diff options
Diffstat (limited to 'src/main/java/eu/siacs/conversations/parser/IqParser.java')
| -rw-r--r-- | src/main/java/eu/siacs/conversations/parser/IqParser.java | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/parser/IqParser.java b/src/main/java/eu/siacs/conversations/parser/IqParser.java new file mode 100644 index 00000000..c03ed42f --- /dev/null +++ b/src/main/java/eu/siacs/conversations/parser/IqParser.java @@ -0,0 +1,355 @@ +package eu.siacs.conversations.parser; + +import android.support.annotation.NonNull; +import android.util.Base64; +import android.util.Log; +import android.util.Pair; + +import org.whispersystems.libaxolotl.IdentityKey; +import org.whispersystems.libaxolotl.ecc.Curve; +import org.whispersystems.libaxolotl.ecc.ECPublicKey; +import org.whispersystems.libaxolotl.state.PreKeyBundle; + +import java.io.ByteArrayInputStream; +import java.security.cert.CertificateException; +import java.security.cert.CertificateFactory; +import java.security.cert.X509Certificate; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import de.thedevstack.android.logcat.Logging; +import eu.siacs.conversations.Config; +import eu.siacs.conversations.crypto.axolotl.AxolotlService; +import eu.siacs.conversations.entities.Account; +import eu.siacs.conversations.entities.Contact; +import eu.siacs.conversations.services.AvatarService; +import eu.siacs.conversations.services.XmppConnectionService; +import eu.siacs.conversations.utils.Xmlns; +import eu.siacs.conversations.xml.Element; +import eu.siacs.conversations.xmpp.OnIqPacketReceived; +import eu.siacs.conversations.xmpp.OnUpdateBlocklist; +import eu.siacs.conversations.xmpp.jid.Jid; +import eu.siacs.conversations.xmpp.stanzas.IqPacket; + +public class IqParser extends AbstractParser implements OnIqPacketReceived { + + public IqParser(final XmppConnectionService service) { + super(service); + } + + private void rosterItems(final Account account, final Element query) { + final String version = query.getAttribute("ver"); + if (version != null) { + account.getRoster().setVersion(version); + } + for (final Element item : query.getChildren()) { + if (item.getName().equals("item")) { + final Jid jid = item.getAttributeAsJid("jid"); + if (jid == null) { + continue; + } + final String name = item.getAttribute("name"); + final String subscription = item.getAttribute("subscription"); + final Contact contact = account.getRoster().getContact(jid); + if (!contact.getOption(Contact.Options.DIRTY_PUSH)) { + contact.setServerName(name); + contact.parseGroupsFromElement(item); + } + if (subscription != null) { + if (subscription.equals("remove")) { + contact.resetOption(Contact.Options.IN_ROSTER); + contact.resetOption(Contact.Options.DIRTY_DELETE); + contact.resetOption(Contact.Options.PREEMPTIVE_GRANT); + } else { + contact.setOption(Contact.Options.IN_ROSTER); + contact.resetOption(Contact.Options.DIRTY_PUSH); + contact.parseSubscriptionFromElement(item); + } + } + AvatarService.getInstance().clear(contact); + } + } + mXmppConnectionService.updateConversationUi(); + mXmppConnectionService.updateRosterUi(); + } + + public String avatarData(final IqPacket packet) { + final Element pubsub = packet.findChild("pubsub", + "http://jabber.org/protocol/pubsub"); + if (pubsub == null) { + return null; + } + final Element items = pubsub.findChild("items"); + if (items == null) { + return null; + } + return super.avatarData(items); + } + + public Element getItem(final IqPacket packet) { + final Element pubsub = packet.findChild("pubsub", + "http://jabber.org/protocol/pubsub"); + if (pubsub == null) { + return null; + } + final Element items = pubsub.findChild("items"); + if (items == null) { + return null; + } + return items.findChild("item"); + } + + @NonNull + public Set<Integer> deviceIds(final Element item) { + Set<Integer> deviceIds = new HashSet<>(); + if (item != null) { + final Element list = item.findChild("list"); + if (list != null) { + for (Element device : list.getChildren()) { + if (!device.getName().equals("device")) { + continue; + } + try { + Integer id = Integer.valueOf(device.getAttribute("id")); + deviceIds.add(id); + } catch (NumberFormatException e) { + Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered invalid <device> node in PEP ("+e.getMessage()+"):" + device.toString()+ ", skipping..."); + continue; + } + } + } + } + return deviceIds; + } + + public Integer signedPreKeyId(final Element