}
}
public boolean login() throws LoginException {
File f = new File(usersFile);
Properties users;
try {
users = new Properties(f);
} catch (IOException ioe) {
throw new LoginException("Unable to load user properties file " + f);
}
Callback[] callbacks = new Callback[2];
callbacks[0] = new NameCallback("Username: ");
callbacks[1] = new PublickeyCallback();
try {
callbackHandler.handle(callbacks);
} catch (IOException ioe) {
throw new LoginException(ioe.getMessage());
} catch (UnsupportedCallbackException uce) {
throw new LoginException(uce.getMessage() + " not available to obtain information from user");
}
String user = ((NameCallback) callbacks[0]).getName();
if (user == null) {
throw new FailedLoginException("Unable to retrieve user name");
}
PublicKey key = ((PublickeyCallback) callbacks[1]).getPublicKey();
if (key == null) {
throw new FailedLoginException("Unable to retrieve public key");
}
// user infos container read from the users properties file
String userInfos = null;
try {
userInfos = (String) users.get(user);
} catch (NullPointerException e) {
//error handled in the next statement
}
if (userInfos == null) {
if (!this.detailedLoginExcepion) {
throw new FailedLoginException("login failed");
} else {
throw new FailedLoginException("User " + user + " does not exist");
}
}
// the password is in the first position
String[] infos = userInfos.split(",");
String storedKey = infos[0];
// check if the stored password is flagged as encrypted
String encryptedKey = getEncryptedPassword(storedKey);
if (!storedKey.equals(encryptedKey)) {
if (debug) {
LOG.debug("The key isn't flagged as encrypted, encrypt it.");
}
if (debug) {
LOG.debug("Rebuild the user informations string.");
}
userInfos = encryptedKey + ",";
for (int i = 2; i < infos.length; i++) {
if (i == (infos.length - 1)) {
userInfos = userInfos + infos[i];
} else {
userInfos = userInfos + infos[i] + ",";
}
}
if (debug) {
LOG.debug("Push back the user informations in the users properties.");
}
users.put(user, userInfos);
try {
if (debug) {
LOG.debug("Store the users properties file.");
}
users.save();
} catch (IOException ioe) {
LOG.warn("Unable to write user properties file " + f, ioe);
}
storedKey = encryptedKey;
}
// check the provided password
if (!checkPassword(getString(key), storedKey)) {
if (!this.detailedLoginExcepion) {
throw new FailedLoginException("login failed");
} else {
throw new FailedLoginException("Public key for " + user + " does not match");
}
}
principals = new HashSet<Principal>();
principals.add(new UserPrincipal(user));
for (int i = 1; i < infos.length; i++) {
principals.add(new RolePrincipal(infos[i]));
}
users.clear();
if (debug) {
LOG.debug("Successfully logged in " + user);
}
return true;