Encrypt / Decrypt files with OpenSSL

decat.sh

#!/bin/bash

# Inspired by https://www.meixler-tech.com/web-browser-based-file-encryption-decryption.html

set -eu

openssl_enc_opts=()
file_no_ext=$(basename "$@" .enc)

[[ $# != 1 ]] && { echo "Usage: $(basename $0) FILE_NAME.enc"; exit 1; }
[[ $file_no_ext == $1 ]] && { echo "The filename must end with '.enc'"; exit 1; }
[[ -v DECAT_PASS ]] && openssl_enc_opts+=(-pass env:DECAT_PASS)

openssl enc -aes-256-cbc -pbkdf2 -in "$@" -d "${openssl_enc_opts[@]}"

decrypt.sh

#!/bin/bash

# Inspired by https://www.meixler-tech.com/web-browser-based-file-encryption-decryption.html

set -eu

out_file="$(dirname "$@")/$(basename "$@" .enc)"

[[ $# != 1 ]] && { echo "Usage: $(basename $0) FILE_NAME.enc"; exit 1; }
[[ $out_file == $1 ]] && { echo "The filename must end with '.enc'"; exit 1; }

openssl enc -aes-256-cbc -pbkdf2 -in "$@" -out "$out_file" -d

encrypt.sh

#!/bin/bash

# Inspired by https://www.meixler-tech.com/web-browser-based-file-encryption-decryption.html

set -eu

[[ $# != 1 ]] && { echo "Usage: $(basename $0) FILE_NAME"; exit 1; }

openssl enc -aes-256-cbc -pbkdf2 -in "$@" -out "$@".enc