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

   1 package org.cacert.gigi.util;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.io.FileNotFoundException;
   6 import java.io.FileOutputStream;
   7 import java.io.IOException;
   8 import java.io.InputStream;
   9 import java.io.InputStreamReader;
  10 import java.io.PrintWriter;
  11 import java.io.Reader;
  12 import java.math.BigInteger;
  13 import java.nio.file.Paths;
  14 import java.security.GeneralSecurityException;
  15 import java.security.KeyFactory;
  16 import java.security.KeyPair;
  17 import java.security.KeyPairGenerator;
  18 import java.security.NoSuchAlgorithmException;
  19 import java.security.PrivateKey;
  20 import java.security.PublicKey;
  21 import java.security.Signature;
  22 import java.security.cert.CertificateFactory;
  23 import java.security.cert.X509Certificate;
  24 import java.security.spec.InvalidKeySpecException;
  25 import java.security.spec.PKCS8EncodedKeySpec;
  26 import java.sql.SQLException;
  27 import java.sql.Timestamp;
  28 import java.text.ParseException;
  29 import java.text.SimpleDateFormat;
  30 import java.util.Arrays;
  31 import java.util.Base64;
  32 import java.util.Calendar;
  33 import java.util.Date;
  34 import java.util.HashMap;
  35 import java.util.LinkedList;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Map.Entry;
  39 import java.util.Properties;
  40 import java.util.TimeZone;
  41
  42 import javax.security.auth.x500.X500Principal;
  43
  44 import org.cacert.gigi.crypto.SPKAC;
  45 import org.cacert.gigi.database.DatabaseConnection;
  46 import org.cacert.gigi.database.GigiPreparedStatement;
  47 import org.cacert.gigi.database.GigiResultSet;
  48 import org.cacert.gigi.dbObjects.Certificate;
  49 import org.cacert.gigi.dbObjects.Certificate.CSRType;
  50 import org.cacert.gigi.dbObjects.Certificate.SANType;
  51 import org.cacert.gigi.dbObjects.Certificate.SubjectAlternateName;
  52 import org.cacert.gigi.dbObjects.CertificateProfile;
  53 import org.cacert.gigi.dbObjects.Digest;
  54 import org.cacert.gigi.output.DateSelector;
  55
  56 import sun.security.pkcs10.PKCS10;
  57 import sun.security.util.DerOutputStream;
  58 import sun.security.util.DerValue;
  59 import sun.security.util.ObjectIdentifier;
  60 import sun.security.x509.AVA;
  61 import sun.security.x509.AlgorithmId;
  62 import sun.security.x509.GeneralNameInterface;
  63 import sun.security.x509.RDN;
  64 import sun.security.x509.X500Name;
  65
  66 public class SimpleSigner {
  67
  68     private static GigiPreparedStatement warnMail;
  69
  70     private static GigiPreparedStatement updateMail;
  71
  72     private static GigiPreparedStatement readyCerts;
  73
  74     private static GigiPreparedStatement getSANSs;
  75
  76     private static GigiPreparedStatement revoke;
  77
  78     private static GigiPreparedStatement revokeCompleted;
  79
  80     private static GigiPreparedStatement finishJob;
  81
  82     private static GigiPreparedStatement locateCA;
  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=? 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         locateCA = DatabaseConnection.getInstance().prepare("SELECT id FROM cacerts WHERE keyname=?");
 154
 155         runner = new Thread() {
 156
 157             @Override
 158             public void run() {
 159                 work();
 160             }
 161
 162         };
 163         runner.start();
 164     }
 165
 166     private synchronized static void work() {
 167         try {
 168             gencrl();
 169         } catch (IOException e2) {
 170             e2.printStackTrace();
 171         } catch (InterruptedException e2) {
 172             e2.printStackTrace();
 173         }
 174
 175         while (running) {
 176             try {
 177                 signCertificates();
 178                 revokeCertificates();
 179
 180                 SimpleSigner.class.wait(5000);
 181             } catch (IOException e) {
 182                 e.printStackTrace();
