264 lines
12 KiB
Java
264 lines
12 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.Date;
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import java.util.List;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.ox.element.PubkeyElement;
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import org.jivesoftware.smackx.ox.element.PublicKeysListElement;
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import org.jivesoftware.smackx.ox.element.SecretkeyElement;
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import org.jivesoftware.smackx.pubsub.AccessModel;
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import org.jivesoftware.smackx.pubsub.ConfigureForm;
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import org.jivesoftware.smackx.pubsub.Item;
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import org.jivesoftware.smackx.pubsub.LeafNode;
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import org.jivesoftware.smackx.pubsub.PayloadItem;
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import org.jivesoftware.smackx.pubsub.PubSubException;
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import org.jivesoftware.smackx.pubsub.PubSubManager;
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import org.jivesoftware.smackx.xdata.packet.DataForm;
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import org.jxmpp.jid.BareJid;
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public class PubSubDelegate {
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private static final Logger LOGGER = Logger.getLogger(PubSubDelegate.class.getName());
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/**
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* Name of the OX metadata node.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#announcing-pubkey-list">XEP-0373 §4.2</a>
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*/
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public static final String PEP_NODE_PUBLIC_KEYS = "urn:xmpp:openpgp:0:public-keys";
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/**
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* Name of the OX secret key node.
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*/
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public static final String PEP_NODE_SECRET_KEY = "urn:xmpp:openpgp:0:secret-key";
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/**
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* Feature to be announced using the {@link ServiceDiscoveryManager} to subscribe to the OX metadata node.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#pubsub-notifications">XEP-0373 §4.4</a>
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*/
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public static final String PEP_NODE_PUBLIC_KEYS_NOTIFY = PEP_NODE_PUBLIC_KEYS + "+notify";
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/**
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* Name of the OX public key node, which contains the key with id {@code id}.
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*
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* @param id upper case hex encoded OpenPGP v4 fingerprint of the key.
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* @return PEP node name.
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*/
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public static String PEP_NODE_PUBLIC_KEY(OpenPgpV4Fingerprint id) {
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return PEP_NODE_PUBLIC_KEYS + ":" + id;
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}
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public static void changeAccessModelIfNecessary(LeafNode node, AccessModel accessModel)
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throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException {
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ConfigureForm current = node.getNodeConfiguration();
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if (current.getAccessModel() != accessModel) {
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ConfigureForm updateConfig = new ConfigureForm(DataForm.Type.submit);
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updateConfig.setAccessModel(accessModel);
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node.sendConfigurationForm(updateConfig);
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}
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}
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/**
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* Publish the users OpenPGP public key to the public key node if necessary.
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* Also announce the key to other users by updating the metadata node.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#annoucning-pubkey">XEP-0373 §4.1</a>
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*
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* @throws InterruptedException
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* @throws PubSubException.NotALeafNodeException
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* @throws XMPPException.XMPPErrorException
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* @throws SmackException.NotConnectedException
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* @throws SmackException.NoResponseException
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*/
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public static void publishPublicKey(XMPPConnection connection, PubkeyElement pubkeyElement, OpenPgpV4Fingerprint fingerprint)
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throws InterruptedException, PubSubException.NotALeafNodeException,
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XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException {
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String keyNodeName = PEP_NODE_PUBLIC_KEY(fingerprint);
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PubSubManager pm = PubSubManager.getInstance(connection, connection.getUser().asBareJid());
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// Check if key available at data node
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// If not, publish key to data node
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LeafNode keyNode = pm.getOrCreateLeafNode(keyNodeName);
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List<Item> items = keyNode.getItems(1);
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if (items.isEmpty()) {
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LOGGER.log(Level.FINE, "Node " + keyNodeName + " is empty. Publish.");
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keyNode.publish(new PayloadItem<>(pubkeyElement));
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} else {
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LOGGER.log(Level.FINE, "Node " + keyNodeName + " already contains key. Skip.");
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}
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// Fetch IDs from metadata node
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LeafNode metadataNode = pm.getOrCreateLeafNode(PEP_NODE_PUBLIC_KEYS);
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List<PayloadItem<PublicKeysListElement>> metadataItems = metadataNode.getItems(1);
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PublicKeysListElement.Builder builder = PublicKeysListElement.builder();
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if (!metadataItems.isEmpty() && metadataItems.get(0).getPayload() != null) {
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// Add old entries back to list.
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PublicKeysListElement publishedList = metadataItems.get(0).getPayload();
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for (PublicKeysListElement.PubkeyMetadataElement meta : publishedList.getMetadata().values()) {
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builder.addMetadata(meta);
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}
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}
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builder.addMetadata(new PublicKeysListElement.PubkeyMetadataElement(fingerprint, new Date()));
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// Publish IDs to metadata node
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metadataNode.publish(new PayloadItem<>(builder.build()));
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}
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/**
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* Consult the public key metadata node and fetch a list of all of our published OpenPGP public keys.
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* TODO: Add @see which points to the (for now missing) respective example in XEP-0373.
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*
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* @return content of our metadata node.
