Created
October 27, 2015 12:48
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Encrypt files easy and basic with gpg
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| #!/bin/bash | |
| # Copyright © 2015 Ole Rickowski | |
| # This work is free. You can redistribute it and/or modify it under the | |
| # terms of the Do What The Fuck You Want To Public License, Version 2, | |
| # as published by Sam Hocevar. See http://www.wtfpl.net/ for more details. | |
| main(){ | |
| # Check if target file exists | |
| checkfile | |
| # Perform operation | |
| if [ $OPERATION == "e" ]; then | |
| doencrypt | |
| else | |
| dodecrypt | |
| fi | |
| } | |
| usage(){ | |
| echo "Usage: $0 <Operation> <File>" | |
| echo "Options:" | |
| echo -e "\t-e\tEncrypt file" | |
| echo -e "\t-d\tDecrypt file" | |
| echo -e "\t-f\tFile to En-/Decrypt" | |
| exit 1 | |
| } | |
| # Write in variable, which operation to be performed | |
| setoperation(){ | |
| # If already set -> usage | |
| if [ $OPERATION ]; then | |
| echo "Only one operation can be performed!" | |
| usage | |
| fi | |
| OPERATION=$1 | |
| } | |
| # Check if the file to be operated exists | |
| checkfile(){ | |
| # Check if given file exists | |
| if [ ! -f $ENCFILE ]; then | |
| prnt_red -e "\"$ENCFILE\" not found!\n" | |
| usage | |
| fi | |
| } | |
| # Encrypt the file with AES256 | |
| doencrypt(){ | |
| #Encrypt | |
| gpg -q --cipher-algo AES256 --no-use-agent -c "$ENCFILE" | |
| #Abort if error | |
| if [ ! $? -eq 0 ]; then | |
| prnt_red "Error!" | |
| exit 1 | |
| fi | |
| #Integrity check, if wanted | |
| read -p "Check integrity of encryption? [y/n]" -n 1 -r | |
| echo "" | |
| if [[ $REPLY =~ ^[YyJj]$ ]]; then | |
| #Decrypt again and check with original file | |
| gpg -q --no-use-agent -d "$ENCFILE.gpg" | cmp - "$ENCFILE" > /dev/null 2>&1 | |
| if [ ! $? -eq 0 ]; then | |
| prnt_red "Integrity failed!" | |
| else | |
| prnt_green "File seems to be alright!" | |
| fi | |
| fi | |
| #Delete the original file if wanted | |
| read -p "Do you want the non encrypted file deleted? [y/n]" -n 1 -r | |
| echo "" | |
| if [[ $REPLY =~ ^[YyJj]$ ]]; then | |
| rm $ENCFILE | |
| fi | |
| } | |
| #Decrypt the file | |
| dodecrypt(){ | |
| gpg -q --no-use-agent "$ENCFILE" | |
| #Abort if error | |
| if [ ! $? -eq 0 ]; then | |
| prnt_red "Error!" | |
| exit 1 | |
| fi | |
| #Delete encrypted file if wanted | |
| read -p "Do you want the encrypted file deleted? [y/n]" -n 1 -r | |
| echo "" | |
| if [[ $REPLY =~ ^[YyJj]$ ]]; then | |
| rm $ENCFILE | |
| fi | |
| } | |
| #Functions to print in color | |
| function prnt_green(){ | |
| echo -e "\e[1;32m$1\e[0m" | |
| } | |
| function prnt_red(){ | |
| echo -e "\e[1;31m$1\e[0m" | |
| } | |
| # ############################################### | |
| # Start | |
| # Parse Arguments | |
| # Are Arguments given? | |
| if [ $# -eq 0 ]; then | |
| usage | |
| fi | |
| while getopts ":edf:" opt; do | |
| case $opt in | |
| e) | |
| setoperation e | |
| ;; | |
| d) | |
| setoperation d | |
| ;; | |
| f) | |
| ENCFILE=$OPTARG | |
| ;; | |
| \?) | |
| echo "Wrong option: -$OPTARG" | |
| usage | |
| ;; | |
| :) | |
| echo "Missing argument for option: -$OPTARG" | |
| usage | |
| ;; | |
| esac | |
| done | |
| main |
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