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1
28 package net.sf.jguard.ext.authentication.loginmodules;
29
30 import java.io.IOException  ;
31 import java.util.Map ;
32 import java.util.logging.Level ;
33 import java.util.logging.Logger ;
34
35 import javax.security.auth.Subject ;
36 import javax.security.auth.callback.Callback ;
37 import javax.security.auth.callback.CallbackHandler ;
38 import javax.security.auth.callback.UnsupportedCallbackException ;
39 import javax.security.auth.login.LoginException ;
40 import javax.security.auth.spi.LoginModule ;
41
42 import net.sf.jguard.ext.authentication.callbacks.JCaptchaCallback;
43
44 import com.octo.captcha.module.config.CaptchaModuleConfig;
45 import com.octo.captcha.service.CaptchaService;
46 import com.octo.captcha.service.CaptchaServiceException;
47
52 public class JCaptchaLoginModule implements LoginModule {
53 private static Logger logger = Logger.getLogger(JCaptchaLoginModule.class.getName());
54 private static final String CAPTCHA_ANSWER_FIELD = "captchaAnswerField";
55 private Class serviceClass;
56 private CaptchaService service;
57 private String captchaAnswerField;
58 private CallbackHandler callbackHandler;
59 private Subject subject;
60 private Map options;
61 private Map sharedState;
62 private boolean loginOK = true;
63
64 public void initialize(Subject subj,CallbackHandler cbkHandler,Map sState,Map opts){
65 this.subject = subj;
66 this.callbackHandler = cbkHandler;
67 this.sharedState = sState;
68 this.options = opts;
69 captchaAnswerField = (String ) opts.get(JCaptchaLoginModule.CAPTCHA_ANSWER_FIELD);
70 if(captchaAnswerField==null ||captchaAnswerField.equals("")){
71 captchaAnswerField="captchaAnswer";
72 }
73
74 try {
75 serviceClass = Class.forName(CaptchaModuleConfig.getInstance().getServiceClass());
76 } catch (ClassNotFoundException e) {
77 logger.severe(" JCaptcha service class cannot be found ");
78 }
79 }
80
81 public boolean login() throws LoginException {
82 String sessionID = "-1";
83 String captchaAnswer = "";
84 boolean skipJCaptchaChallenge = false;
85
86 if (callbackHandler == null){
87 loginOK = false;
88 throw new JCaptchaLoginException("there is no CallbackHandler to validate the JCaptcha Answer");
89 }
90 Callback [] callbacks = new Callback [1];
91 callbacks[0] = new JCaptchaCallback();
92
93 try {
94 callbackHandler.handle(callbacks);
95 JCaptchaCallback jcaptchaCallback = (JCaptchaCallback) callbacks[0];
96 captchaAnswer = jcaptchaCallback.getCaptchaAnswer();
97 skipJCaptchaChallenge = jcaptchaCallback.isSkipJCaptchaChallenge();
98 sessionID = jcaptchaCallback.getSessionID();
99 logger.log(Level.FINE,"session ID="+sessionID);
100 service = jcaptchaCallback.getCaptchaService();
101 logger.log(Level.FINE,"service="+service);
102
103 if(skipJCaptchaChallenge==true){
104 return false;
105 }
106
107 if(service == null){
108 loginOK = false;
109 throw new JCaptchaLoginException(" JCaptcha service is null: it has not been properly initialized ");
110 }
111 } catch (IOException e) {
112 loginOK = false;
113 throw new JCaptchaLoginException(e.getMessage());
114 } catch (UnsupportedCallbackException e) {
115 loginOK = false;
116 throw new JCaptchaLoginException(e.getMessage());
117 }
118 Boolean valid = null;
119 try{
120 valid = service.validateResponseForID(sessionID,captchaAnswer);
121 }catch(CaptchaServiceException e){
122 logger.log(Level.WARNING,e.getMessage());
123 loginOK = false;
124 throw new JCaptchaLoginException(" an error has occured in CAPTCHA validation ");
125 }
126
127 if(valid.booleanValue()==false){
128 loginOK = false;
129 throw new JCaptchaLoginException(" invalid JCaptcha Answer ");
130 }
131 return true;
132 }
133
134 public boolean commit() throws LoginException {
135 if(loginOK){
136 return true;
137 }else{
138 return false;
139 }
140 }
141
142 public boolean abort() throws LoginException {
143 return true;
144 }
145
146 public boolean logout() throws LoginException {
147 return true;
148 }
149
150 }
151 |
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