354 lines
13 KiB
Java
354 lines
13 KiB
Java
package eu.siacs.conversations.parser;
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import android.support.annotation.NonNull;
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import android.util.Base64;
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import android.util.Log;
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import android.util.Pair;
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import org.whispersystems.libaxolotl.IdentityKey;
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import org.whispersystems.libaxolotl.ecc.Curve;
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import org.whispersystems.libaxolotl.ecc.ECPublicKey;
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import org.whispersystems.libaxolotl.state.PreKeyBundle;
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import java.io.ByteArrayInputStream;
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import java.security.cert.CertificateException;
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import java.security.cert.CertificateFactory;
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import java.security.cert.X509Certificate;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.crypto.axolotl.AxolotlService;
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import eu.siacs.conversations.entities.Account;
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import eu.siacs.conversations.entities.Contact;
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import eu.siacs.conversations.services.XmppConnectionService;
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import eu.siacs.conversations.utils.Xmlns;
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import eu.siacs.conversations.xml.Element;
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import eu.siacs.conversations.xmpp.OnIqPacketReceived;
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import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
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import eu.siacs.conversations.xmpp.jid.Jid;
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import eu.siacs.conversations.xmpp.stanzas.IqPacket;
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public class IqParser extends AbstractParser implements OnIqPacketReceived {
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public IqParser(final XmppConnectionService service) {
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super(service);
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}
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private void rosterItems(final Account account, final Element query) {
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final String version = query.getAttribute("ver");
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if (version != null) {
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account.getRoster().setVersion(version);
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}
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for (final Element item : query.getChildren()) {
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if (item.getName().equals("item")) {
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final Jid jid = item.getAttributeAsJid("jid");
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if (jid == null) {
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continue;
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}
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final String name = item.getAttribute("name");
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final String subscription = item.getAttribute("subscription");
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final Contact contact = account.getRoster().getContact(jid);
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if (!contact.getOption(Contact.Options.DIRTY_PUSH)) {
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contact.setServerName(name);
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contact.parseGroupsFromElement(item);
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}
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if (subscription != null) {
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if (subscription.equals("remove")) {
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contact.resetOption(Contact.Options.IN_ROSTER);
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contact.resetOption(Contact.Options.DIRTY_DELETE);
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contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
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} else {
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contact.setOption(Contact.Options.IN_ROSTER);
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contact.resetOption(Contact.Options.DIRTY_PUSH);
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contact.parseSubscriptionFromElement(item);
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}
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}
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mXmppConnectionService.getAvatarService().clear(contact);
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}
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}
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mXmppConnectionService.updateConversationUi();
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mXmppConnectionService.updateRosterUi();
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}
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public String avatarData(final IqPacket packet) {
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final Element pubsub = packet.findChild("pubsub",
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"http://jabber.org/protocol/pubsub");
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if (pubsub == null) {
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return null;
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}
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final Element items = pubsub.findChild("items");
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if (items == null) {
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return null;
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}
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return super.avatarData(items);
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}
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public Element getItem(final IqPacket packet) {
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final Element pubsub = packet.findChild("pubsub",
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"http://jabber.org/protocol/pubsub");
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if (pubsub == null) {
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return null;
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}
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final Element items = pubsub.findChild("items");
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if (items == null) {
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return null;
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}
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return items.findChild("item");
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}
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@NonNull
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public Set<Integer> deviceIds(final Element item) {
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Set<Integer> deviceIds = new HashSet<>();
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if (item != null) {
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final Element list = item.findChild("list");
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if (list != null) {
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for (Element device : list.getChildren()) {
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if (!device.getName().equals("device")) {
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continue;
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}
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try {
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Integer id = Integer.valueOf(device.getAttribute("id"));
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deviceIds.add(id);
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} catch (NumberFormatException e) {
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Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered invalid <device> node in PEP ("+e.getMessage()+"):" + device.toString()+ ", skipping...");
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continue;
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}
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}
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}
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}
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return deviceIds;
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}
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public Integer signedPreKeyId(final Element bundle) {
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final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic");
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if(signedPreKeyPublic == null) {
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return null;
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}
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return Integer.valueOf(signedPreKeyPublic.getAttribute("signedPreKeyId"));
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}
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public ECPublicKey signedPreKeyPublic(final Element bundle) {
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ECPublicKey publicKey = null;
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final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic");
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if(signedPreKeyPublic == null) {
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return null;
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}
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try {
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publicKey = Curve.decodePoint(Base64.decode(signedPreKeyPublic.getContent(),Base64.DEFAULT), 0);
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} catch (Throwable e) {
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Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid signedPreKeyPublic in PEP: " + e.getMessage());
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}
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return publicKey;
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}
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public byte[] signedPreKeySignature(final Element bundle) {
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final Element signedPreKeySignature = bundle.findChild("signedPreKeySignature");
