Upstream makes 0 mean "min/max supported version". Match that behavior,
although call it "default" instead. It shouldn't get you TLS 1.3 until
we're ready to turn it on everywhere.
BUG=90
Change-Id: I9f122fceb701b7d4de2ff70afbc1ffdf370cb97e
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We'd previously been assuming we'd want to predict P-256 and X25519 but,
on reflection, that's nonsense. Although, today, P-256 is widespread and
X25519 is less so, that's not the right question to ask. Those servers
are all 1.2.
The right question is whether we believe enough servers will get to TLS
1.3 before X25519 to justify wasting 64 bytes on all other connections.
Given that OpenSSL has already shipped X25519 and Microsoft was doing
interop testing on X25519 around when we were shipping it, I think the
answer is no.
Moreover, if we are wrong, it will be easier to go from predicting one
group to two rather than the inverse (provided we send a fake one with
GREASE). I anticipate prediction-miss HelloRetryRequest logic across the
TLS/TCP ecosystem will be largely untested (no one wants to pay an RTT),
so taking a group out of the predicted set will likely be a risky
operation.
Only predicting one group also makes things a bit simpler. I haven't
done this here, but we'll be able to fold the 1.2 and 1.3 ecdh_ctx's
together, even.
Change-Id: Ie7e42d3105aca48eb9d97e2e05a16c5379aa66a3
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The old numbers violate a MUST-level requirement in TLS 1.2 to not
advertise anonymous (0x0700 ends in 0x00). The spec has been updated
with new allocations which avoid these.
BUG=webrtc:6342
Change-Id: Ia5663ada98fa1ebf0f8a7f50fe74a0e9206c4194
Reviewed-on: https://boringssl-review.googlesource.com/11131
Reviewed-by: Adam Langley <agl@google.com>
Found by libFuzzer and then one more mistake caught by valgrind. Add a
test for this case.
Change-Id: I92773bc1231bafe5fc069e8568d93ac0df4c8acb
Reviewed-on: https://boringssl-review.googlesource.com/11129
Reviewed-by: David Benjamin <davidben@google.com>
Upstream added these functions after we did but decided to change the
names slightly. I'm not sure why they wanted to add the "proto" in
there, but align with them nonetheless so the ecosystem only has one set
of these functions.
BUG=90
Change-Id: Ia9863c58c9734374092051f02952b112806040cc
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This is in preparation for using the supported_versions extension to
experiment with draft TLS 1.3 versions, since we don't wish to restore
the fallback. With versions begin opaque values, we will want
version_from_wire to reject unknown values, not attempt to preserve
order in some way.
This means ClientHello.version processing needs to be separate code.
That's just written out fully in negotiate_version now. It also means
SSL_set_{min,max}_version will notice invalid inputs which aligns us
better with upstream's versions of those APIs.
This CL doesn't replace ssl->version with an internal-representation
version, though follow work should do it once a couple of changes land
in consumers.
BUG=90
Change-Id: Id2f5e1fa72847c823ee7f082e9e69f55e51ce9da
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This will make it a little easier to store the normalized version rather
than the wire version. Also document the V2ClientHello behavior.
Change-Id: I5ce9ccce44ca48be2e60ddf293c0fab6bba1356e
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Passing --quiet makes valgrind only print out errors, so we don't need
to suppress things. Combine that with checking valgrind's dedicated exit
code so we notice errors that happen before the "---DONE---" marker.
This makes that marker unnecessary for valgrind. all_tests.go was not
sensitive to this, but still would do well to have valgrind be silent.
Change-Id: I841edf7de87081137e38990e647e989fd7567295
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If the test failed due to non-ASan reasons but ASan also had errors,
output those too.
Change-Id: Id908fe2a823c59255c6a9585dfaa894a4fcd9f59
Reviewed-on: https://boringssl-review.googlesource.com/11127
Reviewed-by: Adam Langley <agl@google.com>
Runner needs to implement fuzzer mode as well so we can record
transcripts from it. A bunch of tests were failing:
- C and Go disagreed on what fuzzer mode did to TLS 1.3 padding. So we
fuzz more code, align Go with C. Fuzzer mode TLS 1.3 still pads but
just skips the final AEAD.
- The deterministic RNG should be applied per test, not per exchange. It
turns out, if your RNG is deterministic, one tends to pick the same
session ID over and over which confuses clients. (Resumption is
signaled by echoing the session ID.)
Now the only failing tests are the ones one would expect to fail.
BUG=79
Change-Id: Ica23881a6e726adae71e6767730519214ebcd62a
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If we see garbage in ClientHello.version and then select static RSA,
that garbage is what goes in the premaster.
Change-Id: I65190a44439745e6b5ffaf7669f063da725c8097
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Plain PSK omits the ServerKeyExchange when there is no hint and includes
it otherwise (it should have always sent it), while other PSK ciphers
like ECDHE_PSK cannot omit the hint. Having different capabilities here
is odd and RFC 4279 5.2 suggests that all PSK ciphers are capable of
"[not] provid[ing] an identity hint".
Interpret this to mean no identity hint and empty identity hint are the
same state. Annoyingly, this gives a plain PSK implementation two
options for spelling an empty hint. The spec isn't clear and this is not
really a battle worth fighting, so I've left both acceptable and added a
test for this case.
See also https://android-review.googlesource.com/c/275217/. This is also
consistent with Android's PskKeyManager API, our only consumer anyway.
https://developer.android.com/reference/android/net/PskKeyManager.html
Change-Id: I8a8e6cc1f7dd1b8b202cdaf3d4f151bebfb4a25b
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One less field to reset on renego and save a pointer of post-handshake
memory.
Change-Id: Ifc0c3c73072af244ee3848d9a798988d2c8a7c38
Reviewed-on: https://boringssl-review.googlesource.com/11086
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This isn't hugely important since the hs object will actually be
released at the end of the handshake, but no sense in holding on to them
longer than needed.
Also release |public_key| when we no longer need it and document what
the fields mean.
