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