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#!/usr/bin/env python3
# Copyright (c) 2015-2018 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
import sys
import os
import base64
from binascii import hexlify
import hmac
def generate_salt(size):
"""Create size byte hex salt"""
return hexlify(os.urandom(size)).decode()
def generate_password():
"""Create 32 byte b64 password"""
return base64.urlsafe_b64encode(os.urandom(32)).decode('utf-8')
def password_to_hmac(salt, password):
m = hmac.new(bytearray(salt, 'utf-8'), bytearray(password, 'utf-8'), 'SHA256')
return m.hexdigest()
def main():
if len(sys.argv) < 2:
sys.stderr.write('Please include username (and an optional password, will generate one if not provided) as an argument.\n')
sys.exit(0)
username = sys.argv[1]
# Create 16 byte hex salt
salt = generate_salt(16)
if len(sys.argv) > 2:
password = sys.argv[2]
else:
password = generate_password()
password_hmac = password_to_hmac(salt, password)
print('String to be appended to bitcoin.conf:')
print('rpcauth={0}:{1}${2}'.format(username, salt, password_hmac))
print('Your password:\n{0}'.format(password))
if __name__ == '__main__':
main()
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