| /* GnuDSAPrivateKey.java --- Gnu DSA Private Key |
| Copyright (C) 1999,2003,2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.security.provider; |
| |
| import gnu.java.security.OID; |
| import gnu.java.security.der.DER; |
| import gnu.java.security.der.DERValue; |
| import gnu.java.security.der.DERWriter; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import java.math.BigInteger; |
| |
| import java.security.interfaces.DSAPrivateKey; |
| import java.security.interfaces.DSAParams; |
| import java.security.spec.DSAParameterSpec; |
| |
| import java.util.ArrayList; |
| |
| public class GnuDSAPrivateKey implements DSAPrivateKey |
| { |
| private byte[] encodedKey; |
| BigInteger x; |
| BigInteger p; |
| BigInteger q; |
| BigInteger g; |
| |
| public GnuDSAPrivateKey(BigInteger x, BigInteger p, BigInteger q, BigInteger g ) |
| { |
| this.x = x; |
| this.p = p; |
| this.q = q; |
| this.g = g; |
| } |
| |
| public String getAlgorithm() |
| { |
| return "DSA"; |
| } |
| |
| public String getFormat() |
| { |
| return "PKCS#8"; |
| } |
| |
| /** |
| * Encodes this key as a <code>PrivateKeyInfo</code>, as described in |
| * PKCS #8. The ASN.1 specification for this structure is: |
| * |
| * <blockquote><pre> |
| * PrivateKeyInfo ::= SEQUENCE { |
| * version Version, |
| * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier, |
| * privateKey PrivateKey, |
| * attributes [0] IMPLICIT Attributes OPTIONAL } |
| * |
| * Version ::= INTEGER |
| * |
| * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier |
| * |
| * PrivateKey ::= OCTET STRING |
| * |
| * Attributes ::= SET OF Attribute |
| * </pre></blockquote> |
| * |
| * <p>DSA private keys (in Classpath at least) have no attributes. |
| */ |
| public byte[] getEncoded() |
| { |
| if (encodedKey != null) |
| return (byte[]) encodedKey.clone(); |
| try |
| { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| ArrayList pki = new ArrayList(3); |
| pki.add(new DERValue(DER.INTEGER, BigInteger.ZERO)); |
| ArrayList algId = new ArrayList(2); |
| algId.add(new DERValue(DER.OBJECT_IDENTIFIER, |
| new OID("1.2.840.10040.4.1"))); |
| ArrayList algParams = new ArrayList(3); |
| algParams.add(new DERValue(DER.INTEGER, p)); |
| algParams.add(new DERValue(DER.INTEGER, q)); |
| algParams.add(new DERValue(DER.INTEGER, g)); |
| algId.add(new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, algParams)); |
| pki.add(new DERValue(DER.OCTET_STRING, x.toByteArray())); |
| DERWriter.write(out, new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, pki)); |
| return (byte[]) (encodedKey = out.toByteArray()).clone(); |
| } |
| catch (IOException ioe) |
| { |
| return null; |
| } |
| } |
| |
| public DSAParams getParams() |
| { |
| return (DSAParams)(new DSAParameterSpec(p,q,g)); |
| } |
| |
| public BigInteger getX() |
| { |
| return x; |
| } |
| |
| public String toString() |
| { |
| return "GnuDSAPrivateKey: x=" |
| + (x != null ? x.toString(16) : "null") + " p=" |
| + (p != null ? p.toString(16) : "null") + " q=" |
| + (q != null ? q.toString(16) : "null") + " g=" |
| + (g != null ? g.toString(16) : "null"); |
| } |
| } |