An earlier version of these tests was broken; now they're a nicer,
more robust, more black-box set of tests. The key is to have each
test check a handshake message that is wrong in _one_ way.
This includes the link handshake variations for proposal220.
We'll use this for testing first, and then use it to extend our
current code to support prop220.
When there are annotations on a router descriptor, the
ed25519-identity element won't be at position 0 or 1; it will be at
router+1 or router-1.
This patch also adds a missing smartlist function to search a list for
an item with a particular pointer.
With this patch:
* Authorities load the key-pinning log at startup.
* Authorities open a key-pinning log for writing at startup.
* Authorities reject any router with an ed25519 key where they have
previously seen that ed25519 key with a different RSA key, or vice
versa.
* Authorities warn about, but *do not* reject, RSA-only descriptors
when the RSA key has previously gone along with an Ed25519 key.
(We should make this a 'reject' too, but we can't do that until we're
sure there's no legit reason to downgrade to 0.2.5.)
This module implements a key-pinning mechanism to ensure that it's
safe to use RSA keys as identitifers even as we migrate to Ed25519
keys. It remembers, for every Ed25519 key we've seen, what the
associated Ed25519 key is. This way, if we see a different Ed25519
key with that RSA key, we'll know that there's a mismatch.
We persist these entries to disk using a simple format, where each
line has a base64-encoded RSA SHA1 hash, then a base64-endoded
Ed25519 key. Empty lines, misformed lines, and lines beginning with
a # are ignored. Lines beginning with @ are reserved for future
extensions.
Routers now use TAP and ntor onion keys to sign their identity keys,
and put these signatures in their descriptors. That allows other
parties to be confident that the onion keys are indeed controlled by
the router that generated the descriptor.
Routers now use TAP and ntor onion keys to sign their identity keys,
and put these signatures in their descriptors. That allows other
parties to be confident that the onion keys are indeed controlled by
the router that generated the descriptor.
For prop220, we have a new ed25519 certificate type. This patch
implements the code to create, parse, and validate those, along with
code for routers to maintain their own sets of certificates and
keys. (Some parts of master identity key encryption are done, but
the implementation of that isn't finished)
If the OpenSSL team accepts my patch to add an
SSL_get_client_ciphers function, this patch will make Tor use it
when available, thereby working better with openssl 1.1.
We previously used this function instead of SSL_set_cipher_list() to
set up a stack of client SSL_CIPHERs for these reasons:
A) In order to force a particular order of the results.
B) In order to be able to include dummy entries for ciphers that
this build of openssl did not support, so we could impersonate
Firefox harder.
But we no longer do B, since we merged proposal 198 and stopped
lying about what ciphers we know.
And A was actually pointless, since I had misread the implementation
of SSL_set_cipher_list(). It _does_ do some internal sorting, but
that is pre-sorting on the master list of ciphers, not sorting on
the user's preferred order.
As OpenSSL >= 1.0.0 is now required, ECDHE is now mandatory. The group
has to be validated at runtime, because of RedHat lawyers (P224 support
is entirely missing in the OpenSSL RPM, but P256 is present and is the
default).
Resolves ticket #16140.
The key here is to never touch ssl->cipher_list directly, but only
via SSL_get_ciphers(). But it's not so simple.
See, if there is no specialized cipher_list on the SSL object,
SSL_get_ciphers returns the cipher_list on the SSL_CTX. But we sure
don't want to modify that one! So we need to use
SSL_set_cipher_list first to make sure that we really have a cipher
list on the SSL object.
When set, this limits the maximum number of simultaneous streams per
rendezvous circuit on the server side of a HS, with further RELAY_BEGIN
cells being silently ignored.
This can be modified via "HiddenServiceMaxStreamsCloseCircuit", which
if set will cause offending rendezvous circuits to be torn down instead.
Addresses part of #16052.
Ephemeral services will be listed in rend_services_list at the end of
rend_config_services, so it must check whether directory is non-NULL
before comparing.
This crash happens when reloading config on a tor with mixed configured
and ephemeral services.
Fixes bug #16060. Bugfix on 0.2.7.1-alpha.
With #15881 implemented, this adds the missing descriptor ID at the end of
the expected control message.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
For FAILED and RECEIVED action of the HS_DESC event, we now sends back the
descriptor ID at the end like specified in the control-spec section 4.1.25.
Fixes#15881
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
This field was only needed to work with the now-long-gone (I hope,
except for some horrible apples) openssl 0.9.8l; if your headers say
you have openssl 1.1, you won't even need it.
OpenSSL 1.1.0 must be built with "enable-deprecated", and compiled with
`OPENSSL_USE_DEPRECATED` for this to work, so instead, use the newer
routine as appropriate.
