1/*
2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.crypto.provider;
27
28import java.io.*;
29import java.security.AlgorithmParametersSpi;
30import java.security.spec.AlgorithmParameterSpec;
31import java.security.spec.InvalidParameterSpecException;
32
33/**
34 * This class implements the parameter (IV) used with the DES algorithm in
35 * feedback-mode. IV is defined in the standards as follows:
36 *
37 * <pre>
38 * IV ::= OCTET STRING  -- 8 octets
39 * </pre>
40 *
41 * @author Jan Luehe
42 *
43 */
44
45public final class DESParameters extends AlgorithmParametersSpi {
46
47    private BlockCipherParamsCore core;
48
49    public DESParameters() {
50        core = new BlockCipherParamsCore(DESConstants.DES_BLOCK_SIZE);
51    }
52
53    protected void engineInit(AlgorithmParameterSpec paramSpec)
54        throws InvalidParameterSpecException {
55        core.init(paramSpec);
56    }
57
58    protected void engineInit(byte[] encoded)
59        throws IOException {
60        core.init(encoded);
61    }
62
63    protected void engineInit(byte[] encoded, String decodingMethod)
64        throws IOException {
65        core.init(encoded, decodingMethod);
66    }
67
68    protected <T extends AlgorithmParameterSpec>
69        T engineGetParameterSpec(Class<T> paramSpec)
70        throws InvalidParameterSpecException {
71        if (AlgorithmParameterSpec.class.isAssignableFrom(paramSpec)) {
72            return core.getParameterSpec(paramSpec);
73        } else {
74            throw new InvalidParameterSpecException
75                ("Inappropriate parameter Specification");
76        }
77    }
78
79    protected byte[] engineGetEncoded() throws IOException {
80        return core.getEncoded();
81    }
82
83    protected byte[] engineGetEncoded(String encodingMethod)
84        throws IOException {
85        return core.getEncoded();
86    }
87
88    protected String engineToString() {
89        return core.toString();
90    }
91}
92