This commit refactors the handle_hs_exit_conn() function introduced at a prior
commit that connects the rendezvous circuit to the edge connection used to
connect to the service virtual port requested in a BEGIN cell.
The refactor adds the support for prop224 adding the
hs_service_set_conn_addr_port() function that has the same purpose has
rend_service_set_connection_addr_port() from the legacy code.
The rend_service_set_connection_addr_port() has also been a bit refactored so
the common code can be shared between the two HS subsystems (legacy and
prop224).
In terms of functionallity, nothing has changed, we still close the circuits
in case of failure for the same reasons as the legacy system currently does.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit simply moves the code from the if condition of a rendezvous
circuit to a function to handle such a connection. No code was modified
_except_ the use or rh.stream_id changed to n_stream->stream_id so we don't
have to pass the cell header to the function.
This is groundwork for prop224 support which will break down the
handle_hs_exit_conn() depending on the version of hidden service the circuit
and edge connection is for.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Introduction point are rotated either if we get X amounts of INTRODUCE2 cells
on it or a time based expiration. This commit adds two consensus parameters
which are the min and max value bounding the random value X.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Imagine a Tor network where you have only 8 nodes available due to some
reasons. And your hidden service wants 8 introduction points. Everything is
fine but then a node goes down bringing the network to 7. The service will
retry 3 times that node and then give up but keep it in a failure cache for 5
minutes (INTRO_CIRC_RETRY_PERIOD) so it doesn't retry it non stop and exhaust
the maximum number of circuit retry.
In the real public network today, this is unlikely to happen unless the
ExcludeNodes list is extremely restrictive.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit adds a directory command function to make an upload directory
request for a service descriptor.
It is not used yet, just the groundwork.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This hsdir index value is used to give an index value to all node_t (relays)
that supports HSDir v3. An index value is then computed using the blinded key
to know where to fetch/upload the service descriptor from/to.
To avoid computing that index value everytime the client/service needs it, we
do that everytime we get a new consensus which then doesn't change until the
next one. The downside is that we need to sort them once we need to compute
the set of responsible HSDir.
Finally, the "hs_index" function is also added but not used. It will be used
in later commits to compute which node_t is a responsible HSDir for the
service we want to fetch/upload the descriptor.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add this helper function that can lookup and return all the needed object from
a circuit identifier. It is a pattern we do often so make it nicer and avoid
duplicating it everywhere.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add the entry point from the circuit subsystem of "circuit has opened" which
is for all type of hidden service circuits. For the introduction point, this
commit actually adds the support for handling those circuits when opened and
sending ESTABLISH_INTRO on a circuit.
Rendevzou point circuit aren't supported yet at this commit.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit adds the functionality for a service to build its descriptor.
Also, a global call to build all descriptors for all services is added to the
service scheduled events.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add the main loop entry point to the HS service subsystem. It is run every
second and make sure that all services are in their quiescent state after that
which means valid descriptors, all needed circuits opened and latest
descriptors have been uploaded.
For now, only v2 is supported and placeholders for v3 actions for that main
loop callback.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a function for both the client and service side that is building a blinded
key from a keypair (service) and from a public key (client). Those two
functions uses the current time period information to build the key.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a new and free function for hs_desc_intro_point_t so the service can use
them to setup those objects properly.
Signed-off-by: David Goulet <dgoulet@torproject.org>
A prop224 descriptor was missing the onion key for an introduction point which
is needed to extend to it by the client.
Closes#22979
Signed-off-by: David Goulet <dgoulet@torproject.org>
Remove the legacy intro point key because both service and client only uses
the ed25519 key even though the intro point chosen is a legacy one.
This also adds the CLIENT_PK key that is needed for the ntor handshake.
Signed-off-by: David Goulet <dgoulet@torproject.org>
We need to keep these around for TAP and old-style hidden services,
but they're obsolete, and we shouldn't encourage anyone to use them.
So I've added "obsolete" to their names, and a comment explaining
what the problem is.
Closes ticket 23026.
Closes bug 22964. Based on Teor's replacement there, but tries
to put the comment in a more logical place, and explain why we're
actually disabling compression in the first place.
There isn't much of a point of this buggy test afterall to add twice the same
service object but with a different key which ultinately can end up failing
the test because 1/N_BUCKETS of probability that we end up to put the service
in the same bucket.
Fixes#23023
Signed-off-by: David Goulet <dgoulet@torproject.org>
Fix for 22924. Bugfix on 0.2.9.1-alpha when the test was introducd
-- though it couldn't actually overflow until we fixed 17750.
Additionally, this only seems to overflow on 32-bit, and only when
the compiler doesn't re-order the (possibly dead) assignment out of
the way. We ran into it on a 32-bit ubuntu trusty builder.
