share/rpcuser/rpcuser.py

   1 #!/usr/bin/env python2
   2 # Copyright (c) 2015-2016 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 import hashlib
   7 import sys
   8 import os
   9 from random import SystemRandom
  10 import base64
  11 import hmac
  12
  13 if len(sys.argv) < 2:
  14     sys.stderr.write('Please include username as an argument.\n')
  15     sys.exit(0)
  16
  17 username = sys.argv[1]
  18
  19 #This uses os.urandom() underneath
  20 cryptogen = SystemRandom()
  21
  22 #Create 16 byte hex salt
  23 salt_sequence = [cryptogen.randrange(256) for i in range(16)]
  24 hexseq = list(map(hex, salt_sequence))
  25 salt = "".join([x[2:] for x in hexseq])
  26
  27 #Create 32 byte b64 password
  28 password = base64.urlsafe_b64encode(os.urandom(32))
  29
  30 digestmod = hashlib.sha256
  31
  32 if sys.version_info.major >= 3:
  33     password = password.decode('utf-8')
  34     digestmod = 'SHA256'
  35
  36 m = hmac.new(bytearray(salt, 'utf-8'), bytearray(password, 'utf-8'), digestmod)
  37 result = m.hexdigest()
  38
  39 print("String to be appended to bitcoin.conf:")
  40 print("rpcauth="+username+":"+salt+"$"+result)
  41 print("Your password:\n"+password)