ocket8888 commented on a change in pull request #3534: TP Delivery Service Generate SSL update, new letsencrypt generate and… URL: https://github.com/apache/trafficcontrol/pull/3534#discussion_r334644040
########## File path: traffic_router/core/src/main/java/com/comcast/cdn/traffic_control/traffic_router/core/ds/LetsEncryptDnsChallengeWatcher.java ########## @@ -0,0 +1,173 @@ +package com.comcast.cdn.traffic_control.traffic_router.core.ds; + +/* + * + * 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 + * + * 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. + */ + +import com.comcast.cdn.traffic_control.traffic_router.core.config.ConfigHandler; +import com.comcast.cdn.traffic_control.traffic_router.core.util.AbstractResourceWatcher; +import com.comcast.cdn.traffic_control.traffic_router.core.util.JsonUtils; +import com.comcast.cdn.traffic_control.traffic_router.core.util.JsonUtilsException; +import com.fasterxml.jackson.core.JsonFactory; +import com.fasterxml.jackson.core.JsonParseException; +import com.fasterxml.jackson.core.type.TypeReference; +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.databind.node.ArrayNode; +import com.fasterxml.jackson.databind.node.ObjectNode; +import org.apache.log4j.Logger; + +import java.io.*; +import java.time.Instant; +import java.util.HashMap; +import java.util.List; + +public class LetsEncryptDnsChallengeWatcher extends AbstractResourceWatcher { + private static final Logger LOGGER = Logger.getLogger(LetsEncryptDnsChallengeWatcher.class); + public static final String DEFAULT_LE_DNS_CHALLENGE_URL = "https://${toHostname}/api/1.4/letsencrypt/dnsrecords/";; + private static final String configFile = "/opt/traffic_router/db/cr-config.json"; + + private ConfigHandler configHandler; + + public void setConfigHandler(final ConfigHandler configHandler) { + this.configHandler = configHandler; + } + + public LetsEncryptDnsChallengeWatcher() { + setDatabaseUrl(DEFAULT_LE_DNS_CHALLENGE_URL); + } + + @Override + @SuppressWarnings("PMD.CyclomaticComplexity") + public boolean useData(final String data) { + try { + final ObjectMapper mapper = new ObjectMapper(new JsonFactory()); + final HashMap<String, List<LetsEncryptDnsChallenge>> dataMap = mapper.readValue(data, new TypeReference<HashMap<String, List<LetsEncryptDnsChallenge>>>() { }); + final List<LetsEncryptDnsChallenge> challengeList = dataMap.get("response"); + + final JsonNode mostRecentConfig = mapper.readTree(readConfigFile()); + final ObjectNode deliveryServicesNode = (ObjectNode) JsonUtils.getJsonNode(mostRecentConfig, ConfigHandler.deliveryServicesKey); + + + challengeList.forEach(challenge -> { + final StringBuilder sb = new StringBuilder(); + sb.append(challenge.getFqdn()); + if (!challenge.getFqdn().endsWith(".")) { + sb.append('.'); + } + final String challengeDomain = sb.toString(); + final String fqdn = challengeDomain.substring(0, challengeDomain.length() - 1).replace("_acme-challenge.", ""); + + ObjectNode deliveryServiceConfig = null; + String dsLabel = ""; + final StringBuilder nameSb = new StringBuilder(); + nameSb.append("_acme-challenge"); + for (final String label : fqdn.split("\\.")) { + deliveryServiceConfig = (ObjectNode) deliveryServicesNode.get(label); + if (deliveryServiceConfig != null) { + dsLabel = label; + break; + } else { + nameSb.append('.'); + nameSb.append(label); + } + } + + ArrayNode staticDnsEntriesNode; + + if (deliveryServiceConfig.findValue("staticDnsEntries") != null) { + staticDnsEntriesNode = (ArrayNode) deliveryServiceConfig.findValue("staticDnsEntries"); + } else { + staticDnsEntriesNode = mapper.createArrayNode(); + } + + if (challenge.getRecord().isEmpty()) { + for (int i = 0; i < staticDnsEntriesNode.size(); i++) { + if (staticDnsEntriesNode.get(i).get("name").equals("_acme-challenge")) { + staticDnsEntriesNode.remove(i); + } + } + } else { + + final ObjectNode newChildNode = mapper.createObjectNode(); + newChildNode.put("type", "TXT"); + newChildNode.put("name", nameSb.toString()); + newChildNode.put("value", challenge.getRecord()); + newChildNode.put("ttl", 10); + + staticDnsEntriesNode.add(newChildNode); + } + + deliveryServiceConfig.set("staticDnsEntries", staticDnsEntriesNode); + deliveryServicesNode.set(dsLabel, deliveryServiceConfig); + + }); + + final ObjectNode statsNode = (ObjectNode) mostRecentConfig.get("stats"); + statsNode.put("date", Instant.now().toEpochMilli() / 1000L); + + final ObjectNode fullConfig = (ObjectNode) mostRecentConfig; + fullConfig.set(ConfigHandler.deliveryServicesKey, deliveryServicesNode); + fullConfig.set("stats", statsNode); + + try { + configHandler.processConfig(fullConfig.toString()); + } catch (JsonParseException | JsonUtilsException jsonError) { + LOGGER.error("error processing config: " + jsonError.getMessage()); + } + + return true; + } catch (Exception e) { + LOGGER.warn("Failed updating dns challenge txt record with data from " + dataBaseURL + ": " + e.getMessage()); + } + + return false; + } + + @Override + protected boolean verifyData(final String data) { + try { + final ObjectMapper mapper = new ObjectMapper(new JsonFactory()); + mapper.readValue(data, new TypeReference<HashMap<String, List<LetsEncryptDnsChallenge>>>() { }); + return true; + } catch (Exception e) { + LOGGER.warn("Failed to build dns challenge data while verifying"); + } + + return false; + } + + @Override + public String getWatcherConfigPrefix() { + return "dnschallengemapping"; + } + + @SuppressWarnings("PMD.AppendCharacterWithChar") Review comment: This is a simple enough fix, just use single-quotes. 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