src/org/cacert/gigi/pages/account/certs/CertificateRequest.java

   1 package org.cacert.gigi.pages.account.certs;
   2
   3 import java.io.IOException;
   4 import java.io.PrintWriter;
   5 import java.security.GeneralSecurityException;
   6 import java.security.PublicKey;
   7 import java.security.interfaces.DSAPublicKey;
   8 import java.security.interfaces.ECPublicKey;
   9 import java.security.interfaces.RSAPublicKey;
  10 import java.util.Arrays;
  11 import java.util.Base64;
  12 import java.util.HashMap;
  13 import java.util.HashSet;
  14 import java.util.LinkedHashSet;
  15 import java.util.Set;
  16 import java.util.TreeSet;
  17
  18 import javax.servlet.http.HttpServletRequest;
  19
  20 import org.cacert.gigi.GigiApiException;
  21 import org.cacert.gigi.crypto.SPKAC;
  22 import org.cacert.gigi.dbObjects.Certificate;
  23 import org.cacert.gigi.dbObjects.Certificate.CSRType;
  24 import org.cacert.gigi.dbObjects.Certificate.SANType;
  25 import org.cacert.gigi.dbObjects.Certificate.SubjectAlternateName;
  26 import org.cacert.gigi.dbObjects.CertificateOwner;
  27 import org.cacert.gigi.dbObjects.CertificateProfile;
  28 import org.cacert.gigi.dbObjects.CertificateProfile.PropertyTemplate;
  29 import org.cacert.gigi.dbObjects.Digest;
  30 import org.cacert.gigi.dbObjects.Organisation;
  31 import org.cacert.gigi.dbObjects.User;
  32 import org.cacert.gigi.output.template.Scope;
  33 import org.cacert.gigi.output.template.SprintfCommand;
  34 import org.cacert.gigi.util.PEM;
  35
  36 import sun.security.pkcs.PKCS9Attribute;
  37 import sun.security.pkcs10.PKCS10;
  38 import sun.security.pkcs10.PKCS10Attribute;
  39 import sun.security.pkcs10.PKCS10Attributes;
  40 import sun.security.util.DerInputStream;
  41 import sun.security.util.DerValue;
  42 import sun.security.util.ObjectIdentifier;
  43 import sun.security.x509.AVA;
  44 import sun.security.x509.AlgorithmId;
  45 import sun.security.x509.CertificateExtensions;
  46 import sun.security.x509.DNSName;
  47 import sun.security.x509.ExtendedKeyUsageExtension;
  48 import sun.security.x509.Extension;
  49 import sun.security.x509.GeneralName;
  50 import sun.security.x509.GeneralNameInterface;
  51 import sun.security.x509.GeneralNames;
  52 import sun.security.x509.PKIXExtensions;
  53 import sun.security.x509.RDN;
  54 import sun.security.x509.RFC822Name;
  55 import sun.security.x509.SubjectAlternativeNameExtension;
  56 import sun.security.x509.X500Name;
  57
  58 public class CertificateRequest {
  59
  60     public static final String DEFAULT_CN = "CAcert WoT User";
  61
  62     public static final ObjectIdentifier OID_KEY_USAGE_SSL_SERVER = ObjectIdentifier.newInternal(new int[] {
  63             1, 3, 6, 1, 5, 5, 7, 3, 1
  64     });
  65
  66     public static final ObjectIdentifier OID_KEY_USAGE_SSL_CLIENT = ObjectIdentifier.newInternal(new int[] {
  67             1, 3, 6, 1, 5, 5, 7, 3, 2
  68     });
  69
  70     public static final ObjectIdentifier OID_KEY_USAGE_CODESIGN = ObjectIdentifier.newInternal(new int[] {
  71             1, 3, 6, 1, 5, 5, 7, 3, 3
  72     });
  73
  74     public static final ObjectIdentifier OID_KEY_USAGE_EMAIL_PROTECTION = ObjectIdentifier.newInternal(new int[] {
  75             1, 3, 6, 1, 5, 5, 7, 3, 4
  76     });
  77
  78     public static final ObjectIdentifier OID_KEY_USAGE_TIMESTAMP = ObjectIdentifier.newInternal(new int[] {
  79             1, 3, 6, 1, 5, 5, 7, 3, 8
  80     });
  81
  82     public static final ObjectIdentifier OID_KEY_USAGE_OCSP = ObjectIdentifier.newInternal(new int[] {
  83             1, 3, 6, 1, 5, 5, 7, 3, 9
  84     });
  85
  86     private CSRType csrType;
  87
  88     private final PublicKey pk;
  89
  90     private String csr;
  91
  92     public String name = DEFAULT_CN;
  93
  94     private Set<SubjectAlternateName> SANs;
  95
  96     private Digest selectedDigest = Digest.getDefault();
  97
  98     private CertificateProfile profile = CertificateProfile.getById(1);
  99
 100     private String ou = "";
 101
 102     private Organisation org = null;
 103
 104     private User u;
 105
 106     private String pDNS, pMail;
 107
 108     public CertificateRequest(User issuer, String csr) throws IOException, GeneralSecurityException, GigiApiException {
