package gnu.crypto.sasl.srp;
// ----------------------------------------------------------------------------
// $Id: SRPAuthInfoProvider.java,v 1.3 2005/10/06 04:24:18 rsdio Exp $
//
// Copyright (C) 2003 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// GNU Crypto is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; see the file COPYING. If not, write to the
//
// Free Software Foundation Inc.,
// 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301
// USA
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give
// you permission to link this library with independent modules to
// produce an executable, regardless of the license terms of these
// independent modules, and to copy and distribute the resulting
// executable under terms of your choice, provided that you also meet,
// for each linked independent module, the terms and conditions of the
// license of that module. An independent module is a module which is
// not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the
// library, but you are not obligated to do so. If you do not wish to
// do so, delete this exception statement from your version.
// ----------------------------------------------------------------------------
import gnu.crypto.Registry;
import gnu.crypto.sasl.IAuthInfoProvider;
import gnu.crypto.sasl.NoSuchUserException;
import gnu.crypto.util.Util;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.security.sasl.AuthenticationException;
/**
* <p>The SRP mechanism authentication information provider implementation.</p>
*
* @version $Revision: 1.3 $
*/
public class SRPAuthInfoProvider implements IAuthInfoProvider {
// Constants and variables
// -------------------------------------------------------------------------
private PasswordFile passwordFile = null;
// Constructor(s)
// -------------------------------------------------------------------------
// implicit 0-args constrcutor
// Class methods
// -------------------------------------------------------------------------
// Instance methods
// -------------------------------------------------------------------------
// IAuthInfoProvider interface implementation ------------------------------
public void activate(Map context) throws AuthenticationException {
try {
if (context == null) {
passwordFile = new PasswordFile();
} else {
passwordFile = (PasswordFile) context.get(SRPRegistry.PASSWORD_DB);
if (passwordFile == null) {
String pfn = (String) context.get(SRPRegistry.PASSWORD_FILE);
if (pfn == null) {
passwordFile = new PasswordFile();
} else {
passwordFile = new PasswordFile(pfn);
}
}
}
} catch (IOException x) {
throw new AuthenticationException("activate()", x);
}
}
public void passivate() throws AuthenticationException {
passwordFile = null;
}
public boolean contains(String userName) throws AuthenticationException {
if (passwordFile == null) {
throw new AuthenticationException("contains()", new IllegalStateException());
}
boolean result = false;
try {
result = passwordFile.contains(userName);
} catch (IOException x) {
throw new AuthenticationException("contains()", x);
}
return result;
}
public Map lookup(Map userID) throws AuthenticationException {
if (passwordFile == null) {
throw new AuthenticationException("lookup()", new IllegalStateException());
}
Map result = new HashMap();
try {
String userName = (String) userID.get(Registry.SASL_USERNAME);
if (userName == null) {
throw new NoSuchUserException("");
}
String mdName = (String) userID.get(SRPRegistry.MD_NAME_FIELD);
String[] data = passwordFile.lookup(userName, mdName);
result.put(SRPRegistry.USER_VERIFIER_FIELD, data[0]);
result.put(SRPRegistry.SALT_FIELD, data[1]);
result.put(SRPRegistry.CONFIG_NDX_FIELD, data[2]);
} catch (Exception x) {
if (x instanceof AuthenticationException) {
throw (AuthenticationException) x;
}
throw new AuthenticationException("lookup()", x);
}
return result;
}
public void update(Map userCredentials) throws AuthenticationException {
if (passwordFile == null)
throw new AuthenticationException("update()", new IllegalStateException());
try {
String userName = (String) userCredentials.get(Registry.SASL_USERNAME);
String password = (String) userCredentials.get(Registry.SASL_PASSWORD);
String salt = (String) userCredentials.get(SRPRegistry.SALT_FIELD);
String config = (String) userCredentials.get(SRPRegistry.CONFIG_NDX_FIELD);
if (salt == null || config == null) {
passwordFile.changePasswd(userName, password);
} else {
passwordFile.add(userName, password, Util.fromBase64(salt), config);
}
} catch (Exception x) {
if (x instanceof AuthenticationException) {
throw (AuthenticationException) x;
}
throw new AuthenticationException("update()", x);
}
}
public Map getConfiguration(String mode) throws AuthenticationException {
if (passwordFile == null) {
throw new AuthenticationException("getConfiguration()", new IllegalStateException());
}
Map result = new HashMap();
try {
String[] data = passwordFile.lookupConfig(mode);
result.put(SRPRegistry.SHARED_MODULUS, data[0]);
result.put(SRPRegistry.FIELD_GENERATOR, data[1]);
} catch (Exception x) {
if (x instanceof AuthenticationException) {
throw (AuthenticationException) x;
}
throw new AuthenticationException("getConfiguration()", x);
}
return result;
}
}