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if(signedPreKeySignature == null) {
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return null;
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}
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try {
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return Base64.decode(signedPreKeySignature.getContent(), Base64.DEFAULT);
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} catch (Throwable e) {
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Log.e(Config.LOGTAG,AxolotlService.LOGPREFIX+" : Invalid base64 in signedPreKeySignature");
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return null;
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}
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}
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public IdentityKey identityKey(final Element bundle) {
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IdentityKey identityKey = null;
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final Element identityKeyElement = bundle.findChild("identityKey");
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if(identityKeyElement == null) {
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return null;
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}
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try {
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identityKey = new IdentityKey(Base64.decode(identityKeyElement.getContent(), Base64.DEFAULT), 0);
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} catch (Throwable e) {
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Log.e(Config.LOGTAG,AxolotlService.LOGPREFIX+" : "+"Invalid identityKey in PEP: "+e.getMessage());
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}
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return identityKey;
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}
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public Map<Integer, ECPublicKey> preKeyPublics(final IqPacket packet) {
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Map<Integer, ECPublicKey> preKeyRecords = new HashMap<>();
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Element item = getItem(packet);
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if (item == null) {
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Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <item> in bundle IQ packet: " + packet);
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return null;
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}
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final Element bundleElement = item.findChild("bundle");
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if(bundleElement == null) {
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return null;
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}
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final Element prekeysElement = bundleElement.findChild("prekeys");
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if(prekeysElement == null) {
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Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <prekeys> in bundle IQ packet: " + packet);
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return null;
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}
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for(Element preKeyPublicElement : prekeysElement.getChildren()) {
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if(!preKeyPublicElement.getName().equals("preKeyPublic")){
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Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered unexpected tag in prekeys list: " + preKeyPublicElement);
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continue;
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}
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Integer preKeyId = Integer.valueOf(preKeyPublicElement.getAttribute("preKeyId"));
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try {
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ECPublicKey preKeyPublic = Curve.decodePoint(Base64.decode(preKeyPublicElement.getContent(), Base64.DEFAULT), 0);
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preKeyRecords.put(preKeyId, preKeyPublic);
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} catch (Throwable e) {
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Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid preKeyPublic (ID="+preKeyId+") in PEP: "+ e.getMessage()+", skipping...");
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continue;
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}
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}
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return preKeyRecords;
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}
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public Pair<X509Certificate[],byte[]> verification(final IqPacket packet) {
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Element item = getItem(packet);
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Element verification = item != null ? item.findChild("verification",AxolotlService.PEP_PREFIX) : null;
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Element chain = verification != null ? verification.findChild("chain") : null;
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Element signature = verification != null ? verification.findChild("signature") : null;
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if (chain != null && signature != null) {
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List<Element> certElements = chain.getChildren();
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X509Certificate[] certificates = new X509Certificate[certElements.size()];
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try {
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CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
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int i = 0;
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for(Element cert : certElements) {
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certificates[i] = (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(Base64.decode(cert.getContent(),Base64.DEFAULT)));
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++i;
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}
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return new Pair<>(certificates,Base64.decode(signature.getContent(),Base64.DEFAULT));
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} catch (CertificateException e) {
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return null;
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}
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} else {
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return null;
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}
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}
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public PreKeyBundle bundle(final IqPacket bundle) {
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Element bundleItem = getItem(bundle);
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if(bundleItem == null) {
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return null;
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}
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final Element bundleElement = bundleItem.findChild("bundle");
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if(bundleElement == null) {
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return null;
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}
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ECPublicKey signedPreKeyPublic = signedPreKeyPublic(bundleElement);
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Integer signedPreKeyId = signedPreKeyId(bundleElement);
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byte[] signedPreKeySignature = signedPreKeySignature(bundleElement);
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IdentityKey identityKey = identityKey(bundleElement);
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if(signedPreKeyPublic == null || identityKey == null) {
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return null;
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}
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return new PreKeyBundle(0, 0, 0, null,
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signedPreKeyId, signedPreKeyPublic, signedPreKeySignature, identityKey);
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}
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public List<PreKeyBundle> preKeys(final IqPacket preKeys) {
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List<PreKeyBundle> bundles = new ArrayList<>();
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Map<Integer, ECPublicKey> preKeyPublics = preKeyPublics(preKeys);
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if ( preKeyPublics != null) {
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for (Integer preKeyId : preKeyPublics.keySet()) {
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ECPublicKey preKeyPublic = preKeyPublics.get(preKeyId);
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bundles.add(new PreKeyBundle(0, 0, preKeyId, preKeyPublic,
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0, null, null, null));
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}
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}
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return bundles;
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}
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@Override
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public void onIqPacketReceived(final Account account, final IqPacket packet) {
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if (packet.getType() == IqPacket.TYPE.ERROR || packet.getType() == IqPacket.TYPE.TIMEOUT) {
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return;
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} else if (packet.hasChild("query", Xmlns.ROSTER) && packet.fromServer(account)) {
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final Element query = packet.findChild("query");
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// If this is in response to a query for the whole roster:
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if (packet.getType() == IqPacket.TYPE.RESULT) {
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account.getRoster().markAllAsNotInRoster();
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}
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this.rosterItems(account, query);
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} else if ((packet.hasChild("block", Xmlns.BLOCKING) || packet.hasChild("blocklist", Xmlns.BLOCKING)) &&
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packet.fromServer(account)) {
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// Block list or block push.
