private static Asn1Sequence FromCertificate(
X509Certificate certificate)
{
try
{
GeneralName genName = new GeneralName(
PrincipalUtilities.GetIssuerX509Principal(certificate));
if (certificate.Version == 3)
{
Asn1OctetString ext = certificate.GetExtensionValue(X509Extensions.SubjectKeyIdentifier);
if (ext != null)
{
Asn1OctetString str = (Asn1OctetString)X509ExtensionUtilities.FromExtensionValue(ext);
return((Asn1Sequence) new AuthorityKeyIdentifier(
str.GetOctets(), new GeneralNames(genName), certificate.SerialNumber).ToAsn1Object());
}
}
SubjectPublicKeyInfo info = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(
certificate.GetPublicKey());
return((Asn1Sequence) new AuthorityKeyIdentifier(
info, new GeneralNames(genName), certificate.SerialNumber).ToAsn1Object());
}
catch (Exception e)
{
throw new CertificateParsingException("Exception extracting certificate details", e);
}
}
private static ICollection GetAlternativeName(Asn1OctetString extVal)
{
IList list = Platform.CreateArrayList();
if (extVal != null)
{
try
{
Asn1Sequence instance = Asn1Sequence.GetInstance(X509ExtensionUtilities.FromExtensionValue(extVal));
foreach (GeneralName generalName in instance)
{
IList list2 = Platform.CreateArrayList();
list2.Add(generalName.TagNo);
switch (generalName.TagNo)
{
case 0:
case 3:
case 5:
list2.Add(generalName.Name.ToAsn1Object());
break;
case 1:
case 2:
case 6:
list2.Add(((IAsn1String)generalName.Name).GetString());
break;
case 4:
list2.Add(X509Name.GetInstance(generalName.Name).ToString());
break;
case 7:
list2.Add(Asn1OctetString.GetInstance(generalName.Name).GetOctets());
break;
case 8:
list2.Add(DerObjectIdentifier.GetInstance(generalName.Name).Id);
break;
default:
throw new IOException("Bad tag number: " + generalName.TagNo);
}
list.Add(list2);
}
}
catch (Exception ex)
{
throw new CertificateParsingException(ex.Message);
}
}
return(list);
}
// private AuthorityKeyIdentifier authKeyID;
/**
* Constructor which will take the byte[] returned from getExtensionValue()
*
* @param encodedValue a DER octet encoded string with the extension structure in it.
* @throws IOException on parsing errors.
*/
public SubjectKeyIdentifierStructure(
Asn1OctetString encodedValue)
: base((Asn1OctetString)X509ExtensionUtilities.FromExtensionValue(encodedValue))
{
}
/**
* Constructor which will take the byte[] returned from getExtensionValue()
*
* @param encodedValue a DER octet encoded string with the extension structure in it.
* @throws IOException on parsing errors.
*/
// TODO Add a functional constructor from byte[]?
public AuthorityKeyIdentifierStructure(
Asn1OctetString encodedValue)
: base((Asn1Sequence)X509ExtensionUtilities.FromExtensionValue(encodedValue))
{
}
public static ICollection GetSubjectAlternativeNames(X509Certificate cert)
{
Asn1OctetString extensionValue = cert.GetExtensionValue(X509Extensions.SubjectAlternativeName);
return(X509ExtensionUtilities.GetAlternativeName(extensionValue));
}