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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Security.Certificates;
namespace Org.BouncyCastle.X509.Extension
{
/// <remarks>A high level authority key identifier.</remarks>
public class AuthorityKeyIdentifierStructure
: AuthorityKeyIdentifier
{
/**
* 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))
{
}
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 Asn1Sequence FromKey(
AsymmetricKeyParameter pubKey)
{
try
{
SubjectPublicKeyInfo info = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pubKey);
return (Asn1Sequence) new AuthorityKeyIdentifier(info).ToAsn1Object();
}
catch (Exception e)
{
throw new InvalidKeyException("can't process key: " + e);
}
}
/**
* Create an AuthorityKeyIdentifier using the passed in certificate's public
* key, issuer and serial number.
*
* @param certificate the certificate providing the information.
* @throws CertificateParsingException if there is a problem processing the certificate
*/
public AuthorityKeyIdentifierStructure(
X509Certificate certificate)
: base(FromCertificate(certificate))
{
}
/**
* Create an AuthorityKeyIdentifier using just the hash of the
* public key.
*
* @param pubKey the key to generate the hash from.
* @throws InvalidKeyException if there is a problem using the key.
*/
public AuthorityKeyIdentifierStructure(
AsymmetricKeyParameter pubKey)
: base(FromKey(pubKey))
{
}
}
}
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