bundle) { + final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic"); + if(signedPreKeyPublic == null) { + return null; + } + return Integer.valueOf(signedPreKeyPublic.getAttribute("signedPreKeyId")); + } + + public ECPublicKey signedPreKeyPublic(final Element bundle) { + ECPublicKey publicKey = null; + final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic"); + if(signedPreKeyPublic == null) { + return null; + } + try { + publicKey = Curve.decodePoint(Base64.decode(signedPreKeyPublic.getContent(),Base64.DEFAULT), 0); + } catch (Throwable e) { + Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid signedPreKeyPublic in PEP: " + e.getMessage()); + } + return publicKey; + } + + public byte[] signedPreKeySignature(final Element bundle) { + final Element signedPreKeySignature = bundle.findChild("signedPreKeySignature"); + if(signedPreKeySignature == null) { + return null; + } + try { + return Base64.decode(signedPreKeySignature.getContent(), Base64.DEFAULT); + } catch (Throwable e) { + Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : Invalid base64 in signedPreKeySignature"); + return null; + } + } + + public IdentityKey identityKey(final Element bundle) { + IdentityKey identityKey = null; + final Element identityKeyElement = bundle.findChild("identityKey"); + if(identityKeyElement == null) { + return null; + } + try { + identityKey = new IdentityKey(Base64.decode(identityKeyElement.getContent(), Base64.DEFAULT), 0); + } catch (Throwable e) { + Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid identityKey in PEP: "+e.getMessage()); + } + return identityKey; + } + + public Map<Integer, ECPublicKey> preKeyPublics(final IqPacket packet) { + Map<Integer, ECPublicKey> preKeyRecords = new HashMap<>(); + Element item = getItem(packet); + if (item == null) { + Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <item> in bundle IQ packet: " + packet); + return null; + } + final Element bundleElement = item.findChild("bundle"); + if(bundleElement == null) { + return null; + } + final Element prekeysElement = bundleElement.findChild("prekeys"); + if(prekeysElement == null) { + Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <prekeys> in bundle IQ packet: " + packet); + return null; + } + for(Element preKeyPublicElement : prekeysElement.getChildren()) { + if(!preKeyPublicElement.getName().equals("preKeyPublic")){ + Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered unexpected tag in prekeys list: " + preKeyPublicElement); + continue; + } + Integer preKeyId = Integer.valueOf(preKeyPublicElement.getAttribute("preKeyId")); + try { + ECPublicKey preKeyPublic = Curve.decodePoint(Base64.decode(preKeyPublicElement.getContent(), Base64.DEFAULT), 0); + preKeyRecords.put(preKeyId, preKeyPublic); + } catch (Throwable e) { + Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid preKeyPublic (ID="+preKeyId+") in PEP: "+ e.getMessage()+", skipping..."); + continue; + } + } + return preKeyRecords; + } + + public Pair<X509Certificate[],byte[]> verification(final IqPacket packet) { + Element item = getItem(packet); + Element verification = item != null ? item.findChild("verification", AxolotlService.PEP_PREFIX) : null; + Element chain = verification != null ? verification.findChild("chain") : null; + Element signature = verification != null ? verification.findChild("signature") : null; + if (chain != null && signature != null) { + List<Element> certElements = chain.getChildren(); + X509Certificate[] certificates = new X509Certificate[certElements.size()]; + try { + CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); + int i = 0; + for(Element cert : certElements) { + certificates[i] = (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(Base64.decode(cert.getContent(),Base64.DEFAULT))); + ++i; + } + return new Pair<>(certificates,Base64.decode(signature.getContent(),Base64.DEFAULT)); + } catch (CertificateException e) { + return null; + } + } else { + return null; + } + } + + public PreKeyBundle bundle(final IqPacket bundle) { + Element bundleItem = getItem(bundle); + if(bundleItem == null) { + return null; + } + final Element bundleElement = bundleItem.findChild("bundle"); + if(bundleElement == null) { + return null; + } + ECPublicKey signedPreKeyPublic = signedPreKeyPublic(bundleElement); + Integer signedPreKeyId = signedPreKeyId(bundleElement); + byte[] signedPreKeySignature = signedPreKeySignature(bundleElement); + IdentityKey identityKey = identityKey(bundleElement); + if(signedPreKeyPublic == null || identityKey == null) { + return null; + } + + return new PreKeyBundle(0, 0, 0, null, + signedPreKeyId, signedPreKeyPublic, signedPreKeySignature, identityKey); + } + + public List<PreKeyBundle> preKeys(final IqPacket preKeys) { + List<PreKeyBundle> bundles = new ArrayList<>(); + Map<Integer, ECPublicKey> preKeyPublics = preKeyPublics(preKeys); + if ( preKeyPublics != null) { + for (Integer preKeyId : preKeyPublics.keySet()) { + ECPublicKey preKeyPublic = preKeyPublics.get(preKeyId); + bundles.add(new PreKeyBundle(0, 0, preKeyId, preKeyPublic, + 0, null, null, null)); + } + } + + return bundles; + } + + @Override + public void onIqPacketReceived(final Account account, final IqPacket packet) { + if (packet.getType() == IqPacket.TYPE.ERROR || packet.getType() == IqPacket.TYPE.TIMEOUT) { + return; + } else if (packet.hasChild("query", Xmlns.ROSTER) && packet.fromServer(account)) { + final Element query = packet.findChild("query"); + // If this is in response to a query for the whole roster: + if (packet.getType() == IqPacket.TYPE.RESULT) { + account.getRoster().markAllAsNotInRoster(); + } + this.rosterItems(account, query); + } else if ((packet.hasChild("block", Xmlns.BLOCKING) || packet.hasChild("blocklist", Xmlns.BLOCKING)) && + packet.fromServer(account)) { + // Block list or block push. + Logging.d(Config.LOGTAG, "Received blocklist update from server"); + final Element blocklist = packet.findChild("blocklist", Xmlns.BLOCKING); + final Element block = packet.findChild("block", Xmlns.BLOCKING); + final Collection<Element> items = blocklist != null ? blocklist.getChildren() : + (block != null ? block.getChildren() : null); + // If this is a response to a blocklist query, clear the block list and replace with the new one. + // Otherwise, just update the existing blocklist. + if (packet.getType() == IqPacket.TYPE.RESULT) { + account.clearBlocklist(); + account.getXmppConnection().getFeatures().setBlockListRequested(true); + } + if (items != null) { + final Collection<Jid> jids = new ArrayList<>(items.size()); + // Create a collection of Jids from the packet + for (final Element item : items) { + if (item.getName().equals("item")) { + final Jid jid = item.getAttributeAsJid("jid"); + if (jid != null) { + jids.add(jid); + } + } + } + account.getBlocklist().addAll(jids); + } + // Update the UI + mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED); + } else if (packet.hasChild("unblock", Xmlns.BLOCKING) && + packet.fromServer(account) && packet.getType() == IqPacket.TYPE.SET) { + Logging.d(Config.LOGTAG, "Received unblock update from server"); + final Collection<Element> items = packet.findChild("unblock", Xmlns.BLOCKING).getChildren(); + if (items.size() == 0) { + // No children to unblock == unblock all + account.getBlocklist().clear(); + } else { + final Collection<Jid> jids = new ArrayList<>(items.size()); + for (final Element item : items) { + if (item.getName().equals("item")) { + final Jid jid = item.getAttributeAsJid("jid"); + if (jid != null) { + jids.add(jid); + } + } + } + account.getBlocklist().removeAll(jids); + } + mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED); + } else if (packet.hasChild("open", "http://jabber.org/protocol/ibb") + || packet.hasChild("data", "http://jabber.org/protocol/ibb")) { + mXmppConnectionService.getJingleConnectionManager() + .deliverIbbPacket(account, packet); + } else if (packet.hasChild("query", "http://jabber.org/protocol/disco#info")) { + final IqPacket response = mXmppConnectionService.getIqGenerator().discoResponse(packet); + mXmppConnectionService.sendIqPacket(account, response, null); + } else if (packet.hasChild("query","jabber:iq:version")) { + final IqPacket response = mXmppConnectionService.getIqGenerator().versionResponse(packet); + mXmppConnectionService.sendIqPacket(account,response,null); + } else if (packet.hasChild("ping", "urn:xmpp:ping")) { + final IqPacket response = packet.generateResponse(IqPacket.TYPE.RESULT); + mXmppConnectionService.sendIqPacket(account, response, null); + } else { + if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) { + final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR); + final Element error = response.addChild("error"); + error.setAttribute("type", "cancel"); + error.addChild("feature-not-implemented","urn:ietf:params:xml:ns:xmpp-stanzas"); + account.getXmppConnection().sendIqPacket(response, null); + } + } + } + +} |