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* | proto: Add ClogDigest and SlogDigest typesDavid Goulet2026-04-082-16/+51
|/ | | | | | | | | Introduce those types in order to avoid mixing them up as the previous AuthLogDigest was just a type alias over [u8; 32] Fixes #2441 Signed-off-by: David Goulet <[email protected]>
* tor-proto: replace use of `ChannelDirection` with `CircIdRange`Steven Engler2026-04-081-1/+1
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* Revert "tor-proto: change `CreateResponse` to `restricted_msg!`"Steven Engler2026-04-081-13/+2
| | | | This reverts commit 9c38daf2d3548feca2ff555f5bd52165add0d20c.
* tor-{proto,chanmgr}: change how channels accept a CREATE* handlerSteven Engler2026-04-082-28/+14
| | | | | | | | | | | Instead of giving the `CreateRequestHandler` to the channel after it's constructed, we integrate it into the handshake so that we can give it to the channel constructor. The `ChannelType` is no longer part of the `Channel`. Some of the tests could be cleaned up slightly now that the channel doesn't need the `ChannelType`, but I don't want to conflict with !3853.
* tor-proto: rename `CircIdRange::is_allowed_by_peer()` to `is_allowed_for_peer()`Steven Engler2026-04-081-2/+2
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* tor-proto: remove TODO about `UniqId` overflowSteven Engler2026-04-081-2/+2
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* tor-proto: handle incoming RELAY_EARLY messagesSteven Engler2026-04-081-2/+10
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* tor-proto: add `Channel::set_create_request_handler()`Steven Engler2026-04-081-0/+21
| | | | | | We can't pass the request handler during the `Channel` constructor since it would require conditionally compiled function arguments, which aren't nice.
* tor-proto: add `CreateRequestHandler`Steven Engler2026-04-081-0/+99
| | | | for handling CREATE* messages on channels.
* tor-proto: change `CreateResponse` to `restricted_msg!`Steven Engler2026-04-081-2/+13
| | | | | This better fits with existing code that uses `restricted_msg!` and is a bit more flexible.
* tor-proto: change channel to use `Runtime`Steven Engler2026-04-082-10/+16
| | | | | When used for relay channels, the channel reactor will soon need to spawn relay circuit reactors.
* tor-proto: support relay circs in channel's `CircMap`Steven Engler2026-04-082-11/+87
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* tor-proto: rename `CircEnt::Open` to `CircEnt::OpenOrigin`Steven Engler2026-04-082-18/+20
| | | | And rename `CircMap::add_ent()` to `add_origin_ent()`.
* tor-proto: add `CircIdRange::is_allowed_by_peer()`Steven Engler2026-03-311-0/+8
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* tor-proto: add `CircIdRange::integer_range()`Steven Engler2026-03-311-6/+15
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* proto: Improve check_relay_identities() documentationDavid Goulet2026-03-301-3/+7
| | | | Signed-off-by: David Goulet <[email protected]>
* proto: Rename many variables with more fine grained namingDavid Goulet2026-03-301-74/+86
| | | | | | | | | | Mostly, identity a `ChanTarget` as a "target" since we juggle with PeerInfo and OwnedChanTarget nowadays. All certificate and keys have very specific names which attempts to match the spec as much as possible. Signed-off-by: David Goulet <[email protected]>
* proto: Add documentation for the channel verify()David Goulet2026-03-301-1/+15
| | | | | | | | https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/3791#note_3374476 and https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/3791#note_3374478 Signed-off-by: David Goulet <[email protected]>
* proto: Remove duplicate use of read_msg() helperDavid Goulet2026-03-301-37/+37
| | | | | | | | | | Make read_msg() into a helper and use it accross the handshake code. No behavior change. https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/3791#note_3374466 Signed-off-by: David Goulet <[email protected]>
* proto: Fix a set of commentsDavid Goulet2026-03-301-4/+4
| | | | Signed-off-by: David Goulet <[email protected]>
* proto: Add AuthLogAction enum helperDavid Goulet2026-03-301-3/+22
| | | | | | | | | We can remove the "/* take_slog */ true" pattern and instead have an explicit type at the callsite for semantic. https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/3791#note_3374457 Signed-off-by: David Goulet <[email protected]>
* proto: Add a type alias for SLOG/CLOG digestDavid Goulet2026-03-302-10/+13
| | | | | | https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/3791#note_3374457 Signed-off-by: David Goulet <[email protected]>
