Colin's git trees - cmccabe-bin/blob - passtool.sh

   1 #!/usr/bin/env bash
   2
   3 die() {
   4     echo $1
   5     exit 1
   6 }
   7
   8 usage()
   9 {
  10     cat <<EOF
  11 $0: a tool for dealing with passwords.
  12
  13 Flags:
  14 -f [path]: specify the password file to use.
  15 -h: this help message.
  16 -s [pattern]: search for the given pattern
  17
  18 Environment variables:
  19 EDITOR: the editor to use.
  20 EOF
  21 }
  22
  23 TEMPDIR="/dev/shm/passtool.$$.$RANDOM"
  24 EDITOR=${EDITOR:-vi}
  25 mkdir -p "${TEMPDIR}" || die "failed to mkdir ${TEMPDIR}"
  26 TEMPFILE="${TEMPDIR}/temp"
  27 TEMPFILE_ENC="${TEMPDIR}/temp.nc"
  28 trap "rm -rf ${TEMPDIR}; exit" EXIT
  29 #chmod 007 "${TEMPDIR}" || die "failed to chmod ${TEMPDIR}"
  30
  31 SEARCH_PATTERN=""
  32 while getopts  "f:hs:" flag; do
  33     case $flag in
  34         f)  PASSWORD_PATH="${OPTARG}";;
  35         h)  usage; exit 0;;
  36         s)  SEARCH_PATTERN="${OPTARG}";;
  37         *)  echo; usage; exit 1;;
  38     esac
  39 done
  40
  41 [[ -z ${PASSWORD_PATH} ]] && die "You must specify a password file path with -f"
  42 [[ -f ${PASSWORD_PATH} ]] || die "No regular file found at ${PASSWORD_PATH}"
  43
  44 if [[ -z ${PASSWORD} ]]; then
  45     read -s -p "enter password: " PASSWORD
  46 fi
  47 if openssl enc -d -aes-256-ecb -k "${PASSWORD}" \
  48         < "${PASSWORD_PATH}" > "${TEMPFILE}"; then
  49     if [[ -z ${SEARCH_PATTERN} ]]; then
  50         ${EDITOR} "${TEMPFILE}"
  51         openssl enc -aes-256-ecb -k "${PASSWORD}" -salt \
  52                     < "${TEMPFILE}" > "${TEMPFILE_ENC}" ||
  53             die "Re-encryption failed.  Changes lost."
  54         mv -f "${TEMPFILE_ENC}" "${PASSWORD_PATH}" || \
  55             die "failed to move ${TEMPFILE_ENC} to ${PASSWORD_PATH}: changes lost."
  56     else
  57         echo
  58         egrep ${SEARCH_PATTERN} "${TEMPFILE}"
  59     fi
  60 else
  61     die "Failed to decrypt ${PASSWORD_PATH}.  Was the password correct?"
  62 fi