cadi/core/src/main/java/org/onap/aaf/cadi/taf/cert/X509Taf.java

   1 /**
   2  * ============LICENSE_START====================================================
   3  * org.onap.aaf
   4  * ===========================================================================
   5  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   6  * ===========================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END====================================================
  19  *
  20  */
  21
  22 package org.onap.aaf.cadi.taf.cert;
  23
  24 import java.io.ByteArrayInputStream;
  25 import java.io.ByteArrayOutputStream;
  26 import java.security.MessageDigest;
  27 import java.security.NoSuchAlgorithmException;
  28 import java.security.Signature;
  29 import java.security.cert.CertificateException;
  30 import java.security.cert.CertificateFactory;
  31 import java.security.cert.X509Certificate;
  32 import java.util.ArrayList;
  33
  34 import javax.net.ssl.TrustManagerFactory;
  35 import javax.servlet.http.HttpServletRequest;
  36 import javax.servlet.http.HttpServletResponse;
  37
  38 import org.onap.aaf.cadi.Access;
  39 import org.onap.aaf.cadi.CachedPrincipal;
  40 import org.onap.aaf.cadi.CadiException;
  41 import org.onap.aaf.cadi.Lur;
  42 import org.onap.aaf.cadi.Symm;
  43 import org.onap.aaf.cadi.Access.Level;
  44 import org.onap.aaf.cadi.CachedPrincipal.Resp;
  45 import org.onap.aaf.cadi.Taf.LifeForm;
  46 import org.onap.aaf.cadi.config.Config;
  47 import org.onap.aaf.cadi.config.SecurityInfo;
  48 import org.onap.aaf.cadi.config.SecurityInfoC;
  49 import org.onap.aaf.cadi.principal.TaggedPrincipal;
  50 import org.onap.aaf.cadi.principal.X509Principal;
  51 import org.onap.aaf.cadi.taf.HttpTaf;
  52 import org.onap.aaf.cadi.taf.TafResp;
  53 import org.onap.aaf.cadi.taf.TafResp.RESP;
  54 import org.onap.aaf.cadi.util.Split;
  55
  56 public class X509Taf implements HttpTaf {
  57
  58         private static final String CERTIFICATE_NOT_VALID_FOR_AUTHENTICATION = "Certificate NOT valid for Authentication";
  59         public static final CertificateFactory certFactory;
  60         public static final MessageDigest messageDigest;
  61         public static final TrustManagerFactory tmf;
  62         private Access access;
  63         private CertIdentity[] certIdents;
  64 //      private Lur lur;
  65         private ArrayList<String> cadiIssuers;
  66         private String env;
  67         private SecurityInfo si;
  68
  69         static {
  70                 try {
  71                         certFactory = CertificateFactory.getInstance("X.509");
  72                         messageDigest = MessageDigest.getInstance("SHA-256"); // use this to clone
  73                         tmf = TrustManagerFactory.getInstance(SecurityInfoC.SSL_KEY_MANAGER_FACTORY_ALGORITHM);
  74                 } catch (Exception e) {
  75                         throw new RuntimeException("X.509 and SHA-256 are required for X509Taf",e);
  76                 }
  77         }
  78
  79         public X509Taf(Access access, Lur lur, CertIdentity ... cis) throws CertificateException, NoSuchAlgorithmException, CadiException {
  80                 this.access = access;
  81                 env = access.getProperty(Config.AAF_ENV,null);
  82                 if(env==null) {
  83                         throw new CadiException("X509Taf requires Environment ("+Config.AAF_ENV+") to be set.");
  84                 }
  85 //              this.lur = lur;
  86                 this.cadiIssuers = new ArrayList<String>();
  87                 for(String ci : access.getProperty(Config.CADI_X509_ISSUERS, "").split(":")) {
  88                         access.printf(Level.INIT, "Trusting Identity for Certificates signed by \"%s\"",ci);
  89                         cadiIssuers.add(ci);
  90                 }
  91                 try {
  92                         Class<?> dci = access.classLoader().loadClass("org.onap.aaf.auth.direct.DirectCertIdentity");
  93                         if(dci==null) {
  94                                 certIdents = cis;
  95                         } else {
  96                                 CertIdentity temp[] = new CertIdentity[cis.length+1];
  97                                 System.arraycopy(cis, 0, temp, 1, cis.length);
  98                                 temp[0] = (CertIdentity) dci.newInstance();
  99                                 certIdents=temp;
 100                         }
 101                 } catch (Exception e) {
 102                         certIdents = cis;
 103                 }
 104
 105                 si = new SecurityInfo(access);
 106         }
 107
 108         public static final X509Certificate getCert(byte[] certBytes) throws CertificateException {
 109                 ByteArrayInputStream bais = new ByteArrayInputStream(certBytes);
 110                 return (X509Certificate)certFactory.generateCertificate(bais);
 111         }
 112
 113         public static final byte[] getFingerPrint(byte[] ba) {
 114                 MessageDigest md;
 115                 try {
 116                         md = (MessageDigest)messageDigest.clone();
 117                 } catch (CloneNotSupportedException e) {
 118                         // should never get here
 119                         return new byte[0];
 120                 }
 121                 md.update(ba);
 122                 return md.digest();
 123         }
 124
 125         @Override
 126         public TafResp validate(LifeForm reading, HttpServletRequest req, HttpServletResponse resp) {
 127                 // Check for Mutual SSL
 128                 try {
