Information on a gpg encrypted file

[Andreas Mattheiss]

Hello,

I wonder if there is a utility that, when fed a gpg-encrypted-message,
will tell me which key is needed, which compression/cipher/hash was used.

Regards
Andreas

-- 
RIMMER: Lister, we'd be fools not to listen to him. When is he ever
wrong? Alright, he may have a head shaped like an inexplicably popular
fishing float but he does operate from a position of total logic and
we'd be fools to ignore his sage council.
KRYTEN:At least let me and Mister Rimmer go in your place. We are after
all merely electronic life forms and therefore expendable.
RIMMER: And what the smeg would you know, bog-bot from hell?