public static bool ExistsKeyContainer(this CryExpander exp)
{
try
{
return(FindSignerCertificate() != null);
}
catch
{
return(false);
}
}
public static X509Certificate2 FindSignerCertInKeyContainer(this CryExpander exp, X509Certificate2 certificate)
{
if (certificate == null)
{
return(null);
}
var certificateKey = certificate.PublicKey.EncodedKeyValue.RawData;
var containers = GetContainers();
foreach (var container in containers)
{
var containerKey = GetPublicKeyOfContainer(container);
if (Je.bin.IsEqualBytes(containerKey, certificateKey))
{
return(certificate);
}
}
return(null);
}
public static X509Certificate2 FindCertificateByThumbprint(this CryExpander exp, string thumbprint)
{
thumbprint = (thumbprint ?? string.Empty).ToUpper();
if (string.IsNullOrWhiteSpace(thumbprint))
{
return(null);
}
var store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadOnly);
try
{
var thumbprintBytes = Encoding.UTF8.GetBytes(thumbprint.ToUpper());
var cert = FindCertificateByThumbprint(store, thumbprintBytes);
if (cert != null)
{
return(cert);
}
thumbprintBytes = RemovePreamble(thumbprintBytes);
cert = FindCertificateByThumbprint(store, thumbprintBytes);
if (cert != null)
{
return(cert);
}
thumbprintBytes = RemovePreamble(thumbprintBytes);
cert = FindCertificateByThumbprint(store, thumbprintBytes);
return(cert);
}
catch
{
return(null);
}
finally
{
store.Close();
}
}