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From: jwei on 16 Feb 2010 14:00
windows ce 5, cf v3.5

i try to verify the signature of a signed cab-file (with certificate)
programmatically

i would use these steps :

1) build a signed cab with vs2008
2) get the cab into device
3) my app verifies the signature of the cab using a certificate (calc the
hash of the cab and compare with signature)

my questions:
- how i get the signature for verify from the signed cab file (not the hash) ?
- which additionaly packages i have to include in my os design (platform
builder) since i get an unknown error with function
RSACryptoServiceProvider.ImportCspBlob(pubkey); (i get pubkey byte[] from
cert.GetPublicKey(); already reduced by len=12 bytes) ?

thanks
From: jwei on 17 Feb 2010 02:49
this is the error i get on ImportCspBlob:

....
RSACryptoServiceProvider csp = new RSACryptoServiceProvider();
csp.ImportCspBlob(publicKeyData);
....

Unknown Error '8000700F'.

"jwei" wrote:

> windows ce 5, cf v3.5
>
> i try to verify the signature of a signed cab-file (with certificate)
> programmatically
>
> i would use these steps :
>
> 1) build a signed cab with vs2008
> 2) get the cab into device
> 3) my app verifies the signature of the cab using a certificate (calc the
> hash of the cab and compare with signature)
>
> my questions:
> - how i get the signature for verify from the signed cab file (not the hash) ?
> - which additionaly packages i have to include in my os design (platform
> builder) since i get an unknown error with function
> RSACryptoServiceProvider.ImportCspBlob(pubkey); (i get pubkey byte[] from
> cert.GetPublicKey(); already reduced by len=12 bytes) ?
>
> thanks
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