This is not a speedy operation, so the fuzzers need a bit of help to
avoid timeouts.
Bug: chromium:786049
Change-Id: Ib56281b63eb6c895057f21254f0cc7c5c2d85ee4
Reviewed-on: https://boringssl-review.googlesource.com/23484
Commit-Queue: Steven Valdez <svaldez@google.com>
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This throws me off every time.
Change-Id: I19848927fe821f7656dea0343361d70dae4007c9
Reviewed-on: https://boringssl-review.googlesource.com/23445
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OBJ_txt2obj is currently implemented using BIGNUMs which is absurd. It
also depends on the giant OID table, which is undesirable. Write a new
one and expose the low-level function so Chromium can use it without the
OID table.
Bug: chromium:706445
Change-Id: I61ff750a914194f8776cb8d81ba5d3eb5eaa3c3d
Reviewed-on: https://boringssl-review.googlesource.com/23364
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Steven Valdez <svaldez@google.com>
Change-Id: I60dc085fa02c152adb12a505b453fe8f84670d8b
Reviewed-on: https://boringssl-review.googlesource.com/23464
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This avoids taking quadratic time to pretty-print certificates with
excessively large integer fields. Very large integers aren't any more
readable in decimal than hexadecimal anyway, and the i2s_* functions
will parse either form.
Found by libFuzzer.
Change-Id: Id586cd1b0eef8936d38ff50433ae7c819f0054f3
Reviewed-on: https://boringssl-review.googlesource.com/23424
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Reviewed-by: Adam Langley <agl@google.com>
DECLARE_STACK_OF adds a trailing ; so we don't need a second one added
here.
Compiling a project using boringssl which uses -Werror,-Wextra-semi I
get errors:
```
third_party/boringssl/include/openssl/stack.h:374:1: error: extra ';' outside of a function [-Werror,-Wextra-semi]
DEFINE_STACK_OF(void)
^
third_party/boringssl/include/openssl/stack.h:355:3: note: expanded from macro 'DEFINE_STACK_OF'
BORINGSSL_DEFINE_STACK_OF_IMPL(type, type *, const type *) \
^
third_party/boringssl/include/openssl/stack.h:248:25: note: expanded from macro 'BORINGSSL_DEFINE_STACK_OF_IMPL'
DECLARE_STACK_OF(name); \
^
third_party/boringssl/include/openssl/stack.h:375:1: error: extra ';' outside of a function [-Werror,-Wextra-semi]
DEFINE_SPECIAL_STACK_OF(OPENSSL_STRING)
^
third_party/boringssl/include/openssl/stack.h:369:3: note: expanded from macro 'DEFINE_SPECIAL_STACK_OF'
BORINGSSL_DEFINE_STACK_OF_IMPL(type, type, const type)
^
third_party/boringssl/include/openssl/stack.h:248:25: note: expanded from macro 'BORINGSSL_DEFINE_STACK_OF_IMPL'
DECLARE_STACK_OF(name); \
^
2 errors generated.
```
Change-Id: Icc39e2341eb76544be72d2d7d0bd29e2f1ed0bf9
Reviewed-on: https://boringssl-review.googlesource.com/23404
Reviewed-by: David Benjamin <davidben@google.com>
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Matches the OpenSSL 1.1.0 spelling, which is what we advertise in
OPENSSL_VERSION_NUMBER now. Otherwise third-party code which uses it
will, in the long term, need ifdefs. Note this will require updates to
any existing callers (there appear to only be a couple of them), but it
should be straightforward.
Change-Id: I9dd1013609abca547152728a293529055dacc239
Reviewed-on: https://boringssl-review.googlesource.com/23325
Reviewed-by: Adam Langley <agl@google.com>
This is only a hair faster than the signing change, but still something.
I kept the call to BN_mod_inverse_odd as that appears to be faster
(constant time is not a concern for verification).
