--- /dev/null
+/**
+ * ============LICENSE_START====================================================
+ * org.onap.ccsdk
+ * ===========================================================================
+ * Copyright (c) 2023 AT&T Intellectual Property. All rights reserved.
+ * ===========================================================================
+ * 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.
+ * ============LICENSE_END====================================================
+ *
+ */
+
+package org.onap.ccsdk.apps.cadi.taf.dos;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import org.onap.ccsdk.apps.cadi.Access;
+import org.onap.ccsdk.apps.cadi.CachedPrincipal;
+import org.onap.ccsdk.apps.cadi.CadiException;
+import org.onap.ccsdk.apps.cadi.CachedPrincipal.Resp;
+import org.onap.ccsdk.apps.cadi.Taf.LifeForm;
+import org.onap.ccsdk.apps.cadi.config.Config;
+import org.onap.ccsdk.apps.cadi.taf.HttpTaf;
+import org.onap.ccsdk.apps.cadi.taf.PuntTafResp;
+import org.onap.ccsdk.apps.cadi.taf.TafResp;
+import org.onap.ccsdk.apps.cadi.taf.TafResp.RESP;
+
+public class DenialOfServiceTaf implements HttpTaf {
+ private static Map<String, Counter> deniedIP=null, deniedID=null;
+ private Access access;
+ private final TafResp puntNotDenied;
+ private static File dosIP, dosID;
+
+ /**
+ *
+ * @param hostname
+ * @param prod
+ * @throws CadiException
+ */
+ public DenialOfServiceTaf(Access access) throws CadiException {
+ puntNotDenied = new PuntTafResp("DenialOfServiceTaf", "This Transaction is not denied");
+ this.access = access;
+ if (dosIP==null || dosID == null) {
+ String dirStr;
+ if ((dirStr = access.getProperty(Config.AAF_DATA_DIR, null))!=null) {
+ dosIP = new File(dirStr+"/dosIP");
+ readIP();
+ dosID = new File(dirStr+"/dosID");
+ readID();
+ }
+ }
+ }
+
+ @Override
+ public TafResp validate(LifeForm reading, HttpServletRequest req, final HttpServletResponse resp) {
+ // Performance, when not needed
+ if (deniedIP != null) {
+ String ip;
+ Counter c = deniedIP.get(ip=req.getRemoteAddr());
+ if (c!=null) {
+ c.inc();
+ return respDenyIP(access,ip);
+ }
+ }
+
+ // Note: Can't process Principal, because this is the first TAF, and no Principal is created.
+ // Other TAFs use "isDenied()" on this Object to validate.
+ return puntNotDenied;
+ }
+
+ @Override
+ public Resp revalidate(CachedPrincipal prin, Object state) {
+ // We always return NOT MINE, because DOS Taf does not ever validate
+ return Resp.NOT_MINE;
+ }
+
+ /*
+ * for use in Other TAFs, before they attempt backend validation of
+ */
+ public static Counter isDeniedID(String identity) {
+ if (deniedID!=null) {
+ return deniedID.get(identity);
+ }
+ return null;
+ }
+
+ /**
+ *
+ */
+ public static Counter isDeniedIP(String ipvX) {
+ if (deniedIP!=null) {
+ return deniedIP.get(ipvX);
+ }
+ return null;
+ }
+
+ /**
+ * Return of "True" means IP has been added.
+ * Return of "False" means IP already added.
+ *
+ * @param ip
+ * @return
+ */
+ public static synchronized boolean denyIP(String ip) {
+ boolean rv = false;
+ if (deniedIP==null) {
+ deniedIP = new HashMap<>();
+ deniedIP.put(ip, new Counter(ip)); // Noted duplicated for minimum time spent
+ rv= true;
+ } else if (deniedIP.get(ip)==null) {
+ deniedIP.put(ip, new Counter(ip));
+ rv = true;
+ }
+ if (rv) {
+ writeIP();
+ }
+ return rv;
+ }
+
+ private static void writeIP() {
+ if (dosIP!=null && deniedIP!=null) {
+ if (deniedIP.isEmpty()) {
+ if (dosIP.exists()) {
+ dosIP.delete();
+ }
+ } else {
+ PrintStream fos;
+ try {
+ fos = new PrintStream(new FileOutputStream(dosIP,false));
+ try {
+ for (String ip: deniedIP.keySet()) {
+ fos.println(ip);
+ }
+ } finally {
+ fos.close();
+ }
+ } catch (IOException e) {
+ e.printStackTrace(System.err);
+ }
+ }
+ }
+ }
+
+ private static void readIP() {
+ if (dosIP!=null && dosIP.exists()) {
+ BufferedReader br;
+ try {
+ br = new BufferedReader(new FileReader(dosIP));
+ try {
+ if (deniedIP==null) {
+ deniedIP=new HashMap<>();
+ }
+
+ String line;
+ while ((line=br.readLine())!=null) {
+ deniedIP.put(line, new Counter(line));
+ }
+ } finally {
+ br.close();
+ }
+ } catch (IOException e) {
+ e.printStackTrace(System.err);
+ }
+ }
+ }
+
+
+ /**
+ * Return of "True" means IP has was removed.
