Commit Graph

493 Commits

Author SHA1 Message Date
Adam Langley
6effbf24bc Add EVP_CIPHER support for Blowfish and CAST to decrepit.
Postgres contains a “pqcrypto” module that showcases the worst of 90's
crypto, including Blowfish and CAST5 in CFB, CBC, and ECB modes. (Also,
64-bit keys for both of those.)

In order to minimise the patching needed to build Postgres, put these
things in decrepit.

Change-Id: I8390c5153dd7227eef07293a4363878d79df8b21
Reviewed-on: https://boringssl-review.googlesource.com/c/34044
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2019-01-03 21:34:46 +00:00
David Benjamin
f77c8a38be Be less clever with CHECK_ABI.
Unwind testing will make CHECK_ABI much slower. The original
ptrace-based design is some 10,000x slower. I've found an alternate
design that's a mere 1,000x slower, but this probably warrants being
more straightforward. It also removes the weirdness where NDEBUG
controlled which tests were run.

While it does mean we need to write some extra tests for p256-x86_64.pl,
we otherwise do not directly unit test our assembly anyway. Usually we
test the public crypto APIs themselves. So, for most files, this isn't
actually extra work.

Bug: 181
Change-Id: I7cbb7f930c2ea6ae32a201da503dcd36844704f0
Reviewed-on: https://boringssl-review.googlesource.com/c/33965
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2019-01-03 21:02:24 +00:00
Adam Langley
e6bf9065af Remove pooling of PRNG state.
Prior to 82639e6f we used thread-local data for the PRNG state. That
change switched to using a mutex-protected pool instead in order to save
memory in heavily-threaded applications.

However, the pool mutex can get extremely hot in cases where the PRNG is
heavily used. 8e8f2504 was a short-term work around, but supporting both
modes is overly complex.

This change moves back to the state of the prior to 82639e6f. The best
way to review this is to diff the changed files against '82639e6f^' and
note that the only difference is a comment added in rand.c:
https://paste.googleplex.com/4997991748337664

Change-Id: I8febce089696fa6bc39f94f4a1e268127a8f78db
Reviewed-on: https://boringssl-review.googlesource.com/c/34024
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
2019-01-03 20:19:44 +00:00
Jeremy Apthorp
7177c1d29f Add EC_KEY_key2buf for OpenSSL compatibility
Change-Id: If45ef3a9bb757bd0c7f592f40ececaf4aa2f607d
Reviewed-on: https://boringssl-review.googlesource.com/c/33824
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2019-01-03 16:32:21 +00:00
Jeremy Apthorp
79c7ec06f6 Add EC_GROUP_order_bits for OpenSSL compatibility
Change-Id: I37149fa4274357d84befff85728ce2337131afa7
Reviewed-on: https://boringssl-review.googlesource.com/c/33804
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2019-01-02 23:51:14 +00:00
David Benjamin
0eaf783fbf Annotate leaf functions with .cfi_{startproc,endproc}
While gdb can figure it out, libunwind requires CFI directives to
unwind a leaf function, even though the directives are trivial.
Adding them matches what GCC outputs, and likely gdb has many
heuristics that less complex tools (e.g. profilers) may not.

Bug: 181
Change-Id: I25c72152de33109a29710a828aeb99c608dd0470
Reviewed-on: https://boringssl-review.googlesource.com/c/33964
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2019-01-02 23:49:24 +00:00
David Benjamin
c2e8d016f5 Fix beeu_mod_inverse_vartime CFI annotations and preamble.
This was also caught by the in-progress unwind tester. There are two
issues here.  First, .cfi_endproc must come after ret to fully cover the
function.  More importantly, this function is confused about whether it
has a frame pointer or not.

It looks like it does (movq %rsp, %rbp), and annotates accordingly, but
it does not actually use the frame pointer. It cannot. $y4 is rbp and
gets clobbered immediately after the preamble!

Remove this instruction and align the CFI annotations with a
frame-pointer-less function.

Bug: 181
Change-Id: I47b5f9798b3bcee1748e537b21c173d312a14b42
Reviewed-on: https://boringssl-review.googlesource.com/c/33947
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2019-01-02 23:47:34 +00:00
David Benjamin
a306b1b908 Fix CFI annotations in p256-x86_64-asm.pl.
This was caught by in-progress work to test unwind information. It was
incorrect at two instructions: immediately before we jump to
.Lpoint_double_shortcut$x. This is needed because
ecp_nistz256_point_add$x tries to be clever about not unwinding the
stack frame in its tail call.

It's also unlikely that the SEH handlers in this file are correct at
this point, but that will be handled separately while overhauling
everything else here. (For Win64, probably the only ABI-compliant option
is to just properly unwind the stack frame. Without a custom handler,
Win64 unwind codes are very restrictive.)

Bug: 181
Change-Id: I9f576d868850312d6c14d1386f8fbfa85021b347
Reviewed-on: https://boringssl-review.googlesource.com/c/33946
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2019-01-02 23:39:21 +00:00
David Benjamin
6ef1b64558 Add a comment about ecp_nistz256_point_add_affine's limitations.
ecp_nistz256_point_add_affine does not support the doubling case and,
unlike ecp_nistz256_point_add which does a tail call, computes the wrong
answer. Note TestPointAdd in the unit tests skips this case.

This works fine because we only use ecp_nistz256_point_add_affine for
the g_scalar term, which is fully computed before the p_scalar term.
(Additionally it requires that the windowing pattern never hit the
doubling case for single multiplication.)

But this is not obvious from reading the multiplication functions, so
leave a comment at the call site to point this out.

Change-Id: I08882466d98030cdc882a5be9e702ee404e80cce
Reviewed-on: https://boringssl-review.googlesource.com/c/33945
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2019-01-02 23:33:31 +00:00
David Benjamin
1c55e54eda Refresh p256-x86_64_tests.txt.
The old points weren't even on the curve. I probably had no clue what I
was doing at the time when I generated them. Refresh them with a
checked-in generate script.

Change-Id: Ib4613fe922edcf45fc4ea49fc4c2cc23a9a2a9bd
Reviewed-on: https://boringssl-review.googlesource.com/c/33944
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2019-01-02 23:29:31 +00:00
Adam Langley
8e8f250422 Use thread-local storage for PRNG states if fork-unsafe buffering is enabled.
We switched from thread-local storage to a mutex-pool in 82639e6f53
because, for highly-threaded processes, the memory used by all the
states could be quite large. I had judged that a mutex-pool should be
fine, but had underestimated the PRNG requirements of some of our jobs.

This change makes rand.c support using either thread-locals or a
mutex-pool. Thread-locals are used if fork-unsafe buffering is enabled.
While not strictly related to fork-safety, we already have the
fork-unsafe control, and it's already set by jobs that care a lot about
PRNG performance, so fits quite nicely here.

Change-Id: Iaf1e0171c70d4c8dbe1e42283ea13df5b613cb2d
Reviewed-on: https://boringssl-review.googlesource.com/c/31564
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
2018-12-28 18:05:18 +00:00
David Benjamin
54efa1afc0 Add an ABI testing framework.
Dear reader, I must apologize in advance. This CL contains the following:

- A new 256-line perlasm file with non-trivial perl bits and a dual-ABI
  variadic function caller.

- C preprocessor gymnastics, with variadic macros and fun facts about
  __VA_ARGS__'s behavior on empty argument lists.

- C++ template gymnastics, including variadic arguments, template
  specialization, std::enable_if, and machinery to control template argument
  deduction.

Enjoy.

This tests that our assembly functions correctly honor platform ABI
conventions. Right now this only tests callee-saved registers, but it should be
extendable to SEH/CFI unwind testing with single-step debugging APIs.
Register-checking does not involve anything funny and should be compatible with
SDE. (The future unwind testing is unlikely to be compatible.)

This CL adds support for x86_64 SysV and Win64 ABIs. ARM, AArch64, and x86 can
be added in the future. The testing is injected in two places. First, all the
assembly tests in p256-x86_64-test.cc are now instrumented. This is the
intended workflow and should capture all registers.

However, we currently do not unit-test our assembly much directly. We should do
that as follow-up work[0] but, in the meantime, I've also wrapped all of the GTest
main function in an ABI test. This is imperfect as ABI failures may be masked
by other stack frames, but it costs nothing[1] and is pretty reliable at
catching Win64 xmm register failures.

