KerberosAuthenticationHandler implements AuthenticationHandler { @Override public AuthenticationToken authenticate(HttpServletRequest request, final HttpServletResponse response) throws IOException, AuthenticationException { AuthenticationToken token = null; String authorization = request.getHeader( KerberosAuthenticator.AUTHORIZATION); if (authorization == null || !authorization.startsWith(KerberosAuthenticator.NEGOTIATE)) { response.setHeader(WWW_AUTHENTICATE, KerberosAuthenticator.NEGOTIATE); response.setStatus(HttpServletResponse.SC_UNAUTHORIZED); if (authorization == null) { LOG.trace("SPNEGO starting for url: {}", request.getRequestURL()); } else { LOG.warn("'" + KerberosAuthenticator.AUTHORIZATION + "' does not start with '" + KerberosAuthenticator.NEGOTIATE + "' : {}", authorization); } } else { authorization = authorization.substring( KerberosAuthenticator.NEGOTIATE.length()).trim(); final Base64 base64 = new Base64(0); final byte[] clientToken = base64.decode(authorization); try { final String serverPrincipal = KerberosUtil.getTokenServerName(clientToken); if (!serverPrincipal.startsWith("HTTP/")) { throw new IllegalArgumentException( "Invalid server principal " + serverPrincipal + "decoded from client request"); } token = Subject.doAs(serverSubject, new PrivilegedExceptionAction<AuthenticationToken>() { @Override public AuthenticationToken run() throws Exception { return runWithPrincipal(serverPrincipal, clientToken, base64, response); } }); } catch (PrivilegedActionException ex) { if (ex.getException() instanceof IOException) { throw (IOException) ex.getException(); } else { throw new AuthenticationException(ex.getException()); } } catch (Exception ex) { throw new AuthenticationException(ex); } } return token; } KerberosAuthenticationHandler();  KerberosAuthenticationHandler(String type); @Override void init(Properties config); @Override void destroy(); @Override String getType(); @Override boolean managementOperation(AuthenticationToken token,
                                     HttpServletRequest request,
                                     HttpServletResponse response); @Override AuthenticationToken authenticate(HttpServletRequest request,
      final HttpServletResponse response); static final Logger LOG; static final String TYPE; static final String PRINCIPAL; static final String KEYTAB; static final String NAME_RULES; static final String RULE_MECHANISM; }
@Test(timeout=60000) public void testRequestWithIncompleteAuthorization() throws Exception { HttpServletRequest request = Mockito.mock(HttpServletRequest.class); HttpServletResponse response = Mockito.mock(HttpServletResponse.class); Mockito.when(request.getHeader(KerberosAuthenticator.AUTHORIZATION)) .thenReturn(KerberosAuthenticator.NEGOTIATE); try { handler.authenticate(request, response); Assert.fail(); } catch (AuthenticationException ex) { } catch (Exception ex) { Assert.fail(); } }