Commit Graph

173 Commits

Author SHA1 Message Date
David Benjamin
6d218d6d7a Remove unused function.
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>
2017-11-20 18:32:44 +00:00
David Benjamin
0a5f006736 Test that EC_POINT_mul works with the order.
|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>
2017-11-20 18:32:30 +00:00
David Benjamin
b8d677bfd0 Deduplicate built-in curves and give custom curves an order_mont.
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>
2017-11-20 16:52:03 +00:00
David Benjamin
66f8235510 Enforce some bounds and invariants on custom curves.
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>
2017-11-20 16:27:51 +00:00
David Benjamin
a08bba51a5 Add bn_mod_exp_mont_small and bn_mod_inverse_prime_mont_small.
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>
2017-11-20 16:23:48 +00:00
David Benjamin
40e4ecb793 Add "small" variants of Montgomery logic.
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>
2017-11-20 16:23:01 +00:00
David Benjamin
a01aa9aa9f Split BN_from_montgomery_word into a non-BIGNUM core.
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>
2017-11-20 16:22:43 +00:00
David Benjamin
6bc18a3bd4 Add bn_mul_small and bn_sqr_small.
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>
2017-11-20 16:22:30 +00:00
David Benjamin
64619deaa3 Const-correct some of the low-level BIGNUM functions.
Change-Id: I8c6257e336f54a3a1786df9c4103fcf29177030a
Reviewed-on: https://boringssl-review.googlesource.com/23067
Reviewed-by: Adam Langley <agl@google.com>
2017-11-20 16:20:40 +00:00
David Benjamin
bd275702d2 size_t a bunch of bn words bits.
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>
2017-11-20 16:20:28 +00:00
David Benjamin
73df153be8 Make BN_generate_dsa_nonce internally constant-time.
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>
2017-11-20 16:18:30 +00:00
David Benjamin
b25140c7b6 Fix timing leak in BN_from_montgomery_word.
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>
2017-11-20 16:18:09 +00:00
David Benjamin
8db94be1d6 Add ECDSA tests for custom curves.
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>
2017-11-17 12:18:16 +00:00
David Benjamin
a00fd08c2c Use consistent notation in ECDSA_do_verify comments.
Change-Id: Ia0cec71b5f8a6b7f03681b92cfacee13b2a74621
Reviewed-on: https://boringssl-review.googlesource.com/22890
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:44:01 +00:00
David Benjamin
d66bbf3413 Tidy up BN_mod_exp_mont.
This was primarily for my own understanding, but this should hopefully
also be clearer and more amenable to using unsigned indices later.

Change-Id: I09cc3d55de0f7d9284d3b3168d8b0446274b2ab7
Reviewed-on: https://boringssl-review.googlesource.com/22889
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:43:54 +00:00
David Benjamin
607f9807e5 Remove BN_TBIT.
Normal shifts do the trick just fine and are less likely to tempt the
compiler into inserting a jump.

Change-Id: Iaa1da1b6f986fd447694fcde8f3525efb9eeaf11
Reviewed-on: https://boringssl-review.googlesource.com/22888
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:43:37 +00:00
David Benjamin
bf3f6caaf3 Document some BIGNUM internals.
Change-Id: I8f044febf16afe04da8b176c638111a9574c4d02
Reviewed-on: https://boringssl-review.googlesource.com/22887
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:43:13 +00:00
David Benjamin
0a9222b824 Fix comment typo.
Change-Id: I482093000ee2e4ba371c78b4f7f8e8b121e71640
Reviewed-on: https://boringssl-review.googlesource.com/22886
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:22:42 +00:00
David Benjamin
238c274054 Capitalization nit.
We capitalize things Go-style.

Change-Id: Id002efb8a85e4e1886164421bba059d9ca425964
Reviewed-on: https://boringssl-review.googlesource.com/22885
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 22:22:35 +00:00
David Benjamin
6aedfc137b Remove unnecessary loop over BN_generate_dsa_nonce.
BN_generate_dsa_nonce will never generate a zero value of k.

