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Subject: Re: [gentoo-user] How does ssh know to use "pinentry"?
From: Rich Freeman <rich0@gentoo.org>
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On Sun, Jul 6, 2014 at 8:40 PM, Chris Stankevitz
<chrisstankevitz@gmail.com> wrote:
>
> On another note, from my OP, I am still curious how the ssh software
> knows to use /usr/bin/pinentry to fetch my passphrase.  In a follow-up
> post, I discovered that this mechanism only works if an environment
> variable called GPG_AGENT_INFO is set.  I doubt the ssh source code
> contains the string "/usr/bin/pinentry" or "GPG_AGENT_INFO".

GPG_AGENT_INFO tells ssh to use gpg-agent.  ~/.gnupg/gpg-agent.conf
tells gpg-agent to use pinentry.

Rich