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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 | +} | |