On Tue, 6 Jun 2017 14:39, ndk.cla...@gmail.com said: > Is it possible to "extract" the used session key, so that the requester > just ignores the asymmetric crypto and just uses the symmetric key to > decode the file? Drawbacks? Other ideas?
Here is how I would do that:
( gpg --status-fd 1 --show-session-key --max-output 1 \
-o /dev/null 2>/dev/null FILE || true ) \
| awk '$1=="[GNUPG:]" && $2=="SESSION_KEY" {print $3}'
Note that gpg exists with a failure (due to the "exceeded --max-output
limit" error message) and for extra cleanness I shortcut that error.
The output can then be used with --override-session-key
Shalom-Salam,
Werner
--
Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz.
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