Added rpcauth.py to bitcoin

roles/apps/files/bitcoin/rpcauth.py

@@ -0,0 +1,54 @@
+#! /usr/bin/env python3
+# vim:fenc=utf-8
+#
+# Copyright © 2024 barry <barry@e14>
+#
+# Distributed under terms of the MIT license.
+
+"""
+bitcoin tool to generate rpcauth
+"""
+
+#!/usr/bin/env python3
+# Copyright (c) 2015-2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+from argparse import ArgumentParser
+from getpass import getpass
+from secrets import token_hex, token_urlsafe
+import hmac
+
+def generate_salt(size):
+    """Create size byte hex salt"""
+    return token_hex(size)
+
+def generate_password():
+    """Create 32 byte b64 password"""
+    return token_urlsafe(32)
+
+def password_to_hmac(salt, password):
+    m = hmac.new(salt.encode('utf-8'), password.encode('utf-8'), 'SHA256')
+    return m.hexdigest()
+
+def main():
+    parser = ArgumentParser(description='Create login credentials for a JSON-RPC user')
+    parser.add_argument('username', help='the username for authentication')
+    parser.add_argument('password', help='leave empty to generate a random password or specify "-" to prompt for password', nargs='?')
+    args = parser.parse_args()
+
+    if not args.password:
+        args.password = generate_password()
+    elif args.password == '-':
+        args.password = getpass()
+
+    # Create 16 byte hex salt
+    salt = generate_salt(16)
+    password_hmac = password_to_hmac(salt, args.password)
+
+    print('String to be appended to bitcoin.conf:')
+    print(f'rpcauth={args.username}:{salt}${password_hmac}')
+    print(f'Your password:\n{args.password}')
+
+if __name__ == '__main__':
+    main()