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home: Add gpg-agent service.
* gnu/home/services/gnupg.scm: New file. * gnu/local.mk (GNU_SYSTEM_MODULES): Add it. * doc/guix.texi (GNU Privacy Guard): New node. (Secure Shell): Link to it.
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Ludovic Courtès
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3 changed files with 240 additions and 4 deletions
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@ -41869,11 +41869,12 @@ services)}.
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* Power Management: Power Management Home Services. Services for battery power.
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* Shepherd: Shepherd Home Service. Managing User's Daemons.
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* SSH: Secure Shell. Setting up the secure shell client.
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* GPG: GNU Privacy Guard. Setting up GPG and related tools.
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* Desktop: Desktop Home Services. Services for graphical environments.
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* Guix: Guix Home Services. Services for Guix.
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* Fonts: Fonts Home Services. Services for managing User's fonts.
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* Sound: Sound Home Services. Dealing with audio.
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* Messaging: Messaging Home Services. Services for managing messaging.
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* Messaging: Messaging Home Services. Services for managing messaging.
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* Media: Media Home Services. Services for managing media.
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@end menu
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@c In addition to that Home Services can provide
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@ -42639,15 +42640,18 @@ The @uref{https://www.openssh.com, OpenSSH package} includes a daemon,
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the @command{ssh-agent} command, that manages keys to connect to remote
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machines using the @acronym{SSH, secure shell} protocol. With the
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@code{(gnu home services ssh-agent)} service, you can configure the
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OpenSSH ssh-agent to run upon login.
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OpenSSH ssh-agent to run upon login. @xref{GNU Privacy Guard,
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@code{home-gpg-agent-service-type}}, for an alternative to OpenSSH's
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@command{ssh-agent}.
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Here is an example of a service and its configuration that you could add
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to the @code{services} field of your @code{home-environment}:
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@lisp
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(service home-ssh-agent-service-type
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(home-ssh-agent-configuration
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(extra-options '("-t" "1h30m"))))
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(home-ssh-agent-configuration
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(extra-options '("-t" "1h30m"))))
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@end lisp
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@defvar home-ssh-agent-service-type
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@ -42672,6 +42676,87 @@ Extra options will be passed to @command{ssh-agent}, please run
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@end table
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@end deftp
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@node GNU Privacy Guard
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@subsection GNU Privacy Guard
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@cindex GNU Privacy Guard, Home service
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@cindex GPG, Home service
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The @code{(gnu home services gnupg)} modules provides services that help
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you set up the GNU Privacy Guard, also known as GnuPG or GPG, in your
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home environment.
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@cindex gpg-agent, Home service
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@cindex SSH agent, with gpg-agent
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The @code{gpg-agent} service configures and sets up GPG's agent, the
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program that is responsible for managing OpenPGP private keys and,
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optionally, OpenSSH (secure shell) private keys (@pxref{Invoking
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GPG-AGENT,,, gnupg, Using the GNU Privacy Guard}).
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As an example, here is how you would configure @code{gpg-agent} with SSH
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support such that it uses the Emacs-based Pinentry interface when
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prompting for a passphrase:
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@lisp
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(service home-gpg-agent-service-type
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(home-gpg-agent-configuration
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(pinentry-program
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(file-append pinentry-emacs "/bin/pinentry-emacs"))
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(ssh-support? #t)))
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@end lisp
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The service reference is given below.
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@defvar home-gpg-agent-service-type
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This is the service type for @command{gpg-agent} (@pxref{Invoking
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GPG-AGENT,,, gnupg, Using the GNU Privacy Guard}). Its value must be a
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@code{home-gpg-agent-configuration}, as shown below.
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@end defvar
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@c %start of fragment
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@deftp {Data Type} home-gpg-agent-configuration
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Available @code{home-gpg-agent-configuration} fields are:
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@table @asis
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@item @code{gnupg} (default: @code{gnupg}) (type: file-like)
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The GnuPG package to use.
