There are currently 4 tests in ssl-opt.sh with either -C "resend" or -S
"resend", that is, asserting that no retransmission will occur. They sometimes
fail on loaded CI machines as one side doesn't send a message fast enough,
causing the other side to retransmit, causing the test to fail.
(For the "reconnect" test there was an other issue causing random failures,
fixed in a previous commit, but even after that fix the test would still
sometimes randomly fail, even if much more rarely.)
While it's a hard problem to fix in a general and perfect way, in practice the
probability of failures can be drastically reduced by making the timeout
values much larger.
For some tests, where retransmissions are actually expected, this would have
the negative effect of increasing the average running time of the test, as
each side would wait for longer before it starts retransmission, so we have a
trade-off between average running time and probability of spurious failures.
But for tests where retransmission is not expected, there is no such trade-off
as the expected running time of the test (assuming the code is correct most of
the time) is not impacted by the timeout value. So the only negative effect of
increasing the timeout value is on the worst-case running time on the test,
which is much less important, as test should only fail quite rarely.
This commit addresses the easy case of tests that don't expect retransmission
by increasing the value of their timeout range to 10s-20s. This value
corresponds to the value used for tests that assert `-S "autoreduction"` which
are in the same case and where the current value seems acceptable so far.
It also represents an increase, compared to the values before this commit, of
a factor 20 for the "reconnect" tests which were frequently observed to fail
in the CI, and of a factor 10 for the first two "DTLS proxy" tests, which were
observed to fail much less frequently, so hopefully the new values are enough
to reduce the probability of spurious failures to an acceptable level.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The server must check client reachability (we chose to do that by checking a
cookie) before destroying the existing association (RFC 6347 section 4.2.8).
Let's make sure we do, by having a proxy-in-the-middle inject a ClientHello -
the server should notice, but not destroy the connection.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
- "Default" should only be used for tests that actually use the defaults (ie,
not passing options on the command line, except maybe debug/dtls)
- All tests in the "Encrypt then MAC" group should start with that string as a
common prefix
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
`pylint3 --version` will output to stderr the status of the config file it's
using. This can be "No config file found" or "Using config file" or nothing.
This means the pylint version may or may not be on the first line.
Therefore this commit changes the filters on the pylint3 version output to first
strip out the config line, and then to select only the pylint line.
Signed-off-by: Simon Butcher <simon.butcher@arm.com>
Add the versions of Python, Perl, and Pylint to the version dump provided by
the output_env.sh script.
Signed-off-by: Simon Butcher <simon.butcher@arm.com>
A number of clean-up improvements following review.
* removal of redundant `` quotes
* removal of non-portable echo "\n", in favour of additional echo commands
* change to use of uname to detemine if the platform is Linux or not
* revised formatting of output
* change to dpkg-query from dpkg to find installed libasan variants
Co-Authored-By: Gilles Peskine <gilles.peskine@arm.com>
Signed-off-by: Simon Butcher <simon.butcher@arm.com>
This commit adds additional information to the output_env.sh script of:
* Linux distribution version (if available)
* GDB version (if available)
It also makes some information clearer:
* the type of OpenSSL/GNUTLS version (legacy/default)
* and whether certain versions are not installed, or not configured
And it simplifies the error messages for absent tools.
Signed-off-by: Simon Butcher <simon.butcher@arm.com>
This commit only addresses the timeouts in the "DTLS proxy: 3d, ..." tests.
The discrepancy with the 2.16 branch became apparent for some of these tests
when backporting the previous commit (skip_close_nofity), so let's align the
whole series for consistency and to make future backporting easier.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The ssl-opt.sh test cases using session resumption tend to fail occasionally
on the CI due to a race condition in how ssl_server2 and ssl_client2 handle
the reconnection cycle.
The server does the following in order:
- S1 send application data
- S2 send a close_notify alert
- S3 close the client socket
- S4 wait for a "new connection" (actually a new datagram)
- S5 start a handshake
The client does the following in order:
- C1 wait for and read application data from the server
- C2 send a close_notify alert
- C3 close the server socket
- C4 reset session data and re-open a server socket
- C5 start a handshake
If the client has been able to send the close_notify (C2) and if has been
delivered to the server before if closes the client socket (S3), when the
server reaches S4, the datagram that we start the new connection will be the
ClientHello and everything will be fine.
However if S3 wins the race and happens before the close_notify is delivered,
in S4 the close_notify is what will be seen as the first datagram in a new
connection, and then in S5 this will rightfully be rejected as not being a
valid ClientHello and the server will close the connection (and go wait for
another one). The client will then fail to read from the socket and exit
non-zero and the ssl-opt.sh harness will correctly report this as a failure.
In order to avoid this race condition in test using ssl_client2 and
ssl_server2, this commits introduces a new command-line option
skip_close_notify to ssl_client2 and uses it in all ssl-opt.sh tests that use
session resumption with DTLS and ssl_server2.
This works because ssl_server2 knows how many messages it expects in each
direction and in what order, and closes the connection after that rather than
relying on close_notify (which is also why there was a race in the first
place).
