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maint: Suggest ‘guix git authenticate’ for initial authentication.

Browse source 
The previous recommendation, running ‘make authenticate’, was insecure
because it led users to run code from the very repository they want to
authenticate:

  https://lists.gnu.org/archive/html/guix-devel/2024-04/msg00252.html

* Makefile.am (commit_v1_0_0, channel_intro_commit)
(channel_intro_signer, GUIX_GIT_KEYRING, authenticate): Remove.
* Makefile.am (.git/hooks/%): New target, generalization of previous
‘.git/hooks/pre-push’ target.
(nodist_noinst_DATA): Add ‘.git/hooks/post-merge’.
* doc/contributing.texi (Building from Git): Suggest ‘guix git
authenticate’ instead of ‘make authenticate’.
* etc/git/post-merge: New file.
* etc/git/pre-push: Run ‘guix git authenticate’ instead of ‘make
authenticate’.

Reviewed-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Reported-by: Skyler Ferris <skyvine@protonmail.com>
Change-Id: Ia415aa8375013d0dd095e891116f6ce841d93efd
This commit is contained in:
Ludovic Courtès 2024-05-07 15:54:44 +02:00
parent 0efa1daad3
commit 73b3f941d7
No known key found for this signature in database
GPG key ID: 090B11993D9AEBB5
4 changed files with 38 additions and 29 deletions
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30
Makefile.am
View file

@ -1,5 +1,5 @@
# GNU Guix --- Functional package management for GNU
# Copyright © 2012-2023 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2012-2024 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2013 Andreas Enge <andreas@enge.fr>
# Copyright © 2015, 2017 Alex Kost <alezost@gmail.com>
# Copyright © 2016, 2018 Mathieu Lirzin <mthl@gnu.org>
@ -899,22 +899,6 @@ $(guix_install_go_files): install-nobase_dist_guilemoduleDATA
install-data-hook:
touch "$(DESTDIR)$(guileobjectdir)/guix/config.go"
# Commit corresponding to the 'v1.0.0' tag.
commit_v1_0_0 = 6298c3ffd9654d3231a6f25390b056483e8f407c
# Introduction of the 'guix' channel. Keep in sync with (guix channels)!
channel_intro_commit = 9edb3f66fd807b096b48283debdcddccfea34bad
channel_intro_signer = BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA
# Authenticate the current Git checkout by checking signatures on every commit.
GUIX_GIT_KEYRING = origin/keyring
authenticate:
$(AM_V_at)echo "Authenticating Git checkout..." ; \
guix git authenticate \
--keyring=$(GUIX_GIT_KEYRING) \
--cache-key=channels/guix --stats \
"$(channel_intro_commit)" "$(channel_intro_signer)"
# Assuming Guix is already installed and the daemon is up and running, this
# rule builds from $(srcdir), creating and building derivations.
as-derivation:
@ -1231,13 +1215,13 @@ cuirass-jobs: $(GOBJECTS)
.PHONY: gen-ChangeLog gen-AUTHORS gen-tarball-version
.PHONY: assert-no-store-file-names assert-binaries-available
.PHONY: assert-final-inputs-self-contained check-channel-news
.PHONY: clean-go make-go as-derivation authenticate
.PHONY: clean-go make-go as-derivation
.PHONY: update-guix-package update-NEWS cuirass-jobs release
# Git auto-configuration.
.git/hooks/pre-push: etc/git/pre-push
.git/hooks/%: etc/git/%
$(AM_V_at)if test -d .git; then \
cp etc/git/pre-push .git/hooks/pre-push; \
cp "$<" "$@"; \
fi
.git/config: etc/git/gitconfig
@ -1260,7 +1244,11 @@ COMMIT_MSG_MAGIC = VGhpcyBpcyB0aGUgY29tbWl0LW1zZyBob29rIG9mIEd1aXg=
# from a tarball. Do not add dependencies on these to *_DATA when building
# from a tarball, as that breaks the build.
if in_git_p
nodist_noinst_DATA = .git/hooks/pre-push .git/config .git/hooks/commit-msg
nodist_noinst_DATA = \
.git/hooks/pre-push \
.git/hooks/post-merge \
.git/config \
.git/hooks/commit-msg
endif
# Downloading up-to-date PO files.

30
doc/contributing.texi
View file

@ -276,25 +276,41 @@ From there on, you can authenticate all the commits included in your
checkout by running:
@example
make authenticate
guix git authenticate \
9edb3f66fd807b096b48283debdcddccfea34bad \
"BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA"
@end example
The first run takes a couple of minutes, but subsequent runs are faster.
On subsequent runs, you can run the command without any arguments since
the @dfn{introduction} (the commit ID and OpenPGP fingerprints above)
will have been recorded@footnote{This requires a recent version of Guix,
from May 2024 or more recent.}:
Or, when your configuration for your local Git repository doesn't match
@example
guix git authenticate
@end example
When your configuration for your local Git repository doesn't match
the default one, you can provide the reference for the @code{keyring}
branch through the variable @code{GUIX_GIT_KEYRING}. The following
branch @i{via} the @option{-k} option. The following
example assumes that you have a Git remote called @samp{myremote}
pointing to the official repository:
@example
make authenticate GUIX_GIT_KEYRING=myremote/keyring
guix git authenticate \
-k myremote/keyring \
9edb3f66fd807b096b48283debdcddccfea34bad \
"BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA"
@end example
@xref{Invoking guix git authenticate}, for more information on this
command.
@quotation Note
You are advised to run @command{make authenticate} after every
@command{git pull} invocation. This ensures you keep receiving valid
changes to the repository.
By default, hooks are installed such that @command{guix git
authenticate} is invoked anytime you run @command{git pull} or
@command{git push}.
@end quotation
After updating the repository, @command{make} might fail with an error

3
etc/git/post-merge Executable file
View file

@ -0,0 +1,3 @@
#!/bin/sh
# Authenticate the repo upon 'git pull' and similar.
exec guix git authenticate

4
etc/git/pre-push
View file

@ -32,7 +32,9 @@ do
# Only use the hook when pushing to Savannah.
case "$2" in
*.gnu.org*)
exec make authenticate check-channel-news
set -e
make check-channel-news
exec guix git authenticate
exit 127
;;
*)