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                     if ( !u.canIssue(profile)) {
 243                         profile = CertificateProfile.getById(1);
 244                         outputError(out, req, "Certificate Profile is invalid.");
 245                         return false;
 246                     }
 247
 248                     String pDNS = null;
 249                     String pMail = null;
 250                     Set<SubjectAlternateName> filteredSANs = new LinkedHashSet<>();
 251                     boolean server = profile.getKeyName().equals("server");
 252                     for (SubjectAlternateName san : parseSANBox(req.getParameter("SANs"))) {
 253                         if (san.getType() == SANType.DNS) {
 254                             if (u.isValidDomain(san.getName()) && server) {
 255                                 if (pDNS == null) {
 256                                     pDNS = san.getName();
 257                                 }
 258                                 filteredSANs.add(san);
 259                                 continue;
 260                             }
 261                         } else if (san.getType() == SANType.EMAIL) {
 262                             if (u.isValidEmail(san.getName()) && !server) {
 263                                 if (pMail == null) {
 264                                     pMail = san.getName();
 265                                 }
 266                                 filteredSANs.add(san);
 267                                 continue;
 268                             }
 269                         }
 270                         outputError(out, req, "The requested Subject alternate name \"%s\" has been removed.",//
 271                                 san.getType().toString().toLowerCase() + ":" + san.getName());
 272                     }
 273                     SANs = filteredSANs;
 274                     if ( !u.isValidName(CN) && !server && !CN.equals(DEFAULT_CN)) {
 275                         CN = DEFAULT_CN;
 276                         outputError(out, req, "The real name entered cannot be verified with your account.");
 277                     }
 278
 279                     final StringBuffer subject = new StringBuffer();
 280                     if (server && pDNS != null) {
 281                         subject.append("/commonName=");
 282                         subject.append(pDNS);
 283                         if (pMail != null) {
 284                             outputError(out, req, "No email is included in this certificate.");
 285                         }
 286                         if (CN.equals("")) {
 287                             CN = "";
 288                             outputError(out, req, "No real name is included in this certificate.");
 289                         }
 290                     } else {
 291                         subject.append("/commonName=");
 292                         subject.append(CN);
 293                         if (pMail != null) {
 294                             subject.append("/emailAddress=");
 295                             subject.append(pMail);
 296                         }
 297                     }
 298                     if (req.getParameter("CCA") == null) {
 299                         outputError(out, req, "You need to accept the CCA.");
 300                     }
 301                     if (isFailed(out)) {
 302                         return false;
 303                     }
 304
 305                     result = new Certificate(LoginPage.getUser(req), subject.toString(), selectedDigest.toString(), //
 306                             this.csr, this.csrType, profile, SANs.toArray(new SubjectAlternateName[SANs.size()]));
 307                     result.issue(issueDate.getFrom(), issueDate.getTo()).waitFor(60000);
 308                     return true;
 309                 }
 310             } catch (IOException e) {
 311                 e.printStackTrace();
 312             } catch (IllegalArgumentException e) {
 313                 e.printStackTrace();
 314                 throw new GigiApiException("Certificate Request format is invalid.");
 315             } catch (GeneralSecurityException e) {
 316                 e.printStackTrace();
 317                 throw new GigiApiException("Certificate Request format is invalid.");
 318             } catch (InterruptedException e) {
 319                 e.printStackTrace();
 320             }
 321         } catch (GigiApiException e) {
 322             e.format(out, Page.getLanguage(req));
 323         }
 324         return false;
 325     }
 326
 327     private void guessDigest(String sign) {
 328         if (sign.toLowerCase().startsWith("sha512")) {
 329             selectedDigest = Digest.SHA512;
 330         } else if (sign.toLowerCase().startsWith("sha384")) {
