Home | History | Annotate | Download | only in extension 
      1 package org.bouncycastle.x509.extension;
      2 
      3 import java.io.IOException;
      4 import java.security.cert.CertificateParsingException;
      5 import java.security.cert.X509Certificate;
      6 import java.util.ArrayList;
      7 import java.util.Collection;
      8 import java.util.Collections;
      9 import java.util.Enumeration;
     10 import java.util.List;
     11 
     12 import org.bouncycastle.asn1.ASN1Object;
     13 import org.bouncycastle.asn1.ASN1OctetString;
     14 import org.bouncycastle.asn1.ASN1String;
     15 import org.bouncycastle.asn1.DERObjectIdentifier;
     16 import org.bouncycastle.asn1.DEROctetString;
     17 import org.bouncycastle.asn1.DERSequence;
     18 import org.bouncycastle.asn1.x509.GeneralName;
     19 import org.bouncycastle.asn1.x509.X509Extensions;
     20 import org.bouncycastle.asn1.x509.X509Name;
     21 
     22 
     23 public class X509ExtensionUtil
     24 {
     25     public static ASN1Object fromExtensionValue(
     26         byte[]  encodedValue)
     27         throws IOException
     28     {
     29         ASN1OctetString octs = (ASN1OctetString)ASN1Object.fromByteArray(encodedValue);
     30 
     31         return ASN1Object.fromByteArray(octs.getOctets());
     32     }
     33 
     34     public static Collection getIssuerAlternativeNames(X509Certificate cert)
     35             throws CertificateParsingException
     36     {
     37         byte[] extVal = cert.getExtensionValue(X509Extensions.IssuerAlternativeName.getId());
     38 
     39         return getAlternativeNames(extVal);
     40     }
     41 
     42     public static Collection getSubjectAlternativeNames(X509Certificate cert)
     43             throws CertificateParsingException
     44     {
     45         byte[] extVal = cert.getExtensionValue(X509Extensions.SubjectAlternativeName.getId());
     46 
     47         return getAlternativeNames(extVal);
     48     }
     49 
     50     private static Collection getAlternativeNames(byte[] extVal)
     51         throws CertificateParsingException
     52     {
     53         if (extVal == null)
     54         {
     55             return Collections.EMPTY_LIST;
     56         }
     57         try
     58         {
     59             Collection temp = new ArrayList();
     60             Enumeration it = DERSequence.getInstance(fromExtensionValue(extVal)).getObjects();
     61             while (it.hasMoreElements())
     62             {
     63                 GeneralName genName = GeneralName.getInstance(it.nextElement());
     64                 List list = new ArrayList();
     65                 // BEGIN android-changed
     66                 list.add(Integer.valueOf(genName.getTagNo()));
     67                 // END android-changed
     68                 switch (genName.getTagNo())
     69                 {
     70                 case GeneralName.ediPartyName:
     71                 case GeneralName.x400Address:
     72                 case GeneralName.otherName:
     73                     list.add(genName.getName().getDERObject());
     74                     break;
     75                 case GeneralName.directoryName:
     76                     list.add(X509Name.getInstance(genName.getName()).toString());
     77                     break;
     78                 case GeneralName.dNSName:
     79                 case GeneralName.rfc822Name:
     80                 case GeneralName.uniformResourceIdentifier:
     81                     list.add(((ASN1String)genName.getName()).getString());
     82                     break;
     83                 case GeneralName.registeredID:
     84                     list.add(DERObjectIdentifier.getInstance(genName.getName()).getId());
     85                     break;
     86                 case GeneralName.iPAddress:
     87                     list.add(DEROctetString.getInstance(genName.getName()).getOctets());
     88                     break;
     89                 default:
     90                     throw new IOException("Bad tag number: " + genName.getTagNo());
     91                 }
     92 
     93                 temp.add(list);
     94             }
     95             return Collections.unmodifiableCollection(temp);
     96         }
     97         catch (Exception e)
     98         {
     99             throw new CertificateParsingException(e.getMessage());
    100         }
    101     }
    102 }
    103