Anonymizer.java
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上传日期:2018-01-08
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- /**
- * 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.hadoop.contrib.failmon;
- import java.io.UnsupportedEncodingException;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
- /**********************************************************
- * This class provides anonymization to SerializedRecord objects. It
- * anonymizes all hostnames, ip addresses and file names/paths
- * that appear in EventRecords gathered from the logs
- * and other system utilities. Such values are hashed using a
- * cryptographically safe one-way-hash algorithm (MD5).
- *
- **********************************************************/
- public class Anonymizer {
- /**
- * Anonymize hostnames, ip addresses and file names/paths
- * that appear in fields of a SerializedRecord.
- *
- * @param sr the input SerializedRecord
- *
- * @return the anonymized SerializedRecord
- */
- public static SerializedRecord anonymize(SerializedRecord sr)
- throws Exception {
- String hostname = sr.get("hostname");
- if (hostname == null)
- throw new Exception("Malformed SerializedRecord: no hostname found");
- if ("true".equalsIgnoreCase(Environment
- .getProperty("anonymizer.hash.hostnames"))) {
- // hash the node's hostname
- anonymizeField(sr, "message", hostname, "_hn_");
- anonymizeField(sr, "hostname", hostname, "_hn_");
- // hash all other hostnames
- String suffix = Environment.getProperty("anonymizer.hostname.suffix");
- if (suffix != null)
- anonymizeField(sr, "message", "(\S+\.)*" + suffix, "_hn_");
- }
- if ("true".equalsIgnoreCase(Environment.getProperty("anonymizer.hash.ips"))) {
- // hash all ip addresses
- String ipPattern = "(\d{1,3}\.){3}\d{1,3}";
- anonymizeField(sr, "message", ipPattern, "_ip_");
- anonymizeField(sr, "ips", ipPattern, "_ip_");
- // if multiple ips are present for a node:
- int i = 0;
- while (sr.get("ips" + "#" + i) != null)
- anonymizeField(sr, "ips" + "#" + i++, ipPattern, "_ip_");
- if ("NIC".equalsIgnoreCase(sr.get("type")))
- anonymizeField(sr, "ipAddress", ipPattern, "_ip_");
- }
- if ("true".equalsIgnoreCase(Environment
- .getProperty("anonymizer.hash.filenames"))) {
- // hash every filename present in messages
- anonymizeField(sr, "message", "\s+/(\S+/)*[^:\s]*", " _fn_");
- anonymizeField(sr, "message", "\s+hdfs://(\S+/)*[^:\s]*",
- " hdfs://_fn_");
- }
- return sr;
- }
- /**
- * Anonymize hostnames, ip addresses and file names/paths
- * that appear in fields of an EventRecord, after it gets
- * serialized into a SerializedRecord.
- *
- * @param er the input EventRecord
- *
- * @return the anonymized SerializedRecord
- */
- public static SerializedRecord anonymize(EventRecord er) throws Exception {
- return anonymize(new SerializedRecord(er));
- }
-
- private static String anonymizeField(SerializedRecord sr, String fieldName,
- String pattern, String prefix) {
- String txt = sr.get(fieldName);
- if (txt == null)
- return null;
- else {
- String anon = getMD5Hash(pattern);
- sr.set(fieldName, txt.replaceAll(pattern, (prefix == null ? "" : prefix)
- + anon));
- return txt;
- }
- }
- /**
- * Create the MD5 digest of an input text.
- *
- * @param text the input text
- *
- * @return the hexadecimal representation of the MD5 digest
- */
- public static String getMD5Hash(String text) {
- MessageDigest md;
- byte[] md5hash = new byte[32];
- try {
- md = MessageDigest.getInstance("MD5");
- md.update(text.getBytes("iso-8859-1"), 0, text.length());
- md5hash = md.digest();
- } catch (NoSuchAlgorithmException e) {
- e.printStackTrace();
- } catch (UnsupportedEncodingException e) {
- e.printStackTrace();
- }
- return convertToHex(md5hash);
- }
- private static String convertToHex(byte[] data) {
- StringBuffer buf = new StringBuffer();
- for (int i = 0; i < data.length; i++) {
- int halfbyte = (data[i] >>> 4) & 0x0F;
- int two_halfs = 0;
- do {
- if ((0 <= halfbyte) && (halfbyte <= 9))
- buf.append((char) ('0' + halfbyte));
- else
- buf.append((char) ('a' + (halfbyte - 10)));
- halfbyte = data[i] & 0x0F;
- } while (two_halfs++ < 1);
- }
- return buf.toString();
- }
- }