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@item @code{pinentry-program} (type: file-like)
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Pinentry program to use. Pinentry is a small user interface that
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@command{gpg-agent} delegates to anytime it needs user input for a
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passphrase or @acronym{PIN,personal identification number}
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(@pxref{Top,,, pinentry,Using the PIN-Entry}).
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@item @code{ssh-support?} (default: @code{#f}) (type: boolean)
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Whether to enable @acronym{SSH,secure shell} support. When true,
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@command{gpg-agent} acts as a drop-in replacement for OpenSSH's
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@command{ssh-agent} program, taking care of OpenSSH secret keys and
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directing passphrase requests to the chosen Pinentry program.
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@item @code{default-cache-ttl} (default: @code{600}) (type: integer)
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Time a cache entry is valid, in seconds.
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@item @code{max-cache-ttl} (default: @code{7200}) (type: integer)
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Maximum time a cache entry is valid, in seconds. After this time a
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cache entry will be expired even if it has been accessed recently.
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@item @code{default-cache-ttl-ssh} (default: @code{1800}) (type: integer)
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Time a cache entry for SSH keys is valid, in seconds.
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@item @code{max-cache-ttl-ssh} (default: @code{7200}) (type: integer)
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Maximum time a cache entry for SSH keys is valid, in seconds.
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@item @code{extra-content} (default: @code{""}) (type: raw-configuration-string)
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Raw content to add to the end of @file{~/.gnupg/gpg-agent.conf}.
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@end table
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@end deftp
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@c %end of fragment
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@node Desktop Home Services
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@subsection Desktop Home Services
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150
gnu/home/services/gnupg.scm
Normal file
150
gnu/home/services/gnupg.scm
Normal file
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@ -0,0 +1,150 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2023 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu home services gnupg)
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#:use-module (guix gexp)
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#:use-module ((guix records) #:select (match-record))
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#:use-module (gnu services)
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#:use-module (gnu services configuration)
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#:use-module (gnu home services)
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#:use-module (gnu home services shepherd)
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#:autoload (gnu packages gnupg) (gnupg pinentry)
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#:export (home-gpg-agent-configuration
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home-gpg-agent-configuration?
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home-gpg-agent-configuration-gnupg
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home-gpg-agent-configuration-pinentry-program
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home-gpg-agent-configuration-ssh-support?
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home-gpg-agent-configuration-default-cache-ttl
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home-gpg-agent-configuration-max-cache-ttl
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home-gpg-agent-configuration-max-cache-ttl-ssh
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home-gpg-agent-configuration-extra-content
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home-gpg-agent-service-type))
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(define raw-configuration-string? string?)
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;; Configuration of 'gpg-agent'.
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(define-configuration/no-serialization home-gpg-agent-configuration
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(gnupg
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(file-like gnupg)
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"The GnuPG package to use.")
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(pinentry-program
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(file-like (file-append pinentry "/bin/pinentry-curses"))
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"Pinentry program to use. Pinentry is a small user interface that
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@command{gpg-agent} delegates to anytime it needs user input for a passphrase
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or @acronym{PIN, personal identification number} (@pxref{Top,,, pinentry,
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Using the PIN-Entry}).")
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(ssh-support?
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(boolean #f)
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"Whether to enable @acronym{SSH, secure shell} support. When true,
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@command{gpg-agent} acts as a drop-in replacement for OpenSSH's
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@command{ssh-agent} program, taking care of OpenSSH secret keys and directing
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passphrase requests to the chosen Pinentry program.")
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(default-cache-ttl
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(integer 600)
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"Time a cache entry is valid, in seconds.")
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(max-cache-ttl
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(integer 7200)
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"Maximum time a cache entry is valid, in seconds. After this time a cache
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entry will be expired even if it has been accessed recently.")
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(default-cache-ttl-ssh
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(integer 1800)
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"Time a cache entry for SSH keys is valid, in seconds.")
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(max-cache-ttl-ssh
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(integer 7200)
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"Maximum time a cache entry for SSH keys is valid, in seconds.")
