We broke this a while back and nothing noticed. (Note dereference just
above.) Therefore I guess we don't need to support it.
Change-Id: I501d43825e89acb5f7f13998541dc8ff59452a99
Reviewed-on: https://boringssl-review.googlesource.com/31144
Commit-Queue: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Works in the 1.3 and 1.2 client handshakes, not implemented on the
server for now.
Creates an SSL_CTX option to reverify the server certificate on session
resumption. Reverification only runs the client's certificate verify callback.
Adds new states to the client handshakes: state_reverify_server_certificate in
TLS 1.2, and state_server_certificate_reverify in TLS 1.3.
Adds a negative test to make sure that by default we don't verify the
certificate on resumption, and positive tests that make sure we do when the
new option is set.
Change-Id: I3a47ff3eacb3099df4db4c5bc57f7c801ceea8f1
Bug: chromium:347402
Reviewed-on: https://boringssl-review.googlesource.com/29984
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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These functions can be used to configure the signature algorithms. One
of them is a string mini-languaging parsing function, which we generally
dislike because it defeats static analysis. However, some dependent
projects (in this case TensorFlow) need it and we also dislike making
people patch.
Change-Id: I13f990c896a7f7332d78b1c351357d418ade8d11
Reviewed-on: https://boringssl-review.googlesource.com/30304
Reviewed-by: Steven Valdez <svaldez@google.com>
Thanks to Tom Thorogood for catching this.
Change-Id: I09fa5d9822b9ba13b106add251e26c6ebee21b03
Reviewed-on: https://boringssl-review.googlesource.com/29825
Reviewed-by: Tom Thorogood <me+google@tomthorogood.co.uk>
Reviewed-by: Steven Valdez <svaldez@chromium.org>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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Callers who use SSL_get0_certificate_types today will find an empty list
in TLS 1.3, which removed it. To provide feature parity, add an accessor
for the signature algorithms list. SSL_get_signature_algorithm_key_type
can be used to map it to a key type.
"Peer signature algorithms" was already taken in the public API by
SSL_get_peer_signature_algorithm to refer to which the peer selected, so
I named this matching SSL_CTX_set_verify_algorithm_prefs.
Change-Id: I12d411d7350e744ed9f88c610df48e0d9fc13256
Reviewed-on: https://boringssl-review.googlesource.com/29684
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Vartanian <flooey@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
While I'm here, remove the silly "tlsext_" prefix. At this point it's no
longer novel that a feature is encoded in an extension.
Change-Id: Ib5fbd2121333a213bdda0332885a8c90036ebc4d
Reviewed-on: https://boringssl-review.googlesource.com/29592
Reviewed-by: Adam Langley <agl@google.com>
This doesn't actually make use of much of C++ yet. (SSL_CTX and
SSL/SSL_CONFIG carry analogous versions of a number of fields. It's
difficult to switch them to UniquePtr separately.)
Change-Id: Ia948f539c5c90e2d8301193f719604a31be17fc4
Reviewed-on: https://boringssl-review.googlesource.com/29589
Reviewed-by: Adam Langley <agl@google.com>
It's 2018, but passing STL objects across the API boundary turns out to
still be more bother than it's worth. Since we're dropping UniquePtr in
the API anyway, go the whole way and make it a plain-C API.
Change-Id: Ic0202012e5d81afe62d71b3fb57e6a27a8f63c65
Update-note: this will need corresponding changes to the internal use of SSL_CTX_add_cert_compression_alg.
Reviewed-on: https://boringssl-review.googlesource.com/29564
Reviewed-by: David Benjamin <davidben@google.com>
Previously we'd partially attempted the ssl_st / bssl::SSLConnection
subclassing split, but that gets messy when we actually try to add a
destructor, because CRYPTO_EX_DATA's cleanup function needs an ssl_st*,
not a bssl::SSLConnection*. Downcasting is technically undefined at this
point and will likely offend some CFI-like check.
Moreover, it appears that even with today's subclassing split,
New<SSL>() emits symbols like:
W ssl_st*& std::forward<ssl_st*&>(std::remove_reference<ssl_st*&>::type&)
The compiler does not bother emitting them in optimized builds, but it
does suggest we can't really avoid claiming the ssl_st type name at the
symbol level, short of doing reinterpret_casts at all API boundaries.
