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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cxf.rs.security.oauth2.services;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;
import javax.servlet.http.HttpSession;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.rs.security.oauth2.common.Client;
import org.apache.cxf.rs.security.oauth2.common.OAuthAuthorizationData;
import org.apache.cxf.rs.security.oauth2.common.OAuthPermission;
import org.apache.cxf.rs.security.oauth2.common.ServerAccessToken;
import org.apache.cxf.rs.security.oauth2.common.UserSubject;
import org.apache.cxf.rs.security.oauth2.provider.OAuthServiceException;
import org.apache.cxf.rs.security.oauth2.provider.SessionAuthenticityTokenProvider;
import org.apache.cxf.rs.security.oauth2.provider.SubjectCreator;
import org.apache.cxf.rs.security.oauth2.utils.OAuthConstants;
import org.apache.cxf.rs.security.oauth2.utils.OAuthUtils;
import org.apache.cxf.security.SecurityContext;
/**
* The Base Redirection-Based Grant Service
*/
public abstract class RedirectionBasedGrantService extends AbstractOAuthService {
private String supportedResponseType;
private String supportedGrantType;
private boolean isClientConfidential;
private SessionAuthenticityTokenProvider sessionAuthenticityTokenProvider;
private SubjectCreator subjectCreator;
protected RedirectionBasedGrantService(String supportedResponseType,
String supportedGrantType,
boolean isConfidential) {
this.supportedResponseType = supportedResponseType;
this.supportedGrantType = supportedGrantType;
this.isClientConfidential = isConfidential;
}
/**
* Handles the initial authorization request by preparing
* the authorization challenge data and returning it to the user.
* Typically the data are expected to be presented in the HTML form
* @return the authorization data
*/
@GET
@Produces({"application/xhtml+xml", "text/html", "application/xml", "application/json" })
public Response authorize() {
MultivaluedMap params = getQueryParameters();
return startAuthorization(params);
}
/**
* Processes the end user decision
* @return The grant value, authorization code or the token
*/
@GET
@Path("/decision")
public Response authorizeDecision() {
MultivaluedMap params = getQueryParameters();
return completeAuthorization(params);
}
/**
* Processes the end user decision
* @return The grant value, authorization code or the token
*/
@POST
@Path("/decision")
@Consumes("application/x-www-form-urlencoded")
public Response authorizeDecisionForm(MultivaluedMap params) {
return completeAuthorization(params);
}
/**
* Starts the authorization process
*/
protected Response startAuthorization(MultivaluedMap params) {
// Make sure the end user has authenticated, check if HTTPS is used
SecurityContext sc = getAndValidateSecurityContext();
Client client = getClient(params);
// Validate the provided request URI, if any, against the ones Client provided
// during the registration
String redirectUri = validateRedirectUri(client, params.getFirst(OAuthConstants.REDIRECT_URI));
// Enforce the client confidentiality requirements
if (!OAuthUtils.isGrantSupportedForClient(client, isClientConfidential, supportedGrantType)) {
return createErrorResponse(params, redirectUri, OAuthConstants.UNAUTHORIZED_CLIENT);
}
// Check response_type
String responseType = params.getFirst(OAuthConstants.RESPONSE_TYPE);
if (responseType == null || !responseType.equals(supportedResponseType)) {
return createErrorResponse(params, redirectUri, OAuthConstants.UNSUPPORTED_RESPONSE_TYPE);
}
// Get the requested scopes
List requestedScope = OAuthUtils.parseScope(params.getFirst(OAuthConstants.SCOPE));
// Create a UserSubject representing the end user
UserSubject userSubject = createUserSubject(sc);
// Request a new grant only if no pre-authorized token is available
ServerAccessToken preauthorizedToken = getDataProvider().getPreauthorizedToken(
client, requestedScope, userSubject, supportedGrantType);
if (preauthorizedToken != null) {
return createGrant(params,
client,
redirectUri,
requestedScope,
Collections.emptyList(),
userSubject,
preauthorizedToken);
}
// Convert the requested scopes to OAuthPermission instances
List permissions = null;
try {
permissions = getDataProvider().convertScopeToPermissions(client, requestedScope);
} catch (OAuthServiceException ex) {
return createErrorResponse(params, redirectUri, OAuthConstants.INVALID_SCOPE);
}
// Return the authorization challenge data to the end user
OAuthAuthorizationData data =
createAuthorizationData(client, params, permissions);
return Response.ok(data).build();
}
/**
* Create the authorization challenge data
*/
protected OAuthAuthorizationData createAuthorizationData(
Client client, MultivaluedMap params, List perms) {
OAuthAuthorizationData secData = new OAuthAuthorizationData();
addAuthenticityTokenToSession(secData);
secData.setPermissions(perms);
secData.setProposedScope(OAuthUtils.convertPermissionsToScope(perms));
secData.setClientId(client.getClientId());
secData.setRedirectUri(params.getFirst(OAuthConstants.REDIRECT_URI));
secData.setState(params.getFirst(OAuthConstants.STATE));