Tests that use another server (in practice there are two of them, using
OpenSSL as a server) wouldn't work with skip_close_notify, as the server won't
close the connection until the client sends a close_notify, but for the same
reason they don't need it (there is no race between receiving close_notify and
closing as the former is the cause of the later).
An alternative approach would be to make ssl_server2 keep the connection open
until it receives a close_notify. Unfortunately it creates problems for tests
where we simulate a lossy network, as the close_notify could be lost (and the
client can't retransmit it). We could modify udp_proxy with an option to never
drop alert messages, but when TLS 1.3 comes that would no longer work as the
type of messages will be encrypted.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The Mbed TLS project no longer requires a CLA. Contributions from now on
must be made under both Apache-2.0 AND GPL-2.0-or-later licenses, to enable
LTS (Long Term Support) branches of the software to continue to be provided
under either Apache-2.0 OR GPL-2.0-or-later. Contributors must accept the
terms of the Developer Certificate of Origin (DCO) by adding a
Signed-off-by: line to each commit message.
The software on the development branch continues to be provided under
Apache-2.0.
Add CONTRIBUTING.md, and update README.md and pull_request_template.md to
explain the new licensing model. Add a copy of the DCO to the project.
Signed-off-by: Dan Handley <dan.handley@arm.com>
Some code paths want to access members of the mbedtls_rsa_context structure.
We can only do that when using our own implementation, as otherwise we don't
know anything about that structure.
(Only the top-level ones, ie, for each call to eg asn1_get_mpi(), ensure
there's at least one test case that makes this call fail in one way, but don't
test the various ways to make asn1_get_mpi fail - that should be covered
elsewhere.)
- the new checks added by the previous commits needed exercising
- existing tests sometimes had wrong descriptions or where passing for the
wrong reason (eg with the "length mismatch" test, the function actually
failed before reaching the length check)
- while at it, add tests for the rest as well
The valid minimal-size key was generated with:
openssl genrsa 128 2>/dev/null | openssl rsa -outform der 2>/dev/null | xxd -p
When parsing a PKCS#1 RSAPrivateKey structure, all parameters are always
present. After importing them, we need to call rsa_complete() for the sake of
alternative implementations. That function interprets zero as a signal for
"this parameter was not provided". As that's never the case, we mustn't pass
any zero value to that function, so we need to explicitly check for it.
This reverts commit 130e136439, reversing
changes made to 071b3e170e.
stat() will never return S_IFLNK as the file type, as stat() explicitly
follows symlinks.
Fixes#3005.
Goals:
* Build with common compilers with common options, so that we don't
miss a (potentially useful) warning only triggered with certain
build options.
* A previous commit removed -O0 test jobs, leaving only the one with
-m32. We have inline assembly that is disabled with -O0, falling
back to generic C code. This commit restores a test that runs the
generic C code on a 64-bit platform.
If Y was constructed through functions in this module, then Y->n == 0
iff Y->p == NULL. However we do not prevent filling mpi structures
manually, and zero may be represented with n=0 and p a valid pointer.
Most of the code can cope with such a representation, but for the
source of mbedtls_mpi_copy, this would cause an integer underflow.
Changing the test for zero from Y->p==NULL to Y->n==0 causes this case
to work at no extra cost.
In the 2.7 branch, test-ca.crt has all the components of its Subject name
encoded as PrintableString, because it's generated with our cert_write
program, and our code writes all components that way until Mbed TLS 2.14.
But the default RSA SHA-256 certificate, server2-sha256.crt, has the O and CN
components of its Issuer name encoded as UTF8String, because it was generated
with OpenSSL and that's what OpenSSL does, regardless of how those components
were encoded in the CA's Subject name.
This triggers some overly strict behaviour in some libraries, most notably NSS
and GnuTLS (of interest to us in ssl-opt.sh) which won't recognize the trusted
root as a possible parent for the presented certificate, see for example:
https://github.com/ARMmbed/mbedtls/issues/1033
Fortunately, we have at our disposal a version of test-ca.crt with encodings
matching the ones in server2-sha256.crt, in the file test-ca_utf8.crt. So
let's append that to gnutls-cli's list of trusted roots, so that it recognizes
certs signed by this CA but with the O and CN components as UTF8String.
Note: Since https://github.com/ARMmbed/mbedtls/pull/1641 was merged (in Mbed
TLS 2.14), we changed how we encode those components, so in the 2.16 branch,
cert_write generates test-ca.crt with encodings that matches the ones used by
openssl when generating server2-sha256.crt, so the issue of gnutls-cli
rejecting server2-sha256.crt is specific to the 2.7 branch.
The comment on TEST_SRV_CRT_RSA_SHA256 that it was
tests/data_files/server2-sha256.crt was a lie, the contents were actually
those of the mbedtls-2.16 version of the same file.
While it didn't have a noticeable impact on its own, it was confusing and
distracting while investigating an issue that cause gnutls-cli to not trust
the default RSA-SHA256 cert given test-ca.crt as a root, so worth fixing.