And, of course, we've already long claimed it at the #include level.
So I've just left this defining directly on ssl_session_st. The cost is
we need to write some silly "bssl::" prefixes in the headers, but so it
goes. In the likely event we change our minds again, we can always
revise this.
Change-Id: Ieb429e8eaabe7c2961ef7f8d9234fb71f19a5e2a
Reviewed-on: https://boringssl-review.googlesource.com/29587
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
lh_FOO_retrieve is often called with a dummy instance of FOO that has
only a few fields filled in. This works fine for C, but a C++
SSL_SESSION with destructors is a bit more of a nuisance here.
Instead, teach LHASH to allow queries by some external key type. This
avoids stack-allocating SSL_SESSION. Along the way, fix the
make_macros.sh script.
Change-Id: Ie0b482d4ffe1027049d49db63274c7c17f9398fa
Reviewed-on: https://boringssl-review.googlesource.com/29586
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
This partitions the session ID space of the internal cache by version,
which is nominally something we want, but we must check the version
externally anyway for both tickets and external session cache. That
makes this measure redundant. (Servers generate session IDs and 2^256 is
huge, so there would never accidentally be a collision.)
This cuts down on the "key" in the internal session cache, which will
simplify adding something like an lh_SSL_SESSION_retrieve_key function.
(LHASH is currently lax about keys because it can freely stack-allocate
partially-initialized structs. C++ is a bit more finicky about this.)
Change-Id: I656fd9dbf023dccb163d2e8049eff8f1f9a0e21b
Reviewed-on: https://boringssl-review.googlesource.com/29585
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
bssl::UniquePtr and FOO_up_ref do not play well together. Add a helper
to simplify this. This allows us to write things like:
foo->cert = UpRef(bar->cert);
instead of:
if (bar->cert) {
X509_up_ref(bar->cert.get());
}
foo->cert.reset(bar->cert.get());
This also plays well with PushToStack. To append something to a stack
while taking a reference, it's just:
PushToStack(certs, UpRef(cert))
Change-Id: I99ae8de22b837588a2d8ffb58f86edc1d03ed46a
Reviewed-on: https://boringssl-review.googlesource.com/29584
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
Update-Note: SSL_CTX_set_min_proto_version(SSL3_VERSION) now fails.
SSL_OP_NO_SSLv3 is now zero. Internal SSL3-specific "AEAD"s are gone.
Change-Id: I34edb160be40a5eea3e2e0fdea562c6e2adda229
Reviewed-on: https://boringssl-review.googlesource.com/29444
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
Update-Note: This tweaks the SSL_shutdown behavior. OpenSSL's original
SSL_shutdown behavior was an incoherent mix of discarding the record and
rejecting it (it would return SSL_ERROR_SYSCALL but retrying the
operation would discard it). SSLeay appears to have intended to discard
it, so we previously "fixed" it actually discard.
However, this behavior is somewhat bizarre and means we skip over
unbounded data, which we typically try to avoid. If you are trying to
cleanly shutdown the TLS portion of your protocol, surely it is at a
point where additional data is a syntax error. I suspect I originally
did not realize that, because the discarded record did not properly
continue the loop, SSL_shutdown would appear as if it rejected the data,
and so it's unlikely anyone was relying on that behavior.
Discussion in https://github.com/openssl/openssl/pull/6340 suggests
(some of) upstream also prefers rejecting.
Change-Id: Icde419049306ed17eb06ce1a7e1ff587901166f3
Reviewed-on: https://boringssl-review.googlesource.com/28864
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Steven Valdez <svaldez@google.com>
This change adds server-side support for compressed certificates.
(Although some definitions for client-side support are included in the
headers, there's no code behind them yet.)
Change-Id: I0f98abf0b782b7337ddd014c58e19e6b8cc5a3c2
Reviewed-on: https://boringssl-review.googlesource.com/27964
Reviewed-by: David Benjamin <davidben@google.com>
Previously, we'd omitted OpenSSL's OCSP APIs because they depend on a
complex OCSP mechanism and encourage the the unreliable server behavior
that hampers using OCSP stapling to fix revocation today. (OCSP
responses should not be fetched on-demand on a callback. They should be
managed like other server credentials and refreshed eagerly, so
temporary CA outage does not translate to loss of OCSP.)