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(extra-content
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(raw-configuration-string "")
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"Raw content to add to the end of @file{~/.gnupg/gpg-agent.conf}."))
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(define (home-gpg-agent-configuration-file config)
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"Return the @file{gpg-agent.conf} file for @var{config}."
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(match-record config <home-gpg-agent-configuration>
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(pinentry-program default-cache-ttl max-cache-ttl
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default-cache-ttl-ssh max-cache-ttl-ssh
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extra-content)
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(mixed-text-file "gpg-agent.conf"
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"pinentry-program " pinentry-program "\n"
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"default-cache-ttl "
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(number->string default-cache-ttl) "\n"
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"max-cache-ttl "
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(number->string max-cache-ttl) "\n"
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"default-cache-ttl-ssh "
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(number->string default-cache-ttl-ssh) "\n"
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"max-cache-ttl-ssh "
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(number->string max-cache-ttl-ssh) "\n"
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extra-content)))
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(define (home-gpg-agent-shepherd-services config)
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"Return the possibly-empty list of Shepherd services for @var{config}."
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(match-record config <home-gpg-agent-configuration>
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(gnupg ssh-support?)
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;; 'gpg-agent' is started on demand by GnuPG's programs, but it has to be
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;; started explicitly when OpenSSH support is enabled (info "(gnupg) Agent
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;; Options").
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(if ssh-support?
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(let ((endpoint (lambda (name socket)
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#~(endpoint
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(make-socket-address
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AF_UNIX
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(string-append %user-runtime-dir
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"/gnupg/" #$socket))
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#:name #$name
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#:socket-directory-permissions #o700))))
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(list (shepherd-service
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(provision '(gpg-agent ssh-agent))
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(modules '((shepherd support))) ;for '%user-runtime-dir'
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(start #~(make-systemd-constructor
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(list #$(file-append gnupg "/bin/gpg-agent")
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"--supervised" "--enable-ssh-support")
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(list #$(endpoint "ssh" "S.gpg-agent.ssh")
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#$(endpoint "browser" "S.gpg-agent.browser")
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#$(endpoint "extra" "S.gpg-agent.extra")
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;; #$(endpoint "scdaemon" "S.scdaemon")
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#$(endpoint "std" "S.gpg-agent"))))
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(stop #~(make-systemd-destructor))
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(documentation "Start 'gpg-agent', the GnuPG passphrase
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agent, with support for handling OpenSSH material."))))
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'())))
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(define (home-gpg-agent-files config)
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`((".gnupg/gpg-agent.conf" ,(home-gpg-agent-configuration-file config))))
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(define (home-gpg-agent-environment-variables config)
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"Return GnuPG environment variables needed for @var{config}."
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(if (home-gpg-agent-configuration-ssh-support? config)
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`(("SSH_AUTH_SOCK"
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. "$XDG_RUNTIME_DIR/gnupg/S.gpg-agent.ssh"))
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'()))
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(define home-gpg-agent-service-type
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(service-type
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(name 'home-gpg-agent)
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(extensions
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(list (service-extension home-files-service-type
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home-gpg-agent-files)
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(service-extension home-shepherd-service-type
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home-gpg-agent-shepherd-services)
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(service-extension home-environment-variables-service-type
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home-gpg-agent-environment-variables)))
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(default-value (home-gpg-agent-configuration))
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(description
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"Configure GnuPG's agent, @command{gpg-agent}, which is responsible for
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managing OpenPGP and optionally SSH private keys. When SSH support is
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enabled, @command{gpg-agent} acts as a drop-in replacement for OpenSSH's
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@command{ssh-agent}.")))
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@ -91,6 +91,7 @@ GNU_SYSTEM_MODULES = \
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%D%/home/services/desktop.scm \
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%D%/home/services/symlink-manager.scm \
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%D%/home/services/fontutils.scm \
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%D%/home/services/gnupg.scm \
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%D%/home/services/guix.scm \
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%D%/home/services/media.scm \
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%D%/home/services/messaging.scm \
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