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c# : Hide Interface?
Do not make it public. Cheers, -- Ignacio Machin, ignacio.machin AT dot.state.fl.us Florida Department Of Transportation [quoted text, click to view] "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... > Is there an attribute (or another method) to hide an interface (in a dll) > from being seen from the object browser while browsing a dll? > > Thanks in advance, > pnp > >
pnp,
Even if you were able to hide it from an object browser, the metadata for the interface could still be read (if you have to make it public, then there is nothing you can do about this). However, if you are dealing with object browsers that use the Reflection API, then you can probably place a ReflectionPermission attribute on your types, denying the permission. This should offer some sort of protection. Hope this helps. -- - Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com [quoted text, click to view] "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message news:e9hyWa6iEHA.3876@TK2MSFTNGP15.phx.gbl... > The problem is that it has to be public because it is being used by other > assemblies... The need to hide it is for security reasons. > > Can anything be done? > > > > "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> > wrote > in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... >> Hi, >> >> Do not make it public. >> >> Cheers, >> >> -- >> Ignacio Machin, >> ignacio.machin AT dot.state.fl.us >> Florida Department Of Transportation >> >> >> "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message >> news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... >> > Is there an attribute (or another method) to hide an interface (in a > dll) >> > from being seen from the object browser while browsing a dll? >> > >> > Thanks in advance, >> > pnp >> > >> > >> >> > >
Is there an attribute (or another method) to hide an interface (in a dll)
from being seen from the object browser while browsing a dll? Thanks in advance, pnp
The problem is that it has to be public because it is being used by other
assemblies... The need to hide it is for security reasons. Can anything be done? [quoted text, click to view] "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> wrote in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... > Hi, > > Do not make it public. > > Cheers, > > -- > Ignacio Machin, > ignacio.machin AT dot.state.fl.us > Florida Department Of Transportation > > > "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... > > Is there an attribute (or another method) to hide an interface (in a dll) > > from being seen from the object browser while browsing a dll? > > > > Thanks in advance, > > pnp > > > > > >
I'll give it a try, thank you both.
"Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard.caspershouse.com> wrote in message news:%23JGr6f6iEHA.2500@TK2MSFTNGP15.phx.gbl... [quoted text, click to view] > pnp, > > Even if you were able to hide it from an object browser, the metadata > for the interface could still be read (if you have to make it public, then > there is nothing you can do about this). > > However, if you are dealing with object browsers that use the Reflection > API, then you can probably place a ReflectionPermission attribute on your > types, denying the permission. This should offer some sort of protection. > > Hope this helps. > > > -- > - Nicholas Paldino [.NET/C# MVP] > - mvp@spam.guard.caspershouse.com > > "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > news:e9hyWa6iEHA.3876@TK2MSFTNGP15.phx.gbl... > > The problem is that it has to be public because it is being used by other > > assemblies... The need to hide it is for security reasons. > > > > Can anything be done? > > > > > > > > "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> > > wrote > > in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... > >> Hi, > >> > >> Do not make it public. > >> > >> Cheers, > >> > >> -- > >> Ignacio Machin, > >> ignacio.machin AT dot.state.fl.us > >> Florida Department Of Transportation > >> > >> > >> "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > >> news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... > >> > Is there an attribute (or another method) to hide an interface (in a > > dll) > >> > from being seen from the object browser while browsing a dll? > >> > > >> > Thanks in advance, > >> > pnp > >> > > >> > > >> > >> > > > > > >
Could you post me an example because I didn't have any luck by trying it my
self? "Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard.caspershouse.com> wrote in message news:%23JGr6f6iEHA.2500@TK2MSFTNGP15.phx.gbl... [quoted text, click to view] > pnp, > > Even if you were able to hide it from an object browser, the metadata > for the interface could still be read (if you have to make it public, then > there is nothing you can do about this). > > However, if you are dealing with object browsers that use the Reflection > API, then you can probably place a ReflectionPermission attribute on your > types, denying the permission. This should offer some sort of protection. > > Hope this helps. > > > -- > - Nicholas Paldino [.NET/C# MVP] > - mvp@spam.guard.caspershouse.com > > "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > news:e9hyWa6iEHA.3876@TK2MSFTNGP15.phx.gbl... > > The problem is that it has to be public because it is being used by other > > assemblies... The need to hide it is for security reasons. > > > > Can anything be done? > > > > > > > > "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> > > wrote > > in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... > >> Hi, > >> > >> Do not make it public. > >> > >> Cheers, > >> > >> -- > >> Ignacio Machin, > >> ignacio.machin AT dot.state.fl.us > >> Florida Department Of Transportation > >> > >> > >> "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > >> news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... > >> > Is there an attribute (or another method) to hide an interface (in a > > dll) > >> > from being seen from the object browser while browsing a dll? > >> > > >> > Thanks in advance, > >> > pnp > >> > > >> > > >> > >> > > > > > >
