author | valeriep |
Tue, 08 May 2012 17:57:48 -0700 | |
changeset 12685 | 8a448b5b9006 |
parent 10336 | 0bb1999251f8 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.crypto.provider; |
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import java.io.*; |
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import sun.security.x509.AlgorithmId; |
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import sun.security.util.*; |
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/** |
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* This class implements the <code>EncryptedPrivateKeyInfo</code> type, |
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* which is defined in PKCS #8 as follows: |
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* |
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* <pre> |
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* EncryptedPrivateKeyInfo ::= SEQUENCE { |
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* encryptionAlgorithm AlgorithmIdentifier, |
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* encryptedData OCTET STRING } |
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* </pre> |
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* |
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* @author Jan Luehe |
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*/ |
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final class EncryptedPrivateKeyInfo { |
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// the "encryptionAlgorithm" field |
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private AlgorithmId algid; |
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// the "encryptedData" field |
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private byte[] encryptedData; |
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// the ASN.1 encoded contents of this class |
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private byte[] encoded; |
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/** |
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* Constructs (i.e., parses) an <code>EncryptedPrivateKeyInfo</code> from |
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* its encoding. |
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*/ |
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EncryptedPrivateKeyInfo(byte[] encoded) throws IOException { |
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DerValue val = new DerValue(encoded); |
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DerValue[] seq = new DerValue[2]; |
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seq[0] = val.data.getDerValue(); |
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seq[1] = val.data.getDerValue(); |
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if (val.data.available() != 0) { |
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throw new IOException("overrun, bytes = " + val.data.available()); |
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} |
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this.algid = AlgorithmId.parse(seq[0]); |
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if (seq[0].data.available() != 0) { |
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throw new IOException("encryptionAlgorithm field overrun"); |
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} |
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this.encryptedData = seq[1].getOctetString(); |
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if (seq[1].data.available() != 0) |
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throw new IOException("encryptedData field overrun"); |
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parents:
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diff
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this.encoded = encoded.clone(); |
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} |
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/** |
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* Constructs an <code>EncryptedPrivateKeyInfo</code> from the |
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* encryption algorithm and the encrypted data. |
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*/ |
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EncryptedPrivateKeyInfo(AlgorithmId algid, byte[] encryptedData) { |
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this.algid = algid; |
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this.encryptedData = encryptedData.clone(); |
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this.encoded = null; // lazy generation of encoding |
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} |
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/** |
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* Returns the encryption algorithm. |
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*/ |
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AlgorithmId getAlgorithm() { |
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return this.algid; |
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} |
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/** |
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* Returns the encrypted data. |
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*/ |
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byte[] getEncryptedData() { |
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return this.encryptedData.clone(); |
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} |
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/** |
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* Returns the ASN.1 encoding of this class. |
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*/ |
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byte[] getEncoded() |
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throws IOException |
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{ |
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if (this.encoded != null) return this.encoded.clone(); |
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DerOutputStream out = new DerOutputStream(); |
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DerOutputStream tmp = new DerOutputStream(); |
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// encode encryption algorithm |
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algid.encode(tmp); |
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// encode encrypted data |
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tmp.putOctetString(encryptedData); |
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// wrap everything into a SEQUENCE |
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out.write(DerValue.tag_Sequence, tmp); |
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this.encoded = out.toByteArray(); |
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return this.encoded.clone(); |
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} |
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} |