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.x509.AVA;
  46 import sun.security.x509.AlgorithmId;
  47 import sun.security.x509.CertificateExtensions;
  48 import sun.security.x509.DNSName;
  49 import sun.security.x509.ExtendedKeyUsageExtension;
  50 import sun.security.x509.Extension;
  51 import sun.security.x509.GeneralName;
  52 import sun.security.x509.GeneralNameInterface;
  53 import sun.security.x509.GeneralNames;
  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 /**
  60  * This class represents a form that is used for issuing certificates. This
  61  * class uses "sun.security" and therefore needs "-XDignore.symbol.file"
  62  */
  63 public class CertificateIssueForm extends Form {
  64
  65     private static final String DEFAULT_CN = "CAcert WoT User";
  66
  67     private final static Template t = new Template(CertificateIssueForm.class.getResource("CertificateIssueForm.templ"));
  68
  69     private final static Template tIni = new Template(CertificateAdd.class.getResource("RequestCertificate.templ"));
  70
  71     User u;
  72
  73     private CSRType csrType;
  74
  75     String csr;
  76
  77     String spkacChallenge;
  78
  79     String CN = DEFAULT_CN;
  80
  81     Set<SubjectAlternateName> SANs = new LinkedHashSet<>();
  82
  83     Digest selectedDigest = Digest.getDefault();
  84
  85     boolean login;
  86
  87     public CertificateIssueForm(HttpServletRequest hsr) {
  88         super(hsr);
  89         u = Page.getUser(hsr);
  90         spkacChallenge = RandomToken.generateToken(16);
  91     }
  92
  93     Certificate result;
  94
  95     public Certificate getResult() {
  96         return result;
  97     }
  98
  99     @Override
 100     public boolean submit(PrintWriter out, HttpServletRequest req) {
 101         String csr = req.getParameter("CSR");
 102         String spkac = req.getParameter("SPKAC");
 103         try {
 104             try {
 105                 if (csr != null) {
 106                     byte[] data = PEM.decode("(NEW )?CERTIFICATE REQUEST", csr);
 107                     PKCS10 parsed = new PKCS10(data);
 108                     PKCS10Attributes atts = parsed.getAttributes();
 109
 110                     for (PKCS10Attribute b : atts.getAttributes()) {
 111
 112                         if ( !b.getAttributeId().equals((Object) PKCS9Attribute.EXTENSION_REQUEST_OID)) {
 113                             // unknown attrib
 114                             continue;
 115                         }
 116
 117                         for (RDN r : parsed.getSubjectName().rdns()) {
 118                             for (AVA a : r.avas()) {
 119                                 if (a.getObjectIdentifier().equals((Object) PKCS9Attribute.EMAIL_ADDRESS_OID)) {
 120                                     SANs.add(new SubjectAlternateName(SANType.EMAIL, a.getValueString()));
 121                                 } else if (a.getObjectIdentifier().equals((Object) X500Name.commonName_oid)) {
 122                                     CN = a.getValueString();
 123                                 }
 124                             }
 125                         }
 126
 127                         for (Extension c : ((CertificateExtensions) b.getAttributeValue()).getAllExtensions()) {
 128                             if (c instanceof SubjectAlternativeNameExtension) {
 129
 130                                 SubjectAlternativeNameExtension san = (SubjectAlternativeNameExtension) c;
 131                                 GeneralNames obj = san.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
 132                                 for (int i = 0; i < obj.size(); i++) {
 133                                     GeneralName generalName = obj.get(i);
 134                                     GeneralNameInterface peeled = generalName.getName();
 135                                     if (peeled instanceof DNSName) {
 136                                         SANs.add(new SubjectAlternateName(SANType.DNS, ((DNSName) peeled).getName()));
 137                                     } else if (peeled instanceof RFC822Name) {
 138                                         SANs.add(new SubjectAlternateName(SANType.EMAIL, ((RFC822Name) peeled).getName()));
 139                                     }
 140                                 }
 141                             } else if (c instanceof ExtendedKeyUsageExtension) {
 142                                 ExtendedKeyUsageExtension ekue = (ExtendedKeyUsageExtension) c;