 109         this(issuer, csr, (CertificateProfile) null);
 110     }
 111
 112     public CertificateRequest(User issuer, String csr, CertificateProfile cp) throws GeneralSecurityException, IOException, IOException {
 113         u = issuer;
 114         if (cp != null) {
 115             profile = cp;
 116         } else if (u.getAssurancePoints() > 50) {
 117             profile = CertificateProfile.getByName("client-a");
 118         }
 119         byte[] data = PEM.decode("(NEW )?CERTIFICATE REQUEST", csr);
 120         PKCS10 parsed = new PKCS10(data);
 121         PKCS10Attributes atts = parsed.getAttributes();
 122
 123         TreeSet<SubjectAlternateName> SANs = new TreeSet<>();
 124         for (RDN r : parsed.getSubjectName().rdns()) {
 125             for (AVA a : r.avas()) {
 126                 if (a.getObjectIdentifier().equals((Object) PKCS9Attribute.EMAIL_ADDRESS_OID)) {
 127                     SANs.add(new SubjectAlternateName(SANType.EMAIL, a.getValueString()));
 128                 } else if (a.getObjectIdentifier().equals((Object) X500Name.commonName_oid)) {
 129                     String value = a.getValueString();
 130                     if (value.contains(".") && !value.contains(" ")) {
 131                         SANs.add(new SubjectAlternateName(SANType.DNS, value));
 132                     } else {
 133                         name = value;
 134                     }
 135                 } else if (a.getObjectIdentifier().equals((Object) PKIXExtensions.SubjectAlternativeName_Id)) {
 136                     // TODO? parse invalid SANs
 137                 }
 138             }
 139         }
 140
 141         for (PKCS10Attribute b : atts.getAttributes()) {
 142
 143             if ( !b.getAttributeId().equals((Object) PKCS9Attribute.EXTENSION_REQUEST_OID)) {
 144                 // unknown attrib
 145                 continue;
 146             }
 147
 148             for (Extension c : ((CertificateExtensions) b.getAttributeValue()).getAllExtensions()) {
 149                 if (c instanceof SubjectAlternativeNameExtension) {
 150
 151                     SubjectAlternativeNameExtension san = (SubjectAlternativeNameExtension) c;
 152                     GeneralNames obj = san.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
 153                     for (int i = 0; i < obj.size(); i++) {
 154                         GeneralName generalName = obj.get(i);
 155                         GeneralNameInterface peeled = generalName.getName();
 156                         if (peeled instanceof DNSName) {
 157                             SANs.add(new SubjectAlternateName(SANType.DNS, ((DNSName) peeled).getName()));
 158                         } else if (peeled instanceof RFC822Name) {
 159                             SANs.add(new SubjectAlternateName(SANType.EMAIL, ((RFC822Name) peeled).getName()));
 160                         }
 161                     }
 162                 } else if (c instanceof ExtendedKeyUsageExtension) {
 163                     ExtendedKeyUsageExtension ekue = (ExtendedKeyUsageExtension) c;
 164                     String appendix = "";
 165                     if (u.getAssurancePoints() >= 50) {
 166                         appendix = "-a";
 167                     }
 168                     for (String s : ekue.getExtendedKeyUsage()) {
 169                         if (s.equals(OID_KEY_USAGE_SSL_SERVER.toString())) {
 170                             // server
 171                             profile = CertificateProfile.getByName("server" + appendix);
 172                         } else if (s.equals(OID_KEY_USAGE_SSL_CLIENT.toString())) {
 173                             // client
 174                             profile = CertificateProfile.getByName("client" + appendix);
 175                         } else if (s.equals(OID_KEY_USAGE_CODESIGN.toString())) {
 176                             // code sign
 177                         } else if (s.equals(OID_KEY_USAGE_EMAIL_PROTECTION.toString())) {
 178                             // emailProtection
 179                             profile = CertificateProfile.getByName("mail" + appendix);
 180                         } else if (s.equals(OID_KEY_USAGE_TIMESTAMP.toString())) {
 181                             // timestamp
