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

   1 #!/usr/bin/env bash
   2
   3 die() {
   4     echo $@
   5     exit 1
   6 }
   7
   8 [ "x${SALT}" = "x" ] && die "you must set SALT to the salt."
   9 [ "x${PASS}" = "x" ] && die "you must set PASS to the password"
  10
  11 RET=0
  12 for FILE in "$@"; do
  13     if [[ "${FILE}" = *.nc ]]; then
  14         BASE_FILE="$(dirname ${FILE})/$(basename ${FILE} .nc)"
  15         if [ -e "${BASE_FILE}" ]; then
  16             echo "Not decrypting $FILE because there is already a ${BASE_FILE}"
  17         else
  18             if openssl enc -d -aes-256-ecb \
  19                     -S "$SALT" \
  20                     -k "$PASS" < "${FILE}" > "${BASE_FILE}"; then
  21                 echo "Created ${BASE_FILE}"
  22             else
  23                 echo "Failed to create ${BASE_FILE}"
  24                 RET=1
  25             fi
  26         fi
  27     else
  28         echo "Not decrypting $FILE because its name does not end in .nc"
  29     fi
  30 done
  31 exit $RET