 183             } catch (SQLException e) {
 184                 e.printStackTrace();
 185             } catch (InterruptedException e1) {
 186             }
 187         }
 188         runner = null;
 189     }
 190
 191     private static void revokeCertificates() throws SQLException, IOException, InterruptedException {
 192         GigiResultSet rs = revoke.executeQuery();
 193         boolean worked = false;
 194         while (rs.next()) {
 195             int id = rs.getInt(1);
 196             File crt = KeyStorage.locateCrt(id);
 197             worked = true;
 198             System.out.println("Revoke faked: " + id);
 199             revokeCompleted.setInt(1, id);
 200             revokeCompleted.execute();
 201             finishJob.setInt(1, rs.getInt(3));
 202             finishJob.execute();
 203         }
 204         if (worked) {
 205             gencrl();
 206         }
 207     }
 208
 209     private static void gencrl() throws IOException, InterruptedException {
 210         if (true) {
 211             return;
 212         }
 213         String[] call = new String[] {
 214                 "openssl", "ca",//
 215                 "-cert",
 216                 "../unassured.crt",//
 217                 "-keyfile",
 218                 "../unassured.key",//
 219                 "-gencrl",//
 220                 "-crlhours",//
 221                 "12",//
 222                 "-out",
 223                 "../unassured.crl",//
 224                 "-config",
 225                 "../selfsign.config"
 226
 227         };
 228         Process p1 = Runtime.getRuntime().exec(call, null, new File("keys/unassured.ca"));
 229         if (p1.waitFor() != 0) {
 230             System.out.println("Error while generating crl.");
 231         }
 232     }
 233
 234     private static int counter = 0;
 235
 236     private static void signCertificates() throws SQLException {
 237         GigiResultSet rs = readyCerts.executeQuery();
 238
 239         Calendar c = Calendar.getInstance();
 240         c.setTimeZone(TimeZone.getTimeZone("UTC"));
 241         while (rs.next()) {
 242             String csrname = rs.getString("csr_name");
 243             int id = rs.getInt("id");
 244             System.out.println("sign: " + csrname);
 245             try {
 246                 String csrType = rs.getString("csr_type");
 247                 CSRType ct = CSRType.valueOf(csrType);
 248                 File crt = KeyStorage.locateCrt(id);
 249
 250                 Timestamp from = rs.getTimestamp("executeFrom");
 251                 String length = rs.getString("executeTo");
 252                 Date fromDate;
 253                 Date toDate;
 254                 if (from == null) {
 255                     fromDate = new Date(System.currentTimeMillis());
 256                 } else {
 257                     fromDate = new Date(from.getTime());
 258                 }
 259                 if (length.endsWith("m") || length.endsWith("y")) {
 260                     String num = length.substring(0, length.length() - 1);
 261                     int inter = Integer.parseInt(num);
 262                     c.setTime(fromDate);
 263                     if (length.endsWith("m")) {
 264                         c.add(Calendar.MONTH, inter);
 265                     } else {
 266                         c.add(Calendar.YEAR, inter);
 267                     }
 268                     toDate = c.getTime();
 269                 } else {
 270                     toDate = DateSelector.getDateFormat().parse(length);
 271                 }
 272
 273                 getSANSs.setInt(1, id);
 274                 GigiResultSet san = getSANSs.executeQuery();
 275
 276                 LinkedList<SubjectAlternateName> altnames = new LinkedList<>();
 277                 while (san.next()) {
 278                     altnames.add(new SubjectAlternateName(SANType.valueOf(san.getString("type").toUpperCase()), san.getString("contents")));
 279                 }
 280                 // TODO look them up!
