Selection of digest algorithm

John Clizbe John at
Thu Jan 29 01:46:52 CET 2009

Sven Radde wrote:
> First, when sending a signed email from Evolution, SHA1 seems to be
> chosen, no matter what "personal-digest-preferences" or even
> "digest-algo" is set in the gpg.conf file (other parts of gpg.conf are
> honored, however).
> Is this a limitation of the PGP/MIME standard that Evolution uses?

Sort of... maybe. For PGP/MIME it is necessary to know the hash used when
constructing the message, before it is passed off for signing.

Enigmail fixed this some time ago by first signing and examining a small test
message to obtain the hash which will be used.

I guess the Evo folks "fixed" it by always using SHA-1.

John P. Clizbe                      Inet:John (a)
You can't spell fiasco without SCO. hkp://  or
     mailto:pgp-public-keys at

Q:"Just how do the residents of Haiku, Hawai'i hold conversations?"
A:"An odd melody / island voices on the winds / surplus of vowels"

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