/*
* Copyright (C)2009 - SSHJ Contributors
*
* 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 net.schmizz.sshj.transport.kex;
import net.schmizz.sshj.transport.digest.Digest;
import net.schmizz.sshj.transport.digest.SHA256;
import net.schmizz.sshj.transport.digest.SHA384;
import net.schmizz.sshj.transport.digest.SHA512;
import org.bouncycastle.jce.spec.ECNamedCurveGenParameterSpec;
import java.security.GeneralSecurityException;
public class ECDHNistP extends AbstractDHG {
private String curve;
/** Named factory for ECDHNistP key exchange */
public static class Factory521
implements net.schmizz.sshj.common.Factory.Named<KeyExchange> {
@Override
public KeyExchange create() {
return new ECDHNistP("P-521", new SHA512());
}
@Override
public String getName() {
return "ecdh-sha2-nistp521";
}
}
/** Named factory for ECDHNistP key exchange */
public static class Factory384
implements net.schmizz.sshj.common.Factory.Named<KeyExchange> {
@Override
public KeyExchange create() {
return new ECDHNistP("P-384", new SHA384());
}
@Override
public String getName() {
return "ecdh-sha2-nistp384";
}
}
/** Named factory for ECDHNistP key exchange */
public static class Factory256
implements net.schmizz.sshj.common.Factory.Named<KeyExchange> {
@Override
public KeyExchange create() {
return new ECDHNistP("P-256", new SHA256());
}
@Override
public String getName() {
return "ecdh-sha2-nistp256";
}
}
public ECDHNistP(String curve, Digest digest) {
super(new ECDH(), digest);
this.curve = curve;
}
@Override
protected void initDH(DHBase dh) throws GeneralSecurityException {
dh.init(new ECNamedCurveGenParameterSpec(curve), trans.getConfig().getRandomFactory());
}
}