determine encryption key without trying to decrypt

[kwadronaut at aktivix.org]

Hi,

Quoting Hauke Laging <mailinglisten at hauke-laging.de>:
> how can I determine the key(s) for which a file has been encrypted  
> without gpg
> trying to decrypt the file? I don't understand why --list-packets tries to
> decrypt it anyway. --batch and --no-tty do not solve the problem.

Because of the --hidden-recipient (or --hidden-encrypt-to name)  
functionality, you're sort-of obliged to simply throw whatever secret  
keys you have at it and hopefully be able to decrypt it. Why don't you  
use the option from the faq [1], is there something wrong with:

  gpg --batch --decrypt --list-only --status-fd 1 2>/dev/null | \
   awk '/^\[GNUPG:\] ENC_TO / { print $3 }'


Ciao,
kwadronaut

[1]  
http://www.gnupg.org/faq/GnuPG-FAQ.html#how-can-i-get-list-of-key-ids-used-to-encrypt-a-message