 281                 // cfg.println("keyUsage=critical," +
 282                 // "digitalSignature, keyEncipherment, keyAgreement");
 283                 // cfg.println("extendedKeyUsage=critical," + "clientAuth");
 284                 // cfg.close();
 285
 286                 int profile = rs.getInt("profile");
 287                 CertificateProfile cp = CertificateProfile.getById(profile);
 288                 String s = cp.getId() + "";
 289                 while (s.length() < 4) {
 290                     s = "0" + s;
 291                 }
 292                 s += "-" + cp.getKeyName() + ".cfg";
 293                 Properties caP = new Properties();
 294                 try (FileInputStream inStream = new FileInputStream("signer/profiles/" + s)) {
 295                     caP.load(inStream);
 296                 }
 297                 String ca = caP.getProperty("ca") + "_2015_1";
 298
 299                 HashMap<String, String> subj = new HashMap<>();
 300                 GigiPreparedStatement ps = DatabaseConnection.getInstance().prepare("SELECT name, value FROM `certAvas` WHERE `certId`=?");
 301                 ps.setInt(1, rs.getInt("id"));
 302                 GigiResultSet rs2 = ps.executeQuery();
 303                 while (rs2.next()) {
 304                     String name = rs2.getString("name");
 305                     if (name.equals("EMAIL")) {
 306                         name = "emailAddress";
 307                     }
 308                     subj.put(name, rs2.getString("value"));
 309                 }
 310                 if (subj.size() == 0) {
 311                     subj.put("CN", "<empty>");
 312                     System.out.println("WARNING: DN was empty");
 313                 }
 314                 System.out.println(subj);
 315
 316                 PublicKey pk;
 317                 byte[] data = IOUtils.readURL(new FileInputStream(csrname));
 318                 if (ct == CSRType.SPKAC) {
 319                     String dt = new String(data, "UTF-8");
 320                     if (dt.startsWith("SPKAC=")) {
 321                         dt = dt.substring(6);
 322                         data = dt.getBytes("UTF-8");
 323                         System.out.println(dt);
 324                     }
 325                     SPKAC sp = new SPKAC(Base64.getDecoder().decode(data));
 326                     pk = sp.getPubkey();
 327                 } else {
 328                     PKCS10 p10 = new PKCS10(PEM.decode("(NEW )?CERTIFICATE REQUEST", new String(data, "UTF-8")));
 329                     pk = p10.getSubjectPublicKeyInfo();
 330                 }
 331                 PrivateKey i = loadOpensslKey(new File("signer/ca/" + ca + "/ca.key"));
 332
 333                 String[] call;
 334                 X509Certificate root = (X509Certificate) CertificateFactory.getInstance("X509").generateCertificate(new FileInputStream("signer/ca/" + ca + "/ca.crt"));
 335                 byte[] cert = generateCert(pk, i, subj, root.getSubjectX500Principal(), altnames, fromDate, toDate, Digest.valueOf(rs.getString("md").toUpperCase()), caP.getProperty("eku"));
 336                 PrintWriter out = new PrintWriter(crt);
 337                 out.println("-----BEGIN CERTIFICATE-----");
 338                 out.println(Base64.getMimeEncoder().encodeToString(cert));
 339                 out.println("-----END CERTIFICATE-----");
 340                 out.close();
 341                 // synchronized (sdf) {
 342                 /*
 343                  * call = new String[] { "openssl", "ca",// "-in", "../../" +
 344                  * csrname,// "-cert", "../" + ca + ".crt",// "-keyfile", "../"
 345                  * + ca + ".key",// "-out", "../../" + crt.getPath(),// "-utf8",
 346                  * "-startdate", sdf.format(fromDate),// "-enddate",
 347                  * sdf.format(toDate),// "-batch",// "-md",
 348                  * rs.getString("md"),// "-extfile", "../" + f.getName(),//
 349                  * "-subj", Certificate.stringifyDN(subj),// "-config",
 350                  * "../selfsign.config"// };
 351                  */
 352                 // }
 353
 354                 try (InputStream is = new FileInputStream(crt)) {
 355                     locateCA.setString(1, ca);
 356                     GigiResultSet caRs = locateCA.executeQuery();
 357                     if ( !caRs.next()) {
 358                         throw new Error("ca " + ca + " was not found");
 359                     }
 360
 361                     CertificateFactory cf = CertificateFactory.getInstance("X.509");
 362                     X509Certificate crtp = (X509Certificate) cf.generateCertificate(is);
 363                     BigInteger serial = crtp.getSerialNumber();
 364                     updateMail.setString(1, crt.getPath());
 365                     updateMail.setString(2, serial.toString(16));
 366                     updateMail.setInt(3, caRs.getInt("id"));
 367                     updateMail.setInt(4, id);
 368                     updateMail.execute();
 369
 370                     finishJob.setInt(1, rs.getInt("jobid"));