The length of auth_data from an INTRODUCE2 cell is checked when the
auth_type is recognized (1 or 2), but not for any other non-zero
auth_type. Later, auth_data is assumed to have at least
REND_DESC_COOKIE_LEN bytes, leading to a client-triggered out of bounds
read.
Fixed by checking auth_len before comparing the descriptor cookie
against known clients.
Fixes#15823; bugfix on 0.2.1.6-alpha.
"+HSPOST" and the related event changes allow the uploading of HS
descriptors via the control port, and more comprehensive event
monitoring of HS descriptor upload status.
When we have a new descriptor ID for an onion address request, change it in
the rend_data_t object and purge the old one from the last hid serv request
cache.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Stop using an onion address since it's not indexed with that anymore in the
last hid serv request cache. Instead use a base32 encoded descriptor ID
contained in the rend_data_t object.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Every callsite that use to allocate a rend_data_t object now use the
rend_data_client/service_create() function.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Ground works for fixing #15816. This adds the rend_data_create() function in
order to have a single place where we initialize that data structure.
Furthermore, an array of descriptor IDs is added (one per replica) so we can
keep a copy of the current id in the object. It will be used to purge the
last hid serv request cache using those descriptor IDs. When they change,
they will be replaced and the old ones will be purged from the cache.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Fixes#15850, part of #15801. Change file is added by this commit. The
original comment in the reverted commit is removed because right now we
*need* a DirPort until #15849 is implemented so no doubt nor confusion there
anymore.
This reverts commit 80bed1ac96.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
These commands allow for the creation and management of ephemeral
Onion ("Hidden") services that are either bound to the lifetime of
the originating control connection, or optionally the lifetime of
the tor instance.
Implements #6411.
The SH_LOG_COMPILER feature doesn't work with older automakes, and
those are still in use in many environments we want to support
development on, like Debian Stable.
Instead, use autoconf substitution to fill out the shebang lines on
the shell scripts, and an intermediate make target to make them
executable.
This is a bugfix on the patches for #15344. Bug not in any released
tor.
When we made assertions not get compiled in for the coverage case, we
missed one case where, for our tests, we really DO want to have an
assertion fail: the backtrace test.
Bugfix on 1228dd293b60a8eaab03472fa29428c5e2752c44; bug not in any
released tor
The "longest possible policy" comment in
router_parse_addr_policy_item_from_string() used an example policy
that was actually shorter than the maximum length.
This comment was amended, and expanded to count the maximum number of
characters.
Comment change only.
For this to work bt_test.py now returns an exit code indicating success or
failure. Additionally, check-local and its specific dependencies are now
obsolete so they are removed.
The zero length keys test now requires the path to the Tor binary as the first
parameter to ensure the correct Tor binary is used without hard coding a path.
The wrapper script calls the zero length keys test for each test separately to
ensure the correct shell is used (as configured by autoconf). Another solution
would have been to place the tests into separate functions so multiple tests
could be run internally. This would have made a diff of considerable size and
frankly it is outside the scope of this fix.
Unit tests for the 10 valid combinations of set/NULL config options
DirAuthorities, AlternateBridgeAuthority, AlternateDirAuthority,
and FallbackDir.
Add assertion in consider_adding_dir_servers() for checks in
validate_dir_servers():
"You cannot set both DirAuthority and Alternate*Authority."
Only add the default fallback directories when the DirAuthorities,
AlternateDirAuthority, and FallbackDir directory config options
are set to their defaults.
The default fallback directory list is currently empty, this fix will
only change tor's behaviour when it has default fallback directories.
Fixes bug 15642; bugfix on 90f6071d8d in 0.2.4.7-alpha. Patch by "teor".
When self-testing reachability, use ExtendAllowPrivateAddresses
to determine if local/private addresses imply reachability.
The previous fix used TestingTorNetwork, which implies
ExtendAllowPrivateAddresses, but this excluded rare configs where
ExtendAllowPrivateAddresses is set but TestingTorNetwork is not.
Fixes bug 15771; bugfix on 0.2.6.1-alpha, bug #13924.
Patch by "teor", issue discovered by CJ Ess.
The HS_DESC_CONTENT event results in multiple line thus must be prefixed
with a "650+" and ending with "650 OK".
Reported-by: Damian Johnson <atagar@torproject.org>
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
The HS_DESC event was using rend_data_t from the dir connection to reply the
onion address and authentication type. With the new HSFETCH command, it's
now possible to fetch a descriptor only using the descriptor id thus
resulting in not having an onion address in any HS_DESC event.
This patch removes rend_query from the hs desc control functions and replace
it by an onion address string and an auth type.
On a successful fetch, the service id is taken from the fetched descriptor.
