| /* |
| * 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.knox.gateway.service.knoxtoken; |
| |
| import java.security.KeyStoreException; |
| import java.security.Principal; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertificateEncodingException; |
| import java.security.cert.X509Certificate; |
| import java.util.ArrayList; |
| import java.util.Map; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Optional; |
| |
| import javax.annotation.PostConstruct; |
| import javax.inject.Singleton; |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.POST; |
| import javax.ws.rs.Path; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.Response; |
| |
| import org.apache.commons.codec.binary.Base64; |
| import org.apache.knox.gateway.i18n.messages.MessagesFactory; |
| import org.apache.knox.gateway.security.SubjectUtils; |
| import org.apache.knox.gateway.services.ServiceType; |
| import org.apache.knox.gateway.services.GatewayServices; |
| import org.apache.knox.gateway.services.security.KeystoreService; |
| import org.apache.knox.gateway.services.security.KeystoreServiceException; |
| import org.apache.knox.gateway.services.security.token.JWTokenAuthority; |
| import org.apache.knox.gateway.services.security.token.TokenServiceException; |
| import org.apache.knox.gateway.services.security.token.TokenStateService; |
| import org.apache.knox.gateway.services.security.token.impl.JWT; |
| import org.apache.knox.gateway.util.JsonUtils; |
| |
| import static javax.ws.rs.core.MediaType.APPLICATION_JSON; |
| import static javax.ws.rs.core.MediaType.APPLICATION_XML; |
| |
| @Singleton |
| @Path(TokenResource.RESOURCE_PATH) |
| public class TokenResource { |
| private static final String EXPIRES_IN = "expires_in"; |
| private static final String TOKEN_TYPE = "token_type"; |
| private static final String ACCESS_TOKEN = "access_token"; |
| private static final String TARGET_URL = "target_url"; |
| private static final String ENDPOINT_PUBLIC_CERT = "endpoint_public_cert"; |
| private static final String BEARER = "Bearer"; |
| private static final String TOKEN_TTL_PARAM = "knox.token.ttl"; |
| private static final String TOKEN_AUDIENCES_PARAM = "knox.token.audiences"; |
| private static final String TOKEN_TARGET_URL = "knox.token.target.url"; |
| private static final String TOKEN_CLIENT_DATA = "knox.token.client.data"; |
| private static final String TOKEN_CLIENT_CERT_REQUIRED = "knox.token.client.cert.required"; |
| private static final String TOKEN_ALLOWED_PRINCIPALS = "knox.token.allowed.principals"; |
| private static final String TOKEN_SIG_ALG = "knox.token.sigalg"; |
| private static final String TOKEN_EXP_RENEWAL_INTERVAL = "knox.token.exp.renew-interval"; |
| private static final String TOKEN_EXP_RENEWAL_MAX_LIFETIME = "knox.token.exp.max-lifetime"; |
| private static final String TOKEN_RENEWER_WHITELIST = "knox.token.renewer.whitelist"; |
| private static final long TOKEN_TTL_DEFAULT = 30000L; |
| static final String RESOURCE_PATH = "knoxtoken/api/v1/token"; |
| static final String RENEW_PATH = "/renew"; |
| static final String REVOKE_PATH = "/revoke"; |
| private static final String TARGET_ENDPOINT_PULIC_CERT_PEM = "knox.token.target.endpoint.cert.pem"; |
| private static TokenServiceMessages log = MessagesFactory.get(TokenServiceMessages.class); |
| private long tokenTTL = TOKEN_TTL_DEFAULT; |
| private List<String> targetAudiences = new ArrayList<>(); |
| private String tokenTargetUrl; |
| private Map<String, Object> tokenClientDataMap; |
| private List<String> allowedDNs = new ArrayList<>(); |
| private boolean clientCertRequired; |
| private String signatureAlgorithm = "RS256"; |
| private String endpointPublicCert; |
| |
| // Optional token store service |
| private TokenStateService tokenStateService; |
| |
| private Optional<Long> renewInterval = Optional.empty(); |
| |
| private Optional<Long> maxTokenLifetime = Optional.empty(); |
| |
| private List<String> allowedRenewers; |
| |
| @Context |
| HttpServletRequest request; |
| |
| @Context |
| ServletContext context; |
| |
| @PostConstruct |
| public void init() { |
| |
| String audiences = context.getInitParameter(TOKEN_AUDIENCES_PARAM); |
| if (audiences != null) { |
| String[] auds = audiences.split(","); |
| for (String aud : auds) { |
| targetAudiences.add(aud.trim()); |
| } |
| } |
