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
Reviewed-on: https://boringssl-review.googlesource.com/9090
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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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TLS 1.3 requires callers use the callback rather than SSL_get_session.
Change-Id: I2caae70e641b102ce93256c847c178871bf78bac
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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
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|BN_mod_exp_mont| uses |BN_nnmod| so it seems like
|BN_mod_exp_mont_consttime| should too. Further, I created
these test vectors by doing the math by hand, and the tests
passed for |BN_mod_exp_mont| but failed for
|BN_mod_exp_mont_consttime| without this change.
Change-Id: I7cffa1375e94dd8eaee87ada78285cd67fff1bac
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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
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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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The functions appear to try to handle negative inputs, but it isn't
clear how negative inputs are supposed to work and/or if these
functions work the way they are supposed to given negative inputs.
There seems to be no legitimate reason to pass these functions negative
inputs, so just document that negative inputs shouldn't be used. More
specifically, document that the inputs should be in the range [0, n)
where |n| is the Montgomery modulus.
Change-Id: Id8732fb89616f10e673704e6fa09d78926c402d8
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Have |bn_correct_top| fix |bn->neg| if the input is zero so that we
don't have negative zeros lying around.
Thanks to Brian Smith for noticing.
Change-Id: I91bcadebc8e353bb29c81c4367e85853886c8e4e
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BUG=59
Change-Id: If3a788ec1328226d69293996845fa1d14690bf40
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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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If two CRLs are equivalent then use the one with a later lastUpdate field:
this will result in the newest CRL available being used.
(Imported from upstream's 325da8231c8d441e6bb7f15d1a5a23ff63c842e5 and
3dc160e9be6dcaeec9345fbb61b1c427d7026103.)
Change-Id: I8c722663b979dfe08728d091697d8b8204dc265c
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Negative zeros are nuts, but it will probably be a while before we've
fixed everything that can create them. Fix both to consistently print
'-0' rather than '0' so failures are easier to diagnose (BN_cmp believes
the values are different.)
Change-Id: Ic38d90601b43f66219d8f44ca085432106cf98e3
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Simplify the calculation of the Montgomery constants in
|BN_MONT_CTX_set|, making the inversion constant-time. It should also
be faster by avoiding any use of the |BIGNUM| API in favor of using
only 64-bit arithmetic.
Now it's obvious how it works. /s
Change-Id: I59a1e1c3631f426fbeabd0c752e0de44bcb5fd75
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A caller using EVP_Digest* which a priori knows tighter bounds on the
hash function used (perhaps because it is always a particular hash) can
assume the function will not write more bytes than the size of the hash.
The letter of the rules before vaguely[*] allowed for more than
EVP_MD_MAX_SIZE bytes written which made for some unreasonable code in
Chromium. Officially clarify this and add tests which, when paired with
valgrind and ASan prove it.
BUG=59
[*] Not really. I think it already promised the output length will be
both the number of bytes written and the size of the hash and the size
of the hash is given by what the function promises to compute. Meh.
Change-Id: I736d526e81cca30475c90897bca896293ff30278
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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
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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
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As of a recent change, test_support always included the headers, which
causes Android's new build-system to be unhappy. It doesn't want to
include headers. Split them into test_support_headers and test_support
to match the other keys.
Then fix up references:
- Android's new build system only wants the sources. Fix this.
- Chromium's GN and GYP theoretically want the sources and headers, but
we've never supplied the headers because this isn't enforced at all.
Fix this. Headers are selected based on what target the header
"belongs to".
- Bazel has no change except to sort test_support_sources.
Change-Id: I85809e70a71236b5e91d87f87bb73bc2ea289251
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It seems much safer for the default value of |verify_result| to be an
error value.
Change-Id: I372ec19c41d77516ed12d0169969994f7d23ed70
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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
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BUG=74
Change-Id: I72d52c1fbc3413e940dddbc0b20c7f22459da693
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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
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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
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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
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Yo dawg I herd you like blinding so I put inversion blinding in your
RSA blinding so you can randomly mask your random mask.
This improves upon the current situation where we pretend that
|BN_mod_inverse_no_branch| is constant-time, and it avoids the need to
exert a lot of effort to make a actually-constant-time modular
inversion function just for RSA blinding.
Note that if the random number generator weren't working correctly then
the blinding of the inversion wouldn't be very effective, but in that
case the RSA blinding itself would probably be completely busted, so
we're not really losing anything by relying on blinding to blind the
blinding.
Change-Id: I771100f0ad8ed3c24e80dd859ec22463ef2a194f
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Change-Id: I7e85a2677fe28a22103a975d517bbee900c44ac3
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This also adds a missing OPENSSL_EXPORT.
Change-Id: I6c2400246280f68f51157e959438644976b1171b
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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
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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
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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
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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
Reviewed-on: https://boringssl-review.googlesource.com/8985
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
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
Reviewed-on: https://boringssl-review.googlesource.com/9020
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>
Change-Id: I6d552d26b3d72f6fffdc4d4d9fc3b5d82fb4e8bb
Reviewed-on: https://boringssl-review.googlesource.com/9010
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 API needs to be improved but, for the time being, keep the
invariant reasonable.
Change-Id: If94d41e7e7936e44de5ecb36da45f89f80df7784
Reviewed-on: https://boringssl-review.googlesource.com/8984
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
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>
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>