Change-Id: If677cb4a915c75405dabe7135205630527afd8bc
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access_denied is only used to indicate client cert errors and Chrome
maps it to ERR_SSL_BAD_CLIENT_AUTH_CERT accordingly:
access_denied
A valid certificate was received, but when access control was
applied, the sender decided not to proceed with negotiation. This
message is always fatal.
We don't appear to be the cause of Chrome's recent
ERR_SSL_BAD_CLIENT_AUTH_CERT spike, but we should send these correctly
nonetheless.
If the early callback fails, handshake_failure seems the most
appropriate ("I was unable to find suitable parameters"). There isn't
really an alert that matches DoS, but internal_error seems okay?
internal_error
An internal error unrelated to the peer or the correctness of the
protocol (such as a memory allocation failure) makes it impossible
to continue. This message is always fatal.
There's nothing wrong, per se, with your ClientHello, but I just can't
deal with it right now. Please go away.
Change-Id: Icd1c998c09dc42daa4b309c1a4a0f136b85eb69d
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This withdraws support for -DBORINGSSL_ENABLE_RC4_TLS, and removes the
RC4 AEADs.
Change-Id: I1321b76bfe047d180743fa46d1b81c5d70c64e81
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Conscrypt would like to write a CTS test that the callback isn't set
unexpectedly.
Change-Id: I11f987422daf0544e90f5cff4d7aaf557ac1f5a2
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I'm not sure what happened here. These are both the same as
MissingKeyShare-Client.
Change-Id: I6601ed378d8639c1b59034f1e96c09a683bb62ca
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Reason for revert: Right now in TLS 1.3, certificate_auth is exactly
the same as whether we're doing resumption. With the weird reauth
stuff punted to later in the spec, having extra state is just more
room for bugs to creep in.
Original issue's description:
> Determining certificate_auth and key_exchange based on SSL.
>
> This allows us to switch TLS 1.3 to use non-cipher based negotiation
> without needing to use separate functions between 1.3 and below.
>
> BUG=77
>
> Change-Id: I9207e7a6793cb69e8300e2c15afe3548cbf82af2
> Reviewed-on: https://boringssl-review.googlesource.com/10803
> Reviewed-by: David Benjamin <davidben@google.com>
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>
Change-Id: I240e3ee959ffd1f2481a06eabece3af554d20ffa
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It's easy to forget to check those. Unfortunately, it's also easy to
forget to check inner structures, which is going to be harder to stress,
but do these to start with. In doing, so fix up and unify some
error-handling, and add a missing check when parsing TLS 1.2
CertificateRequest.
This was also inspired by the recent IETF posting.
Change-Id: I27fe3cd3506258389a75d486036388400f0a33ba
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This will let us use the same test scenarios for testing messages with
trailing garbage or skipped messages.
Change-Id: I9f177983e8dabb6c94d3d8443d224b79a58f40b1
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This was done just by grepping for 'size_t i;' and 'size_t j;'. I left
everything in crypto/x509 and friends alone.
There's some instances in gcm.c that are non-trivial and pulled into a
separate CL for ease of review.
Change-Id: I6515804e3097f7e90855f1e7610868ee87117223
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Change-Id: I676d7fb00d63d74946b96c22ae2705072033c5f7
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This allows us to switch TLS 1.3 to use non-cipher based negotiation
without needing to use separate functions between 1.3 and below.
BUG=77
Change-Id: I9207e7a6793cb69e8300e2c15afe3548cbf82af2
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This simplifies the logic around SSL_clear to reset the state for a new
handshake. The state around here is still a little iffy, but this is a
slight improvement.
The SSL_ST_CONNECT and SSL_ST_ACCEPT states are still kept separate to
avoid problems with the info callback reporting SSL_ST_INIT. Glancing
through info callback consumers, although they're all debugging, they
tend to assume that all intermediate states either have only
SSL_ST_CONNECT set or only SSL_ST_ACCEPT set.
(They also all look identical which makes me think it's copy-and-pasted
from OpenSSL command-line tool or something.)
Change-Id: I55503781e52b51b4ca829256c14de6f5942dae51
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This mechanism is incompatible with deploying draft versions of TLS 1.3.
Suppose a draft M client talks to a draft N server, M != N. (Either M or
N could also be the final standard revision should there be lingering
draft clients or servers.) The server will notice the mismatch and
pretend ClientHello.version is TLS 1.2, not TLS 1.3. But this will
trigger anti-downgrade signal and cause an interop failure! And if it
doesn't trigger, all the clever tricks around ServerHello.random being
signed in TLS 1.2 are moot.
We'll put this back when the dust has settled.
Change-Id: Ic3cf72b7c31ba91e5cca0cfd7a3fca830c493a43
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Not that this matters in the slightest, but the recent IETF mailing
reminded me we don't test this.
Change-Id: I300c96d6a63733d538a7019a7cb74d4e65d0498f
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Although RFC 6066 recommends against it, some servers send a warning
alert prior to ServerHello on SNI mismatch, and, per spec, TLS 1.2
allows it.
We're fine here, but add a test for it. It interacts interestingly with
TLS 1.3 forbidding warning alerts because it happens before version
negotiation.
Change-Id: I0032313c986c835b6ae1aa43da6ee0dad17a97c2
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Now that we have the extern "C++" trick, we can just embed them in the
normal headers. Move the EVP_CIPHER_CTX deleter to cipher.h and, in
doing so, take away a little bit of boilerplate in defining deleters.
Change-Id: I4a4b8d0db5274a3607914d94e76a38996bd611ec
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Change-Id: I00507014c55b2c7fd442a5aa2c3afcbf8c48049b
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Unlike the Scoped* types, bssl::UniquePtr is available to C++ users, and
offered for a large variety of types. The 'extern "C++"' trick is used
to make the C++ bits digestible to C callers that wrap header files in
'extern "C"'.
