Easy-to-use encryption on linux-based systems (GPG)

easyenc.sh

#!/bin/bash

# Source this file to have the functions in your shell, or add following line to your ~/.bashrc :
#   source easyenc.sh
# Make sure to specify the correct path.
# Now you can: source ~/.bashrc

# $1: input file
# $2: output file (encrypted)
function encryptfile() {
  gpg --cipher-algo AES256 --output $2 --symmetric $1
}

# $1: input file (encrypted)
# $2: output file (decrypted)
function decryptfile() {
  gpg --output $2 --decrypt $1
}

# Encrypt all files in a folder
# First, cd into it
# $1: specify 'deluncrypt' for deleting all unencrypted files after encryption
# $2: specify 'abortonerror' to cancel the operation when an error happens
function encryptfolder() {
  echo -n "Type in your password: "
  read -s ppsswd
  echo
  echo -n "Repeat your password: "
  read -s ppsswdr
  echo
  if ! [ "$ppsswd" == "$ppsswdr" ]; then
    echo "Passwords don't match!"
    unset ppsswdr
    unset ppsswd
    return 1
  fi
  local passw=`echo -n $ppsswd | sha256sum | cut -d ' ' -f1`
  unset ppsswd
  unset ppsswdr
  echo -e "\n"
  while read ffdd; do
    echo -e "\e[1mEncrypting $ffdd\e[0m"
    echo "$passw" | gpg --passphrase-fd 0 --batch --yes --quiet --cipher-algo AES256 --output "$ffdd.gpg.crypt" --symmetric "$ffdd"
    if [ $? -ne 0 ]; then
      echo -e "Failed to encrypt $ffdd"
      if [[ " $@ " == *" abortonerror "* ]]; then return 1; fi
    elif [ "$1" == "deluncrypt" ];
      then rm $ffdd
    fi
  done < <(find . -type f)
}

# Decrypt all files in a folder which have been encrypted using encryptfolder()
# First, cd into it
# $1: specify 'delcrypt' to delete encrypted files after decryption
# $2: specify 'abortonerror' to cancel the operation on error
function decryptfolder() {
  echo -n "Enter your password: "
  read -s ppsswd
  echo -e "\n"
  local passw=`echo -n $ppsswd | sha256sum | cut -d ' ' -f1`
  unset ppsswd
  while read ffdd; do
    echo -e "\e[1mDecrypting $ffdd\e[0m"
    echo "$passw" | gpg --passphrase-fd 0 --batch --yes --quiet --output "${ffdd/[.]gpg[.]crypt/}" --decrypt "$ffdd"
    if [ $? -ne 0 ]; then
      echo -e "Failed to decrypt $ffdd. Is your password correct?"
      if [[ " $@ " == *" abortonerror "* ]]; then return 1; fi
    elif [ "$1" == "delcrypt" ]; then
      rm $ffdd
    fi
  done < <(find . -name "*.gpg.crypt" -type f)
}

# Delete all not encrypted files
function deluncryptfiles() {
  while read file; do
    if [[ "$file" != *".gpg.crypt" ]]; then
      echo "Deleting not encrypted file $file"
      rm -rf $file
    fi
  done < <(find . -type f)
}

# Delete all encrypted files
function delcryptfiles() {
  while read file; do
    echo "Deleting encrypted file $file"
    rm -rf $file
  done < <(find . -name "*.gpg.crypt" -type f)
}

your.bashrc

# ...

source ~/easyenc.sh