Fixed a bug in ssl_srv.c when parsing TLS_FALLBACK_SCSV in the
ciphersuite list that caused it to miss it sometimes. Reported by Hugo
Leisink as issue #810. Fix initially by @andreasag01; this commit
isolates the bug fix and adds a non-regression test.
The TLS client and server code was usually closing the connection in
case of a fatal error without sending an alert. This commit adds
alerts in many cases.
Added one test case to detect that we send the alert, where a server
complains that the client's certificate is from an unknown CA (case
tracked internally as IOTSSL-1330).
Added command line arguments --port and --proxy-port to choose the
ports explicitly instead of deriving them from the PID. This
facilitates debugging e.g. with Wireshark.
Add a test to ssl-opt.sh to ensure that in DTLS a 6 byte record counter
is compared in ssl_check_ctr_renegotiate() instead of a 8 byte one as in
the TLS case. Because currently there are no testing facilities to check
that renegotiation routines are triggered after X number of input/output
messages, the test consists on setting a renegotiation period that
cannot be represented in 6 bytes, but whose least-significant byte is 2.
If the library behaves correctly, the renegotiation routines will be
executed after two exchanged.
In some tests in ssl-opt.sh the client finishes sooner and the server
gets killed before it could reach certain errors. Consequently the
the script doesn't find the error it is looking for and the test fails.
To resolve this issue, we introduce a per-test option to wait after the
client finishes.
Running valgrind on: "DTLS client reconnect from same port: reconnect,
nbio" results in timeouts.
New version added that runs only under valgrind. Original only runs when
valgrind is not used
The glibc package recently enabled compressed debug symbols but valgrind doesn't
support them yet.
Results in messages like:
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
First line has 'error' in it which triggers some of the ssl-opt tests
In order to reduce debugging time, allows you to only run interesting
tests (by number) from the commandline.
e.g. the command 'tests/ssl-opt.sh -n 246,258' will only run test 246
and 258 (as per the number in the log file names)
* development: (73 commits)
Bump yotta dependencies version
Fix typo in documentation
Corrected misleading fn description in ssl_cache.h
Corrected URL/reference to MPI library
Fix yotta dependencies
Fix minor spelling mistake in programs/pkey/gen_key.c
Bump version to 2.1.2
Fix CVE number in ChangeLog
Add 'inline' workaround where needed
Fix references to non-standard SIZE_T_MAX
Fix yotta version dependencies again
Upgrade yotta dependency versions
Fix compile error in net.c with musl libc
Add missing warning in doc
Remove inline workaround when not useful
Fix macroization of inline in C++
Changed attribution for Guido Vranken
Merge of IOTSSL-476 - Random malloc in pem_read()
Fix for IOTSSL-473 Double free error
Fix potential overflow in CertificateRequest
...
Conflicts:
include/mbedtls/ssl_internal.h
library/ssl_cli.c
This extension is quite costly to generate, and we don't want to re-do it
again when the server performs a DTLS HelloVerify. So, cache the result the
first time and re-use if/when we build a new ClientHello.
Note: re-send due to timeouts are different, as the whole message is cached
already, so they don't need any special support.
Let the client retry longer, to make sure the server will time out before the
client gives up. Make it really longer to get a deterministic client exit
status (make sure it has time to reconnect after the server timeout).
This is not very useful for TLS as mbedtls_ssl_write() will automatically
fragment and return the length used, and the application should check for that
anyway, but this is useful for DTLS where mbedtls_ssl_write() returns an
error, and the application needs to be able to query the maximum length
instead of just guessing.
Tends to cause spurious failures on buildbots due to peer timing out.
Anyway, those tests are mainly for interop, any memory error is most likely
catched by some earlier self-op test. (Also, we'll run these tests with ASan
anyway.)
Apparently openssl s_server does not flush stdout, anyway sometimes the client
receives the reply and exits, thus terminating the test, before is request is
visible on the server's stdout. So, just don't check that, checking the
client's output and exit code is already enough.
Retry one time in case we have a client timeout. These should be fairly rare
but still happen from time to time with udp_proxy tests which is annoying, and
until now has never indicated an actual issue.
Rather than flat-out die when we can't see the server started with lsof, just
stop waiting and try to go ahead with the test. Maybe it'll work if there was
a problem with lsof, most probably it will fail, but at least we'll have the
log, and the results of the following tests.