Before:
Did 22855 ECDSA P-224 verify operations in 3015099us (7580.2 ops/sec)
Did 21276 ECDSA P-256 verify operations in 3083284us (6900.4 ops/sec)
Did 2635 ECDSA P-384 verify operations in 3032582us (868.9 ops/sec)
Did 1240 ECDSA P-521 verify operations in 3068631us (404.1 ops/sec)
After:
Did 23310 ECDSA P-224 verify operations in 3056226us (7627.1 ops/sec)
Did 21210 ECDSA P-256 verify operations in 3035765us (6986.7 ops/sec)
Did 2666 ECDSA P-384 verify operations in 3023592us (881.7 ops/sec)
Did 1209 ECDSA P-521 verify operations in 3054040us (395.9 ops/sec)
Change-Id: Iec995b1a959dbc83049d0f05bdc525c14a95c28e
Reviewed-on: https://boringssl-review.googlesource.com/23077
Reviewed-by: Adam Langley <agl@google.com>
Hasse's theorem implies at most one subtraction is necessary. This is
still using BIGNUM for now because field elements
(EC_POINT_get_affine_coordinates_GFp) are BIGNUMs.
This gives an additional 2% speedup for signing.
Before:
Did 16000 ECDSA P-224 signing operations in 1064799us (15026.3 ops/sec)
Did 19000 ECDSA P-256 signing operations in 1007839us (18852.2 ops/sec)
Did 1078 ECDSA P-384 signing operations in 1079413us (998.7 ops/sec)
Did 484 ECDSA P-521 signing operations in 1083616us (446.7 ops/sec)
After:
Did 16000 ECDSA P-224 signing operations in 1054918us (15167.1 ops/sec)
Did 20000 ECDSA P-256 signing operations in 1037338us (19280.1 ops/sec)
Did 1045 ECDSA P-384 signing operations in 1049073us (996.1 ops/sec)
Did 484 ECDSA P-521 signing operations in 1085492us (445.9 ops/sec)
Change-Id: I2bfe214f968eca7a8e317928c0f3daf1a14bca90
Reviewed-on: https://boringssl-review.googlesource.com/23076
Reviewed-by: Adam Langley <agl@google.com>
None of the asymmetric crypto we inherented from OpenSSL is
constant-time because of BIGNUM. BIGNUM chops leading zeros off the
front of everything, so we end up leaking information about the first
word, in theory. BIGNUM functions additionally tend to take the full
range of inputs and then call into BN_nnmod at various points.
All our secret values should be acted on in constant-time, but k in
ECDSA is a particularly sensitive value. So, ecdsa_sign_setup, in an
attempt to mitigate the BIGNUM leaks, would add a couple copies of the
order.
This does not work at all. k is used to compute two values: k^-1 and kG.
The first operation when computing k^-1 is to call BN_nnmod if k is out
of range. The entry point to our tuned constant-time curve
implementations is to call BN_nnmod if the scalar has too many bits,
which this causes. The result is both corrections are immediately undone
but cause us to do more variable-time work in the meantime.
Replace all these computations around k with the word-based functions
added in the various preceding CLs. In doing so, replace the BN_mod_mul
calls (which internally call BN_nnmod) with Montgomery reduction. We can
avoid taking k^-1 out of Montgomery form, which combines nicely with
Brian Smith's trick in 3426d10119. Along
the way, we avoid some unnecessary mallocs.
BIGNUM still affects the private key itself, as well as the EC_POINTs.
But this should hopefully be much better now. Also it's 10% faster:
Before:
Did 15000 ECDSA P-224 signing operations in 1069117us (14030.3 ops/sec)
Did 18000 ECDSA P-256 signing operations in 1053908us (17079.3 ops/sec)
Did 1078 ECDSA P-384 signing operations in 1087853us (990.9 ops/sec)
Did 473 ECDSA P-521 signing operations in 1069835us (442.1 ops/sec)
After:
Did 16000 ECDSA P-224 signing operations in 1064799us (15026.3 ops/sec)
Did 19000 ECDSA P-256 signing operations in 1007839us (18852.2 ops/sec)
Did 1078 ECDSA P-384 signing operations in 1079413us (998.7 ops/sec)
Did 484 ECDSA P-521 signing operations in 1083616us (446.7 ops/sec)
Change-Id: I2a25e90fc99dac13c0616d0ea45e125a4bd8cca1
Reviewed-on: https://boringssl-review.googlesource.com/23075
Reviewed-by: Adam Langley <agl@google.com>
Imported from upstream's a78324d95bd4568ce2c3b34bfa1d6f14cddf92ef. I
think the "regression" part of that change is some tweak to BN_usub and
I guess the bn_*_words was to compensate for it, but we may as well
import it. Apparently the loop instruction is terrible.
