J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.crypto.provider; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import sun.security.x509.AlgorithmId; |
| 30 | import sun.security.util.*; |
| 31 | |
| 32 | /** |
| 33 | * This class implements the <code>EncryptedPrivateKeyInfo</code> type, |
| 34 | * which is defined in PKCS #8 as follows: |
| 35 | * |
| 36 | * <pre> |
| 37 | * EncryptedPrivateKeyInfo ::= SEQUENCE { |
| 38 | * encryptionAlgorithm AlgorithmIdentifier, |
| 39 | * encryptedData OCTET STRING } |
| 40 | * </pre> |
| 41 | * |
| 42 | * @author Jan Luehe |
| 43 | */ |
| 44 | final class EncryptedPrivateKeyInfo { |
| 45 | |
| 46 | // the "encryptionAlgorithm" field |
| 47 | private AlgorithmId algid; |
| 48 | |
| 49 | // the "encryptedData" field |
| 50 | private byte[] encryptedData; |
| 51 | |
| 52 | // the ASN.1 encoded contents of this class |
| 53 | private byte[] encoded; |
| 54 | |
| 55 | /** |
| 56 | * Constructs (i.e., parses) an <code>EncryptedPrivateKeyInfo</code> from |
| 57 | * its encoding. |
| 58 | */ |
| 59 | EncryptedPrivateKeyInfo(byte[] encoded) throws IOException { |
| 60 | DerValue val = new DerValue(encoded); |
| 61 | |
| 62 | DerValue[] seq = new DerValue[2]; |
| 63 | |
| 64 | seq[0] = val.data.getDerValue(); |
| 65 | seq[1] = val.data.getDerValue(); |
| 66 | |
| 67 | if (val.data.available() != 0) { |
| 68 | throw new IOException("overrun, bytes = " + val.data.available()); |
| 69 | } |
| 70 | |
| 71 | this.algid = AlgorithmId.parse(seq[0]); |
| 72 | if (seq[0].data.available() != 0) { |
| 73 | throw new IOException("encryptionAlgorithm field overrun"); |
| 74 | } |
| 75 | |
| 76 | this.encryptedData = seq[1].getOctetString(); |
| 77 | if (seq[1].data.available() != 0) |
| 78 | throw new IOException("encryptedData field overrun"); |
| 79 | |
| 80 | this.encoded = (byte[])encoded.clone(); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Constructs an <code>EncryptedPrivateKeyInfo</code> from the |
| 85 | * encryption algorithm and the encrypted data. |
| 86 | */ |
| 87 | EncryptedPrivateKeyInfo(AlgorithmId algid, byte[] encryptedData) { |
| 88 | this.algid = algid; |
| 89 | this.encryptedData = (byte[])encryptedData.clone(); |
| 90 | this.encoded = null; // lazy generation of encoding |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Returns the encryption algorithm. |
| 95 | */ |
| 96 | AlgorithmId getAlgorithm() { |
| 97 | return this.algid; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Returns the encrypted data. |
| 102 | */ |
| 103 | byte[] getEncryptedData() { |
| 104 | return (byte[])this.encryptedData.clone(); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Returns the ASN.1 encoding of this class. |
| 109 | */ |
| 110 | byte[] getEncoded() |
| 111 | throws IOException |
| 112 | { |
| 113 | if (this.encoded != null) return (byte[])this.encoded.clone(); |
| 114 | |
| 115 | DerOutputStream out = new DerOutputStream(); |
| 116 | DerOutputStream tmp = new DerOutputStream(); |
| 117 | |
| 118 | // encode encryption algorithm |
| 119 | algid.encode(tmp); |
| 120 | |
| 121 | // encode encrypted data |
| 122 | tmp.putOctetString(encryptedData); |
| 123 | |
| 124 | // wrap everything into a SEQUENCE |
| 125 | out.write(DerValue.tag_Sequence, tmp); |
| 126 | this.encoded = out.toByteArray(); |
| 127 | |
| 128 | return (byte[])this.encoded.clone(); |
| 129 | } |
| 130 | } |