98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
/*
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* Copyright 2015 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.bitmessage.entity.payload;
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import ch.dissem.bitmessage.entity.BitmessageAddress;
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import ch.dissem.bitmessage.entity.Encrypted;
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import ch.dissem.bitmessage.entity.Plaintext;
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import ch.dissem.bitmessage.entity.PlaintextHolder;
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import ch.dissem.bitmessage.exception.DecryptionFailedException;
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import java.io.IOException;
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import static ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST;
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import static ch.dissem.bitmessage.utils.Singleton.security;
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/**
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* Users who are subscribed to the sending address will see the message appear in their inbox.
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* Broadcasts are version 4 or 5.
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*/
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public abstract class Broadcast extends ObjectPayload implements Encrypted, PlaintextHolder {
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protected final long stream;
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protected CryptoBox encrypted;
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protected Plaintext plaintext;
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protected Broadcast(long version, long stream, CryptoBox encrypted, Plaintext plaintext) {
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super(version);
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this.stream = stream;
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this.encrypted = encrypted;
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this.plaintext = plaintext;
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}
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public static long getVersion(BitmessageAddress address) {
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return address.getVersion() < 4 ? 4 : 5;
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}
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@Override
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public boolean isSigned() {
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return true;
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}
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@Override
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public byte[] getSignature() {
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return plaintext.getSignature();
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}
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@Override
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public void setSignature(byte[] signature) {
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plaintext.setSignature(signature);
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}
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@Override
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public long getStream() {
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return stream;
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}
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@Override
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public Plaintext getPlaintext() {
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return plaintext;
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}
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@Override
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public void encrypt(byte[] publicKey) throws IOException {
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this.encrypted = new CryptoBox(plaintext, publicKey);
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}
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public void encrypt() throws IOException {
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encrypt(security().createPublicKey(plaintext.getFrom().getPublicDecryptionKey()));
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}
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@Override
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public void decrypt(byte[] privateKey) throws IOException, DecryptionFailedException {
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plaintext = Plaintext.read(BROADCAST, encrypted.decrypt(privateKey));
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}
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public void decrypt(BitmessageAddress address) throws IOException, DecryptionFailedException {
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decrypt(address.getPublicDecryptionKey());
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}
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@Override
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public boolean isDecrypted() {
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return plaintext != null;
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}
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}
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