util-testing/org/cacert/gigi/util/SimpleSigner.java

   1 package org.cacert.gigi.util;
   2
   3 import java.io.ByteArrayInputStream;
   4 import java.io.File;
   5 import java.io.FileInputStream;
   6 import java.io.FileNotFoundException;
   7 import java.io.FileOutputStream;
   8 import java.io.IOException;
   9 import java.io.InputStream;
  10 import java.io.InputStreamReader;
  11 import java.io.PrintWriter;
  12 import java.io.Reader;
  13 import java.math.BigInteger;
  14 import java.nio.file.Paths;
  15 import java.security.GeneralSecurityException;
  16 import java.security.KeyFactory;
  17 import java.security.KeyPair;
  18 import java.security.KeyPairGenerator;
  19 import java.security.NoSuchAlgorithmException;
  20 import java.security.PrivateKey;
  21 import java.security.PublicKey;
  22 import java.security.Signature;
  23 import java.security.cert.CertificateFactory;
  24 import java.security.cert.X509Certificate;
  25 import java.security.spec.InvalidKeySpecException;
  26 import java.security.spec.PKCS8EncodedKeySpec;
  27 import java.sql.SQLException;
  28 import java.sql.Timestamp;
  29 import java.text.ParseException;
  30 import java.text.SimpleDateFormat;
  31 import java.util.Arrays;
  32 import java.util.Base64;
  33 import java.util.Calendar;
  34 import java.util.Date;
  35 import java.util.HashMap;
  36 import java.util.LinkedList;
  37 import java.util.List;
  38 import java.util.Map;
  39 import java.util.Map.Entry;
  40 import java.util.Properties;
  41 import java.util.TimeZone;
  42
  43 import javax.security.auth.x500.X500Principal;
  44
  45 import org.cacert.gigi.crypto.SPKAC;
  46 import org.cacert.gigi.database.DatabaseConnection;
  47 import org.cacert.gigi.database.GigiPreparedStatement;
  48 import org.cacert.gigi.database.GigiResultSet;
  49 import org.cacert.gigi.dbObjects.Certificate;
  50 import org.cacert.gigi.dbObjects.Certificate.CSRType;
  51 import org.cacert.gigi.dbObjects.Certificate.SANType;
  52 import org.cacert.gigi.dbObjects.Certificate.SubjectAlternateName;
  53 import org.cacert.gigi.dbObjects.CertificateProfile;
  54 import org.cacert.gigi.dbObjects.Digest;
  55 import org.cacert.gigi.output.DateSelector;
  56 import org.cacert.gigi.testUtils.IOUtils;
  57
  58 import sun.security.pkcs10.PKCS10;
  59 import sun.security.util.DerOutputStream;
  60 import sun.security.util.DerValue;
  61 import sun.security.util.ObjectIdentifier;
  62 import sun.security.x509.AVA;
  63 import sun.security.x509.AlgorithmId;
  64 import sun.security.x509.GeneralNameInterface;
  65 import sun.security.x509.RDN;
  66 import sun.security.x509.X500Name;
  67
  68 public class SimpleSigner {
  69
  70     private static GigiPreparedStatement warnMail;
  71
  72     private static GigiPreparedStatement updateMail;
  73
  74     private static GigiPreparedStatement readyCerts;
  75
  76     private static GigiPreparedStatement getSANSs;
  77
  78     private static GigiPreparedStatement revoke;
  79
  80     private static GigiPreparedStatement revokeCompleted;
  81
  82     private static GigiPreparedStatement finishJob;
  83
  84     private static volatile boolean running = true;
  85
  86     private static Thread runner;
  87
  88     private static SimpleDateFormat sdf = new SimpleDateFormat("yyMMddHHmmss'Z'");
  89
  90     static {
  91         TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
  92         sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
  93     }
  94
  95     public static void main(String[] args) throws IOException, SQLException, InterruptedException {
  96         if (false) {
  97             try {
  98                 KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
  99                 kpg.initialize(2048);
 100                 KeyPair kp = kpg.generateKeyPair();
 101                 X500Principal xp = new X500Principal(genX500Name(Certificate.buildDN("CN", "uiae")).getEncoded());
 102                 byte[] i = generateCert(kp.getPublic(), kp.getPrivate(), Certificate.buildDN("CN", "uiae"), xp, Arrays.<SubjectAlternateName>asList(), new Date(), new Date(System.currentTimeMillis() + 1000 * 60 * 60), Digest.SHA512, "clientAuth");