 129                         X509Certificate[] certarr = (X509Certificate[])req.getAttribute("javax.servlet.request.X509Certificate");
 130                         if(certarr!=null && certarr.length>0) {
 131                                 si.checkClientTrusted(certarr);
 132                                 // Note: If the Issuer is not in the TrustStore, it's not added to the Cert list
 133                                 String issuer = certarr[0].getIssuerDN().toString();
 134                                 if(cadiIssuers.contains(issuer)) {
 135                                         String subject = certarr[0].getSubjectDN().getName();
 136                                         // avoiding extra object creation, since this is validated EVERY transaction with a Cert
 137                                         int at = subject.indexOf('@');
 138                                         if(at>=0) {
 139                                                 int start = subject.lastIndexOf(',', at);
 140                                                 if(start<0) {
 141                                                         start = 0;
 142                                                 }
 143                                                 int end = subject.indexOf(',', at);
 144                                                 if(end<0) {
 145                                                         end=subject.length();
 146                                                 }
 147                                                 int temp;
 148                                                 if(((temp=subject.indexOf("OU=",start))>=0 && temp<end) ||
 149                                                    ((temp=subject.indexOf("CN=",start))>=0 && temp<end)) {
 150                                                         String[] sa = Split.splitTrim(':', subject, temp+3,end);
 151                                                         if(sa.length==1 || (sa.length>1 && env!=null && env.equals(sa[1]))) { // Check Environment
 152                                                                 return new X509HttpTafResp(access,
 153                                                                                 new X509Principal(sa[0], certarr[0],(byte[])null),
 154                                                                                 "X509Taf validated " + sa[0] + (sa.length<2?"":" for aaf_env " + env ), RESP.IS_AUTHENTICATED);
 155                                                         }
 156                                                 }
 157
 158                                         }
 159                                 }
 160                         }
 161
 162
 163                         byte[] array = null;
 164                         byte[] certBytes = null;
 165                         X509Certificate cert=null;
 166                         String responseText=null;
 167                         String authHeader = req.getHeader("Authorization");
 168
 169                         if(certarr!=null) {  // If cert !=null, Cert is Tested by Mutual Protocol.
 170                                 if(authHeader!=null) { // This is only intended to be a Secure Connection, not an Identity
 171                                         for(String auth : Split.split(',',authHeader)) {
 172                                                 if(auth.startsWith("Bearer ")) { // Bearer = OAuth... Don't use as Authenication
 173                                                         return new X509HttpTafResp(access, null, "Certificate verified, but Bearer Token is presented", RESP.TRY_ANOTHER_TAF);
 174                                                 }
 175                                         }
 176                                 }
 177                                 cert = certarr[0];
 178                                 responseText = ", validated by Mutual SSL Protocol";
 179                         } else {                 // If cert == null, Get Declared Cert (in header), but validate by having them sign something
 180                                 if(authHeader != null) {
 181                                         for(String auth : Split.splitTrim(',',authHeader)) {
 182                                                 if(auth.startsWith("x509 ")) {
 183                                                         ByteArrayOutputStream baos = new ByteArrayOutputStream(auth.length());
 184                                                         try {
 185                                                                 array = auth.getBytes();
 186                                                                 ByteArrayInputStream bais = new ByteArrayInputStream(array);
 187                                                                 Symm.base64noSplit.decode(bais, baos, 5);
 188                                                                 certBytes = baos.toByteArray();
 189                                                                 cert = getCert(certBytes);
 190
 191                                                                 /**
 192                                                                  * Identity from CERT if well know CA and specific encoded information
 193                                                                  */
 194                                                                 // If found Identity doesn't work, try SignedStuff Protocol
 195                 //                                                                      cert.checkValidity();
 196                 //                                                                      cert.--- GET FINGERPRINT?
