src/org/cacert/gigi/pages/account/certs/CertificateIssueForm.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.Base64;
  11 import java.util.HashMap;
  12 import java.util.LinkedHashSet;
  13 import java.util.Map;
  14 import java.util.Set;
  15 import java.util.TreeSet;
  16
  17 import javax.servlet.http.HttpServletRequest;
  18
  19 import org.cacert.gigi.GigiApiException;
  20 import org.cacert.gigi.crypto.SPKAC;
  21 import org.cacert.gigi.dbObjects.Certificate;
  22 import org.cacert.gigi.dbObjects.Certificate.CSRType;
  23 import org.cacert.gigi.dbObjects.Certificate.SANType;
  24 import org.cacert.gigi.dbObjects.Certificate.SubjectAlternateName;
  25 import org.cacert.gigi.dbObjects.CertificateProfile;
  26 import org.cacert.gigi.dbObjects.Digest;
  27 import org.cacert.gigi.dbObjects.User;
  28 import org.cacert.gigi.localisation.Language;
  29 import org.cacert.gigi.output.CertificateValiditySelector;
  30 import org.cacert.gigi.output.Form;
  31 import org.cacert.gigi.output.template.HashAlgorithms;
  32 import org.cacert.gigi.output.template.IterableDataset;
  33 import org.cacert.gigi.output.template.Template;
  34 import org.cacert.gigi.pages.LoginPage;
  35 import org.cacert.gigi.pages.Page;
  36 import org.cacert.gigi.util.PEM;
  37 import org.cacert.gigi.util.RandomToken;
  38
  39 import sun.security.pkcs.PKCS9Attribute;
  40 import sun.security.pkcs10.PKCS10;
  41 import sun.security.pkcs10.PKCS10Attribute;
  42 import sun.security.pkcs10.PKCS10Attributes;
  43 import sun.security.util.DerInputStream;
  44 import sun.security.util.DerValue;
  45 import sun.security.util.ObjectIdentifier;
  46 import sun.security.x509.AVA;
  47 import sun.security.x509.AlgorithmId;
  48 import sun.security.x509.CertificateExtensions;
  49 import sun.security.x509.DNSName;
  50 import sun.security.x509.ExtendedKeyUsageExtension;
  51 import sun.security.x509.Extension;
  52 import sun.security.x509.GeneralName;
  53 import sun.security.x509.GeneralNameInterface;
  54 import sun.security.x509.GeneralNames;
  55 import sun.security.x509.PKIXExtensions;
  56 import sun.security.x509.RDN;
  57 import sun.security.x509.RFC822Name;
  58 import sun.security.x509.SubjectAlternativeNameExtension;
  59 import sun.security.x509.X500Name;
  60
  61 /**
  62  * This class represents a form that is used for issuing certificates. This
  63  * class uses "sun.security" and therefore needs "-XDignore.symbol.file"
  64  */
  65 public class CertificateIssueForm extends Form {
  66
  67     public static final String DEFAULT_CN = "CAcert WoT User";
  68
  69     private final static Template t = new Template(CertificateIssueForm.class.getResource("CertificateIssueForm.templ"));
  70
  71     private final static Template tIni = new Template(CertificateAdd.class.getResource("RequestCertificate.templ"));
  72
  73     public static final ObjectIdentifier OID_KEY_USAGE_SSL_SERVER = ObjectIdentifier.newInternal(new int[] {
  74             1, 3, 6, 1, 5, 5, 7, 3, 1
  75     });
  76
  77     public static final ObjectIdentifier OID_KEY_USAGE_SSL_CLIENT = ObjectIdentifier.newInternal(new int[] {
  78             1, 3, 6, 1, 5, 5, 7, 3, 2
  79     });
  80
  81     public static final ObjectIdentifier OID_KEY_USAGE_CODESIGN = ObjectIdentifier.newInternal(new int[] {
  82             1, 3, 6, 1, 5, 5, 7, 3, 3
  83     });
  84
  85     public static final ObjectIdentifier OID_KEY_USAGE_EMAIL_PROTECTION = ObjectIdentifier.newInternal(new int[] {
  86             1, 3, 6, 1, 5, 5, 7, 3, 4
  87     });
  88
  89     public static final ObjectIdentifier OID_KEY_USAGE_TIMESTAMP = ObjectIdentifier.newInternal(new int[] {
  90             1, 3, 6, 1, 5, 5, 7, 3, 8
  91     });
  92
  93     public static final ObjectIdentifier OID_KEY_USAGE_OCSP = ObjectIdentifier.newInternal(new int[] {
  94             1, 3, 6, 1, 5, 5, 7, 3, 9
  95     });
  96
  97     private User u;
  98
  99     private CSRType csrType;
 100
 101     private String csr;
 102
 103     private String spkacChallenge;
 104
 105     public String CN = DEFAULT_CN;
 106
 107     private Set<SubjectAlternateName> SANs = new LinkedHashSet<>();
 108
 109     private Digest selectedDigest = Digest.getDefault();
 110
 111     CertificateValiditySelector issueDate = new CertificateValiditySelector();
 112
 113     private boolean login;
 114
 115     private CertificateProfile profile = CertificateProfile.getById(1);
 116
 117     public CertificateIssueForm(HttpServletRequest hsr) {
 118         super(hsr);
 119         u = Page.getUser(hsr);
 120         spkacChallenge = RandomToken.generateToken(16);
 121     }
 122
 123     private Certificate result;
 124
 125     public Certificate getResult() {
 126         return result;
 127     }
 128
 129     @Override
 130     public boolean submit(PrintWriter out, HttpServletRequest req) {
 131         String csr = req.getParameter("CSR");
 132         String spkac = req.getParameter("SPKAC");
 133         try {
 134             try {
 135                 if (csr != null) {
 136                     byte[] data = PEM.decode("(NEW )?CERTIFICATE REQUEST", csr);
 137                     PKCS10 parsed = new PKCS10(data);
