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# Copyright 2014-2022 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"
################################################
def save_binary_signed_message():
# 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(f"Public key for your credentials: {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)
print(f"Message verified: {verified}")
# save signed message in a file
with open(SIGNED_MESSAGE_FILENAME, "wb") as file_handler:
file_handler.write(signed_message)
print(f"Signed message saved in file {SIGNED_MESSAGE_FILENAME}")
if __name__ == "__main__":
save_binary_signed_message()
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