J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2002 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.provider; |
| 27 | |
| 28 | import java.util.*; |
| 29 | import java.io.*; |
| 30 | import java.math.BigInteger; |
| 31 | import java.security.InvalidKeyException; |
| 32 | import java.security.ProviderException; |
| 33 | import java.security.AlgorithmParameters; |
| 34 | import java.security.spec.DSAParameterSpec; |
| 35 | import java.security.spec.InvalidParameterSpecException; |
| 36 | import java.security.interfaces.DSAParams; |
| 37 | |
| 38 | import sun.security.x509.AlgIdDSA; |
| 39 | import sun.security.pkcs.PKCS8Key; |
| 40 | import sun.security.util.Debug; |
| 41 | import sun.security.util.DerValue; |
| 42 | import sun.security.util.DerInputStream; |
| 43 | import sun.security.util.DerOutputStream; |
| 44 | |
| 45 | /** |
| 46 | * A PKCS#8 private key for the Digital Signature Algorithm. |
| 47 | * |
| 48 | * @author Benjamin Renaud |
| 49 | * |
| 50 | * |
| 51 | * @see DSAPublicKey |
| 52 | * @see AlgIdDSA |
| 53 | * @see DSA |
| 54 | */ |
| 55 | |
| 56 | public final class DSAPrivateKey extends PKCS8Key |
| 57 | implements java.security.interfaces.DSAPrivateKey, Serializable { |
| 58 | |
| 59 | /** use serialVersionUID from JDK 1.1. for interoperability */ |
| 60 | private static final long serialVersionUID = -3244453684193605938L; |
| 61 | |
| 62 | /* the private key */ |
| 63 | private BigInteger x; |
| 64 | |
| 65 | /* |
| 66 | * Keep this constructor for backwards compatibility with JDK1.1. |
| 67 | */ |
| 68 | public DSAPrivateKey() { |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Make a DSA private key out of a private key and three parameters. |
| 73 | */ |
| 74 | public DSAPrivateKey(BigInteger x, BigInteger p, |
| 75 | BigInteger q, BigInteger g) |
| 76 | throws InvalidKeyException { |
| 77 | this.x = x; |
| 78 | algid = new AlgIdDSA(p, q, g); |
| 79 | |
| 80 | try { |
| 81 | key = new DerValue(DerValue.tag_Integer, |
| 82 | x.toByteArray()).toByteArray(); |
| 83 | encode(); |
| 84 | } catch (IOException e) { |
| 85 | InvalidKeyException ike = new InvalidKeyException( |
| 86 | "could not DER encode x: " + e.getMessage()); |
| 87 | ike.initCause(e); |
| 88 | throw ike; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Make a DSA private key from its DER encoding (PKCS #8). |
| 94 | */ |
| 95 | public DSAPrivateKey(byte[] encoded) throws InvalidKeyException { |
| 96 | clearOldKey(); |
| 97 | decode(encoded); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Returns the DSA parameters associated with this key, or null if the |
| 102 | * parameters could not be parsed. |
| 103 | */ |
| 104 | public DSAParams getParams() { |
| 105 | try { |
| 106 | if (algid instanceof DSAParams) { |
| 107 | return (DSAParams)algid; |
| 108 | } else { |
| 109 | DSAParameterSpec paramSpec; |
| 110 | AlgorithmParameters algParams = algid.getParameters(); |
| 111 | if (algParams == null) { |
| 112 | return null; |
| 113 | } |
| 114 | paramSpec = algParams.getParameterSpec(DSAParameterSpec.class); |
| 115 | return (DSAParams)paramSpec; |
| 116 | } |
| 117 | } catch (InvalidParameterSpecException e) { |
| 118 | return null; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Get the raw private key, x, without the parameters. |
| 124 | * |
| 125 | * @see getParameters |
| 126 | */ |
| 127 | public BigInteger getX() { |
| 128 | return x; |
| 129 | } |
| 130 | |
| 131 | private void clearOldKey() { |
| 132 | int i; |
| 133 | if (this.encodedKey != null) { |
| 134 | for (i = 0; i < this.encodedKey.length; i++) { |
| 135 | this.encodedKey[i] = (byte)0x00; |
| 136 | } |
| 137 | } |
| 138 | if (this.key != null) { |
| 139 | for (i = 0; i < this.key.length; i++) { |
| 140 | this.key[i] = (byte)0x00; |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | public String toString() { |
| 146 | return "Sun DSA Private Key \nparameters:" + algid + "\nx: " + |
| 147 | Debug.toHexString(x) + "\n"; |
| 148 | } |
| 149 | |
| 150 | protected void parseKeyBits() throws InvalidKeyException { |
| 151 | try { |
| 152 | DerInputStream in = new DerInputStream(key); |
| 153 | x = in.getBigInteger(); |
| 154 | } catch (IOException e) { |
| 155 | InvalidKeyException ike = new InvalidKeyException(e.getMessage()); |
| 156 | ike.initCause(e); |
| 157 | throw ike; |
| 158 | } |
| 159 | } |
| 160 | } |