/* * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.crypto.provider; import java.io.*; import sun.security.x509.AlgorithmId; import sun.security.util.*; /** * This class implements the EncryptedPrivateKeyInfo type, * which is defined in PKCS #8 as follows: * *
 * EncryptedPrivateKeyInfo ::=  SEQUENCE {
 *     encryptionAlgorithm   AlgorithmIdentifier,
 *     encryptedData   OCTET STRING }
 * 
* * @author Jan Luehe */ final class EncryptedPrivateKeyInfo { // the "encryptionAlgorithm" field private AlgorithmId algid; // the "encryptedData" field private byte[] encryptedData; // the ASN.1 encoded contents of this class private byte[] encoded; /** * Constructs (i.e., parses) an EncryptedPrivateKeyInfo from * its encoding. */ EncryptedPrivateKeyInfo(byte[] encoded) throws IOException { DerValue val = new DerValue(encoded); DerValue[] seq = new DerValue[2]; seq[0] = val.data.getDerValue(); seq[1] = val.data.getDerValue(); if (val.data.available() != 0) { throw new IOException("overrun, bytes = " + val.data.available()); } this.algid = AlgorithmId.parse(seq[0]); if (seq[0].data.available() != 0) { throw new IOException("encryptionAlgorithm field overrun"); } this.encryptedData = seq[1].getOctetString(); if (seq[1].data.available() != 0) throw new IOException("encryptedData field overrun"); this.encoded = (byte[])encoded.clone(); } /** * Constructs an EncryptedPrivateKeyInfo from the * encryption algorithm and the encrypted data. */ EncryptedPrivateKeyInfo(AlgorithmId algid, byte[] encryptedData) { this.algid = algid; this.encryptedData = (byte[])encryptedData.clone(); this.encoded = null; // lazy generation of encoding } /** * Returns the encryption algorithm. */ AlgorithmId getAlgorithm() { return this.algid; } /** * Returns the encrypted data. */ byte[] getEncryptedData() { return (byte[])this.encryptedData.clone(); } /** * Returns the ASN.1 encoding of this class. */ byte[] getEncoded() throws IOException { if (this.encoded != null) return (byte[])this.encoded.clone(); DerOutputStream out = new DerOutputStream(); DerOutputStream tmp = new DerOutputStream(); // encode encryption algorithm algid.encode(tmp); // encode encrypted data tmp.putOctetString(encryptedData); // wrap everything into a SEQUENCE out.write(DerValue.tag_Sequence, tmp); this.encoded = out.toByteArray(); return (byte[])this.encoded.clone(); } }