But most of the APIs are byte-oriented anyway, so they're easy to
support. Intentionally omit the one that takes a bunch of OCSP_RESPIDs.
The callback is benign on the client (an artifact of OpenSSL reading
OCSP and verifying certificates in the wrong order). On the server, it
encourages unreliability, but pyOpenSSL/cryptography.io depends on this.
Dcument that this is only for compatibility with legacy software.
Also tweak a few things for compatilibility. cryptography.io expects
SSL_CTX_set_read_ahead to return something, SSL_get_server_tmp_key's
signature was wrong, and cryptography.io tries to redefine
SSL_get_server_tmp_key if SSL_CTRL_GET_SERVER_TMP_KEY is missing.
Change-Id: I2f99711783456bfb7324e9ad972510be8a95e845
Reviewed-on: https://boringssl-review.googlesource.com/28404
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
This is done by adding two new tagged data types to the shim's
transcript: one for the serialized handoff, and another for the
serialized handback.
Then, the handshake driver in |TLSFuzzer| is modified to be able to
drive a handoff+handback sequence in the same way as was done for
testing: by swapping |BIO|s into additional |SSL| objects. (If a
particular transcript does not contain a serialized handoff, this is a
no-op.)
Change-Id: Iab23e4dc27959ffd3d444adc41d40a4274e83653
Reviewed-on: https://boringssl-review.googlesource.com/27204
Commit-Queue: Matt Braithwaite <mab@google.com>
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These are also not needed after the handshake.
Change-Id: I5de2d5cf18a3783a6c04c0a8fe311069fb51b939
Reviewed-on: https://boringssl-review.googlesource.com/27986
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Commit-Queue: Steven Valdez <svaldez@google.com>
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The TLS 1.3 client logic used ctx instead. This is all moot as
SSL_set_SSL_CTX on a client really wouldn't work, but we should be
consistent. Unfortunately, this moves moving the pointer back to SSL
from SSL_CONFIG.
Change-Id: I45f8241e16f499ad416afd5eceb52dc82af9c4f4
Reviewed-on: https://boringssl-review.googlesource.com/27985
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
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Chrome needs to support renegotiation at TLS 1.2 + HTTP/1.1, but we're
free to shed the handshake configuration at TLS 1.3 or HTTP/2.
Rather than making config shedding implicitly disable renegotiation,
make the actual shedding dependent on a combination of the two settings.
If config shedding is enabled, but so is renegotiation (including
whether we are a client, etc.), leave the config around. If the
renegotiation setting gets disabled again after the handshake,
re-evaluate and shed the config then.
Bug: 123
Change-Id: Ie833f413b3f15b8f0ede617991e3fef239d4a323
Reviewed-on: https://boringssl-review.googlesource.com/27904
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Matt Braithwaite <mab@google.com>
|SSL_CONFIG| is a container for bits of configuration that are
unneeded after the handshake completes. By default it is retained for
the life of the |SSL|, but it may be shed at the caller's option by
calling SSL_set_shed_handshake_config(). This is incompatible with
renegotiation, and with SSL_clear().
|SSL_CONFIG| is reachable by |ssl->config| and by |hs->config|. The
latter is always non-NULL. To avoid null checks, I've changed the
signature of a number of functions from |SSL*| arguments to
|SSL_HANDSHAKE*| arguments.
When configuration has been shed, setters that touch |SSL_CONFIG|
return an error value if that is possible. Setters that return |void|
do nothing.
Getters that request |SSL_CONFIG| values will fail with an |assert| if
the configuration has been shed. When asserts are compiled out, they
will return an error value.
The aim of this commit is to simplify analysis of split-handshakes by
making it obvious that some bits of state have no effects beyond the
handshake. It also cuts down on memory usage.
Of note: |SSL_CTX| is still reachable after the configuration has been
shed, and a couple things need to be retained only for the sake of
post-handshake hooks. Perhaps these can be fixed in time.
