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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.conscrypt;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPublicKey;
import java.security.spec.DSAPublicKeySpec;
import java.security.spec.InvalidKeySpecException;
public class OpenSSLDSAPublicKey implements DSAPublicKey, OpenSSLKeyHolder {
private static final long serialVersionUID = 5238609500353792232L;
private transient OpenSSLKey key;
private transient OpenSSLDSAParams params;
OpenSSLDSAPublicKey(OpenSSLKey key) {
this.key = key;
}
@Override
public OpenSSLKey getOpenSSLKey() {
return key;
}
OpenSSLDSAPublicKey(DSAPublicKeySpec dsaKeySpec) throws InvalidKeySpecException {
try {
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA(
dsaKeySpec.getP().toByteArray(),
dsaKeySpec.getQ().toByteArray(),
dsaKeySpec.getG().toByteArray(),
dsaKeySpec.getY().toByteArray(),
null));
} catch (Exception e) {
throw new InvalidKeySpecException(e);
}
}
private void ensureReadParams() {
if (params == null) {
params = new OpenSSLDSAParams(key);
}
}
static OpenSSLKey getInstance(DSAPublicKey dsaPublicKey) throws InvalidKeyException {
try {
final DSAParams dsaParams = dsaPublicKey.getParams();
return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA(
dsaParams.getP().toByteArray(),
dsaParams.getQ().toByteArray(),
dsaParams.getG().toByteArray(),
dsaPublicKey.getY().toByteArray(),
null));
} catch (Exception e) {
throw new InvalidKeyException(e);
}
}
@Override
public DSAParams getParams() {
ensureReadParams();
/*
* DSA keys can lack parameters if they're part of a certificate
* chain. In this case, we just return null.
*/
if (!params.hasParams()) {
return null;
}
return params;
}
@Override
public String getAlgorithm() {
return "DSA";
}
@Override
public String getFormat() {
return "X.509";
}
@Override
public byte[] getEncoded() {
return NativeCrypto.i2d_PUBKEY(key.getPkeyContext());
}
@Override
public BigInteger getY() {
ensureReadParams();
return params.getY();
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (o instanceof OpenSSLDSAPublicKey) {
OpenSSLDSAPublicKey other = (OpenSSLDSAPublicKey) o;
/*
* We can shortcut the true case, but it still may be equivalent but
* different copies.
*/
if (key.equals(other.getOpenSSLKey())) {
return true;
}
}
if (!(o instanceof DSAPublicKey)) {
return false;
}
ensureReadParams();
DSAPublicKey other = (DSAPublicKey) o;
return params.getY().equals(other.getY()) && params.equals(other.getParams());
}
@Override
public int hashCode() {
ensureReadParams();
return params.getY().hashCode() ^ params.hashCode();
}
@Override
public String toString() {
ensureReadParams();
final StringBuilder sb = new StringBuilder("OpenSSLDSAPublicKey{");
sb.append("Y=");
sb.append(params.getY().toString(16));
sb.append(',');
sb.append("params=");
sb.append(params.toString());
sb.append('}');
return sb.toString();
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
stream.defaultReadObject();
final BigInteger g = (BigInteger) stream.readObject();
final BigInteger p = (BigInteger) stream.readObject();
final BigInteger q = (BigInteger) stream.readObject();
final BigInteger y = (BigInteger) stream.readObject();
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_DSA(
p.toByteArray(),
q.toByteArray(),
g.toByteArray(),
y.toByteArray(),
null));
}
private void writeObject(ObjectOutputStream stream) throws IOException {
if (getOpenSSLKey().isEngineBased()) {
throw new NotSerializableException("engine-based keys can not be serialized");
}
stream.defaultWriteObject();
ensureReadParams();
stream.writeObject(params.getG());
stream.writeObject(params.getP());
stream.writeObject(params.getQ());
stream.writeObject(params.getY());
}
}
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