Note: date +%s isn't POSIX, but it works at least on Linux, Darwin/FreeBSD and
OpenBSD, which should be good enough for a test script.
This is not required nor recommended by the protocol, and it's a layering
violation, but it's a know flaw in the protocol that you can't detect a PSK
auth error in any other way, so it is probably the right thing to do.
closes#227
openssl s_server up to 1.0.2.a included uses a 512-bit prime for DH by
default. Since we now require 1024 bit at least, make s_server use decent
params. (1.0.2b and up use acceptable params by default.)
* development:
Adapt tests to new defaults/errors.
Fix typos/cosmetics in Changelog
Disable RC4 by default in example programs.
Add ssl_set_arc4_support()
Set min version to TLS 1.0 in programs
Conflicts:
include/polarssl/ssl.h
library/ssl_cli.c
library/ssl_srv.c
tests/compat.sh
* commit '36adc36':
Add support for getrandom()
Use library default for trunc-hmac in ssl_client2
Make truncated hmac a runtime option server-side
Fix portability issue in script
Specific error for suites in common but none good
Prefer SHA-1 certificates for pre-1.2 clients
Some more refactoring/tuning.
Minor refactoring
Conflicts:
include/polarssl/error.h
include/polarssl/ssl.h
library/error.c
* commit 'b2eaac1':
Stop assuming chars are signed
Add tests for CBC record splitting
Fix tests that were failing with record splitting
Allow disabling record splitting at runtime
Add 1/n-1 record splitting
Enhance doc on ssl_write()
Conflicts:
include/polarssl/ssl.h
programs/ssl/ssl_client2.c
programs/ssl/ssl_server2.c
* commit 'f6080b8':
Fix warning in reduced configs
Adapt to "negative" switch for renego
Add tests for periodic renegotiation
Make renego period configurable
Auto-renegotiate before sequence number wrapping
Update Changelog for compile-option renegotiation
Switch from an enable to a disable flag
Save 48 bytes if SSLv3 is not defined
Make renegotiation a compile-time option
Add tests for renego security enforcement
Conflicts:
include/polarssl/ssl.h
library/ssl_cli.c
library/ssl_srv.c
library/ssl_tls.c
programs/ssl/ssl_server2.c
tests/ssl-opt.sh
With exchanges == renego period, sometimes the connection will be closed by
the client before the server had time to read the ClientHello, making the test
fail. The extra exchange avoids that.
Rationale: if people want to disable RC4 but otherwise keep the default suite
list, it was cumbersome. Also, since it uses a global array,
ssl_list_ciphersuite() is not a convenient place. So the SSL modules look like
the best place, even if it means temporarily adding one SSL setting.
Reading the documentation of ssl_set_truncated_hmac() may give the impression
I changed the default for clients but I didn't, the old documentation was
wrong.
* etm:
Fix warning in reduced config
Update Changelog for EtM
Keep EtM state across renegotiations
Adjust minimum length for EtM
Don't send back EtM extension if not using CBC
Fix for the RFC erratum
Implement EtM
Preparation for EtM
Implement initial negotiation of EtM
Conflicts:
include/polarssl/check_config.h
* session-hash:
Update Changelog for session-hash
Make session-hash depend on TLS versions
Forbid extended master secret with SSLv3
compat.sh: allow git version of gnutls
compat.sh: make options a bit more robust
Implement extended master secret
Add negotiation of Extended Master Secret
Conflicts:
include/polarssl/check_config.h
programs/ssl/ssl_server2.c
It makes not sense to keep the connection open until the client is verified.
Until now it was useful since closing it crates a race where the second
ClientHello might be lost. But now that our client is able to resend, that's
not an issue any more.
Works only with GnuTLS for now, OpenSSL packs other records in the same
datagram after the last fragmented one, which we don't handle yet.
Also, ssl-opt.sh fails the tests with valgrind for now: we're so slow with
valgrind that gnutls-serv retransmits some messages, and we don't handle
duplicated messages yet.
The meaning of debug_level was shift by one during the last debug overhaul.
(The new one is more rational, previously debug_level=1 didn't do anything.)
Goal is to test renegotiation better: we need more than one exchange for
server-initiated renego to work reliably (the previous hack for this wouldn't
work with non-blocking I/O and probably not with DTLS either).
Also check message termination in a semi-realistic way.
This reverts commit db2a6c1a20.
Does not seem to work as expected on the buildbots. Reverted while
investigating, since it had no other used than speeding up the test script.
