Esempio n. 1
0
  // Hand out a request token if the consumer key and secret are valid
  private void createRequestToken(
      HttpServletRequest servletRequest, HttpServletResponse servletResponse)
      throws IOException, OAuthException, URISyntaxException {
    OAuthMessage requestMessage = OAuthServlet.getMessage(servletRequest, null);

    String consumerKey = requestMessage.getConsumerKey();
    if (consumerKey == null) {
      OAuthProblemException e = new OAuthProblemException(OAuth.Problems.PARAMETER_ABSENT);
      e.setParameter(OAuth.Problems.OAUTH_PARAMETERS_ABSENT, OAuth.OAUTH_CONSUMER_KEY);
      throw e;
    }
    OAuthConsumer consumer = dataStore.getConsumer(consumerKey);

    if (consumer == null) throw new OAuthProblemException(OAuth.Problems.CONSUMER_KEY_UNKNOWN);

    OAuthAccessor accessor = new OAuthAccessor(consumer);
    VALIDATOR.validateMessage(requestMessage, accessor);

    String callback = null;
    if (enableSignedCallbacks) {
      callback = requestMessage.getParameter(OAuth.OAUTH_CALLBACK);
    }
    if (callback == null && !enableOAuth10) {
      OAuthProblemException e = new OAuthProblemException(OAuth.Problems.PARAMETER_ABSENT);
      e.setParameter(OAuth.Problems.OAUTH_PARAMETERS_ABSENT, OAuth.OAUTH_CALLBACK);
      throw e;
    }

    // generate request_token and secret
    OAuthEntry entry =
        dataStore.generateRequestToken(
            consumerKey, requestMessage.getParameter(OAuth.OAUTH_VERSION), callback);

    List<Parameter> responseParams =
        OAuth.newList(OAuth.OAUTH_TOKEN, entry.token, OAuth.OAUTH_TOKEN_SECRET, entry.tokenSecret);
    if (callback != null) {
      responseParams.add(new Parameter(OAuthConstants.OAUTH_CALLBACK_CONFIRMED, "true"));
    }
    sendResponse(servletResponse, responseParams);
  }
Esempio n. 2
0
  private OAuthEntry getValidatedEntry(OAuthMessage requestMessage)
      throws IOException, ServletException, OAuthException, URISyntaxException {

    OAuthEntry entry = dataStore.getEntry(requestMessage.getToken());
    if (entry == null) throw new OAuthProblemException(OAuth.Problems.TOKEN_REJECTED);

    if (entry.type != OAuthEntry.Type.REQUEST)
      throw new OAuthProblemException(OAuth.Problems.TOKEN_USED);

    if (entry.isExpired()) throw new OAuthProblemException(OAuth.Problems.TOKEN_EXPIRED);

    // find consumer key, compare with supplied value, if present.

    if (requestMessage.getConsumerKey() == null) {
      OAuthProblemException e = new OAuthProblemException(OAuth.Problems.PARAMETER_ABSENT);
      e.setParameter(OAuth.Problems.OAUTH_PARAMETERS_ABSENT, OAuth.OAUTH_CONSUMER_KEY);
      throw e;
    }

    String consumerKey = entry.consumerKey;
    if (!consumerKey.equals(requestMessage.getConsumerKey()))
      throw new OAuthProblemException(OAuth.Problems.CONSUMER_KEY_REFUSED);

    OAuthConsumer consumer = dataStore.getConsumer(consumerKey);

    if (consumer == null) throw new OAuthProblemException(OAuth.Problems.CONSUMER_KEY_UNKNOWN);

    OAuthAccessor accessor = new OAuthAccessor(consumer);

    accessor.requestToken = entry.token;
    accessor.tokenSecret = entry.tokenSecret;

    VALIDATOR.validateMessage(requestMessage, accessor);

    return entry;
  }
Esempio n. 3
0
 /**
  * Check that the message is valid.
  *
  * @throws IOException
  * @throws URISyntaxException
  * @throws OAuthProblemException the message is invalid
  */
 public void validateMessage(OAuthAccessor accessor, OAuthValidator validator)
     throws OAuthException, IOException, URISyntaxException {
   validator.validateMessage(this, accessor);
 }
Esempio n. 4
0
  protected void validate(Map payload, boolean isTrustedConsumer) throws LTIException {
    // check parameters
    String lti_message_type = (String) payload.get(BasicLTIConstants.LTI_MESSAGE_TYPE);
    String lti_version = (String) payload.get(BasicLTIConstants.LTI_VERSION);
    String oauth_consumer_key = (String) payload.get("oauth_consumer_key");
    String resource_link_id = (String) payload.get(BasicLTIConstants.RESOURCE_LINK_ID);
    String user_id = (String) payload.get(BasicLTIConstants.USER_ID);
    String context_id = (String) payload.get(BasicLTIConstants.CONTEXT_ID);

    boolean launch = true;
    if (BasicLTIUtil.equals(lti_message_type, "basic-lti-launch-request")) {
      launch = true;
    } else if (BasicLTIUtil.equals(lti_message_type, "ContentItemSelectionRequest")) {
      launch = false;
    } else {
      throw new LTIException("launch.invalid", "lti_message_type=" + lti_message_type, null);
    }

    if (!BasicLTIUtil.equals(lti_version, "LTI-1p0")) {
      throw new LTIException("launch.invalid", "lti_version=" + lti_version, null);
    }

    if (BasicLTIUtil.isBlank(oauth_consumer_key)) {
      throw new LTIException("launch.missing", "oauth_consumer_key", null);
    }

    if (launch && BasicLTIUtil.isBlank(resource_link_id)) {
      throw new LTIException("launch.missing", "resource_link_id", null);
    }

    if (BasicLTIUtil.isBlank(user_id)) {
      throw new LTIException("launch.missing", "user_id", null);
    }
    if (M_log.isDebugEnabled()) {
      M_log.debug("user_id=" + user_id);
    }