[0] An alternate strategy would be, in debug builds, unconditionally instrument
every assembly call in libcrypto. But the CHECK_ABI macro would be difficult to
replicate in pure C, and unwind testing may be too invasive for this. Still,
something to consider when we C++ libcrypto.

[1] When single-stepped unwind testing exists, it won't cost nothing. The
gtest_main.cc call will turn unwind testing off.

Change-Id: I6643b26445891fd46abfacac52bc024024c8d7f6
Reviewed-on: https://boringssl-review.googlesource.com/c/33764
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <alangley@gmail.com>
Commit-Queue: David Benjamin <davidben@google.com>
2018-12-21 16:09:32 +00:00
Adam Langley
a6a049a6fb Add start of infrastructure for checking constant-time properties.
Valgrind's checking of uninitialised memory behaves very much like a
check for constant-time code: branches and memory indexes based on
uninitialised memory trigger warnings. Therefore, if we can tell
Valgrind that some secret is “uninitialised”, it'll give us a warning if
we do something non-constant-time with it.

This was the idea behind https://github.com/agl/ctgrind. But tricks like
that are no longer needed because Valgrind now comes with support for
marking regions of memory as defined or not. Therefore we can use that
API to check constant-time code.

This CL defines |CONSTTIME_SECRET| and |CONSTTIME_DECLASSIFY|, which are
no-ops unless the code is built with
|BORINGSSL_CONSTANT_TIME_VALIDATION| defined, which it isn't by default.
So this CL is a no-op itself so far. But it does show that a couple of
bits of constant-time time are, in fact, constant-time—seemingly even
when compiled with optimisations, which is nice.

The annotations in the RSA code are a) probably not marking all the
secrets as secret, and b) triggers warnings that are a little
interesting:

The anti-glitch check calls |BN_mod_exp_mont| which checks that the
input is less than the modulus. Of course, it is because the input is
the RSA plaintext that we just decrypted, but the plaintext is supposed
to be secret and so branching based on its contents isn't allows by
Valgrind. The answer isn't totally clear, but I've run out of time on
this for now.

Change-Id: I1608ed0b22d201e97595fafe46127159e02d5b1b
Reviewed-on: https://boringssl-review.googlesource.com/c/33504
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2018-12-18 22:43:02 +00:00
David Benjamin
3adb1e5a37 Patch out the XTS implementation in bsaes.
We don't call it, so ship less code and reduce the number of places
where we must think about the bsaes -> aes_nohw fallback.

Bug: 256
Change-Id: I10ac2d70e18ec81e679631a9532c36d9edab1c6e
Reviewed-on: https://boringssl-review.googlesource.com/c/33586
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2018-12-12 22:27:13 +00:00
Adam Langley
bf5021a6b8 Eliminate |OPENSSL_ia32cap_P| in C code in the FIPS module.
This can break delocate with certain compiler settings.

Change-Id: I76cf0f780d0e967390feed754e39b0ab25068f42
Reviewed-on: https://boringssl-review.googlesource.com/c/33485
Commit-Queue: Adam Langley <alangley@gmail.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
2018-12-06 00:58:14 +00:00
Brian Smith
90247be1d9 Remove XOP code from sha512-x86_64.pl.
Other XOP code was removed already.

Change-Id: I0c457effebd22f89e722653b93905a0b2e3eb5c0
Reviewed-on: https://boringssl-review.googlesource.com/c/33424
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2018-12-04 01:10:32 +00:00
Brian Smith
0f5ecd3a85 Re-enable AES-NI on 32-bit x86 too.
commit 05750f23ae disabled AES-NI for
32-bit x86, perhaps unintentionally.

Change-Id: Ie950c4f49526257138ecc803df5ecfc115bc648d
Reviewed-on: https://boringssl-review.googlesource.com/c/33365
Reviewed-by: Adam Langley <agl@google.com>
2018-11-28 00:32:30 +00:00
David Benjamin
293d9ee4e8 Support execute-only memory for AArch64 assembly.
Put data in .rodata and, rather than adr, use the combination of adrp :pg_hi21:
and add :lo12:. Unfortunately, iOS uses different syntax, so we must add more
transforms to arm-xlate.pl.

Tested manually by:

1. Use Android NDK r19-beta1

2. Follow usual instructions to configure CMake for aarch64, but pass
   -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld -Wl,-execute-only".

3. Build. Confirm with readelf -l tool/bssl that .text is not marked
   readable.

4. Push the test binaries onto a Pixel 3. Test normally and with
   --cpu={none,neon,crypto}. I had to pass --gtest_filter=-*Thread* to
   crypto_test. There appears to be an issue with some runtime function
   that's unrelated to our assembly.

No measurable performance difference.

Going forward, to support this, we will need to apply similar changes to
all other AArch64 assembly. This is relatively straightforward, but may
be a little finicky for dual-AArch32/AArch64 files (aesv8-armx.pl).

Update-Note: Assembly syntax is a mess. There's a decent chance some
assembler will get offend.

Change-Id: Ib59b921d4cce76584320fefd23e6bb7ebd4847eb
Reviewed-on: https://boringssl-review.googlesource.com/c/33245
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2018-11-19 19:58:15 +00:00
David Benjamin
4188c3f495 Remove cacheline striping in copy_from_prebuf.
The standard computation model for constant-time code is that memory
access patterns must be independent of secret data.
BN_mod_exp_mont_consttime was previously written to a slightly weaker
model: only cacheline access patterns must be independent of secret
data. It assumed accesses within a cacheline were indistinguishable.

The CacheBleed attack (https://eprint.iacr.org/2016/224.pdf) showed this
assumption was false. Cache lines may be divided into cache banks, and
the researchers were able to measure cache bank contention pre-Haswell.
For Haswell, the researchers note "But, as Haswell does show timing
variations that depend on low address bits [19], it may be vulnerable to
similar attacks."

OpenSSL's fix to CacheBleed was not to adopt the standard constant-time
computation model. Rather, it now assumes accesses within a 16-byte
cache bank are indistinguishable, at least in the C copy_from_prebuf
path. These weaker models failed before with CacheBleed, so avoiding
such assumptions seems prudent. (The [19] citation above notes a false
dependence between memory addresses with a distance of 4k, which may be
what the paper was referring to.) Moreover, the C path is largely unused
on x86_64 (which uses mont5 asm), so it is especially questionable for
the generic C code to make assumptions based on x86_64.

Just walk the entire table in the C implementation. Doing so as-is comes
with a performance hit, but the striped memory layout is, at that point,
useless. We regain the performance loss (and then some) by using a more
natural layout. Benchmarks below.

This CL does not touch the mont5 assembly; I haven't figured out what
it's doing yet.

Pixel 3, aarch64:
Before:
Did 3146 RSA 2048 signing operations in 10009070us (314.3 ops/sec)
Did 447 RSA 4096 signing operations in 10026666us (44.6 ops/sec)
After:
Did 3210 RSA 2048 signing operations in 10010712us (320.7 ops/sec)
Did 456 RSA 4096 signing operations in 10063543us (45.3 ops/sec)

Pixel 3, armv7:
Before:
Did 2688 RSA 2048 signing operations in 10002266us (268.7 ops/sec)
Did 459 RSA 4096 signing operations in 10004785us (45.9 ops/sec)
After:
Did 2709 RSA 2048 signing operations in 10001299us (270.9 ops/sec)
Did 459 RSA 4096 signing operations in 10063737us (45.6 ops/sec)

x86_64 Broadwell, mont5 assembly disabled:
(This configuration is not actually shipped anywhere, but seemed a
useful data point.)
Before:
Did 14274 RSA 2048 signing operations in 10009130us (1426.1 ops/sec)
Did 2448 RSA 4096 signing operations in 10046921us (243.7 ops/sec)
After:
Did 14706 RSA 2048 signing operations in 10037908us (1465.0 ops/sec)
Did 2538 RSA 4096 signing operations in 10059986us (252.3 ops/sec)

Change-Id: If41da911d4281433856a86c6c8eadf99cd33e2d8
Reviewed-on: https://boringssl-review.googlesource.com/c/33268
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2018-11-19 19:10:09 +00:00
David Benjamin
5963bff237 Tidy up type signature of BN_mod_exp_mont_consttime table.
It's a table of BN_ULONGs. No particular need to use unsigned char.