Change-Id: I06964b815bc82aa678ffbc80664f9d788cf3851d
Reviewed-on: https://boringssl-review.googlesource.com/22884
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
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2017-11-10 22:20:47 +00:00
David Benjamin
896332581e Appease UBSan on pointer alignment.
Even without strict-aliasing, C does not allow casting pointers to types
that don't match their alignment. After this change, UBSan is happy with
our code at default settings but for the negative left shift language
bug.

Note: architectures without unaligned loads do not generate the same
code for memcpy and pointer casts. But even ARMv6 can perform unaligned
loads and stores (ARMv5 couldn't), so we should be okay here.

Before:
Did 11086000 AES-128-GCM (16 bytes) seal operations in 5000391us (2217026.6 ops/sec): 35.5 MB/s
Did 370000 AES-128-GCM (1350 bytes) seal operations in 5005208us (73923.0 ops/sec): 99.8 MB/s
Did 63000 AES-128-GCM (8192 bytes) seal operations in 5029958us (12525.0 ops/sec): 102.6 MB/s
Did 9894000 AES-256-GCM (16 bytes) seal operations in 5000017us (1978793.3 ops/sec): 31.7 MB/s
Did 316000 AES-256-GCM (1350 bytes) seal operations in 5005564us (63129.7 ops/sec): 85.2 MB/s
Did 54000 AES-256-GCM (8192 bytes) seal operations in 5054156us (10684.3 ops/sec): 87.5 MB/s

After:
Did 11026000 AES-128-GCM (16 bytes) seal operations in 5000197us (2205113.1 ops/sec): 35.3 MB/s
Did 370000 AES-128-GCM (1350 bytes) seal operations in 5005781us (73914.5 ops/sec): 99.8 MB/s
Did 63000 AES-128-GCM (8192 bytes) seal operations in 5032695us (12518.1 ops/sec): 102.5 MB/s
Did 9831750 AES-256-GCM (16 bytes) seal operations in 5000010us (1966346.1 ops/sec): 31.5 MB/s
Did 316000 AES-256-GCM (1350 bytes) seal operations in 5005702us (63128.0 ops/sec): 85.2 MB/s
Did 54000 AES-256-GCM (8192 bytes) seal operations in 5053642us (10685.4 ops/sec): 87.5 MB/s

(Tested with the no-asm builds; most of this code isn't reachable
otherwise.)

Change-Id: I025c365d26491abed0116b0de3b7612159e52297
Reviewed-on: https://boringssl-review.googlesource.com/22804
Reviewed-by: Adam Langley <agl@google.com>
2017-11-10 21:07:03 +00:00
Adam Langley
0967853d68 Add CFI start/end for _aesni_ctr32[_ghash]_6x
These functions don't appear to do any stack manipulation thus all they
need are start/end directives in order for the correct CFI tables to be
emitted.

Change-Id: I4c94a9446030d363fa4bcb7c8975c689df3d21dc
Reviewed-on: https://boringssl-review.googlesource.com/22765
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
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2017-11-09 00:31:14 +00:00
Adam Langley
ee2c1f3e68 aesni-gcm-x86_64.pl: sync CFI directives from upstream.
Change-Id: Id70cfc78c8d103117d4c2195206b023a5d51edc3
Reviewed-on: https://boringssl-review.googlesource.com/22764
Commit-Queue: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
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2017-11-09 00:18:23 +00:00
David Benjamin
b8e2d6327a es/asm/{aes-armv4|bsaes-armv7}.pl: make it work with binutils-2.29.
It's not clear if it's a feature or bug, but binutils-2.29[.1]
interprets 'adr' instruction with Thumb2 code reference differently,
in a way that affects calculation of addresses of constants' tables.

(Imported from upstream's b82acc3c1a7f304c9df31841753a0fa76b5b3cda.)

