blacklisting MD5 in gpg [was: Re: un-trusting MD5 in gpg]

Daniel Kahn Gillmor dkg at
Thu May 7 16:37:47 CEST 2009

On 05/07/2009 04:57 AM, Werner Koch wrote:
> On Thu,  7 May 2009 00:04, dshaw at said:
> I would prefer
>   --blacklist-digest-algo NAME_or_NUMBER
> The reason is that we do not need a specific order as with
> personal-digest-preferences.  It makes implementation (cf. gpgconf)
> easier and better matches other options related to algorithms.

So if gpg eventually decides to blacklist MD5 by default, and a user
throws caution to the winds and decides that they simply must rely on
(or create) signatures over MD5, they'd do:

 --no-blacklist-digest-algo MD5

is that right?

Should gpg --version somehow indicate algorithms which it knows about
but which are blacklisted in the current configuration?


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