 197                                                                 String stuff = req.getHeader("Signature");
 198                                                                 if(stuff==null)
 199                                                                         return new X509HttpTafResp(access, null, "Header entry 'Signature' required to validate One way X509 Certificate", RESP.TRY_ANOTHER_TAF);
 200                                                                 String data = req.getHeader("Data");
 201                 //                                                                      if(data==null)
 202                 //                                                                              return new X509HttpTafResp(access, null, "No signed Data to validate with X509 Certificate", RESP.TRY_ANOTHER_TAF);
 203
 204                                                                 // Note: Data Pos shows is "<signatureType> <data>"
 205                 //                                                                      int dataPos = (stuff.indexOf(' ')); // determine what is Algorithm
 206                                                                 // Get Signature
 207                                                                 bais = new ByteArrayInputStream(stuff.getBytes());
 208                                                                 baos = new ByteArrayOutputStream(stuff.length());
 209                                                                 Symm.base64noSplit.decode(bais, baos);
 210                                                                 array = baos.toByteArray();
 211                 //                                                                      Signature sig = Signature.getInstance(stuff.substring(0, dataPos)); // get Algorithm from first part of Signature
 212
 213                                                                 Signature sig = Signature.getInstance(cert.getSigAlgName());
 214                                                                 sig.initVerify(cert.getPublicKey());
 215                                                                 sig.update(data.getBytes());
 216                                                                 if(!sig.verify(array)) {
 217                                                                         access.log(Level.ERROR, "Signature doesn't Match");
 218                                                                         return new X509HttpTafResp(access, null, CERTIFICATE_NOT_VALID_FOR_AUTHENTICATION, RESP.TRY_ANOTHER_TAF);
 219                                                                 }
 220                                                                 responseText = ", validated by Signed Data";
 221                                                         } catch (Exception e) {
 222                                                                 access.log(e, "Exception while validating Cert");
 223                                                                 return new X509HttpTafResp(access, null, CERTIFICATE_NOT_VALID_FOR_AUTHENTICATION, RESP.TRY_ANOTHER_TAF);
 224                                                         }
 225                                                 }
 226                                         }
 227                                 }
 228                                 if(cert==null) {
 229                                         return new X509HttpTafResp(access, null, "No Certificate Info on Transaction", RESP.TRY_ANOTHER_TAF);
 230                                 }
 231
 232                                 // A cert has been found, match Identify
 233                                 TaggedPrincipal prin=null;
 234
 235                                 for(int i=0;prin==null && i<certIdents.length;++i) {
 236                                         if((prin=certIdents[i].identity(req, cert, certBytes))!=null) {
 237                                                 responseText = prin.getName() + " matches Certificate " + cert.getSubjectX500Principal().getName() + responseText;
 238                                         }
 239                                 }
 240
 241                                 // if Principal is found, check for "AS_USER" and whether this entity is trusted to declare
 242                                 if(prin!=null) {
 243                                         return new X509HttpTafResp(
 244                                                 access,
 245                                                 prin,
 246                                                 responseText,
 247                                                 RESP.IS_AUTHENTICATED);
 248                                 }
 249                         }
 250                 } catch(Exception e) {
 251                         return new X509HttpTafResp(access, null, e.getMessage(), RESP.TRY_ANOTHER_TAF);
 252                 }
 253
 254                 return new X509HttpTafResp(access, null, "Certificate cannot be used for authentication", RESP.TRY_ANOTHER_TAF);
 255         }
 256
 257         @Override
 258         public Resp revalidate(CachedPrincipal prin, Object state) {
 259                 return null;
 260         }
 261
 262 }