private Byte[] GetBinaryCertificateProperty(ref CCertServerExit server, string name)
{
// https://blogs.msdn.microsoft.com/alejacma/2008/08/04/how-to-modify-an-interop-assembly-to-change-the-return-type-of-a-method-vb-net/
IntPtr variantObjectPtr = Marshal.AllocHGlobal(2048);
try
{
IntPtr bstrPtr;
int bstrLen;
// Get VARIANT containing certificate bytes
// Read ANSI BSTR information from the VARIANT as we know RawCertificate property is ANSI BSTR.
server.GetCertificateProperty(name, (int)PropertyType.PROPTYPE_BINARY, variantObjectPtr);
bstrPtr = Marshal.ReadIntPtr(variantObjectPtr, 8);
bstrLen = Marshal.ReadInt32(bstrPtr, -4);
byte[] result = new byte[bstrLen];
Marshal.Copy(bstrPtr, result, 0, bstrLen);
return(result);
}
catch
{
return(null);
}
finally
{
VariantClear(variantObjectPtr);
Marshal.FreeHGlobal(variantObjectPtr);
}
}
private int GetLongCertificateProperty(ref CCertServerExit server, string name)
{
IntPtr variantObjectPtr = Marshal.AllocHGlobal(2048);
try
{
server.GetCertificateProperty(name, (int)PropertyType.PROPTYPE_LONG, variantObjectPtr);
var result = (int)(Marshal.GetObjectForNativeVariant(variantObjectPtr));
return(result);
}
catch
{
return(0);
}
finally
{
VariantClear(variantObjectPtr);
Marshal.FreeHGlobal(variantObjectPtr);
}
}
