 return ce.blocksize; | |
| 106 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
107 |
| 307 | 108 public static int getKeySize(String type) { |
| 109 CipherEntry ce = getEntry(type); | |
| 110 return ce.keysize; | |
| 111 } | |
|
273
91a31873c42a
start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
112 } |