 182                         } else if (s.equals(OID_KEY_USAGE_OCSP.toString())) {
 183                             // OCSP
 184                         }
 185                     }
 186                 } else {
 187                     // Unknown requested extension
 188                 }
 189             }
 190
 191         }
 192         this.SANs = SANs;
 193         pk = parsed.getSubjectPublicKeyInfo();
 194         String sign = getSignatureAlgorithm(data);
 195         guessDigest(sign);
 196
 197         this.csr = csr;
 198         this.csrType = CSRType.CSR;
 199     }
 200
 201     public CertificateRequest(User issuer, String spkac, String spkacChallenge) throws IOException, GigiApiException, GeneralSecurityException {
 202         u = issuer;
 203         String cleanedSPKAC = spkac.replaceAll("[\r\n]", "");
 204         byte[] data = Base64.getDecoder().decode(cleanedSPKAC);
 205         SPKAC parsed = new SPKAC(data);
 206         if ( !parsed.getChallenge().equals(spkacChallenge)) {
 207             throw new GigiApiException("Challenge mismatch");
 208         }
 209         pk = parsed.getPubkey();
 210         String sign = getSignatureAlgorithm(data);
 211         guessDigest(sign);
 212         this.SANs = new HashSet<>();
 213         this.csr = "SPKAC=" + cleanedSPKAC;
 214         this.csrType = CSRType.SPKAC;
 215
 216     }
 217
 218     private static String getSignatureAlgorithm(byte[] data) throws IOException {
 219         DerInputStream in = new DerInputStream(data);
 220         DerValue[] seq = in.getSequence(3);
 221         return AlgorithmId.parse(seq[1]).getName();
 222     }
 223
 224     private void guessDigest(String sign) {
 225         if (sign.toLowerCase().startsWith("sha512")) {
 226             selectedDigest = Digest.SHA512;
 227         } else if (sign.toLowerCase().startsWith("sha384")) {
 228             selectedDigest = Digest.SHA384;
 229         }
 230     }
 231
 232     public void checkKeyStrength(PrintWriter out) {
 233         out.println("Type: " + pk.getAlgorithm() + "<br/>");
 234         if (pk instanceof RSAPublicKey) {
 235             out.println("Exponent: " + ((RSAPublicKey) pk).getPublicExponent() + "<br/>");
 236             out.println("Length: " + ((RSAPublicKey) pk).getModulus().bitLength());
 237         } else if (pk instanceof DSAPublicKey) {
 238             DSAPublicKey dpk = (DSAPublicKey) pk;
 239             out.println("Length: " + dpk.getY().bitLength() + "<br/>");
 240             out.println(dpk.getParams());
 241         } else if (pk instanceof ECPublicKey) {
 242             ECPublicKey epk = (ECPublicKey) pk;
 243             out.println("Length-x: " + epk.getW().getAffineX().bitLength() + "<br/>");
 244             out.println("Length-y: " + epk.getW().getAffineY().bitLength() + "<br/>");
 245             out.println(epk.getParams().getCurve());
 246         }
 247     }
 248
 249     private Set<SubjectAlternateName> parseSANBox(String SANs) {
 250         String[] SANparts = SANs.split("[\r\n]+|, *");
 251         Set<SubjectAlternateName> parsedNames = new LinkedHashSet<>();
 252         for (String SANline : SANparts) {
 253             String[] parts = SANline.split(":", 2);
 254             if (parts.length == 1) {
 255                 if (parts[0].trim().equals("")) {
 256                     continue;
 257                 }
 258                 if (parts[0].contains("@")) {
 259                     parsedNames.add(new SubjectAlternateName(SANType.EMAIL, parts[0]));
 260                 } else {
 261                     parsedNames.add(new SubjectAlternateName(SANType.DNS, parts[0]));
 262                 }
 263                 continue;
 264             }
 265             try {
 266                 SANType t = Certificate.SANType.valueOf(parts[0].toUpperCase().trim());
 267                 if (t == null) {
 268                     continue;
 269                 }
 270                 parsedNames.add(new SubjectAlternateName(t, parts[1].trim()));
 271             } catch (IllegalArgumentException e) {
 272                 // invalid enum type
 273                 continue;
 274             }
 275         }
 276         return parsedNames;
 277     }
 278
 279     public Set<SubjectAlternateName> getSANs() {
 280         return SANs;
