Java tutorial
/* * 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.web.security.x509; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.ListIterator; import java.util.Map; import org.apache.commons.lang3.StringUtils; import org.apache.nifi.authentication.AuthenticationResponse; import org.apache.nifi.authorization.AuthorizationRequest; import org.apache.nifi.authorization.AuthorizationResult; import org.apache.nifi.authorization.AuthorizationResult.Result; import org.apache.nifi.authorization.Authorizer; import org.apache.nifi.authorization.RequestAction; import org.apache.nifi.authorization.UserContextKeys; import org.apache.nifi.authorization.resource.ResourceFactory; import org.apache.nifi.authorization.user.NiFiUser; import org.apache.nifi.authorization.user.NiFiUserDetails; import org.apache.nifi.authorization.user.StandardNiFiUser; import org.apache.nifi.util.NiFiProperties; import org.apache.nifi.web.security.InvalidAuthenticationException; import org.apache.nifi.web.security.NiFiAuthenticationProvider; import org.apache.nifi.web.security.ProxiedEntitiesUtils; import org.apache.nifi.web.security.UntrustedProxyException; import org.apache.nifi.web.security.token.NiFiAuthenticationToken; import org.springframework.security.core.Authentication; import org.springframework.security.core.AuthenticationException; /** * */ public class X509AuthenticationProvider extends NiFiAuthenticationProvider { private X509IdentityProvider certificateIdentityProvider; private Authorizer authorizer; public X509AuthenticationProvider(final X509IdentityProvider certificateIdentityProvider, final Authorizer authorizer, final NiFiProperties nifiProperties) { super(nifiProperties); this.certificateIdentityProvider = certificateIdentityProvider; this.authorizer = authorizer; } @Override public Authentication authenticate(Authentication authentication) throws AuthenticationException { final X509AuthenticationRequestToken request = (X509AuthenticationRequestToken) authentication; // attempt to authenticate if certificates were found final AuthenticationResponse authenticationResponse; try { authenticationResponse = certificateIdentityProvider.authenticate(request.getCertificates()); } catch (final IllegalArgumentException iae) { throw new InvalidAuthenticationException(iae.getMessage(), iae); } if (StringUtils.isBlank(request.getProxiedEntitiesChain())) { final String mappedIdentity = mapIdentity(authenticationResponse.getIdentity()); return new NiFiAuthenticationToken( new NiFiUserDetails(new StandardNiFiUser(mappedIdentity, request.getClientAddress()))); } else { // build the entire proxy chain if applicable - <end-user><proxy1><proxy2> final List<String> proxyChain = new ArrayList<>( ProxiedEntitiesUtils.tokenizeProxiedEntitiesChain(request.getProxiedEntitiesChain())); proxyChain.add(authenticationResponse.getIdentity()); // add the chain as appropriate to each proxy NiFiUser proxy = null; for (final ListIterator<String> chainIter = proxyChain.listIterator(proxyChain.size()); chainIter .hasPrevious();) { String identity = chainIter.previous(); // determine if the user is anonymous final boolean isAnonymous = StringUtils.isBlank(identity); if (isAnonymous) { identity = StandardNiFiUser.ANONYMOUS_IDENTITY; } else { identity = mapIdentity(identity); } if (chainIter.hasPrevious()) { // authorize this proxy in order to authenticate this user final AuthorizationRequest proxyAuthorizationRequest = new AuthorizationRequest.Builder() .identity(identity).anonymous(isAnonymous).accessAttempt(true) .action(RequestAction.WRITE).resource(ResourceFactory.getProxyResource()) .userContext(proxy == null ? getUserContext(request) : null) // only set the context for the real user .build(); final AuthorizationResult proxyAuthorizationResult = authorizer .authorize(proxyAuthorizationRequest); if (!Result.Approved.equals(proxyAuthorizationResult.getResult())) { throw new UntrustedProxyException(String.format("Untrusted proxy %s", identity)); } } // Only set the client address for user making the request because we don't know the client address of the proxies String clientAddress = (proxy == null) ? request.getClientAddress() : null; proxy = createUser(identity, proxy, clientAddress, isAnonymous); } return new NiFiAuthenticationToken(new NiFiUserDetails(proxy)); } } /** * Returns a regular user populated with the provided values, or if the user should be anonymous, a well-formed instance of the anonymous user with the provided values. * * @param identity the user's identity * @param chain the proxied entities * @param clientAddress the requesting IP address * @param isAnonymous if true, an anonymous user will be returned (identity will be ignored) * @return the populated user */ protected static NiFiUser createUser(String identity, NiFiUser chain, String clientAddress, boolean isAnonymous) { if (isAnonymous) { return StandardNiFiUser.populateAnonymousUser(chain, clientAddress); } else { return new StandardNiFiUser(identity, chain, clientAddress); } } private Map<String, String> getUserContext(final X509AuthenticationRequestToken request) { final Map<String, String> userContext; if (!StringUtils.isBlank(request.getClientAddress())) { userContext = new HashMap<>(); userContext.put(UserContextKeys.CLIENT_ADDRESS.name(), request.getClientAddress()); } else { userContext = null; } return userContext; } @Override public boolean supports(Class<?> authentication) { return X509AuthenticationRequestToken.class.isAssignableFrom(authentication); } }