From 85007db580ccf662a45cf2aaeb83518ad2ddb85a Mon Sep 17 00:00:00 2001
From: Cullum Smith <cullum@sacredheartsc.com>
Date: Thu, 11 Jul 2024 10:55:45 -0400
Subject: initial boxconf scaffolding

---
 vault | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100755 vault

(limited to 'vault')

diff --git a/vault b/vault
new file mode 100755
index 0000000..5f0094f
--- /dev/null
+++ b/vault
@@ -0,0 +1,121 @@
+#!/bin/sh
+#
+# Utility to manage encrypted files using OpenSSL's pbkdf2.
+
+set -eu
+
+PROGNAME=vault
+USAGE="${PROGNAME} <check|create|decrypt|edit|encrypt|reencrypt|> FILE..."
+BOXCONF_ROOT=$(dirname "$(readlink -f "$0")")
+
+usage(){
+  printf 'usage: %s\n' "$USAGE" 2>&1
+  exit 2
+}
+
+vault_check(){
+  while [ $# -gt 0 ]; do
+    if [ ! -f "$1" ]; then
+      warn "file does not exist: ${1}"
+    elif _boxconf_is_encrypted "$1"; then
+      echo "${1} is encrypted"
+    else
+      echo "${1} is not encrypted"
+    fi
+    shift
+  done
+}
+
+vault_create(){
+  _boxconf_get_vault_password
+  if [ -e "$1" ]; then
+    die "file already exists: ${1}"
+  else
+    "$EDITOR" "$TMPFILE"
+    PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$TMPFILE" -out "$1" -e "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+  fi
+}
+
+vault_decrypt(){
+  _boxconf_get_vault_password
+  while [ $# -gt 0 ]; do
+    if [ ! -f "$1" ]; then
+      warn "file does not exist: ${1}"
+    elif ! _boxconf_is_encrypted "$1"; then
+      warn "file is not encrypted: ${1}"
+    else
+      PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$1" -d "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+    fi
+    shift
+  done
+}
+
+vault_edit(){
+  _boxconf_get_vault_password
+  while [ $# -gt 0 ]; do
+    if [ ! -f "$1" ]; then
+      warn "file does not exist: ${1}"
+    elif ! _boxconf_is_encrypted "$1"; then
+      warn "file is not encrypted: ${1}"
+    else
+      PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$1" -out "$TMPFILE" -d "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+      "$EDITOR" "$TMPFILE"
+      PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$TMPFILE" -out "$1" -e "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+    fi
+    shift
+  done
+}
+
+vault_encrypt(){
+  _boxconf_get_vault_password
+  while [ $# -gt 0 ]; do
+    if [ ! -f "$1" ]; then
+      warn "file does not exist: ${1}"
+    elif _boxconf_is_encrypted "$1"; then
+      warn "file is already encrypted, refusing: ${1}"
+    else
+      PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$1" -out "$TMPFILE" -e "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+      cp "$TMPFILE" "$1"
+    fi
+    shift
+  done
+}
+
+vault_reencrypt(){
+  _boxconf_get_vault_password
+
+  [ -n "${VAULT_NEW_PASSWORD:-}" ] \
+    || _boxconf_read_password 'Enter new vault password: ' VAULT_NEW_PASSWORD
+
+  while [ $# -gt 0 ]; do
+    if [ ! -f "$1" ]; then
+      warn "file does not exist: ${1}"
+    elif ! _boxconf_is_encrypted "$1"; then
+      warn "file is not encrypted: ${1}"
+    else
+      PASS=$BOXCONF_VAULT_PASSWORD openssl enc -in "$1" -out "$TMPFILE" -d "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+      PASS=$VAULT_NEW_PASSWORD openssl enc -in "$TMPFILE" -out "$1" -e "-${BOXCONF_VAULT_CIPHER}" -pass env:PASS -pbkdf2
+    fi
+    shift
+  done
+}
+
+[ $# -gt 1 ] || usage
+action=$1; shift
+
+for _bc_lib in "${BOXCONF_ROOT}/lib"/*; do
+  . "$_bc_lib"
+done
+
+TMPFILE=$(mktemp)
+trap 'rm -f "$TMPFILE"' HUP INT QUIT TERM EXIT
+
+case $action in
+  check)     vault_check "$@" ;;
+  create)    vault_create "$@" ;;
+  decrypt)   vault_decrypt "$@" ;;
+  edit)      vault_edit "$@" ;;
+  encrypt)   vault_encrypt "$@" ;;
+  reencrypt) vault_reencrypt "$@" ;;
+  *)         usage ;;
+esac
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