| /* |
| * 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.nifi.registry.security.authorization.resource; |
| |
| import org.apache.nifi.registry.security.authorization.AuthorizationResult; |
| import org.apache.nifi.registry.security.authorization.Authorizer; |
| import org.apache.nifi.registry.security.authorization.RequestAction; |
| import org.apache.nifi.registry.security.authorization.Resource; |
| import org.apache.nifi.registry.security.authorization.UntrustedProxyException; |
| import org.apache.nifi.registry.security.authorization.exception.AccessDeniedException; |
| import org.apache.nifi.registry.security.authorization.user.NiFiUser; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.function.BiFunction; |
| |
| /** |
| * Authorizable that wraps another Authorizable and applies logic for authorizing the proxy chain, unless the resource |
| * allows public access, which then skips authorizing the proxy chain. |
| */ |
| public class ProxyChainAuthorizable implements Authorizable { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(ProxyChainAuthorizable.class); |
| |
| private final Authorizable wrappedAuthorizable; |
| private final Authorizable proxyAuthorizable; |
| private final BiFunction<Resource,RequestAction,Boolean> publicResourceCheck; |
| |
| public ProxyChainAuthorizable(final Authorizable wrappedAuthorizable, |
| final Authorizable proxyAuthorizable, |
| final BiFunction<Resource,RequestAction,Boolean> publicResourceCheck) { |
| this.wrappedAuthorizable = Objects.requireNonNull(wrappedAuthorizable); |
| this.proxyAuthorizable = Objects.requireNonNull(proxyAuthorizable); |
| this.publicResourceCheck = Objects.requireNonNull(publicResourceCheck); |
| } |
| |
| @Override |
| public Authorizable getParentAuthorizable() { |
| if (wrappedAuthorizable.getParentAuthorizable() == null) { |
| return null; |
| } else { |
| final Authorizable parentAuthorizable = wrappedAuthorizable.getParentAuthorizable(); |
| return new ProxyChainAuthorizable(parentAuthorizable, proxyAuthorizable, publicResourceCheck); |
| } |
| } |
| |
| @Override |
| public Resource getResource() { |
| return wrappedAuthorizable.getResource(); |
| } |
| |
| @Override |
| public AuthorizationResult checkAuthorization(final Authorizer authorizer, final RequestAction action, final NiFiUser user, |
| final Map<String, String> resourceContext) { |
| final Resource requestResource = wrappedAuthorizable.getRequestedResource(); |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Requested resource is {}", new Object[]{requestResource.getIdentifier()}); |
| } |
| |
| // if public access is allowed then we want to skip proxy authorization so just return |
| final Boolean isPublicAccessAllowed = publicResourceCheck.apply(requestResource, action); |
| if (isPublicAccessAllowed) { |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Proxy chain will not be checked, public access is allowed for {} on {}", |
| new Object[]{action.toString(), requestResource.getIdentifier()}); |
| } |
| return AuthorizationResult.approved(); |
| } |
| |
| // otherwise public access is not allowed so check the proxy chain for the given action |
| NiFiUser proxyUser = user.getChain(); |
| while (proxyUser != null) { |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Checking proxy [{}] for {}", new Object[]{proxyUser, action}); |
| } |
| |
| // if the proxy is denied then break out of the loop and return a denied result |
| final AuthorizationResult proxyAuthorizationResult = proxyAuthorizable.checkAuthorization(authorizer, action, proxyUser); |
| if (proxyAuthorizationResult.getResult() == AuthorizationResult.Result.Denied) { |
| final String deniedMessage = String.format("Untrusted proxy [%s] for %s operation.", proxyUser.getIdentity(), action.toString()); |
| return AuthorizationResult.denied(deniedMessage); |
| } |
| |
| proxyUser = proxyUser.getChain(); |
| } |
| |
| // at this point the proxy chain was approved so continue to check the original Authorizable |
| return wrappedAuthorizable.checkAuthorization(authorizer, action, user, resourceContext); |
| } |
| |
| @Override |
| public void authorize(final Authorizer authorizer, final RequestAction action, final NiFiUser user, |
| final Map<String, String> resourceContext) throws AccessDeniedException { |
| final Resource requestResource = wrappedAuthorizable.getRequestedResource(); |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Requested resource is {}", new Object[]{requestResource.getIdentifier()}); |
| } |
| |
| // if public access is allowed then we want to skip proxy authorization so just return |
| final Boolean isPublicAccessAllowed = publicResourceCheck.apply(requestResource, action); |
| if (isPublicAccessAllowed) { |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Proxy chain will not be authorized, public access is allowed for {} on {}", |
| new Object[]{action.toString(), requestResource.getIdentifier()}); |
| } |
| return; |
| } |
| |
| // otherwise public access is not allowed so authorize proxy chain for the given action |
| NiFiUser proxyUser = user.getChain(); |
| while (proxyUser != null) { |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Authorizing proxy [{}] for {}", new Object[]{proxyUser, action}); |
| } |
| |
| try { |
| proxyAuthorizable.authorize(authorizer, action, proxyUser); |
| } catch (final AccessDeniedException e) { |
| final String actionString = action.toString(); |
| throw new UntrustedProxyException(String.format("Untrusted proxy [%s] for %s operation.", proxyUser.getIdentity(), actionString)); |
| } |
| proxyUser = proxyUser.getChain(); |
| } |
| |
| // at this point the proxy chain was authorized so continue to authorize the original Authorizable |
| wrappedAuthorizable.authorize(authorizer, action, user, resourceContext); |
| } |
| |
| } |