/// <summary>
/// Gets the physical certificates that match the input certificate from the Local Machine and Trusted People store.
/// </summary>
/// <param name="certificate"></param>
/// <returns></returns>
public static List<X509Certificate2> GetCertificates(Certificate certificate)
{
// If the certificate is null then we have none matching ?
if (certificate == null)
return null;
X509Store x509Store;
try
{
x509Store = new X509Store(StoreName.TrustedPeople, StoreLocation.LocalMachine);
x509Store.Open(OpenFlags.ReadOnly);
}
catch (Exception ex)
{
Logger.Error("Could not access certificate store.", ex);
return null;
}
return x509Store.Certificates.Cast<X509Certificate2>().Where(c => (ContainsCondition(c.Issuer, certificate.Issuer)) &&
(EqualCondition(c.GetPublicKeyString(), certificate.PublicKey)) &&
(EqualCondition(c.GetSerialNumberString(), certificate.SerialNumber)) &&
(ContainsCondition(c.Subject, certificate.Subject)) &&
(EqualCondition(c.GetEffectiveDateString(), certificate.ValidFrom != DateTime.MinValue ? certificate.ValidFrom.ToString() : null)) &&
(EqualCondition(c.GetExpirationDateString(), certificate.ValidTo != DateTime.MinValue ? certificate.ValidTo.ToString() : null))).ToList();
}
/// <summary>
/// Checks whether the invoker has a matching certificate in his physical store.
/// </summary>
/// <param name="certificate"></param>
/// <returns></returns>
public static bool HasCertificate(Certificate certificate)
{
if (certificate == null)
return true;
List<X509Certificate2> certificates = GetCertificates(certificate);
Logger.Debug(String.Format("CertificateHelper: HasCertificate matched on '{0}' certificates.", certificates != null ? certificates.Count : 0));
return (certificates != null && certificates.Count == 1);
}
/// <summary>
/// Gets a single certificate if a perfect match is found.
/// </summary>
/// <param name="certificate"></param>
/// <returns></returns>
public static X509Certificate2 GetCertificate(Certificate certificate)
{
if (certificate == null)
return null;
List<X509Certificate2> certificates = GetCertificates(certificate);
Logger.Debug(String.Format("CertificateHelper: GetCertificate matched on '{0}' certificates.", certificates != null ? certificates.Count : 0));
return (certificates != null && certificates.Count == 1) ? certificates.First() : null;
}