From ba42cfca8631fb719716c0d3216ca4c983aa62e5 Mon Sep 17 00:00:00 2001
From: Timo Wilken
Date: Sun, 25 Aug 2024 14:20:47 +0200
Subject: Allow encrypting secrets to multiple hosts at the same time

---
 regenerate-secrets.sh | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/regenerate-secrets.sh b/regenerate-secrets.sh
index a93b4488..b0c0c3fc 100755
--- a/regenerate-secrets.sh
+++ b/regenerate-secrets.sh
@@ -1,20 +1,27 @@
-#!/bin/sh -e
+#!/usr/bin/env -S bash -e
 
-encto () {
+enc () {
   # Overwriting an existing encrypted file will change its content, even if
   # its decrypted content does not change, so leave it alone.
-  [ -e "$2" ] && return 0
-  hostkey=$(awk '$1 ~ /^\[?'"$1"'\.(twilken\.net|local|fritz\.box)\]?(:[0-9]+)?$/ && $2 == "ssh-ed25519" { print $2, $3 }' ~/.ssh/known_hosts)
-  mkdir -p "$(dirname "$2")"
-  age -e -a -r "${hostkey:?No hostkey found for $1}" -o "$2"
+  local destination=$1; shift
+  [ -e "$destination" ] && return 0
+  local age_recipients=()
+  while [ $# -gt 0 ]; do
+    recipient=$1; shift
+    hostkey=$(awk '$1 ~ /^\[?'"$recipient"'\.(twilken\.net|local|fritz\.box)\]?(:[0-9]+)?$/ && $2 == "ssh-ed25519" { print $2, $3 }' ~/.ssh/known_hosts)
+    age_recipients+=(-r "${hostkey:?No hostkey found for $recipient}")
+  done
+  mkdir -p "$(dirname "$destination")"
+  age -e -a -o "$destination" "${age_recipients[@]}"
 }
 
 store () {
+  local recipient=$1 key=$2 destination=$3
   # Overwriting an existing encrypted file will change its content, even if
   # its decrypted content does not change, so leave it alone.
-  [ -e "$3" ] && return 0
-  pass show "$2" > /dev/null || return 1
-  pass show "$2" | head -1 | encto "$1" "$3"
+  [ -e "$destination" ] && return 0
+  pass show "$key" > /dev/null || return 1
+  pass show "$key" | head -1 | enc "$recipient" "$destination"
 }
 
 store_restic () {
@@ -42,20 +49,20 @@ store_restic lud lud-git
 
 store lud www/nextcloud/database tw/system/files/nextcloud-database-password.enc
 
-encto lud tw/system/files/mythic-dns.scm.enc << EOF
+enc tw/system/files/mythic-dns.scm.enc lud << EOF
 "$(pass show www/mythic-beasts/dns-lud | sed -rn '/^username: /s///p')"  ; username
 "$(pass show www/mythic-beasts/dns-lud | head -1)"  ; password
 EOF
 
-encto vin tw/system/files/grafana/metrics-credentials.enc << EOF
+enc tw/system/files/grafana/metrics-credentials.enc vin << EOF
 GF_METRICS_BASIC_AUTH_USERNAME=$(pass show computers/vin/grafana/metrics | sed -rn '/^username: /s///p')
 GF_METRICS_BASIC_AUTH_PASSWORD=$(pass show computers/vin/grafana/metrics | head -1)
 EOF
 
-encto lud tw/system/files/paperless-secret-key.enc << EOF
+enc tw/system/files/paperless-secret-key.enc lud << EOF
 PAPERLESS_SECRET_KEY=$(pass show computers/lud/paperless/secret-key | head -1)
 EOF
 
-encto vin tw/services/files/personal-data-exporter/conso.json << EOF
+enc tw/services/files/personal-data-exporter/conso.json vin << EOF
 {"prm": "$(pass www/conso-api | sed -rn '/^prm: /s///p')", "api-token": "$(pass www/conso-api | head -1)"}
 EOF
-- 
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