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#!/usr/bin/env python3
#
# Copyright (C) 2013-2015 The python-bitcoinlib developers
#
# This file is part of python-bitcoinlib.
#
# It is subject to the license terms in the LICENSE file found in the top-level
# directory of this distribution.
#
# No part of python-bitcoinlib, including this file, may be copied, modified,
# propagated, or distributed except according to the terms contained in the
# LICENSE file.
from __future__ import absolute_import, division, print_function, unicode_literals
from bitcoin.wallet import CBitcoinSecret, P2PKHBitcoinAddress
from bitcoin.signmessage import BitcoinMessage, VerifyMessage, SignMessage
def sign_message(key, msg):
secret = CBitcoinSecret(key)
message = BitcoinMessage(msg)
return SignMessage(secret, message)
def print_default(signature, key=None, msg=None):
print(signature.decode('ascii'))
def print_verbose(signature, key, msg):
secret = CBitcoinSecret(key)
address = P2PKHBitcoinAddress.from_pubkey(secret.pub)
message = BitcoinMessage(msg)
print('Address: %s' % address)
print('Message: %s' % msg)
print('Signature: %s' % signature)
print('Verified: %s' % VerifyMessage(address, message, signature))
print('\nTo verify using bitcoin core:')
print('\n`bitcoin-cli verifymessage %s \'%s\' \'%s\'`\n' % (address, signature.decode('ascii'), msg))
def parser():
import argparse
parser = argparse.ArgumentParser(
description='Sign a message with a private key.',
epilog='Security warning: arguments may be visible to other users on the same host.')
parser.add_argument(
'-v', '--verbose', dest='print_result',
action='store_const', const=print_verbose, default=print_default,
help='verbose output')
parser.add_argument(
'-k', '--key',
required=True,
help='private key in base58 encoding')
parser.add_argument(
'-m', '--msg',
required=True,
help='message to sign')
return parser
if __name__ == '__main__':
args = parser().parse_args()
try:
signature = sign_message(args.key, args.msg)
except Exception as error:
print('%s: %s' % (error.__class__.__name__, str(error)))
exit(1)
else:
args.print_result(signature, args.key, args.msg)
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