Change-Id: I397883cef9f39fb162c2b0bfbd6a70fe399757a2
Reviewed-on: https://boringssl-review.googlesource.com/c/33267
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2018-11-19 17:44:44 +00:00
Adam Langley
444c2e59fb Merge P-224 contract into serialisation.
Contraction was always and only done immediately prior to calling
|p224_felem_to_generic| so merge it into that function.

Change-Id: If4fb46c6305ba724dfff15e8362a094c599f3f2c
Reviewed-on: https://boringssl-review.googlesource.com/c/33165
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: David Benjamin <davidben@google.com>
2018-11-14 23:47:13 +00:00
Adam Langley
549b9024d4 Contract P-224 elements before returning them.
cfd50c63 switched to using the add/dbl of p224_64.c, but the outputs
weren't contracted before being returned and could be out of range,
giving invalid results.

Change-Id: I3cc295c7ddbff43375770dbafe73b37a668e4e6b
Reviewed-on: https://boringssl-review.googlesource.com/c/33184
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2018-11-14 22:38:12 +00:00
David Benjamin
ce45588695 Speculatively remove __STDC_*_MACROS.
C99 added macros such as PRIu64 to inttypes.h, but it said to exclude them from
C++ unless __STDC_FORMAT_MACROS or __STDC_CONSTANT_MACROS was defined. This
text was never incorporated into any C++ standard and explicitly overruled in
C++11.

Some libc headers followed C99. Notably, glibc prior to 2.18
(https://sourceware.org/bugzilla/show_bug.cgi?id=15366) and old versions of the
Android NDK.

In the NDK, although it was fixed some time ago (API level 20), the NDK used to
use separate headers per API level. Only applications using minSdkVersion >= 20
would get the fix. Starting NDK r14, "unified" headers are available which,
among other things, make the fix available (opt-in) independent of
minSdkVersion. In r15, unified headers are opt-out, and in r16 they are
mandatory.

Try removing these and see if anyone notices. The former is past our five year
watermark. The latter is not and Android has hit
https://boringssl-review.googlesource.com/c/boringssl/+/32686 before, but
unless it is really widespread, it's probably simpler to ask consumers to
define __STDC_CONSTANT_MACROS and __STDC_FORMAT_MACROS globally.

Update-Note: If you see compile failures relating to PRIu64, UINT64_MAX, and
friends, update your glibc or NDK. As a short-term fix, add
__STDC_CONSTANT_MACROS and __STDC_FORMAT_MACROS to your build, but get in touch
so we have a sense of how widespread it is.

Bug: 198
Change-Id: I56cca5f9acdff803de1748254bc45096e4c959c2
Reviewed-on: https://boringssl-review.googlesource.com/c/33146
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>
2018-11-14 16:14:37 +00:00
David Benjamin
5ecfb10d54 Modernize OPENSSL_COMPILE_ASSERT, part 2.
The change seems to have stuck, so bring us closer to C/++11 static asserts.

(If we later find we need to support worse toolchains, we can always use
__LINE__ or __COUNTER__ to avoid duplicate typedef names and just punt on
embedding the message into the type name.)

Change-Id: I0e5bb1106405066f07740728e19ebe13cae3e0ee
Reviewed-on: https://boringssl-review.googlesource.com/c/33145
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2018-11-14 16:06:37 +00:00
Adam Langley
9a547e17eb Mark the |e| argument to |RSA_generate_key_ex| as const.
The function does not take ownership of |e| and this makes that clear.

Change-Id: I53bb5fa94bec5d16d1c904b59391d36df7abbde6
Reviewed-on: https://boringssl-review.googlesource.com/c/33164
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>
2018-11-14 15:57:25 +00:00
David Benjamin
5279ef5769 Clean up EC_POINT to byte conversions.
With the allocations and BN_CTX gone, ECDH and point2oct are much, much
shorter.

Bug: 242
Change-Id: I3421822e94100f7eb2f5f2373df7fb3b3311365e
Reviewed-on: https://boringssl-review.googlesource.com/c/33071
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
2018-11-13 17:27:59 +00:00
Adam Langley
c93ab63a53 Need cpu.h for |OPENSSL_ia32cap_P|.
(Otherwise the individual-file build breaks.)

Change-Id: Id3defd08cd2b49af1d8eb6890bd8454332c1aa1e
Reviewed-on: https://boringssl-review.googlesource.com/c/33124
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>
2018-11-13 17:15:39 +00:00
David Benjamin
c1c81613ce Rename EC_MAX_SCALAR_*.
These are used for field elements too.

Change-Id: I74e3dbcafdce34ad507f64a0718e0420b56b51ae
Reviewed-on: https://boringssl-review.googlesource.com/c/33070
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
2018-11-13 03:22:04 +00:00
David Benjamin
9f152adfcf Use EC_RAW_POINT in ECDSA.
Now the only allocations in ECDSA are the ECDSA_SIG input and output.

Change-Id: If1fcde6dc2ee2c53f5adc16a7f692e22e9c238de
Reviewed-on: https://boringssl-review.googlesource.com/c/33069
Commit-Queue: David Benjamin <davidben@google.com>
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2018-11-13 02:06:46 +00:00
David Benjamin
8618f2bfe0 Optimize EC_GFp_mont_method's cmp_x_coordinate.
For simplicity, punt order > field or width mismatches. Analogous
optimizations are possible, but the generic path works fine and no
commonly-used curve looks hits those cases.

Before:
Did 5888 ECDSA P-384 verify operations in 3094535us (1902.7 ops/sec)
After [+6.7%]:
Did 6107 ECDSA P-384 verify operations in 3007515us (2030.6 ops/sec)

Also we can fill in p - order generically and avoid extra copies of some
constants.

Change-Id: I38e1b6d51b28ed4f8cb74697b00a4f0fbc5efc3c
Reviewed-on: https://boringssl-review.googlesource.com/c/33068
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2018-11-13 01:48:21 +00:00
David Benjamin
76e441bd66 Remove some easy BN_CTXs.
Change-Id: Ie7ff03a2c5b2ae8f56816b02182df40ce7ca0065
Reviewed-on: https://boringssl-review.googlesource.com/c/33066
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2018-11-12 22:04:40 +00:00
David Benjamin
be11d6d8d7 Push BIGNUM out of the cmp_x_coordinate interface.
This removes the failure cases for cmp_x_coordinate, this clearing our
earlier dilemma.

Change-Id: I057f705e49b0fb5c3fc9616ee8962a3024097b24
Reviewed-on: https://boringssl-review.googlesource.com/c/33065
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2018-11-12 21:46:36 +00:00
David Benjamin
fa3aadcd40 Push BIGNUM out of EC_METHOD's affine coordinates hook.
This is in preparation for removing the BIGNUM from cmp_x_coordinate.

Change-Id: Id8394248e3019a4897c238289f039f436a13679d
Reviewed-on: https://boringssl-review.googlesource.com/c/33064
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2018-11-12 21:32:53 +00:00
David Benjamin
adeb72b353 Fix r = p-n+epsilon ECDSA tests.
I forgot to refresh the public key in those tests, so they weren't
actually testing what they were supposed to. With this fix, injecting
too larger of a P_MINUS_ORDER into p256-x86_64.c now breaks tests.

Change-Id: I5d10a85c84b09629448beef67c86de607525fc71
Reviewed-on: https://boringssl-review.googlesource.com/c/33044
Reviewed-by: Adam Langley <agl@google.com>
2018-11-12 16:34:45 +00:00
David Benjamin
4706ea728e Inline ec_GFp_simple_group_get_degree.
This function is not EC_METHOD-specific, nor is there any reason it
would be (we do not support GF2m).

Change-Id: I4896cd16a107ad6a99be445a0dc0896293e8c8f9
Reviewed-on: https://boringssl-review.googlesource.com/c/32884
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2018-11-08 23:56:02 +00:00
David Benjamin
fbec517255 Better test boundary cases of ec_cmp_x_coordinate.
This is done in preparation of generalizing the optimization to all our
EC_METHODs.

Wycheproof happily does cover the case where x needed a reduction, but
they don't appear to check x being just above or below n, only x = p - 1
(adjusted downwards). Also we can tailor the test vectors a bit to the
x == r*z^2 (mod p) strategy to make sure we don't mess that up.

