LibrePortal/scripts/config/password/password_replace vapid.sh
librelad 5706498565 fix(secrets): move app credentials into <app>.config, fix slot collision
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>
2026-08-18 19:33:40 +01:00

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#!/bin/bash
replaceVAPIDKeys()
{
local file="$1"
# Only scan for VAPID placeholders that actually exist in the file
local existing_placeholders=$(runCfgOp grep -oE 'RANDOMIZEDVAPID[0-9]*' "$file" 2>/dev/null | sort -u)
# \b on the substitution below: `sort -u` orders slots lexically (1, 10, 11,
# 2), so without it slot 1's pattern matches inside slot 10's placeholder and
# slots 10+ end up holding slot 1's secret with a digit appended. See
# password_replace.sh for the full description.
if [[ -n "$existing_placeholders" ]]; then
while IFS= read -r placeholder; do
if [[ -n "$placeholder" ]]; then
local vapid_key
vapid_key=$(openssl rand -base64 32 | tr -d '+/=' | tr -cd '[:alnum:]')
runCfgOp sed -i "s/${placeholder}\\b/${vapid_key}/g" "$file"
checkSuccess "Updated ${placeholder} in $(basename "$file") with a new VAPID key."
fi
done <<< "$existing_placeholders"
fi
}