Re: libusb0.sys driver signing clarification

On Tue, Apr 22, 2014 at 5:27 PM, Pradeepa Senanayake
<[email protected]> wrote:
> Hello all,
>
> I'm using libusb-win32 for one of the projects that I'm currently involved
> in. I'm working on Windows 7 machine as well as on Windows 8.1 machine.
>
> I used the 'inf-wizard' to generate the inf file for the driver. I used the
> inf file to try installing the driver in both Win7 and Win8.1.

inf-wizard from libusb-win32 has been deprecated as it does not work
for Windows 8/8.1, You should use libusbK's inf-wizard.

> In Windows 7 machine I can install the driver by ignoring the warning the
> operating system gives. But in Windows 8.1 I cannot install the driver at
> all, it fails telling that the driver is not signed.
>
> Then I used Zadig to generate the related files. I noticed that a '.cat'
> file is also generated through Zadig. I tried this on Win8.1 and I extracted
> the driver files and installed the driver manually and flawlessly, without
> the driver signature error as well.
>
> But when I used those files (with cat file) on windows 7 machine it still
> gave the unsigned driver issue.
>
> Then I generated the cat file in windows 7 and istalled the driver use that
> package and i did not get the driver signature error. But those files do not
> work in Win8.1 environment or any other machine with Win7 installed.
>
> The questions I have is,
>
> 1). Is there any way to avoid driver unsigned warning?

Two ways.
1) Buy the code signing certificate and sign the driver package
2) Use libusbK's inf-wizard to generate the driver installation
package and it will take care of everything for you.

> 2). Is the '.cat' file generated through Zadig for only one machine?
Zadig is more meant to be used by the end user.

> 3). Is there any way to install the libusb-win32 driver on more than one
> machines, using same set of files (In windows 7 and windows 8.1)?

Yes, two ways.
1) Buy the code signing certificate and sign the driver package,
create a driver installer using libwdi or other tools.

2) Use libusbK's inf-wizard to generate the driver installation
package and it will take care of everything for you.


> 4). If we want to use this driver for our clients do we need to sign it as
> well?

See above.


-- 
Xiaofan

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