Change-Id: Ia0f5233a9fcfaf18b9d1164bf1c88217c0cbb60d
Reviewed-on: https://boringssl-review.googlesource.com/22724
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
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2017-11-08 16:53:04 +00:00
Daniel Hirche
d5dda9b803 Align |BN_div| with its documentation.
Change-Id: Idd0dc9dafb4ea9adbf22257018138c49f7980fee
Reviewed-on: https://boringssl-review.googlesource.com/22604
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
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2017-11-06 22:55:30 +00:00
David Benjamin
55761e6802 Use a higher iteration limit for RSA key generation at e = 3.
Generating a 2048-bit RSA key with e = 3 (don't do this), the failure
rate at 5*bits iterations appears to be around 7 failures in 1000 tries.
Bump the limit up to 32*bits. This should give a failure rate of around
2 failures in 10^14 tries.

(The FIPS 186-4 algorithm is meant for saner values of e, like 65537. e
= 3 implies a restrictive GCD requirement: the primes must both be 2 mod
3.)

Change-Id: Icd373f61e2eb90df5afaff9a0fc2b2fbb6ec3f0a
Reviewed-on: https://boringssl-review.googlesource.com/22584
Commit-Queue: David Benjamin <davidben@google.com>
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2017-11-03 19:37:31 +00:00
Daniel Hirche
2eb2889702 bn/exp: don't check |copy_to_prebuf|'s retval in |BN_mod_exp_mont_consttime|.
It always returns one, so just void it.

Change-Id: I8733cc3d6b20185e782cf0291e9c0dc57712bb63
Reviewed-on: https://boringssl-review.googlesource.com/22564
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
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2017-11-03 15:43:52 +00:00
David Benjamin
a02ed04d52 Add more compatibility symbols for Node.
Change-Id: Iaeff3adc6da216e965126eaa181427d5318f07d5
Reviewed-on: https://boringssl-review.googlesource.com/22544
Commit-Queue: Adam Langley <agl@google.com>
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2017-11-03 01:31:50 +00:00
David Benjamin
2d07d30c44 bn/asm/x86_64-mont5.pl: fix carry bug in bn_sqrx8x_internal.
Credit to OSS-Fuzz for finding this.

CVE-2017-3736

(Imported from upstream's 668a709a8d7ea374ee72ad2d43ac72ec60a80eee and
420b88cec8c6f7c67fad07bf508dcccab094f134.)

This bug does not affect BoringSSL as we do not enable the ADX code.
Note the test vector had to be tweaked to take things in and out of
Montgomery form. (There may be something to be said for test vectors for
just BN_mod_mul_montgomery, though we'd need separate 64-bit and 32-bit
ones because R can be different.)

Change-Id: I832070731ac1c5f893f9c1746892fc4a32f023f5
Reviewed-on: https://boringssl-review.googlesource.com/22484
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2017-11-02 17:07:57 +00:00
David Benjamin
4281bcd5d2 Revert assembly changes in "Hide CPU capability symbols in C."
This partially reverts commit 38636aba74.
Some build on Android seems to break now. I'm not really sure what the
situation is, but if the weird common symbols are still there (can we
remove them?), they probably ought to have the right flags.

Change-Id: Ief589d763d16b995ac6be536505acf7596a87b30
Reviewed-on: https://boringssl-review.googlesource.com/22404
Commit-Queue: David Benjamin <davidben@google.com>
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2017-10-30 20:39:57 +00:00
David Benjamin
8f06074a91 Handle malloc failures better in bn_test.cc.
Those EXPECTs should be ASSERTs to ensure bn is not null.

Change-Id: Icb54c242ffbde5f8eaa67f19f214c9eef13705ea
Reviewed-on: https://boringssl-review.googlesource.com/22366
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2017-10-30 18:53:48 +00:00
David Benjamin
cb16f17b36 Check EC_POINT/EC_GROUP compatibility more accurately.
Currently we only check that the underlying EC_METHODs match, which
avoids the points being in different forms, but not that the points are
on the same curves. (We fixed the APIs early on so off-curve EC_POINTs
cannot be created.)

