"Dan" <D**@discussions.microsoft.com> wrote in message
news:7532B2CF-6748-4EE3-BB61-78028977A682@microsoft.com...
> currently i have program that loads .net assemblies using the
> Assembly.Load
> method from the Assembly class. the assemblies have several plug ins
> classes
> that i load. I want to make sure that the assembly that i am loading is
> one
> made by me. (have been signed by me using my StrongName Key). how do i do
> that? Code examples will be great.

"David Levine" wrote:

> Here's a routine that extracts the public key token from an assembly. You
> can use this to extract the token from the assembly you loaded and then
> compare that against the assembly that is executing, which is signed with
> your company's strong name.
>
> using System.Collections;
> using System.Security;
> using System.Security.Policy;
> using System.Security.Permissions;
> using System.Reflection;
>
>
>   /// <summary>
>   /// This gets the public key portion of the strong name for the assembly.
>   /// Use the reflection APIs to extract the strong name
>   /// from the executing assembly.
>   /// </summary>
>   /// <returns></returns>
>   private StrongNamePublicKeyBlob GetStrongNamePublicKey (Assembly asm)
>   {
>    // this gets the dynamic value
>    IEnumerator e = asm.Evidence.GetEnumerator();
>    while ( e.MoveNext() )
>    {
>     if ( e.Current.GetType() == typeof(
> System.Security.Policy.StrongName ) )
>     {
>      StrongName u = (StrongName)e.Current;
>      Trace.WriteLine( string.Format("Name= {0}, {1}; PublicKey= {2}",
> u.Name, u.Version, u.PublicKey) );
>      return u.PublicKey;
>     }
>    } //while ( e.MoveNext() )
>    throw new SecurityException( "Unable to extract public key strong name
> from assembly." );
>   }//  GetStrongName
>
> use it like this...
>
>   public Assembly LoadMyPlugin (string pluginName )
>   {
>    Assembly a = Assembly.Load(pluginName); // or some variant of Loadxxx
>    StrongNamePublicKeyBlob me = GetStrongNamePublicKey(
> Assembly.GetExecutingAssembly() ); //
>    StrongNamePublicKeyBlob caller = GetStrongNamePublicKey( a );
>    if ( !me.Equals( caller ) )
>     throw new InvalidOperationException( "You are not allowed to call
> me." ); // or throw a SecurityException
>   return a;  // I wrote it...
>   }
>
>
>
> "Dan" <D**@discussions.microsoft.com> wrote in message
> news:7532B2CF-6748-4EE3-BB61-78028977A682@microsoft.com...
> > currently i have program that loads .net assemblies using the
> > Assembly.Load
> > method from the Assembly class. the assemblies have several plug ins
> > classes
> > that i load. I want to make sure that the assembly that i am loading is
> > one
> > made by me. (have been signed by me using my StrongName Key). how do i do
> > that? Code examples will be great.
>
>
>
>