src/org/cacert/gigi/pages/account/CertificateIssueForm.java

   1 package org.cacert.gigi.pages.account;
   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.sql.SQLException;
  11 import java.util.Base64;
  12 import java.util.HashMap;
  13 import java.util.LinkedHashSet;
  14 import java.util.Map;
  15 import java.util.Set;
  16 import java.util.TreeSet;
  17
  18 import javax.servlet.http.HttpServletRequest;
  19
  20 import org.cacert.gigi.Certificate;
  21 import org.cacert.gigi.Certificate.CSRType;
  22 import org.cacert.gigi.Certificate.SANType;
  23 import org.cacert.gigi.Certificate.SubjectAlternateName;
  24 import org.cacert.gigi.CertificateProfile;
  25 import org.cacert.gigi.Digest;
  26 import org.cacert.gigi.GigiApiException;
  27 import org.cacert.gigi.User;
  28 import org.cacert.gigi.crypto.SPKAC;
  29 import org.cacert.gigi.localisation.Language;
  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     private boolean login;
 112
 113     private CertificateProfile profile = CertificateProfile.getById(1);
 114
 115     public CertificateIssueForm(HttpServletRequest hsr) {
 116         super(hsr);
 117         u = Page.getUser(hsr);
 118         spkacChallenge = RandomToken.generateToken(16);
 119     }
 120
 121     private Certificate result;
 122
 123     public Certificate getResult() {
 124         return result;
 125     }
 126
 127     @Override
 128     public boolean submit(PrintWriter out, HttpServletRequest req) {
 129         String csr = req.getParameter("CSR");
 130         String spkac = req.getParameter("SPKAC");
 131         try {
 132             try {
 133                 if (csr != null) {
 134                     byte[] data = PEM.decode("(NEW )?CERTIFICATE REQUEST", csr);
 135                     PKCS10 parsed = new PKCS10(data);
 136                     PKCS10Attributes atts = parsed.getAttributes();
 137
 138                     for (PKCS10Attribute b : atts.getAttributes()) {
 139
 140                         if ( !b.getAttributeId().equals((Object) PKCS9Attribute.EXTENSION_REQUEST_OID)) {
 141                             // unknown attrib
 142                             continue;
 143                         }
 144
 145                         for (RDN r : parsed.getSubjectName().rdns()) {
 146                             for (AVA a : r.avas()) {
 147                                 if (a.getObjectIdentifier().equals((Object) PKCS9Attribute.EMAIL_ADDRESS_OID)) {
 148                                     SANs.add(new SubjectAlternateName(SANType.EMAIL, a.getValueString()));
 149                                 } else if (a.getObjectIdentifier().equals((Object) X500Name.commonName_oid)) {
 150                                     String value = a.getValueString();
 151                                     if (value.contains(".") && !value.contains(" ")) {
 152                                         SANs.add(new SubjectAlternateName(SANType.DNS, value));
 153                                     } else {
 154                                         CN = value;
 155                                     }
 156                                 } else if (a.getObjectIdentifier().equals((Object) PKIXExtensions.SubjectAlternativeName_Id)) {
 157                                     // parse invalid SANs
 158                                 }
 159                             }
 160                         }
 161
 162                         for (Extension c : ((CertificateExtensions) b.getAttributeValue()).getAllExtensions()) {
 163                             if (c instanceof SubjectAlternativeNameExtension) {
 164
 165                                 SubjectAlternativeNameExtension san = (SubjectAlternativeNameExtension) c;
 166                                 GeneralNames obj = san.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
 167                                 for (int i = 0; i < obj.size(); i++) {
 168                                     GeneralName generalName = obj.get(i);
 169                                     GeneralNameInterface peeled = generalName.getName();
 170                                     if (peeled instanceof DNSName) {
 171                                         SANs.add(new SubjectAlternateName(SANType.DNS, ((DNSName) peeled).getName()));
 172                                     } else if (peeled instanceof RFC822Name) {
 173                                         SANs.add(new SubjectAlternateName(SANType.EMAIL, ((RFC822Name) peeled).getName()));
 174                                     }
 175                                 }
 176                             } else if (c instanceof ExtendedKeyUsageExtension) {
 177                                 ExtendedKeyUsageExtension ekue = (ExtendedKeyUsageExtension) c;
 178                                 for (String s : ekue.getExtendedKeyUsage()) {
 179                                     if (s.equals(OID_KEY_USAGE_SSL_SERVER.toString())) {
 180                                         // server
 181                                         profile = CertificateProfile.getByName("server");
 182                                     } else if (s.equals(OID_KEY_USAGE_SSL_CLIENT.toString())) {
 183                                         // client
 184                                         profile = CertificateProfile.getByName("client");
 185                                     } else if (s.equals(OID_KEY_USAGE_CODESIGN.toString())) {
 186                                         // code sign
 187                                     } else if (s.equals(OID_KEY_USAGE_EMAIL_PROTECTION.toString())) {
 188                                         // emailProtection
 189                                         profile = CertificateProfile.getByName("mail");
 190                                     } else if (s.equals(OID_KEY_USAGE_TIMESTAMP.toString())) {
 191                                         // timestamp