secData.setApplicationName(client.getApplicationName());
secData.setApplicationWebUri(client.getApplicationWebUri());
secData.setApplicationDescription(client.getApplicationDescription());
secData.setApplicationLogoUri(client.getApplicationLogoUri());
String replyTo = getMessageContext().getUriInfo()
.getAbsolutePathBuilder().path("decision").build().toString();
secData.setReplyTo(replyTo);
return secData;
}
/**
* Completes the authorization process
*/
protected Response completeAuthorization(MultivaluedMap params) {
// Make sure the end user has authenticated, check if HTTPS is used
SecurityContext securityContext = getAndValidateSecurityContext();
// Make sure the session is valid
if (!compareRequestAndSessionTokens(params.getFirst(OAuthConstants.SESSION_AUTHENTICITY_TOKEN))) {
throw new WebApplicationException(400);
}
//TODO: additionally we can check that the Principal that got authenticated
// in startAuthorization is the same that got authenticated in completeAuthorization
Client client = getClient(params);
String redirectUri = validateRedirectUri(client, params.getFirst(OAuthConstants.REDIRECT_URI));
// Get the end user decision value
String decision = params.getFirst(OAuthConstants.AUTHORIZATION_DECISION_KEY);
boolean allow = OAuthConstants.AUTHORIZATION_DECISION_ALLOW.equals(decision);
// Return the error if denied
if (!allow) {
return createErrorResponse(params, redirectUri, OAuthConstants.ACCESS_DENIED);
}
// Check if the end user may have had a chance to down-scope the requested scopes
List requestedScope = OAuthUtils.parseScope(params.getFirst(OAuthConstants.SCOPE));
List approvedScope = new LinkedList();
for (String rScope : requestedScope) {
String param = params.getFirst(rScope + "_status");
if (param != null && OAuthConstants.AUTHORIZATION_DECISION_ALLOW.equals(param)) {
approvedScope.add(rScope);
}
}
if (!requestedScope.containsAll(approvedScope)) {
return createErrorResponse(params, redirectUri, OAuthConstants.INVALID_SCOPE);
}
UserSubject userSubject = createUserSubject(securityContext);
// Request a new grant
return createGrant(params,
client,
redirectUri,
requestedScope,
approvedScope,
userSubject,
null);
}
public void setSessionAuthenticityTokenProvider(SessionAuthenticityTokenProvider sessionAuthenticityTokenProvider) {
this.sessionAuthenticityTokenProvider = sessionAuthenticityTokenProvider;
}
public void setSubjectCreator(SubjectCreator creator) {
this.subjectCreator = creator;
}
protected UserSubject createUserSubject(SecurityContext securityContext) {
UserSubject subject = null;
if (subjectCreator != null) {
subject = subjectCreator.createUserSubject(getMessageContext());
if (subject != null) {
return subject;
}
}
subject = getMessageContext().getContent(UserSubject.class);
if (subject != null) {
return subject;
} else {
return OAuthUtils.createSubject(securityContext);
}
}
protected abstract Response createErrorResponse(MultivaluedMap params,
String redirectUri,
String error);
protected abstract Response createGrant(MultivaluedMap params,
Client client,
String redirectUri,
List requestedScope,
List approvedScope,
UserSubject userSubject,
ServerAccessToken preAuthorizedToken);
private SecurityContext getAndValidateSecurityContext() {
SecurityContext securityContext =
(SecurityContext)getMessageContext().get(SecurityContext.class.getName());
if (securityContext == null || securityContext.getUserPrincipal() == null) {
throw new WebApplicationException(401);
}
checkTransportSecurity();
return securityContext;
}
protected String validateRedirectUri(Client client, String redirectUri) {
List uris = client.getRedirectUris();
if (redirectUri != null) {
String webUri = client.getApplicationWebUri();
if (uris.size() > 0 && !uris.contains(redirectUri)
|| webUri != null && !redirectUri.startsWith(webUri)) {
redirectUri = null;
}
} else if (uris.size() == 1) {
redirectUri = uris.get(0);
}
if (redirectUri == null) {
reportInvalidRequestError("Client Redirect Uri is invalid");
}
return redirectUri;
}
private void addAuthenticityTokenToSession(OAuthAuthorizationData secData) {
final String sessionToken;
if (this.sessionAuthenticityTokenProvider != null) {
sessionToken = this.sessionAuthenticityTokenProvider.createSessionToken(getMessageContext());
} else {
HttpSession session = getMessageContext().getHttpServletRequest().getSession();
sessionToken = UUID.randomUUID().toString();
session.setAttribute(OAuthConstants.SESSION_AUTHENTICITY_TOKEN, sessionToken);
}
secData.setAuthenticityToken(sessionToken);
}
private boolean compareRequestAndSessionTokens(String requestToken) {
final String sessionToken;
if (this.sessionAuthenticityTokenProvider != null) {
sessionToken = sessionAuthenticityTokenProvider.removeSessionToken(getMessageContext());
} else {
HttpSession session = getMessageContext().getHttpServletRequest().getSession();
sessionToken = (String)session.getAttribute(OAuthConstants.SESSION_AUTHENTICITY_TOKEN);
if (sessionToken != null) {
session.removeAttribute(OAuthConstants.SESSION_AUTHENTICITY_TOKEN);
}
}
if (StringUtils.isEmpty(sessionToken)) {
return false;
} else {
return requestToken.equals(sessionToken);
}
}
}
