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c38a8aa699
1) Generate a Curve25519 identity key. 2) Use Curve25519 ephemerals and identities for v2 3DHE agreements. 3) Initiate v2 key exchange messages. 4) Accept v1 key exchange messages. 5) TOFU Curve25519 identities.
82 lines
2.6 KiB
Java
82 lines
2.6 KiB
Java
/**
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* Copyright (C) 2011 Whisper Systems
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* Copyright (C) 2013 Open Whisper Systems
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.whispersystems.textsecure.crypto;
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import android.util.Log;
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import org.whispersystems.textsecure.crypto.ecc.ECKeyPair;
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import org.whispersystems.textsecure.crypto.ecc.ECPrivateKey;
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import org.whispersystems.textsecure.util.Hex;
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import org.whispersystems.textsecure.util.Util;
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/**
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* Represents a session's active KeyPair.
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*
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* @author Moxie Marlinspike
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*/
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public class KeyPair {
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private PublicKey publicKey;
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private ECPrivateKey privateKey;
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private final MasterCipher masterCipher;
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public KeyPair(int keyPairId, ECKeyPair keyPair, MasterSecret masterSecret) {
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this.masterCipher = new MasterCipher(masterSecret);
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this.publicKey = new PublicKey(keyPairId, keyPair.getPublicKey());
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this.privateKey = keyPair.getPrivateKey();
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}
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public KeyPair(byte[] bytes, MasterCipher masterCipher) throws InvalidKeyException {
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this.masterCipher = masterCipher;
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deserialize(bytes);
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}
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public int getId() {
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return publicKey.getId();
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}
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public PublicKey getPublicKey() {
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return publicKey;
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}
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public ECPrivateKey getPrivateKey() {
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return privateKey;
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}
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public byte[] toBytes() {
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return serialize();
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}
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private void deserialize(byte[] bytes) throws InvalidKeyException {
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this.publicKey = new PublicKey(bytes);
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byte[] privateKeyBytes = new byte[bytes.length - PublicKey.KEY_SIZE];
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System.arraycopy(bytes, PublicKey.KEY_SIZE, privateKeyBytes, 0, privateKeyBytes.length);
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this.privateKey = masterCipher.decryptKey(this.publicKey.getType(), privateKeyBytes);
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}
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public byte[] serialize() {
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byte[] publicKeyBytes = publicKey.serialize();
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Log.w("KeyPair", "Serialized public key bytes: " + Hex.toString(publicKeyBytes));
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byte[] privateKeyBytes = masterCipher.encryptKey(privateKey);
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return Util.combine(publicKeyBytes, privateKeyBytes);
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}
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}
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