 371                     finishJob.execute();
 372                     System.out.println("signed: " + id);
 373                     continue;
 374                 }
 375
 376             } catch (GeneralSecurityException e) {
 377                 e.printStackTrace();
 378             } catch (IOException e) {
 379                 e.printStackTrace();
 380             } catch (ParseException e) {
 381                 e.printStackTrace();
 382             }
 383             System.out.println("Error with: " + id);
 384             warnMail.setInt(1, rs.getInt("jobid"));
 385             warnMail.execute();
 386
 387         }
 388         rs.close();
 389     }
 390
 391     private static PrivateKey loadOpensslKey(File f) throws FileNotFoundException, IOException, InvalidKeySpecException, NoSuchAlgorithmException {
 392         byte[] p8b = PEM.decode("RSA PRIVATE KEY", new String(IOUtils.readURL(new FileInputStream(f))));
 393         DerOutputStream dos = new DerOutputStream();
 394         dos.putInteger(0);
 395         new AlgorithmId(new ObjectIdentifier(new int[] {
 396                 1, 2, 840, 113549, 1, 1, 1
 397         })).encode(dos);
 398         dos.putOctetString(p8b);
 399         byte[] ctx = dos.toByteArray();
 400         dos.reset();
 401         dos.write(DerValue.tag_Sequence, ctx);
 402         PKCS8EncodedKeySpec p8 = new PKCS8EncodedKeySpec(dos.toByteArray());
 403         PrivateKey i = KeyFactory.getInstance("RSA").generatePrivate(p8);
 404         return i;
 405     }
 406
 407     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 {
 408         File f = Paths.get("signer", "serial").toFile();
 409         if ( !f.exists()) {
 410             try (FileOutputStream fos = new FileOutputStream(f)) {
 411                 fos.write("1".getBytes("UTF-8"));
 412             }
 413         }
 414         try (FileInputStream fr = new FileInputStream(f)) {
 415             byte[] serial = IOUtils.readURL(fr);
 416             BigInteger ser = new BigInteger(new String(serial).trim());
 417             ser = ser.add(BigInteger.ONE);
 418
 419             PrintWriter pw = new PrintWriter(f);
 420             pw.println(ser);
 421             pw.close();
 422             if (digest != Digest.SHA256 && digest != Digest.SHA512) {
 423                 System.err.println("assuming sha256 either way ;-): " + digest);
 424                 digest = Digest.SHA256;
 425             }
 426             ObjectIdentifier sha512withrsa = new ObjectIdentifier(new int[] {
 427                     1, 2, 840, 113549, 1, 1, digest == Digest.SHA256 ? 11 : 13
 428             });
 429             AlgorithmId aid = new AlgorithmId(sha512withrsa);
 430             Signature s = Signature.getInstance(digest == Digest.SHA256 ? "SHA256withRSA" : "SHA512withRSA");
 431
 432             DerOutputStream cert = new DerOutputStream();
 433             DerOutputStream content = new DerOutputStream();
 434             {
 435                 DerOutputStream version = new DerOutputStream();
 436                 version.putInteger(2); // v3
 437                 content.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0), version);
 438             }
 439             content.putInteger(ser); // Serial
 440             aid.encode(content);
 441
 442             {
 443                 content.write(issuer.getEncoded());
 444             }
 445             {
 446                 DerOutputStream notAround = new DerOutputStream();
 447                 notAround.putUTCTime(fromDate);
 448                 notAround.putUTCTime(toDate);
 449                 content.write(DerValue.tag_Sequence, notAround);
 450             }
 451             {
 452
 453                 X500Name xn = genX500Name(subj);
 454                 content.write(xn.getEncoded());
 455             }
 456             {
 457                 content.write(pk.getEncoded());
 458             }
 459             {
 460                 DerOutputStream extensions = new DerOutputStream();
 461                 {
 462                     addExtension(extensions, new ObjectIdentifier(new int[] {
 463                             2, 5, 29, 17
 464                     }), generateSAN(altnames));
 465                     addExtension(extensions, new ObjectIdentifier(new int[] {
 466                             2, 5, 29, 15
 467                     }), generateKU());
 468                     addExtension(extensions, new ObjectIdentifier(new int[] {
 469                             2, 5, 29, 37
 470                     }), generateEKU(eku));
 471                 }
 472                 DerOutputStream extensionsSeq = new DerOutputStream();
 473                 extensionsSeq.write(DerValue.tag_Sequence, extensions);
 474                 content.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 3), extensionsSeq);
 475             }
 476
 477             DerOutputStream contentSeq = new DerOutputStream();
 478
 479             contentSeq.write(DerValue.tag_Sequence, content.toByteArray());
 480
 481             s.initSign(prk);
 482             s.update(contentSeq.toByteArray());
 483
 484             aid.encode(contentSeq);