* tor-proto: Port to web-time-compatNick Mathewson2026-03-262-6/+6
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* Fix typosTobias Stoeckmann2026-03-243-4/+4
| | | | Typos found with codespell
* proto: The relay signing key signs the auth certDavid Goulet2026-03-191-3/+3
| | | | | | In other words kp_relaysign_ed. Signed-off-by: David Goulet <[email protected]>
* tor-proto: fix the relay initiator's SLOG digestSteven Engler2026-03-191-3/+23
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* tor-proto: improve chan send/recv-log error messagesSteven Engler2026-03-191-2/+6
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* proto: Set the link protocol outside the recv VERSIONS helperDavid Goulet2026-03-191-3/+9
| | | | | | | | | | | | | | | | | | | It used to work for an initiator to set the link protocol once a VERSIONS is received because initiator send their VERSIONS before. This failed with responders because a responder channel sends their VERSIONS after receiving one from the initiator. This reverse logic means that the channel cell handler was transitionned to the Handshake state before a responder was able to send a VERSIONS cell leading to a failure because VERSIONS cell aren't allowed at the Handshake state. To fix this, the send/recv or recv/send is now explicit per channel type and once this is done and successful, the link protocol is set. A `set_link_protocol()` is added to the ChannelBaseHandshake trait so it can be used to set the cell handler. Signed-off-by: David Goulet <[email protected]>
* proto: Fix unit testsDavid Goulet2026-03-191-7/+17
| | | | Signed-off-by: David Goulet <[email protected]>
* proto: Improve logging in channel handshakeDavid Goulet2026-03-191-2/+2
| | | | Signed-off-by: David Goulet <[email protected]>
* proto: Add specialized build functions for ChannelAuthenticationDataDavid Goulet2026-03-191-8/+1
| | | | | | | | | | | The initiator and responder are quite different. Building an AUTHENTICATE cell is delicate and so this change differenticates clearly between the two. This allows us to remove the peer_cert_digest from an UnverifiedChannel which is only something that makes sense for an initiator. Signed-off-by: David Goulet <[email protected]>
* proto: New UnverifiedInitiatorChannelDavid Goulet2026-03-191-66/+109
| | | | | | | | Both client and relay specialized channel now use it as their inner base channel so they can use the same common verify() function since it is the same validation for both. Signed-off-by: David Goulet <[email protected]>
* proto: Move cert validation per specialized channelDavid Goulet2026-03-191-81/+14
| | | | | | | | | | | | | | | | | | | | | | | | Remove the last part from check_internal() that is specific to an initiator channel. At this commit, all three specialized channel do the verify process within their own verify() function. The client and relay initiator both look at the TLS cert (code duplication unfortunately). And the relay responder looks at the LINK_AUTH cert extracting the peer KP_link_ed key for validation. The CERTS cell is removed from UnverifiedChannel as it is now only useful within the verification process which is now specialized. A series of TODO(relay) is added to point out the current problem and how to fix them. The next step is to create an UnverifiedInitiatorChannel that will hold the verity_tls_cert() function and peer cert information which is only relevant to an initiator. This will remove code duplication. Signed-off-by: David Goulet <[email protected]>
* proto: Add the verify_link_auth_cert() helperDavid Goulet2026-03-191-1/+57
| | | | | | The responder channel will soon use it. Signed-off-by: David Goulet <[email protected]>
* proto: Use RelayIds in a VerifiedChannelDavid Goulet2026-03-191-59/+37
| | | | | | | | | | | | | | | | In order to pull this off, make UnverifiedChannel::check_relay_identities() to return a RelayIds that it builds after checking if they match the peer we were expecting. This part is moved in this commit so once check_relay_identities() returns, we are certain of the relay identity validity on both "it identified properly" and "it is the right expected relay". This makes it that the check_relay_identities() returns the RelayIds, the signing key and the RSA id digest (which is needed for authentication later). Signed-off-by: David Goulet <[email protected]>
* proto: Move into a helper function the TLS cert validationDavid Goulet2026-03-191-28/+61
