/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* 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 org.springframework.security.authentication.dao;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.InternalAuthenticationServiceException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.authentication.encoding.PasswordEncoder;
import org.springframework.security.authentication.encoding.PlaintextPasswordEncoder;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.util.Assert;
/**
* An {@link AuthenticationProvider} implementation that retrieves user details from a
* {@link UserDetailsService}.
*
* @author Ben Alex
* @author Rob Winch
*/
public class DaoAuthenticationProvider extends AbstractUserDetailsAuthenticationProvider {
// ~ Static fields/initializers
// =====================================================================================
/**
* The plaintext password used to perform
* {@link PasswordEncoder#isPasswordValid(String, String, Object)} on when the user is
* not found to avoid SEC-2056.
*/
private static final String USER_NOT_FOUND_PASSWORD = "userNotFoundPassword";
// ~ Instance fields
// ================================================================================================
private PasswordEncoder passwordEncoder;
/**
* The password used to perform
* {@link PasswordEncoder#isPasswordValid(String, String, Object)} on when the user is
* not found to avoid SEC-2056. This is necessary, because some
* {@link PasswordEncoder} implementations will short circuit if the password is not
* in a valid format.
*/
private String userNotFoundEncodedPassword;
private SaltSource saltSource;
private UserDetailsService userDetailsService;
public DaoAuthenticationProvider() {
setPasswordEncoder(new PlaintextPasswordEncoder());
}
// ~ Methods
// ========================================================================================================
@SuppressWarnings("deprecation")
protected void additionalAuthenticationChecks(UserDetails userDetails,
UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException {
Object salt = null;
if (this.saltSource != null) {
salt = this.saltSource.getSalt(userDetails);
}
if (authentication.getCredentials() == null) {
logger.debug("Authentication failed: no credentials provided");
throw new BadCredentialsException(messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.badCredentials",
"Bad credentials"));
}
String presentedPassword = authentication.getCredentials().toString();
if (!passwordEncoder.isPasswordValid(userDetails.getPassword(),
presentedPassword, salt)) {
logger.debug("Authentication failed: password does not match stored value");
throw new BadCredentialsException(messages.getMessage(
"AbstractUserDetailsAuthenticationProvider.badCredentials",
"Bad credentials"));
}
}
protected void doAfterPropertiesSet() throws Exception {
Assert.notNull(this.userDetailsService, "A UserDetailsService must be set");
}
protected final UserDetails retrieveUser(String username,
UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException {
UserDetails loadedUser;
try {
loadedUser = this.getUserDetailsService().loadUserByUsername(username);
}
catch (UsernameNotFoundException notFound) {
if (authentication.getCredentials() != null) {
String presentedPassword = authentication.getCredentials().toString();
passwordEncoder.isPasswordValid(userNotFoundEncodedPassword,
presentedPassword, null);
}
throw notFound;
}
catch (Exception repositoryProblem) {
throw new InternalAuthenticationServiceException(
repositoryProblem.getMessage(), repositoryProblem);
}
if (loadedUser == null) {
throw new InternalAuthenticationServiceException(
"UserDetailsService returned null, which is an interface contract violation");
}
return loadedUser;
}
/**
* Sets the PasswordEncoder instance to be used to encode and validate passwords. If
* not set, the password will be compared as plain text.
* <p>
* For systems which are already using salted password which are encoded with a
* previous release, the encoder should be of type
* {@code org.springframework.security.authentication.encoding.PasswordEncoder}.
* Otherwise, the recommended approach is to use
* {@code org.springframework.security.crypto.password.PasswordEncoder}.
*
* @param passwordEncoder must be an instance of one of the {@code PasswordEncoder}
* types.
*/
public void setPasswordEncoder(Object passwordEncoder) {
Assert.notNull(passwordEncoder, "passwordEncoder cannot be null");
if (passwordEncoder instanceof PasswordEncoder) {
setPasswordEncoder((PasswordEncoder) passwordEncoder);
return;
}
if (passwordEncoder instanceof org.springframework.security.crypto.password.PasswordEncoder) {
final org.springframework.security.crypto.password.PasswordEncoder delegate = (org.springframework.security.crypto.password.PasswordEncoder) passwordEncoder;
setPasswordEncoder(new PasswordEncoder() {
public String encodePassword(String rawPass, Object salt) {
checkSalt(salt);
return delegate.encode(rawPass);
}
public boolean isPasswordValid(String encPass, String rawPass, Object salt) {
checkSalt(salt);
return delegate.matches(rawPass, encPass);
}
private void checkSalt(Object salt) {
Assert.isNull(salt,
"Salt value must be null when used with crypto module PasswordEncoder");
}
});
return;
}
throw new IllegalArgumentException(
"passwordEncoder must be a PasswordEncoder instance");
}
private void setPasswordEncoder(PasswordEncoder passwordEncoder) {
Assert.notNull(passwordEncoder, "passwordEncoder cannot be null");
this.userNotFoundEncodedPassword = passwordEncoder.encodePassword(
USER_NOT_FOUND_PASSWORD, null);
this.passwordEncoder = passwordEncoder;
}
protected PasswordEncoder getPasswordEncoder() {
return passwordEncoder;
}
/**
* The source of salts to use when decoding passwords. <code>null</code> is a valid
* value, meaning the <code>DaoAuthenticationProvider</code> will present
* <code>null</code> to the relevant <code>PasswordEncoder</code>.
* <p>
* Instead, it is recommended that you use an encoder which uses a random salt and
* combines it with the password field. This is the default approach taken in the
* {@code org.springframework.security.crypto.password} package.
*
* @param saltSource to use when attempting to decode passwords via the
* <code>PasswordEncoder</code>
*/
public void setSaltSource(SaltSource saltSource) {
this.saltSource = saltSource;
}
protected SaltSource getSaltSource() {
return saltSource;
}
public void setUserDetailsService(UserDetailsService userDetailsService) {
this.userDetailsService = userDetailsService;
}
protected UserDetailsService getUserDetailsService() {
return userDetailsService;
}
}