 281     }
 282
 283     public String getName() {
 284         return name;
 285     }
 286
 287     public Organisation getOrg() {
 288         return org;
 289     }
 290
 291     public String getOu() {
 292         return ou;
 293     }
 294
 295     public Digest getSelectedDigest() {
 296         return selectedDigest;
 297     }
 298
 299     public CertificateProfile getProfile() {
 300         return profile;
 301     }
 302
 303     public synchronized boolean update(String nameIn, String hashAlg, String profileStr, String newOrgStr, String ou, String SANsStr, PrintWriter out, HttpServletRequest req) throws GigiApiException {
 304         GigiApiException error = new GigiApiException();
 305         this.name = nameIn;
 306         if (hashAlg != null) {
 307             selectedDigest = Digest.valueOf(hashAlg);
 308         }
 309         this.profile = CertificateProfile.getByName(profileStr);
 310         if (newOrgStr != null) {
 311             Organisation neworg = Organisation.getById(Integer.parseInt(newOrgStr));
 312             if (neworg == null || u.getOrganisations().contains(neworg)) {
 313                 PropertyTemplate orga = profile.getTemplates().get("orga");
 314                 if (orga != null) {
 315                     org = neworg;
 316                 } else {
 317                     org = null;
 318                     error.mergeInto(new GigiApiException("No organisations for this certificate profile."));
 319                 }
 320             } else {
 321                 error.mergeInto(new GigiApiException("Selected organisation is not part of your account."));
 322             }
 323         }
 324
 325         this.ou = ou;
 326
 327         if ( !this.profile.canBeIssuedBy(u)) {
 328             this.profile = CertificateProfile.getById(1);
 329             error.mergeInto(new GigiApiException("Certificate Profile is invalid."));
 330             throw error;
 331         }
 332
 333         CertificateOwner owner = org != null ? org : u;
 334
 335         verifySANs(error, profile, parseSANBox(SANsStr), owner);
 336
 337         if ( !error.isEmpty()) {
 338             throw error;
 339         }
 340         return true;
 341     }
 342
 343     private void verifySANs(GigiApiException error, CertificateProfile p, Set<SubjectAlternateName> sANs2, CertificateOwner owner) {
 344         Set<SubjectAlternateName> filteredSANs = new LinkedHashSet<>();
 345         PropertyTemplate domainTemp = p.getTemplates().get("domain");
 346         PropertyTemplate emailTemp = p.getTemplates().get("email");
 347         pDNS = null;
 348         pMail = null;
 349         for (SubjectAlternateName san : sANs2) {
 350             if (san.getType() == SANType.DNS) {
 351                 if (domainTemp != null && owner.isValidDomain(san.getName())) {
 352                     if (pDNS != null && !domainTemp.isMultiple()) {
 353                         // remove
 354                     } else {
 355                         if (pDNS == null) {
 356                             pDNS = san.getName();
 357                         }
 358                         filteredSANs.add(san);
 359                         continue;
 360                     }
 361                 }
 362             } else if (san.getType() == SANType.EMAIL) {
 363                 if (emailTemp != null && owner.isValidEmail(san.getName())) {
 364                     if (pMail != null && !emailTemp.isMultiple()) {
 365                         // remove
 366                     } else {
 367                         if (pMail == null) {
 368                             pMail = san.getName();
 369                         }
 370                         filteredSANs.add(san);
 371                         continue;
 372                     }
 373                 }
 374             }
 375             HashMap<String, Object> vars = new HashMap<>();
 376             vars.put("SAN", san.getType().toString().toLowerCase() + ":" + san.getName());
 377             error.mergeInto(new GigiApiException(new Scope(new SprintfCommand(//
 378                     "The requested Subject alternate name \"{0}\" has been removed.", Arrays.asList("${SAN}")), vars)));
 379         }
 380         SANs = filteredSANs;
 381     }
 382
