Beispiel #1
0
  public static List<PreKeyRecord> generatePreKeys(Context context, MasterSecret masterSecret) {
    PreKeyStore preKeyStore = new TextSecurePreKeyStore(context, masterSecret);
    List<PreKeyRecord> records = new LinkedList<>();
    int preKeyIdOffset = getNextPreKeyId(context);

    for (int i = 0; i < BATCH_SIZE; i++) {
      int preKeyId = (preKeyIdOffset + i) % Medium.MAX_VALUE;
      ECKeyPair keyPair = Curve.generateKeyPair();
      PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);

      preKeyStore.storePreKey(preKeyId, record);
      records.add(record);
    }

    setNextPreKeyId(context, (preKeyIdOffset + BATCH_SIZE + 1) % Medium.MAX_VALUE);
    return records;
  }
Beispiel #2
0
  public static PreKeyRecord generateLastResortKey(Context context, MasterSecret masterSecret) {
    PreKeyStore preKeyStore = new TextSecurePreKeyStore(context, masterSecret);

    if (preKeyStore.containsPreKey(Medium.MAX_VALUE)) {
      try {
        return preKeyStore.loadPreKey(Medium.MAX_VALUE);
      } catch (InvalidKeyIdException e) {
        Log.w("PreKeyUtil", e);
        preKeyStore.removePreKey(Medium.MAX_VALUE);
      }
    }

    ECKeyPair keyPair = Curve.generateKeyPair();
    PreKeyRecord record = new PreKeyRecord(Medium.MAX_VALUE, keyPair);

    preKeyStore.storePreKey(Medium.MAX_VALUE, record);

    return record;
  }