Confusion about gpg-preset-passphrase

[Efe İzbudak]

On 23/03/03 03:09PM, Ingo Klöcker wrote:
> On Freitag, 3. März 2023 13:09:09 CET efeizbudak via Gnupg-users wrote:
> > So I'm trying to use gpg-preset-passphrase but for some reason I keep
> > having to enter the passphrase all the same. I run
> > 
> > /usr/libexec/gpg-preset-passphrase --preset $KEYGRIP
> 
> Works for me (with the current development version). I did the following 
> (after adding `allow-preset-passphrase` to gpg-agent.conf and restarting
> gpg-agent):
> 
> $ gpg -K --with-keygrip A151BC5817C228CF
> sec   ed25519 2021-02-26 [SC]
>       69C701A436FDD496FAE5580AA151BC5817C228CF
>       Keygrip = 382BC7C2C4E13EF7D40870B7EB9CDE4AE0232B4E
> uid           [ultimate] foo at example.net
> ssb   cv25519 2021-02-26 [E]
>       Keygrip = B9386D3E742597E532C6BD0978192517A09B41C3
> 
> $ echo bla | gpg --armor --encrypt -r A151BC5817C228CF | gpg --decrypt
> -> pinentry pops up; I click Cancel
> gpg: encrypted with cv25519 key, ID 14AC6E5C812B91E1, created 2021-02-26
>       "foo at example.net"
> gpg: public key decryption failed: Operation cancelled
> gpg: decryption failed: Operation cancelled
> 
> $ /opt/gnupg/master/libexec/gpg-preset-passphrase --preset \ 
> B9386D3E742597E532C6BD0978192517A09B41C3
> test
> 
> $ echo bla | gpg --armor --encrypt -r A151BC5817C228CF | gpg --decrypt
> -> no pinentry pops up
> gpg: encrypted with cv25519 key, ID 14AC6E5C812B91E1, created 2021-02-26
>       "foo at example.net"
> bla
> 
> Are you sure that you used the keygrip of the encryption subkey and not its 
> fingerprint? Does caching work if you enter the passphrase in pinentry? (I'm 
> asking because I'm wondering whether your max-cache-ttl could be the problem.)
> 
> Regards,
> Ingo

After seeing your example, I thought, why don't I test this with a
simpler password and it turns out that the problem was with my very
complicated auto-generated password which I believe have contained some
characters that were "illegal." Everything works fine with the simpler
password. Thank you for spending time on this. Sorry for not noticing it
earlier.

-- 
All the best,
Efe

The funny quote of this email is trivial and left as an exercise.
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