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package eu.siacs.conversations.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 eu.siacs.conversations.Config;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.PhoneHelper;
import eu.siacs.conversations.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 String mVersion = null;
protected final String IDENTITY_NAME = "Conversations";
protected final String IDENTITY_TYPE = "phone";
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 IDENTITY_NAME + " " + getIdentityVersion();
}
public String getCapHash() {
StringBuilder s = new StringBuilder();
s.append("client/" + IDENTITY_TYPE + "//" + 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<String> getFeatures() {
ArrayList<String> 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));
}
Collections.sort(features);
return features;
}
}
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