diff options
| author | Daniel Kahn Gillmor <dkg@fifthhorseman.net> | 2019-03-23 13:35:43 +0100 |
|---|---|---|
| committer | David Bremner <david@tethera.net> | 2019-03-27 17:53:41 -0300 |
| commit | 01f9c71312937011c4474688d3d1dd64c14731fb (patch) | |
| tree | 3c0a6dac397673f4455eea645ae361447cba9a1c /Makefile.local | |
| parent | cc8d837d5a137a14a62526dcea60af1de7a353e4 (diff) | |
build: distribute signed sha256sums
Distribute clearsigned sha256sum file in addition to the detached
signature.
Verifies that use the sha256sum ensure that the thing signed includes
the name of the tarball. This defends the verifier by default against
a freeze, rollback, or project substitution attack.
A verifier can use something like the following (as expressed in
bash):
set -o pipefail
wget https://notmuchmail.org/releases/notmuch-$VERSION.tar.gz{,.sha256.asc}
gpgv --keyring ./notmuch-signers.pgp --output - notmuch-$VERSION.tar.gz.sha256.asc | sha256sum -c -
See id:87r2b8w956.fsf@fifthhorseman.net and other messages in that
thread for discussion.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Diffstat (limited to 'Makefile.local')
| -rw-r--r-- | Makefile.local | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile.local b/Makefile.local index 8535844a..eb599565 100644 --- a/Makefile.local +++ b/Makefile.local @@ -40,7 +40,7 @@ $(TAR_FILE): @echo "Source is ready for release in $(TAR_FILE)" $(SHA256_FILE): $(TAR_FILE) - sha256sum $^ > $@ + sha256sum $^ | gpg --clear-sign --output $@ - $(GPG_FILE): $(TAR_FILE) gpg --armor --detach-sign $^ |