Hi Wei,

Thanks. The topics have been revised.

Jeff

On 3/11/09, Wei Dai <[email protected]> wrote:
> Jeffrey Walton wrote:
> >
> > > Any ideas on what I should be using?
> > >
> > Cancel. I punted and used a SecByteBlock in the object (neither
> > CreatePutSpace or CreateChannelPutSpace appears to be implemented).
> > SecByteBlock also seemed more appropriate since it scrubs memory on
> > destruction.
> >
>
> CreatePutSpace() is implemented by Filters that happen to have an existing
> allocated buffer that can be reused. The caller has to be prepared for the
> possibility that it will return NULL and fall back to using its own
> SecByteBlock in that case. There's a helper class FilterPutSpaceHelper that
> does this for you. Or you can not worry about saving the memory allocations
> and copies and just use a SecByteBlock directly, like you've done.
>
> > Wei: any corrections or omissions would be appreciated.
> >
>
> In IsolatedFlush(), you're not supposed to call IsolatedFlush() on the
> AttachedTransformation(). This will be done by Filter's implementation of
> Flush().
>
> You should probably warn the Wiki reader that the interfaces used to
> implement a Filter may not be as stable as the interfaces that are meant to
> be used by applications. The basic Put() and Get() for example are backwards
> compatible to early versions of Crypto++, while Put2() and IsolatedFlush()
> were introduced in version 5.0, I think.
>
>
>

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