 143                                 for (String s : ekue.getExtendedKeyUsage()) {
 144                                     if (s.equals("1.3.6.1.5.5.7.3.1")) {
 145                                         // server
 146                                     } else if (s.equals("1.3.6.1.5.5.7.3.2")) {
 147                                         // client
 148                                     } else if (s.equals("1.3.6.1.5.5.7.3.3")) {
 149                                         // code sign
 150                                     } else if (s.equals("1.3.6.1.5.5.7.3.4")) {
 151                                         // emailProtection
 152                                     } else if (s.equals("1.3.6.1.5.5.7.3.8")) {
 153                                         // timestamp
 154                                     } else if (s.equals("1.3.6.1.5.5.7.3.9")) {
 155                                         // OCSP
 156                                     }
 157                                 }
 158                             } else {
 159                                 // Unknown requested extension
 160                             }
 161                         }
 162
 163                     }
 164                     out.println(parsed.getSubjectName().getCommonName());
 165                     out.println(parsed.getSubjectName().getCountry());
 166
 167                     out.println("CSR DN: " + parsed.getSubjectName() + "<br/>");
 168                     PublicKey pk = parsed.getSubjectPublicKeyInfo();
 169                     checkKeyStrength(pk, out);
 170                     String sign = getSignatureAlgorithm(data);
 171                     out.println("<br/>digest: " + sign + "<br/>");
 172
 173                     this.csr = csr;
 174                     this.csrType = CSRType.CSR;
 175                 } else if (spkac != null) {
 176                     String cleanedSPKAC = spkac.replaceAll("[\r\n]", "");
 177                     byte[] data = Base64.getDecoder().decode(cleanedSPKAC);
 178                     SPKAC parsed = new SPKAC(data);
 179                     if ( !parsed.getChallenge().equals(spkacChallenge)) {
 180                         throw new GigiApiException("Challenge mismatch");
 181                     }
 182                     checkKeyStrength(parsed.getPubkey(), out);
 183                     String sign = getSignatureAlgorithm(data);
 184                     out.println("<br/>digest: " + sign + "<br/>");
 185
 186                     // spkacChallenge
 187                     this.csr = "SPKAC=" + cleanedSPKAC;
 188                     this.csrType = CSRType.SPKAC;
 189
 190                 } else {
 191                     login = "1".equals(req.getParameter("login"));
 192                     CN = req.getParameter("CN");
 193                     String hashAlg = req.getParameter("hash_alg");
 194                     if (hashAlg != null) {
 195                         selectedDigest = Digest.valueOf(hashAlg);
 196                     }
 197                     CertificateProfile profile = CertificateProfile.getByName(req.getParameter("profile"));
 198
 199                     Set<SubjectAlternateName> filteredSANs = new LinkedHashSet<>();
 200                     for (SubjectAlternateName san : parseSANBox(req.getParameter("SANs"))) {
 201                         if (san.getType() == SANType.DNS) {
 202                             if (u.isValidDomain(san.getName())) {
 203                                 filteredSANs.add(san);
 204                                 continue;
 205                             }
 206                         } else if (san.getType() == SANType.EMAIL) {
 207                             if (u.isValidEmail(san.getName())) {
 208                                 filteredSANs.add(san);
 209                                 continue;
 210                             }
 211                         }
 212                         // SAN blocked
 213                     }
 214                     SANs = filteredSANs;
 215
 216                     if (req.getParameter("CCA") == null) {
 217                         outputError(out, req, "You need to accept the CCA.");
 218                         return false;
 219                     }
 220
 221                     result = new Certificate(LoginPage.getUser(req).getId(), "/commonName=CAcert WoT User", selectedDigest.toString(), //
 222                             this.csr, this.csrType, profile, SANs.toArray(new SubjectAlternateName[SANs.size()]));
 223                     result.issue().waitFor(60000);
 224                     return true;