Before:
Did 39871000 bn_add_words operations in 1000002us (39870920.3 ops/sec)
Did 38621750 bn_sub_words operations in 1000001us (38621711.4 ops/sec)
After:
Did 64012000 bn_add_words operations in 1000007us (64011551.9 ops/sec)
Did 81792250 bn_sub_words operations in 1000002us (81792086.4 ops/sec)
loop sets no flags (even doing the comparison to zero without ZF) while
dec sets all flags but CF, so Andres and I are assuming that because
this prevents Intel from microcoding it to dec/jnz, they otherwise can't
be bothered to add more circuitry since every compiler has internalized
by now to never use loop.
Change-Id: I3927cd1c7b707841bbe9963e3d4afd7ba9bd9b36
Reviewed-on: https://boringssl-review.googlesource.com/23344
Reviewed-by: Adam Langley <agl@google.com>
These allow precomputation of k, but bypass our nonce hardening and also
make it harder to excise BIGNUM. As a bonus, ECDSATest.SignTestVectors
is now actually covering the k^-1 and r computations.
Change-Id: I4c71dae162874a88a182387ac43999be9559ddd7
Reviewed-on: https://boringssl-review.googlesource.com/23074
Reviewed-by: Adam Langley <agl@google.com>
wpa_supplicant appear to be using these.
Change-Id: I1f220cae69162901bcd9452e8daf67379c5e276c
Reviewed-on: https://boringssl-review.googlesource.com/23324
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After much procrastinating, we finally moved Chromium to the new stuff.
We can now delete this. This is a breaking change for
SSL_PRIVATE_KEY_METHOD consumers, but it should be trivial (remove some
unused fields in the struct). I've bumped BORINGSSL_API_VERSION to ease
any multi-sided changes that may be needed.
Change-Id: I9fe562590ad938bcb4fcf9af0fadeff1d48745fb
Reviewed-on: https://boringssl-review.googlesource.com/23224
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(Imported from upstream's c29f83c05f3a3c5641c5ddf054789a29d2163bf3.)
ext was being leaked. Upstream also did some stuff around *x which
wasn't strictly necessary (usually OpenSSL only provides basic
exception safety, not strong exception safety), but ah well.
Change-Id: I52d230990b05501b4cee6deee8dcacba4a926c18
Reviewed-on: https://boringssl-review.googlesource.com/23204
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mem.h for |OPENSSL_cleanse| and bn/internal.h for things like
|bn_less_than_words| and |bn_correct_top|.
Change-Id: I3c447a565dd9e4f18fb2ff5d59f80564b4df8cea
Reviewed-on: https://boringssl-review.googlesource.com/23164
Reviewed-by: Adam Langley <agl@google.com>
Change-Id: I82f92019dccfaf927f7180a5af53c9ffae111861
Reviewed-on: https://boringssl-review.googlesource.com/23145
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Change-Id: Id12ab478b6ba441fb1b6f4c2f9479384fc3fbdb6
Reviewed-on: https://boringssl-review.googlesource.com/23144
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
|EC_POINT_mul| is almost exclusively used with reduced scalars, with
this exception. This comes from consumers following NIST SP 800-56A
section 5.6.2.3.2. (Though all our curves have cofactor one, so this
check isn't useful.)
Add a test for this so we don't accidentally break it.
Change-Id: I42492db38a1ea03acec4febdd7945c8a3933530a
Reviewed-on: https://boringssl-review.googlesource.com/23084
Reviewed-by: Adam Langley <agl@google.com>
We were only running a random subset of TLS 1.3 tests with variants and
let a lot of bugs through as a result.
- HelloRetryRequest-EmptyCookie wasn't actually testing what we were
trying to test.
- The second HelloRetryRequest detection needs tweaks in draft-22.
- The empty HelloRetryRequest logic can't be based on non-empty
extensions in draft-22.
- We weren't sending ChangeCipherSpec correctly in HRR or testing it
right.
- Rework how runner reads ChangeCipherSpec by setting a flag which
affects the next readRecord. This cuts down a lot of cases and works
correctly if the client didn't send early data. (In that case, we
don't flush CCS until EndOfEarlyData and runner deadlocks waiting for
the ChangeCipherSpec to arrive.)
Change-Id: I559c96ea3a8b350067e391941231713c6edb2f78
Reviewed-on: https://boringssl-review.googlesource.com/23125
Reviewed-by: Steven Valdez <svaldez@chromium.org>
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Change-Id: I9da9734625d1d9d2c783830d8b4aecd34f51acc6
Reviewed-on: https://boringssl-review.googlesource.com/23124
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Error paths must always have OPENSSL_PUT_ERROR.
