| /* |
| * Copyright (c) 1996, 2002, 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 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; |
| } |
| } |
| } |