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| 1 | /* | ||
| 2 | * Copyright (c) 2006, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.ec; | ||
| 27 | |||
| 28 | import java.io.IOException; | ||
| 29 | |||
| 30 | import java.security.*; | ||
| 31 | import java.security.interfaces.*; | ||
| 32 | import java.security.spec.*; | ||
| 33 | |||
| 34 | import sun.security.util.*; | ||
| 35 | import sun.security.x509.*; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * Key implementation for EC public keys. | ||
| 39 | * | ||
| 40 | * @since 1.6 | ||
| 41 | * @author Andreas Sterbenz | ||
| 42 | */ | ||
| 43 | public final class ECPublicKeyImpl extends X509Key implements ECPublicKey { | ||
| 44 | |||
| 45 | private static final long serialVersionUID = -2462037275160462289L; | ||
| 46 | |||
| 47 | private ECPoint w; | ||
| 48 | private ECParameterSpec params; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Construct a key from its components. Used by the | ||
| 52 | * ECKeyFactory and SunPKCS11. | ||
| 53 | */ | ||
| 54 | public ECPublicKeyImpl(ECPoint w, ECParameterSpec params) | ||
| 55 | throws InvalidKeyException { | ||
| 56 | this.w = w; | ||
| 57 | this.params = params; | ||
| 58 | // generate the encoding | ||
| 59 | algid = new AlgorithmId | ||
| 60 | (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params)); | ||
| 61 | key = ECParameters.encodePoint(w, params.getCurve()); | ||
| 62 | } | ||
| 63 | |||
| 64 | /** | ||
| 65 | * Construct a key from its encoding. Used by RSAKeyFactory. | ||
| 66 | */ | ||
| 67 | public ECPublicKeyImpl(byte[] encoded) throws InvalidKeyException { | ||
| 68 | decode(encoded); | ||
| 69 | } | ||
| 70 | |||
| 71 | // see JCA doc | ||
| 72 | public String getAlgorithm() { | ||
| 73 | return "EC"; | ||
| 74 | } | ||
| 75 | |||
| 76 | // see JCA doc | ||
| 77 | public ECPoint getW() { | ||
| 78 | return w; | ||
| 79 | } | ||
| 80 | |||
| 81 | // see JCA doc | ||
| 82 | public ECParameterSpec getParams() { | ||
| 83 | return params; | ||
| 84 | } | ||
| 85 | |||
| 86 | // Internal API to get the encoded point. Currently used by SunPKCS11. | ||
| 87 | // This may change/go away depending on what we do with the public API. | ||
| 88 | public byte[] getEncodedPublicValue() { | ||
| 89 | return key.clone(); | ||
| 90 | } | ||
| 91 | |||
| 92 | /** | ||
| 93 | * Parse the key. Called by X509Key. | ||
| 94 | */ | ||
| 95 | protected void parseKeyBits() throws InvalidKeyException { | ||
| 96 | try { | ||
| 97 | AlgorithmParameters algParams = this.algid.getParameters(); | ||
| 98 | params = algParams.getParameterSpec(ECParameterSpec.class); | ||
| 99 | w = ECParameters.decodePoint(key, params.getCurve()); | ||
| 100 | } catch (IOException e) { | ||
| 101 | throw new InvalidKeyException("Invalid EC key", e); | ||
| 102 | } catch (InvalidParameterSpecException e) { | ||
| 103 | throw new InvalidKeyException("Invalid EC key", e); | ||
| 104 | } | ||
| 105 | } | ||
| 106 | |||
| 107 | // return a string representation of this key for debugging | ||
| 108 | public String toString() { | ||
| 109 | return "Sun EC public key, " + params.getCurve().getField().getFieldSize() | ||
| 110 | + " bits\n public x coord: " + w.getAffineX() | ||
| 111 | + "\n public y coord: " + w.getAffineY() | ||
| 112 | + "\n parameters: " + params; | ||
| 113 | } | ||
| 114 | |||
| 115 | protected Object writeReplace() throws java.io.ObjectStreamException { | ||
| 116 | return new KeyRep(KeyRep.Type.PUBLIC, | ||
| 117 | getAlgorithm(), | ||
| 118 | getFormat(), | ||
| 119 | getEncoded()); | ||
| 120 | } | ||
| 121 | } | ||