 103                 System.out.println(Base64.getMimeEncoder().encodeToString(i));
 104             } catch (GeneralSecurityException e) {
 105                 e.printStackTrace();
 106             }
 107             return;
 108         }
 109         Properties p = new Properties();
 110         try (Reader reader = new InputStreamReader(new FileInputStream("config/gigi.properties"), "UTF-8")) {
 111             p.load(reader);
 112         }
 113         DatabaseConnection.init(p);
 114
 115         runSigner();
 116     }
 117
 118     public static void stopSigner() throws InterruptedException {
 119         Thread capturedRunner;
 120         synchronized (SimpleSigner.class) {
 121             if (runner == null) {
 122                 throw new IllegalStateException("already stopped");
 123             }
 124             capturedRunner = runner;
 125             running = false;
 126             SimpleSigner.class.notifyAll();
 127         }
 128         capturedRunner.join();
 129     }
 130
 131     public synchronized static void runSigner() throws SQLException, IOException, InterruptedException {
 132         if (runner != null) {
 133             throw new IllegalStateException("already running");
 134         }
 135         running = true;
 136         readyCerts = DatabaseConnection.getInstance().prepare("SELECT certs.id AS id, certs.csr_name, jobs.id AS jobid, csr_type, md, executeFrom, executeTo, profile FROM jobs " + //
 137                 "INNER JOIN certs ON certs.id=jobs.targetId " + //
 138                 "INNER JOIN profiles ON profiles.id=certs.profile " + //
 139                 "WHERE jobs.state='open' "//
 140                 + "AND task='sign'");
 141
 142         getSANSs = DatabaseConnection.getInstance().prepare("SELECT contents, type FROM subjectAlternativeNames " + //
 143                 "WHERE certId=?");
 144
 145         updateMail = DatabaseConnection.getInstance().prepare("UPDATE certs SET crt_name=?," + " created=NOW(), serial=?, caid=1 WHERE id=?");
 146         warnMail = DatabaseConnection.getInstance().prepare("UPDATE jobs SET warning=warning+1, state=IF(warning<3, 'open','error') WHERE id=?");
 147
 148         revoke = DatabaseConnection.getInstance().prepare("SELECT certs.id, certs.csr_name,jobs.id FROM jobs INNER JOIN certs ON jobs.targetId=certs.id" + " WHERE jobs.state='open' AND task='revoke'");
 149         revokeCompleted = DatabaseConnection.getInstance().prepare("UPDATE certs SET revoked=NOW() WHERE id=?");
 150
 151         finishJob = DatabaseConnection.getInstance().prepare("UPDATE jobs SET state='done' WHERE id=?");
 152
 153         runner = new Thread() {
 154
 155             @Override
 156             public void run() {
 157                 work();
 158             }
 159
 160         };
 161         runner.start();
 162     }
 163
 164     private synchronized static void work() {
 165         try {
 166             gencrl();
 167         } catch (IOException e2) {
 168             e2.printStackTrace();
 169         } catch (InterruptedException e2) {
 170             e2.printStackTrace();
 171         }
 172
 173         while (running) {
 174             try {
 175                 signCertificates();
 176                 revokeCertificates();
 177
 178                 SimpleSigner.class.wait(5000);
 179             } catch (IOException e) {
 180                 e.printStackTrace();
 181             } catch (SQLException e) {
 182                 e.printStackTrace();
 183             } catch (InterruptedException e1) {
 184             }
 185         }
 186         runner = null;
 187     }
 188
 189     private static void revokeCertificates() throws SQLException, IOException, InterruptedException {
 190         GigiResultSet rs = revoke.executeQuery();
 191         boolean worked = false;
 192         while (rs.next()) {
 193             int id = rs.getInt(1);
 194             File crt = KeyStorage.locateCrt(id);
 195             String[] call = new String[] {
 196                     "openssl", "ca",//
 197                     "-cert",
