org.activiti.app.security.CustomDaoAuthenticationProvider.java Source code

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Here is the source code for org.activiti.app.security.CustomDaoAuthenticationProvider.java

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/* 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.activiti.app.security;

import org.apache.commons.lang3.StringUtils;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;

/**
 * @author jbarrez
 */
public class CustomDaoAuthenticationProvider extends DaoAuthenticationProvider {

    protected void additionalAuthenticationChecks(
            org.springframework.security.core.userdetails.UserDetails userDetails,
            org.springframework.security.authentication.UsernamePasswordAuthenticationToken authentication)
            throws org.springframework.security.core.AuthenticationException {

        // Overriding this method to catch empty/null passwords. This happens when users are synced with LDAP sync:
        // they will have an external id, but no password (password is checked against ldap).
        //
        // The default DaoAuthenticationProvider will choke on an empty password (an arrayIndexOutOfBoundsException 
        // somewhere deep in the bowels of password encryption), hence this override
        if (StringUtils.isEmpty(userDetails.getPassword())) {
            throw new BadCredentialsException(messages
                    .getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
        }

        super.additionalAuthenticationChecks(userDetails, authentication);

    };

}