public static boolean interactiveValidation(
     final Project project, final SVNURL url, final String realm, final String kind) {
   final SvnConfiguration17 configuration = SvnConfiguration17.getInstance(project);
   final SvnAuthenticationManager passiveManager =
       configuration.getInteractiveManager(SvnVcs17.getInstance(project));
   return validationImpl(project, url, configuration, passiveManager, true, realm, kind, true);
 }
  private static boolean validationImpl(
      final Project project,
      final SVNURL url,
      final SvnConfiguration17 configuration,
      final SvnAuthenticationManager manager,
      final boolean checkWrite,
      final String realm,
      final String kind,
      boolean interactive) {
    SvnInteractiveAuthenticationProvider.clearCallState();
    try {
      new SVNWCClient(manager, configuration.getOptions(project))
          .doInfo(url, SVNRevision.UNDEFINED, SVNRevision.HEAD);
    } catch (SVNAuthenticationException e) {
      log(e);
      return false;
    } catch (SVNCancelException e) {
      log(e); // auth canceled
      return false;
    } catch (SVNException e) {
      if (e.getErrorMessage().getErrorCode().isAuthentication()) {
        log(e);
        return false;
      }
      LOG.info("some other exc", e);
      if (interactive) {
        VcsBalloonProblemNotifier.showOverChangesView(
            project, "Authentication failed: " + e.getMessage(), MessageType.ERROR);
      }
      return false; /// !!!! any exception means user should be notified that authorization failed
    }

    if (!checkWrite) {
      return true;
    }
    /*if (passive) {
      return SvnInteractiveAuthenticationProvider.wasCalled();
    }*/

    if (SvnInteractiveAuthenticationProvider.wasCalled()
        && SvnInteractiveAuthenticationProvider.wasCancelled()) return false;
    if (SvnInteractiveAuthenticationProvider.wasCalled()) return true;

    final SvnVcs17 svnVcs = SvnVcs17.getInstance(project);

    final SvnInteractiveAuthenticationProvider provider =
        new SvnInteractiveAuthenticationProvider(svnVcs, manager);
    final SVNAuthentication svnAuthentication =
        provider.requestClientAuthentication(kind, url, realm, null, null, true);
    if (svnAuthentication != null) {
      configuration.acknowledge(kind, realm, svnAuthentication);
      try {
        configuration
            .getAuthenticationManager(svnVcs)
            .acknowledgeAuthentication(true, kind, realm, null, svnAuthentication);
      } catch (SVNException e) {
        LOG.info(e);
      }
      return true;
    }
    return false;
  }
 public static boolean passiveValidation(final Project project, final SVNURL url) {
   final SvnConfiguration17 configuration = SvnConfiguration17.getInstance(project);
   final SvnAuthenticationManager passiveManager = configuration.getPassiveAuthenticationManager();
   return validationImpl(project, url, configuration, passiveManager, false, null, null, false);
 }