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* @throws InterruptedException
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* @throws PubSubException.NotALeafNodeException
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* @throws SmackException.NoResponseException
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* @throws SmackException.NotConnectedException
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* @throws XMPPException.XMPPErrorException
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* @throws PubSubException.NotAPubSubNodeException
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*/
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public static PublicKeysListElement fetchPubkeysList(XMPPConnection connection)
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throws InterruptedException, PubSubException.NotALeafNodeException, SmackException.NoResponseException,
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SmackException.NotConnectedException, XMPPException.XMPPErrorException,
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PubSubException.NotAPubSubNodeException {
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return fetchPubkeysList(connection, connection.getUser().asBareJid());
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}
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/**
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* Consult the public key metadata node of {@code contact} to fetch the list of their published OpenPGP public keys.
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* TODO: Add @see which points to the (for now missing) respective example in XEP-0373.
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*
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* @param contact {@link BareJid} of the user we want to fetch the list from.
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* @return content of {@code contact}'s metadata node.
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* @throws InterruptedException
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* @throws PubSubException.NotALeafNodeException
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* @throws SmackException.NoResponseException
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* @throws SmackException.NotConnectedException
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* @throws XMPPException.XMPPErrorException
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* @throws PubSubException.NotAPubSubNodeException
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*/
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public static PublicKeysListElement fetchPubkeysList(XMPPConnection connection, BareJid contact)
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throws InterruptedException, PubSubException.NotALeafNodeException, SmackException.NoResponseException,
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SmackException.NotConnectedException, XMPPException.XMPPErrorException,
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PubSubException.NotAPubSubNodeException {
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PubSubManager pm = PubSubManager.getInstance(connection, contact);
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LeafNode node = pm.getLeafNode(PEP_NODE_PUBLIC_KEYS);
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List<PayloadItem<PublicKeysListElement>> list = node.getItems(1);
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if (list.isEmpty()) {
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return null;
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}
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return list.get(0).getPayload();
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}
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/**
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* Delete our metadata node.
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*
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* @throws XMPPException.XMPPErrorException
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* @throws SmackException.NotConnectedException
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* @throws InterruptedException
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* @throws SmackException.NoResponseException
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*/
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public static void deletePubkeysListNode(XMPPConnection connection)
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throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException {
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PubSubManager pm = PubSubManager.getInstance(connection, connection.getUser().asBareJid());
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pm.deleteNode(PEP_NODE_PUBLIC_KEYS);
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}
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/**
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* Fetch the OpenPGP public key of a {@code contact}, identified by its OpenPGP {@code v4_fingerprint}.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#discover-pubkey">XEP-0373 §4.3</a>
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*
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* @param contact {@link BareJid} of the contact we want to fetch a key from.
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* @param v4_fingerprint upper case, hex encoded v4 fingerprint of the contacts key.
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* @return {@link PubkeyElement} containing the requested public key.
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* @throws InterruptedException
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* @throws PubSubException.NotALeafNodeException
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* @throws SmackException.NoResponseException
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* @throws SmackException.NotConnectedException
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* @throws XMPPException.XMPPErrorException
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* @throws PubSubException.NotAPubSubNodeException
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*/
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public static PubkeyElement fetchPubkey(XMPPConnection connection, BareJid contact, OpenPgpV4Fingerprint v4_fingerprint)
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throws InterruptedException, PubSubException.NotALeafNodeException, SmackException.NoResponseException,
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SmackException.NotConnectedException, XMPPException.XMPPErrorException,
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PubSubException.NotAPubSubNodeException {
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PubSubManager pm = PubSubManager.getInstance(connection, contact);
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LeafNode node = pm.getLeafNode(PEP_NODE_PUBLIC_KEY(v4_fingerprint));
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List<PayloadItem<PubkeyElement>> list = node.getItems(1);
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if (list.isEmpty()) {
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return null;
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}
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return list.get(0).getPayload();
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}
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/**
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* TODO: Implement and document.
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*/
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public static void depositSecretKey(XMPPConnection connection, SecretkeyElement element)
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throws InterruptedException, PubSubException.NotALeafNodeException,
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XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException {
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PubSubManager pm = PubSubManager.getInstance(connection);
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LeafNode secretKeyNode = pm.getOrCreateLeafNode(PEP_NODE_SECRET_KEY);
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PubSubDelegate.changeAccessModelIfNecessary(secretKeyNode, AccessModel.whitelist);
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secretKeyNode.publish(new PayloadItem<>(element));
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}
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public static SecretkeyElement fetchSecretKey(XMPPConnection connection)
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throws InterruptedException, PubSubException.NotALeafNodeException, XMPPException.XMPPErrorException,
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SmackException.NotConnectedException, SmackException.NoResponseException {
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PubSubManager pm = PubSubManager.getInstance(connection);
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LeafNode secretKeyNode = pm.getOrCreateLeafNode(PEP_NODE_SECRET_KEY);
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List<PayloadItem<SecretkeyElement>> list = secretKeyNode.getItems(1);
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if (list.size() == 0) {
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LOGGER.log(Level.INFO, "No secret key published!");
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return null;
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}
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SecretkeyElement secretkeyElement = list.get(0).getPayload();
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return secretkeyElement;
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}
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public static void deleteSecretKeyNode(XMPPConnection connection)
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throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException {
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PubSubManager pm = PubSubManager.getInstance(connection);
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pm.deleteNode(PEP_NODE_SECRET_KEY);
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}
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}
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