 192                                     } else if (s.equals(OID_KEY_USAGE_OCSP.toString())) {
 193                                         // OCSP
 194                                     }
 195                                 }
 196                             } else {
 197                                 // Unknown requested extension
 198                             }
 199                         }
 200
 201                     }
 202                     out.println(parsed.getSubjectName().getCommonName());
 203                     out.println(parsed.getSubjectName().getCountry());
 204
 205                     out.println("CSR DN: " + parsed.getSubjectName() + "<br/>");
 206                     PublicKey pk = parsed.getSubjectPublicKeyInfo();
 207                     checkKeyStrength(pk, out);
 208                     String sign = getSignatureAlgorithm(data);
 209                     guessDigest(sign);
 210
 211                     out.println("<br/>digest: " + sign + "<br/>");
 212
 213                     this.csr = csr;
 214                     this.csrType = CSRType.CSR;
 215                 } else if (spkac != null) {
 216                     String cleanedSPKAC = spkac.replaceAll("[\r\n]", "");
 217                     byte[] data = Base64.getDecoder().decode(cleanedSPKAC);
 218                     SPKAC parsed = new SPKAC(data);
 219                     if ( !parsed.getChallenge().equals(spkacChallenge)) {
 220                         throw new GigiApiException("Challenge mismatch");
 221                     }
 222                     checkKeyStrength(parsed.getPubkey(), out);
 223                     String sign = getSignatureAlgorithm(data);
 224                     guessDigest(sign);
 225                     out.println("<br/>digest: " + sign + "<br/>");
 226
 227                     // spkacChallenge
 228                     this.csr = "SPKAC=" + cleanedSPKAC;
 229                     this.csrType = CSRType.SPKAC;
 230
 231                 } else {
 232                     login = "1".equals(req.getParameter("login"));
 233                     CN = req.getParameter("CN");
 234                     String hashAlg = req.getParameter("hash_alg");
 235                     if (hashAlg != null) {
 236                         selectedDigest = Digest.valueOf(hashAlg);
 237                     }
 238                     profile = CertificateProfile.getByName(req.getParameter("profile"));
 239
 240                     String pDNS = null;
 241                     String pMail = null;
 242                     Set<SubjectAlternateName> filteredSANs = new LinkedHashSet<>();
 243                     boolean server = profile.getKeyName().equals("server");
 244                     for (SubjectAlternateName san : parseSANBox(req.getParameter("SANs"))) {
 245                         if (san.getType() == SANType.DNS) {
 246                             if (u.isValidDomain(san.getName()) && server) {
 247                                 if (pDNS == null) {
 248                                     pDNS = san.getName();
 249                                 }
 250                                 filteredSANs.add(san);
 251                                 continue;
 252                             }
 253                         } else if (san.getType() == SANType.EMAIL) {
 254                             if (u.isValidEmail(san.getName()) && !server) {
 255                                 if (pMail == null) {
 256                                     pMail = san.getName();
 257                                 }
 258                                 filteredSANs.add(san);
 259                                 continue;
 260                             }
 261                         }
 262                         outputError(out, req, "The requested Subject alternate name \"%s\" has been removed.",//
 263                                 san.getType().toString().toLowerCase() + ":" + san.getName());
 264                     }
 265                     SANs = filteredSANs;
 266                     if ( !u.isValidName(CN) && !server && !CN.equals(DEFAULT_CN)) {
 267                         CN = DEFAULT_CN;
 268                         outputError(out, req, "The real name entered cannot be verified with your account.");
 269                     }
 270
 271                     final StringBuffer subject = new StringBuffer();
 272                     if (server && pDNS != null) {
 273                         subject.append("/commonName=");
 274                         subject.append(pDNS);
 275                         if (pMail != null) {
 276                             outputError(out, req, "No email is included in this certificate.");
 277                         }
 278                         if (CN.equals("")) {
 279                             CN = "";
 280                             outputError(out, req, "No real name is included in this certificate.");
 281                         }
 282                     } else {
 283                         subject.append("/commonName=");
 284                         subject.append(CN);
 285                         if (pMail != null) {
 286                             subject.append("/emailAddress=");
 287                             subject.append(pMail);
 288                         }
 289                     }
 290                     if (req.getParameter("CCA") == null) {
 291                         outputError(out, req, "You need to accept the CCA.");
 292                     }
 293                     if (isFailed(out)) {
 294                         return false;
 295                     }
 296
 297                     result = new Certificate(LoginPage.getUser(req).getId(), subject.toString(), selectedDigest.toString(), //
 298                             this.csr, this.csrType, profile, SANs.toArray(new SubjectAlternateName[SANs.size()]));
