Caching symmetric encryption passphrase with gpg-agent
ueno at unixuser.org
Mon Mar 16 10:23:52 CET 2009
>>>>> In <87tz67arx7.fsf at wheatstone.g10code.de>
>>>>> Werner Koch <wk at gnupg.org> wrote:
> Using the salt as a cache id is a clever idea. That allows to decrypt a
> message during the caching time without entering the passphrase again.
> I am not sure whether there is a use case for this.
As a developer of the Emacs interface, I have frequently been asked how
to cache the passphrase for symmetric encryption, and I eventually added
a special option epa-file-cache-passphrase-for-symmetric-encryption.
So I'm confident that those who are reluctant to generate public keys
just for caching passphrases will be happy if the caching is implemented
in the gpg-agent level.
> Reusing the salt for another message defeats the purpose of the salt and
> thus makes no sense.
I see. I will try to polish my patch not including the salt-reusing
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