1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.conscrypt; 18 19 import java.io.IOException; 20 import java.io.NotSerializableException; 21 import java.io.ObjectInputStream; 22 import java.io.ObjectOutputStream; 23 import java.math.BigInteger; 24 import java.security.InvalidKeyException; 25 import java.security.interfaces.DSAParams; 26 import java.security.interfaces.DSAPublicKey; 27 import java.security.spec.DSAPublicKeySpec; 28 import java.security.spec.InvalidKeySpecException; 29 30 public class OpenSSLDSAPublicKey implements DSAPublicKey, OpenSSLKeyHolder { 31 private static final long serialVersionUID = 5238609500353792232L; 32 33 private transient OpenSSLKey key; 34 35 private transient OpenSSLDSAParams params; 36 37 OpenSSLDSAPublicKey(OpenSSLKey key) { 38 this.key = key; 39 } 40 41 @Override 42 public OpenSSLKey getOpenSSLKey() { 43 return key; 44 } 45 46 OpenSSLDSAPublicKey(DSAPublicKeySpec dsaKeySpec) throws InvalidKeySpecException { 47 try { 48 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA( 49 dsaKeySpec.getP().toByteArray(), 50 dsaKeySpec.getQ().toByteArray(), 51 dsaKeySpec.getG().toByteArray(), 52 dsaKeySpec.getY().toByteArray(), 53 null)); 54 } catch (Exception e) { 55 throw new InvalidKeySpecException(e); 56 } 57 } 58 59 private void ensureReadParams() { 60 if (params == null) { 61 params = new OpenSSLDSAParams(key); 62 } 63 } 64 65 static OpenSSLKey getInstance(DSAPublicKey dsaPublicKey) throws InvalidKeyException { 66 try { 67 final DSAParams dsaParams = dsaPublicKey.getParams(); 68 return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA( 69 dsaParams.getP().toByteArray(), 70 dsaParams.getQ().toByteArray(), 71 dsaParams.getG().toByteArray(), 72 dsaPublicKey.getY().toByteArray(), 73 null)); 74 } catch (Exception e) { 75 throw new InvalidKeyException(e); 76 } 77 } 78 79 @Override 80 public DSAParams getParams() { 81 ensureReadParams(); 82 83 /* 84 * DSA keys can lack parameters if they're part of a certificate 85 * chain. In this case, we just return null. 86 */ 87 if (!params.hasParams()) { 88 return null; 89 } 90 91 return params; 92 } 93 94 @Override 95 public String getAlgorithm() { 96 return "DSA"; 97 } 98 99 @Override 100 public String getFormat() { 101 return "X.509"; 102 } 103 104 @Override 105 public byte[] getEncoded() { 106 return NativeCrypto.i2d_PUBKEY(key.getPkeyContext()); 107 } 108 109 @Override 110 public BigInteger getY() { 111 ensureReadParams(); 112 return params.getY(); 113 } 114 115 @Override 116 public boolean equals(Object o) { 117 if (o == this) { 118 return true; 119 } 120 121 if (o instanceof OpenSSLDSAPublicKey) { 122 OpenSSLDSAPublicKey other = (OpenSSLDSAPublicKey) o; 123 124 /* 125 * We can shortcut the true case, but it still may be equivalent but 126 * different copies. 127 */ 128 if (key.equals(other.getOpenSSLKey())) { 129 return true; 130 } 131 } 132 133 if (!(o instanceof DSAPublicKey)) { 134 return false; 135 } 136 137 ensureReadParams(); 138 139 DSAPublicKey other = (DSAPublicKey) o; 140 return params.getY().equals(other.getY()) && params.equals(other.getParams()); 141 } 142 143 @Override 144 public int hashCode() { 145 ensureReadParams(); 146 147 return params.getY().hashCode() ^ params.hashCode(); 148 } 149 150 @Override 151 public String toString() { 152 ensureReadParams(); 153 154 final StringBuilder sb = new StringBuilder("OpenSSLDSAPublicKey{"); 155 sb.append("Y="); 156 sb.append(params.getY().toString(16)); 157 sb.append(','); 158 sb.append("params="); 159 sb.append(params.toString()); 160 sb.append('}'); 161 162 return sb.toString(); 163 } 164 165 private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { 166 stream.defaultReadObject(); 167 168 final BigInteger g = (BigInteger) stream.readObject(); 169 final BigInteger p = (BigInteger) stream.readObject(); 170 final BigInteger q = (BigInteger) stream.readObject(); 171 final BigInteger y = (BigInteger) stream.readObject(); 172 173 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA( 174 p.toByteArray(), 175 q.toByteArray(), 176 g.toByteArray(), 177 y.toByteArray(), 178 null)); 179 } 180 181 private void writeObject(ObjectOutputStream stream) throws IOException { 182 if (getOpenSSLKey().isEngineBased()) { 183 throw new NotSerializableException("engine-based keys can not be serialized"); 184 } 185 stream.defaultWriteObject(); 186 187 ensureReadParams(); 188 stream.writeObject(params.getG()); 189 stream.writeObject(params.getP()); 190 stream.writeObject(params.getQ()); 191 stream.writeObject(params.getY()); 192 } 193 } 194