 383     // domain email name name=WoTUser orga
 384     public synchronized Certificate draft() throws GigiApiException {
 385
 386         GigiApiException error = new GigiApiException();
 387
 388         HashMap<String, String> subject = new HashMap<>();
 389         PropertyTemplate domainTemp = profile.getTemplates().get("domain");
 390         PropertyTemplate emailTemp = profile.getTemplates().get("email");
 391         PropertyTemplate nameTemp = profile.getTemplates().get("name");
 392         PropertyTemplate wotUserTemp = profile.getTemplates().get("name=WoTUser");
 393         verifySANs(error, profile, SANs, org != null ? org : u);
 394
 395         // Ok, let's determine the CN
 396         // the CN is
 397         // 1. the user's "real name", iff the real name is to be included i.e.
 398         // not empty (name), or to be forced to WOTUser
 399
 400         // 2. the user's "primary domain", iff "1." doesn't match and there is a
 401         // primary domain. (domainTemp != null)
 402
 403         String verifiedCN = null;
 404         if (org == null) {
 405             verifiedCN = verifyName(error, nameTemp, wotUserTemp, verifiedCN);
 406         } else {
 407             if ( !name.equals("")) {
 408                 verifiedCN = name;
 409             }
 410         }
 411         if (pDNS == null && domainTemp != null && domainTemp.isRequired()) {
 412             error.mergeInto(new GigiApiException("Server Certificates require a DNS name."));
 413         } else if (domainTemp != null && verifiedCN == null) {
 414             // user may add domains
 415             verifiedCN = pDNS;
 416         }
 417         if (verifiedCN != null) {
 418             subject.put("CN", verifiedCN);
 419         }
 420
 421         if (pMail != null) {
 422             if (emailTemp != null) {
 423                 subject.put("EMAIL", pMail);
 424             } else {
 425                 // verify SANs should prevent this
 426                 pMail = null;
 427                 error.mergeInto(new GigiApiException("You may not include an email in this certificate."));
 428             }
 429         } else {
 430             if (emailTemp != null && emailTemp.isRequired()) {
 431                 error.mergeInto(new GigiApiException("You need to include an email in this certificate."));
 432             }
 433         }
 434
 435         if (org != null) {
 436             subject.put("O", org.getName());
 437             subject.put("C", org.getState());
 438             subject.put("ST", org.getProvince());
 439             subject.put("L", org.getCity());
 440             if (ou != null) {
 441                 subject.put("OU", ou);
 442             }
 443         }
 444         System.out.println(subject);
 445         if ( !error.isEmpty()) {
 446             throw error;
 447         }
 448         try {
 449             return new Certificate(u, subject, selectedDigest.toString(), //
 450                     this.csr, this.csrType, profile, SANs.toArray(new SubjectAlternateName[SANs.size()]));
 451         } catch (IOException e) {
 452             e.printStackTrace();
 453         }
 454         return null;
 455     }
 456
 457     private String verifyName(GigiApiException error, PropertyTemplate nameTemp, PropertyTemplate wotUserTemp, String verifiedCN) {
 458         // real names,
 459         // possible configurations: name {y,null,?}, name=WoTUser {y,null}
 460         // semantics:
 461         // y * -> real
 462         // null y -> default
 463         // null null -> null
 464         // ? y -> real, default
 465         // ? null -> real, default, null
 466         boolean realIsOK = false;
 467         boolean nullIsOK = false;
 468         boolean defaultIsOK = false;
 469         if (wotUserTemp != null && ( !wotUserTemp.isRequired() || wotUserTemp.isMultiple())) {
 470             error.mergeInto(new GigiApiException("Internal configuration error detected."));
 471         }
 472         if (nameTemp != null && nameTemp.isRequired() && !nameTemp.isMultiple()) {
 473             realIsOK = true;
 474         } else if (nameTemp == null) {
 475             defaultIsOK = wotUserTemp != null;
 476             nullIsOK = !defaultIsOK;
 477         } else if (nameTemp != null && !nameTemp.isRequired() && !nameTemp.isMultiple()) {