Additionally, the scenario is different for n > p. There is also the
nuisance of EC_FELEM vs EC_SCALAR having different widths. All our
built-in curves are well-behaved (same width, and consistently p < n),
but secp160r1 is reachable from custom curves and violates both
properties. Generate some tests to cover it as well.

Change-Id: Iefa5ebfe689a81870be21f04f5962ab161d38dab
Reviewed-on: https://boringssl-review.googlesource.com/c/32985
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2018-11-08 23:52:07 +00:00
Adam Langley
26b3fb0a77 Fix build when bcm.c is split up.
Some of the ec files now reference ECDSA_R_BAD_SIGNATURE. Instead, lift the
error-pushing to ecdsa.c.

Change-Id: Ice3e7a22c5099756599df0ab0b215c0752ada4ee
Reviewed-on: https://boringssl-review.googlesource.com/c/32984
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2018-11-08 22:35:51 +00:00
Adam Langley
9edbc7ff9f Revert "Revert "Speed up ECDSA verify on x86-64.""
This reverts commit e907ed4c4b. CPUID
checks have been added so hopefully this time sticks.

Change-Id: I5e0e5b87427c1230132681f936b3c70bac8263b8
Reviewed-on: https://boringssl-review.googlesource.com/c/32924
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2018-11-07 23:57:22 +00:00
David Benjamin
ffbf95ad41 Devirtualize ec_simple_{add,dbl}.
Now that the tuned add/dbl implementations are exposed, these can be
specific to EC_GFp_mont_method and call the felem_mul and felem_sqr
implementations directly.

felem_sqr and felem_mul are still used elsewhere in simple.c, however,
so we cannot get rid of them yet.

Change-Id: I5ea22a8815279931afc98a6fc578bc85e3f8bdcc
Reviewed-on: https://boringssl-review.googlesource.com/c/32849
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2018-11-06 18:32:11 +00:00
Adam Langley
e907ed4c4b Revert "Speed up ECDSA verify on x86-64."
This reverts commit 3d450d2844. It fails
SDE, looks like a missing CPUID check before using vector instructions.

Change-Id: I6b7dd71d9e5b1f509d2e018bd8be38c973476b4e
Reviewed-on: https://boringssl-review.googlesource.com/c/32864
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2018-11-06 00:29:15 +00:00
David Benjamin
cfd50c63a1 Route the tuned add/dbl implementations out of EC_METHOD.
Some consumer stumbled upon EC_POINT_{add,dbl} being faster with a
"custom" P-224 curve than the built-in one and made "custom" clones to
work around this. Before the EC_FELEM refactor, EC_GFp_nistp224_method
used BN_mod_mul for all reductions in fallback point arithmetic (we
primarily support the multiplication functions and keep the low-level
point arithmetic for legacy reasons) which took quite a performance hit.

EC_FELEM fixed this, but standalone felem_{mul,sqr} calls out of
nistp224 perform a lot of reductions, rather than batching them up as
that implementation is intended. So it is still slightly faster to use a
"custom" curve.

Custom curves are the last thing we want to encourage, so just route the
tuned implementations out of EC_METHOD to close this gap. Now the
built-in implementation is always solidly faster than (or identical to)
the custom clone.  This also reduces the number of places where we mix
up tuned vs. generic implementation, which gets us closer to making
EC_POINT's representation EC_METHOD-specific.

Change-Id: I843e1101a6208eaabb56d29d342e886e523c78b4
Reviewed-on: https://boringssl-review.googlesource.com/c/32848
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2018-11-06 00:17:19 +00:00
Nir Drucker
3d450d2844 Speed up ECDSA verify on x86-64.
This commit improves the performance of ECDSA signature verification
(over NIST P-256 curve) for x86 platforms. The speedup is by a factor of 1.15x.
It does so by:
  1) Leveraging the fact that the verification does not need
     to run in constant time. To this end, we implemented:
    a) the function ecp_nistz256_points_mul_public in a similar way to
       the current ecp_nistz256_points_mul function by removing its constant
       time features.
    b) the Binary Extended Euclidean Algorithm (BEEU) in x86 assembly to
       replace the current modular inverse function used for the inversion.
  2) The last step in the ECDSA_verify function compares the (x) affine
     coordinate with the signature (r) value. Converting x from the Jacobian's
     representation to the affine coordinate requires to perform one inversions
     (x_affine = x * z^(-2)). We save this inversion and speed up the computations
     by instead bringing r to x (r_jacobian = r*z^2) which is faster.

The measured results are:
Before (on a Kaby Lake desktop with gcc-5):
Did 26000 ECDSA P-224 signing operations in 1002372us (25938.5 ops/sec)
Did 11000 ECDSA P-224 verify operations in 1043821us (10538.2 ops/sec)
Did 55000 ECDSA P-256 signing operations in 1017560us (54050.9 ops/sec)
Did 17000 ECDSA P-256 verify operations in 1051280us (16170.8 ops/sec)

After (on a Kaby Lake desktop with gcc-5):
Did 27000 ECDSA P-224 signing operations in 1011287us (26698.7 ops/sec)
Did 11640 ECDSA P-224 verify operations in 1076698us (10810.8 ops/sec)
Did 55000 ECDSA P-256 signing operations in 1016880us (54087.0 ops/sec)
Did 20000 ECDSA P-256 verify operations in 1038736us (19254.2 ops/sec)

Before (on a Skylake server platform with gcc-5):
Did 25000 ECDSA P-224 signing operations in 1021651us (24470.2 ops/sec)
Did 10373 ECDSA P-224 verify operations in 1046563us (9911.5 ops/sec)
Did 50000 ECDSA P-256 signing operations in 1002774us (49861.7 ops/sec)
Did 15000 ECDSA P-256 verify operations in 1006471us (14903.6 ops/sec)

After (on a Skylake server platform with gcc-5):
Did 25000 ECDSA P-224 signing operations in 1020958us (24486.8 ops/sec)
Did 10373 ECDSA P-224 verify operations in 1046359us (9913.4 ops/sec)
Did 50000 ECDSA P-256 signing operations in 1003996us (49801.0 ops/sec)
Did 18000 ECDSA P-256 verify operations in 1021604us (17619.4 ops/sec)

Developers and authors:
***************************************************************************
Nir Drucker (1,2), Shay Gueron (1,2)
(1) Amazon Web Services Inc.
(2) University of Haifa, Israel
***************************************************************************

Change-Id: Idd42a7bc40626bce974ea000b61fdb5bad33851c
Reviewed-on: https://boringssl-review.googlesource.com/c/31304
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2018-11-05 23:48:07 +00:00
Adam Langley
7f7e5e231e Include details about latest FIPS certification.
Change-Id: I84cda22a1086bce0da4797afae7975b3f39625de
Reviewed-on: https://boringssl-review.googlesource.com/c/32844
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2018-11-05 19:03:25 +00:00
David Benjamin
e62bf02a13 Don't overflow state->calls on 16TiB RAND_bytes calls.
This is an extremely important and practical use case. The comment that
state->calls is bounded by the reseed interval isn't quite true. We only
check on entry to the function, which means that it may exceed it by one
call's worth. Switch it to a size_t (which doesn't actually increase
memory because the struct was already padded).

Change-Id: Ia7646fd5b4142789c1d613280223baa4cd1a4a9b
Reviewed-on: https://boringssl-review.googlesource.com/c/32804
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2018-11-02 18:33:43 +00:00
David Benjamin
53d9fdd548 Fix the build on glibc 2.15.
glibc didn't add getauxval or sys/auxv.h until 2.16. glib 2.16.0 is six
years old and thus glibc 2.15 is past our support horizon, however
Android is using an outdated sysroot. Temporarily allow this until they
fix their toolchain.

Change-Id: I24e231cf40829e446969f67bf15c32e0b007de4c
Reviewed-on: https://boringssl-review.googlesource.com/c/32686
Reviewed-by: Robert Sloan <varomodt@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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2018-10-24 17:39:48 +00:00
Robert Sloan
127a1ec080 Fix redefinition of AEAD asserts in e_aes.c.
Following https://boringssl-review.googlesource.com/c/32506. Many parts
of android don't have c11 support, and so they complain when these
asserts implicitly redefine, e.g. AEAD_state_too_small.