 485             contentSeq.putBitString(s.sign());
 486             cert.write(DerValue.tag_Sequence, contentSeq);
 487
 488             // X509Certificate c = (X509Certificate)
 489             // CertificateFactory.getInstance("X509").generateCertificate(new
 490             // ByteArrayInputStream(cert.toByteArray()));
 491             // c.verify(pk); only for self-signeds
 492
 493             return cert.toByteArray();
 494         }
 495
 496     }
 497
 498     private static byte[] generateKU() throws IOException {
 499         DerOutputStream dos = new DerOutputStream();
 500         dos.putBitString(new byte[] {
 501             (byte) 0b10101000
 502         });
 503         return dos.toByteArray();
 504     }
 505
 506     private static byte[] generateEKU(String eku) throws IOException {
 507
 508         DerOutputStream dos = new DerOutputStream();
 509         for (String name : eku.split(",")) {
 510             ObjectIdentifier oid;
 511             switch (name) {
 512             case "serverAuth":
 513                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.1");
 514                 break;
 515             case "clientAuth":
 516                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.2");
 517                 break;
 518             case "codeSigning":
 519                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.3");
 520                 break;
 521             case "emailProtection":
 522                 oid = new ObjectIdentifier("1.3.6.1.5.5.7.3.4");
 523                 break;
 524
 525             default:
 526                 throw new Error(name);
 527             }
 528             dos.putOID(oid);
 529         }
 530         byte[] data = dos.toByteArray();
 531         dos.reset();
 532         dos.write(DerValue.tag_Sequence, data);
 533         return dos.toByteArray();
 534     }
 535
 536     private static X500Name genX500Name(Map<String, String> subj) throws IOException {
 537         LinkedList<RDN> rdns = new LinkedList<>();
 538         for (Entry<String, String> i : subj.entrySet()) {
 539             RDN rdn = genRDN(i);
 540             rdns.add(rdn);
 541         }
 542         return new X500Name(rdns.toArray(new RDN[rdns.size()]));
 543     }
 544
 545     private static RDN genRDN(Entry<String, String> i) throws IOException {
 546         DerOutputStream dos = new DerOutputStream();
 547         dos.putUTF8String(i.getValue());
 548         int[] oid;
 549         String key = i.getKey();
 550         switch (key) {
 551         case "CN":
 552             oid = new int[] {
 553                     2, 5, 4, 3
 554             };
 555             break;
 556         case "EMAIL":
 557         case "emailAddress":
 558             oid = new int[] {
 559                     1, 2, 840, 113549, 1, 9, 1
 560             };
 561             break;
 562         case "O":
 563             oid = new int[] {
 564                     2, 5, 4, 10
 565             };
 566             break;
 567         case "OU":
 568             oid = new int[] {
 569                     2, 5, 4, 11
 570             };
 571             break;
 572         case "ST":
 573             oid = new int[] {
 574                     2, 5, 4, 8
 575             };
 576             break;
 577         case "L":
 578             oid = new int[] {
 579                     2, 5, 4, 7
 580             };
 581             break;
 582         case "C":
 583             oid = new int[] {
 584                     2, 5, 4, 6
 585             };
 586             break;
 587         default:
 588             throw new Error("unknown RDN-type: " + key);
 589         }
 590         RDN rdn = new RDN(new AVA(new ObjectIdentifier(oid), new DerValue(dos.toByteArray())));
 591         return rdn;
 592     }
 593
 594     private static void addExtension(DerOutputStream extensions, ObjectIdentifier oid, byte[] extContent) throws IOException {
 595         DerOutputStream SANs = new DerOutputStream();
 596         SANs.putOID(oid);
 597         SANs.putOctetString(extContent);
 598
 599         extensions.write(DerValue.tag_Sequence, SANs);
 600     }
 601
 602     private static byte[] generateSAN(List<SubjectAlternateName> altnames) throws IOException {
 603         DerOutputStream SANContent = new DerOutputStream();
 604         for (SubjectAlternateName san : altnames) {
 605             byte type = 0;
 606             if (san.getType() == SANType.DNS) {
 607                 type = (byte) GeneralNameInterface.NAME_DNS;
 608             } else if (san.getType() == SANType.EMAIL) {
 609                 type = (byte) GeneralNameInterface.NAME_RFC822;
 610             } else {
 611                 throw new Error("" + san.getType());
 612             }
 613             SANContent.write(DerValue.createTag(DerValue.TAG_CONTEXT, false, type), san.getName().getBytes("UTF-8"));
 614         }
 615         DerOutputStream SANSeqContent = new DerOutputStream();
 616         SANSeqContent.write(DerValue.tag_Sequence, SANContent);
 617         byte[] byteArray = SANSeqContent.toByteArray();
 618         return byteArray;
 619     }
 620 }