/*
* Copyright (C) 2015 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package keywhiz.auth.bcrypt;
import io.dropwizard.auth.AuthenticationException;
import io.dropwizard.auth.basic.BasicCredentials;
import io.dropwizard.java8.auth.Authenticator;
import java.util.Optional;
import keywhiz.auth.User;
import keywhiz.service.daos.UserDAO;
import org.mindrot.jbcrypt.BCrypt;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static com.google.common.base.Preconditions.checkNotNull;
public class BcryptAuthenticator implements Authenticator<BasicCredentials, User> {
private static final Logger logger = LoggerFactory.getLogger(BcryptAuthenticator.class);
private final UserDAO userDAO;
public BcryptAuthenticator(UserDAO userDAO) {
this.userDAO = checkNotNull(userDAO);
}
@Override public Optional<User> authenticate(BasicCredentials credentials)
throws AuthenticationException {
User user = null;
String username = credentials.getUsername();
if (!User.isSanitizedUsername(username)) {
logger.info("Username: {} must match pattern: {}", username, User.USERNAME_PATTERN);
return Optional.empty();
}
String password = credentials.getPassword();
// Get hashed password column from BCrypt table by username
Optional<String> optionalHashedPwForUser = userDAO.getHashedPassword(username);
if (!optionalHashedPwForUser.isPresent()) {
return Optional.empty();
}
if (BCrypt.checkpw(password, optionalHashedPwForUser.get())) {
user = User.named(username);
}
return Optional.ofNullable(user);
}
}