/* * 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.math.*; import java.io.*; import sun.security.x509.AlgorithmId; import sun.security.util.*; /** * This class implements the PrivateKeyInfo type, * which is defined in PKCS #8 as follows: * *
 * PrivateKeyInfo ::=  SEQUENCE {
 *     version   INTEGER,
 *     privateKeyAlgorithm   AlgorithmIdentifier,
 *     privateKey   OCTET STRING,
 *     attributes   [0] IMPLICIT Attributes OPTIONAL }
 * 
* * @author Jan Luehe */ final class PrivateKeyInfo { // the version number defined by the PKCS #8 standard private static final BigInteger VERSION = BigInteger.ZERO; // the private-key algorithm private AlgorithmId algid; // the private-key value private byte[] privkey; /** * Constructs a PKCS#8 PrivateKeyInfo from its ASN.1 encoding. */ PrivateKeyInfo(byte[] encoded) throws IOException { DerValue val = new DerValue(encoded); if (val.tag != DerValue.tag_Sequence) throw new IOException("private key parse error: not a sequence"); // version BigInteger parsedVersion = val.data.getBigInteger(); if (!parsedVersion.equals(VERSION)) { throw new IOException("version mismatch: (supported: " + VERSION + ", parsed: " + parsedVersion); } // privateKeyAlgorithm this.algid = AlgorithmId.parse(val.data.getDerValue()); // privateKey this.privkey = val.data.getOctetString(); // OPTIONAL attributes not supported yet } /** * Returns the private-key algorithm. */ AlgorithmId getAlgorithm() { return this.algid; } }