On 26/05/07, Nils Larsch <[EMAIL PROTECTED]> wrote:
> Andreas Jellinghaus wrote:
> > On Thursday 24 May 2007 15:12:34 Robin Bryce wrote:
> >> supposed to obtain the required size from the implementation. Current
> >> code forces it to the result of PKCS11_get_key_size. I don't
> >> understand how this could ever be the "right thing" to do - what am I
> >> missing ?
> >
> > not sure either. if you want I can apply your patch so we can try to find 
> > out.
>
> I think the patch is correct

Thanks for taking the time to look at it.

I've been down with flu for past few days. After posting the patch I
think I discovered the reason. openssl s_server does not appear to use
the "size discovery" idiom I mentioned in the OP. From memory,
RSA_size/ RSA_sign don't do the right thing with the ENGINE api.

I was looking at this from the perspective of producing a patch for
apache2.2/mod_ssl that enabled openssl/engine support for a particular
piece of hardware rather than openssl's apps suite. So I missed the
significance of the comments in the original source.

I'll open a ticket in libp11 for it when this flu lifts.

Cheers,
Robin

On 26/05/07, Nils Larsch <[EMAIL PROTECTED]> wrote:
> Andreas Jellinghaus wrote:
> > On Thursday 24 May 2007 15:12:34 Robin Bryce wrote:
> >> Was not sure whether this should be a ticket on the opensc trac or the
> >> libp11 trac.
> >
> > this is libp11 code, so the libp11 trac is prefered.
> >
> >> Thought I'd raise it here instead. I believe the current
> >> implementation of PKCS11_sign is broken. It should propogate the
> >> callers "guess" of signature size to the underlying p11
> >> implementation. AIUI: Setting sigsize==0 is *how* applications are
> >> supposed to obtain the required size from the implementation. Current
> >> code forces it to the result of PKCS11_get_key_size. I don't
> >> understand how this could ever be the "right thing" to do - what am I
> >> missing ?
> >
> > not sure either. if you want I can apply your patch so we can try to find 
> > out.
>
> I think the patch is correct
>
> Cheers,
> Nils
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