#20611: More functions for mq.SBox and helper to build a Feistel/MISTY
constructed
S-Box
-------------------------------------+-------------------------------------
Reporter: ruhm | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.3
Component: cryptography | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/ruhm/improved_sbox | 4ed0b5dd1e63614d587f9d3c3408c9489097e874
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by ruhm):
Hi,
Thanks for looking at the code. I have applied your suggestion on both
is_bent() and is_almost_bent(). Btw, can you review this ticket ?
Replying to [comment:4 ylchapuy]:
> Hi,\\
> You might want to use more pythonic syntax e.g.
>
>
> {{{#!python
> def substitute(x):
> mask = (1 << b) - 1
> xl = (x >> b) & mask
> xr = x & mask
> for sb in sboxes:
> xl, xr = sb(xl) ^ xr, xl
> return (xl << b) | xr
> }}}
>
> also in my opinion {{{is_bent}}} should return {{{False}}} instead of
raising {{{ValueError}}}.
> ----
> New commits:
>
||[https://git.sagemath.org/sage.git/commit?id=5ed03fa7ae556771adb834714b864d6c2c64c0bd
5ed03fa]||{{{initial commit}}}||
>
||[https://git.sagemath.org/sage.git/commit?id=96832f793fec97e01c56948c8f288753b5fe3c56
96832f7]||{{{merge develop with t/20611/improved_sbox}}}||
--
Ticket URL: <https://trac.sagemath.org/ticket/20611#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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