 299                     result.issue().waitFor(60000);
 300                     return true;
 301                 }
 302             } catch (IOException e) {
 303                 e.printStackTrace();
 304             } catch (IllegalArgumentException e) {
 305                 e.printStackTrace();
 306                 throw new GigiApiException("Certificate Request format is invalid.");
 307             } catch (GeneralSecurityException e) {
 308                 e.printStackTrace();
 309                 throw new GigiApiException("Certificate Request format is invalid.");
 310             } catch (InterruptedException e) {
 311                 e.printStackTrace();
 312             } catch (SQLException e) {
 313                 throw new GigiApiException(e);
 314             }
 315         } catch (GigiApiException e) {
 316             e.format(out, Page.getLanguage(req));
 317         }
 318         return false;
 319     }
 320
 321     private void guessDigest(String sign) {
 322         if (sign.toLowerCase().startsWith("sha512")) {
 323             selectedDigest = Digest.SHA512;
 324         } else if (sign.toLowerCase().startsWith("sha384")) {
 325             selectedDigest = Digest.SHA384;
 326         }
 327     }
 328
 329     private TreeSet<SubjectAlternateName> parseSANBox(String SANs) {
 330         String[] SANparts = SANs.split("[\r\n]+|, *");
 331         TreeSet<SubjectAlternateName> parsedNames = new TreeSet<>();
 332         for (String SANline : SANparts) {
 333             String[] parts = SANline.split(":", 2);
 334             if (parts.length == 1) {
 335                 if (parts[0].trim().equals("")) {
 336                     continue;
 337                 }
 338                 if (parts[0].contains("@")) {
 339                     parsedNames.add(new SubjectAlternateName(SANType.EMAIL, parts[0]));
 340                 } else {
 341                     parsedNames.add(new SubjectAlternateName(SANType.DNS, parts[0]));
 342                 }
 343                 continue;
 344             }
 345             try {
 346                 SANType t = Certificate.SANType.valueOf(parts[0].toUpperCase());
 347                 if (t == null) {
 348                     continue;
 349                 }
 350                 parsedNames.add(new SubjectAlternateName(t, parts[1]));
 351             } catch (IllegalArgumentException e) {
 352                 // invalid enum type
 353                 continue;
 354             }
 355         }
 356         return parsedNames;
 357     }
 358
 359     private void checkKeyStrength(PublicKey pk, PrintWriter out) {
 360         out.println("Type: " + pk.getAlgorithm() + "<br/>");
 361         if (pk instanceof RSAPublicKey) {
 362             out.println("Exponent: " + ((RSAPublicKey) pk).getPublicExponent() + "<br/>");
 363             out.println("Length: " + ((RSAPublicKey) pk).getModulus().bitLength());
 364         } else if (pk instanceof DSAPublicKey) {
 365             DSAPublicKey dpk = (DSAPublicKey) pk;
 366             out.println("Length: " + dpk.getY().bitLength() + "<br/>");
 367             out.println(dpk.getParams());
 368         } else if (pk instanceof ECPublicKey) {
 369             ECPublicKey epk = (ECPublicKey) pk;
 370             out.println("Length-x: " + epk.getW().getAffineX().bitLength() + "<br/>");
 371             out.println("Length-y: " + epk.getW().getAffineY().bitLength() + "<br/>");
 372             out.println(epk.getParams().getCurve());
 373         }
 374     }
 375
 376     private static String getSignatureAlgorithm(byte[] data) throws IOException {
 377         DerInputStream in = new DerInputStream(data);
 378         DerValue[] seq = in.getSequence(3);
 379         return AlgorithmId.parse(seq[1]).getName();
 380     }
 381
 382     @Override
 383     public void output(PrintWriter out, Language l, Map<String, Object> vars) {
 384         if (csr == null) {
 385             HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 386             vars2.put("csrf", getCSRFToken());
 387             vars2.put("csrf_name", getCsrfFieldName());
 388             vars2.put("spkacChallenge", spkacChallenge);
 389             tIni.output(out, l, vars2);
 390             return;
 391         } else {
 392             super.output(out, l, vars);
 393         }
 394     }
 395
 396     @Override
 397     protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
 398         HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 399         vars2.put("CCA", "<a href='/policy/CAcertCommunityAgreement.html'>CCA</a>");
 400
 401         StringBuffer content = new StringBuffer();
 402         for (SubjectAlternateName SAN : SANs) {
 403             content.append(SAN.getType().toString().toLowerCase());
 404             content.append(':');
 405             content.append(SAN.getName());
 406             content.append('\n');
 407         }
 408
 409         vars2.put("CN", CN);
 410         vars2.put("emails", content.toString());
 411         vars2.put("hashs", new HashAlgorithms(selectedDigest));
 412         vars2.put("profiles", new IterableDataset() {
 413
 414             int i = 1;
 415
 416             @Override
 417             public boolean next(Language l, Map<String, Object> vars) {
 418                 CertificateProfile cp = CertificateProfile.getById(i++);
 419                 if (cp == null) {
 420                     return false;
 421                 }
 422                 if (cp.getId() == profile.getId()) {
 423                     vars.put("selected", " selected");
 424                 } else {
 425                     vars.put("selected", "");
 426                 }
 427                 vars.put("key", cp.getKeyName());
 428                 vars.put("name", cp.getVisibleName());
 429                 return true;
 430             }
 431         });
 432         t.output(out, l, vars2);
 433     }
 434 }