Autocrypt

Eike Rathke list at erack.de
Mon Aug 12 22:56:37 UTC 2019


Hi Kevin,

On Monday, 2019-08-12 09:07:49 -0700, Kevin J. McCarthy wrote:

> On Mon, Aug 12, 2019 at 11:57:14AM +0200, Eike Rathke wrote:
> > Tried (then it needs to be done with --export-secret-keys not --export,
> > of course..) with 6 of 12 uids but that didn't change anything. I think
> > the size is merely due to the rsa4096 used on that key.
> 
> How many lines is the Autocrypt header, again?  I've seen other rsa4096 keys
> where the header is around 45 lines.  GPGME_EXPORT_MODE_MINIMAL should be
> removing all extraneous signatures, so there is no reason for it to be much
> bigger than that.

So, this is completely odd and appears to be some bug. I verified that
gpg --homedir ~/.mutt/autocrypt -K  (and -k as well) both list 6 mbox
addresses. The Autocrypt header of a mail written from such address is
203 lines, 15585 bytes with folding, I piped it through

  formail -cxAutocrypt: | sed -e 's/.*keydata=//;s/[ \t]//g' | base64 -d | gpg --homedir testdir --import

and then  gpg --homedir testdir -k   lists the 12 (!) addresses of the
original key. It seems that the Autocrypt header content for an existing
key is pulled from the original keyring and not the ~/.mutt/autocrypt
keyring.

  Eike

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