| |
| String clientCert = context.getInitParameter(TOKEN_CLIENT_CERT_REQUIRED); |
| clientCertRequired = "true".equals(clientCert); |
| |
| String principals = context.getInitParameter(TOKEN_ALLOWED_PRINCIPALS); |
| if (principals != null) { |
| String[] dns = principals.split(";"); |
| for (String dn : dns) { |
| allowedDNs.add(dn.replaceAll("\\s+", "")); |
| } |
| } |
| |
| String ttl = context.getInitParameter(TOKEN_TTL_PARAM); |
| if (ttl != null) { |
| try { |
| tokenTTL = Long.parseLong(ttl); |
| if (tokenTTL < -1 || (tokenTTL + System.currentTimeMillis() < 0)) { |
| log.invalidTokenTTLEncountered(ttl); |
| tokenTTL = TOKEN_TTL_DEFAULT; |
| } |
| } catch (NumberFormatException nfe) { |
| log.invalidTokenTTLEncountered(ttl); |
| } |
| } |
| |
| tokenTargetUrl = context.getInitParameter(TOKEN_TARGET_URL); |
| |
| String clientData = context.getInitParameter(TOKEN_CLIENT_DATA); |
| if (clientData != null) { |
| tokenClientDataMap = new HashMap<>(); |
| String[] tokenClientData = clientData.split(","); |
| addClientDataToMap(tokenClientData, tokenClientDataMap); |
| } |
| |
| String sigAlg = context.getInitParameter(TOKEN_SIG_ALG); |
| if (sigAlg != null) { |
| signatureAlgorithm = sigAlg; |
| } |
| |
| String targetEndpointPublicCert = context.getInitParameter(TARGET_ENDPOINT_PULIC_CERT_PEM); |
| if (targetEndpointPublicCert != null) { |
| endpointPublicCert = targetEndpointPublicCert; |
| } |
| |
| // If server-managed token expiration is configured, set the token store service |
| if (Boolean.valueOf(context.getInitParameter(TokenStateService.CONFIG_SERVER_MANAGED))) { |
| GatewayServices services = (GatewayServices) context.getAttribute(GatewayServices.GATEWAY_SERVICES_ATTRIBUTE); |
| tokenStateService = services.getService(ServiceType.TOKEN_STATE_SERVICE); |
| |
| String renewIntervalValue = context.getInitParameter(TOKEN_EXP_RENEWAL_INTERVAL); |
| if (renewIntervalValue != null && !renewIntervalValue.isEmpty()) { |
| try { |
| renewInterval = Optional.of(Long.parseLong(renewIntervalValue)); |
| } catch (NumberFormatException e) { |
| log.invalidConfigValue(TOKEN_EXP_RENEWAL_INTERVAL, renewIntervalValue, e); |
| } |
| } |
| |
| String maxLifetimeValue = context.getInitParameter(TOKEN_EXP_RENEWAL_MAX_LIFETIME); |
| if (maxLifetimeValue != null && !maxLifetimeValue.isEmpty()) { |
| try { |
| maxTokenLifetime = Optional.of(Long.parseLong(maxLifetimeValue)); |
| } catch (NumberFormatException e) { |
| log.invalidConfigValue(TOKEN_EXP_RENEWAL_MAX_LIFETIME, maxLifetimeValue, e); |
| } |
| } |
| |
| allowedRenewers = new ArrayList<>(); |
| String renewerList = context.getInitParameter(TOKEN_RENEWER_WHITELIST); |
| if (renewerList != null && !renewerList.isEmpty()) { |
| for (String renewer : renewerList.split(",")) { |
| allowedRenewers.add(renewer.trim()); |
| } |
| } |
| } |
| } |
| |
| @GET |
| @Produces({APPLICATION_JSON, APPLICATION_XML}) |
| public Response doGet() { |
| return getAuthenticationToken(); |
| } |
| |
| @POST |
| @Produces({APPLICATION_JSON, APPLICATION_XML}) |
| public Response doPost() { |
| return getAuthenticationToken(); |
| } |
| |
| @POST |
| @Path(RENEW_PATH) |
| @Produces({APPLICATION_JSON}) |
| public Response renew(String token) { |
| Response resp; |
| |
| long expiration = 0; |
| String error = ""; |
| |
| if (tokenStateService == null) { |
| error = "Token renewal support is not configured"; |
| } else { |
| String renewer = SubjectUtils.getCurrentEffectivePrincipalName(); |
| if (allowedRenewers.contains(renewer)) { |
| try { |
| // If renewal fails, it should be an exception |
| expiration = tokenStateService.renewToken(token, |
| renewInterval.orElse(tokenStateService.getDefaultRenewInterval())); |
| } catch (Exception e) { |
| error = e.getMessage(); |
| } |
| } else { |
| error = "Caller (" + renewer + ") not authorized to renew tokens."; |
| } |
| } |
| |
| if(error.isEmpty()) { |
| resp = Response.status(Response.Status.OK) |
| .entity("{\n \"renewed\": \"true\",\n \"expires\": \"" + expiration + "\"\n}\n") |
| .build(); |
| } else { |
| resp = Response.status(Response.Status.BAD_REQUEST) |
| .entity("{\n \"renewed\": \"false\",\n \"error\": \"" + error + "\"\n}\n") |
| .build(); |
| } |
| |
| return resp; |
| } |
| |
| @POST |
| @Path(REVOKE_PATH) |
| @Produces({APPLICATION_JSON}) |
| public Response revoke(String token) { |