Change-Id: Ifbca4c2997d6628e33028c7d7620c72aff0f862e
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Add a test that RSA-PSS is available in TLS 1.2 by default, both for
signing and verifying. Note that if a custom SSL_PRIVATE_KEY_METHOD is
used and it sets signing preferences, it won't use RSA-PSS if it doesn't
know about it. (See *-Sign-Negotiate-* tests.)
Change-Id: I3776a0c95480188a135795f7ebf31f2b0e0626cc
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The early callback needs to run before even version negotiation has been
resolved.
Change-Id: Ibb449ccec07dedef19b7827400ef318fa2f422c0
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Changing parameters on renegotiation makes all our APIs confusing. This
one has no reason to change, so lock it down. In particular, our
preference to forbid Token Binding + renego may be overridden at the
IETF, even though it's insane. Loosening it will be a bit less of a
headache if EMS can't change.
https://www.ietf.org/mail-archive/web/unbearable/current/msg00690.html
claims that this is already in the specification and enforced by NSS. I
can't find anything to this effect in the specification. It just says
the client MUST disable renegotiation when EMS is missing, which is
wishful thinking. At a glance, NSS doesn't seem to check, though I could
be misunderstanding the code.
Nonetheless, locking this down is a good idea anyway. Accurate or not,
take the email as an implicit endorsement of this from Mozilla.
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For now, they can be restored by compiling with -DBORINGSSL_RC4_TLS.
Of note, this means that `MEDIUM' is now empty.
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If code tries to inspect the verify result in the case of a failure then
it seems reasonable that the error code should be in there.
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4aa154e08f changed the code to assume that
a session callback will zero the |copy| out-arg before returning NULL.
In practice this doesn't always happen and we should be robust against
it.
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To ease the removal of RC4, use 3DES in cases where RC4 is not required,
but is just a placeholder for "ciphersuite that works in SSLv3."
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nginx consumes these error codes without #ifdefs. Continue to define
them for compatibility, even though we never emit them.
BUG=95
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peer_sigalgs should live on SSL_HANDSHAKE. This both releases a little
bit of memory after the handshake is over and also avoids the bug where
the sigalgs get dropped if SSL_set_SSL_CTX is called at a bad time. See
also upstream's 14e14bf6964965d02ce89805d9de867f000095aa.
This only affects consumers using the old SNI callback and not
select_certificate_cb.
Add a test that the SNI callback works as expected. In doing so, add an
SSL_CTX version of the signing preferences API. This is a property of
the cert/key pair (really just the key) and should be tied to that. This
makes it a bit easier to have the regression test work with TLS 1.2 too.
I thought we'd fixed this already, but apparently not... :-/
BUG=95
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None of these extensions may be negotiated in TLS 1.3 and are otherwise
on by default. Make the future QUIC/TLS1.3 ClientHello a hair smaller.
Change-Id: I613c339d95470676c78f21fd29e888b7701692c6
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Apparently we forgot to do this.
Change-Id: I348cf6d716ae888fddce69ba4801bf09446f5a72
Reviewed-on: https://boringssl-review.googlesource.com/10503
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Chromium has switched to better APIs.
Change-Id: I26209b3a03c6a0db1ddce2f1fc99c8750cf6e56a
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Change-Id: Ie60744761f5aa434a71a998f5ca98a8f8b1c25d5
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I'll hold on regenerating the transcripts until either the protocol has
stablized more or we're ready to start actually deploying some of this,
but we can get this in now.
Confirmed these #ifdef points are covered by tests:
- BadFinished-*-TLS13
- *-InvalidSignature-*-TLS13
BUG=79
Change-Id: I5f6b9d0f50ac33d5cc79688928fb3fdf6df845ae
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However, for now, we will only enable it if TLS 1.3 is offered.
BUG=85
Change-Id: I958ae0adeafee553dbffb966a6fa41f8a81cef96
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Having two copies of this is confusing. This field is inherently tied to
the certificate chain, which lives on SSL_SESSION, so this should live
there too. This also wasn't getting reset correctly on SSL_clear, but
this is now resolved.
Change-Id: I22b1734a93320bb0bf0dc31faa74d77a8e1de906
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As documented by OpenSSL, it does not interact with session resumption
correctly:
https://www.openssl.org/docs/manmaster/ssl/SSL_set_verify_result.html
Sadly, netty-tcnative calls it, but we should be able to get them to
take it out because it doesn't do anything. Two of the three calls are
immediately after SSL_new. In OpenSSL and BoringSSL as of the previous
commit, this does nothing.
The final call is in verify_callback (see SSL_set_verify). This callback
is called in X509_verify_cert by way of X509_STORE_CTX_set_verify_cb.
As soon as X509_verify_cert returns, ssl->verify_result is clobbered
anyway, so it doesn't do anything.
Within OpenSSL, it's used in testdane.c. As far as I can tell, it does
not actually do a handshake and just uses this function to fake having
done one. (Regardless, we don't need to build against that.)
This is done in preparation for removing ssl->verify_result in favor of
session->verify_result.
Change-Id: I7e32d7f26c44f70136c72e58be05a3a43e62582b
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In TLS 1.3 draft 14, due to resumption using a different cipher, this
is actually not too hard to mess up. (In fact BoGo didn't quite get it
right.)
Fortunately, the new cipher suite negotiation in draft 15 should make
this reasonable again once we implement it. In the meantime, test it.
Change-Id: I2eb948eeaaa051ecacaa9095b66ff149582ea11d
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Change-Id: I2e1ee319bb9852b9c686f2f297c470db54f72279
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Per Piotr, all caps is the proper rendering.
Change-Id: I783016a6ed7e29f49369fabbcfa49b66910e4954
Reviewed-on: https://boringssl-review.googlesource.com/10486
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BUG=84
Change-Id: Ie5eaefddd161488996033de28c0ebd1064bb793d
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9498e74 changed the default value of verify_result to an error. This
tripped up NGINX, which depends on a bug[1] in OpenSSL. netty-tcnative
also uses this behavior, though it currently isn't tripped up by 9498e74
because it calls |SSL_set_verify_result|. However, we would like to
remove |SSL_set_verify_result| and with two data points, it seems this
is behavior we must preserve.