 138                     PKCS10Attributes atts = parsed.getAttributes();
 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 (RDN r : parsed.getSubjectName().rdns()) {
 148                             for (AVA a : r.avas()) {
 149                                 if (a.getObjectIdentifier().equals((Object) PKCS9Attribute.EMAIL_ADDRESS_OID)) {
 150                                     SANs.add(new SubjectAlternateName(SANType.EMAIL, a.getValueString()));
 151                                 } else if (a.getObjectIdentifier().equals((Object) X500Name.commonName_oid)) {
 152                                     String value = a.getValueString();
 153                                     if (value.contains(".") && !value.contains(" ")) {
 154                                         SANs.add(new SubjectAlternateName(SANType.DNS, value));
 155                                     } else {
 156                                         CN = value;
 157                                     }
 158                                 } else if (a.getObjectIdentifier().equals((Object) PKIXExtensions.SubjectAlternativeName_Id)) {
 159                                     // parse invalid SANs
 160                                 }
 161                             }
 162                         }
 163
 164                         for (Extension c : ((CertificateExtensions) b.getAttributeValue()).getAllExtensions()) {
 165                             if (c instanceof SubjectAlternativeNameExtension) {
 166
 167                                 SubjectAlternativeNameExtension san = (SubjectAlternativeNameExtension) c;
 168                                 GeneralNames obj = san.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
 169                                 for (int i = 0; i < obj.size(); i++) {
 170                                     GeneralName generalName = obj.get(i);
 171                                     GeneralNameInterface peeled = generalName.getName();
 172                                     if (peeled instanceof DNSName) {
 173                                         SANs.add(new SubjectAlternateName(SANType.DNS, ((DNSName) peeled).getName()));
 174                                     } else if (peeled instanceof RFC822Name) {
 175                                         SANs.add(new SubjectAlternateName(SANType.EMAIL, ((RFC822Name) peeled).getName()));
 176                                     }
 177                                 }
 178                             } else if (c instanceof ExtendedKeyUsageExtension) {
 179                                 ExtendedKeyUsageExtension ekue = (ExtendedKeyUsageExtension) c;
 180                                 for (String s : ekue.getExtendedKeyUsage()) {
 181                                     if (s.equals(OID_KEY_USAGE_SSL_SERVER.toString())) {
 182                                         // server
 183                                         profile = CertificateProfile.getByName("server");
 184                                     } else if (s.equals(OID_KEY_USAGE_SSL_CLIENT.toString())) {
 185                                         // client
 186                                         profile = CertificateProfile.getByName("client");
 187                                     } else if (s.equals(OID_KEY_USAGE_CODESIGN.toString())) {
 188                                         // code sign
 189                                     } else if (s.equals(OID_KEY_USAGE_EMAIL_PROTECTION.toString())) {
 190                                         // emailProtection
 191                                         profile = CertificateProfile.getByName("mail");
 192                                     } else if (s.equals(OID_KEY_USAGE_TIMESTAMP.toString())) {
 193                                         // timestamp
 194                                     } else if (s.equals(OID_KEY_USAGE_OCSP.toString())) {
 195                                         // OCSP
 196                                     }
 197                                 }
 198                             } else {
 199                                 // Unknown requested extension
 200                             }
 201                         }
 202
 203                     }
 204                     out.println(parsed.getSubjectName().getCommonName());
 205                     out.println(parsed.getSubjectName().getCountry());
 206
 207                     out.println("CSR DN: " + parsed.getSubjectName() + "<br/>");
 208                     PublicKey pk = parsed.getSubjectPublicKeyInfo();
 209                     checkKeyStrength(pk, out);
 210                     String sign = getSignatureAlgorithm(data);
 211                     guessDigest(sign);
 212
 213                     out.println("<br/>digest: " + sign + "<br/>");
 214
 215                     this.csr = csr;
 216                     this.csrType = CSRType.CSR;
 217                 } else if (spkac != null) {
 218                     String cleanedSPKAC = spkac.replaceAll("[\r\n]", "");
 219                     byte[] data = Base64.getDecoder().decode(cleanedSPKAC);
 220                     SPKAC parsed = new SPKAC(data);
 221                     if ( !parsed.getChallenge().equals(spkacChallenge)) {