Change-Id: I0ed8c8288484a4ea69ec58317064ad3cd90ddd64
Reviewed-on: https://boringssl-review.googlesource.com/23104
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I still need to revive the original CL, but right now I'm interested in
giving every EC_GROUP an order_mont and having different ownership of
that field between built-in and custom groups is kind of a nuisance. If
I'm going to do that anyway, better to avoid computing the entire
EC_GROUP in one go.
I'm using some manual locking rather than CRYPTO_once here so that it
behaves well in the face of malloc errors. Not that we especially care,
but it was easy to do.
This speeds up our ECDH benchmark a bit which otherwise must construct the
EC_GROUP each time (matching real world usage).
Before:
Did 7619 ECDH P-224 operations in 1003190us (7594.8 ops/sec)
Did 7518 ECDH P-256 operations in 1060844us (7086.8 ops/sec)
Did 572 ECDH P-384 operations in 1055878us (541.7 ops/sec)
Did 264 ECDH P-521 operations in 1062375us (248.5 ops/sec)
After:
Did 8415 ECDH P-224 operations in 1066695us (7888.9 ops/sec)
Did 7952 ECDH P-256 operations in 1022819us (7774.6 ops/sec)
Did 572 ECDH P-384 operations in 1055817us (541.8 ops/sec)
Did 264 ECDH P-521 operations in 1060008us (249.1 ops/sec)
Bug: 20
Change-Id: I7446cd0a69a840551dcc2dfabadde8ee1e3ff3e2
Reviewed-on: https://boringssl-review.googlesource.com/23073
Reviewed-by: Adam Langley <agl@google.com>
Later code will take advantage of these invariants. Enforcing them on
custom curves avoids making them go through a custom codepath.
Change-Id: I23cee72a90c2e4846b41e03e6be26bc3abeb4a45
Reviewed-on: https://boringssl-review.googlesource.com/23072
Reviewed-by: Adam Langley <agl@google.com>
These can be used to invert values in ECDSA. Unlike their BIGNUM
counterparts, the caller is responsible for taking values in and out of
Montgomery domain. This will save some work later on in the ECDSA
computation.
Change-Id: Ib7292900a0fdeedce6cb3e9a9123c94863659043
Reviewed-on: https://boringssl-review.googlesource.com/23071
Reviewed-by: Adam Langley <agl@google.com>
These use the square and multiply functions added earlier.
Change-Id: I723834f9a227a9983b752504a2d7ce0223c43d24
Reviewed-on: https://boringssl-review.googlesource.com/23070
Reviewed-by: Adam Langley <agl@google.com>
bn_from_montgomery_in_place is actually constant-time. It is, of course,
only used by non-constant-time BIGNUM callers, but that will soon be
fixed.
Change-Id: I2b2c9943dc3b8d6a4b5b19a5bc4fa9ebad532bac
Reviewed-on: https://boringssl-review.googlesource.com/23069
Reviewed-by: Adam Langley <agl@google.com>
As part of excising BIGNUM from EC scalars, we will need a "words"
version of BN_mod_mul_montgomery. That, in turn, requires BN_sqr and
BN_mul for cases where we don't have bn_mul_mont.
BN_sqr and BN_mul have a lot of logic in there, with the most complex
cases being not even remotely constant time. Fortunately, those only
apply to RSA-sized numbers, not EC-sized numbers. (With the exception, I
believe, of 32-bit P-521 which just barely exceeds the cutoff.) Imposing
a limit also makes it easier to stack-allocate temporaries (BN_CTX
serves a similar purpose in BIGNUM).
Extract bn_mul_small and bn_sqr_small and test them as part of
bn_tests.txt. Later changes will build on these.
If we end up reusing these functions for RSA in the future (though that
would require tending to the egregiously non-constant-time code in the
no-asm build), we probably want to extract a version where there is an
explicit tmp parameter as in bn_sqr_normal rather than the stack bits.
Change-Id: If414981eefe12d6664ab2f5e991a359534aa7532
Reviewed-on: https://boringssl-review.googlesource.com/23068
Reviewed-by: Adam Langley <agl@google.com>
Also replace a pointless call to bn_mul_words with a memset.