For that, an extra parameter is added to "store as a client" function that
contains the cache entry stored.
This will make the control event functions scale more easily over time if
other values not present in rend_data_t are needed since the rend_data from
the dir connection might not contained everything we need.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Big refactor of the HS client descriptor fetch functionnality. This allows
to fetch an HS descriptor using only a descriptor ID. Furthermore, it's also
possible to provide a list of HSDir(s) now that are used instead of the
automatically choosen one.
The approach taken was to add a descriptor_id field to the rend_data_t
structure so it can be used, if available, by the HS client. The onion
address field however has priority over it that is if both are set, the
onion address is used to fetch the descriptor.
A new public function is introduced called rend_client_fetch_v2_desc(...)
that does NOT lookup the client cache before fetching and can take a list of
HSDirs as a parameter.
The HSFETCH control command now uses this new function thus making it work
and final.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
As defined in section 4.1.26 in the control-spec.txt, this new event replies
the content of a successfully fetched HS descriptor. This also adds a unit
test for the controller event.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
This adds the command on the controller side that parses and validate
arguments but does nothing for now. The HS desriptor fetch must be
modularized a bit more before we can use the command.
See control-spec.txt section 3.26 for more information on this command.
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Incidently, this fixes a bug where the maximum value was never used when
only using crypto_rand_int(). For instance this example below in
rendservice.c never gets to INTRO_POINT_LIFETIME_MAX_SECONDS.
int intro_point_lifetime_seconds =
INTRO_POINT_LIFETIME_MIN_SECONDS +
crypto_rand_int(INTRO_POINT_LIFETIME_MAX_SECONDS -
INTRO_POINT_LIFETIME_MIN_SECONDS);
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
An introduction point is currently rotated when the amount of INTRODUCE2
cells reached a fixed value of 16384. This makes it pretty easy for an
attacker to inflate that number and observe when the IP rotates which leaks
the popularity of the HS (amount of client that passed through the IP).
This commit makes it a random count between the current value of 16384 and
two times that.
Fixes#15745
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
Till someone writes get_interface_address6 interface enumeration that is
routing table aware, these tests will continue to fail on certain
systems because the get_interface_address6() code is broken.
We no longer base our opinion on whether someone is a directory solely
on the routerstatus we might have for that relay, but also on a
routerinfo. Remove logic in test checking that. This broke unit tests in
05f7336624.
Reported by toralf on #tor-dev, thanks!
This uses a Linux-ism to attempt to always clean up background processes
if possible. Note that it is not a catch-all, in that executables with
suid/sgid or elevated capabilities will have the prctl() attribute
stripped as part of the execve().
Resolves ticket 15471.
Background processes spawned by Tor now will have a valid stdin.
Pluggable transports can detect this behavior with the aformentioned
enviornment variable, and exit if stdin ever gets closed.
The compiler is allowed to assume that a "uint64_t *" is aligned
correctly, and will inline a version of memcpy that acts as such.
Use "uint8_t *", so the compiler does the right thing.
It invokes undefined behavior, I'm afraid, since there's no other
c-legal way to test whether memwipe() works when we're not allowed to
look at it.
Closes ticket 15377.
The rend-spec.txt document doesn't specify this extra newline. Furthermore,
this is the only descryptor type that contains one. Client and HSDir without
this patch still work perfectly since the HS descriptor parsing doesn't
expect a newline at the end.
Fixes#15296
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
On clang (and elsewhere?) __PRETTY_FUNCTION__ includes parenthesized
argument lists. This is clever, but it makes our old "%s(): " format
look funny.
This is a fix on 0957ffeb, aka svn:r288. Fixes bug 15269.
Remove src/or/or_sha1.i and src/common/common_sha1.i on `make clean` and remove
the temporary micro-revision file when its no longer needed.
Additional changes;
- show a message when generating the micro-revision file.
- add the temporary micro revision file to the list of files to be removed on
`make clean` just in case.
- fix indentation of the make rule to improve readability.
PTs expect the auth cookie to be available immedieately after launch,
leading to a race condition when PTs opt to cache the extorport cookie
once immediately after startup.
Fixes#15240.
When calling pthread_attr_setdetachstate, we were using 1 as the
argument. But the pthreads documentation says that you have to say
PTHREAD_CREATE_DETACH, which on Solaris is apparently 0x40. Calling
pthread_attr_setdetachstate with 1 crashes on Solaris with FLTBOUNDS.
(Because we're so late in the release cycle, I made the code define
PTHREAD_CREATE_DETACHED if it doesn't exist, so we aren't likely to
break any other platforms.)
This bug was introduced when we made threading mandatory in
0.2.6.1-alpha; previously, we had force-disabled threading on
Solaris. See #9495 discussion.