 222                         throw new GigiApiException("Challenge mismatch");
 223                     }
 224                     checkKeyStrength(parsed.getPubkey(), out);
 225                     String sign = getSignatureAlgorithm(data);
 226                     guessDigest(sign);
 227                     out.println("<br/>digest: " + sign + "<br/>");
 228
 229                     // spkacChallenge
 230                     this.csr = "SPKAC=" + cleanedSPKAC;
 231                     this.csrType = CSRType.SPKAC;
 232
 233                 } else {
 234                     login = "1".equals(req.getParameter("login"));
 235                     issueDate.update(req);
 236                     CN = req.getParameter("CN");
 237                     String hashAlg = req.getParameter("hash_alg");
 238                     if (hashAlg != null) {
 239                         selectedDigest = Digest.valueOf(hashAlg);
 240                     }
 241                     profile = CertificateProfile.getByName(req.getParameter("profile"));
 242
 243                     String pDNS = null;
 244                     String pMail = null;
 245                     Set<SubjectAlternateName> filteredSANs = new LinkedHashSet<>();
 246                     boolean server = profile.getKeyName().equals("server");
 247                     for (SubjectAlternateName san : parseSANBox(req.getParameter("SANs"))) {
 248                         if (san.getType() == SANType.DNS) {
 249                             if (u.isValidDomain(san.getName()) && server) {
 250                                 if (pDNS == null) {
 251                                     pDNS = san.getName();
 252                                 }
 253                                 filteredSANs.add(san);
 254                                 continue;
 255                             }
 256                         } else if (san.getType() == SANType.EMAIL) {
 257                             if (u.isValidEmail(san.getName()) && !server) {
 258                                 if (pMail == null) {
 259                                     pMail = san.getName();
 260                                 }
 261                                 filteredSANs.add(san);
 262                                 continue;
 263                             }
 264                         }
 265                         outputError(out, req, "The requested Subject alternate name \"%s\" has been removed.",//
 266                                 san.getType().toString().toLowerCase() + ":" + san.getName());
 267                     }
 268                     SANs = filteredSANs;
 269                     if ( !u.isValidName(CN) && !server && !CN.equals(DEFAULT_CN)) {
 270                         CN = DEFAULT_CN;
 271                         outputError(out, req, "The real name entered cannot be verified with your account.");
 272                     }
 273
 274                     final StringBuffer subject = new StringBuffer();
 275                     if (server && pDNS != null) {
 276                         subject.append("/commonName=");
 277                         subject.append(pDNS);
 278                         if (pMail != null) {
 279                             outputError(out, req, "No email is included in this certificate.");
 280                         }
 281                         if (CN.equals("")) {
 282                             CN = "";
 283                             outputError(out, req, "No real name is included in this certificate.");
 284                         }
 285                     } else {
 286                         subject.append("/commonName=");
 287                         subject.append(CN);
 288                         if (pMail != null) {
 289                             subject.append("/emailAddress=");
 290                             subject.append(pMail);
 291                         }
 292                     }
 293                     if (req.getParameter("CCA") == null) {
 294                         outputError(out, req, "You need to accept the CCA.");
 295                     }
 296                     if (isFailed(out)) {
 297                         return false;
 298                     }
 299
 300                     result = new Certificate(LoginPage.getUser(req).getId(), subject.toString(), selectedDigest.toString(), //
 301                             this.csr, this.csrType, profile, SANs.toArray(new SubjectAlternateName[SANs.size()]));
 302                     result.issue(issueDate.getFrom(), issueDate.getTo()).waitFor(60000);
 303                     return true;
 304                 }
 305             } catch (IOException e) {
 306                 e.printStackTrace();
 307             } catch (IllegalArgumentException e) {
 308                 e.printStackTrace();
 309                 throw new GigiApiException("Certificate Request format is invalid.");
 310             } catch (GeneralSecurityException e) {
 311                 e.printStackTrace();
 312                 throw new GigiApiException("Certificate Request format is invalid.");
 313             } catch (InterruptedException e) {
 314                 e.printStackTrace();
