""" Copyright 2014-2020 Vincent Texier <vit@free.fr> DuniterPy is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. DuniterPy is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. """ import getpass import libnacl.sign from duniterpy.key import SigningKey # CONFIG ####################################### SIGNED_MESSAGE_FILENAME = "/tmp/duniter_signed_message.bin" ################################################ if __name__ == "__main__": # prompt hidden user entry salt = getpass.getpass("Enter your passphrase (salt): ") # prompt hidden user entry password = getpass.getpass("Enter your password: ") # Create key object key = SigningKey.from_credentials(salt, password) # Display your public key print("Public key for your credentials: %s" % key.pubkey) message = input("Enter your message: ") # Sign the message, the signed string is the message itself plus the # signature signed_message = key.sign(bytes(message, "utf-8")) # type: bytes # To create a verifier pass in the verify key: veri = libnacl.sign.Verifier(key.hex_vk()) # Verify the message! verified = veri.verify(signed_message) # save signed message in a file with open(SIGNED_MESSAGE_FILENAME, "wb") as file_handler: file_handler.write(signed_message) print("Signed message saved in file ./{0}".format(SIGNED_MESSAGE_FILENAME))