    // check tool_id
    String tool_id = (String) payload.get("tool_id");
    if (tool_id == null) {
      throw new LTIException("launch.tool_id.required", null, null);
    }

    // Trim off the leading slash and any trailing space
    tool_id = tool_id.substring(1).trim();
    if (M_log.isDebugEnabled()) {
      M_log.debug("tool_id=" + tool_id);
    }
    // store modified tool_id back in payload
    payload.put("tool_id", tool_id);
    final String allowedToolsConfig =
        ServerConfigurationService.getString("basiclti.provider.allowedtools", "");

    final String[] allowedTools = allowedToolsConfig.split(":");
    final List<String> allowedToolsList = Arrays.asList(allowedTools);

    if (launch && allowedTools != null && !allowedToolsList.contains(tool_id)) {
      throw new LTIException("launch.tool.notallowed", tool_id, null);
    }
    final Tool toolCheck = ToolManager.getTool(tool_id);
    if (launch && toolCheck == null) {
      throw new LTIException("launch.tool.notfound", tool_id, null);
    }

    // Check for the ext_sakai_provider_eid param. If set, this will contain the eid that we are to
    // use
    // in place of using the user_id parameter
    // WE still need that parameter though, so translate it from the given eid.
    boolean useProvidedEid = false;
    String ext_sakai_provider_eid = (String) payload.get(BasicLTIConstants.EXT_SAKAI_PROVIDER_EID);
    if (BasicLTIUtil.isNotBlank(ext_sakai_provider_eid)) {
      useProvidedEid = true;
      try {
        user_id = UserDirectoryService.getUserId(ext_sakai_provider_eid);
      } catch (Exception e) {
        M_log.error(e.getLocalizedMessage(), e);
        throw new LTIException(
            "launch.provided.eid.invalid", "ext_sakai_provider_eid=" + ext_sakai_provider_eid, e);
      }
    }

    if (M_log.isDebugEnabled()) {
      M_log.debug("ext_sakai_provider_eid=" + ext_sakai_provider_eid);
    }

    // Contextualize the context_id with the OAuth consumer key
    // Also use the resource_link_id for the context_id if we did not get a context_id
    // BLTI-31: if trusted, context_id is required and use the param without modification
    if (BasicLTIUtil.isBlank(context_id)) {
      if (isTrustedConsumer) {
        throw new LTIException("launch.missing", context_id, null);
      } else {
        context_id = "res:" + resource_link_id;
        payload.put(BasicLTIConstants.CONTEXT_ID, context_id);
      }
    }

    // Check if context_id is simply a ~. If so, get the id of that user's My Workspace site
    // and use that to construct the full context_id
    if (BasicLTIUtil.equals(context_id, "~")) {
      if (useProvidedEid) {
        String userSiteId = null;
        try {
          userSiteId = SiteService.getUserSiteId(user_id);
        } catch (Exception e) {
          M_log.warn("Failed to get My Workspace site for user_id:" + user_id);
          M_log.error(e.getLocalizedMessage(), e);
          throw new LTIException("launch.user.site.unknown", "user_id=" + user_id, e);
        }
        context_id = userSiteId;
        payload.put(BasicLTIConstants.CONTEXT_ID, context_id);
      }
    }

    if (M_log.isDebugEnabled()) {
      M_log.debug("context_id=" + context_id);
    }

    // Lookup the secret
    final String configPrefix = "basiclti.provider." + oauth_consumer_key + ".";
    final String oauth_secret = ServerConfigurationService.getString(configPrefix + "secret", null);
    if (oauth_secret == null) {
      throw new LTIException("launch.key.notfound", oauth_consumer_key, null);
    }
    final OAuthMessage oam = (OAuthMessage) payload.get("oauth_message");

    final String forcedURIScheme =
        ServerConfigurationService.getString("basiclti.provider.forcedurischeme", null);

    if (forcedURIScheme != null) {
      try {
        URI testURI = new URI(oam.URL);
        URI newURI = new URI(forcedURIScheme, testURI.getSchemeSpecificPart(), null);
        oam.URL = newURI.toString();
      } catch (URISyntaxException use) {
      }
    }
    final OAuthValidator oav = new SimpleOAuthValidator();
    final OAuthConsumer cons =
        new OAuthConsumer(
            "about:blank#OAuth+CallBack+NotUsed", oauth_consumer_key, oauth_secret, null);

    final OAuthAccessor acc = new OAuthAccessor(cons);

    String base_string = null;
    try {
      base_string = OAuthSignatureMethod.getBaseString(oam);
    } catch (Exception e) {
      M_log.error(e.getLocalizedMessage(), e);
      base_string = null;
    }

    try {
      oav.validateMessage(oam, acc);
    } catch (Exception e) {
      M_log.warn("Provider failed to validate message");
      M_log.warn(e.getLocalizedMessage(), e);
      if (base_string != null) {
        M_log.warn(base_string);
      }
      throw new LTIException("launch.no.validate", context_id, e);
    }

    final Session sess = SessionManager.getCurrentSession();

    if (sess == null) {
      throw new LTIException("launch.no.session", context_id, null);
    }
  }