/*******************************************************************************
* Copyright 2014 The MITRE Corporation
* and the MIT Kerberos and Internet Trust Consortium
*
* 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.mitre.oauth2.token;
import java.util.HashSet;
import java.util.Set;
import org.mitre.oauth2.model.OAuth2AccessTokenEntity;
import org.mitre.oauth2.service.ClientDetailsEntityService;
import org.mitre.oauth2.service.OAuth2TokenEntityService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.oauth2.common.exceptions.InvalidScopeException;
import org.springframework.security.oauth2.common.exceptions.InvalidTokenException;
import org.springframework.security.oauth2.provider.ClientDetails;
import org.springframework.security.oauth2.provider.OAuth2Authentication;
import org.springframework.security.oauth2.provider.OAuth2RequestFactory;
import org.springframework.security.oauth2.provider.TokenRequest;
import org.springframework.security.oauth2.provider.token.AbstractTokenGranter;
import org.springframework.stereotype.Component;
import com.google.common.collect.Sets;
/**
* @author jricher
*
*/
@Component("chainedTokenGranter")
public class ChainedTokenGranter extends AbstractTokenGranter {
private static final String grantType = "urn:ietf:params:oauth:grant_type:redelegate";
// keep down-cast versions so we can get to the right queries
private OAuth2TokenEntityService tokenServices;
/**
* @param tokenServices
* @param clientDetailsService
* @param grantType
*/
@Autowired
public ChainedTokenGranter(OAuth2TokenEntityService tokenServices, ClientDetailsEntityService clientDetailsService, OAuth2RequestFactory requestFactory) {
super(tokenServices, clientDetailsService, requestFactory, grantType);
this.tokenServices = tokenServices;
}
/* (non-Javadoc)
* @see org.springframework.security.oauth2.provider.token.AbstractTokenGranter#getOAuth2Authentication(org.springframework.security.oauth2.provider.AuthorizationRequest)
*/
@Override
protected OAuth2Authentication getOAuth2Authentication(ClientDetails client, TokenRequest tokenRequest) throws AuthenticationException, InvalidTokenException {
// read and load up the existing token
String incomingTokenValue = tokenRequest.getRequestParameters().get("token");
OAuth2AccessTokenEntity incomingToken = tokenServices.readAccessToken(incomingTokenValue);
// check for scoping in the request, can't up-scope with a chained request
Set<String> approvedScopes = incomingToken.getScope();
Set<String> requestedScopes = tokenRequest.getScope();
if (requestedScopes == null) {
requestedScopes = new HashSet<String>();
}
// do a check on the requested scopes -- if they exactly match the client scopes, they were probably shadowed by the token granter
if (client.getScope().equals(requestedScopes)) {
requestedScopes = new HashSet<String>();
}
// if our scopes are a valid subset of what's allowed, we can continue
if (approvedScopes.containsAll(requestedScopes)) {
if (requestedScopes.isEmpty()) {
// if there are no scopes, inherit the original scopes from the token
tokenRequest.setScope(approvedScopes);
} else {
// if scopes were asked for, give only the subset of scopes requested
// this allows safe downscoping
tokenRequest.setScope(Sets.intersection(requestedScopes, approvedScopes));
}
// NOTE: don't revoke the existing access token
// create a new access token
OAuth2Authentication authentication = new OAuth2Authentication(getRequestFactory().createOAuth2Request(client, tokenRequest), incomingToken.getAuthenticationHolder().getAuthentication().getUserAuthentication());
return authentication;
} else {
throw new InvalidScopeException("Invalid scope requested in chained request", approvedScopes);
}
}
}