| Response resp; |
| |
| String error = ""; |
| |
| if (tokenStateService == null) { |
| error = "Token revocation support is not configured"; |
| } else { |
| String renewer = SubjectUtils.getCurrentEffectivePrincipalName(); |
| if (allowedRenewers.contains(renewer)) { |
| try { |
| tokenStateService.revokeToken(token); |
| } catch (IllegalArgumentException e) { |
| error = e.getMessage(); |
| } |
| } else { |
| error = "Caller (" + renewer + ") not authorized to revoke tokens."; |
| } |
| } |
| |
| if(error.isEmpty()) { |
| resp = Response.status(Response.Status.OK) |
| .entity("{\n \"revoked\": \"true\"\n}\n") |
| .build(); |
| } else { |
| resp = Response.status(Response.Status.BAD_REQUEST) |
| .entity("{\n \"revoked\": \"false\",\n \"error\": \"" + error + "\"\n}\n") |
| .build(); |
| } |
| |
| return resp; |
| } |
| |
| private X509Certificate extractCertificate(HttpServletRequest req) { |
| X509Certificate[] certs = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate"); |
| if (null != certs && certs.length > 0) { |
| return certs[0]; |
| } |
| return null; |
| } |
| |
| private Response getAuthenticationToken() { |
| if (clientCertRequired) { |
| X509Certificate cert = extractCertificate(request); |
| if (cert != null) { |
| if (!allowedDNs.contains(cert.getSubjectDN().getName().replaceAll("\\s+", ""))) { |
| return Response.status(403).entity("{ \"Unable to get token - untrusted client cert.\" }").build(); |
| } |
| } else { |
| return Response.status(403).entity("{ \"Unable to get token - client cert required.\" }").build(); |
| } |
| } |
| GatewayServices services = (GatewayServices) request.getServletContext() |
| .getAttribute(GatewayServices.GATEWAY_SERVICES_ATTRIBUTE); |
| |
| JWTokenAuthority ts = services.getService(ServiceType.TOKEN_SERVICE); |
| Principal p = request.getUserPrincipal(); |
| long expires = getExpiry(); |
| |
| if (endpointPublicCert == null) { |
| // acquire PEM for gateway identity of this gateway instance |
| KeystoreService ks = services.getService(ServiceType.KEYSTORE_SERVICE); |
| if (ks != null) { |
| try { |
| Certificate cert = ks.getCertificateForGateway(); |
| byte[] bytes = cert.getEncoded(); |
| //Base64 encoder = new Base64(76, "\n".getBytes("ASCII")); |
| endpointPublicCert = Base64.encodeBase64String(bytes); |
| } catch (KeyStoreException | KeystoreServiceException | CertificateEncodingException e) { |
| // assuming that certs will be properly provisioned across all clients |
| log.unableToAcquireCertForEndpointClients(e); |
| } |
| } |
| } |
| |
| try { |
| JWT token; |
| if (targetAudiences.isEmpty()) { |
| token = ts.issueToken(p, signatureAlgorithm, expires); |
| } else { |
| token = ts.issueToken(p, targetAudiences, signatureAlgorithm, expires); |
| } |
| |
| if (token != null) { |
| String accessToken = token.toString(); |
| HashMap<String, Object> map = new HashMap<>(); |
| map.put(ACCESS_TOKEN, accessToken); |
| map.put(TOKEN_TYPE, BEARER); |
| map.put(EXPIRES_IN, expires); |
| if (tokenTargetUrl != null) { |
| map.put(TARGET_URL, tokenTargetUrl); |
| } |
| if (tokenClientDataMap != null) { |
| map.putAll(tokenClientDataMap); |
| } |
| if (endpointPublicCert != null) { |
| map.put(ENDPOINT_PUBLIC_CERT, endpointPublicCert); |
| } |
| |
| String jsonResponse = JsonUtils.renderAsJsonString(map); |
| |
| // Optional token store service persistence |
| if (tokenStateService != null) { |
| tokenStateService.addToken(accessToken, |
| System.currentTimeMillis(), |
| expires, |
| maxTokenLifetime.orElse(tokenStateService.getDefaultMaxLifetimeDuration())); |
| } |
| |
| return Response.ok().entity(jsonResponse).build(); |
| } else { |
| return Response.serverError().build(); |
| } |
| } catch (TokenServiceException e) { |
| log.unableToIssueToken(e); |
| } |
| return Response.ok().entity("{ \"Unable to acquire token.\" }").build(); |
| } |
| |
| void addClientDataToMap(String[] tokenClientData, |
| Map<String,Object> map) { |
| String[] kv; |
| for (String tokenClientDatum : tokenClientData) { |
| kv = tokenClientDatum.split("="); |
| if (kv.length == 2) { |
| map.put(kv[0], kv[1]); |
| } |
| } |
| } |
| |
| private long getExpiry() { |
| long expiry; |
| if (tokenTTL == -1) { |
| expiry = -1; |
| } else { |
| expiry = System.currentTimeMillis() + tokenTTL; |
| } |
| return expiry; |
| } |
| } |