 198                     "../unassured.crt",//
 199                     "-keyfile",
 200                     "../unassured.key",//
 201                     "-revoke",
 202                     "../../" + crt.getPath(),//
 203                     "-batch",//
 204                     "-config",
 205                     "../selfsign.config"
 206
 207             };
 208             Process p1 = Runtime.getRuntime().exec(call, null, new File("keys/unassured.ca"));
 209             System.out.println("revoking: " + crt.getPath());
 210             if (p1.waitFor() == 0) {
 211                 worked = true;
 212                 revokeCompleted.setInt(1, id);
 213                 revokeCompleted.execute();
 214                 finishJob.setInt(1, rs.getInt(3));
 215                 finishJob.execute();
 216             } else {
 217                 System.out.println("Failed");
 218             }
 219         }
 220         if (worked) {
 221             gencrl();
 222         }
 223     }
 224
 225     private static void gencrl() throws IOException, InterruptedException {
 226         String[] call = new String[] {
 227                 "openssl", "ca",//
 228                 "-cert",
 229                 "../unassured.crt",//
 230                 "-keyfile",
 231                 "../unassured.key",//
 232                 "-gencrl",//
 233                 "-crlhours",//
 234                 "12",//
 235                 "-out",
 236                 "../unassured.crl",//
 237                 "-config",
 238                 "../selfsign.config"
 239
 240         };
 241         Process p1 = Runtime.getRuntime().exec(call, null, new File("keys/unassured.ca"));
 242         if (p1.waitFor() != 0) {
 243             System.out.println("Error while generating crl.");
 244         }
 245     }
 246
 247     private static int counter = 0;
 248
 249     private static void signCertificates() throws SQLException {
 250         GigiResultSet rs = readyCerts.executeQuery();
 251
 252         Calendar c = Calendar.getInstance();
 253         c.setTimeZone(TimeZone.getTimeZone("UTC"));
 254         while (rs.next()) {
 255             String csrname = rs.getString("csr_name");
 256             int id = rs.getInt("id");
 257             System.out.println("sign: " + csrname);
 258             try {
 259                 String csrType = rs.getString("csr_type");
 260                 CSRType ct = CSRType.valueOf(csrType);
 261                 File crt = KeyStorage.locateCrt(id);
 262
 263                 Timestamp from = rs.getTimestamp("executeFrom");
 264                 String length = rs.getString("executeTo");
 265                 Date fromDate;
 266                 Date toDate;
 267                 if (from == null) {
 268                     fromDate = new Date(System.currentTimeMillis());
 269                 } else {
 270                     fromDate = new Date(from.getTime());
 271                 }
 272                 if (length.endsWith("m") || length.endsWith("y")) {
 273                     String num = length.substring(0, length.length() - 1);
 274                     int inter = Integer.parseInt(num);
 275                     c.setTime(fromDate);
 276                     if (length.endsWith("m")) {
 277                         c.add(Calendar.MONTH, inter);
 278                     } else {
 279                         c.add(Calendar.YEAR, inter);
 280                     }
 281                     toDate = c.getTime();
 282                 } else {
 283                     toDate = DateSelector.getDateFormat().parse(length);
 284                 }
 285
 286                 getSANSs.setInt(1, id);
 287                 GigiResultSet san = getSANSs.executeQuery();
 288
 289                 boolean first = true;
 290                 LinkedList<SubjectAlternateName> altnames = new LinkedList<>();
 291                 while (san.next()) {
 292                     first = false;
 293                     altnames.add(new SubjectAlternateName(SANType.valueOf(san.getString("type").toUpperCase()), san.getString("contents")));
 294                 }
 295                 // TODO look them up!