This change sets |verify_result| to |X509_V_OK| when a) no client
certificate is requested or b) none is given and it's optional.
[1] See BUGS in https://www.openssl.org/docs/manmaster/ssl/SSL_get_verify_result.html
Change-Id: Ibd33660ae409bfe272963a8c39b7e9aa83c3d635
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s3_both.c does a few too many things right now, but SSL_HANDSHAKE is not
only for TLS 1.3.
Change-Id: Ieac17c592a1271d4d5c9cee005eaf5642772b8f5
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Also fix up those tests as they were a little confused. It is always the
shim that signs and has a configured certificate in these tests.
BUG=95
Change-Id: I57a6b1bad19986c79cd30aaa6cf3b8ca307ef8b2
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One less thing to keep track of.
https://github.com/tlswg/tls13-spec/pull/549 got merged.
Change-Id: Ide66e547140f8122a3b8013281be5215c11b6de0
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The TLS 1.3 state machine is actually less in need of the aggressive
state machine coverage tests, but nonetheless, we should cover all
handshake shapes. PSK resumption and HelloRetryRequest were missing.
We were also accidentally running "DTLS" versions of the TLS 1.3 tests
but silently running TLS 1.2.
Change-Id: I65db4052b89d770db7e47738e73aaadde9634236
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Right now the logic happens twice which is a nuisance.
Change-Id: Ia8155ada0b4479b2ca4be06152b8cd99816e14e8
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Some version mismatch cases were not being covered due to TLS 1.2 and
TLS 1.3 having very different spellings for tickets resumption. Also
explicitly test that TLS 1.2 tickets aren't offered in the TLS 1.3 slot
and vice versa.
Change-Id: Ibe58386ea2004fb3c1af19342b8d808f13f737a9
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BUG=75
Change-Id: Ied864cfccbc0e68d71c55c5ab563da27b7253463
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Much of the ClientHello logic queries hello.vers. To avoid it getting
confused, do all modifications right at the end, otherwise
SendClientVersion also affects whether the key share is sent.
Change-Id: I8be2a4a9807ef9ad88af03971ea1c37e4ba36b9c
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In TLS 1.2 and below, the server is not supposed to echo it, but I just
came across a BigIP server which does. Document this so we know to take
care before trying to flip it in the future.
(It's actually kind of odd that it wasn't allowed to be sent given TLS
1.2 makes supported_groups interact with ECDSA client certificates. Ah
well.)
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The server should not be allowed select a protocol that wasn't
advertised. Callers tend to not really notice and act as if some default
were chosen which is unlikely to work very well.
Change-Id: Ib6388db72f05386f854d275bab762ca79e8174e6
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Since we are eliminating DHE support in TLS, this is just a waste of
bytes.
Change-Id: I3a23ece564e43f7e8874d1ec797def132ba59504
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These are probably a good idea to ship so long as we have the PSK
callbacks at all, but they're not *completely* standard yet and Android
tests otherwise need updating to know about them. We don't care enough
about PSK to be in a rush to ship them, and taking them out is an easier
default action until then.
Change-Id: Ic646053d29b69a114e2efea61d593d5e912bdcd0
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If cert_cb runs asynchronously, we end up repeating a large part of very
stateful ClientHello processing. This seems to be mostly fine and there
are few users of server-side cert_cb (it's a new API in 1.0.2), but it's
a little scary.
This is also visible to external consumers because some callbacks get
called multiple times. We especially should try to avoid that as there
is no guarantee that these callbacks are idempotent and give the same
answer each time.
Change-Id: I212b2325eae2cfca0fb423dace101e466c5e5d4e
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Now that ssl_bytes_to_cipher_list is uninteresting, it can be an
implementation detail of ssl3_choose_cipher. This removes a tiny amount
of duplicated TLS 1.2 / TLS 1.3 code.
Change-Id: I116a6bb08bbc43da573d4b7b5626c556e1a7452d
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It's odd that a function like ssl_bytes_to_cipher_list secretly has side
effects all over the place. This removes the need for the TLS 1.3 code
to re-query the version range, and it removes the requirement that the
RI extension be first.
Change-Id: Ic9af549db3aaa8880f3c591b8a13ba9ae91d6a46
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Between TLS 1.2, TLS 1.3, and the early callback, we've got a lot of
ClientHello parsers. Unify everything on the early callback's parser. As
a side effect, this means we can parse a ClientHello fairly succinctly
from any function which will let us split up ClientHello states where
appropriate.
Change-Id: I2359b75f80926cc7d827570cf33f93029b39e525
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This is more progress in letting other stacks use the test runner.
You can provide a per-shim configuration file that includes:
- A list of test patterns to be suppressed (presumably because
they don't work). This setting is ignored if -test is used.
- A translation table of expected errors to shim-specific errors.
BUG=92
Change-Id: I3c31d136e35c282e05d4919e18ba41d44ea9cf2a
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It was renamed to ticket_liftetime_hint in
1e6f11a7ff, which breaks Qt.
Change-Id: I9c6d3097fe96e669f06a4e0880bd4d7d82b03ba8
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We handle this correctly but never wrote a test for it. Noticed this in
chatting about the second ClientHello.version bug workaround with Eric
Rescorla.
Change-Id: I09bc6c995d07c0f2c9936031b52c3c639ed3695e
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Only X509_up_ref left (it's still waiting on a few external callers).
BUG=89
Change-Id: Ia2aec2bb0a944356cb1ce29f3b58a26bdb8a9977
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Inch towards OpenSSL 1.1.0 compatibility.
BUG=91
Change-Id: Ia45b6bdb5114d0891fdffdef0b5868920324ecec
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tls13_process_certificate can take a boolean for whether anonymous is
allowed. This does change the error on the client slightly, but I think
this is correct anyway. It is not a syntax error for the server to send
no certificates in so far as the Certificate message allows it. It's
just illegal.