| | | | | | | | | | This introduces verify_tls_cert() standalone function. It is such because both client and relay initiator will use it. For now, the check_internal() has been modified to use it. We are slowly building towards having specialized check function per channel type. Signed-off-by: David Goulet <[email protected]>
* proto: Split relay identity checks from CERTS into its own functionDavid Goulet2026-03-191-90/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a loaded commit, apologize in advance but not many way around this. One thing that is generic to all verifiable channel (authenticated) is that they all need to check the relay identities and signing key from the CERTS cell. This commits extracts that part into UnverifiedChannel::check_relay_identities() which returns those said identities and the signing key (KP_relaysign_ed). The signing key is actually needed for only one context, the initiator part because the TLS cert is signed with it. The LINK AUTH cert is signed by the ed25519 identity key itself which is what the responder will look for. This commit has two side effects which I believe are OK: 1. The timeliness check of the identity certs is now done prior to the other cert (TLS/LINK). 2. We no longer check signatures in batch mode as we can't batch ed25519 sig check with the RSA crosscert sig. It appears the batch validation was there for performance and not for security purposes. The end goal of this piece of work is that the specialized channel will start by calling a generic check function that will call check_relay_identities(). And then, the secondary certificates will get checked depending on the side of the channel. Expect also a variable rename commit at the end as the naming in this function is really bad. Signed-off-by: David Goulet <[email protected]>
* proto: Extract inline helpers into struct itselfDavid Goulet2026-03-191-40/+46
| | | | | | | | | | | Move two inline functions located in UnverifiedChannel::check_internal() into the UnverifiedChannel object itself. Laying down the ground work for the more specialized objects to use those as the check_internal() is about to get massively refactored into more specific channel types. Signed-off-by: David Goulet <[email protected]>
* tor-cell: rename `RestrictedMsg::restricted_cmds()` to `cmds_for_logging()`Steven Engler2026-03-041-1/+1
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* tor-proto: small code cleanupSteven Engler2026-03-031-9/+3
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* tor-proto: improve error messages using `RestrictedMsg`Steven Engler2026-03-031-16/+10
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* tor-proto: improve error messages during handshakeSteven Engler2026-03-031-4/+5
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* tor-proto: during handshake ensure circ id is 0Steven Engler2026-03-031-2/+9
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* tor-proto: require cells from responder to be orderedSteven Engler2026-03-031-60/+97
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* tor-proto: make receiving AUTH_CHALLENGE non-optionalSteven Engler2026-03-031-4/+3
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* tor-proto: remove `is_expecting_auth_challenge()`Steven Engler2026-03-031-6/+1
| | | | The responder always sends an AUTH_CHALLENGE cell.
* tor-proto: send an AUTH_CHALLENGE during testsSteven Engler2026-03-031-0/+2
| | | | | | | As far as I know, a responder will always send an AUTH_CHALLENGE cell since it doesn't yet know if the initiator is a client or relay. The spec also doesn't have any mention about the AUTH_CHALLENGE being optional. So we should send it in our tests as well.
* safelog: Rename MaybeSensitive::hidden/visible()David Goulet2026-03-032-4/+7
| | | | | | Rename them to respectively sensitive() and not_sensitive(). Signed-off-by: David Goulet <[email protected]>
* linkspec: Implement a RelayIdsBuilder::from_relay_ids()David Goulet2026-03-031-6/+2
| | | | | | | | | This is used when we build an OwnedChanTarget using the builder. Instead of going identities by identities at the callsite, we can use this helper to get us a RelayIds builder and set it in the OwnedChanTargetBuilder. Signed-off-by: David Goulet <[email protected]>
* proto: Channel handshake minor cleanupDavid Goulet2026-03-031-5/+6
| | | | | | | | | | To make the code a bit better here. Also, at this commit, the UnverifiedChannel::finish() and VerifiedChannel::finish() are basically the exact same. A refactoring to use a finish() helper would work nicely. Signed-off-by: David Goulet <[email protected]>
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