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Log.d(Config.LOGTAG, "Received blocklist update from server");
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final Element blocklist = packet.findChild("blocklist", Xmlns.BLOCKING);
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final Element block = packet.findChild("block", Xmlns.BLOCKING);
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final Collection<Element> items = blocklist != null ? blocklist.getChildren() :
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(block != null ? block.getChildren() : null);
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// If this is a response to a blocklist query, clear the block list and replace with the new one.
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// Otherwise, just update the existing blocklist.
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if (packet.getType() == IqPacket.TYPE.RESULT) {
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account.clearBlocklist();
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account.getXmppConnection().getFeatures().setBlockListRequested(true);
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}
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if (items != null) {
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final Collection<Jid> jids = new ArrayList<>(items.size());
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// Create a collection of Jids from the packet
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for (final Element item : items) {
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if (item.getName().equals("item")) {
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final Jid jid = item.getAttributeAsJid("jid");
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if (jid != null) {
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jids.add(jid);
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}
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}
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}
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account.getBlocklist().addAll(jids);
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}
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// Update the UI
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mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
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} else if (packet.hasChild("unblock", Xmlns.BLOCKING) &&
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packet.fromServer(account) && packet.getType() == IqPacket.TYPE.SET) {
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Log.d(Config.LOGTAG, "Received unblock update from server");
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final Collection<Element> items = packet.findChild("unblock", Xmlns.BLOCKING).getChildren();
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if (items.size() == 0) {
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// No children to unblock == unblock all
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account.getBlocklist().clear();
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} else {
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final Collection<Jid> jids = new ArrayList<>(items.size());
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for (final Element item : items) {
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if (item.getName().equals("item")) {
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final Jid jid = item.getAttributeAsJid("jid");
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if (jid != null) {
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jids.add(jid);
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}
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}
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}
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account.getBlocklist().removeAll(jids);
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}
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mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
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} else if (packet.hasChild("open", "http://jabber.org/protocol/ibb")
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|| packet.hasChild("data", "http://jabber.org/protocol/ibb")) {
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mXmppConnectionService.getJingleConnectionManager()
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.deliverIbbPacket(account, packet);
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} else if (packet.hasChild("query", "http://jabber.org/protocol/disco#info")) {
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final IqPacket response = mXmppConnectionService.getIqGenerator().discoResponse(packet);
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mXmppConnectionService.sendIqPacket(account, response, null);
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} else if (packet.hasChild("query","jabber:iq:version")) {
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final IqPacket response = mXmppConnectionService.getIqGenerator().versionResponse(packet);
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mXmppConnectionService.sendIqPacket(account,response,null);
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} else if (packet.hasChild("ping", "urn:xmpp:ping")) {
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final IqPacket response = packet.generateResponse(IqPacket.TYPE.RESULT);
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mXmppConnectionService.sendIqPacket(account, response, null);
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} else {
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if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
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final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
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final Element error = response.addChild("error");
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error.setAttribute("type", "cancel");
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error.addChild("feature-not-implemented","urn:ietf:params:xml:ns:xmpp-stanzas");
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account.getXmppConnection().sendIqPacket(response, null);
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}
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}
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}
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}
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