Change-Id: Idf09642e0518945b81a1e9fcd7331cc9cf7cc2d6
Bug: 123
Reviewed-on: https://boringssl-review.googlesource.com/27644
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: David Benjamin <davidben@google.com>
Chrome uses the platform certificate verifier and thus cannot reliably
expect PSS signatures to work in all configurations. Add an API for the
consumer to inform BoringSSL of this ability. We will then adjust our
advertisements accordingly.
Note that, because TLS 1.2 does not have the signature_algorithms_cert
extension, turning off TLS 1.3 and using this API will stop advertising
RSA-PSS. I believe this is the correct behavior given the semantics of
that code point.
The tests check the various combinations here, as well as checking that
the peer never sends signature_algorithms_cert identical to
signature_algorithms.
Bug: 229
Change-Id: I8c33a93efdc9252097e3899425b49548fc42a93a
Reviewed-on: https://boringssl-review.googlesource.com/27488
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Steven Valdez <svaldez@google.com>
These are connection state, so they should be reset on SSL_clear.
Change-Id: I861fe52578836615d2719c9e1ff0911c798f336e
Reviewed-on: https://boringssl-review.googlesource.com/27384
Commit-Queue: David Benjamin <davidben@google.com>
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This changes the contract for split handshakes such that on the
receiving side, the connection is to be driven until it returns
|SSL_ERROR_HANDBACK|, rather than until SSL_do_handshake() returns
success.
Change-Id: Idd1ebfbd943d88474d7c934f4c0ae757ff3c0f37
Reviewed-on: https://boringssl-review.googlesource.com/26864
Commit-Queue: Matt Braithwaite <mab@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
Checking |initial_handshake_complete| was a mistake—it's not true for
False Start connections at the time when Chrome wants to measure whether
PQ padding was used or not.
Change-Id: I51757e00f3e02129666ee1ce31c30d63f1bcbe74
Reviewed-on: https://boringssl-review.googlesource.com/26444
Commit-Queue: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
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On reflection, I think we'll need to note whether dummy PQ padding was
echoed on a given connection. Otherwise measurements in Chrome will be
mixed with cases where people have MITM proxies that ignored the
extension, or possibly Google frontends that haven't been updated.
Therefore this change will be used to filter latency measurements in
Chrome to only include those where the extension was echoed and we'll
measure at levels of 1 byte (for control), 400 bytes, and 1100 bytes.
This also makes it an error if the server didn't echo an extension of
the same length as was sent.
Change-Id: Ib2a0b29cfb8719a75a28f3cf96710c57d88eaa68
Reviewed-on: https://boringssl-review.googlesource.com/26284
Commit-Queue: Adam Langley <agl@google.com>
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Reviewed-by: David Benjamin <davidben@google.com>
SSLv3_method, SSLv3_client_method, and SSLv3_server_method produce
SSL_CTXs which fail every handshake. They appear no longer necessary for
compatibility, so remove them.
SSLv3 is still accessible to callers who explicitly re-enable SSLv3 on a
TLS_method, but that will be removed completely later this year.
Meanwhile, clear out a weird hack we had here.
Update-Note: I believe there are no more callers of these functions. Any
that were were already non-functional as these methods haven't been
unable to handshake for a while now.
Change-Id: I622f785b428ab0ceab77b5a9db05b2b0df28145a
Reviewed-on: https://boringssl-review.googlesource.com/26004
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
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Split handshakes allows the handshaking of a TLS connection to be
performed remotely. This encompasses not just the private-key and ticket
operations – support for that was already available – but also things
such as selecting the certificates and cipher suites.
The the comment block in ssl.h for details. This is highly experimental
and will change significantly before its settled.
Change-Id: I337bdfa4c3262169e9b79dd4e70b57f0d380fcad
Reviewed-on: https://boringssl-review.googlesource.com/25387
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
This adds support for sending the quic_transport_parameters
(draft-ietf-quic-tls) in ClientHello and EncryptedExtensions, as well as
reading the value sent by the peer.
Bug: boringssl:224
Change-Id: Ied633f557cb13ac87454d634f2bd81ab156f5399
Reviewed-on: https://boringssl-review.googlesource.com/24464
Commit-Queue: David Benjamin <davidben@google.com>
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Update-Note: Token Binding can no longer be configured with the custom
extensions API. Instead, use the new built-in implementation. (The
internal repository should be all set.)
