1/*
2 * Copyright (c) 1998, 1999, 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 sun.security.pkcs;
27
28import java.io.*;
29import sun.security.x509.*;
30import sun.security.util.DerValue;
31import sun.security.util.DerOutputStream;
32
33/**
34 * This class implements the <code>EncryptedPrivateKeyInfo</code> type,
35 * which is defined in PKCS #8 as follows:
36 *
37 * <pre>
38 * EncryptedPrivateKeyInfo ::=  SEQUENCE {
39 *     encryptionAlgorithm   AlgorithmIdentifier,
40 *     encryptedData   OCTET STRING }
41 * </pre>
42 *
43 * @author Jan Luehe
44 *
45 */
46
47public class EncryptedPrivateKeyInfo {
48
49    // the "encryptionAlgorithm" field
50    private AlgorithmId algid;
51
52    // the "encryptedData" field
53    private byte[] encryptedData;
54
55    // the ASN.1 encoded contents of this class
56    private byte[] encoded;
57
58    /**
59     * Constructs (i.e., parses) an <code>EncryptedPrivateKeyInfo</code> from
60     * its encoding.
61     */
62    public EncryptedPrivateKeyInfo(byte[] encoded)
63        throws IOException
64    {
65        if (encoded == null) {
66            throw new IllegalArgumentException("encoding must not be null");
67        }
68
69        DerValue val = new DerValue(encoded);
70
71        DerValue[] seq = new DerValue[2];
72
73        seq[0] = val.data.getDerValue();
74        seq[1] = val.data.getDerValue();
75
76        if (val.data.available() != 0) {
77            throw new IOException("overrun, bytes = " + val.data.available());
78        }
79
80        this.algid = AlgorithmId.parse(seq[0]);
81        if (seq[0].data.available() != 0) {
82            throw new IOException("encryptionAlgorithm field overrun");
83        }
84
85        this.encryptedData = seq[1].getOctetString();
86        if (seq[1].data.available() != 0)
87            throw new IOException("encryptedData field overrun");
88
89        this.encoded = encoded.clone();
90    }
91
92    /**
93     * Constructs an <code>EncryptedPrivateKeyInfo</code> from the
94     * encryption algorithm and the encrypted data.
95     */
96    public EncryptedPrivateKeyInfo(AlgorithmId algid, byte[] encryptedData) {
97        this.algid = algid;
98        this.encryptedData = encryptedData.clone();
99    }
100
101    /**
102     * Returns the encryption algorithm.
103     */
104    public AlgorithmId getAlgorithm() {
105        return this.algid;
106    }
107
108    /**
109     * Returns the encrypted data.
110     */
111    public byte[] getEncryptedData() {
112        return this.encryptedData.clone();
113    }
114
115    /**
116     * Returns the ASN.1 encoding of this class.
117     */
118    public byte[] getEncoded()
119        throws IOException
120    {
121        if (this.encoded != null) return this.encoded.clone();
122
123        DerOutputStream out = new DerOutputStream();
124        DerOutputStream tmp = new DerOutputStream();
125
126        // encode encryption algorithm
127        algid.encode(tmp);
128
129        // encode encrypted data
130        tmp.putOctetString(encryptedData);
131
132        // wrap everything into a SEQUENCE
133        out.write(DerValue.tag_Sequence, tmp);
134        this.encoded = out.toByteArray();
135
136        return this.encoded.clone();
137    }
138
139    public boolean equals(Object other) {
140        if (this == other)
141            return true;
142        if (!(other instanceof EncryptedPrivateKeyInfo))
143            return false;
144        try {
145            byte[] thisEncrInfo = this.getEncoded();
146            byte[] otherEncrInfo
147                = ((EncryptedPrivateKeyInfo)other).getEncoded();
148
149            if (thisEncrInfo.length != otherEncrInfo.length)
150                return false;
151            for (int i = 0; i < thisEncrInfo.length; i++)
152                 if (thisEncrInfo[i] != otherEncrInfo[i])
153                     return false;
154            return true;
155        } catch (IOException e) {
156            return false;
157        }
158    }
159
160    /**
161     * Returns a hashcode for this EncryptedPrivateKeyInfo.
162     *
163     * @return a hashcode for this EncryptedPrivateKeyInfo.
164     */
165    public int hashCode() {
166        int retval = 0;
167
168        for (int i = 0; i < this.encryptedData.length; i++)
169            retval += this.encryptedData[i] * i;
170        return retval;
171    }
172}
173