"Rymfax" <cw*****@bigban gllc.comwrote in message
news:71******** *************** ***********@n75 g2000hsh.google groups.com...
Hey all.
I need to determine whether or not a Windows Driver is digitally
signed using a C# application. Can anyone point me in the right
direction for doing this? I know it has something to do with the .cat
file, but I'm not sure exactly what else I need to do.
TIA!
If the driver file is signed, then it should contain a valid X509
certificate, so one way to check this is by using using the
System.Security .Cryptography.X 509Certificates namespace.
Here a small snip to get you started..
using System;
using System.Security .Cryptography;
using System.Security .Cryptography.X 509Certificates ;
....
X509Certificate certp =
X509Certificate 2.CreateFromSig nedFile(@"C:\Wi ndows\System32\ drivers\tcpip.s ys");
X509Certificate 2 x509 = new X509Certificate 2(certp.Handle) ;
// if valid, dump some properties to the console
Console.WriteLi ne("{0}Subject : {1}{0}",
Environment.New Line,x509.Subje ct);
Console.WriteLi ne("{0}Issuer: {1}{0}", Environment.New Line,x509.Issue r);
Console.WriteLi ne("{0}Version : {1}{0}",
Environment.New Line,x509.Versi on);
Console.WriteLi ne("{0}Valid Date: {1}{0}",
Environment.New Line,x509.NotBe fore);
Console.WriteLi ne("{0}Expiry Date: {1}{0}",
Environment.New Line,x509.NotAf ter);
Console.WriteLi ne("{0}Thumbpri nt: {1}{0}",
Environment.New Line,x509.Thumb print);
Console.WriteLi ne("{0}Serial Number: {1}{0}",
Environment.New Line,x509.Seria lNumber);
Console.WriteLi ne("{0}Friendl y Name: {1}{0}",
Environment.New Line,x509.Publi cKey.Oid.Friend lyName);
Console.WriteLi ne("{0}Public Key Format: {1}{0}",
Environment.New Line,x509.Publi cKey.EncodedKey Value.Format(tr ue));
Console.WriteLi ne("{0}Raw Data Length: {1}{0}",
Environment.New Line,x509.RawDa ta.Length);
Console.WriteLi ne("{0}Certific ate to string: {1}{0}",
Environment.New Line,x509.ToStr ing(true));
Willy.
