For consistency and to avoid a pedantic GCC warning (even though it's
mostly old legacy code).
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In OpenSSL, they're used in the 32-bit x86 Blowfish, CAST, DES, and RC5
assembly bits. We don't have any of those.
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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.)
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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.
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The (rather long...) preamble to aead.h still said we allowed this.
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We need time.h for clock_gettime on Linux. Previously, scoped_types.h
was pulling in everything and getting it for us, but now it doesn't
exist. We seem to have been pulling it in on accident anyway but
it seems Android's system headers end up not doing so.
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I keep wishing we had that available and patching this in.
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(Imported from upstream's 2a20b6d9731488bcb500e58a434375f59fb9adcc)
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The compiler complains about:
error: explicit specialization of
'bssl::internal::Deleter<evp_pkey_st>' after instantiation
This is because, although the deleter's operator() is not instantiated
without emitting std::unique_ptr's destructor, the deleter itself *is*.
Deleters are allowed to have non-zero size, so a std::unique_ptr
actually embeds a copy of the deleter, so it needs the size of the
deleter.
As with all problems in computer science, we fix this with a layer of
indirection. Instead of specializing the deleter, we specialize
bssl::internal::DeleterImpl which, when specialized, has a static method
Free. That is only instantiated inside
bssl::internal::Deleter::operator(), giving us the desired properties.
(Did I mention forward decls are terrible? I wish people wouldn't want
them so much.)
Also appease clang-format.
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(Imported from upstream's a404656a8b40d9f1172e5e330f7e2d9d87cabab8)
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Not that this matters in the slightest, but the recent IETF mailing
reminded me we don't test this.
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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.
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It lacks std::unique_ptr, despite some consumers using it with C++11 in
the compiler enabled.
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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.
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It was switched to using the callbacks, but the callbacks require
SSL_SESS_CACHE_CLIENT be set.
(We should possibly just stop conditioning the callback on that bit
since it doesn't do anything.)
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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"'.
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Change-Id: Ieee80e5949e7f5cda77a643bae8fb1c521eb3587
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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.)
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The early callback needs to run before even version negotiation has been
resolved.
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These test vectors include the k value, so we can get a deterministic
test.
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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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This removes all but the generic C RC4 implementation. At this point we
want to optimize for size/simplicity rather than speed.
See also upstream's 3e9e810f2e047effb1056211794d2d12ec2b04e7 which
removed the RC4_CHUNK code and standardized on RC4_INDEX. A
since-removed comment says that it was implemented for "pre-21164a Alpha
CPUs don't have byte load/store instructions" and helps with SPARC and
MIPS.
This also removes all the manual loop unrolling.
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This and the following commits will import NIST's ECC test vectors.
Right now all our tests pass if I make P-224 act like P-521, which is
kind of embarrassing. (Other curves are actually tested, but only
because runner.go tests them against BoGo.)
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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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Somehow I didn't notice these used i2d_ASN1_bytes and
d2i_ASN1_type_bytes when removing those. Fortunately the macros are also
removable so drop them too.
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We may need to implement high tag number form someday. CBS_get_asn1 has
an unsigned output to allow for this, but CBB_add_asn1 takes a uint8_t
(I think this might be my fault). Fix that which also fixes a
-Wconversion warning.
Simply leaving room in tag representation will still cause troubles
because the class and constructed bits overlap with bits for tag numbers
above 31. Probably the cleanest option would be to shift them to the top
3 bits of a u32 and thus not quite match the DER representation. Then
CBS_get_asn1 and CBB_add_asn1 will internally munge that into the DER
representation and consumers may continue to write things like:
tag_number | CBS_ASN1_CONTEXT_SPECIFIC
I haven't done that here, but in preparation for that, document that
consumers need to use the values and should refrain from assuming the
correspond to DER.
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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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Some, very recent, versions of Clang now support `.arch`. Allow them to
see these directives with BORINGSSL_CLANG_SUPPORTS_DOT_ARCH.
BUG=39
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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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958aaf1ea1, imported from upstream, had an
off-by-one error. Reproducing the failure is fairly easy as it can't
even serialize 1. See also upstream's
099e2968ed3c7d256cda048995626664082b1b30.
Rewrite the function completely with CBB and add a basic test.
BUG=chromium:639740
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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.
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Apparently we forgot to do this.
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Chromium has switched to better APIs.
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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
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However, for now, we will only enable it if TLS 1.3 is offered.
BUG=85
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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.
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Commit-Queue: David Benjamin <davidben@google.com>
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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
Reviewed-on: https://boringssl-review.googlesource.com/10485
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
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
Reviewed-on: https://boringssl-review.googlesource.com/10442
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>
