Re: RSA key configuration limitations

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On Mon, Jun 13, 2022 at 10:32 AM Jochen Bern <Jochen.Bern@xxxxxxxxx> wrote:

> On 10.06.22 16:50, Dmitry Belyavskiy wrote:
> > There is a need to increase RSA key requirements to make the
> installations
> > more secure. Just updating the default compiled-in value isn't an option
> > because it may significantly break legacy systems compatibility. This PR
> > [1] introduces a new configuration option MinRSABits to be managed for
> > security's sake.
> >
> > If this approach is OK for upstream, please let me know and I will
> improve
> > this PR according to the feedback.
> I realize that with the *current* selection of algorithms available in
> OpenSSH, fine-grained control of minimum key size almost(!) is an
> RSA-only topic, but nonetheless I wonder whether newly-defined config
> syntax thereto should be aimed at extensibility to other cryptalgorithms
> ...

It's not a problem to implement similar parameters for DH, EC and DSA, but
does it really make sense?

Dmitry Belyavskiy
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