@Override
public boolean addUsername(
String username, byte[] encodedUserKey, byte[] signed, byte[] staticData) {
UserPublicKey key = new UserPublicKey(encodedUserKey);
if (!key.isValidSignature(
signed, ArrayOps.concat(username.getBytes(), encodedUserKey, staticData))) return false;
UserPublicKey existingKey = getPublicKey(username);
if (existingKey != null) return false;
String existingUsername = getUsername(key.getPublicKeys());
if (existingUsername.length() > 0) return false;
UserData user = new UserData(username, key.getPublicKeys());
return user.insert();
}
public byte[] decrypt(SymmetricKey key, byte[] iv) {
return key.decrypt(ArrayOps.concat(auth, encrypted), iv);
}