about unsigned drivers

[weihuisheng]

I reduce some files from my signed driver

then it become unsigned

I add it to my xp install cd.

Could it be silently installed in xp installation process??

How could I make it work??

[Bâshrat the Sneaky]

Set in your winnt.sif:

[Unattended]

DriverSigningPolicy=Ignore

or to keep it signed: simply don't remove the .cat files.

[weihuisheng]

thanks

another problem I want to know is that when I modify the inf file of the driver,is the cat file still available??

[Bâshrat the Sneaky]

thanks

another problem I want to know is that when I modify the inf file of the driver,is the cat file still available??

Yes. Somewhere in the beginning of an .inf driver file there's a .cat file mentioned. If you don't delete it, it will remain a signed driver

[TechTalker]

Hmm, don't think so.

Why are people signing drivers?

One good reason is that they want to guarantee the driver is unchanged! If you change the driver e.g. by editing the INF the driver is changed and the CAT doesn't fit to the driver (the CAT contains a hash). Or you may also say the driver is unsigned.

[Bâshrat the Sneaky]

Hmm, don't think so.

Why are people signing drivers?

One good reason is that they want to guarantee the driver is unchanged! If you change the driver e.g. by editing the INF the driver is changed and the CAT doesn't fit to the driver (the CAT contains a hash). Or you may also say the driver is unsigned.

Then let's take a quick look at one.

Here's the inf of the Audigy ZS' driver:

[Version]
Signature="$CHICAGO$"
Class=MEDIA
ClassGUID={4d36e96c-e325-11ce-bfc1-08002be10318}
provider=%CREAF%
LayoutFile=layout.inf, layout1.inf, layout2.inf
DriverVer=10/21/2003, 5.12.05.0441
CatalogFile=wdma_emu.cat<==========================

[TechTalker]

OK, the reference to the CAT file is still in the INF but the signature is no more valid for any changed files. The CAT file contains a tag and hash code for every component of the driver. If one of them is changed the signature is broken.

I tried to find some info about this mechanism. The following PowerPoint presentation is the best I found: http://download.microsoft.com/download/a/f...740/driver2.ppt

[Bâshrat the Sneaky]

oh... Didn't know of that. I'll read it later, now I've got to go to school to make my exams...

[weihuisheng]

Yes,thanks

I think it will be changed and the catelog file will be unsigned!

[weihuisheng]

thanks ,Bâshrat the Sneaky

[unattended]DriverSigningPolicy=Ignore

Will it work??

I don't have a chance to try it myself.

but I modify my winnt.sif as you said.

waiting for the next installation.......

[weihuisheng]

Another thing I want to know is that the changes to winnt.sif will be automatically applied to the xp installation?

When I modify the winnt.sif and put my personal settings into it,could I get it automatically applied in the xp installation?

Could I get the xp unattended installation by modifying it instead of using the windows unattended installation?

[Bâshrat the Sneaky]

Of course it's applied. What else would be the advantage?

[weihuisheng]

You mean I could set my IP, my networkand so on in it??

It will be applied??

[Bâshrat the Sneaky]

Yes, if you do it correctly.

A great help may be the deploy.chm, which you can find in the Deploy tools.

[weihuisheng]

thanks

Does this mean we can do most of the unattended installation??

It's great!!