Change-Id: I1af80dacf23f50aad0b1fbd884bc068a40714399
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We have tests for this as a server, but none as a client. Extend the
certificate verification tests here. This is in preparation for ensuring
that TLS 1.3 session resumption works correctly.
Change-Id: I9ab9f42838ffd69f73fbd877b0cdfaf31caea707
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No sense in having it in both the 1.2 and 1.3 code.
Change-Id: Ib3854714afed24253af7f4bcee26d25e95a10211
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While the sanity check isn't insane (one should arrange for sessions to
be invalidated once client auth settings change, and a sid_ctx is one
way to do it), this check lives in a poor place to enforce configuration
mistakes. To be effective, it needs to happen at the start of the
handshake, independent of the ClientHello from the peer.
But the benefit this check gives is low compared to the trouble it will
be to continually maintain this difference from OpenSSL (our own
ssl_test and bssl_shim forget to set a dummy sid_ctx). Instead, remove
it so we don't have to duplicate it across TLS 1.2 and TLS 1.3. Also so
we don't have weird failures which only manifest once a resuming client
connects.
Change-Id: Ia7f88711701afde5e26b7782c2264ce78dccc89b
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Extend the DTLS mock clock to apply to sessions too and test that
resumption behaves as expected.
Change-Id: Ib8fdec91b36e11cfa032872b63cf589f93b3da13
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We almost forgot to handle this in TLS 1.3, so add a test for it.
Change-Id: I28600325d8fb6c09365e909db607cbace12ecac7
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We broke this to varying degrees ages ago.
This is the logic to implement the variations of rules in TLS to discard
sessions after a failed connection, where a failed connection could be
one of:
- A connection that was not cleanly shut down.
- A connection that received a fatal alert.
The first one is nonsense since close_notify does not actually work in
the real world. The second is a vaguely more plausible but...
- A stateless ticket-based server can't drop sessions anyway.
- In TLS 1.3, a client may receive many tickets over the lifetime of a
single connection. With an external session cache like ours which may,
in theory, but multithreaded, this will be a huge hassle to track.
- A client may well attempt to establish a connection and reuse the
session before we receive the fatal alert, so any application state we
hope to manage won't really work.
- An attacker can always close the connection before the fatal alert, so
whatever security policy clearing the session gave is easily
bypassable.
Implementation-wise, this has basically never worked. The
ssl_clear_bad_session logic called into SSL_CTX_remove_session which
relied on the internal session cache. (Sessions not in the internal
session cache don't get removed.) The internal session cache was only
useful for a server, where tickets prevent this mechanism from doing
anything. For a client, we since removed the internal session cache, so
nothing got removed. The API for a client also did not work as it gave
the SSL_SESSION, not the SSL, so a consumer would not know the key to
invalidate anyway.
The recent session state splitting change further broke this.
Moreover, calling into SSL_CTX_remove_session logic like that is
extremely dubious because it mutates the not_resumable flag on the
SSL_SESSION which isn't thread-safe.
Spec-wise, TLS 1.3 has downgraded the MUST to a SHOULD.
Given all that mess, just remove this code. It is no longer necessary to
call SSL_shutdown just to make session caching work.
Change-Id: Ib601937bfc5f6b40436941e1c86566906bb3165d
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Save a little bit of typing at the call site.
Change-Id: I818535409b57a694e5e0ea0e9741d89f2be89375
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We will now send tickets as a server and accept them as a
client. Correctly offering and resuming them in the handshake will be
implemented in a follow-up.
Now that we're actually processing draft 14 tickets, bump the draft
version.
Change-Id: I304320a29c4ffe564fa9c00642a4ace96ff8d871
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As of https://github.com/tlswg/tls13-spec/pull/530, they're gone.
They're still allowed just before the ClientHello or ServerHello, which
is kind of odd, but so it goes.
BUG=86
Change-Id: I3d556ab45e42d0755d23566e006c0db9af35b7b6
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Change-Id: Id6a7443246479c62cbe0024e2131a2013959e21e
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Change-Id: I057e19a9547a14b3950395db4318eaf0da01ec13
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OpenSSL 1.1.0 added a function to tell if an SSL* is DTLS or not. This
is probably a good idea, especially since SSL_version returns
non-normalized versions.
BUG=91
Change-Id: I25c6cf08b2ebabf0c610c74691de103399f729bc
Reviewed-on: https://boringssl-review.googlesource.com/9077
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None of the SSL_VERIFY_FAIL_IF_NO_PEER_CERT codepaths will ever be
reached if SSL_VERIFY_PEER is unset. If we've gotten as far as getting a
Certificate message, consider SSL_VERIFY_FAIL_IF_NO_PEER_CERT alone
significant grounds for rejecting no peer certificate.
Change-Id: I2c6be4269d65b2467b86b1fc7d76ac47ca735553
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Change-Id: I998f69269cdf813da19ccccc208b476f3501c8c4
Reviewed-on: https://boringssl-review.googlesource.com/8991
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We'll need to update it on occasion, but we should not update our
default ClientHello without noticing.
Change-Id: I19ca52fdbe10e3ac14413fecd16be2e58af5a1f6
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Where we can move uncommon logic to the caller, we probably ought to.
Change-Id: I54a09fffffc20290be05295137ccb605d562cad0
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SSL_set_bio is a nightmare.
In f715c42322, we noticed that, among
other problems, SSL_set_bio's actual behavior did not match how
SSL_set_rfd was calling it due to an asymmetry in the rbio/wbio
handling. This resulted in SSL_set_fd/SSL_set_rfd calls to crash. We
decided that SSL_set_rfd's believed semantics were definitive and
changed SSL_set_bio.
Upstream, in 65e2d672548e7c4bcb28f1c5c835362830b1745b, decided that
SSL_set_bio's behavior, asymmetry and all, was definitive and that the
SSL_set_rfd crash was a bug in SSL_set_rfd. Accordingly, they switched
the fd callers to use the side-specific setters, new in 1.1.0.
