src/org/cacert/gigi/util/CertExporter.java

   1 package org.cacert.gigi.util;
   2
   3 import java.io.IOException;
   4 import java.math.BigInteger;
   5 import java.security.GeneralSecurityException;
   6 import java.security.cert.CRLException;
   7 import java.security.cert.CertificateEncodingException;
   8 import java.security.cert.CertificateException;
   9 import java.security.cert.X509CRL;
  10 import java.security.cert.X509Certificate;
  11 import java.util.HashSet;
  12 import java.util.LinkedList;
  13 import java.util.Set;
  14
  15 import javax.servlet.ServletOutputStream;
  16
  17 import org.cacert.gigi.dbObjects.CACertificate;
  18 import org.cacert.gigi.dbObjects.Certificate;
  19
  20 import sun.security.pkcs.ContentInfo;
  21 import sun.security.pkcs.PKCS7;
  22 import sun.security.pkcs.SignerInfo;
  23 import sun.security.util.DerOutputStream;
  24 import sun.security.util.DerValue;
  25 import sun.security.x509.AlgorithmId;
  26 import sun.security.x509.X509CRLImpl;
  27 import sun.security.x509.X509CertImpl;
  28
  29 public class CertExporter {
  30
  31     private CertExporter() {}
  32
  33     public static void writeCertCrt(Certificate c, ServletOutputStream out, boolean doChain, boolean includeAnchor) throws IOException, GeneralSecurityException {
  34         X509Certificate cert = c.cert();
  35         out.println(PEM.encode("CERTIFICATE", cert.getEncoded()));
  36         if (doChain) {
  37             CACertificate ca = c.getParent();
  38             while ( !ca.isSelfsigned()) {
  39                 out.println(PEM.encode("CERTIFICATE", ca.getCertificate().getEncoded()));
  40                 ca = ca.getParent();
  41             }
  42             if (includeAnchor) {
  43                 out.println(PEM.encode("CERTIFICATE", ca.getCertificate().getEncoded()));
  44             }
  45         }
  46     }
  47
  48     public static void writeCertCer(Certificate c, ServletOutputStream out, boolean doChain, boolean includeAnchor) throws IOException, GeneralSecurityException {
  49         X509Certificate cert = c.cert();
  50         if (doChain) {
  51             PKCS7 p7 = toP7Chain(c);
  52             p7.encodeSignedData(out);
  53         } else {
  54             out.write(cert.getEncoded());
  55         }
  56     }
  57
  58     private static PKCS7 toP7Chain(Certificate c) throws IOException, GeneralSecurityException {
  59         LinkedList<X509Certificate> ll = getChain(c);
  60         PKCS7 p7 = new PKCS7(new AlgorithmId[0], new ContentInfo(ContentInfo.DATA_OID, null), ll.toArray(new X509Certificate[ll.size()]), new SignerInfo[0]) {
  61
  62             @Override
  63             public void encodeSignedData(DerOutputStream out) throws IOException {
  64                 DerOutputStream signedData = new DerOutputStream();
  65                 BigInteger version = getVersion();
  66                 AlgorithmId[] digestAlgorithmIds = getDigestAlgorithmIds();
  67                 ContentInfo contentInfo = getContentInfo();
  68                 X509Certificate[] certificates = getCertificates();
  69                 X509CRL[] crls = getCRLs();
  70                 SignerInfo[] signerInfos = getSignerInfos();
  71
  72                 // version
  73                 signedData.putInteger(version);
  74
  75                 // digestAlgorithmIds
  76                 signedData.putOrderedSetOf(DerValue.tag_Set, digestAlgorithmIds);
  77
  78                 // contentInfo
  79                 contentInfo.encode(signedData);
  80
  81                 // certificates (optional)
  82                 if (certificates != null && certificates.length != 0) {
  83                     DerOutputStream sub = new DerOutputStream();
  84                     // cast to X509CertImpl[] since X509CertImpl implements
  85                     // DerEncoder
  86                     X509CertImpl implCerts[] = new X509CertImpl[certificates.length];
  87                     for (int i = 0; i < certificates.length; i++) {
  88                         try {
  89                             sub.write(certificates[i].getEncoded());
  90                         } catch (CertificateEncodingException e) {
  91                             sub.close();
  92                             throw new IOException(e);
  93                         }
  94                         if (certificates[i] instanceof X509CertImpl) {
  95                             implCerts[i] = (X509CertImpl) certificates[i];
  96                         } else {
  97                             try {
  98                                 byte[] encoded = certificates[i].getEncoded();
  99                                 implCerts[i] = new X509CertImpl(encoded);
 100                             } catch (CertificateException ce) {
 101                                 sub.close();
 102                                 throw new IOException(ce);
 103                             }
 104                         }
 105                     }
 106
 107                     // Add the certificate set (tagged with [0] IMPLICIT)
 108                     // to the signed data
 109                     signedData.write((byte) 0xA0, sub);
 110                     sub.close();
 111                 }
 112
 113                 // CRLs (optional)
 114                 if (crls != null && crls.length != 0) {
 115                     // cast to X509CRLImpl[] since X509CRLImpl implements
 116                     // DerEncoder
 117                     Set<X509CRLImpl> implCRLs = new HashSet<X509CRLImpl>(crls.length);
 118                     for (X509CRL crl : crls) {
 119                         if (crl instanceof X509CRLImpl) {
 120                             implCRLs.add((X509CRLImpl) crl);
 121                         } else {
 122                             try {
 123                                 byte[] encoded = crl.getEncoded();
 124                                 implCRLs.add(new X509CRLImpl(encoded));
 125                             } catch (CRLException ce) {
 126                                 throw new IOException(ce);
 127                             }
 128                         }
 129                     }
 130
 131                     // Add the CRL set (tagged with [1] IMPLICIT)
 132                     // to the signed data
 133                     signedData.putOrderedSetOf((byte) 0xA1, implCRLs.toArray(new X509CRLImpl[implCRLs.size()]));
 134                 }
 135
 136                 // signerInfos
 137                 signedData.putOrderedSetOf(DerValue.tag_Set, signerInfos);
 138
 139                 // making it a signed data block
 140                 DerValue signedDataSeq = new DerValue(DerValue.tag_Sequence, signedData.toByteArray());
 141
 142                 // making it a content info sequence
 143                 ContentInfo block = new ContentInfo(ContentInfo.SIGNED_DATA_OID, signedDataSeq);
 144
 145                 // writing out the contentInfo sequence
 146                 block.encode(out);
 147             }
 148
 149         };
 150         return p7;
 151     }
 152
 153     private static LinkedList<X509Certificate> getChain(Certificate c) throws IOException, GeneralSecurityException {
 154         LinkedList<X509Certificate> ll = new LinkedList<>();
 155         ll.add(c.cert());
 156         CACertificate ca = c.getParent();
 157         while ( !ca.isSelfsigned()) {
 158             ll.add(ca.getCertificate());
 159             ca = ca.getParent();
 160         }
 161         ll.add(ca.getCertificate());
 162         return ll;
 163     }
 164
 165 }