 296                 // cfg.println("keyUsage=critical," +
 297                 // "digitalSignature, keyEncipherment, keyAgreement");
 298                 // cfg.println("extendedKeyUsage=critical," + "clientAuth");
 299                 // cfg.close();
 300
 301                 int profile = rs.getInt("profile");
 302                 CertificateProfile cp = CertificateProfile.getById(profile);
 303                 String s = cp.getId() + "";
 304                 while (s.length() < 4) {
 305                     s = "0" + s;
 306                 }
 307                 s += "-" + cp.getKeyName() + ".cfg";
 308                 Properties caP = new Properties();
 309                 caP.load(new FileInputStream("signer/profiles/" + s));
 310                 String ca = caP.getProperty("ca") + "_2015_1";
 311
 312                 HashMap<String, String> subj = new HashMap<>();
 313                 GigiPreparedStatement ps = DatabaseConnection.getInstance().prepare("SELECT name, value FROM certAvas WHERE certId=?");
 314                 ps.setInt(1, rs.getInt("id"));
 315                 GigiResultSet rs2 = ps.executeQuery();
 316                 while (rs2.next()) {
 317                     String name = rs2.getString("name");
 318                     if (name.equals("EMAIL")) {
 319                         name = "emailAddress";
 320                     }
 321                     subj.put(name, rs2.getString("value"));
 322                 }
 323                 if (subj.size() == 0) {
 324                     subj.put("CN", "<empty>");
 325                     System.out.println("WARNING: DN was empty");
 326                 }
 327                 System.out.println(subj);
 328
 329                 PublicKey pk;
 330                 byte[] data = IOUtils.readURL(new FileInputStream(csrname));
 331                 if (ct == CSRType.SPKAC) {
 332                     SPKAC sp = new SPKAC(data);
 333                     pk = sp.getPubkey();
 334                 } else {
 335                     PKCS10 p10 = new PKCS10(PEM.decode("(NEW )?CERTIFICATE REQUEST", new String(data)));
 336                     pk = p10.getSubjectPublicKeyInfo();
 337                 }
 338                 PrivateKey i = loadOpensslKey(new File("signer/ca/" + ca + "/ca.key"));
 339
 340                 String[] call;
 341                 X509Certificate root = (X509Certificate) CertificateFactory.getInstance("X509").generateCertificate(new FileInputStream("signer/ca/" + ca + "/ca.crt"));
 342                 byte[] cert = generateCert(pk, i, subj, root.getSubjectX500Principal(), altnames, fromDate, toDate, Digest.valueOf(rs.getString("md").toUpperCase()), caP.getProperty("eku"));
 343                 PrintWriter out = new PrintWriter(crt);
 344                 out.println("-----BEGIN CERTIFICATE-----");
 345                 out.println(Base64.getMimeEncoder().encodeToString(cert));
 346                 out.println("-----END CERTIFICATE-----");
 347                 out.close();
 348                 synchronized (sdf) {
 349                     /*
 350                      * call = new String[] { "openssl", "ca",// "-in", "../../"
 351                      * + csrname,// "-cert", "../" + ca + ".crt",// "-keyfile",
 352                      * "../" + ca + ".key",// "-out", "../../" +
 353                      * crt.getPath(),// "-utf8", "-startdate",
 354                      * sdf.format(fromDate),// "-enddate", sdf.format(toDate),//
 355                      * "-batch",// "-md", rs.getString("md"),// "-extfile",
 356                      * "../" + f.getName(),// "-subj",
 357                      * Certificate.stringifyDN(subj),// "-config",
 358                      * "../selfsign.config"// };
 359                      */
 360                 }
 361
 362                 try (InputStream is = new FileInputStream(crt)) {
 363                     CertificateFactory cf = CertificateFactory.getInstance("X.509");
 364                     X509Certificate crtp = (X509Certificate) cf.generateCertificate(is);
 365                     BigInteger serial = crtp.getSerialNumber();
 366                     updateMail.setString(1, crt.getPath());
 367                     updateMail.setString(2, serial.toString(16));
 368                     updateMail.setInt(3, id);
 369                     updateMail.execute();
 370
 371                     finishJob.setInt(1, rs.getInt("jobid"));
 372                     finishJob.execute();
 373                     System.out.println("signed: " + id);
 374                     continue;
 375                 }
 376
 377             } catch (GeneralSecurityException e) {
 378                 e.printStackTrace();
 379             } catch (IOException e) {
 380                 e.printStackTrace();
 381             } catch (ParseException e) {