Failure reference: https://android-build.googleplex.com/builds/pending/P6876320/aosp_cf_x86_phone-userdebug/latest/view/logs/build_error.log

Change-Id: Icbdd9aec6bf3b3d87e15d7f4f37505a1639b59c0
Reviewed-on: https://boringssl-review.googlesource.com/c/32684
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2018-10-24 00:29:29 +00:00
Robert Sloan
b64c53fcfd Guard sys/auxv.h include on !BORINGSSL_ANDROID.
Some versions of Android libc don't even include the header.

Change-Id: Ib1033d2b8a10ba69d834ac1ed2564870e0e35d61
Reviewed-on: https://boringssl-review.googlesource.com/c/32664
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2018-10-23 18:20:59 +00:00
Adam Langley
35fb591f24 Flatten EVP_AEAD_CTX
An EVP_AEAD_CTX used to be a small struct that contained a pointer to
an AEAD-specific context. That involved heap allocating the
AEAD-specific context, which was a problem for users who wanted to setup
and discard these objects quickly.

Instead this change makes EVP_AEAD_CTX large enough to contain the
AEAD-specific context inside itself. The dominant AEAD is AES-GCM, and
that's also the largest. So, in practice, this shouldn't waste too much
memory.

Change-Id: I795cb37afae9df1424f882adaf514a222e040c80
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2018-10-22 23:12:57 +00:00
Adam Langley
dd412c428a Print the name of the binary when blocking in getrandom.
If a startup process blocks, it's very useful to know which it was.

Change-Id: I04dd541695a61cfceb8142ea45d4bd5e3492c6ec
Update-note: updates internal bug 117227663.
Reviewed-on: https://boringssl-review.googlesource.com/c/32544
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2018-10-18 18:13:12 +00:00
Yoshisato Yanagisawa
e341802802 Fix div.c to divide BN_ULLONG only if BN_CAN_DIVIDE_ULLONG defined.
Since clang-cl uses __udivti3 for __uint128_t division, linking div.obj
fails.  Let me make div.c use BN_CAN_DIVIDE_ULLONG to decide using
__uint128_t division instead of BN_ULLONG.

Bug: https://bugs.chromium.org/p/chromium/issues/detail?id=787617
Change-Id: I3ebe245f6b8917d59409591992efbabddea08187
Reviewed-on: https://boringssl-review.googlesource.com/c/32404
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2018-10-10 15:33:35 +00:00
Aaron Green
28babde159 Include aes.h in mode/internal.h
block128_f was recently changed to take an AES_KEY instead of a void*,
but AES_KEY is not defined in base.h.  internal.h should not depend on
other sources to include aes.h for it.

Change-Id: I81aab5124ce4397eb76a83ff09779bfaea66d3c1
Reviewed-on: https://boringssl-review.googlesource.com/32364
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2018-10-03 17:36:04 +00:00
Aaron Green
c1eef7f795 [perlasm] Hide OPENSSL_armcap_P in assembly
This CL changes adds a ".hidden OPENSSL_armcap_P" statement to the
".comm OPENSSL_armcap_P" statements for the sha*-armv8.pl files,
similar to what was doen for the sha*-armv4.pl files in CL 3471.

Change-Id: I524b3dce7e5cfe017498847fbf9b8a5df4b98fce
Reviewed-on: https://boringssl-review.googlesource.com/c/32324
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2018-10-02 20:36:43 +00:00
David Benjamin
73535ab252 Fix undefined block128_f, etc., casts.
This one is a little thorny. All the various block cipher modes
functions and callbacks take a void *key. This allows them to be used
with multiple kinds of block ciphers.

However, the implementations of those callbacks are the normal typed
functions, like AES_encrypt. Those take AES_KEY *key. While, at the ABI
level, this is perfectly fine, C considers this undefined behavior.

If we wish to preserve this genericness, we could either instantiate
multiple versions of these mode functions or create wrappers of
AES_encrypt, etc., that take void *key.

The former means more code and is tedious without C++ templates (maybe
someday...). The latter would not be difficult for a compiler to
optimize out. C mistakenly allowed comparing function pointers for
equality, which means a compiler cannot replace pointers to wrapper
functions with the real thing. (That said, the performance-sensitive
bits already act in chunks, e.g. ctr128_f, so the function call overhead
shouldn't matter.)

But our only 128-bit block cipher is AES anyway, so I just switched
things to use AES_KEY throughout. AES is doing fine, and hopefully we
would have the sense not to pair a hypothetical future block cipher with
so many modes!

Change-Id: Ied3e843f0e3042a439f09e655b29847ade9d4c7d
Reviewed-on: https://boringssl-review.googlesource.com/32107
Reviewed-by: Adam Langley <agl@google.com>
2018-10-01 17:35:02 +00:00
Adam Langley
3474270abd Always print some diagnostic information when POST fails.
Debugging a POST failure when it prints nothing is painful. The
|check_test| helper already prints out information when it fails, but
some other paths were not handled. This change adds printfs for those
cases.

Change-Id: Ife71bb292a4f69679d0fa56686863aae9423e451
Updating-Note: updates internal bug 116469121
Reviewed-on: https://boringssl-review.googlesource.com/32145
Reviewed-by: David Benjamin <davidben@google.com>
2018-09-28 19:33:38 +00:00
Matthew Braithwaite
7039f40368 Rename inject-hash: Bazel does not like hyphens.
(Only in package names.  Hyphens in file names are file.)

Change-Id: I80b705a780ffbad056abe7a7868d5682b30d2d44
Reviewed-on: https://boringssl-review.googlesource.com/32144
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Reviewed-by: David Benjamin <davidben@google.com>
2018-09-26 21:50:36 +00:00
Adam Langley
5ede28c8a4 Tighten up getrandom handling.
While I don't believe EINTR can occur with a non-blocking getrandom call
when talking to the kernel directly, that may not be true when certain
sandboxing systems are being used.

Additionally, with this change we will no longer silently ignore errors
other than ENOSYS.

Update-Note: update internal bug 115344138.

Change-Id: I952c132cf325dcc17dc38e68f054abc41de1f8b0
Reviewed-on: https://boringssl-review.googlesource.com/32006
Reviewed-by: David Benjamin <davidben@google.com>
2018-09-20 16:15:51 +00:00
David Benjamin
5baee45652 Use Go modules with delocate.
This makes running go test, etc., in util/fipstools/delocate work! This
adds a go_executable command to CMake like:

  go_executable(delocate boringssl.googlesource.com/boringssl/util/fipstools/delocate)

which internally gets dependencies and whatnot so it behaves like usual
Go.

Update-Note: delocate has been rearranged a bit.
Change-Id: I244a7317dd8d4f2ab77a0daa624ed3e0b385faef
Reviewed-on: https://boringssl-review.googlesource.com/31885
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2018-09-17 22:19:52 +00:00
David Benjamin
302ef5ee12 Keep the GCM bits in one place.
This avoids needing to duplicate the "This API differs [...]" comment.

Change-Id: If07c77bb66ecdae4e525fa01cc8c762dbacb52f1
Reviewed-on: https://boringssl-review.googlesource.com/32005
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2018-09-17 22:12:21 +00:00
David Benjamin
580be2b184 Trim 88 bytes from each AES-GCM EVP_AEAD.
EVP_AEAD reused portions of EVP_CIPHER's GCM128_CONTEXT which contains both the
key and intermediate state for each operation. (The legacy OpenSSL EVP_CIPHER
API has no way to store just a key.) Split out a GCM128_KEY and store that
instead.

Change-Id: Ibc550084fa82963d3860346ed26f9cf170dceda5
Reviewed-on: https://boringssl-review.googlesource.com/32004
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2018-09-17 22:05:51 +00:00
Phillipp Schoppmann
bef6cc2933 Fix check of the pointer returned by BN_CTX_get
The check of `r` instead of `rr` was introduced in change
I298400b988e3bd108d01d6a7c8a5b262ddf81feb.

Change-Id: I4376a81c65856f6457b0a11276176bf35e9c647d
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2018-09-11 16:35:22 +00:00
David Benjamin
967cd8219c Mark the C version of md5_block_data_order static.
This doesn't really matter, but once less visible symbol.

Change-Id: If4ee8cfe5c9db9d1c05ca74b8c6fee5cf3ea5a9b
Reviewed-on: https://boringssl-review.googlesource.com/31764
Reviewed-by: Adam Langley <agl@google.com>
2018-09-07 20:00:12 +00:00
David Benjamin
19ac2666b9 Make symbol-prefixing work on ARM.
The assembly files need some includes. Also evp.h has some conflicting
macros. Finally, md5.c's pattern of checking if a function name is
defined needs to switch to checking MD5_ASM.