 315             }
 316         } catch (GigiApiException e) {
 317             e.format(out, Page.getLanguage(req));
 318         }
 319         return false;
 320     }
 321
 322     private void guessDigest(String sign) {
 323         if (sign.toLowerCase().startsWith("sha512")) {
 324             selectedDigest = Digest.SHA512;
 325         } else if (sign.toLowerCase().startsWith("sha384")) {
 326             selectedDigest = Digest.SHA384;
 327         }
 328     }
 329
 330     private TreeSet<SubjectAlternateName> parseSANBox(String SANs) {
 331         String[] SANparts = SANs.split("[\r\n]+|, *");
 332         TreeSet<SubjectAlternateName> parsedNames = new TreeSet<>();
 333         for (String SANline : SANparts) {
 334             String[] parts = SANline.split(":", 2);
 335             if (parts.length == 1) {
 336                 if (parts[0].trim().equals("")) {
 337                     continue;
 338                 }
 339                 if (parts[0].contains("@")) {
 340                     parsedNames.add(new SubjectAlternateName(SANType.EMAIL, parts[0]));
 341                 } else {
 342                     parsedNames.add(new SubjectAlternateName(SANType.DNS, parts[0]));
 343                 }
 344                 continue;
 345             }
 346             try {
 347                 SANType t = Certificate.SANType.valueOf(parts[0].toUpperCase());
 348                 if (t == null) {
 349                     continue;
 350                 }
 351                 parsedNames.add(new SubjectAlternateName(t, parts[1]));
 352             } catch (IllegalArgumentException e) {
 353                 // invalid enum type
 354                 continue;
 355             }
 356         }
 357         return parsedNames;
 358     }
 359
 360     private void checkKeyStrength(PublicKey pk, PrintWriter out) {
 361         out.println("Type: " + pk.getAlgorithm() + "<br/>");
 362         if (pk instanceof RSAPublicKey) {
 363             out.println("Exponent: " + ((RSAPublicKey) pk).getPublicExponent() + "<br/>");
 364             out.println("Length: " + ((RSAPublicKey) pk).getModulus().bitLength());
 365         } else if (pk instanceof DSAPublicKey) {
 366             DSAPublicKey dpk = (DSAPublicKey) pk;
 367             out.println("Length: " + dpk.getY().bitLength() + "<br/>");
 368             out.println(dpk.getParams());
 369         } else if (pk instanceof ECPublicKey) {
 370             ECPublicKey epk = (ECPublicKey) pk;
 371             out.println("Length-x: " + epk.getW().getAffineX().bitLength() + "<br/>");
 372             out.println("Length-y: " + epk.getW().getAffineY().bitLength() + "<br/>");
 373             out.println(epk.getParams().getCurve());
 374         }
 375     }
 376
 377     private static String getSignatureAlgorithm(byte[] data) throws IOException {
 378         DerInputStream in = new DerInputStream(data);
 379         DerValue[] seq = in.getSequence(3);
 380         return AlgorithmId.parse(seq[1]).getName();
 381     }
 382
 383     @Override
 384     public void output(PrintWriter out, Language l, Map<String, Object> vars) {
 385         if (csr == null) {
 386             HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 387             vars2.put("csrf", getCSRFToken());
 388             vars2.put("csrf_name", getCsrfFieldName());
 389             vars2.put("spkacChallenge", spkacChallenge);
 390             tIni.output(out, l, vars2);
 391             return;
 392         } else {
 393             super.output(out, l, vars);
 394         }
 395     }
 396
 397     @Override
 398     protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
 399         HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 400         vars2.put("CCA", "<a href='/policy/CAcertCommunityAgreement.html'>CCA</a>");
 401
 402         StringBuffer content = new StringBuffer();
 403         for (SubjectAlternateName SAN : SANs) {
 404             content.append(SAN.getType().toString().toLowerCase());
 405             content.append(':');
 406             content.append(SAN.getName());
 407             content.append('\n');
 408         }
 409
 410         vars2.put("CN", CN);
 411         vars2.put("validity", issueDate);
 412         vars2.put("emails", content.toString());
 413         vars2.put("hashs", new HashAlgorithms(selectedDigest));
 414         vars2.put("profiles", new IterableDataset() {
 415
 416             int i = 1;
 417
 418             @Override
 419             public boolean next(Language l, Map<String, Object> vars) {
 420                 CertificateProfile cp = CertificateProfile.getById(i++);
 421                 if (cp == null) {
 422                     return false;
 423                 }
 424                 if (cp.getId() == profile.getId()) {
 425                     vars.put("selected", " selected");
 426                 } else {
 427                     vars.put("selected", "");
 428                 }
 429                 vars.put("key", cp.getKeyName());
 430                 vars.put("name", cp.getVisibleName());
 431                 return true;
 432             }
 433         });
 434         t.output(out, l, vars2);
 435     }
 436 }