 382                 e.printStackTrace();
 383             }
 384             System.out.println("Error with: " + id);
 385             warnMail.setInt(1, rs.getInt("jobid"));
 386             warnMail.execute();
 387
 388         }
 389         rs.close();
 390     }
 391
 392     private static PrivateKey loadOpensslKey(File f) throws FileNotFoundException, IOException, InvalidKeySpecException, NoSuchAlgorithmException {
 393         byte[] p8b = PEM.decode("RSA PRIVATE KEY", new String(IOUtils.readURL(new FileInputStream(f))));
 394         DerOutputStream dos = new DerOutputStream();
 395         dos.putInteger(0);
 396         new AlgorithmId(new ObjectIdentifier(new int[] {
 397                 1, 2, 840, 113549, 1, 1, 1
 398         })).encode(dos);
 399         dos.putOctetString(p8b);
 400         byte[] ctx = dos.toByteArray();
 401         dos.reset();
 402         dos.write(DerValue.tag_Sequence, ctx);
 403         PKCS8EncodedKeySpec p8 = new PKCS8EncodedKeySpec(dos.toByteArray());
 404         PrivateKey i = KeyFactory.getInstance("RSA").generatePrivate(p8);
 405         return i;
 406     }
 407
 408     private static synchronized byte[] generateCert(PublicKey pk, PrivateKey prk, Map<String, String> subj, X500Principal issuer, List<SubjectAlternateName> altnames, Date fromDate, Date toDate, Digest digest, String eku) throws IOException, GeneralSecurityException {
 409         File f = Paths.get("signer", "serial").toFile();
 410         if ( !f.exists()) {
 411             FileOutputStream fos = new FileOutputStream(f);
 412             fos.write("1".getBytes());
 413             fos.close();
 414         }
 415         try (FileInputStream fr = new FileInputStream(f)) {
 416             byte[] serial = IOUtils.readURL(fr);
 417             BigInteger ser = new BigInteger(new String(serial).trim());
 418             ser = ser.add(BigInteger.ONE);
 419
 420             PrintWriter pw = new PrintWriter(f);
 421             pw.println(ser);
 422             pw.close();
 423             if (digest != Digest.SHA256 && digest != Digest.SHA512) {
 424                 System.err.println("assuming sha256 either way ;-): " + digest);
 425                 digest = Digest.SHA256;
 426             }
 427             ObjectIdentifier sha512withrsa = new ObjectIdentifier(new int[] {
 428                     1, 2, 840, 113549, 1, 1, digest == Digest.SHA256 ? 11 : 13
 429             });
 430             AlgorithmId aid = new AlgorithmId(sha512withrsa);
 431             Signature s = Signature.getInstance(digest == Digest.SHA256 ? "SHA256withRSA" : "SHA512withRSA");
 432
 433             DerOutputStream cert = new DerOutputStream();
 434             DerOutputStream content = new DerOutputStream();
 435             {
 436                 DerOutputStream version = new DerOutputStream();
 437                 version.putInteger(2); // v3
 438                 content.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0), version);
 439             }
 440             content.putInteger(ser); // Serial
 441             aid.encode(content);
 442
 443             {
 444                 content.write(issuer.getEncoded());
 445             }
 446             {
 447                 DerOutputStream notAround = new DerOutputStream();
 448                 notAround.putUTCTime(fromDate);
 449                 notAround.putUTCTime(toDate);
 450                 content.write(DerValue.tag_Sequence, notAround);
 451             }
 452             {
 453
 454                 X500Name xn = genX500Name(subj);
 455                 content.write(xn.getEncoded());
 456             }
 457             {
 458                 content.write(pk.getEncoded());
 459             }
 460             {
 461                 DerOutputStream extensions = new DerOutputStream();
 462                 {
 463                     addExtension(extensions, new ObjectIdentifier(new int[] {
 464                             2, 5, 29, 17
 465                     }), generateSAN(altnames));
 466                     addExtension(extensions, new ObjectIdentifier(new int[] {
 467                             2, 5, 29, 15
 468                     }), generateKU());
 469                     addExtension(extensions, new ObjectIdentifier(new int[] {
 470                             2, 5, 29, 37
 471                     }), generateEKU(eku));
 472                 }
 473                 DerOutputStream extensionsSeq = new DerOutputStream();
 474                 extensionsSeq.write(DerValue.tag_Sequence, extensions);
 475                 content.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 3), extensionsSeq);
 476             }
 477
 478             DerOutputStream contentSeq = new DerOutputStream();
 479
 480             contentSeq.write(DerValue.tag_Sequence, content.toByteArray());
 481