Align with upstream's behavior and add tests for all of SSL_set_bio's
insanity. Also export the new side-specific setters in anticipation of
wanting to be mostly compatible with OpenSSL 1.1.0.
Change-Id: Iceac9508711f79750a3cc2ded081b2bb2cbf54d8
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Change-Id: Idf9db184348140972e57b2a8fa30dc9cb8b2e0f2
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In TLS 1.2, this was allowed to be empty for the weird SHA-1 fallback
logic. In TLS 1.3, not only is the fallback logic gone, but omitting
them is a syntactic error.
struct {
opaque certificate_request_context<0..2^8-1>;
SignatureScheme
supported_signature_algorithms<2..2^16-2>;
DistinguishedName certificate_authorities<0..2^16-1>;
CertificateExtension certificate_extensions<0..2^16-1>;
} CertificateRequest;
Thanks to Eric Rescorla for pointing this out.
Change-Id: I4991e59bc4647bb665aaf920ed4836191cea3a5a
Reviewed-on: https://boringssl-review.googlesource.com/9062
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We were sending decode_error, but the spec explicitly says (RFC 5246):
unsupported_extension
sent by clients that receive an extended server hello containing
an extension that they did not put in the corresponding client
hello. This message is always fatal.
Also add a test for this when it's a known but unoffered extension. We
actually end up putting these in different codepaths now due to the
custom extensions stuff.
Thanks to Eric Rescorla for pointing this out.
Change-Id: If6c8033d4cfe69ef8af5678b873b25e0dbadfc4f
Reviewed-on: https://boringssl-review.googlesource.com/9061
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It seems much safer for the default value of |verify_result| to be an
error value.
Change-Id: I372ec19c41d77516ed12d0169969994f7d23ed70
Reviewed-on: https://boringssl-review.googlesource.com/9063
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We managed to mix two comment styles in the Go license headers and
copy-and-paste it throughout the project.
Change-Id: Iec1611002a795368b478e1cae0b53127782210b1
Reviewed-on: https://boringssl-review.googlesource.com/9060
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BUG=74
Change-Id: I72d52c1fbc3413e940dddbc0b20c7f22459da693
Reviewed-on: https://boringssl-review.googlesource.com/8981
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Change-Id: I5cc194fc0a3ba8283049078e5671c924ee23036c
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To prevent configuration/established session confusion, the handshake
session state is separated into the configured session (ssl->session)
and the newly created session (ssl->s3->new_session). Upon conclusion of
the handshake, the finalized session is stored
in (ssl->s3->established_session). During the handshake, any requests
for the session (SSL_get_session) return a non-resumable session, to
prevent resumption of a partially filled session. Sessions should only
be cached upon the completion of the full handshake, using the resulting
established_session. The semantics of accessors on the session are
maintained mid-renego.
Change-Id: I4358aecb71fce4fe14a6746c5af1416a69935078
Reviewed-on: https://boringssl-review.googlesource.com/8612
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This finishes getting rid of ssl_read_bytes! Now we have separate
entry-points for the various cases. For now, I've kept TLS handshake
consuming records partially. When we do the BIO-less API, I expect that
will need to change, since we won't have the record buffer available.
(Instead, the ssl3_read_handshake_bytes and extend_handshake_buffer pair
will look more like the DTLS side or Go and pull the entire record into
init_buf.)
This change opts to make read_app_data drive the message to completion
in anticipation of DTLS 1.3. That hasn't been specified, but
NewSessionTicket certainly will exist. Knowing that DTLS necessarily has
interleave seems something better suited for the SSL_PROTOCOL_METHOD
internals to drive.
It needs refining, but SSL_PROTOCOL_METHOD is now actually a half-decent
abstraction boundary between the higher-level protocol logic and
DTLS/TLS-specific record-layer and message dispatchy bits.
BUG=83
Change-Id: I9b4626bb8a29d9cb30174d9e6912bb420ed45aff
Reviewed-on: https://boringssl-review.googlesource.com/9001
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Regression tests for upstream's
https://github.com/openssl/openssl/issues/1298.
Also, given that we're now on our third generation of V2ClientHello
handling, I'm sure we'll have a fourth and fifth and one of these days
I'm going to mess this one up. :-)
Change-Id: I6fd8f311ed0939fbbfd370448b637ccc06145021
Reviewed-on: https://boringssl-review.googlesource.com/9040
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Change-Id: I7e85a2677fe28a22103a975d517bbee900c44ac3
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There are many cases where we need |BN_rand_range| but with a minimum
value other than 0. |BN_rand_range_ex| provides that.
Change-Id: I564326c9206bf4e20a37414bdbce16a951c148ce
Reviewed-on: https://boringssl-review.googlesource.com/8921
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We already forbid renego/app-data interleave. Forbid it within a
HelloRequest too because that's nonsense. No one would ever send:
[hs:HelloReq-] [app:Hello world] [hs:-uest]
Add tests for this case.
This is in preparation for our more complex TLS 1.3 post-handshake logic
which is going to go through the usual handshake reassembly logic and,
for sanity, will want to enforce this anyway.
BUG=83
Change-Id: I80eb9f3333da3d751f98f25d9469860d1993a97a
Reviewed-on: https://boringssl-review.googlesource.com/9000
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Per request from EKR. Also we have a lot of long test names, so this
seems generally a good idea.
Change-Id: Ie463f5367ec7d33005137534836005b571c8f424
Reviewed-on: https://boringssl-review.googlesource.com/9021
Reviewed-by: Adam Langley <agl@google.com>
With the previous DTLS change, the dispatch layer only cares about the
end of the handshake to know when to drop the current message. TLS 1.3
post-handshake messages will need a similar hook, so convert it to this
lower-level one.
BUG=83
Change-Id: I4c8c3ba55ba793afa065bf261a7bccac8816c348
Reviewed-on: https://boringssl-review.googlesource.com/8989
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This is in preparation for switching finish_handshake to a
release_current_message hook. finish_handshake in DTLS is also
responsible for releasing any memory associated with extra messages in
the handshake.