Change-Id: Ib1987ba6f279144f0505f6951dead53968e05f20
Reviewed-on: https://boringssl-review.googlesource.com/31704
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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2018-09-07 17:43:05 +00:00
Joshua Liebow-Feeser
8c7c6356e6 Support symbol prefixes
- In base.h, if BORINGSSL_PREFIX is defined, include
  boringssl_prefix_symbols.h
- In all .S files, if BORINGSSL_PREFIX is defined, include
  boringssl_prefix_symbols_asm.h
- In base.h, BSSL_NAMESPACE_BEGIN and BSSL_NAMESPACE_END are
  defined with appropriate values depending on whether
  BORINGSSL_PREFIX is defined; these macros are used in place
  of 'namespace bssl {' and '}'
- Add util/make_prefix_headers.go, which takes a list of symbols
  and auto-generates the header files mentioned above
- In CMakeLists.txt, if BORINGSSL_PREFIX and BORINGSSL_PREFIX_SYMBOLS
  are defined, run util/make_prefix_headers.go to generate header
  files
- In various CMakeLists.txt files, add "global_target" that all
  targets depend on to give us a place to hook logic that must run
  before all other targets (in particular, the header file generation
  logic)
- Document this in BUILDING.md, including the fact that it is
  the caller's responsibility to provide the symbol list and keep it
  up to date
- Note that this scheme has not been tested on Windows, and likely
  does not work on it; Windows support will need to be added in a
  future commit

Change-Id: If66a7157f46b5b66230ef91e15826b910cf979a2
Reviewed-on: https://boringssl-review.googlesource.com/31364
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2018-09-06 20:07:52 +00:00
David Benjamin
53affef486 No negative moduli.
https://boringssl-review.googlesource.com/31085 wasn't right. We already forbid
creating BN_MONT_CTX on negative numbers, which means almost all moduli already
don't work with BN_mod_exp_mont. Only -1 happened to not get rejected, but it
computed the wrong value. Reject it instead.

Update-Note: BN_mod_exp* will no longer work for negative moduli. It already
didn't work for all negative odd moduli other than -1, so rejecting -1 and
negative evens is unlikely to be noticed.

Bug: 71
Change-Id: I7c713d417e2e6512f3e78f402de88540809977e3
Reviewed-on: https://boringssl-review.googlesource.com/31484
Reviewed-by: Adam Langley <agl@google.com>
2018-09-04 22:26:53 +00:00
David Benjamin
2556f8ba60 Clarify thread-safety of key objects.
This often causes confusion since, for various silly reasons (intrinsic
ref-counting, FOO_METHOD, and RSA's cached Montgomery bits), the thread
safety of some functions don't match the usual const/non-const
distinction. Fix const-ness where easy and document it otherwise.

Change-Id: If2037a4874d7580cc79b18ee21f12ae0f47db7fd
Reviewed-on: https://boringssl-review.googlesource.com/31344
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Reviewed-by: Adam Langley <agl@google.com>
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2018-08-28 18:52:59 +00:00
David Benjamin
a130ce0b71 Update TLS 1.3 citations for the final RFC.
Change-Id: I2d1671a4f21a602191fd0c9b932244a376ac5713
Reviewed-on: https://boringssl-review.googlesource.com/31104
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Reviewed-by: Steven Valdez <svaldez@google.com>
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2018-08-16 18:37:50 +00:00
David Benjamin
378cca8016 Handle a modulus of -1 correctly.
Historically, OpenSSL's modular exponentiation functions tolerated negative
moduli by ignoring the sign bit. The special case for a modulus of 1 should do
the same. That said, this is ridiculous and the only reason I'm importing this
is BN_abs_is_word(1) is marginally more efficient than BN_is_one() and we
haven't gotten around to enforcing positive moduli yet.

Thanks to Guido Vranken and OSSFuzz for finding this issue and reporting to
OpenSSL.

(Imported from upstream's 235119f015e46a74040b78b10fd6e954f7f07774.)

Change-Id: I526889dfbe2356753aa1e6ecfd3aa3dc3a8cd2b8
Reviewed-on: https://boringssl-review.googlesource.com/31085
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2018-08-16 15:57:10 +00:00
Adam Langley
cac346eddb Update Miller–Rabin check numbers.
This imports upstream's be4e1f79f631e49c76d02fe4644b52f907c374b2.

Change-Id: If0c4f066ba0ce540beaddd6a3e2540165d949dd2
Reviewed-on: https://boringssl-review.googlesource.com/31024
Commit-Queue: David Benjamin <davidben@google.com>
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2018-08-14 23:10:53 +00:00
David Benjamin
e6fd125d31 Align on a single CMake style.
We currently write a mix of "if (FOO)" and "if(FOO)". While the former looks
more like a usual language, CMake believes everything, even "if" and "else", is
just a really really funny function call (a "command").

We should pick something for consistency. Upstream CMake writes "if(FOO)", so
go with that one.

Change-Id: I67e0eb650a52670110b417312a362c9f161c8721
Reviewed-on: https://boringssl-review.googlesource.com/30807
Reviewed-by: Adam Langley <agl@google.com>
2018-08-10 16:22:31 +00:00
David Benjamin
a3202d7bc1 Add EVP_CTRL_AEAD_* constants.
Upstream generalized most of the EVP_CTRL_GCM_* constants to be their general
AEAD API in 1.1.0. Define them for better compatibility with code that targets
OpenSSL 1.1.0.

Change-Id: Ieaed8379eebde3718e3048f6290c21cdeac01efd
Reviewed-on: https://boringssl-review.googlesource.com/30604
Commit-Queue: David Benjamin <davidben@google.com>
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2018-08-09 17:08:15 +00:00
Adam Langley
6410e18e91 Update several assembly files from upstream.
This change syncs several assembly files from upstream. The only meanful
additions are more CFI directives.

Change-Id: I6aec50b6fddbea297b79bae22cfd68d5c115220f
Reviewed-on: https://boringssl-review.googlesource.com/30364
Reviewed-by: Adam Langley <agl@google.com>
2018-08-07 18:57:17 +00:00
Adam Langley
c448f1759a Fix the build with FIPS + NO_ASM.
Setting OPENSSL_NO_ASM skips enabling the “ASM” language in CMake.
However, the FIPS module fundamentally needs to build asm because
delocate works via textual assembly. Thus this combination is currently
broken with CMake.

This change ensures that support for building asm is enabled in CMake
for this combination.

Change-Id: I4516cf3a6f579ee7c72f04ac25d15785926cf125
Reviewed-on: https://boringssl-review.googlesource.com/29884
Reviewed-by: Adam Langley <agl@google.com>
2018-07-30 22:43:25 +00:00
Adam Langley
4732c544f7 Add ECDH_compute_key_fips inside the module.
This change adds a function so that an ECDH and the hashing of the
resulting 'x' coordinate can occur inside the FIPS boundary.

Change-Id: If93c20a70dc9dcbca49056f10915d3ce064f641f
Reviewed-on: https://boringssl-review.googlesource.com/30104
Reviewed-by: Adam Langley <agl@google.com>
2018-07-30 22:40:31 +00:00
David Benjamin
20b6a4e2a1 Clear r->neg in bn_mod_{add,sub}_consttime.
Otherwise, if the output BIGNUM was previously negative, we'd incorrectly give
a negative result. Thanks to Guide Vranken for reporting this issue!

Fortunately, this does not appear to come up in any existing caller. This isn't
all that surprising as negative numbers never really come up in cryptography.
Were it not for OpenSSL historically designing a calculator API, we'd just
delete the bit altogether. :-(

Bug: chromium:865924
Change-Id: I28fdc986dfaba3e38435b14ebf07453d537cc60a
Reviewed-on: https://boringssl-review.googlesource.com/29944
Commit-Queue: David Benjamin <davidben@google.com>
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2018-07-20 23:45:06 +00:00
Adam Langley
82639e6f53 Use a pool of |rand_state| objects.
Previously we used thread-local state objects in rand.c. However, for
applications with large numbers of threads, this can lead to excessive
memory usage.

This change causes us to maintain a mutex-protected pool of state
objects where the size of the pool equals the maximum concurrency of
|RAND_bytes|. This might lead to state objects bouncing between CPUs
more often, but should help the memory usage problem.