Change-Id: Ief30ddab0e84864561b73fe2776bd0477931cf7f
Reviewed-on: https://boringssl-review.googlesource.com/23066
Reviewed-by: Adam Langley <agl@google.com>
This rewrites the internals with a "words" variant that can avoid
bn_correct_top. It still ultimately calls bn_correct_top as the calling
convention is sadly still BIGNUM, but we can lift that calling
convention out incrementally.
Performance seems to be comparable, if not faster.
Before:
Did 85000 ECDSA P-256 signing operations in 5030401us (16897.3 ops/sec)
Did 34278 ECDSA P-256 verify operations in 5048029us (6790.4 ops/sec)
After:
Did 85000 ECDSA P-256 signing operations in 5021057us (16928.7 ops/sec)
Did 34086 ECDSA P-256 verify operations in 5010416us (6803.0 ops/sec)
Change-Id: I1159746dfcc00726dc3f28396076a354556e6e7d
Reviewed-on: https://boringssl-review.googlesource.com/23065
Reviewed-by: Adam Langley <agl@google.com>
BN_from_montgomery_word doesn't have a constant memory access pattern.
Replace the pointer trick with constant_time_select_w. There is, of
course, still the bn_correct_top leak pervasive in BIGNUM itself.
I wasn't able to measure a performance on RSA operations before or after
this change, but the benchmarks would vary wildly run to run. But one
would assume the logic here is nothing compared to the actual reduction.
Change-Id: Ide761fde3a091a93679f0a803a287aa5d0d4600d
Reviewed-on: https://boringssl-review.googlesource.com/22904
Reviewed-by: Adam Langley <agl@google.com>
We don't currently have test coverage for the order_mont bits (or lack
thereof) for custom curves.
Change-Id: I865d547c783226a5a3d3d203e10b0e59bad36984
Reviewed-on: https://boringssl-review.googlesource.com/23064
Commit-Queue: David Benjamin <davidben@google.com>
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Reviewed-by: Adam Langley <agl@google.com>
Change-Id: Ic859f19edff281334bd6975dd3c3b2931c901021
Reviewed-on: https://boringssl-review.googlesource.com/23044
Reviewed-by: David Benjamin <davidben@google.com>
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The current PR says the sender only skips it during the handshake. Add a
test that we got this right.
Change-Id: Ib27eb942f11d955b8a24e32321efe474037f5254
Reviewed-on: https://boringssl-review.googlesource.com/23024
Reviewed-by: David Benjamin <davidben@google.com>
Reviewed-by: Steven Valdez <svaldez@chromium.org>
Commit-Queue: David Benjamin <davidben@google.com>
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See https://github.com/tlswg/tls13-spec/pull/1083. We misread the
original text spec, but it turns out the original spec text required
senders have version-specific maximum send fragments. The PR fixes this
off-by-one issue. Align with the new spec text uniformly.
This is a wire format change for our existing drafts *only if* records
have padding. We don't currently send padding, so this is fine. Unpadded
records continue to be capped at 2^14 bytes of plaintext (or 2^14+1
bytes of TLSInnerPlaintext structure).
Change-Id: I01017cfd13162504bb163dd59afd74aff0896cc4
Reviewed-on: https://boringssl-review.googlesource.com/23004
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Change-Id: I1a0f264cbfa0eb5d4adac96d0fc24fa342f2b6a3
Reviewed-on: https://boringssl-review.googlesource.com/22946
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Because the handshake returns early, it should query SSL_in_early_data.
Change-Id: I64d4c0e8de753832207d5c198c50d660f87afac6
Reviewed-on: https://boringssl-review.googlesource.com/22945
Reviewed-by: Steven Valdez <svaldez@chromium.org>
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Change-Id: Ie5055d6d1d33690f27cdd978a0aa696307880579
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Reviewed-by: David Benjamin <davidben@google.com>
This introduces a wire change to Experiment2/Experiment3 over 0RTT, however
as there is never going to be a 0RTT deployment with Experiment2/Experiment3,
this is valid.
Change-Id: Id541d195cbc4bbb3df7680ae2a02b53bb8ae3eab
Reviewed-on: https://boringssl-review.googlesource.com/22744
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Change-Id: I76a87ebf2f8be731d6da2381710c1caa60298f6e
Reviewed-on: https://boringssl-review.googlesource.com/22924
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Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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