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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2007, 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 | |||
| 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 | } | ||