In particular, this comes up with folks implementating Java's crypto
APIs with ECDH_compute_key. These APIs are both unfortunate and should
not be mimicked, as they allow folks to mismatch the groups on the two
multiple EC_POINTs. Instead, ECDH APIs should take the public value as a
byte string.

Thanks also to Java's poor crypto APIs, we must support custom curves,
which makes this particularly gnarly. This CL makes EC_GROUP_cmp work
with custom curves and adds an additional subtle requirement to
EC_GROUP_set_generator.

Annoyingly, this change is additionally subtle because we now have a
reference cycle to hack around.

Change-Id: I2efbc4bd5cb65fee5f66527bd6ccad6b9d5120b9
Reviewed-on: https://boringssl-review.googlesource.com/22245
Reviewed-by: Adam Langley <agl@google.com>
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2017-10-28 08:02:50 +00:00
David Benjamin
af92418b8b Generate bn_div and bn_mod_exp corpus from bn_tests.txt.
Also switch them to accepting a u16 length prefix. We appear not to have
any such tests right now, but RSA-2048 would involve modulus well larger
and primes just a hair larger than a u8 length prefix alows.

Change-Id: Icce8f1d976e159b945302fbba732e72913c7b724
Reviewed-on: https://boringssl-review.googlesource.com/22284
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2017-10-27 18:57:48 +00:00
David Benjamin
51073ce055 Refcount EC_GROUP.
I really need to resurrect the CL to make them entirely static
(https://crbug.com/boringssl/20), but, in the meantime, to make
replacing the EC_METHOD pointer in EC_POINT with EC_GROUP not
*completely* insane, make them refcounted.

OpenSSL did not do this because their EC_GROUPs are mutable
(EC_GROUP_set_asn1_flag and EC_GROUP_set_point_conversion_form). Ours
are immutable but for the two-function dance around custom curves (more
of OpenSSL's habit of making their objects too complex), which is good
enough to refcount.

Change-Id: I3650993737a97da0ddcf0e5fb7a15876e724cadc
Reviewed-on: https://boringssl-review.googlesource.com/22244
Reviewed-by: Adam Langley <agl@google.com>
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2017-10-27 17:48:27 +00:00
David Benjamin
d24fd47ff4 Fold EC_POINT_clear_free into EC_POINT_free.
All frees zero memory now.

Change-Id: I5b04a0d14f38d5a7422e148d077fcba85a593594
Reviewed-on: https://boringssl-review.googlesource.com/22225
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2017-10-27 17:41:19 +00:00
David Benjamin
fed560ff2a Clear no-op BN_MASK2 masks.
This is an OpenSSL thing to support platforms where BN_ULONG is not
actually the size it claims to be. We define BN_ULONG to uint32_t and
uint64_t which are guaranteed by C to implement arithemetic modulo 2^32
and 2^64, respectively. Thus there is no need for any of this.

Change-Id: I098cd4cc050a136b9f2c091dfbc28dd83e01f531
Reviewed-on: https://boringssl-review.googlesource.com/21784
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2017-10-27 02:38:45 +00:00
David Benjamin
cba7987978 Revert "Use uint128_t and __asm__ in clang-cl."
This reverts commit f6942f0d22.

Reason for revert: This doesn't actually work in clang-cl. I
forgot we didn't have the clang-cl try bots enabled! :-( I
believe __asm__ is still okay, but I'll try it by hand
tomorrow.

Original change's description:
> Use uint128_t and __asm__ in clang-cl.
> 
> clang-cl does not define __GNUC__ but is still a functioning clang. We
> should be able to use our uint128_t and __asm__ code in it on Windows.
> 
> Change-Id: I67310ee68baa0c0c947b2441c265b019ef12af7e
> Reviewed-on: https://boringssl-review.googlesource.com/22184
> 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>

TBR=agl@google.com,davidben@google.com

Change-Id: I5c7e0391cd9c2e8cc0dfde37e174edaf5d17db22
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://boringssl-review.googlesource.com/22224
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>
2017-10-27 00:22:06 +00:00
David Benjamin
f6942f0d22 Use uint128_t and __asm__ in clang-cl.
clang-cl does not define __GNUC__ but is still a functioning clang. We
should be able to use our uint128_t and __asm__ code in it on Windows.

