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List:       ms-cryptoapi
Subject:    Re: Verify signed file
From:       Carlos Lopez <clopez () MICROSOFT ! COM>
Date:       2001-12-19 15:46:53
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That's correct.  IE5 is required.  Sorry if I didn't state that, I was thing of Win98 \
SE.  For the most system wide crypto compatibility, IE5 should be required.

Thanks
Carlos

-----Original Message-----
From: Kostka, Petr [mailto:petr.kostka@ST.COM] 
Sent: Wednesday, December 19, 2001 7:37 AM
To: CryptoAPI@DISCUSS.MICROSOFT.COM
Subject: Re: Verify signed file

The function itself is supported on Windows 98, but I think Jonas
cannot use it for his purpose. To extract the certificate,
he needs WINTRUST_ACTION_GENERIC_CHAIN_VERIFY WinTrust provider
which is the only one that provides callback to the caller
with the certificate chain. And I think this provider
comes with IE5 (i.e. Win98 SE). I was solving the same problem
like Jonas and if I remember it correctly this disallowed
us to use WinVerifyTrust() on plain old Windows 98.

Petr

> -----Original Message-----
> From: clopez@MICROSOFT.COM [mailto:clopez@MICROSOFT.COM] 
> Sent: 19. prosince 2001 16:21
> To: CryptoAPI@DISCUSS.MICROSOFT.COM
> Subject: Re: Verify signed file
> 
> 
> WinVerifyTrust() is supported on Windows 98.  
> 
> Thanks
> Carlos
> 
> -----Original Message-----
> From: Jonas Johansson [mailto:jj@PRECISEBIOMETRICS.COM] 
> Sent: Tuesday, December 18, 2001 11:43 PM
> To: CryptoAPI@DISCUSS.MICROSOFT.COM
> Subject: Re: Verify signed file
> 
> Because I want my program to support Windows 98. Did I 
> misunderstand something? (I thought WinVerifyTrust() only 
> worked on Windows 2000/NT 4.)
> 
> Jonas
> 
> 
> -----Original Message-----
> From: Microsoft Cryptographic API 
> [mailto:CryptoAPI@DISCUSS.MICROSOFT.COM]On Behalf Of Daniel Sie
> Sent: 19 December 2001 00:38
> To: CryptoAPI@DISCUSS.MICROSOFT.COM
> Subject: Re: Verify signed file
> 
> 
> Why can't you use WinVerifyTrust()?
> 
> -----Original Message-----
> From: Jonas Johansson [mailto:jj@PRECISEBIOMETRICS.COM]
> Sent: Tuesday, December 18, 2001 6:15 AM
> To: CryptoAPI@DISCUSS.MICROSOFT.COM
> Subject: Verify signed file
> 
> 
> Hi,
> 
> I have a problem. I want to verify the signature on a dll 
> before I load it. My idea is to first check the attached 
> certificate and if this has the correct attributes (serial 
> number etc..) then verify the signature. I know that I can 
> verify the signature with WinVerifyTrust, but I want to 
> support Windows 98, so I donīt think I use that function. (Can I?)
> 
> So does anyone know how I can:
> 1. Check the name and serial number on the attached 
> certificate (in the signature block). 2. Verify the signature 
> on the file with its attached certificate without using 
> WinVerifyTrust.
> 
> This is a really important problem for me, and I would highly 
> appreaciate any help.
> 
> Thank you in advance,
> Jonas
> mailto:jj@precisebiometrics.com
> 
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