boringssl/ssl/test
David Benjamin 492c9aa90c Fill in a fake session ID for TLS 1.3.
Historically, OpenSSL filled in a fake session ID for ticket-only
client sessions. Conscrypt relies on this to implement some weird Java
API where every session has an ID and may be queried out of the client
session cache and, e.g., revoked that way.

(Note that a correct client session cache is not keyed by session ID and
indeed this allows one server to knock out another server's sessions by
matching session IDs. But existing APIs are existing APIs.)

For consistency between TLS 1.2 and TLS 1.3, as well as matching
OpenSSL's TLS 1.3 implementation, do the same in TLS 1.3. Note this
smooths over our cross-version resumption tests by allowing for
something odd: it is now syntactically possible to resume a TLS 1.3
session at TLS 1.2. It doesn't matter either way, but now a different
codepath rejects certain cases.

Change-Id: I9caf4f0c3b2e2e24ae25752826d47bce77e65616
Reviewed-on: https://boringssl-review.googlesource.com/31525
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2018-09-06 18:12:11 +00:00
..
runner Fill in a fake session ID for TLS 1.3. 2018-09-06 18:12:11 +00:00
async_bio.cc Work around language and compiler bug in memcpy, etc. 2016-12-21 20:34:47 +00:00
async_bio.h
bssl_shim.cc Implement TLS 1.3 anti-downgrade signal. 2018-08-15 15:23:43 +00:00
CMakeLists.txt Add handshaker as run_tests dependency. 2018-08-01 23:47:11 +00:00
fuzzer_tags.h Fuzz SSL_serialize_handoff() and SSL_serialize_handback(). 2018-05-05 02:41:04 +00:00
fuzzer.h Remove SSL 3.0 implementation. 2018-06-28 16:54:58 +00:00
handshake_util.cc shim: don't clear environment when invoking handshaker. 2018-08-28 17:50:26 +00:00
handshake_util.h shim: perform split handshakes in a separate binary. 2018-08-01 01:44:53 +00:00
handshaker.cc handshaker: kick PRNG when resuming in UNSAFE_DETERMINISTIC_MODE. 2018-08-03 23:11:46 +00:00
packeted_bio.cc Remove support for blocking DTLS timeout handling. 2017-03-01 19:59:28 +00:00
packeted_bio.h Remove support for blocking DTLS timeout handling. 2017-03-01 19:59:28 +00:00
PORTING.md
README.md
settings_writer.cc shim: move |SettingsWriter| into its own file. 2018-07-02 22:26:28 +00:00
settings_writer.h shim: move |SettingsWriter| into its own file. 2018-07-02 22:26:28 +00:00
test_config.cc Implement TLS 1.3 anti-downgrade signal. 2018-08-15 15:23:43 +00:00
test_config.h Implement TLS 1.3 anti-downgrade signal. 2018-08-15 15:23:43 +00:00
test_state.cc shim: perform split handshakes in a separate binary. 2018-08-01 01:44:53 +00:00
test_state.h shim: perform split handshakes in a separate binary. 2018-08-01 01:44:53 +00:00

BoringSSL SSL Tests

This directory contains BoringSSL's protocol-level test suite.

Testing a TLS implementation can be difficult. We need to produce invalid but sufficiently correct handshakes to get our implementation close to its edge cases. TLS's cryptographic steps mean we cannot use a transcript and effectively need a TLS implementation on the other end. But we do not wish to litter BoringSSL with options for bugs to test against.

Instead, we use a fork of the Go crypto/tls package, heavily patched with configurable bugs. This code, along with a test suite and harness written in Go, lives in the runner directory. The harness runs BoringSSL via a C/C++ shim binary which lives in this directory. All communication with the shim binary occurs with command-line flags, sockets, and standard I/O.

This strategy also ensures we always test against a second implementation. All features should be implemented twice, once in C for BoringSSL and once in Go for testing. If possible, the Go code should be suitable for potentially upstreaming. However, sometimes test code has different needs. For example, our test DTLS code enforces strict ordering on sequence numbers and has controlled packet drop simulation.

To run the tests manually, run go test from the runner directory. It takes command-line flags found at the top of runner/runner.go. The -help option also works after using go test -c to make a runner.test binary first.

If adding a new test, these files may be a good starting point:

  • runner/runner.go: the test harness and all the individual tests.
  • runner/common.go: contains the Config and ProtocolBugs struct which control the Go TLS implementation's behavior.
  • test_config.h, test_config.cc: the command-line flags which control the shim's behavior.
  • bssl_shim.cc: the shim binary itself.

For porting the test suite to a different implementation see PORTING.md.