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94 lines
2.3 KiB
Markdown
94 lines
2.3 KiB
Markdown
# sys-pgp
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PGP operations through Qrexec in Qubes OS.
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## Table of Contents
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* [Description](#description)
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* [Installation](#installation)
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* [Access Control](#access-control)
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* [Usage](#usage)
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## Description
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Creates a PGP key holder named "sys-pgp", it will be the default target for
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split-gpg and split-gpg2 calls for all qubes. Keys are stored in "sys-pgp",
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and access to them is made from the client through Qrexec.
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## Installation
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* Top:
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```sh
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sudo qubesctl top.enable sys-pgp
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sudo qubesctl --targets=tpl-sys-pgp,sys-pgp state.apply
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sudo qubesctl top.disable sys-pgp
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sudo qubesctl state.apply sys-pgp.prefs
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```
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* State:
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<!-- pkg:begin:post-install -->
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```sh
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sudo qubesctl state.apply sys-pgp.create
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sudo qubesctl --skip-dom0 --targets=tpl-sys-pgp state.apply sys-pgp.install
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sudo qubesctl --skip-dom0 --targets=sys-pgp state.apply sys-pgp.configure
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sudo qubesctl state.apply sys-pgp.prefs
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```
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<!-- pkg:end:post-install -->
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Install on the client template:
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```sh
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sudo qubesctl --skip-dom0 --targets=tpl-qubes-builder,tpl-dev state.apply sys-pgp.install-client
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```
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The client qube requires the split GPG client service to be enabled:
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```sh
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qvm-features QUBE service.split-gpg2-client 1
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```
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## Access Control
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_Default policy_: `any qube` can `ask` via the `@default` target if you allow
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it to use split-gpg in `sys-pgp`.
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Allow the `work` qubes to access `sys-pgp`, but not other qubes:
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```qrexecpolicy
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qubes.Gpg2 * work sys-pgp ask default_target=sys-pgp
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qubes.Gpg2 * work @default ask target=sys-pgp default_target=sys-pgp
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qubes.Gpg2 * @anyvm @anyvm deny
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```
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## Usage
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Consult [upstream documentation](https://github.com/QubesOS/qubes-app-linux-split-gpg2)
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on how to use split-gpg2.
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Save your PGP keys to `sys-pgp`, using isolated GnuPG home directory per qube
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at `~/.gnupg/split-gpg/<QUBE>`.
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On `dom0`, enabled the service `split-gpg2-client` for the client qube `dev`:
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```sh
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qvm-features dev service.split-gpg2-client 1
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```
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On the qube `sys-pgp`, generate or import keys for the client qube `dev`:
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```sh
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mkdir -p -- ~/.gnupg/split-gpg/dev
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gpg --homedir ~/.gnupg/split-gpg/dev --import /path/to/secret.key
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gpg --homedir ~/.gnupg/split-gpg/dev --list-secret-keys
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```
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On the qube `dev`, import the public part of your key:
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```sh
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gpg --import /path/to/public.key
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```
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