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using System;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Security.Certificates;
namespace Org.BouncyCastle.X509
{
/// <remarks>
/// A utility class that will extract X509Principal objects from X.509 certificates.
/// <p>
/// Use this in preference to trying to recreate a principal from a string, not all
/// DNs are what they should be, so it's best to leave them encoded where they
/// can be.</p>
/// </remarks>
public class PrincipalUtilities
{
/// <summary>Return the issuer of the given cert as an X509Principal.</summary>
public static X509Name GetIssuerX509Principal(
X509Certificate cert)
{
try
{
TbsCertificateStructure tbsCert = TbsCertificateStructure.GetInstance(
Asn1Object.FromByteArray(cert.GetTbsCertificate()));
return tbsCert.Issuer;
}
catch (Exception e)
{
throw new CertificateEncodingException("Could not extract issuer", e);
}
}
/// <summary>Return the subject of the given cert as an X509Principal.</summary>
public static X509Name GetSubjectX509Principal(
X509Certificate cert)
{
try
{
TbsCertificateStructure tbsCert = TbsCertificateStructure.GetInstance(
Asn1Object.FromByteArray(cert.GetTbsCertificate()));
return tbsCert.Subject;
}
catch (Exception e)
{
throw new CertificateEncodingException("Could not extract subject", e);
}
}
/// <summary>Return the issuer of the given CRL as an X509Principal.</summary>
public static X509Name GetIssuerX509Principal(
X509Crl crl)
{
try
{
TbsCertificateList tbsCertList = TbsCertificateList.GetInstance(
Asn1Object.FromByteArray(crl.GetTbsCertList()));
return tbsCertList.Issuer;
}
catch (Exception e)
{
throw new CrlException("Could not extract issuer", e);
}
}
}
}
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