Change-Id: Ie83763d3bc139e64ac17bf7e015ad082b2f8a81a
Reviewed-on: https://boringssl-review.googlesource.com/29565
Commit-Queue: Adam Langley <agl@google.com>
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Reviewed-by: David Benjamin <davidben@google.com>
2018-07-06 21:25:37 +00:00
Adam Langley
03de6813d8 Write error messages in the FIPS module to stderr.
Previously, delocate.go couldn't handle GOT references and so |stderr|
was a problematic symbol. We can cope with them now, so write FIPS
power-on test and urandom errors to stderr rather than stdout.

Change-Id: If6d7c19ee5f22dcbd74fb01c231500c2e130e6f7
Update-note: resolves internal bug 110102292.
Reviewed-on: https://boringssl-review.googlesource.com/29244
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
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2018-06-25 10:30:42 +00:00
Adam Langley
bcfb49914b Add special AES-GCM AEAD for TLS 1.3.
This change adds an AES-GCM AEAD that enforces nonce uniqueness inside
the FIPS module, like we have for TLS 1.2. While TLS 1.3 has not yet
been mentioned in the FIPS 140 IG, we expect it to be in the next ~12
months and so are preparing for that.

Change-Id: I65a7d8196b08dc0033bdde5c844a73059da13d9e
Reviewed-on: https://boringssl-review.googlesource.com/29224
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Reviewed-by: David Benjamin <davidben@google.com>
2018-06-25 10:23:22 +00:00
David Benjamin
f6e5d0d5a1 Add AES-192-OFB.
cryptography.io gets offended if the library supports some OFB sizes but
not others.

Change-Id: I7fc7b12e7820547a82aae84d9418457389a482fe
Reviewed-on: https://boringssl-review.googlesource.com/29204
Reviewed-by: Adam Langley <agl@google.com>
2018-06-18 21:58:46 +00:00
David Benjamin
dd935202c9 Zero-initialize tmp in ec_GFp_simple_mul_single.
Although the original value of tmp does not matter, the selects
ultimately do bit operations on the uninitialized values and thus depend
on them behaving like *some* consistent concrete value. The C spec
appears to allow uninitialized values to resolve to trap
representations, which means this isn't quite valid..

(If I'm reading it wrong and the compiler must behave as if there were a
consistent value in there, it's probably fine, but there's no sense in
risking compiler bugs on a subtle corner of things.)

Change-Id: Id4547b0ec702414b387e906c4de55595e6214ddb
Reviewed-on: https://boringssl-review.googlesource.com/29124
Commit-Queue: Steven Valdez <svaldez@google.com>
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2018-06-13 19:58:24 +00:00
Adam Langley
1627871d18 Include bn/internal.h for RSAZ code.
When building files separately, omitting this causes some #defines to be
missing.

Change-Id: I235231467d3f51ee0a53325698356aefa72c6a67
Reviewed-on: https://boringssl-review.googlesource.com/28944
Commit-Queue: Adam Langley <agl@google.com>
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2018-06-04 17:26:29 +00:00
David Benjamin
a827d1809c Match OpenSSL's EVP_MD_CTX_reset return value.
In neither OpenSSL nor BoringSSL can this function actually fail, but
OpenSSL makes it return one anyway. Match them for compatibility.

Change-Id: I497437321ad9ccc5da738f06cd5b19c467167575
Reviewed-on: https://boringssl-review.googlesource.com/28784
Commit-Queue: Steven Valdez <svaldez@google.com>
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2018-05-29 17:07:16 +00:00
Brian Smith
fee8709f69 Replace |alloca| in |BN_mod_exp_mont_consttime|.
|alloca| is dangerous and poorly specified, according to any
description of |alloca|. It's also hard for some analysis tools to
reason about.

The code here assumed |alloca| is a macro, which isn't a valid
assumption. Depending on what which headers are included and what
toolchain is being used, |alloca| may or may not be defined as a macro,
and this might change over time if/when toolchains are updated. Or, we
might be doing static analysis and/or dynamic analysis with a different
configuration w.r.t. the availability of |alloca| than production
builds use.

Regardless, the |alloca| code path only kicked in when the inputs are
840 bits or smaller. Since the multi-prime RSA support was removed, for
interesting RSA key sizes the input will be at least 1024 bits and this
code path won't be triggered since powerbufLen will be larger than 3072
bytes in those cases. ECC inversion via Fermat's Little Theorem has its
own constant-time exponentiation so there are no cases where smaller
inputs need to be fast.

The RSAZ code avoids the |OPENSSL_malloc| for 2048-bit RSA keys.
Increasingly the RSAZ code won't be used though, since it will be
skipped over on Broadwell+ CPUs. Generalize the RSAZ stack allocation
to work for non-RSAZ code paths. In order to ensure this doesn't cause
too much stack usage on platforms where RSAZ wasn't already being used,
only do so on x86-64, which already has this large stack size
requirement due to RSAZ.

This change will make it easier to refactor |BN_mod_exp_mont_consttime|
to do that more safely and in a way that's more compatible with various
analysis tools.

This is also a step towards eliminating the |uintptr_t|-based alignment
hack.

Since this change increases the number of times |OPENSSL_free| is
skipped, I've added an explicit |OPENSSL_cleanse| to ensure the
zeroization is done. This should be done regardless of the other changes
here.

Change-Id: I8a161ce2720a26127e85fff7513f394883e50b2e
Reviewed-on: https://boringssl-review.googlesource.com/28584
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2018-05-21 19:43:05 +00:00
Adam Langley
63e2a08123 Spell Falko Strenzke's name correctly.
Thanks to Brian Smith for pointing this out.

Change-Id: I27ae58df0028bc6aa3a11741acb5453369e202cc
Reviewed-on: https://boringssl-review.googlesource.com/28625
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2018-05-21 18:18:04 +00:00
David Benjamin
2f5100e629 More compatibility stuff.
cryptography.io wants things exposed out of EVP_get_cipherby* including,
sadly, ECB mode.

Change-Id: I9bac46f8ffad1a79d190cee3b0c0686bf540298e
Reviewed-on: https://boringssl-review.googlesource.com/28464
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2018-05-15 23:57:53 +00:00
Adam Langley
91254c244c Rename |asm_AES_*| to |aes_nohw_*|.
Rather than have plain-C functions, asm functions, and accelerated
functions, just have accelerated and non-accelerated, where the latter
are either provided by assembly or by C code.

Pertinently, this allows Aarch64 to use hardware accel for the basic
|AES_*| functions.

Change-Id: I0003c0c7a43d85a3eee8c8f37697f61a3070dd40
Reviewed-on: https://boringssl-review.googlesource.com/28385
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2018-05-15 23:02:52 +00:00
David Benjamin
d12f2ba55e Tweak RSA errors for compatibility.
cryptography.io wants RSA_R_BLOCK_TYPE_IS_NOT_02, only used by the
ancient RSA_padding_check_SSLv23 function. Define it but never emit it.

Additionally, it's rather finicky about RSA_R_TOO_LARGE* errors. We
merged them in BoringSSL because having RSA_R_TOO_LARGE,
RSA_R_TOO_LARGE_FOR_MODULUS, and RSA_R_TOO_LARGE_FOR_KEY_SIZE is a
little silly. But since we don't expect well-behaved code to condition
on error codes anyway, perhaps that wasn't worth it.  Split them back
up.

Looking through OpenSSL, there is a vague semantic difference:

RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY - Specifically emitted if a digest is
too big for PKCS#1 signing with this key.

RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE - You asked me to sign or encrypt a
digest/plaintext, but it's too big for this key.

RSA_R_DATA_TOO_LARGE_FOR_MODULUS - You gave me an RSA ciphertext or
signature and it is not fully reduced modulo N.
-OR-
The padding functions produced something that isn't reduced, but I
believe this is unreachable outside of RSA_NO_PADDING.

RSA_R_DATA_TOO_LARGE - Some low-level padding function was told to copy
a digest/plaintext into some buffer, but the buffer was too small. I
think this is basically unreachable.
-OR-
You asked me to verify a PSS signature, but I didn't need to bother
because the digest/salt parameters you picked were too big.

