Files
SCM-Manager/scm-webapp/src/main/java/sonia/scm/security/XsrfAccessTokenValidator.java
Sebastian Sdorra 1cade825af enable xrfs protection only on write request
This change is required in order to fix the image viewer and download of editor plugin
2020-01-14 13:28:17 +01:00

84 lines
3.1 KiB
Java

/**
* Copyright (c) 2014, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.security;
import com.google.common.collect.ImmutableSet;
import sonia.scm.plugin.Extension;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.servlet.http.HttpServletRequest;
import java.util.Locale;
import java.util.Optional;
import java.util.Set;
/**
* Validates xsrf protected access tokens. The validator check if the current request contains an xsrf key which is
* equal to the one in the access token. If the token does not contain a xsrf key, the check is passed by. The xsrf keys
* are added by the {@link XsrfAccessTokenEnricher}.
*
* @author Sebastian Sdorra
* @since 2.0.0
*/
@Extension
public class XsrfAccessTokenValidator implements AccessTokenValidator {
private static final Set<String> ALLOWED_METHOD = ImmutableSet.of(
"GET", "HEAD", "OPTIONS"
);
private final Provider<HttpServletRequest> requestProvider;
/**
* Constructs a new instance.
*
* @param requestProvider http request provider
*/
@Inject
public XsrfAccessTokenValidator(Provider<HttpServletRequest> requestProvider) {
this.requestProvider = requestProvider;
}
@Override
public boolean validate(AccessToken accessToken) {
Optional<String> xsrfClaim = accessToken.getCustom(Xsrf.TOKEN_KEY);
if (xsrfClaim.isPresent()) {
HttpServletRequest request = requestProvider.get();
String xsrfHeaderValue = request.getHeader(Xsrf.HEADER_KEY);
return ALLOWED_METHOD.contains(request.getMethod().toUpperCase(Locale.ENGLISH))
|| xsrfClaim.get().equals(xsrfHeaderValue);
}
return true;
}
}