How to use

decrypt

method

in

com.oberasoftware.jasdb.api.security.CryptoEngine

@Override
public UserSession startSession(Credentials credentials) throws JasDBStorageException {
  User user = userManager.authenticate(credentials);
  String sessionId = UUID.randomUUID().toString();
  String token = UUID.randomUUID().toString();
  CryptoEngine userEncryptionEngine = CryptoFactory.getEngine(user.getEncryptionEngine());
  String encryptedContentKey = user.getEncryptedContentKey();
  String contentKey = userEncryptionEngine.decrypt(user.getPasswordSalt(), credentials.getPassword(), encryptedContentKey);
  encryptedContentKey = userEncryptionEngine.encrypt(user.getPasswordSalt(), token, contentKey);
  UserSession session = new UserSessionImpl(sessionId, token, encryptedContentKey, user);
  userManager.authorize(session, "/", AccessMode.CONNECT);
  secureUserSessionMap.put(sessionId, new SecureUserSession(session));
  return session;
}

private GrantObject decrypt(UserSession session, EncryptedGrants encryptedGrants) throws JasDBStorageException {
  CryptoEngine contentCryptoEngine = CryptoFactory.getEngine();
  String contentKey = contentCryptoEngine.decrypt(session.getUser().getPasswordSalt(), session.getAccessToken(), session.getEncryptedContentKey());
  CryptoEngine cryptoEngine = CryptoFactory.getEngine(encryptedGrants.getEncryptionEngine());
  String decryptedData = cryptoEngine.decrypt(encryptedGrants.getSalt(), contentKey, encryptedGrants.getEncryptedData());
  return GrantObjectMeta.fromEntity(SimpleEntity.fromJson(decryptedData));
}

@Override
public User addUser(UserSession currentSession, String userName, String allowedHost, String password) throws JasDBStorageException {
  authorize(currentSession, "/Users", AccessMode.WRITE);
  User currentUser = currentSession.getUser();
  CryptoEngine cryptoEngine = CryptoFactory.getEngine();
  String contentKey = cryptoEngine.decrypt(currentUser.getPasswordSalt(), currentSession.getAccessToken(), currentSession.getEncryptedContentKey());
  return credentialsProvider.addUser(userName, allowedHost, contentKey, password);
}

private EncryptedGrants encryptGrants(GrantObject grantObject, UserSession userSession) throws JasDBStorageException {
  CryptoEngine cryptoEngine = CryptoFactory.getEngine();
  String contentKey = CryptoFactory.getEngine().decrypt(userSession.getUser().getPasswordSalt(), userSession.getAccessToken(), userSession.getEncryptedContentKey());
  String salt = cryptoEngine.generateSalt();
  String unencryptedData = SimpleEntity.toJson(GrantObjectMeta.toEntity(grantObject));
  String encryptedData = cryptoEngine.encrypt(salt, contentKey, unencryptedData);
  return new EncryptedGrants(grantObject.getObjectName(), encryptedData, salt, cryptoEngine.getDescriptor());
}