93 lines
3.7 KiB
Java
93 lines
3.7 KiB
Java
/**
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*
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* Copyright 2018 Paul Schaub.
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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 org.jivesoftware.smackx.ox;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import org.jivesoftware.smack.chat2.Chat;
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import org.jivesoftware.smack.packet.ExtensionElement;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smackx.eme.element.ExplicitMessageEncryptionElement;
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import org.jivesoftware.smackx.hints.element.StoreHint;
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import org.jivesoftware.smackx.ox.element.OpenPgpElement;
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import org.jivesoftware.smackx.ox.element.SigncryptElement;
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import org.jivesoftware.smackx.ox.exception.MissingOpenPgpKeyPairException;
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import org.jivesoftware.smackx.ox.exception.MissingOpenPgpPublicKeyException;
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import org.jxmpp.jid.Jid;
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public class OpenPgpEncryptedChat {
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private final Chat chat;
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private final OpenPgpFingerprints contactsFingerprints;
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private final OpenPgpFingerprints ourFingerprints;
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private final OpenPgpProvider cryptoProvider;
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private final OpenPgpV4Fingerprint singingKey;
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public OpenPgpEncryptedChat(OpenPgpProvider cryptoProvider,
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Chat chat,
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OpenPgpFingerprints ourFingerprints,
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OpenPgpFingerprints contactsFingerprints) {
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this.cryptoProvider = cryptoProvider;
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this.chat = chat;
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this.singingKey = cryptoProvider.primaryOpenPgpKeyPairFingerprint();
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this.ourFingerprints = ourFingerprints;
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this.contactsFingerprints = contactsFingerprints;
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}
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public void send(Message message, List<ExtensionElement> payload)
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throws MissingOpenPgpKeyPairException {
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Set<OpenPgpV4Fingerprint> encryptionFingerprints = new HashSet<>(contactsFingerprints.getActiveKeys());
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encryptionFingerprints.addAll(ourFingerprints.getActiveKeys());
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SigncryptElement preparedPayload = new SigncryptElement(
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Collections.<Jid>singleton(chat.getXmppAddressOfChatPartner()),
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payload);
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OpenPgpElement encryptedPayload;
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// Encrypt the payload
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try {
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encryptedPayload = cryptoProvider.signAndEncrypt(
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preparedPayload,
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singingKey,
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encryptionFingerprints);
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} catch (MissingOpenPgpPublicKeyException e) {
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throw new AssertionError("Missing OpenPGP public key, even though this should not happen here.", e);
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}
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// Add encrypted payload to message
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message.addExtension(encryptedPayload);
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// Add additional information to the message
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message.addExtension(new ExplicitMessageEncryptionElement(
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ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.openpgpV0));
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StoreHint.set(message);
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message.setBody("This message is encrypted using XEP-0374: OpenPGP for XMPP: Instant Messaging.");
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}
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public void send(Message message, CharSequence body)
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throws MissingOpenPgpKeyPairException {
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List<ExtensionElement> payload = new ArrayList<>();
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payload.add(new Message.Body(null, body.toString()));
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send(message, payload);
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}
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}
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