 478             realIsOK = true;
 479             defaultIsOK = true;
 480             nullIsOK = wotUserTemp == null;
 481         } else {
 482             error.mergeInto(new GigiApiException("Internal configuration error detected."));
 483         }
 484         if (name != null && u.isValidName(name)) {
 485             if (realIsOK) {
 486                 verifiedCN = name;
 487             } else {
 488                 error.mergeInto(new GigiApiException("Your real name is not allowed in this certificate."));
 489                 if (defaultIsOK) {
 490                     name = DEFAULT_CN;
 491                 } else if (nullIsOK) {
 492                     name = "";
 493                 }
 494             }
 495         } else if (name != null && name.equals(DEFAULT_CN)) {
 496             if (defaultIsOK) {
 497                 verifiedCN = name;
 498             } else {
 499                 error.mergeInto(new GigiApiException("The default name is not allowed in this certificate."));
 500                 if (nullIsOK) {
 501                     name = "";
 502                 } else if (realIsOK) {
 503                     name = u.getName().toString();
 504                 }
 505             }
 506         } else if (name == null || name.equals("")) {
 507             if (nullIsOK) {
 508                 verifiedCN = "";
 509             } else {
 510                 error.mergeInto(new GigiApiException("A name is required in this certificate."));
 511                 if (defaultIsOK) {
 512                     name = DEFAULT_CN;
 513                 } else if (realIsOK) {
 514                     name = u.getName().toString();
 515                 }
 516             }
 517         } else {
 518             error.mergeInto(new GigiApiException("The name you entered was invalid."));
 519
 520         }
 521         if (wotUserTemp != null) {
 522             if ( !wotUserTemp.isRequired() || wotUserTemp.isMultiple()) {
 523                 error.mergeInto(new GigiApiException("Internal configuration error detected."));
 524             }
 525             if ( !name.equals(DEFAULT_CN)) {
 526                 name = DEFAULT_CN;
 527                 error.mergeInto(new GigiApiException("You may not change the name for this certificate type."));
 528             } else {
 529                 verifiedCN = DEFAULT_CN;
 530             }
 531
 532         } else {
 533             if (nameTemp != null) {
 534                 if (name.equals("")) {
 535                     if (nameTemp.isRequired()) {
 536                         // nothing, but required
 537                         name = DEFAULT_CN;
 538                         error.mergeInto(new GigiApiException("No name entered, but one was required."));
 539                     } else {
 540                         // nothing and not required
 541
 542                     }
 543                 } else if (u.isValidName(name)) {
 544                     verifiedCN = name;
 545                 } else {
 546                     if (nameTemp.isRequired()) {
 547                         error.mergeInto(new GigiApiException("The name entered, does not match the details in your account. You cannot issue certificates with this name. Enter a name that matches the one that has been assured in your account, because a name is required for this certificate type."));
 548                     } else if (name.equals(DEFAULT_CN)) {
 549                         verifiedCN = DEFAULT_CN;
 550                     } else {
 551                         name = DEFAULT_CN;
 552                         error.mergeInto(new GigiApiException("The name entered, does not match the details in your account. You cannot issue certificates with this name. Enter a name that matches the one that has been assured in your account or keep the default name."));
 553                     }
 554                 }
 555             } else {
 556                 if ( !name.equals("")) {
 557                     name = "";
 558                     error.mergeInto(new GigiApiException("No real name is included in this certificate. The real name, you entered will be ignored."));
 559                 }
 560             }
 561         }
 562         return verifiedCN;
 563     }
 564 }