[tests] Make rpcauth.py testable and add unit tests

refs #12995

1 files changed, 49 insertions, 0 deletions

diff --git a/test/util/rpcauth-test.py b/test/util/rpcauth-test.py
new file mode 100755
index 0000000000..dfbb5ea3a7
--- /dev/null
+++ b/test/util/rpcauth-test.py
@@ -0,0 +1,49 @@
+#!/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.
+"""Test share/rpcauth/rpcauth.py
+"""
+import base64
+import configparser
+import hmac
+import importlib
+import os
+import sys
+import unittest
+
+class TestRPCAuth(unittest.TestCase):
+    def setUp(self):
+        config = configparser.ConfigParser()
+        config_path = os.path.abspath(
+            os.path.join(os.sep, os.path.abspath(os.path.dirname(__file__)),
+            "../config.ini"))
+        with open(config_path) as config_file:
+            config.read_file(config_file)
+        sys.path.insert(0, os.path.dirname(config['environment']['RPCAUTH']))
+        self.rpcauth = importlib.import_module('rpcauth')
+
+    def test_generate_salt(self):
+        self.assertLessEqual(len(self.rpcauth.generate_salt()), 32)
+        self.assertGreaterEqual(len(self.rpcauth.generate_salt()), 16)
+
+    def test_generate_password(self):
+        salt = self.rpcauth.generate_salt()
+        password, password_hmac = self.rpcauth.generate_password(salt)
+
+        expected_password = base64.urlsafe_b64encode(
+            base64.urlsafe_b64decode(password)).decode('utf-8')
+        self.assertEqual(expected_password, password)
+
+    def test_check_password_hmac(self):
+        salt = self.rpcauth.generate_salt()
+        password, password_hmac = self.rpcauth.generate_password(salt)
+
+        m = hmac.new(bytearray(salt, 'utf-8'),
+            bytearray(password, 'utf-8'), 'SHA256')
+        expected_password_hmac = m.hexdigest()
+
+        self.assertEqual(expected_password_hmac, password_hmac)
+
+if __name__ == '__main__':
+    unittest.main()