org.springframework.boot.actuate.autoconfigure.cloudfoundry.reactive.CloudFoundrySecurityInterceptor Maven / Gradle / Ivy
/*
* Copyright 2012-2023 the original author or authors.
*
* 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
*
* https://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.springframework.boot.actuate.autoconfigure.cloudfoundry.reactive;
import java.util.Locale;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import reactor.core.publisher.Mono;
import org.springframework.boot.actuate.autoconfigure.cloudfoundry.CloudFoundryAuthorizationException;
import org.springframework.boot.actuate.autoconfigure.cloudfoundry.CloudFoundryAuthorizationException.Reason;
import org.springframework.boot.actuate.autoconfigure.cloudfoundry.SecurityResponse;
import org.springframework.boot.actuate.autoconfigure.cloudfoundry.Token;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.StringUtils;
import org.springframework.web.cors.reactive.CorsUtils;
import org.springframework.web.server.ServerWebExchange;
/**
* Security interceptor to validate the cloud foundry token.
*
* @author Madhura Bhave
*/
class CloudFoundrySecurityInterceptor {
private static final Log logger = LogFactory.getLog(CloudFoundrySecurityInterceptor.class);
private final ReactiveTokenValidator tokenValidator;
private final ReactiveCloudFoundrySecurityService cloudFoundrySecurityService;
private final String applicationId;
private static final Mono SUCCESS = Mono.just(SecurityResponse.success());
CloudFoundrySecurityInterceptor(ReactiveTokenValidator tokenValidator,
ReactiveCloudFoundrySecurityService cloudFoundrySecurityService, String applicationId) {
this.tokenValidator = tokenValidator;
this.cloudFoundrySecurityService = cloudFoundrySecurityService;
this.applicationId = applicationId;
}
Mono preHandle(ServerWebExchange exchange, String id) {
ServerHttpRequest request = exchange.getRequest();
if (CorsUtils.isPreFlightRequest(request)) {
return SUCCESS;
}
if (!StringUtils.hasText(this.applicationId)) {
return Mono.error(new CloudFoundryAuthorizationException(Reason.SERVICE_UNAVAILABLE,
"Application id is not available"));
}
if (this.cloudFoundrySecurityService == null) {
return Mono.error(new CloudFoundryAuthorizationException(Reason.SERVICE_UNAVAILABLE,
"Cloud controller URL is not available"));
}
return check(exchange, id).then(SUCCESS).doOnError(this::logError).onErrorResume(this::getErrorResponse);
}
private void logError(Throwable ex) {
logger.error(ex.getMessage(), ex);
}
private Mono check(ServerWebExchange exchange, String id) {
try {
Token token = getToken(exchange.getRequest());
return this.tokenValidator.validate(token)
.then(this.cloudFoundrySecurityService.getAccessLevel(token.toString(), this.applicationId))
.filter((accessLevel) -> accessLevel.isAccessAllowed(id))
.switchIfEmpty(
Mono.error(new CloudFoundryAuthorizationException(Reason.ACCESS_DENIED, "Access denied")))
.doOnSuccess((accessLevel) -> exchange.getAttributes().put("cloudFoundryAccessLevel", accessLevel))
.then();
}
catch (CloudFoundryAuthorizationException ex) {
return Mono.error(ex);
}
}
private Mono getErrorResponse(Throwable throwable) {
if (throwable instanceof CloudFoundryAuthorizationException cfException) {
return Mono.just(new SecurityResponse(cfException.getStatusCode(),
"{\"security_error\":\"" + cfException.getMessage() + "\"}"));
}
return Mono.just(new SecurityResponse(HttpStatus.INTERNAL_SERVER_ERROR, throwable.getMessage()));
}
private Token getToken(ServerHttpRequest request) {
String authorization = request.getHeaders().getFirst("Authorization");
String bearerPrefix = "bearer ";
if (authorization == null || !authorization.toLowerCase(Locale.ENGLISH).startsWith(bearerPrefix)) {
throw new CloudFoundryAuthorizationException(Reason.MISSING_AUTHORIZATION,
"Authorization header is missing or invalid");
}
return new Token(authorization.substring(bearerPrefix.length()));
}
}