+ * Return of "False" means IP wasn't being denied.
+ *
+ * @param ip
+ * @return
+ */
+ public static synchronized boolean removeDenyIP(String ip) {
+ if (deniedIP!=null && deniedIP.remove(ip)!=null) {
+ writeIP();
+ if (deniedIP.isEmpty()) {
+ deniedIP=null;
+ }
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Return of "True" means ID has been added.
+ * Return of "False" means ID already added.
+ *
+ * @param ip
+ * @return
+ */
+ public static synchronized boolean denyID(String id) {
+ boolean rv = false;
+ if (deniedID==null) {
+ deniedID = new HashMap<>();
+ deniedID.put(id, new Counter(id)); // Noted duplicated for minimum time spent
+ rv = true;
+ } else if (deniedID.get(id)==null) {
+ deniedID.put(id, new Counter(id));
+ rv = true;
+ }
+ if (rv) {
+ writeID();
+ }
+ return rv;
+
+ }
+
+ private static void writeID() {
+ if (dosID!=null && deniedID!=null) {
+ if (deniedID.isEmpty()) {
+ if (dosID.exists()) {
+ dosID.delete();
+ }
+ } else {
+ PrintStream fos;
+ try {
+ fos = new PrintStream(new FileOutputStream(dosID,false));
+ try {
+ for (String ip: deniedID.keySet()) {
+ fos.println(ip);
+ }
+ } finally {
+ fos.close();
+ }
+ } catch (IOException e) {
+ e.printStackTrace(System.err);
+ }
+ }
+ }
+ }
+
+ private static void readID() {
+ if (dosID!=null && dosID.exists()) {
+ BufferedReader br;
+ try {
+ br = new BufferedReader(new FileReader(dosID));
+ try {
+ if (deniedID==null) {
+ deniedID=new HashMap<>();
+ }
+
+ String line;
+ while ((line=br.readLine())!=null) {
+ deniedID.put(line, new Counter(line));
+ }
+ } finally {
+ br.close();
+ }
+ } catch (IOException e) {
+ e.printStackTrace(System.err);
+ }
+ }
+ }
+
+ /**
+ * Return of "True" means ID has was removed.
+ * Return of "False" means ID wasn't being denied.
+ *
+ * @param ip
+ * @return
+ */
+ public static synchronized boolean removeDenyID(String id) {
+ if (deniedID!=null && deniedID.remove(id)!=null) {
+ writeID();
+ if (deniedID.isEmpty()) {
+ deniedID=null;
+ }
+
+ return true;
+ }
+ return false;
+ }
+
+ public List<String> report() {
+ int initSize = 0;
+ if (deniedIP!=null)initSize+=deniedIP.size();
+ if (deniedID!=null)initSize+=deniedID.size();
+ ArrayList<String> al = new ArrayList<>(initSize);
+ if (deniedID!=null) {
+ for (Counter c : deniedID.values()) {
+ al.add(c.toString());
+ }
+ }
+ if (deniedIP!=null) {
+ for (Counter c : deniedIP.values()) {
+ al.add(c.toString());
+ }
+ }
+ return al;
+ }
+
+ public static class Counter {
+ private final String name;
+ private int count = 0;
+ private Date first;
+ private long last; // note, we use "last" as long, to avoid popping useless dates on Heap.
+
+ public Counter(String name) {
+ this.name = name;
+ first = null;
+ last = 0L;
+ count = 0;
+ }
+
+ public String getName() {
+ return name;
+ }
+
+ public int getCount() {
+ return count;
+ }
+
+ public long getLast() {
+ return last;
+ }
+
+ /*
+ * Only allow Denial of ServiceTaf to increment
+ */
+ private synchronized void inc() {
+ ++count;
+ last = System.currentTimeMillis();
+ if (first==null) {
+ first = new Date(last);
+ }
+ }
+
+ public String toString() {
+ if (count==0)
+ return name + " is on the denied list, but has not attempted Access";
+ else
+ return
+ name +
+ " has been denied " +
+ count +
+ " times since " +
+ first +
+ ". Last denial was " +
+ new Date(last);
+ }
+ }
+
+ public static TafResp respDenyID(Access access, String identity) {
+ return new DenialOfServiceTafResp(access, RESP.NO_FURTHER_PROCESSING, identity + " is on the Identity Denial list");
+ }
+
+ public static TafResp respDenyIP(Access access, String ip) {
+ return new DenialOfServiceTafResp(access, RESP.NO_FURTHER_PROCESSING, ip + " is on the IP Denial list");
+ }
+
+}
Code Review / ccsdk / apps.git / blobdiff