bitcoin#14494: Error if # is used in rpcpassword in conf

0385109 Add test for rpcpassword hash error (MeshCollider)
13fe258 Error if rpcpassword in conf contains a hash character (MeshCollider)

Pull request description:

  Fixes bitcoin#13143 now bitcoin#13482 was merged

Tree-SHA512: e7d00c8df1657f6b8d0eee1e06b9ce2b1b0a2de487377699382c1b057836e1571dac313ca878b5877c862f0461ba789a50b239d2a9f34accd8a6321f126e3d2a

src/util/system.cpp

@@ -885,8 +885,10 @@ static bool GetConfigOptions(std::istream& stream, std::string& error, std::vect
     std::string::size_type pos;
     int linenr = 1;
     while (std::getline(stream, str)) {
+        bool used_hash = false;
         if ((pos = str.find('#')) != std::string::npos) {
             str = str.substr(0, pos);
+            used_hash = true;
         }
         const static std::string pattern = " \t\r\n";
         str = TrimString(str, pattern);
@@ -899,6 +901,10 @@ static bool GetConfigOptions(std::istream& stream, std::string& error, std::vect
             } else if ((pos = str.find('=')) != std::string::npos) {
                 std::string name = prefix + TrimString(str.substr(0, pos), pattern);
                 std::string value = TrimString(str.substr(pos + 1), pattern);
+                if (used_hash && name == "rpcpassword") {
+                    error = strprintf("parse error on line %i, using # in rpcpassword can be ambiguous and should be avoided", linenr);
+                    return false;
+                }
                 options.emplace_back(name, value);
             } else {
                 error = strprintf("parse error on line %i: %s", linenr, str);

test/functional/feature_config_args.py

@@ -39,6 +39,15 @@ def test_config_file_parser(self):
             conf.write('nono\n')
         self.nodes[0].assert_start_raises_init_error(expected_msg='Error reading configuration file: parse error on line 1: nono, if you intended to specify a negated option, use nono=1 instead')
 
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('server=1\nrpcuser=someuser\nrpcpassword=some#pass')
+        self.nodes[0].assert_start_raises_init_error(expected_msg='Error reading configuration file: parse error on line 3, using # in rpcpassword can be ambiguous and should be avoided')
+
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('testnot.datadir=1\n[testnet]\n')
+        self.restart_node(0)
+        self.nodes[0].stop_node(expected_stderr='Warning: Section [testnet] is not recognized.' + os.linesep + 'Warning: Section [testnot] is not recognized.')
+
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('')  # clear