VAPID: the two values are the halves of one P-256 keypair, not independent
secrets — the browser verifies that a push is signed by the private key matching
the public key it subscribed with. The RANDOMIZED* generators mint each
placeholder on its own, so they produced two unrelated strings and web push could
never have worked. Generate the pair in mastodon_install_post_setup the way stoat
already does, encoded as Mastodon's webpush gem expects: unpadded URL-safe base64
of the 32-byte private scalar and the 65-byte uncompressed public point, sliced
out of the SEC1 DER. Verified by rebuilding the key from the emitted private half
and re-deriving the public point — openssl accepts it and the point matches.
Generated once and never rotated (rotation would invalidate every subscription),
but a pair of the wrong shape is replaced, so an install carrying the old
unrelated strings heals itself on next install — their public half is 42 chars
where a real point is 87.
Slots: CFG_<APP>_DB_PASSWORD -> CFG_<APP>_DB_PASSWORD_1 and likewise for
DB_ROOT_PASSWORD, across mastodon, owncloud, mattermost, matrix, nextcloud and
bookstack, so a database credential is always a numbered slot and a second one is
just _2. Renaming a key means reconciliation drops the old and adds the new
holding its placeholder, so an existing install regenerates unless the value is
carried over first — documented, including that the old file survives as
.<app>.config.bak.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Five apps (mastodon, owncloud, mattermost, matrix, stoat) took their generated
secrets from the compose-side generator tags PASSWORD_TAG_<n>/RANDOM_TAG_<n>/
HEX_TAG_<n>/VAPID_TAG_<n>. Those mint a fresh secret on every templating run, so
a reinstall handed the app a new database password while its data volume kept the
one initdb was given, and the app came back up unable to open its own database.
Move them to <app>.config as RANDOMIZED* placeholders, reaching the compose via
the #LIBREPORTAL|<APP>_<KEY>_TAG| mechanism tags_processor_app_config_values
already provides. No new handler: the tag name is derived from the config key, so
this is a config line plus a tag per secret. Generation is unchanged — still
random on first install; the value is now remembered instead of re-rolled.
Also fixes two things this exposed:
- The RANDOMIZED* replacers matched unanchored. `sort -u` orders slots lexically
(1, 10, 11, 2), so slot 1's pattern rewrote the prefix inside slot 10's
placeholder and slots 10+ ended up holding slot 1's secret with a digit glued
on — derivable, and invisible because the values weren't byte-identical.
Anchoring with \b makes match order irrelevant. Verified at 20 slots across
all four placeholder types: 64 keys, 64 distinct values, no prefix collisions.
- generateRandomPassword drew from base64 without constraining the mix; measured
over 2000 draws, 1 in 40 contained no digit at all. Retry until the result has
both a digit and a letter, bounded so a pathological length can't spin.
owncloud gains a fix in passing: its compose seeded the admin account from
PASSWORD_TAG_2 while the WebUI displayed CFG_OWNCLOUD_ADMIN_PASSWORD, which was
generated separately and never used. Both now read the same value.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
One container against Postgres, with the polished desktop and mobile clients
that make it the least demanding of the four chat options.
Runs as the bind-mount owner via USER_TAG: the image bakes in USER mattermost
(uid 2000) so it never runs as root and cannot chown its own data directory,
which under rootless Docker means it dies on first write.
CFG_MATTERMOST_AUTHELIA stays false — OIDC/SAML is a paid tier here, so
forward-auth would block the native clients from the API without buying single
sign-on in exchange.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