 225                 }
 226             } catch (IOException e) {
 227                 e.printStackTrace();
 228             } catch (IllegalArgumentException e) {
 229                 throw new GigiApiException("Certificate Request format is invalid.");
 230             } catch (GeneralSecurityException e) {
 231                 throw new GigiApiException("Certificate Request format is invalid.");
 232             } catch (InterruptedException e) {
 233                 e.printStackTrace();
 234             } catch (SQLException e) {
 235                 throw new GigiApiException(e);
 236             }
 237         } catch (GigiApiException e) {
 238             e.format(out, Page.getLanguage(req));
 239         }
 240         return false;
 241     }
 242
 243     private TreeSet<SubjectAlternateName> parseSANBox(String SANs) {
 244         String[] SANparts = SANs.split("[\r\n]+");
 245         TreeSet<SubjectAlternateName> parsedNames = new TreeSet<>();
 246         for (String SANline : SANparts) {
 247             String[] parts = SANline.split(":", 2);
 248             SANType t = Certificate.SANType.valueOf(parts[0].toUpperCase());
 249             if (t == null || parts.length == 1) {
 250                 continue;
 251             }
 252             parsedNames.add(new SubjectAlternateName(t, parts[1]));
 253         }
 254         return parsedNames;
 255     }
 256
 257     private void checkKeyStrength(PublicKey pk, PrintWriter out) {
 258         out.println("Type: " + pk.getAlgorithm() + "<br/>");
 259         if (pk instanceof RSAPublicKey) {
 260             out.println("Exponent: " + ((RSAPublicKey) pk).getPublicExponent() + "<br/>");
 261             out.println("Length: " + ((RSAPublicKey) pk).getModulus().bitLength());
 262         } else if (pk instanceof DSAPublicKey) {
 263             DSAPublicKey dpk = (DSAPublicKey) pk;
 264             out.println("Length: " + dpk.getY().bitLength() + "<br/>");
 265             out.println(dpk.getParams());
 266         } else if (pk instanceof ECPublicKey) {
 267             ECPublicKey epk = (ECPublicKey) pk;
 268             out.println("Length-x: " + epk.getW().getAffineX().bitLength() + "<br/>");
 269             out.println("Length-y: " + epk.getW().getAffineY().bitLength() + "<br/>");
 270             out.println(epk.getParams().getCurve());
 271         }
 272     }
 273
 274     private static String getSignatureAlgorithm(byte[] data) throws IOException {
 275         DerInputStream in = new DerInputStream(data);
 276         DerValue[] seq = in.getSequence(3);
 277         return AlgorithmId.parse(seq[1]).getName();
 278     }
 279
 280     @Override
 281     public void output(PrintWriter out, Language l, Map<String, Object> vars) {
 282         if (csr == null) {
 283             HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 284             vars2.put("csrf", getCSRFToken());
 285             vars2.put("csrf_name", getCsrfFieldName());
 286             vars2.put("spkacChallenge", spkacChallenge);
 287             tIni.output(out, l, vars2);
 288             return;
 289         } else {
 290             super.output(out, l, vars);
 291         }
 292     }
 293
 294     @Override
 295     protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
 296         HashMap<String, Object> vars2 = new HashMap<String, Object>(vars);
 297         vars2.put("CCA", "<a href='/policy/CAcertCommunityAgreement.html'>CCA</a>");
 298
 299         StringBuffer content = new StringBuffer();
 300         for (SubjectAlternateName SAN : SANs) {
 301             content.append(SAN.getType().toString().toLowerCase());
 302             content.append(':');
 303             content.append(SAN.getName());
 304             content.append('\n');
 305         }
 306
 307         vars2.put("CN", CN);
 308         vars2.put("emails", content.toString());
 309         vars2.put("hashs", new HashAlgorithms(selectedDigest));
 310         vars2.put("profiles", new IterableDataset() {
 311
 312             int i = 1;
 313
 314             @Override
 315             public boolean next(Language l, Map<String, Object> vars) {
 316                 CertificateProfile cp = CertificateProfile.getById(i++);
 317                 if (cp == null) {
 318                     return false;
 319                 }
 320                 vars.put("key", cp.getKeyName());
 321                 vars.put("name", cp.getVisibleName());
 322                 return true;
 323             }
 324         });
 325         t.output(out, l, vars2);
 326     }
 327 }