2 * Copyright (c) 2016 Brocade Communications Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.aaa.shiro.filters;
11 import com.google.common.base.Preconditions;
12 import org.apache.shiro.authc.AuthenticationToken;
13 import org.apache.shiro.authc.UsernamePasswordToken;
16 * Utility methods for forming audit trail output based on an <code>AuthenticationToken</code>.
18 * @author Ryan Goulding (ryandgoulding@gmail.com)
20 public class AuthenticationTokenUtils {
23 * default value used in messaging when the "user" field is unparsable from the HTTP REST request
25 static final String DEFAULT_USERNAME = "an unknown user";
28 * default value used in messaging when the "user" field is not present in the HTTP REST request, implying
29 * a different implementation of <code>AuthenticationToken</code> such as <code>CasToken</code>.
31 static final String DEFAULT_TOKEN = "an un-parsable token type";
34 * default value used in messaging when the "host" field cannot be determined.
36 static final String DEFAULT_HOSTNAME = "an unknown host";
38 private AuthenticationTokenUtils() {
39 // private to prevent instantiation
43 * Determines whether the supplied <code>Token</code> is a <code>UsernamePasswordToken</code>.
45 * @param token A generic <code>Token</code>, which might be a <code>UsernamePasswordToken</code>
46 * @return Whether the supplied <code>Token</code> is a <code>UsernamePasswordToken</code>
48 public static boolean isUsernamePasswordToken(final AuthenticationToken token) {
49 return token instanceof UsernamePasswordToken;
53 * Extracts the username if possible. If the supplied token is a <code>UsernamePasswordToken</code>
54 * and the username field is not set, <code>DEFAULT_USERNAME</code> is returned. If the supplied
55 * token is not a <code>UsernamePasswordToken</code> (i.e., a <code>CasToken</code> or other
56 * implementation of <code>AuthenticationToken</code>), then <code>DEFAULT_TOKEN</code> is
59 * @param token An <code>AuthenticationToken</code>, possibly a <code>UsernamePasswordToken</code>
60 * @return the username, <code>DEFAULT_USERNAME</code> or <code>DEFAULT_TOKEN</code> depending on input
62 public static String extractUsername(final AuthenticationToken token) {
63 if (isUsernamePasswordToken(token)) {
64 final UsernamePasswordToken upt = (UsernamePasswordToken) token;
65 return extractField(upt.getUsername(), DEFAULT_USERNAME);
71 * Extracts the hostname if possible. If the supplied token is a <code>UsernamePasswordToken</code>
72 * and the hostname field is not set, <code>DEFAULT_HOSTNAME</code> is returned. If the supplied
73 * token is not a <code>UsernamePasswordToken</code> (i.e., a <code>CasToken</code> or other
74 * implementation of <code>AuthenticationToken</code>), then <code>DEFAULT_HOSTNAME</code> is
77 * @param token An <code>AuthenticationToken</code>, possibly a <code>UsernamePasswordToken</code>
78 * @return the hostname, or <code>DEFAULT_USERNAME</code> depending on input
80 public static String extractHostname(final AuthenticationToken token) {
81 if (isUsernamePasswordToken(token)) {
82 final UsernamePasswordToken upt = (UsernamePasswordToken) token;
83 return extractField(upt.getHost(), DEFAULT_HOSTNAME);
85 return DEFAULT_HOSTNAME;
89 * Utility method to generate a generic message indicating Authentication was unsuccessful.
91 * @param token An <code>AuthenticationToken</code>, possibly a <code>UsernamePasswordToken</code>
92 * @return A message indicating authentication was unsuccessful
94 public static String generateUnsuccessfulAuthenticationMessage(final AuthenticationToken token) {
95 final String username = extractUsername(token);
96 final String remoteHostname = extractHostname(token);
97 return String.format("Unsuccessful authentication attempt by %s from %s", username, remoteHostname);
101 * Utility method to generate a generic message indicating Authentication was successful.
103 * @param token An <code>AuthenticationToken</code>, possibly a <code>UsernamePasswordToken</code>
104 * @return A message indicating authentication was successful
106 public static String generateSuccessfulAuthenticationMessage(final AuthenticationToken token) {
107 final String username = extractUsername(token);
108 final String remoteHostname = extractHostname(token);
109 return String.format("Successful authentication attempt by %s from %s", username, remoteHostname);
113 * Utility method that returns <code>field</code>, or <code>defaultValue</code> if <code>field</code> is null.
115 * @param field A generic string, which is possibly null.
116 * @param defaultValue A non-null value returned if <code>field</code> is null
117 * @return <code>field</code> or <code>defaultValue</code> if field is null
118 * @throws IllegalArgumentException If <code>defaultValue</code> is null
120 private static String extractField(final String field, final String defaultValue)
121 throws IllegalArgumentException {
123 Preconditions.checkNotNull(defaultValue, "defaultValue can't be null");