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CSRFProtector.java
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package act.security;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.Act;
import act.app.ActionContext;
import act.app.App;
import act.crypto.AppCrypto;
import org.osgl.http.H;
import org.osgl.util.S;
public interface CSRFProtector {
boolean verifyToken(String token, H.Session session, App app);
String retrieveToken(H.Session session, String cookieName, App app);
String generateToken(H.Session session, App app);
void clearExistingToken(H.Session session, String cookieName);
void outputToken(String token, String cookieName, String cookieDomain, ActionContext context);
enum Predefined implements CSRFProtector {
HMAC() {
@Override
public boolean verifyToken(String token, H.Session session, App app) {
return S.eq(Act.app().decrypt(token), generateToken(session, app));
}
@Override
public String retrieveToken(H.Session session, String cookieName, App app) {
return null;
}
@Override
public void clearExistingToken(H.Session session, String cookieName) {}
@Override
public String generateToken(H.Session session, App app) {
String id = session.id();
String username = session.get(app.config().sessionKeyUsername());
String payload = S.concat(id, username);
String sign = app.sign(payload);
return S.concat(payload, "-", sign);
}
@Override
public void outputToken(String token, String cookieName, String cookieDomain, ActionContext context) {
}
},
RANDOM() {
@Override
public boolean verifyToken(String token, H.Session session, App app) {
String tokenInSession = session.get(app.config().csrfCookieName());
if (S.eq(token, tokenInSession)) {
return true;
}
AppCrypto crypto = Act.crypto();
return S.eq(crypto.decrypt(token), crypto.decrypt(tokenInSession));
}
@Override
public String retrieveToken(H.Session session, String cookieName, App app) {
return session.get(cookieName);
}
@Override
public void clearExistingToken(H.Session session, String cookieName) {
session.remove(cookieName);
}
@Override
public String generateToken(H.Session session, App app) {
return String.valueOf(Act.crypto().generateRandomInt());
}
@Override
public void outputToken(String token, String cookieName, String cookieDomain, ActionContext context) {
context.session().put(cookieName, token);
}
};
public static CSRFProtector valueOfIgnoreCase(String s) {
if (S.eq(HMAC.name(), s.toUpperCase())) {
return HMAC;
} else if (S.eq(RANDOM.name(), s.toUpperCase())) {
return RANDOM;
}
return null;
}
}
}