Bug: 183
Change-Id: I007523a638dc99582ebd1d177c38619fa7e1ac38
Reviewed-on: https://boringssl-review.googlesource.com/20645
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Reviewed-by: David Benjamin <davidben@google.com>
This extension will be used to measure the latency impact of potentially
sending a post-quantum key share by default. At this time it's purely
measuring the impact of the client sending the key share, not the server
replying with a ciphertext.
We could use the existing padding extension for this but that extension
doesn't allow the server to echo it, so we would need a different
extension in the future anyway. Thus we just create one now.
We can assume that modern clients will be using TLS 1.3 by the time that
PQ key-exchange is established and thus the key share will be sent in
all ClientHello messages. However, since TLS 1.3 isn't quite here yet,
this extension is also sent for TLS 1.0–1.2 ClientHellos. The latency
impact should be the same either way.
Change-Id: Ie4a17551f6589b28505797e8c54cddbe3338dfe5
Reviewed-on: https://boringssl-review.googlesource.com/24585
Commit-Queue: Adam Langley <agl@google.com>
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Reviewed-by: David Benjamin <davidben@google.com>
TLS 1.3 includes a server-random-based anti-downgrade signal, as a
workaround for TLS 1.2's ServerKeyExchange signature failing to cover
the entire handshake. However, because TLS 1.3 draft versions are each
doomed to die, we cannot deploy it until the final RFC. (Suppose a
draft-TLS-1.3 client checked the signal and spoke to a final-TLS-1.3
server. The server would correctly negotiate TLS 1.2 and send the
signal. But the client would then break. An anologous situation exists
with reversed roles.)
However, it appears that Cisco devices have non-compliant TLS 1.2
implementations[1] and copy over another server's server-random when
acting as a TLS terminator (client and server back-to-back).
Hopefully they are the only ones doing this. Implement a
measurement-only version with a different value. This sentinel must not
be enforced, but it will tell us whether enforcing it will cause
problems.
[1] https://www.ietf.org/mail-archive/web/tls/current/msg25168.html
Bug: 226
Change-Id: I976880bdb2ef26f51592b2f6b3b97664342679c8
Reviewed-on: https://boringssl-review.googlesource.com/24284
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
This is connection state, not configuration, so it must live on
ssl->s3, otherwise SSL_clear will be confused.
Change-Id: Id7c87ced5248d3953e37946e2d0673d66bfedb08
Reviewed-on: https://boringssl-review.googlesource.com/24264
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
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We can probably do this globally at this point since the cipher
requirements are much more restrict than they were in the beginning.
(Firefox, in particular, has done so far a while.) For now add a flag
since some consumer wanted this.
I'll see about connecting it to a Chrome field trial after our breakage
budget is no longer reserved for TLS 1.3.
Change-Id: Ib61dd5aae2dfd48b56e79873a7f3061a7631a5f8
Reviewed-on: https://boringssl-review.googlesource.com/23725
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
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Change-Id: I46686aea9b68105cfe70a11db0e88052781e179c
Reviewed-on: https://boringssl-review.googlesource.com/22164
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Reviewed-by: Steven Valdez <svaldez@google.com>
RC4 is gone. The only remaining exception was the dumb SSL_eNULL cipher,
which works fine in DTLS. It doesn't seem worth the trouble to retain
this special-case.
Change-Id: I31023b71192808e4d21e82109255dc4d6d381df8
Reviewed-on: https://boringssl-review.googlesource.com/22467
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Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
This finally clears most of the SSL_clear special-cases.
Change-Id: I00fc240ccbf13f4290322845f585ca6f5786ad80
Reviewed-on: https://boringssl-review.googlesource.com/21947
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Steven Valdez <svaldez@google.com>
As with SSLTranscript before, we temporarily need some nastiness in
SSL3_STATE, but this is in preparation of giving SSL3_STATE a
constructor and destructor.
Change-Id: Ifc0ce34fdcd8691d521d8ea03ff5e83dad43b4a3
Reviewed-on: https://boringssl-review.googlesource.com/21944
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>
