package de.pixart.messenger.generator; import android.util.Base64; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Locale; import java.util.TimeZone; import de.pixart.messenger.Config; import de.pixart.messenger.R; import de.pixart.messenger.crypto.axolotl.AxolotlService; import de.pixart.messenger.services.XmppConnectionService; import de.pixart.messenger.utils.PhoneHelper; import de.pixart.messenger.xmpp.jingle.stanzas.Content; public abstract class AbstractGenerator { private final String[] FEATURES = { "urn:xmpp:jingle:1", Content.Version.FT_3.getNamespace(), Content.Version.FT_4.getNamespace(), "urn:xmpp:jingle:transports:s5b:1", "urn:xmpp:jingle:transports:ibb:1", "http://jabber.org/protocol/muc", "jabber:x:conference", "http://jabber.org/protocol/caps", "http://jabber.org/protocol/disco#info", "urn:xmpp:avatar:metadata+notify", "http://jabber.org/protocol/nick+notify", "urn:xmpp:ping", "jabber:iq:version", "http://jabber.org/protocol/chatstates" }; private final String[] MESSAGE_CONFIRMATION_FEATURES = { "urn:xmpp:chat-markers:0", "urn:xmpp:receipts" }; private final String[] MESSAGE_CORRECTION_FEATURES = { "urn:xmpp:message-correct:0" }; private final String[] PRIVACY_SENSITIVE = { "urn:xmpp:time" //XEP-0202: Entity Time leaks time zone }; private final String[] OTR = { "urn:xmpp:otr:0" }; private String mVersion = null; private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US); protected XmppConnectionService mXmppConnectionService; protected AbstractGenerator(XmppConnectionService service) { this.mXmppConnectionService = service; } protected String getIdentityVersion() { if (mVersion == null) { this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService); } return this.mVersion; } public String getIdentityName() { return mXmppConnectionService.getString(R.string.app_name) + " " + getIdentityVersion(); } public String getIdentityType() { if ("chromium".equals(android.os.Build.BRAND)) { return "pc"; } else { return mXmppConnectionService.getString(R.string.default_resource).toLowerCase(); } } public String getCapHash() { StringBuilder s = new StringBuilder(); s.append("client/" + getIdentityType() + "//" + getIdentityName() + "<"); MessageDigest md; try { md = MessageDigest.getInstance("SHA-1"); } catch (NoSuchAlgorithmException e) { return null; } for (String feature : getFeatures()) { s.append(feature + "<"); } byte[] sha1 = md.digest(s.toString().getBytes()); return new String(Base64.encode(sha1, Base64.DEFAULT)).trim(); } public static String getTimestamp(long time) { DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC")); return DATE_FORMAT.format(time); } public List getFeatures() { ArrayList features = new ArrayList<>(); features.addAll(Arrays.asList(FEATURES)); if (mXmppConnectionService.confirmMessages()) { features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES)); } if (mXmppConnectionService.allowMessageCorrection()) { features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES)); } if (Config.supportOmemo()) { features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY); } if (!mXmppConnectionService.useTorToConnect()) { features.addAll(Arrays.asList(PRIVACY_SENSITIVE)); } if (Config.supportOtr()) { features.addAll(Arrays.asList(OTR)); } Collections.sort(features); return features; } }