Nicholas,
Do you have any evidence that denying ReflectionPermission (or any flag subset) via an attribute at the class or member level has any effect at all? I've tested quite a few variations on the theme (incl. imperative denial of the permission), and I've never seen any effect on member discoverability or accessibility via reflection. It could be that the reflection methods are asserting the permission after an initial stack walk to determine if the desired activity is permitted to the callers. This would make sense in an odd sort of way since the ReflectionPermission settings for the target can't be determined until after it's already been loaded. That said, it would still be terribly inconsistent with the expected behaviour for a CAS permission... Nicole "Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard.caspershouse.com> wrote in message news:%23JGr6f6iEHA.2500@TK2MSFTNGP15.phx.gbl... [quoted text, click to view] > pnp, > > Even if you were able to hide it from an object browser, the metadata > for the interface could still be read (if you have to make it public, then > there is nothing you can do about this). > > However, if you are dealing with object browsers that use the > Reflection API, then you can probably place a ReflectionPermission > attribute on your types, denying the permission. This should offer some > sort of protection. > > Hope this helps. > > > -- > - Nicholas Paldino [.NET/C# MVP] > - mvp@spam.guard.caspershouse.com > > "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > news:e9hyWa6iEHA.3876@TK2MSFTNGP15.phx.gbl... >> The problem is that it has to be public because it is being used by other >> assemblies... The need to hide it is for security reasons. >> >> Can anything be done? >> >> >> >> "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> >> wrote >> in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... >>> Hi, >>> >>> Do not make it public. >>> >>> Cheers, >>> >>> -- >>> Ignacio Machin, >>> ignacio.machin AT dot.state.fl.us >>> Florida Department Of Transportation >>> >>> >>> "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message >>> news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... >>> > Is there an attribute (or another method) to hide an interface (in a >> dll) >>> > from being seen from the object browser while browsing a dll? >>> > >>> > Thanks in advance, >>> > pnp >>> > >>> > >>> >>> >> >> > >
Actually, ignore the second paragraph of my last post entirely. The
framework almost certainly doesn't need an assertion to prevent the deny from working since there's no need for ReflectionPermission to be evaluated after the target is loaded. In fact, to be consistent with the other permissions, stack walk modifiers on the target class or member should probably be ignored. For example, a file doesn't get to specify a modifier for a FileIOPermission (ignoring the fact that there's no mechanism in place for this <g>), so why should code get to specify a modifier for ReflectionPermission? Doesn't mean I necessarily like the behaviour, but there is a certain logic to it. "Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard.caspershouse.com> wrote in message news:%23JGr6f6iEHA.2500@TK2MSFTNGP15.phx.gbl... [quoted text, click to view] > pnp, > > Even if you were able to hide it from an object browser, the metadata > for the interface could still be read (if you have to make it public, then > there is nothing you can do about this). > > However, if you are dealing with object browsers that use the > Reflection API, then you can probably place a ReflectionPermission > attribute on your types, denying the permission. This should offer some > sort of protection. > > Hope this helps. > > > -- > - Nicholas Paldino [.NET/C# MVP] > - mvp@spam.guard.caspershouse.com > > "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message > news:e9hyWa6iEHA.3876@TK2MSFTNGP15.phx.gbl... >> The problem is that it has to be public because it is being used by other >> assemblies... The need to hide it is for security reasons. >> >> Can anything be done? >> >> >> >> "Ignacio Machin ( .NET/ C# MVP )" <ignacio.machin AT dot.state.fl.us> >> wrote >> in message news:uhbqIX6iEHA.2664@TK2MSFTNGP11.phx.gbl... >>> Hi, >>> >>> Do not make it public. >>> >>> Cheers, >>> >>> -- >>> Ignacio Machin, >>> ignacio.machin AT dot.state.fl.us >>> Florida Department Of Transportation >>> >>> >>> "pnp" <pnp.at.softlab.ece.ntua.gr> wrote in message >>> news:OGQZ9H6iEHA.3148@TK2MSFTNGP10.phx.gbl... >>> > Is there an attribute (or another method) to hide an interface (in a >> dll) >>> > from being seen from the object browser while browsing a dll? >>> > >>> > Thanks in advance, >>> > pnp >>> > >>> > >>> >>> >> >> > >
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