Encrypt a file to send it securely to another Hubber

enc4hub.sh

#!/usr/bin/env bash
# Encrypt a file to send it securely to another Hubber
#
# Use https://gpgtools.org/ to an easy to use decryption UI.
#
 # Usage:
#   enc4hub larsxschneider /path/to/file
#
set -e
recipient=$1
file=$2

# Import the public key of the recipient from GitHub
gpg --import <(curl --silent https://github.com/$recipient.gpg)

# Encrypt the file with the recipient's key and sign it with my own key
gpg --encrypt --sign --armor --trust-model always --recipient $recipient@github.com "$file"