Except that's not right and we need to make it an error anyway. Given
that the rest of the DTLS dispatch layer already strongly assumes there
is only one message in epoch one, putting the check in the fragment
processing works fine enough. Add tests for this.
This will certainly need revising when DTLS 1.3 happens (perhaps just a
version check, perhaps bringing finish_handshake back as a function that
can fail... which means we need a state just before SSL_ST_OK), but DTLS
1.3 post-handshake messages haven't really been written down, so let's
do the easy thing for now and add a test for when it gets more
interesting.
This removes the sequence number reset in the DTLS code. That reset
never did anything becase we don't and never will renego. We should make
sure DTLS 1.3 does not bring the reset back for post-handshake stuff.
(It was wrong in 1.2 too. Penultimate-flight retransmits and renego
requests are ambiguous in DTLS.)
BUG=83
Change-Id: I33d645a8550f73e74606030b9815fdac0c9fb682
Reviewed-on: https://boringssl-review.googlesource.com/8988
Reviewed-by: Adam Langley <agl@google.com>
This was only used so we knew when we had a current message to discard
and when we didn't. With init_msg being tracked better, we can use that
instead.
As part of this, switch the V2ClientHello hack to not using
reuse_message. Otherwise we have to fill in init_msg and friends in two
places.
The next change will require that we have a better handle on the "is
there a current message" boolean.
BUG=83
Change-Id: I917efacbad10806d492bbe51eda74c0779084d60
Reviewed-on: https://boringssl-review.googlesource.com/8987
Reviewed-by: Adam Langley <agl@google.com>
Somewhat clearer what it's for than just 4.
Change-Id: Ie7bb89ccdce188d61741da203acd624b49b69058
Reviewed-on: https://boringssl-review.googlesource.com/8986
Reviewed-by: Adam Langley <agl@google.com>
For TLS 1.3, we will need to process more complex post-handshake
messages. It is simplest if we use the same mechanism. In preparation,
allow ssl3_get_message to be called at any point.
Note that this stops reserving SSL3_RT_MAX_PLAIN_LENGTH in init_buf
right off the bat. Instead it will grow as-needed to accomodate the
handshake. SSL3_RT_MAX_PLAIN_LENGTH is rather larger than we probably
need to receive, particularly as a server, so this seems a good plan.
BUG=83
Change-Id: Id7f4024afc4c8a713b46b0d1625432315594350e
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Right now they're RSA PRIVATE KEY or EC PRIVATE KEY which requires a bit
more effort to parse. It means the PEM header is necessary to parse
these. OpenSSL and Go automagically convert the format, but other shims
(namely NSS) may not.
Change-Id: I9fa2767dcf1fe6ceeea546390759e1c364a8f16f
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This API needs to be improved but, for the time being, keep the
invariant reasonable.
Change-Id: If94d41e7e7936e44de5ecb36da45f89f80df7784
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Implemented in preparation for testing the C implementation. Tested
against itself.
BUG=74
Change-Id: Iec1b9ad22e09711fa4e67c97cc3eb257585c3ae5
Reviewed-on: https://boringssl-review.googlesource.com/8873
Reviewed-by: Nick Harper <nharper@chromium.org>
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We still don't do anything useful with them, but we know not to put them
in the session ticket field.
In doing so, fix a bug in the CorruptTicket option where it would crash
if tickets are exactly 40 byets in length.
BUG=75
Change-Id: Id1039a58ed314a67d0af4f2c7e0617987c2bd6b5
Reviewed-on: https://boringssl-review.googlesource.com/8872
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Also parse out the ticket lifetime which was previously ignored.
BUG=75
Change-Id: I6ba92017bd4f1b31da55fd85d2af529fd592de11
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We have no intention of implementing FFDHE and the DHE ciphers currently
don't work in the 1.3 handshake anyway. Cipher suite negotiation is to
be refactored in the spec so these cipher values won't be used for FFDHE
anyway.
Change-Id: I51547761d70a397dc3dd0391b71db98189f1a844
Reviewed-on: https://boringssl-review.googlesource.com/8874
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This change allows the shim to return a magic error code (89) to
indicate that it doesn't implement some of the given flags for a test.
Unimplemented tests are, by default, an error. The --allow-unimplemented
flag to the test runner causes them to be ignored.
This is done in preparation for non-BoringSSL shims.
Change-Id: Iecfd545b9cf44df5e25b719bfd06275c8149311a
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WebRTC want to be able to send a random alert. Add an API for this.
Change-Id: Id3113d68f25748729fd9e9a91dbbfa93eead12c3
Reviewed-on: https://boringssl-review.googlesource.com/8950
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
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Ridiculous as it is, the protocol does not forbid packing HelloRequest
and Finished into the same record. Add a test for this case.
Change-Id: I8e1455b261f56169309070bf44d14d40a63eae50
Reviewed-on: https://boringssl-review.googlesource.com/8901
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
This doesn't do anything since they're for DTLS, but we ought to satisfy
the API nonetheless. expect_flight is easy with
ssl_hs_flush_and_read_message. received_flight I think basically needs
to get sprinkled into the state machine.
Change-Id: I406c7f776ad8e5e3cbcafcac6b26a688c6d3caf1
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Reviewed-by: David Benjamin <davidben@google.com>
It used to give a sensible answer ("no") before version negotiation.
Change-Id: I85b778a48cca7a4b66a81384eb18c447982875d1
Reviewed-on: https://boringssl-review.googlesource.com/8900
Reviewed-by: Matt Braithwaite <mab@google.com>
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Alas, we will need a version fallback for TLS 1.3 again.
This deprecates SSL_MODE_SEND_FALLBACK_SCSV. Rather than supplying a
boolean, have BoringSSL be aware of the real maximum version so we can
change the TLS 1.3 anti-downgrade logic to kick in, even when
max_version is set to 1.2.
The fallback version replaces the maximum version when it is set for
almost all purposes, except for downgrade protection purposes.
