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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.
60 lines
2.1 KiB
Java
60 lines
2.1 KiB
Java
/**
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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 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.Util;
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public class PreKeyPair {
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private final MasterCipher masterCipher;
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private final PreKeyPublic publicKey;
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private final ECPrivateKey privateKey;
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public PreKeyPair(MasterSecret masterSecret, ECKeyPair keyPair) {
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this.masterCipher = new MasterCipher(masterSecret);
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this.publicKey = new PreKeyPublic(keyPair.getPublicKey());
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this.privateKey = keyPair.getPrivateKey();
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}
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public PreKeyPair(MasterSecret masterSecret, byte[] serialized) throws InvalidKeyException {
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byte[] privateKeyBytes = new byte[serialized.length - PreKeyPublic.KEY_SIZE];
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System.arraycopy(serialized, PreKeyPublic.KEY_SIZE, privateKeyBytes, 0, privateKeyBytes.length);
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this.masterCipher = new MasterCipher(masterSecret);
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this.publicKey = new PreKeyPublic(serialized, 0);
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this.privateKey = masterCipher.decryptKey(this.publicKey.getType(), privateKeyBytes);
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}
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public PreKeyPublic getPublicKey() {
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return publicKey;
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}
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public ECKeyPair getKeyPair() {
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return new ECKeyPair(publicKey.getPublicKey(), privateKey);
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}
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public byte[] serialize() {
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byte[] publicKeyBytes = publicKey.serialize();
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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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