 482             s.initSign(prk);
 483             s.update(contentSeq.toByteArray());
 484
 485             aid.encode(contentSeq);
 486             contentSeq.putBitString(s.sign());
 487             cert.write(DerValue.tag_Sequence, contentSeq);
 488
 489             X509Certificate c = (X509Certificate) CertificateFactory.getInstance("X509").generateCertificate(new ByteArrayInputStream(cert.toByteArray()));
 490             // c.verify(pk); only for self-signeds
 491
 492             return cert.toByteArray();
 493         }
 494
 495     }
 496
 497     private static byte[] generateKU() throws IOException {
 498         DerOutputStream dos = new DerOutputStream();
 499         dos.putBitString(new byte[] {
 500             (byte) 0b10101000
 501         });
 502         return dos.toByteArray();
 503     }
 504
 505     private static byte[] generateEKU(String eku) throws IOException {
 506
 507         DerOutputStream dos = new DerOutputStream();
 508         for (String name : eku.split(",")) {
 509             ObjectIdentifier oid;
 510             switch (name) {
 511             case "serverAuth":
 512                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.1");
 513                 break;
 514             case "clientAuth":
 515                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.2");
 516                 break;
 517             case "codeSigning":
 518                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.3");
 519                 break;
 520             case "emailProtection":
 521                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.4");
 522                 break;
 523
 524             default:
 525                 throw new Error(name);
 526             }
 527             dos.putOID(oid);
 528         }
 529         byte[] data = dos.toByteArray();
 530         dos.reset();
 531         dos.write(DerValue.tag_Sequence, data);
 532         return dos.toByteArray();
 533     }
 534
 535     private static X500Name genX500Name(Map<String, String> subj) throws IOException {
 536         LinkedList<RDN> rdns = new LinkedList<>();
 537         for (Entry<String, String> i : subj.entrySet()) {
 538             RDN rdn = genRDN(i);
 539             rdns.add(rdn);
 540         }
 541         return new X500Name(rdns.toArray(new RDN[rdns.size()]));
 542     }
 543
 544     private static RDN genRDN(Entry<String, String> i) throws IOException {
 545         DerOutputStream dos = new DerOutputStream();
 546         dos.putUTF8String(i.getValue());
 547         int[] oid;
 548         String key = i.getKey();
 549         switch (key) {
 550         case "CN":
 551             oid = new int[] {
 552                     2, 5, 4, 3
 553             };
 554             break;
 555         case "EMAIL":
 556         case "emailAddress":
 557             oid = new int[] {
 558                     1, 2, 840, 113549, 1, 9, 1
 559             };
 560             break;
 561         case "O":
 562             oid = new int[] {
 563                     2, 5, 4, 10
 564             };
 565             break;
 566         case "OU":
 567             oid = new int[] {
 568                     2, 5, 4, 11
 569             };
 570             break;
 571         default:
 572             throw new Error("unknown RDN-type: " + key);
 573         }
 574         RDN rdn = new RDN(new AVA(new ObjectIdentifier(oid), new DerValue(dos.toByteArray())));
 575         return rdn;
 576     }
 577
 578     private static void addExtension(DerOutputStream extensions, ObjectIdentifier oid, byte[] extContent) throws IOException {
 579         DerOutputStream SANs = new DerOutputStream();
 580         SANs.putOID(oid);
 581         SANs.putOctetString(extContent);
 582
 583         extensions.write(DerValue.tag_Sequence, SANs);
 584     }
 585
 586     private static byte[] generateSAN(List<SubjectAlternateName> altnames) throws IOException {
 587         DerOutputStream SANContent = new DerOutputStream();
 588         for (SubjectAlternateName san : altnames) {
 589             byte type = 0;
 590             if (san.getType() == SANType.DNS) {
 591                 type = (byte) GeneralNameInterface.NAME_DNS;
 592             } else if (san.getType() == SANType.EMAIL) {
 593                 type = (byte) GeneralNameInterface.NAME_RFC822;
 594             } else {
 595                 throw new Error("" + san.getType());
 596             }
 597             SANContent.write(DerValue.createTag(DerValue.TAG_CONTEXT, false, type), san.getName().getBytes());
 598         }
 599         DerOutputStream SANSeqContent = new DerOutputStream();
 600         SANSeqContent.write(DerValue.tag_Sequence, SANContent);
 601         byte[] byteArray = SANSeqContent.toByteArray();
 602         return byteArray;
 603     }
 604 }