Re: SecurityException "Request Failed"

From: Nicole Calinoiu (nicolec_at_somewhere.net)
Date: 08/01/04

  • Next message: Bismark Prods: "Re: MD4 class in VB.NET" 
    Date: Sun, 1 Aug 2004 02:33:22 -0400

    Is there any reason you couldn't use delegates for this?

    "VJ" <anonymous@discussions.microsoft.com> wrote in message
    news:75ee01c4765b$6694dd30$a301280a@phx.gbl...
    > Thanks for taking the time to reproduce the problem.
    >
    > First, my Partially trusted assembly(PTA) is strong named.
    > I've tried making my best guesses as to what the
    > permissions needed are, but haven't been able to figure it
    > out. I can say it is definitely a CAS issue, as when I
    > assert full permissions, the call goes through.
    >
    > W/o giving away too much ;) I have a library A that is
    > locally installed and is used by applications that may be
    > PTA in certain scenarios (application is downloaded etc).
    > In the library, I attempt to instantiate classes in the
    > PTA based on some criteria (I walk through the types in
    > the PTA and check for criteria) upon initialization.
    >
    >
    >>-----Original Message-----
    >>Unfortunately, I can reproduce the problem just fine, and
    > it definitely runs
    >>counter to the available documentation on the permissions
    > that are supposed
    >>to be required for this sort of invocation via
    > reflection. I'll try to play
    >>with it a bit more to see if I can narrow down the
    > problem a bit. However,
    >>in case it's not possible to make the problem without
    > unrestricted
    >>permissions, perhaps it might be best if you could
    > describe what exactly it
    >>is you are trying to do. Maybe someone can suggest an
    > alternative that
    >>wouldn't require reflection at all...
    >>
    >>
    >>
    >>"VJ" <anonymous@discussions.microsoft.com> wrote in
    > message
    >>news:493201c4735d$475349d0$a501280a@phx.gbl...
    >>> Yes, and yes :(
    >>>
    >>>>-----Original Message-----
    >>>>Do either or both of the following scenarios work?
    >>>>
    >>>>1. Call c() from b() without using reflection.
    >>>>2. Call c() from b() using reflection, but with c()
    >>> being launched directly
    >>>>(not via reflection) from other fully trusted code
    >>> instead of from a().
    >>>>
    >>>>
    >>>>
    >>>>"VJ" <anonymous@discussions.microsoft.com> wrote in
    >>> message
    >>>>news:44b901c47336$543898c0$a401280a@phx.gbl...
    >>>>> The calling assembly does have full trust. But the
    > call
    >>> is
    >>>>> part of a stack frame that has the partially trusted
    >>>>> assembly higher up in the call sequence . In other
    >>> words,
    >>>>> the method that is asserting the permissions is being
    >>>>> called by the partially trusted assembly, and this
    >>> method
    >>>>> in turn is trying to invoke a method of another class
    > in
    >>>>> the partially trusted assembly.
    >>>>>
    >>>>> eg:
    >>>>> a() calls b() calls c()
    >>>>>
    >>>>> Both a() and c() are in the partially trusted
    > assembly.
    >>>>> b() is the method that is asserting the permissions.
    >>>>>
    >>>>> The type and methods being called are all public.
    >>>>>
    >>>>> VJ
    >>>>>
    >>>>>>-----Original Message-----
    >>>>>>"VJ" <anonymous@discussions.microsoft.com> wrote in
    >>>>> message
    >>>>>>news:3c0d01c472b9$2a619150$a601280a@phx.gbl...
    >>>>>>> The method that is making the call has Unrestricted
    >>>>>>> reflection permission asserted. Any idea why this
    >>> fails.
    >>>>>>
    >>>>>>If the calling assembly has full trust, there should
    > be
    >>>>> no need to assert
    >>>>>>reflection permissions. The most likely reason for
    > the
    >>>>> failure is that the
    >>>>>>callee requires some permission that is not
    >>> automatically
    >>>>> granted to fully
    >>>>>>trusted code. Did you author the callee code? What's
    >>>>> the accessibility
    >>>>>>level on the classes and methods you're attempting to
    >>>>> call? Can you call
    >>>>>>them successfully without using reflection?
    >>>>>>
    >>>>>>
    >>>>>>.
    >>>>>>
    >>>>
    >>>>
    >>>>.
    >>>>
    >>
    >>
    >>.
    >>

  • Next message: Bismark Prods: "Re: MD4 class in VB.NET"

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