Ensure we securely wipe keys from memory after
crypto_digest_get_digest and init_curve25519_keypair_from_file
have finished using them.
Fixes bug 13477.
Add unit tests for tor_timegm signed overflow,
tor_timegm and parse_rfc1123_time validity checks,
and correct_tm year clamping.
Unit tests (visible) fixes in bug 13476.
Check all date/time values passed to tor_timegm
and parse_rfc1123_time for validity, taking leap
years into account.
Improves HTTP header validation.
Avoid unlikely signed integer overflow in tor_timegm
on systems with 32-bit time_t.
Fixes bug 13476.
1. The test that adds things to the cache needs to set the clock back so
that the descriptors it adds are valid.
2. We split ROUTER_NOT_NEW into ROUTER_TOO_OLD, so that we can
distinguish "already had it" from "rejected because of old published
date".
3. We make extrainfo_insert() return a was_router_added_t, and we
make its caller use it correctly. This is probably redundant with
the extrainfo_is_bogus flag.
We didn't really have test coverage for these parsing functions, so
I went and made some. These tests also verify that the parsing
functions set the list of invalid digests correctly.
One pain point in evolving the Tor design and implementing has been
adding code that makes clients reject directory documents that they
previously would have accepted, if those descriptors actually exist.
When this happened, the clients would get the document, reject it,
and then decide to try downloading it again, ad infinitum. This
problem becomes particularly obnoxious with authorities, since if
some authorities accept a descriptor that others don't, the ones
that don't accept it would go crazy trying to re-fetch it over and
over. (See for example ticket #9286.)
This patch tries to solve this problem by tracking, if a descriptor
isn't parseable, what its digest was, and whether it is invalid
because of some flaw that applies to the portion containing the
digest. (This excludes RSA signature problems: RSA signatures
aren't included in the digest. This means that a directory
authority can still put another directory authority into a loop by
mentioning a descriptor, and then serving that descriptor with an
invalid RSA signatures. But that would also make the misbehaving
directory authority get DoSed by the server it's attacking, so it's
not much of an issue.)
We already have a mechanism to mark something undownloadable with
downloadstatus_mark_impossible(); we use that here for
microdescriptors, extrainfos, and router descriptors.
Unit tests to follow in another patch.
Closes ticket #11243.
Fix an instance of integer overflow in format_time_interval() when
taking the absolute value of the supplied signed interval value.
Fixes bug 13393.
Create unit tests for format_time_interval().
Bitwise check for the BRIDGE_DIRINFO flag, rather than checking for
equality.
Fixes a (potential) bug where directories offering BRIDGE_DIRINFO,
and some other flag (i.e. microdescriptors or extrainfo),
would be ignored when looking for bridge directories.
Final fix in series for bug 13163.
Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in functions
which take them as arguments. Replace 0 with NO_DIRINFO in a function call
for clarity.
Seeks to prevent future issues like 13163.
Stop using the default authorities in networks which provide both
AlternateDirAuthority and AlternateBridgeAuthority.
This bug occurred due to an ambiguity around the use of NO_DIRINFO.
(Does it mean "any" or "none"?)
Partially fixes bug 13163.
Preserve previous semantics of src/test/test-network.sh by exiting with
the exit status of chutney verify, even though the latest version ends
with chutney stop.
If (GNU) Make 3.81 is running processes in parallel using -j2 (or more),
it waits until all descendent processes have exited before it returns to
the shell.
When a command like "make -j2 test-network" is run, this means that
test-network.sh apparently hangs until it either make is forcibly
terminated, or all the chutney-launched tor processes have exited.
A workaround is to use make without -j, or make -j1 if there is an
existing alias to "make -jn" in the shell.
We resolve this bug in tor by using "chutney stop" after "chutney verify"
in test-network.sh.
