Change-Id: I7e85a2677fe28a22103a975d517bbee900c44ac3
Reviewed-on: https://boringssl-review.googlesource.com/9050
Reviewed-by: David Benjamin <davidben@google.com>
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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
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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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Change-Id: Iccd86440bf8721098050fac220dc9bb80bbfc670
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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
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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
Reviewed-on: https://boringssl-review.googlesource.com/8871
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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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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
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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
Reviewed-on: https://boringssl-review.googlesource.com/8870
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
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Change-Id: Ibde837040d2332bc8570589ba5be9b32e774bfcf
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Change-Id: I55ab20c3add6e504522f3bb7e75aeed7daa0aad7
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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
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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
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We never had coverage for that codepath.

Change-Id: Iba1b0a3ddca743745773c663995acccda9fa6970
Reviewed-on: https://boringssl-review.googlesource.com/8827
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Change-Id: I0fdd6db9ea229d394b14c76b6ba55f6165a6a806
Reviewed-on: https://boringssl-review.googlesource.com/8826
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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
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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
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Change-Id: Iad572f44448141c5e2be49bf25b42719c625a97a
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This adds the machinery for doing TLS 1.3 1RTT.

Change-Id: I736921ffe9dc6f6e64a08a836df6bb166d20f504
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Change-Id: I1132103bd6c8b01c567b970694ed6b5e9248befb
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We already check for ciphers == NULL earlier in the function.

Change-Id: I0e676816d891e1d24cf45cab449c4d3915ec54ee
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Not only test that we can enforce the message type correctly (this is
currently in protocol-specific code though really should not be), but
also test that each individual message is checked correctly.

Change-Id: I5ed0f4033f011186f020ea46940160c7639f688b
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This will be used for writing the equivalent test in TLS 1.3 to the
recent DTLS change and similar.

Change-Id: I280c3ca8f1d8e0981b6e7a499acb7eceebe43a0c
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This is the equivalent of FragmentAcrossChangeCipherSuite for DTLS. It
is possible for us to, while receiving pre-CCS handshake messages, to
buffer up a message with sequence number meant for a post-CCS Finished.
When we then get to the new epoch and attempt to read the Finished, we
will process the buffered Finished although it was sent with the wrong
encryption.

Move ssl_set_{read,write}_state to SSL_PROTOCOL_METHOD hooks as this is
a property of the transport. Notably, read_state may fail. In DTLS
check the handshake buffer size. We could place this check in
read_change_cipher_spec, but TLS 1.3 has no ChangeCipherSpec message, so
we will need to implement this at the cipher change point anyway. (For
now, there is only an assert on the TLS side. This will be replaced with
a proper check in TLS 1.3.)

Change-Id: Ia52b0b81e7db53e9ed2d4f6d334a1cce13e93297
Reviewed-on: https://boringssl-review.googlesource.com/8790
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Keep our C implementation honest.

Change-Id: I9e9e686b7f730b61218362450971afdd82b0b640
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It tests the same thing right now with Fake TLS 1.3, but we'll need this
tested in real TLS 1.3.

Change-Id: Iacd32c2d4e56d341e5709a2ccd80fed5d556c94d
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This way we can test them at TLS 1.3 as well. The tests for extensions
which will not exist in TLS 1.3 are intentionally skipped, though the
commit which adds TLS 1.3 will want to add negative tests for them.

Change-Id: I41784298cae44eb6c27b13badae700ad02f9c721
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This is legal to enforce and we can keep our server honest.

Change-Id: I86ab796dcb51f88ab833fcf5b57aff40e14c7363
Reviewed-on: https://boringssl-review.googlesource.com/8789
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

This allows us to implement custom RSA-PSS-based keys, so the async TLS
1.3 tests can proceed. For now, both sign and sign_digest exist, so
downstreams only need to manage a small change atomically. We'll remove
sign_digest separately.

In doing so, fold all the *_complete hooks into a single complete hook
as no one who implemented two operations ever used different function
pointers for them.

While I'm here, I've bumped BORINGSSL_API_VERSION. I do not believe we
have any SSL_PRIVATE_KEY_METHOD versions who cannot update atomically,
but save a round-trip in case we do. It's free.

Change-Id: I7f031aabfb3343805deee429b9e244aed5d76aed
Reviewed-on: https://boringssl-review.googlesource.com/8786
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>

This makes custom private keys and EVP_PKEYs symmetric again. There is
no longer a requirement that the caller pre-filter the configured
signing prefs.

Also switch EVP_PKEY_RSA to NID_rsaEncryption. These are identical, but
if some key types are to be NIDs, we should make them all NIDs.

Change-Id: I82ea41c27a3c57f4c4401ffe1ccad406783e4c64
Reviewed-on: https://boringssl-review.googlesource.com/8785
Reviewed-by: David Benjamin <davidben@google.com>

This gives us a sigalg-based API for configuring signing algorithms.

Change-Id: Ib746a56ebd1061eadd2620cdb140d5171b59bc02
Reviewed-on: https://boringssl-review.googlesource.com/8784
Reviewed-by: Adam Langley <agl@google.com>