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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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
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package sun.security.provider;
import java.util.*;
import java.io.*;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.ProviderException;
import java.security.AlgorithmParameters;
import java.security.spec.DSAParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import java.security.interfaces.DSAParams;
import sun.security.x509.AlgIdDSA;
import sun.security.pkcs.PKCS8Key;
import sun.security.util.Debug;
import sun.security.util.DerValue;
import sun.security.util.DerInputStream;
import sun.security.util.DerOutputStream;
/**
* A PKCS#8 private key for the Digital Signature Algorithm.
*
* @author Benjamin Renaud
*
*
* @see DSAPublicKey
* @see AlgIdDSA
* @see DSA
*/
public final class DSAPrivateKey extends PKCS8Key
implements java.security.interfaces.DSAPrivateKey, Serializable {
/** use serialVersionUID from JDK 1.1. for interoperability */
private static final long serialVersionUID = -3244453684193605938L;
/* the private key */
private BigInteger x;
/*
* Keep this constructor for backwards compatibility with JDK1.1.
*/
public DSAPrivateKey() {
}
/**
* Make a DSA private key out of a private key and three parameters.
*/
public DSAPrivateKey(BigInteger x, BigInteger p,
BigInteger q, BigInteger g)
throws InvalidKeyException {
this.x = x;
algid = new AlgIdDSA(p, q, g);
try {
key = new DerValue(DerValue.tag_Integer,
x.toByteArray()).toByteArray();
encode();
} catch (IOException e) {
InvalidKeyException ike = new InvalidKeyException(
"could not DER encode x: " + e.getMessage());
ike.initCause(e);
throw ike;
}
}
/**
* Make a DSA private key from its DER encoding (PKCS #8).
*/
public DSAPrivateKey(byte[] encoded) throws InvalidKeyException {
clearOldKey();
decode(encoded);
}
/**
* Returns the DSA parameters associated with this key, or null if the
* parameters could not be parsed.
*/
public DSAParams getParams() {
try {
if (algid instanceof DSAParams) {
return (DSAParams)algid;
} else {
DSAParameterSpec paramSpec;
AlgorithmParameters algParams = algid.getParameters();
if (algParams == null) {
return null;
}
paramSpec = algParams.getParameterSpec(DSAParameterSpec.class);
return (DSAParams)paramSpec;
}
} catch (InvalidParameterSpecException e) {
return null;
}
}
/**
* Get the raw private key, x, without the parameters.
*
* @see getParameters
*/
public BigInteger getX() {
return x;
}
private void clearOldKey() {
int i;
if (this.encodedKey != null) {
for (i = 0; i < this.encodedKey.length; i++) {
this.encodedKey[i] = (byte)0x00;
}
}
if (this.key != null) {
for (i = 0; i < this.key.length; i++) {
this.key[i] = (byte)0x00;
}
}
}
public String toString() {
return "Sun DSA Private Key \nparameters:" + algid + "\nx: " +
Debug.toHexString(x) + "\n";
}
protected void parseKeyBits() throws InvalidKeyException {
try {
DerInputStream in = new DerInputStream(key);
x = in.getBigInteger();
} catch (IOException e) {
InvalidKeyException ike = new InvalidKeyException(e.getMessage());
ike.initCause(e);
throw ike;
}
}
}