Using SHA256/512 for SQL based password

Matthias Fechner idefix at
Wed Feb 13 08:23:01 EET 2019

Am 13. Februar 2019 00:34:15 schrieb Robert Moskowitz <rgm at>:

> On 2/12/19 6:03 PM, Matthias Fechner via dovecot wrote:
>> Am 12.02.2019 um 17:05 schrieb Robert Moskowitz via dovecot:
>>> I have trying to find how to set the dovecot-sql.conf for using
>>> SHA256/512.  I am going to start clean with the stronger format, not
>>> migrate from the old MD5.  It seems all I need is:
>> you maybe would like to have a look to the hashing algo ARGON2I which is
>> currently recommended for new developments and deployments.
> Recommended by whom?
> Can you provide a link?

Sure, please see here:

> And if I was adventurous about hashes, I would be looking more at Keccak.
> Check out my Internet Draft:
> draft-moskowitz-small-crypto-00.txt

Thanks for the tip, will have a look for into it.


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