This aligns with OpenSSL's behavior. RFC7301 says servers should return
no_application_protocol if the client supported ALPN but no common
protocol was found. We currently interpret all values as
SSL_TLSEXT_ERR_NOACK. Instead, implement both modes and give guidance on
whne to use each. (NOACK is still useful because the callback may be
shared across multiple configurations, some of which don't support ALPN
at all. Those would want to return NOACK to ignore the list.)
To match upstream, I've also switched SSL_R_MISSING_ALPN, added for
QUIC, to SSL_R_NO_APPLICATION_PROTOCOL.
Update-Note: Callers that return SSL_TLSEXT_ERR_ALERT_FATAL from the
ALPN callback will change behavior. The old behavior may be restored by
returning SSL_TLSEXT_ERR_NOACK, though see the documentation for new
recommendations on return values.
Change-Id: Ib7917b5f8a098571bed764c79aa7a4ce0f728297
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/45504
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
QUICHE currently does not know to call
SSL_set_quic_use_legacy_codepoint, picking up the current default of the
legacy code point. It then assumes that the
TLSEXT_TYPE_quic_transport_parameters constant may be used to extract
transport parameters, so after
https://boringssl-review.googlesource.com/c/boringssl/+/44704, it
breaks.
To smooth over the transition, we now define three constants:
TLSEXT_TYPE_quic_transport_parameters_legacy,
TLSEXT_TYPE_quic_transport_parameters_standard, and the old constant.
The old constant will match whatever the default is (for now, legacy) so
the default is self-consistent. Then plan is then:
1. BoringSSL switches to the state in this CL: the default code point
and constant are the legacy one, but there are APIs to specify the
code point. This will not affect QUICHE, which only uses the
defaults.
2. QUICHE calls SSL_set_quic_use_legacy_codepoint and uses the
corresponding _legacy or _standard constant. It should *not* use the
unsuffixed constant at this point.
3. BoringSSL switches the default setting and the constant to the
standard code point. This will not affect QUICHE, which explicitly
configures the code point it wants.
4. Optional: BoringSSL won't switch the default back to legacy, so
QUICHE can switch _standard to unsuffixed and BoringSSL
can remove the _standard alias (but not the function) early.
5. When QUICHE no longer needs both code points, it unwinds the
SSL_set_quic_use_legacy_codepoint code and switches back to the
unsuffixed constant.
6. BoringSSL removes all this scaffolding now that it's no longer
needed.
Update-Note: This this fixes a compatibility issue with
https://boringssl-review.googlesource.com/c/boringssl/+/44704.
Change-Id: I9f75845aba58ba93e9665cd6f05bcd080eb5f139
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/45124
Reviewed-by: David Schinazi <dschinazi@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
When offering 0-RTT, the client should check that all carried-over
values are consistent with its preferences. This ensures that parameter
negotiation happens independently of 0-RTT. The ALPS version of this
check was a tad too aggressive: a session without ALPS should be treated
as always compatible.
I'll follow this with a fix to the draft spec to clarify this.
Change-Id: Ia3c2a60449c555d1d91c4e528215f8e551a90a9f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/45104
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
IETF QUIC draft 33 is replacing the TLS extension
codepoint for QUIC transport parameters from 0xffa5
to 57. To support multiple versions of Chrome, we
need to support both codepoints in BoringSSL. This
CL adds support for the new codepoint in a way that
can be enabled on individual connections.
Note that when BoringSSL is not in QUIC mode, it
will error if it sees the new codepoint as a server
but it will ignore the legacy codepoint as that could
be a different private usage of that codepoint.
Change-Id: I314f8f0b169cedd96eeccc42b44153e97044388c
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/44704
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
This CL implements the backend server behavior described in Section 7.2
of draft-ietf-tls-esni-09.
Bug: 275
Change-Id: I2e162673ce564db0cb75fc9b71ef11ed15037f4b
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/43924
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
IETF QUIC draft 33 is replacing the TLS extension
codepoint for QUIC transport parameters from 0xffa5
to 57. To support multiple versions of Chrome, we
need to support both codepoints in BoringSSL. This
CL adds support for the new codepoint in a way that
can be enabled on individual connections.
Change-Id: I3bf06ea0710702c0dc45bb3ff2e3d772e9f87f9b
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/44585
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
(Original CL by svaldez, reworked by davidben.)
Change-Id: I8570808fa5e96a1c9e6e03c4877039a22e73254f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/42404
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
This version adds signature algorithms to the extension
Change-Id: I91dc78d33ee81cb7a6221c7bdeefc8ea460a2d6c
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/42424
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Update-Note: If an SSL_QUIC_METHOD is set, connections will now fail if
ALPN is not negotiated. This new behavior can be detected by checking
if the value of BORINGSSL_API_VERSION is greater than 10.
Bug: 294
Change-Id: I42fb80aa09268e77cec4a51e49cdad79bd72fa58
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/42304
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
David Benjamin
David Schinazi
Dan McArdle
Adam Langley
Steven Valdez
Watson Ladd
Nick Harper