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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 de.thedevstack.conversationsplus.ConversationsPlusApplication;
import de.tzur.conversations.Settings;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
public abstract class AbstractGenerator {
private final String[] FEATURES = {
"urn:xmpp:jingle:1",
"urn:xmpp:jingle:apps:file-transfer:3",
"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",
AxolotlService.PEP_DEVICE_LIST+"+notify"};
private final String[] MESSAGE_CONFIRMATION_FEATURES = {
"urn:xmpp:chat-markers:0",
"urn:xmpp:receipts"
};
protected final String IDENTITY_TYPE = "phone";
private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
public String getCapHash() {
StringBuilder s = new StringBuilder();
s.append("client/" + IDENTITY_TYPE + "//" + ConversationsPlusApplication.getNameAndVersion() + "<");
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));
}
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 (Settings.CONFIRM_MESSAGE_RECEIVED) {
features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
}
Collections.sort(features);
return features;
}
}
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