 331             selectedDigest = Digest.SHA384;
 332         }
 333     }
 334
 335     private TreeSet<SubjectAlternateName> parseSANBox(String SANs) {
 336         String[] SANparts = SANs.split("[\r\n]+|, *");
 337         TreeSet<SubjectAlternateName> parsedNames = new TreeSet<>();
 338         for (String SANline : SANparts) {
 339             String[] parts = SANline.split(":", 2);
 340             if (parts.length == 1) {
 341                 if (parts[0].trim().equals("")) {
 342                     continue;
 343                 }
 344                 if (parts[0].contains("@")) {
 345                     parsedNames.add(new SubjectAlternateName(SANType.EMAIL, parts[0]));
 346                 } else {
 347                     parsedNames.add(new SubjectAlternateName(SANType.DNS, parts[0]));
 348                 }
 349                 continue;
 350             }
 351             try {
 352                 SANType t = Certificate.SANType.valueOf(parts[0].toUpperCase());
 353                 if (t == null) {
 354                     continue;
 355                 }
 356                 parsedNames.add(new SubjectAlternateName(t, parts[1]));
 357             } catch (IllegalArgumentException e) {
 358                 // invalid enum type
 359                 continue;
 360             }
 361         }
 362         return parsedNames;
 363     }
 364
 365     private void checkKeyStrength(PublicKey pk, PrintWriter out) {
 366         out.println("Type: " + pk.getAlgorithm() + "<br/>");
 367         if (pk instanceof RSAPublicKey) {
 368             out.println("Exponent: " + ((RSAPublicKey) pk).getPublicExponent() + "<br/>");
 369             out.println("Length: " + ((RSAPublicKey) pk).getModulus().bitLength());
 370         } else if (pk instanceof DSAPublicKey) {
 371             DSAPublicKey dpk = (DSAPublicKey) pk;
 372             out.println("Length: " + dpk.getY().bitLength() + "<br/>");
 373             out.println(dpk.getParams());
 374         } else if (pk instanceof ECPublicKey) {
 375             ECPublicKey epk = (ECPublicKey) pk;
 376             out.println("Length-x: " + epk.getW().getAffineX().bitLength() + "<br/>");
 377             out.println("Length-y: " + epk.getW().getAffineY().bitLength() + "<br/>");
 378             out.println(epk.getParams().getCurve());
 379         }
 380     }
 381
 382     private static String getSignatureAlgorithm(byte[] data) throws IOException {
 383         DerInputStream in = new DerInputStream(data);
 384         DerValue[] seq = in.getSequence(3);
 385         return AlgorithmId.parse(seq[1]).getName();
 386     }
 387
 388     @Override
 389     public void output(PrintWriter out, Language l, Map<String, Object> vars) {
 390         if (csr == null) {
 391             HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 392             vars2.put("csrf", getCSRFToken());
 393             vars2.put("csrf_name", getCsrfFieldName());
 394             vars2.put("spkacChallenge", spkacChallenge);
 395             tIni.output(out, l, vars2);
 396             return;
 397         } else {
 398             super.output(out, l, vars);
 399         }
 400     }
 401
 402     @Override
 403     protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
 404         HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 405         vars2.put("CCA", "<a href='/policy/CAcertCommunityAgreement.html'>CCA</a>");
 406
 407         StringBuffer content = new StringBuffer();
 408         for (SubjectAlternateName SAN : SANs) {
 409             content.append(SAN.getType().toString().toLowerCase());
 410             content.append(':');
 411             content.append(SAN.getName());
 412             content.append('\n');
 413         }
 414
 415         vars2.put("CN", CN);
 416         vars2.put("validity", issueDate);
 417         vars2.put("emails", content.toString());
 418         vars2.put("hashs", new HashAlgorithms(selectedDigest));
 419         vars2.put("profiles", new IterableDataset() {
 420
 421             int i = 1;
 422
 423             @Override
 424             public boolean next(Language l, Map<String, Object> vars) {
 425                 CertificateProfile cp;
 426                 do {
 427                     cp = CertificateProfile.getById(i++);
 428                     if (cp == null) {
 429                         return false;
 430                     }
 431                 } while ( !u.canIssue(cp));
 432
 433                 if (cp.getId() == profile.getId()) {
 434                     vars.put("selected", " selected");
 435                 } else {
 436                     vars.put("selected", "");
 437                 }
 438                 vars.put("key", cp.getKeyName());
 439                 vars.put("name", cp.getVisibleName());
 440                 return true;
 441             }
 442         });
 443         t.output(out, l, vars2);
 444     }
 445 }