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DES1KeySecretKeyFactoryEngine |
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1 /* $RCSfile: DES1KeySecretKeyFactoryEngine.java,v $
2 * $Revision: 1.9 $
3 * $Date: 2003/10/04 19:18:38 $
4 * $Author: uwe_guenther $
5 * $State: Exp $
6 *
7 * Created on August 13, 2001 9:45 PM
8 *
9 * Copyright (C) 2001 Uwe Guenther <uwe@cscc.de>
10 *
11 * This file is part of the jhbci JCE-ServiceProvider. The jhbci JCE-
12 * ServiceProvider is a library, written in JavaTM, that should be
13 * used in HBCI banking applications (clients and may be servers),
14 * to do cryptographic operations.
15 *
16 * The jhbci library is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU Lesser General Public
18 * License as published by the Free Software Foundation; either
19 * version 2.1 of the License, or (at your option) any later version.
20 *
21 * The jhbci library is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * Lesser General Public License for more details.
25 *
26 * You should have received a copy of the GNU Lesser General Public
27 * License along with this library; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 *
30 */
31
32 package de.cscc.crypto.provider;
33
34 import java.security.InvalidKeyException;
35 import java.security.spec.InvalidKeySpecException;
36 import java.security.spec.KeySpec;
37
38 import javax.crypto.SecretKey;
39 import javax.crypto.SecretKeyFactorySpi;
40
41
42 /**
43 * DES1KeySecretKeyFactoryEngine Class.
44 *
45 * @author <a href=mailto:uwe@cscc.de>Uwe Günther</a>
46 * @version $Revision: 1.9 $
47 */
48 public final class DES1KeySecretKeyFactoryEngine extends SecretKeyFactorySpi {
49
50 /** The delegate for this wrapper object */
51 private DES1KeySecretKeyFactoryImpl factory =
52 new DES1KeySecretKeyFactoryImpl();
53
54 /**
55 * Creates new DES1KeySecretKeyFactoryEngine.
56 *
57 * @throws SecurityException if the provider self integrity check fails.
58 */
59 public DES1KeySecretKeyFactoryEngine() {
60 if (JHBCI.selfIntegrityChecking() == false) {
61 throw new SecurityException("JHBCI-Provider is tampered.");
62 }
63 }
64
65 /**
66 * Returns a string representation of the object.
67 *
68 * @return a string representation of the object.
69 */
70 public String toString() {
71 return this.factory.toString();
72 }
73
74 /**
75 * Generates a <code>SecretKey</code> object from the
76 * provided key specification (key material).
77 *
78 * @param keySpec the specification (key material) of the secret key.
79 * @return the secret key.
80 * @throws NullPointerException if keySpec is null.
81 * @throws InvalidKeySpecException if the given key specification
82 * is inappropriate for this secret-key factory to produce a secret key.
83 */
84 protected SecretKey engineGenerateSecret(KeySpec keySpec)
85 throws InvalidKeySpecException {
86 return this.factory.generateSecret(keySpec);
87 }
88
89
90 /**
91 * Returns a specification (key material) of the given key object in the
92 * requested format.
93 *
94 * @param key the key.
95 * @param keySpec the requested format in which the key material shall be
96 * returned.
97 * @return the underlying key specification (key material) in the requested
98 * format.
99 * @throws NullPointerException if key or keySpec is null.
100 * @throws InvalidKeySpecException if the requested key specification is
101 * inappropriate for the given key (e.g., the algorithms associated with
102 * <code>key</code> and <code>keySpec</code> do not match, or
103 * <code>key</code> references a key on a cryptographic hardware device
104 * whereas <code>keySpec</code> is the specification of a software-based
105 * key), or the given key cannot be dealt with (e.g., the given key has
106 * an algorithm or format not supported by this secret-key factory).
107 */
108 protected KeySpec engineGetKeySpec(SecretKey key, Class keySpec)
109 throws InvalidKeySpecException {
110 return this.factory.getKeySpec(key, keySpec);
111 }
112
113 /**
114 * Translates a key object, whose provider may be unknown or potentially
115 * untrusted, into a corresponding key object of this secret-key factory.
116 *
117 * @return they key whose provider is unknown or untrusted.
118 * @param key the key whose provider is unknown or untrusted.
119 * @throws NullPointerException if key is null.
120 * @throws InvalidKeyException if the given key cannot be processed by this
121 * secret-key factory.
122 */
123 protected SecretKey engineTranslateKey(SecretKey key)
124 throws InvalidKeyException {
125 return this.factory.translateKey(key);
126 }
127
128 }
129
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DES1KeySecretKeyFactoryEngine |
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