Merge bitcoin/bitcoin#26829: init: Remove unnecessary sensitive flag from rpcbind

b9d5674 init: Remove sensitive flag from rpcbind (Andrew Chow)

Pull request description:

  `-rpcbind` is currently flagged as a sensitive option which means that its value will be masked when the command line args are written to the debug.log file. However this is not useful as if `rpcbind` is actually activated, the bound IP addresses will be written to the log anyways. The test `feature_config_args.py` did not catch this contradiction as the test node was not started with `rpcallowip` and so `rpcbind` was not acted upon.

  This also brings `rpcbind` inline with `bind` as that is not flagged as sensitive either.

ACKs for top commit:
  Sjors:
    re-utACK b9d5674
  willcl-ark:
    ACK b9d5674
  theStack:
    ACK b9d5674

Tree-SHA512: 50ab5ad2e18ae70649deb1ac429d404b5f5c41f32a4943b2041480580152df22e72d4aae493379d0b23fcb649ab342376a82119760fbf6dfdcda659ffd3e244a

Author: MarcoFalke

src/init.cpp

@@ -603,7 +603,7 @@ void SetupServerArgs(ArgsManager& argsman)
     argsman.AddArg("-rest", strprintf("Accept public REST requests (default: %u)", DEFAULT_REST_ENABLE), ArgsManager::ALLOW_ANY, OptionsCategory::RPC);
     argsman.AddArg("-rpcallowip=<ip>", "Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This option can be specified multiple times", ArgsManager::ALLOW_ANY, OptionsCategory::RPC);
     argsman.AddArg("-rpcauth=<userpw>", "Username and HMAC-SHA-256 hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcauth. The client then connects normally using the rpcuser=<USERNAME>/rpcpassword=<PASSWORD> pair of arguments. This option can be specified multiple times", ArgsManager::ALLOW_ANY | ArgsManager::SENSITIVE, OptionsCategory::RPC);
-    argsman.AddArg("-rpcbind=<addr>[:port]", "Bind to given address to listen for JSON-RPC connections. Do not expose the RPC server to untrusted networks such as the public internet! This option is ignored unless -rpcallowip is also passed. Port is optional and overrides -rpcport. Use [host]:port notation for IPv6. This option can be specified multiple times (default: 127.0.0.1 and ::1 i.e., localhost)", ArgsManager::ALLOW_ANY | ArgsManager::NETWORK_ONLY | ArgsManager::SENSITIVE, OptionsCategory::RPC);
+    argsman.AddArg("-rpcbind=<addr>[:port]", "Bind to given address to listen for JSON-RPC connections. Do not expose the RPC server to untrusted networks such as the public internet! This option is ignored unless -rpcallowip is also passed. Port is optional and overrides -rpcport. Use [host]:port notation for IPv6. This option can be specified multiple times (default: 127.0.0.1 and ::1 i.e., localhost)", ArgsManager::ALLOW_ANY | ArgsManager::NETWORK_ONLY, OptionsCategory::RPC);
     argsman.AddArg("-rpcdoccheck", strprintf("Throw a non-fatal error at runtime if the documentation for an RPC is incorrect (default: %u)", DEFAULT_RPC_DOC_CHECK), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::RPC);
     argsman.AddArg("-rpccookiefile=<loc>", "Location of the auth cookie. Relative paths will be prefixed by a net-specific datadir location. (default: data dir)", ArgsManager::ALLOW_ANY, OptionsCategory::RPC);
     argsman.AddArg("-rpcpassword=<pw>", "Password for JSON-RPC connections", ArgsManager::ALLOW_ANY | ArgsManager::SENSITIVE, OptionsCategory::RPC);

test/functional/feature_config_args.py

@@ -126,7 +126,6 @@ def test_args_log(self):
                 expected_msgs=[
                     'Command-line arg: addnode="some.node"',
                     'Command-line arg: rpcauth=****',
-                    'Command-line arg: rpcbind=****',
                     'Command-line arg: rpcpassword=****',
                     'Command-line arg: rpcuser=****',
                     'Command-line arg: torpassword=****',
@@ -135,14 +134,17 @@ def test_args_log(self):
                 ],
                 unexpected_msgs=[
                     'alice:f7efda5c189b999524f151318c0c86$d5b51b3beffbc0',
-                    '127.1.1.1',
                     'secret-rpcuser',
                     'secret-torpassword',
+                    'Command-line arg: rpcbind=****',
+                    'Command-line arg: rpcallowip=****',
                 ]):
             self.start_node(0, extra_args=[
                 '-addnode=some.node',
                 '-rpcauth=alice:f7efda5c189b999524f151318c0c86$d5b51b3beffbc0',
                 '-rpcbind=127.1.1.1',
+                '-rpcbind=127.0.0.1',
+                "-rpcallowip=127.0.0.1",
                 '-rpcpassword=',
                 '-rpcuser=secret-rpcuser',
                 '-torpassword=secret-torpassword',