/*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package sun.security.pkcs12;
import java.io.*;
import java.security.*;
import sun.security.util.DerInputStream;
import sun.security.util.DerOutputStream;
import sun.security.util.DerValue;
import sun.security.x509.AlgorithmId;
import sun.security.pkcs.ParsingException;
/**
* A MacData type, as defined in PKCS#12.
*
* @author Sharon Liu
*/
class MacData {
private String digestAlgorithmName;
private AlgorithmParameters digestAlgorithmParams;
private byte[] digest;
private byte[] macSalt;
private int iterations;
// the ASN.1 encoded contents of this class
private byte[] encoded = null;
/**
* Parses a PKCS#12 MAC data.
*/
MacData(DerInputStream derin)
throws IOException, ParsingException
{
DerValue[] macData = derin.getSequence(2);
// Parse the digest info
DerInputStream digestIn = new DerInputStream(macData[0].toByteArray());
DerValue[] digestInfo = digestIn.getSequence(2);
// Parse the DigestAlgorithmIdentifier.
AlgorithmId digestAlgorithmId = AlgorithmId.parse(digestInfo[0]);
this.digestAlgorithmName = digestAlgorithmId.getName();
this.digestAlgorithmParams = digestAlgorithmId.getParameters();
// Get the digest.
this.digest = digestInfo[1].getOctetString();
// Get the salt.
this.macSalt = macData[1].getOctetString();
// Iterations is optional. The default value is 1.
if (macData.length > 2) {
this.iterations = macData[2].getInteger();
} else {
this.iterations = 1;
}
}
MacData(String algName, byte[] digest, byte[] salt, int iterations)
throws NoSuchAlgorithmException
{
if (algName == null)
throw new NullPointerException("the algName parameter " +
"must be non-null");
AlgorithmId algid = AlgorithmId.get(algName);
this.digestAlgorithmName = algid.getName();
this.digestAlgorithmParams = algid.getParameters();
if (digest == null) {
throw new NullPointerException("the digest " +
"parameter must be non-null");
} else if (digest.length == 0) {
throw new IllegalArgumentException("the digest " +
"parameter must not be empty");
} else {
this.digest = digest.clone();
}
this.macSalt = salt;
this.iterations = iterations;
// delay the generation of ASN.1 encoding until
// getEncoded() is called
this.encoded = null;
}
MacData(AlgorithmParameters algParams, byte[] digest,
byte[] salt, int iterations) throws NoSuchAlgorithmException
{
if (algParams == null)
throw new NullPointerException("the algParams parameter " +
"must be non-null");
AlgorithmId algid = AlgorithmId.get(algParams);
this.digestAlgorithmName = algid.getName();
this.digestAlgorithmParams = algid.getParameters();
if (digest == null) {
throw new NullPointerException("the digest " +
"parameter must be non-null");
} else if (digest.length == 0) {
throw new IllegalArgumentException("the digest " +
"parameter must not be empty");
} else {
this.digest = digest.clone();
}
this.macSalt = salt;
this.iterations = iterations;
// delay the generation of ASN.1 encoding until
// getEncoded() is called
this.encoded = null;
}
String getDigestAlgName() {
return digestAlgorithmName;
}
byte[] getSalt() {
return macSalt;
}
int getIterations() {
return iterations;
}
byte[] getDigest() {
return digest;
}
/**
* Returns the ASN.1 encoding of this object.
* @return the ASN.1 encoding.
* @exception IOException if error occurs when constructing its
* ASN.1 encoding.
*/
public byte[] getEncoded() throws NoSuchAlgorithmException, IOException
{
if (this.encoded != null)
return this.encoded.clone();
DerOutputStream out = new DerOutputStream();
DerOutputStream tmp = new DerOutputStream();
DerOutputStream tmp2 = new DerOutputStream();
// encode encryption algorithm
AlgorithmId algid = AlgorithmId.get(digestAlgorithmName);
algid.encode(tmp2);
// encode digest data
tmp2.putOctetString(digest);
tmp.write(DerValue.tag_Sequence, tmp2);
// encode salt
tmp.putOctetString(macSalt);
// encode iterations
tmp.putInteger(iterations);
// wrap everything into a SEQUENCE
out.write(DerValue.tag_Sequence, tmp);
this.encoded = out.toByteArray();
return this.encoded.clone();
}
}