com.emergya.spring.security.oauth.google.GoogleAccessTokenConverter.java Source code

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Here is the source code for com.emergya.spring.security.oauth.google.GoogleAccessTokenConverter.java

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/**
 * *****************************************************************************
 * Cloud Foundry Copyright (c) [2009-2014] Pivotal Software, Inc. All Rights Reserved.
 *
 * This product is licensed to you under the Apache License, Version 2.0 (the "License"). You may not use this product except in
 * compliance with the License.
 *
 * This product includes a number of subcomponents with separate copyright notices and license terms. Your use of these
 * subcomponents is subject to the terms and conditions of the subcomponent's license, as noted in the LICENSE file.
 * *****************************************************************************
 */
package com.emergya.spring.security.oauth.google;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.provider.OAuth2Authentication;
import org.springframework.security.oauth2.provider.OAuth2Request;
import org.springframework.security.oauth2.provider.token.DefaultAccessTokenConverter;
import org.springframework.security.oauth2.provider.token.UserAuthenticationConverter;
import org.springframework.stereotype.Component;

/**
 * Copied the DefaultAccessTokenConverter and modified for Google token details.
 */
@Component
public class GoogleAccessTokenConverter extends DefaultAccessTokenConverter {

    @Autowired
    private UserAuthenticationConverter userTokenConverter;

    /**
     * GoogleAccessTokenConverter's constructor.
     */
    public GoogleAccessTokenConverter() {

    }

    /**
     * Converter for the part of the data in the token representing a user.
     *
     * @param newUserTokenConverter the userTokenConverter to set
     */
    @Override
    public final void setUserTokenConverter(final UserAuthenticationConverter newUserTokenConverter) {
        this.userTokenConverter = newUserTokenConverter;
        super.setUserTokenConverter(newUserTokenConverter);
    }

    /**
     * Creates an OAuth2Authentication object from the info recieved form the OAuth endpoint in a map.
     *
     * @param map the map containing authentication info
     * @return the encapsulated data
     */
    @Override
    public final OAuth2Authentication extractAuthentication(final Map<String, ?> map) {
        Map<String, String> parameters = new HashMap<>();
        Set<String> scope = parseScopes(map);
        Authentication user = userTokenConverter.extractAuthentication(map);
        String clientId = (String) map.get(CLIENT_ID);
        parameters.put(CLIENT_ID, clientId);
        Set<String> resourceIds;
        if (map.containsKey(AUD)) {
            resourceIds = new LinkedHashSet<>((Collection<String>) map.get(AUD));
        } else {
            resourceIds = new LinkedHashSet<>(Collections.<String>emptySet());
        }
        OAuth2Request request = new OAuth2Request(parameters, clientId, null, true, scope, resourceIds, null, null,
                null);

        return new OAuth2Authentication(request, user);
    }

    private Set<String> parseScopes(final Map<String, ?> map) {
        // Parsing of scopes coming back from Google are slightly different from the default implementation
        // Instead of it being a collection it is a String where multiple scopes are separated by a space.
        Object scopeAsObject = map.containsKey(SCOPE) ? map.get(SCOPE) : "";
        Set<String> scope = new LinkedHashSet<>();

        if (String.class.isAssignableFrom(scopeAsObject.getClass())) {
            String scopeAsString = (String) scopeAsObject;
            Collections.addAll(scope, scopeAsString.split(" "));

        } else if (Collection.class.isAssignableFrom(scopeAsObject.getClass())) {
            Collection<String> scopes = (Collection<String>) scopeAsObject;
            scope.addAll(scopes);
        }
        return scope;
    }
}