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-rwxr-xr-xshare/rpcauth/rpcauth.py46
1 files changed, 28 insertions, 18 deletions
diff --git a/share/rpcauth/rpcauth.py b/share/rpcauth/rpcauth.py
index f9b9787514..da84deb5e2 100755
--- a/share/rpcauth/rpcauth.py
+++ b/share/rpcauth/rpcauth.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python3
# Copyright (c) 2015-2017 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
+# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
import sys
@@ -9,26 +9,36 @@ from random import SystemRandom
import base64
import hmac
-if len(sys.argv) < 2:
- sys.stderr.write('Please include username as an argument.\n')
- sys.exit(0)
+def generate_salt():
+ # This uses os.urandom() underneath
+ cryptogen = SystemRandom()
-username = sys.argv[1]
+ # Create 16 byte hex salt
+ salt_sequence = [cryptogen.randrange(256) for _ in range(16)]
+ return ''.join([format(r, 'x') for r in salt_sequence])
-#This uses os.urandom() underneath
-cryptogen = SystemRandom()
+def generate_password(salt):
+ """Create 32 byte b64 password"""
+ password = base64.urlsafe_b64encode(os.urandom(32)).decode('utf-8')
-#Create 16 byte hex salt
-salt_sequence = [cryptogen.randrange(256) for i in range(16)]
-hexseq = list(map(hex, salt_sequence))
-salt = "".join([x[2:] for x in hexseq])
+ m = hmac.new(bytearray(salt, 'utf-8'), bytearray(password, 'utf-8'), 'SHA256')
+ password_hmac = m.hexdigest()
-#Create 32 byte b64 password
-password = base64.urlsafe_b64encode(os.urandom(32)).decode("utf-8")
+ return password, password_hmac
-m = hmac.new(bytearray(salt, 'utf-8'), bytearray(password, 'utf-8'), "SHA256")
-result = m.hexdigest()
+def main():
+ if len(sys.argv) < 2:
+ sys.stderr.write('Please include username as an argument.\n')
+ sys.exit(0)
-print("String to be appended to bitcoin.conf:")
-print("rpcauth="+username+":"+salt+"$"+result)
-print("Your password:\n"+password)
+ username = sys.argv[1]
+
+ salt = generate_salt()
+ password, password_hmac = generate_password(salt)
+
+ print('String to be appended to bitcoin.conf:')
+ print('rpcauth={0}:{1}${2}'.format(username, salt, password_hmac))
+ print('Your password:\n{0}'.format(password))
+
+if __name__ == '__main__':
+ main()