This makes its purpose clearer. That the session cache is based on the
initial SSL_CTX is confusing (it's a remnant of OpenSSL's backwards
session resumption ordering), but we're probably stuck with it.
Relatedly, document SSL_set_SSL_CTX better.
Change-Id: I2832efc63f6c959c5424271b365825afc7eec5e4
Reviewed-on: https://boringssl-review.googlesource.com/14204
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
We'll measure this value to guide what tolerance to use in the 0-RTT
anti-replay mechanism. This also fixes a bug where we were previously
minting ticket_age_add-less tickets on the server. Add a check to reject
all those tickets.
BUG=113
Change-Id: I68e690c0794234234e0d0500b4b9a7f79aea641e
Reviewed-on: https://boringssl-review.googlesource.com/14068
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
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Due to middlebox and ecosystem intolerance, short record headers are going to
be unsustainable to deploy.
BUG=119
Change-Id: I20fee79dd85bff229eafc6aeb72e4f33cac96d82
Reviewed-on: https://boringssl-review.googlesource.com/14044
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This is the first part to fixing the SSL stack to be 2038-clean.
Internal structures and functions are switched to use OPENSSL_timeval
which, unlike timeval and long, are suitable for timestamps on all
platforms.
It is generally accepted that the year is now sometime after 1970, so
use uint64_t for the timestamps to avoid worrying about serializing
negative numbers in SSL_SESSION.
A follow-up change will fix SSL_CTX_set_current_time_cb to use
OPENSSL_timeval. This will require some coordinating with WebRTC.
DTLSv1_get_timeout is left alone for compatibility and because it stores
time remaining rather than an absolute time.
BUG=155
Change-Id: I1a5054813300874b6f29e348f9cd8ca80f6b9729
Reviewed-on: https://boringssl-review.googlesource.com/13944
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The two non-trivial changes are:
1. The public API now queries it out of the session. There is a long
comment over the old field explaining why the state was separate, but
this predates EMS being forbidden from changing across resumption. It
is not possible for established_session and the socket to disagree on
EMS.
2. Since SSL_HANDSHAKE gets reset on each handshake, the check that EMS
does not change on renego looks different. I've reworked that function a
bit, but it should have the same effect.
Change-Id: If72e5291f79681381cf4d8ceab267f76618b7c3d
Reviewed-on: https://boringssl-review.googlesource.com/13910
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This lets us trim another two pointers of per-connection state.
Change-Id: I2145d529bc25b7e24a921d01e82ee99f2c98867c
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Recent changes added SSL-level setters to these APIs. Unfortunately,
this has the side effect of breaking SSL_set_SSL_CTX, which is how SNI
is typically handled. SSL_set_SSL_CTX is kind of a weird function in
that it's very sensitive to which of the hodge-podge of config styles is
in use. I previously listed out all the config styles here, but it was
long and unhelpful. (I counted up to 7.)
Of the various SSL_set_SSL_CTX-visible config styles, the sanest seems
to be to move it to CERT. In this case, it's actually quite reasonable
since they're very certificate-related.
Later we may wish to think about whether we can cut down all 7 kinds of
config styles because this is kinda nuts. I'm wondering we should do
CERT => SSL_CONFIG, move everything there, and make that be the same
structure that is dropped post-handshake (supposing the caller has
disavowed SSL_clear and renego). Fruit for later thought. (Note though
that comes with a behavior change for all the existing config.)
Change-Id: I9aa47d8bd37bf2847869e0b577739d4d579ee4ae
Reviewed-on: https://boringssl-review.googlesource.com/13864
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
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|SSL_SESSION_from_bytes| now takes an |SSL_CTX*|, from which it uses the
|X509_METHOD| and buffer pool. This is our API so we can do this.
This also requires adding an |SSL_CTX*| argument to |SSL_SESSION_new|
for the same reason. However, |SSL_SESSION_new| already has very few
callers (and none in third-party code that I can see) so I think we can
get away with this.