Update-Note: This depends on cl/196566462.
Change-Id: I2e539e075eff8bfcd52ccde365e975ebcee72567
Reviewed-on: https://boringssl-review.googlesource.com/28547
Reviewed-by: Adam Langley <agl@google.com>
2018-05-15 23:02:49 +00:00
Adam Langley
05750f23ae Revert "Revert "Revert "Revert "Make x86(-64) use the same aes_hw_* infrastructure as POWER and the ARMs.""""
This was reverted a second time because it ended up always setting the
final argument to CRYPTO_gcm128_init to zero, which disabled some
acceleration of GCM on ≥Haswell. With this update, that argument will be
set to 1 if |aes_hw_*| functions are being used.

Probably this will need to be reverted too for some reason. I'm hoping
to fill the entire git short description with “Revert”.

Change-Id: Ib4a06f937d35d95affdc0b63f29f01c4a8c47d03
Reviewed-on: https://boringssl-review.googlesource.com/28484
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2018-05-14 22:09:29 +00:00
Adam Langley
69271b5d4f Revert "Revert "Revert "Make x86(-64) use the same aes_hw_* infrastructure as POWER and the ARMs."""
gcm.c's AES-NI code wasn't triggering. (Thanks Brain for noting.)

Change-Id: Ic740e498b94fece180ac35c449066aee1349cbd5
Reviewed-on: https://boringssl-review.googlesource.com/28424
Reviewed-by: Adam Langley <alangley@gmail.com>
Commit-Queue: Adam Langley <agl@google.com>
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2018-05-12 15:18:16 +00:00
Adam Langley
7d1f35985b Show an error before we abort the process for an entropy failure.
Change-Id: I8d8483d38de15dcde18141bb9cc9e79d585d24ad
Reviewed-on: https://boringssl-review.googlesource.com/27045
Reviewed-by: Adam Langley <agl@google.com>
2018-05-11 22:30:24 +00:00
David Benjamin
99767ecdd4 Enable ADX assembly.
Build (and carry) issues are now resolved (as far as we know). Let's try
this again...

Measurements on a Skylake VM (so a little noisy).

Before:
Did 3135 RSA 2048 signing operations in 3015866us (1039.5 ops/sec)
Did 89000 RSA 2048 verify (same key) operations in 3007271us (29594.9 ops/sec)
Did 66000 RSA 2048 verify (fresh key) operations in 3014363us (21895.2 ops/sec)
Did 324 RSA 4096 signing operations in 3004364us (107.8 ops/sec)
Did 23126 RSA 4096 verify (same key) operations in 3003398us (7699.9 ops/sec)
Did 21312 RSA 4096 verify (fresh key) operations in 3017043us (7063.9 ops/sec)
Did 31040 ECDH P-256 operations in 3024273us (10263.6 ops/sec)
Did 91000 ECDSA P-256 signing operations in 3019740us (30135.0 ops/sec)
Did 25678 ECDSA P-256 verify operations in 3046975us (8427.4 ops/sec)

After:
Did 3640 RSA 2048 signing operations in 3035845us (1199.0 ops/sec)
Did 129000 RSA 2048 verify (same key) operations in 3003691us (42947.2 ops/sec)
Did 105000 RSA 2048 verify (fresh key) operations in 3029935us (34654.2 ops/sec)
Did 510 RSA 4096 signing operations in 3014096us (169.2 ops/sec)
Did 38000 RSA 4096 verify (same key) operations in 3092814us (12286.5 ops/sec)
Did 34221 RSA 4096 verify (fresh key) operations in 3003817us (11392.5 ops/sec)
Did 38000 ECDH P-256 operations in 3061758us (12411.2 ops/sec)
Did 116000 ECDSA P-256 signing operations in 3001637us (38645.6 ops/sec)
Did 35100 ECDSA P-256 verify operations in 3023872us (11607.6 ops/sec)

Tested with Intel SDE.

Change-Id: Ib27c0d6012d14274e331ab03f958e5a0c8b7e885
Reviewed-on: https://boringssl-review.googlesource.com/28104
Reviewed-by: Adam Langley <agl@google.com>
2018-05-11 21:57:13 +00:00
Adam Langley
29d97ff333 Revert "Revert "Make x86(-64) use the same aes_hw_* infrastructure as POWER and the ARMs.""
This relands
https://boringssl-review.googlesource.com/c/boringssl/+/28026 with a
change to avoid calling the Aarch64 hardware functions when the set has
been set by C code, since these are seemingly incompatible.

Change-Id: I91f3ed41cf6f7a7ce7a0477753569fac084c528b
Reviewed-on: https://boringssl-review.googlesource.com/28384
Reviewed-by: Adam Langley <agl@google.com>
2018-05-11 19:16:49 +00:00
Adam Langley
aca24c8724 Revert "Make x86(-64) use the same aes_hw_* infrastructure as POWER and the ARMs."
Broke Aarch64 on the main builders (but not the trybots, somehow.)

Change-Id: I53eb09c99ef42a59628b0506b5ddb125299b554a
Reviewed-on: https://boringssl-review.googlesource.com/28364
Reviewed-by: Adam Langley <agl@google.com>
2018-05-11 17:39:50 +00:00
Adam Langley
26ba48a6fb Make x86(-64) use the same aes_hw_* infrastructure as POWER and the ARMs.
This also happens to make the AES_[en|de]crypt functions use AES-NI
(where available) on Intel.

Update-Note: this substantially changes how AES-NI is triggered. Worth running bssl speed (on both k8 and ppc), before and after, to confirm that there are no regressions.

Change-Id: I5f22c1975236bbc1633c24ab60d683bca8ddd4c3
Reviewed-on: https://boringssl-review.googlesource.com/28026
Reviewed-by: David Benjamin <davidben@google.com>
2018-05-11 00:16:39 +00:00
Adam Langley
f64c373784 Fix build with GCC 4.9.2 and -Wtype-limits.
gRPC builds on Debian Jessie, which has GCC 4.9.2, and builds with
-Wtype-limits, which makes it warn about code intended for 64-bit
systems when building on 32-bit systems.

We have tried to avoid these issues with Clang previously by guarding
with “sizeof(size_t) > 4”, but this version of GCC isn't smart enough to
figure that out.

Change-Id: I800ceb3891436fa7c81474ede4b8656021568357
Reviewed-on: https://boringssl-review.googlesource.com/28247
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>
2018-05-08 22:21:45 +00:00
David Benjamin
bb3a456930 Move some RSA keygen support code into separate files.
This was all new code. There was a request to make this available under
ISC.

Change-Id: Ibabbe6fbf593c2a781aac47a4de7ac378604dbcf
Reviewed-on: https://boringssl-review.googlesource.com/28267
Reviewed-by: Adam Langley <agl@google.com>
2018-05-08 21:25:46 +00:00
David Benjamin
5d626b223b Add some more compatibility functions.
Change-Id: I56afcd896cb9de1c69c788b4f6395f4e78140d81
Reviewed-on: https://boringssl-review.googlesource.com/28265
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>
2018-05-08 20:51:15 +00:00
Adam Langley
57eaeaba24 Fix include path.
This happened to be working only because of lucky -I argument and At the
same time, include digest.h since this file references |EVP_sha1| and
other digest-related functions.

Change-Id: I0095ea8f5ef21f6e63b3dc819932b38178e09693
Reviewed-on: https://boringssl-review.googlesource.com/28244
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>
2018-05-08 16:26:05 +00:00
David Benjamin
0318b051ee Add some OpenSSL compatibility functions and hacks.
Change-Id: Ie42e57441f5fd7d1557a7fc1c648cf3f28b9c4db
Reviewed-on: https://boringssl-review.googlesource.com/28224
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2018-05-08 01:22:04 +00:00
David Benjamin
2a92847c24 Restore some MSVC warnings.
bcm.c means e_aes.c can no longer be lazy about warning push/pop.

Change-Id: I558041bab3baa00e3adc628fe19486545d0f6be3
Reviewed-on: https://boringssl-review.googlesource.com/28164
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2018-05-07 19:03:30 +00:00
David Benjamin
bf33114b51 Rename third_party/wycheproof to satisfy a bureaucrat.
Make it clear this is not a pristine full copy of all of Wycheproof as a
library.

Change-Id: I1aa5253a1d7c696e69b2e8d7897924f15303d9ac
Reviewed-on: https://boringssl-review.googlesource.com/28188
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2018-05-07 18:33:50 +00:00