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/**
* Copyright (C) 2013 Open Whisper Systems
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.whispersystems.libaxolotl;
import com.google.protobuf.ByteString;
import com.google.protobuf.InvalidProtocolBufferException;
import org.whispersystems.libaxolotl.ecc.Curve;
import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
import static org.whispersystems.libaxolotl.state.StorageProtos.IdentityKeyPairStructure;
/**
* Holder for public and private identity key pair.
*
* @author Moxie Marlinspike
*/
public class IdentityKeyPair {
private final IdentityKey publicKey;
private final ECPrivateKey privateKey;
public IdentityKeyPair(IdentityKey publicKey, ECPrivateKey privateKey) {
this.publicKey = publicKey;
this.privateKey = privateKey;
}
public IdentityKeyPair(byte[] serialized) throws InvalidKeyException {
try {
IdentityKeyPairStructure structure = IdentityKeyPairStructure.parseFrom(serialized);
this.publicKey = new IdentityKey(structure.getPublicKey().toByteArray(), 0);
this.privateKey = Curve.decodePrivatePoint(structure.getPrivateKey().toByteArray());
} catch (InvalidProtocolBufferException e) {
throw new InvalidKeyException(e);
}
}
public IdentityKey getPublicKey() {
return publicKey;
}
public ECPrivateKey getPrivateKey() {
return privateKey;
}
public byte[] serialize() {
return IdentityKeyPairStructure.newBuilder()
.setPublicKey(ByteString.copyFrom(publicKey.serialize()))
.setPrivateKey(ByteString.copyFrom(privateKey.serialize()))
.build().toByteArray();
}
}
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