Change-Id: I1337cd2bd8cff03d4b9405ea3146b3b59584aa72
Reviewed-on: https://boringssl-review.googlesource.com/13584
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Change-Id: I98903df561bbf8c5739f892d2ad5e89ac0eb8e6f
Reviewed-on: https://boringssl-review.googlesource.com/13369
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We already have some cases where the default is DECODE_ERROR and, rather
than have two defaults, just harmonise on that. (INTERNAL_ERROR might
make more sense in some cases, but we don't want to have to remember
what the default is in each case and nobody really cares what the actual
value is anyway.)
Change-Id: I28007898e8d6e7415219145eb9f43ea875028ab2
Reviewed-on: https://boringssl-review.googlesource.com/13720
Reviewed-by: Adam Langley <agl@google.com>
Right now the only way to set an SCT list is the per-context function
SSL_CTX_set_signed_cert_timestamp_list. However this assumes that all the
SSLs generated from a SSL_CTX share the same SCT list, which is wrong.
In order to avoid memory duplication in case SSL_CTX has its own list, a
CRYPTO_BUFFER is used for both SSL_CTX and SSL.
Change-Id: Id20e6f128c33cf3e5bff1be390645441be6518c6
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ssl_get_new_session would stash a copy of the configured hostname
into the SSL_SESSION on the server. Servers have no reason to
configuring that anyway, but, if one did, we'd leak when filling in
the client-supplied SNI later.
Remove this code and guard against this by remembering to OPENSSL_free
when overwriting that field (although it should always be NULL).
Reported-By: Robert Swiecki <swiecki@google.com>
Change-Id: Ib901b5f82e5cf818060ef47a9585363e05dd9932
Reviewed-on: https://boringssl-review.googlesource.com/13631
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This resolves a TODO, trims per-connection memory, and makes more sense.
These masks have nothing to do with certificate configuration.
Change-Id: I783e6158e51f58cce88e3e68dfa0ed965bdc894c
Reviewed-on: https://boringssl-review.googlesource.com/13368
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Change-Id: Ifc28887cbf91c7a80bdaf56e3bf80b2f8cfa7d53
Reviewed-on: https://boringssl-review.googlesource.com/13260
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
TLS 1.3 forbids warning alerts, and sending these is a bad idea. Per RFC
6066:
If the server understood the ClientHello extension but
does not recognize the server name, the server SHOULD take one of two
actions: either abort the handshake by sending a fatal-level
unrecognized_name(112) alert or continue the handshake. It is NOT
RECOMMENDED to send a warning-level unrecognized_name(112) alert,
because the client's behavior in response to warning-level alerts is
unpredictable.
The motivation is to cut down on the number of places where we send
non-closing alerts. We can't remove them yet (SSL 3.0 and TLS 1.3 draft
18 need to go), but eventually this can be a simplifying assumption.
Already this means DTLS never sends warning alerts, which is good
because DTLS can't retransmit them.
Change-Id: I577a1eb9c23e66d28235c0fbe913f00965e19486
Reviewed-on: https://boringssl-review.googlesource.com/13221
Reviewed-by: Adam Langley <agl@google.com>
This doesn't do anything useful. Every caller either never sets the
callback as a client or goes out of their way to filter out clients in
the callback.
Change-Id: I6f07d000a727f9ccba080f812e6b8e7a38e04350
Reviewed-on: https://boringssl-review.googlesource.com/13220
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These are no longer needed.
Change-Id: I909f7d690f57dafcdad6254948b5683757da69f4
Reviewed-on: https://boringssl-review.googlesource.com/13160
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Reviewed-by: Adam Langley <agl@google.com>
This extension will be used to test whether
https://github.com/tlswg/tls13-spec/pull/762 is deployable against
middleboxes. For simplicity, it is mutually exclusive with 0-RTT. If
client and server agree on the extension, TLS 1.3 records will use the
format in the PR rather than what is in draft 18.
BUG=119
Change-Id: I1372ddf7b328ddf73d496df54ac03a95ede961e1
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Most C standard library functions are undefined if passed NULL, even
when the corresponding length is zero. This gives them (and, in turn,
all functions which call them) surprising behavior on empty arrays.
Some compilers will miscompile code due to this rule. See also
https://www.imperialviolet.org/2016/06/26/nonnull.html
Add OPENSSL_memcpy, etc., wrappers which avoid this problem.
