private PkixCertPathBuilderResult Build(IX509AttributeCertificate attrCert, X509Certificate tbvCert, PkixBuilderParameters pkixParams, IList tbvPath)
{
if (tbvPath.Contains(tbvCert))
{
return(null);
}
if (pkixParams.GetExcludedCerts().Contains(tbvCert))
{
return(null);
}
if (pkixParams.MaxPathLength != -1 && tbvPath.Count - 1 > pkixParams.MaxPathLength)
{
return(null);
}
tbvPath.Add(tbvCert);
PkixCertPathBuilderResult pkixCertPathBuilderResult = null;
PkixAttrCertPathValidator pkixAttrCertPathValidator = new PkixAttrCertPathValidator();
try
{
if (PkixCertPathValidatorUtilities.FindTrustAnchor(tbvCert, pkixParams.GetTrustAnchors()) != null)
{
PkixCertPath certPath = new PkixCertPath(tbvPath);
PkixCertPathValidatorResult pkixCertPathValidatorResult;
try
{
pkixCertPathValidatorResult = pkixAttrCertPathValidator.Validate(certPath, pkixParams);
}
catch (Exception innerException)
{
throw new Exception("Certification path could not be validated.", innerException);
}
return(new PkixCertPathBuilderResult(certPath, pkixCertPathValidatorResult.TrustAnchor, pkixCertPathValidatorResult.PolicyTree, pkixCertPathValidatorResult.SubjectPublicKey));
}
try
{
PkixCertPathValidatorUtilities.AddAdditionalStoresFromAltNames(tbvCert, pkixParams);
}
catch (CertificateParsingException innerException2)
{
throw new Exception("No additional X.509 stores can be added from certificate locations.", innerException2);
}
ISet set = new HashSet();
try
{
set.AddAll(PkixCertPathValidatorUtilities.FindIssuerCerts(tbvCert, pkixParams));
}
catch (Exception innerException3)
{
throw new Exception("Cannot find issuer certificate for certificate in certification path.", innerException3);
}
if (set.IsEmpty)
{
throw new Exception("No issuer certificate for certificate in certification path found.");
}
foreach (X509Certificate item in set)
{
if (!PkixCertPathValidatorUtilities.IsSelfIssued(item))
{
pkixCertPathBuilderResult = Build(attrCert, item, pkixParams, tbvPath);
if (pkixCertPathBuilderResult != null)
{
break;
}
}
}
}
catch (Exception innerException4)
{
certPathException = new Exception("No valid certification path could be build.", innerException4);
}
if (pkixCertPathBuilderResult == null)
{
tbvPath.Remove(tbvCert);
}
return(pkixCertPathBuilderResult);
}