Change-Id: I67310ee68baa0c0c947b2441c265b019ef12af7e
Reviewed-on: https://boringssl-review.googlesource.com/22184
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>
2017-10-27 00:07:29 +00:00
David Benjamin
a37f286f4e Remove the buggy RSA parser.
I've left EVP_set_buggy_rsa_parser as a no-op stub for now, but it
shouldn't need to last very long. (Just waiting for a CL to land in a
consumer.)

Bug: chromium:735616
Change-Id: I6426588f84dd0803661a79c6636a0414f4e98855
Reviewed-on: https://boringssl-review.googlesource.com/22124
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2017-10-24 17:39:46 +00:00
David Benjamin
38636aba74 Hide CPU capability symbols in C.
Our assembly does not use the GOT to reference symbols, which means
references to visible symbols will often require a TEXTREL. This is
undesirable, so all assembly-referenced symbols should be hidden. CPU
capabilities are the only such symbols defined in C.

These symbols may be hidden by doing at least one of:

1. Build with -fvisibility=hidden
2. __attribute__((visibility("hidden"))) in C.
3. .extern + .hidden in some assembly file referencing the symbol.

We have lots of consumers and can't always rely on (1) happening. We
were doing (3) by way of d216b71f90 and
16e38b2b8f, but missed 32-bit x86 because
it doesn't cause a linker error.

Those two patches are not in upstream. Upstream instead does (3) by way
of x86cpuid.pl and friends, but we have none of these files.

Standardize on doing (2). This avoids accidentally getting TEXTRELs on
some 32-bit x86 build configurations.  This also undoes
d216b71f90 and
16e38b2b8f. They are no now longer needed
and reduce the upstream diff.

Change-Id: Ib51c43fce6a7d8292533635e5d85d3c197a93644
Reviewed-on: https://boringssl-review.googlesource.com/22064
Commit-Queue: Matt Braithwaite <mab@google.com>
Reviewed-by: Matt Braithwaite <mab@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2017-10-23 18:36:49 +00:00
David Benjamin
e7136a978f Fix sha1.c's preprocessor checks.
sha1-altivec.c is not sensitive to OPENSSL_NO_ASM, so sha1.c needs to
disable the generic implementation accordingly.

Bug: 204
Change-Id: Ic655f8b76907f07da33afa863d1b24d62d42e23a
Reviewed-on: https://boringssl-review.googlesource.com/21064
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>
2017-10-03 22:24:34 +00:00
David Benjamin
81f030b106 Switch OPENSSL_VERSION_NUMBER to 1.1.0.
Although we are derived from 1.0.2, we mimic 1.1.0 in some ways around
our FOO_up_ref functions and opaque libssl types. This causes some
difficulties when porting third-party code as any OPENSSL_VERSION_NUMBER
checks for 1.1.0 APIs we have will be wrong.

Moreover, adding accessors without changing OPENSSL_VERSION_NUMBER can
break external projects. It is common to implement a compatibility
version of an accessor under #ifdef as a static function. This then
conflicts with our headers if we, unlike OpenSSL 1.0.2, have this
function.

This change switches OPENSSL_VERSION_NUMBER to 1.1.0 and atomically adds
enough accessors for software with 1.1.0 support already. The hope is
this will unblock hiding SSL_CTX and SSL_SESSION, which will be
especially useful with C++-ficiation. The cost is we will hit some
growing pains as more 1.1.0 consumers enter the ecosystem and we
converge on the right set of APIs to import from upstream.

It does not remove any 1.0.2 APIs, so we will not require that all
projects support 1.1.0. The exception is APIs which changed in 1.1.0 but
did not change the function signature. Those are breaking changes.
Specifically:

- SSL_CTX_sess_set_get_cb is now const-correct.

- X509_get0_signature is now const-correct.