BUG=23
Change-Id: I95f42b23e92945af0e681264fffaf578e7f8465e
Reviewed-on: https://boringssl-review.googlesource.com/12928
Commit-Queue: David Benjamin <davidben@google.com>
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This dates to
62d05888d1
which intended to be removed in a later Android release once X25519 was
added. That has since happened.
This intentionally leaves the P-521 hooked up for now. Detaching it
completely is a more aggressive change (since it's slightly tied up with
SHA-512) that should wait until removing ECDSA+SHA512 has stuck in Chrome.
Change-Id: I04553c3eddf33a13b6e3e9a6e7ac4c4725676cb0
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The only accessor for this field is the group/curve ID. Switch to only
storing that so no cipher checks are needed to interpret it. Instead,
ignore older values at parse time.
Change-Id: Id0946d4ac9e7482c69e64cc368a9d0cddf328bd3
Reviewed-on: https://boringssl-review.googlesource.com/12693
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Right now the only way to set an OCSP response is SSL_CTX_set_ocsp_response
however this assumes that all the SSLs generated from a SSL_CTX share the
same OCSP response, which is wrong.
This is similar to the OpenSSL "function" SSL_get_tlsext_status_ocsp_resp,
the main difference being that this doesn't take ownership of the OCSP buffer.
In order to avoid memory duplication in case SSL_CTX has its own response,
a CRYPTO_BUFFER is used for both SSL_CTX and SSL.
Change-Id: I3a0697f82b805ac42a22be9b6bb596aa0b530025
Reviewed-on: https://boringssl-review.googlesource.com/12660
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size_t at the public API, uint8_t on the SSL structs since everything
fits in there comfortably.
Change-Id: I837c3b21e04e03dfb957c1a3e6770300d0b49c0b
Reviewed-on: https://boringssl-review.googlesource.com/12638
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There is no need to retain it beyond this point.
Change-Id: Ib5722ab30fc013380198b1582d1240f0fe0aa770
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Reviewed-by: Adam Langley <agl@google.com>
This was useful when we were transitioning NPN off in Chromium, but now
there are no callers remaining.
Change-Id: Ic619613d6d475eea6bc258c4a90148f129ea4a81
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It's our ClientHello representation. May as well name it accordingly.
Also switch away from calling the variable name ctx as that conflicts
with SSL_CTX.
Change-Id: Iec0e597af37137270339e9754c6e08116198899e
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The remaining direct accesses are in functions which expect to be called
in and out of the handshake. Accordingly, they are NULL-checked.
Change-Id: I07a7de6bdca7b6f8d09e22da11b8863ebf41389a
Reviewed-on: https://boringssl-review.googlesource.com/12343
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Change-Id: I84a8ff1d717f3291403f6fc49668c84f89b910da
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Change-Id: Id8543a88929091eb004a5205a30b483253cdaa25
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This takes care of many of the explicit ssl->s3->hs accesses.
Change-Id: I380fae959f3a7021d6de9d19a4ca451b9a0aefe5
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Although we ignore all but the first identity, keep clients honest by
parsing the whole thing. Also explicitly check that the binder and
identity counts match.
Change-Id: Ib9c4caae18398360f3b80f8db1b22d4549bd5746
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BUG=101
Change-Id: Ia1edbccee535b0bc3a0e18465286d5bcca240035
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Since the printed format for errors uses colons to separate different
parts of the error message, this was confusing.
Change-Id: I4742becec2bcb56ad8dc2fdb9a3bb23e4452d1b2
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Commit-Queue: Adam Langley <alangley@gmail.com>
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We do not change ALPN on renego, so the value should carry over and not
be cleared.
Change-Id: Id54a083945542b4457d9c2787f0fe7c30239b76f
Reviewed-on: https://boringssl-review.googlesource.com/12306
Reviewed-by: David Benjamin <davidben@google.com>
If the function fails, it's an internal_error.
Change-Id: I4b7cf7a6ca2527f04b708303ab1bc71df762b55b
Reviewed-on: https://boringssl-review.googlesource.com/12312
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It doesn't need to be exported out of t1_lib.c.
