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comparison src/main/java/com/glavsoft/rfb/protocol/auth/VncAuthentication.java @ 52:472a9bcacb21 draft default tip

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TightVNC 2.7.1.0
author you@cr.ie.u-ryukyu.ac.jp
date Wed, 07 Aug 2013 19:01:17 +0900
parents 4689cc86d6cb
children
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0:4689cc86d6cb 52:472a9bcacb21
1 // Copyright (C) 2010, 2011 GlavSoft LLC. 1 // Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC.
2 // All rights reserved. 2 // All rights reserved.
3 // 3 //
4 //------------------------------------------------------------------------- 4 //-------------------------------------------------------------------------
5 // This file is part of the TightVNC software. Please visit our Web site: 5 // This file is part of the TightVNC software. Please visit our Web site:
6 // 6 //
48 public boolean authenticate(Reader reader, 48 public boolean authenticate(Reader reader,
49 Writer writer, CapabilityContainer authCaps, IPasswordRetriever passwordRetriever) 49 Writer writer, CapabilityContainer authCaps, IPasswordRetriever passwordRetriever)
50 throws TransportException, FatalException { 50 throws TransportException, FatalException {
51 byte [] challenge = reader.readBytes(16); 51 byte [] challenge = reader.readBytes(16);
52 String password = passwordRetriever.getPassword(); 52 String password = passwordRetriever.getPassword();
53 if (null == password) return false;
53 byte [] key = new byte[8]; 54 byte [] key = new byte[8];
54 System.arraycopy(password.getBytes(), 0, key, 0, Math.min(key.length, password.getBytes().length)); 55 System.arraycopy(password.getBytes(), 0, key, 0, Math.min(key.length, password.getBytes().length));
55 writer.write(encrypt(challenge, key)); 56 writer.write(encrypt(challenge, key));
56 return false; 57 return false;
57 } 58 }
58 59
59 /** 60 /**
60 * Encript challenge by key using DES 61 * Encript challenge by key using DES
61 * @param challenge
62 * @param key
63 * @return encripted bytes 62 * @return encripted bytes
64 * @throws CryptoException on problem with DES algorithm support or smth about 63 * @throws CryptoException on problem with DES algorithm support or smth about
65 */ 64 */
66 public byte[] encrypt(byte[] challenge, byte[] key) throws CryptoException { 65 public byte[] encrypt(byte[] challenge, byte[] key) throws CryptoException {
67 try { 66 try {
68 DESKeySpec desKeySpec = new DESKeySpec(mirrorBits(key)); 67 DESKeySpec desKeySpec = new DESKeySpec(mirrorBits(key));
69 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); 68 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
70 SecretKey secretKey = keyFactory.generateSecret(desKeySpec); 69 SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
71 Cipher desCipher = Cipher.getInstance("DES/ECB/NoPadding"); 70 Cipher desCipher = Cipher.getInstance("DES/ECB/NoPadding");
72 desCipher.init(Cipher.ENCRYPT_MODE, secretKey); 71 desCipher.init(Cipher.ENCRYPT_MODE, secretKey);
73 byte[] textEncrypted = desCipher.doFinal(challenge); 72 return desCipher.doFinal(challenge);
74 return textEncrypted;
75 } catch (NoSuchAlgorithmException e) { 73 } catch (NoSuchAlgorithmException e) {
76 throw new CryptoException("Cannot encrypt challenge", e); 74 throw new CryptoException("Cannot encrypt challenge", e);
77 } catch (NoSuchPaddingException e) { 75 } catch (NoSuchPaddingException e) {
78 throw new CryptoException("Cannot encrypt challenge", e); 76 throw new CryptoException("Cannot encrypt challenge", e);
79 } catch (IllegalBlockSizeException e) { 77 } catch (IllegalBlockSizeException e) {