Cases that now send errors:
* Malformed IP address (SOCKS5_GENERAL_ERROR)
* CONNECT/RESOLVE request with IP, when SafeSocks is set
(SOCKS5_NOT_ALLOWED)
* RESOLVE_PTR request with FQDN (SOCKS5_ADDRESS_TYPE_NOT_SUPPORTED)
* Malformed FQDN (SOCKS5_GENERAL_ERROR)
* Unknown address type (SOCKS5_ADDRESS_TYPE_NOT_SUPPORTED)
Fixes bug 13314.
Add a --delay option to test-network.sh, which configures the delay before
the chutney network tests for data transmission. The default remains at
18 seconds if the argument isn't specified.
Apparently we should be using bootstrap status for this (eventually).
Partially implements ticket 13161.
The default shell on OS X is bash, which has a builtin echo. When called
in "sh" mode, this echo does not accept "-n". This patch uses "/bin/echo -n"
instead.
Partially fixes issue 13161.
Add the TestingDirAuthVoteExit option, a list of nodes to vote Exit for,
regardless of their uptime, bandwidth, or exit policy.
TestingTorNetwork must be set for this option to have any effect.
Works around an issue where authorities would take up to 35 minutes to
give nodes the Exit flag in a test network, despite short consensus
intervals. Partially implements ticket 13161.
Otherwise, when we authority try to do a self-test because of
init-keys, if that self-test can't be launched for whatever reason and
so we close the channel immediately, we crash.
Yes, this a silly way for initialization to work.
Fixes bug 13295; bugfix on 0.2.5.3-alpha.
The alternative here is to call crypto_global_init() from tor-resolve,
but let's avoid linking openssl into tor-resolve for as long as we
can.
When a spawned process forks, fails, then exits very quickly, (this
typically occurs when exec fails), there is a race condition between the
SIGCHLD handler updating the process_handle's fields, and checking the
process status in those fields. The update can occur before or after the
spawn tests check the process status.
We check whether the process is running or not running (rather than just
checking if it is running) to avoid this issue.
In circuit_build_times_calculate_timeout() in circuitstats.c, avoid dividing
by zero in the pareto calculations.
If either the alpha or p parameters are 0, we would divide by zero, yielding
an infinite result; which would be clamped to INT32_MAX anyway. So rather
than dividing by zero, we just skip the offending calculation(s), and
use INT32_MAX for the result.
Division by zero traps under clang -fsanitize=undefined-trap -fsanitize-undefined-trap-on-error.
Avoid 4 null pointer errors under clang shallow analysis (the default when
building under Xcode) by using tor_assert() to prove that the pointers
aren't null. Resolves issue 13284 via minor code refactoring.
This helps us avoid undefined behavior. It's based on a patch from teor,
except that I wrote a perl script to regenerate the patch:
#!/usr/bin/perl -p -w -i
BEGIN { %vartypes = (); }
if (/^[{}]/) {
%vartypes = ();
}
if (/^ *crypto_int(\d+) +([a-zA-Z_][_a-zA-Z0-9]*)/) {
$vartypes{$2} = $1;
} elsif (/^ *(?:signed +)char +([a-zA-Z_][_a-zA-Z0-9]*)/) {
$vartypes{$1} = '8';
}
# This fixes at most one shift per line. But that's all the code does.
if (/([a-zA-Z_][a-zA-Z_0-9]*) *<< *(\d+)/) {
$v = $1;
if (exists $vartypes{$v}) {
s/$v *<< *(\d+)/SHL$vartypes{$v}($v,$1)/;
}
}
# remove extra parenthesis
s/\(SHL64\((.*)\)\)/SHL64\($1\)/;
s/\(SHL32\((.*)\)\)/SHL32\($1\)/;
s/\(SHL8\((.*)\)\)/SHL8\($1\)/;
There are some loops of the form
for (i=1;i<1;++i) ...
And of course, if the loop index is initialized to 1, it will never
be less than 1, and the loop body will never be executed. This
upsets coverity.
Patch fixes CID 1221543 and 1221542
