nl.surfnet.coin.api.saml.SAMLProvisioner.java Source code

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Here is the source code for nl.surfnet.coin.api.saml.SAMLProvisioner.java

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/*
 * Copyright 2012 SURFnet bv, The Netherlands
 *
 * 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 nl.surfnet.coin.api.saml;

import java.util.Collections;
import java.util.List;

import org.opensaml.saml2.core.Assertion;
import org.opensaml.saml2.core.Attribute;
import org.opensaml.saml2.core.AttributeStatement;
import org.opensaml.xml.XMLObject;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.util.Assert;

import nl.surfnet.spring.security.opensaml.Provisioner;

/**
 * Implementation of Spring-security-opensaml's Provisioner interface, which provisions a UserDetails object based on a SAML Assertion.
 */
public class SAMLProvisioner implements Provisioner {

    private String uuidAttribute;

    /**
     * @param uuidAttribute
     */
    public SAMLProvisioner(String uuidAttribute) {
        super();
        this.uuidAttribute = uuidAttribute;
    }

    @Override
    public UserDetails provisionUser(Assertion assertion) {
        String userId = getValueFromAttributeStatements(assertion, uuidAttribute);
        Assert.hasLength(userId, "SAML assertion does not contain required personId (" + uuidAttribute + ")");
        return new User(userId, "N/A", Collections.singletonList(new SimpleAuthority("USER")));
    }

    public static class SimpleAuthority implements GrantedAuthority {

        private static final long serialVersionUID = 1L;

        String name;

        public SimpleAuthority(String name) {
            this.name = name;
        }

        @Override
        public String getAuthority() {
            return name;
        }
    }

    private String getValueFromAttributeStatements(final Assertion assertion, final String name) {
        final List<AttributeStatement> attributeStatements = assertion.getAttributeStatements();
        for (AttributeStatement attributeStatement : attributeStatements) {
            final List<Attribute> attributes = attributeStatement.getAttributes();
            for (Attribute attribute : attributes) {
                if (name.equals(attribute.getName())) {
                    XMLObject xmlObject = attribute.getAttributeValues().get(0);
                    String nodeValue = xmlObject.getDOM().getFirstChild().getNodeValue();
                    return nodeValue;
                }
            }
        }
        return "";
    }
}