Change-Id: I000493e1e330457051da1719ca9f8152a4ff845a
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This simplifies a little code around EMS and PSK KE modes, but requires
tweaking the SNI code.
The extensions that are more tightly integrated with the handshake are
still processed inline for now. It does, however, require an extra state
in 1.2 so the asynchronous session callback does not cause extensions to
be processed twice. Tweak a test enforce this.
This and a follow-up to move cert_cb before resumption are done in
preparation for resolving the cipher suite before resumption and only
resuming on match.
Note this has caller-visible effects:
- The legacy SNI callback happens before resumption.
- The ALPN callback happens before resumption.
- Custom extension ClientHello parsing callbacks also cannot depend on
resumption state.
- The DoS protection callback now runs after all the extension callbacks
as it is documented to be called after the resumption decision.
BUG=116
Change-Id: I1281a3b61789b95c370314aaed4f04c1babbc65f
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The draft 18 implementation did not compute scts_requested correctly. As
a result, it always believed SCTs were requested. Fix this and add tests
for unsolicited OCSP responses and SCTs at all versions.
Thanks to Daniel Hirche for the report.
Change-Id: Ifc59c5c4d7edba5703fa485c6c7a4055b15954b4
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Having that logic in two different places is a nuisance when we go to
add new checks like resumption stuff. Along the way, this adds missing
tests for the ClientHello cipher/session consistency check. (We'll
eventually get it for free once the cipher/resumption change is
unblocked, but get this working in the meantime.)
This also fixes a bug where the session validity checks happened in the
wrong order relative to whether tickets_supported or renew_ticket was
looked at. Fix that by lifting that logic closer to the handshake.
Change-Id: I3f4b59cfe01064f9125277dc5834e62a36e64aae
Reviewed-on: https://boringssl-review.googlesource.com/12230
Reviewed-by: Adam Langley <agl@google.com>
It's all of one bit, but having it on the SSL object means we need
manually to reset it on renego.
Change-Id: I989dacd430fe0fa63d76451b95f036a942aefcfe
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HTTP/2 places requirements on the cipher suite. So that servers can
decline HTTP/2 when these requirements aren't met, defer ALPN
negotiation.
See also b/32553041.
Change-Id: Idbcf049f9c8bda06a8be52a0154fe76e84607268
Reviewed-on: https://boringssl-review.googlesource.com/11982
Reviewed-by: Adam Langley <agl@google.com>
Trim a few more bytes from the future QUIC ClientHello.
Change-Id: If23c5cd078889a9a26cf2231b51b17c2615a38ea
Reviewed-on: https://boringssl-review.googlesource.com/12000
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TLS 1.3 also uses this extension and doesn't use any EC-based suites.
Always offering the extension is simpler. Also this gets an
SSL_get_ciphers call out of the way (that function is somewhat messy in
semantics).
Change-Id: I2091cb1046e0aea85caa76e73f50e8416e6ed94c
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We currently preferentially sign the largest hash available and
advertise such a preference for signatures we accept. We're just as
happy with SHA-256 and, all else equal, a smaller hash would be epsilon
more performant. We also currently claim, in TLS 1.3, we prefer P-384
over P-256 which is off.
Instead order SHA-256 first, next the larger SHA-2 hashes, and leave
SHA-1 at the bottom. Within a hash, order ECDSA > RSA-PSS > RSA-PKCS1.
This has the added consequence that we will preferentially pair P-256
with SHA-256 in signatures we generate instead of larger hashes that get
truncated anyway.
Change-Id: If4aee068ba6829e8c0ef7948f56e67a5213e4c50
Reviewed-on: https://boringssl-review.googlesource.com/11821
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Change-Id: I0bd7fdd276e7461ef08b8055bf3d0387f756739f
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Channel ID for TLS 1.3 uses the same digest construction as
CertificateVerify. This message is signed with the Channel ID key and
put in the same handshake message (with the same format) as in TLS 1.2.
BUG=103
Change-Id: Ia5b2dffe5a39c39db0cecb0aa6bdc328e53accc2
Reviewed-on: https://boringssl-review.googlesource.com/11420
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
