Bash snippet - Mount and unmount cryptofs files easily.

SUBMITTED BY: DanielK

DATE: Aug. 13, 2016, 2:56 p.m.

FORMAT: Bash

SIZE: 1.7 kB

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  1. # cr_mount <cryptofs file> <mount point>
  2. # Note: You'll be asked for passphrase.
  3. #
  4. # cr_umount <mount point>
  6. function cr_mount()
  7. {
  8. local CRYPTOFS_LOOPDEV_NAME
  9. local CRYPTOFS_MAP_NAME
  11. if [ $# -gt 1 ]; then
  12. CRYPTOFS_MAP_NAME=cryptofs$( date +%s%N )
  13. CRYPTOFS_LOOPDEV_NAME=$( losetup -j $( realpath "${1}" ) | cut -d : -f 1; )
  14. if [ -z "$CRYPTOFS_LOOPDEV_NAME" ]; then
  15. CRYPTOFS_MAP_LOOP=$( losetup -f --show $( realpath "${1}" ) ) || return 1;
  16. else
  17. echo REMOVING UNNEEDED LOOP DEVICES
  18. losetup -d "${CRYPTOFS_LOOPDEV_NAME}"
  19. fi
  20. cryptsetup create "${CRYPTOFS_MAP_NAME}" "${CRYPTOFS_MAP_LOOP}" && \
  21. mount "/dev/mapper/${CRYPTOFS_MAP_NAME}" "${2}" && { echo Mounted "${1}" properly. Use cr_umount to unmount.; } || \
  22. {
  23. echo Mount failed. Bad password?; \
  24. cryptsetup remove "${CRYPTOFS_MAP_NAME}" "${CRYPTOFS_MAP_LOOP}" ; \
  25. losetup -d "${CRYPTOFS_MAP_LOOP}";
  26. }
  27. else
  28. echo "${FUNCNAME} <encrypted file path> <mount point>"
  29. fi
  30. }
  32. function cr_umount()
  33. {
  34. local CRYPTOFS_LOOPDEV_NAME
  35. local CRYPTOFS_MAP_NAME
  37. if [ $# -gt 0 ]; then
  38. CRYPTOFS_MAP_NAME=$( basename $( df "${1}" --output=source | ( read; read -r devn ; echo "${devn}" ) ) ) || return 1;
  39. CRYPTOFS_LOOPDEV_NAME=$( cryptsetup status "${CRYPTOFS_MAP_NAME}" | sed -n 's/\(.*device: \)\(.*\).*$/\2/p' ) || return 1;
  40. mount | fgrep mapper &> /dev/null && { umount "${1}" || return 1; } || echo Not mounted.
  41. if [ -n "${CRYPTOFS_MAP_NAME}" -a -n "${CRYPTOFS_LOOPDEV_NAME}" ]; then
  42. cryptsetup remove "${CRYPTOFS_MAP_NAME}"
  43. losetup -d "${CRYPTOFS_LOOPDEV_NAME}"
  44. fi
  45. else
  46. echo "${FUNCNAME} <mount point>"
  47. fi
  48. }
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