[Mono-bugs] [Bug 371695] ICryptoTransform should be reusable

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https://bugzilla.novell.com/show_bug.cgi?id=371695

User spouliot at novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=371695#c2


Sebastien Pouliot <spouliot at novell.com> changed:

           What    |Removed                                         |Added
----------------------------------------------------------------------------
             Status|NEW                                             |RESOLVED
          Component|System.Security                                 |CORLIB
         Resolution|                                                |WONTFIX




--- Comment #2 from Sebastien Pouliot <spouliot at novell.com>  2008-05-20 13:37:18 MST ---
This is a known issue. MS framework provides managed and unmanaged algorithms
that use different backends (ICryptoAPITransform for the later) and have some,
minor, differences. Mono has a single one (all managed implementation) so all
algorithms behave identically.

Also note that this property exists because it needs to be checked. Ignoring
it, because it looks static, will cause problems if you change the algorithm,
or the algorithm implementation, being used (including keeping the same
algorithm) [1].

Sadly the framework design, even we using CryptoStream, does not shield the
developers from making this check.


[1] E.g. if you call Rijndael.Create() instead of new RijndaelManaged (which is
the recommended pattern) you can't be sure what implementation you'll receive
(since the end-user machine.config could override what you expect to be
available).


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