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tor: enable PoW defenses for automatically created hidden services

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Enable PoW defenses [1] for hidden services that we create via
Tor Control using the `ADD_ONION` command [2].

The ability to do that has been added in tor-0.4.9.2-alpha [3]. Previous
versions return a syntax error to the `ADD_ONION` command with
`PoWDefensesEnabled=1`, so the approach here is to try with PoW and if
we get syntax error, then retry without PoW.

[1] https://tpo.pages.torproject.net/onion-services/ecosystem/technology/security/pow/
[2] https://spec.torproject.org/control-spec/commands.html#add_onion
[3] 02c1804446
This commit is contained in:
Vasil Dimov
2025-09-15 15:44:03 +02:00
parent fb993f7604
commit 4c6798a3d3
3 changed files with 31 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/test/fuzz/torcontrol.cpp
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@@ -54,6 +54,9 @@ FUZZ_TARGET(torcontrol, .init = initialize_torcontrol)
[&] {
tor_control_reply.code = TOR_REPLY_UNRECOGNIZED;
},
[&] {
tor_control_reply.code = TOR_REPLY_SYNTAX_ERROR;
},
[&] {
tor_control_reply.code = fuzzed_data_provider.ConsumeIntegral<int>();
});
@@ -65,7 +68,10 @@ FUZZ_TARGET(torcontrol, .init = initialize_torcontrol)
CallOneOf(
fuzzed_data_provider,
[&] {
tor_controller.add_onion_cb(dummy_tor_control_connection, tor_control_reply);
tor_controller.add_onion_cb(dummy_tor_control_connection, tor_control_reply, /*pow_was_enabled=*/true);
},
[&] {
tor_controller.add_onion_cb(dummy_tor_control_connection, tor_control_reply, /*pow_was_enabled=*/false);
},
[&] {
tor_controller.auth_cb(dummy_tor_control_connection, tor_control_reply);