BUG=chromium:630165
Change-Id: I4c841dcbc6e55a282b223dfe169ac89c83c8a01f
Reviewed-on: https://boringssl-review.googlesource.com/8882
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Commit-Queue: David Benjamin <davidben@google.com>
It really should take a few more parameters and save a bit of
long-winded initialization work.
Change-Id: I2823f0aa82be39914a156323f6f32b470b6d6a3b
Reviewed-on: https://boringssl-review.googlesource.com/8876
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[Tests added by davidben.]
Change-Id: I0d54a4f8b8fe91b348ff22658d95340cdb48b089
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Change-Id: I92425d7c72111623ddfbe8391f2d2fa88f101ef3
Reviewed-on: https://boringssl-review.googlesource.com/8818
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Share a bit more of it between TLS 1.2 and 1.3.
Change-Id: I43c9dbf785a3d33db1793cffb0fdbd3af075cc89
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This reverts commit 69f40dff83. I'm not
sure why the CQ didn't catch it while the bots didn't, but I'll look
into it after the QUIC BoF.
Change-Id: Ia187787c86aab082b9cffe0c86c828805dfc212d
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Reviewed-by: David Benjamin <davidben@google.com>
We'll need to update it on occasion, but we should not update our
default ClientHello without noticing.
Change-Id: Id9c4734f8e3f8c66b757a82ca123ce949bbcd02e
Reviewed-on: https://boringssl-review.googlesource.com/8845
Reviewed-by: David Benjamin <davidben@google.com>
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Change-Id: Ibde837040d2332bc8570589ba5be9b32e774bfcf
Reviewed-on: https://boringssl-review.googlesource.com/8811
Reviewed-by: David Benjamin <davidben@google.com>
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Change-Id: I55ab20c3add6e504522f3bb7e75aeed7daa0aad7
Reviewed-on: https://boringssl-review.googlesource.com/8851
Reviewed-by: David Benjamin <davidben@google.com>
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This adds three more formats to the SSLKEYLOGFILE format to support TLS
1.3:
EARLY_TRAFFIC_SECRET <client_random> <early_traffic_secret>
HANDSHAKE_TRAFFIC_SECRET <client_random> <handshake_traffic_secret>
TRAFFIC_SECRET_0 <client_random> <traffic_secret_0>
(We don't implement 0-RTT yet, so only the second two are implemented.)
Motivations:
1. If emitted the non-traffic secrets (early, handshake, and master) or
the IKMs, Wireshark needs to maintain a handshake hash. I don't
believe they need to do this today.
2. We don't store more than one non-traffic secret at a time and don't
keep traffic secrets for longer than needed. That suggests three
separate lines logged at different times rather than one line.
3. If 0-RTT isn't used, we probably won't even compute the early traffic
secret, so that further suggests three different lines.
4. If the handshake didn't get far enough to complete, we won't have an
TRAFFIC_SECRET_0 to log at all. That seems like exactly when
Wireshark would be handy, which means we want to log secrets as they
are computed.
MT from NSS has ACK'd over email that this format would be acceptable
for them, so let's go with it.
Change-Id: I4d685a1355dff4d4bd200310029d502bb6c511f9
Reviewed-on: https://boringssl-review.googlesource.com/8841
Reviewed-by: David Benjamin <davidben@google.com>
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Every flush but the last is always immediately followed by a read. Add a
combined wait mode to make things simpler. Unfortunately, both flights
we have (the state machine doesn't write the first ClientHello) are
followed immediately by a state change, which means we still need some
state in between because we must run code after write_message but before
read_message.
(This way to fix that is to get rid of the buffer BIO, change
write_message to write_flight, and allow things like init_message /
finish_message / init_message / finish_message / set_write_state /
init_message / finish_message / write_flight.)
Change-Id: Iebaa388ccbe7fcad48c1b2256e1c0d3a7c9c8a2a
Reviewed-on: https://boringssl-review.googlesource.com/8828
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
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We never had coverage for that codepath.
Change-Id: Iba1b0a3ddca743745773c663995acccda9fa6970
Reviewed-on: https://boringssl-review.googlesource.com/8827
Reviewed-by: David Benjamin <davidben@google.com>
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Change-Id: I0fdd6db9ea229d394b14c76b6ba55f6165a6a806
Reviewed-on: https://boringssl-review.googlesource.com/8826
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
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There is no longer need for the Go code to implement 'fake TLS 1.3'. We
now implement real incomplete TLS 1.3.
Change-Id: I8577100ef8c7c83ca540f37dadd451263f9f37e6
Reviewed-on: https://boringssl-review.googlesource.com/8823
Reviewed-by: David Benjamin <davidben@google.com>
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This is basically the same as BadECDHECurve-TLS13. That the client picks
a share first but the server picks the curve type means there's less
redundancy to deal with.
Change-Id: Icd9a4ecefe8e0dfaeb8fd0b062ca28561b05df98
Reviewed-on: https://boringssl-review.googlesource.com/8817
Reviewed-by: David Benjamin <davidben@google.com>
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Change-Id: Iad572f44448141c5e2be49bf25b42719c625a97a
Reviewed-on: https://boringssl-review.googlesource.com/8812
Reviewed-by: David Benjamin <davidben@google.com>
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This adds the machinery for doing TLS 1.3 1RTT.
Change-Id: I736921ffe9dc6f6e64a08a836df6bb166d20f504
Reviewed-on: https://boringssl-review.googlesource.com/8720
Reviewed-by: David Benjamin <davidben@google.com>
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Change-Id: I1132103bd6c8b01c567b970694ed6b5e9248befb
Reviewed-on: https://boringssl-review.googlesource.com/8816
Reviewed-by: Nick Harper <nharper@chromium.org>
Reviewed-by: David Benjamin <davidben@google.com>
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We already check for ciphers == NULL earlier in the function.
Change-Id: I0e676816d891e1d24cf45cab449c4d3915ec54ee
Reviewed-on: https://boringssl-review.googlesource.com/8815
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
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