For C++ consumers only, this change temporarily includes an overload
hack for SSL_CTX_sess_set_get_cb that keeps the old callback working.
This is a workaround for Node not yet supporting OpenSSL 1.1.0.

The version number is set at (the as yet unreleased) 1.1.0g to denote
that this change includes https://github.com/openssl/openssl/pull/4384.

Bug: 91
Change-Id: I5eeb27448a6db4c25c244afac37f9604d9608a76
Reviewed-on: https://boringssl-review.googlesource.com/10340
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>
2017-09-29 04:51:27 +00:00
Vincent Batts
60931e2d8a Explicit fallthrough on switch
Fixes failed compile with [-Werror=implicit-fallthrough=], which is
default on gcc-7.x on distributions like fedora.

Enabling no implicit fallthrough for more than just clang as well to
catch this going forward.

Change-Id: I6cd880dac70ec126bd7812e2d9e5ff804d32cadd
Signed-off-by: Vincent Batts <vbatts@redhat.com>
Reviewed-on: https://boringssl-review.googlesource.com/20564
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2017-09-20 19:58:25 +00:00
Adam Langley
6b35262272 Maintain EVP_MD_CTX invariants.
Thanks to Lennart Beringer for pointing that that malloc failures could
lead to invalid EVP_MD_CTX states. This change cleans up the code in
general so that fallible operations are all performed before mutating
objects. Thus failures should leave objects in a valid state.

Also, |ctx_size| is never zero and a hash with no context is not
sensible, so stop handling that case and simply assert that it doesn't
occur.

Change-Id: Ia60c3796dcf2f772f55e12e49431af6475f64d52
Reviewed-on: https://boringssl-review.googlesource.com/20544
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
2017-09-20 18:43:21 +00:00
David Benjamin
f231d6bfa6 Remove CTR_DRBG_STATE alignment marker.
We don't get up to 16-byte alignment without additional work like
https://boringssl-review.googlesource.com/20204. This just makes UBSan
unhappy at us.

Change-Id: I55d9cb5b40e5177c3c7aac7828c1d22f2bfda9a6
Reviewed-on: https://boringssl-review.googlesource.com/20464
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>
2017-09-18 19:17:52 +00:00
Martin Kreichgauer
6dc892fcdf Remove redundant calls to |OPENSSL_cleanse| and |OPENSSL_realloc_clean|.
Change-Id: I5c85c4d072ec157b37ed95b284a26ab32c0c42d9
Reviewed-on: https://boringssl-review.googlesource.com/19824
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2017-09-18 19:16:51 +00:00
Peter Wu
2c46c10631 Fix build when linux-headers are not installed.
linux/random.h is not really needed if FIPS mode is not enabled. Note
that use of the getrandom syscall is unaffected by this header.

Fixes commit bc7daec4d8

Change-Id: Ia367aeffb3f2802ba97fd1507de0b718d9ac2c55
Reviewed-on: https://boringssl-review.googlesource.com/19644
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>
2017-08-24 00:35:05 +00:00
David Benjamin
7cc3f4fce0 Use __asm__ instead of asm.
One less macro to worry about in bcm.c.

Change-Id: I321084c0d4ed1bec38c541b04f5b3468350c6eaa
Reviewed-on: https://boringssl-review.googlesource.com/19565
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>
2017-08-18 23:43:11 +00:00
David Benjamin
808f832917 Run the comment converter on libcrypto.
crypto/{asn1,x509,x509v3,pem} were skipped as they are still OpenSSL
style.

Change-Id: I3cd9a60e1cb483a981aca325041f3fbce294247c
Reviewed-on: https://boringssl-review.googlesource.com/19504
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2017-08-18 21:49:04 +00:00
David Benjamin
331d2cee0a Rename mont_data to order_mont.
It's confusing to have both mont and mont_data on EC_GROUP. The
documentation was also wrong.

Change-Id: I4e2e3169ed79307018212fba51d015bbbe5c4227
Reviewed-on: https://boringssl-review.googlesource.com/10348
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
2017-08-18 00:17:21 +00:00