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Author SHA1 Message Date
Andy Polyakov
317be63875 bn/asm/x86_64-mont5.pl: unify gather procedure in hardly used path 
and reorganize/harmonize post-conditions.

Additional hardening following on from CVE-2016-0702

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
 2016-03-01 13:34:22 +00:00
Andy Polyakov
8fc8f486f7 crypto/bn/x86_64-mont5.pl: constant-time gather procedure. 
At the same time remove miniscule bias in final subtraction.
Performance penalty varies from platform to platform, and even with
key length. For rsa2048 sign it was observed to be 4% for Sandy
Bridge and 7% on Broadwell.

CVE-2016-0702

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
 2016-03-01 13:34:22 +00:00
Andy Polyakov
b974943234 x86_64 assembly pack: tune clang version detection even further. 
RT#4171

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
 2015-12-13 22:18:18 +01:00
Andy Polyakov
76eba0d94b x86_64 assembly pack: tune clang version detection. 
RT#4142

Reviewed-by: Richard Levitte <levitte@openssl.org>
 2015-11-23 16:00:06 +01:00
Andy Polyakov
569e2d1257 crypto/bn/asm/x86_64-mont*.pl: add missing clang detection. 
Reviewed-by: Rich Salz <rsalz@openssl.org>
 2014-09-12 00:44:51 +02:00
Andy Polyakov
1b0fe79f3e x86_64 assembly pack: improve masm support. 2014-07-09 20:08:01 +02:00
Andy Polyakov
ec9cc70f72 bn/asm/x86_64-mont5.pl: add MULX/AD*X code path. 
This also eliminates code duplication between x86_64-mont and x86_64-mont
and optimizes even original non-MULX code.
 2013-12-09 21:02:24 +01:00
Andy Polyakov
4eeb750d20 bn/asm/x86_64-mont.pl: minor optimization [for Decoded ICache]. 2013-10-25 10:14:20 +02:00
Andy Polyakov
30b9c2348d bn/asm/*x86_64*.pl: correct assembler requirement for ad*x. 2013-10-14 22:41:00 +02:00
Andy Polyakov
a5bb5bca52 bn/asm/x86_64-mont*.pl: add MULX/ADCX/ADOX code path. 2013-10-03 00:45:04 +02:00
Andy Polyakov
72a158703b crypto/bn/asm/x86_64-mont.pl: minor optimization. 2013-09-09 21:40:33 +02:00
Andy Polyakov
26e43b48a3 bn/asm/x86_86-mont.pl: optimize reduction for Intel Core family. 2013-07-05 21:10:56 +02:00
Andy Polyakov
4568182a8b x86_64 assembly pack: keep making Windows build more robust. 
PR: 2963 and a number of others
 2013-02-02 19:54:59 +01:00
Andy Polyakov
6251989eb6 x86_64 assembly pack: make it possible to compile with Perl located on 
path with spaces.

PR: 2835
 2012-06-27 10:08:23 +00:00
Andy Polyakov
3f66f2040a x86_64-mont.pl: minor optimization. 2011-10-17 17:39:59 +00:00
Andy Polyakov
361512da0d This commit completes recent modular exponentiation optimizations on 
x86_64 platform. It targets specifically RSA1024 sign (using ideas
from http://eprint.iacr.org/2011/239) and adds more than 10% on most
platforms. Overall performance improvement relative to 1.0.0 is ~40%
in average, with best result of 54% on Westmere. Incidentally ~40%
is average improvement even for longer key lengths.
 2011-08-12 16:44:32 +00:00
Andy Polyakov
85ec54a417 x86_64-mont.pl: futher optimization resulting in up to 48% improvement 
(4096-bit RSA sign benchmark on Core2) in comparison to initial version
from 2005.
 2011-08-09 13:05:05 +00:00
Andy Polyakov
6179f06077 x86_64-mont.pl: add squaring procedure and improve RSA sign performance 
by up to 38% (4096-bit benchmark on Core2).
 2011-07-05 09:21:03 +00:00
Andy Polyakov
3efe51a407 Revert previous Linux-specific/centric commit#19629. If it really has to 
be done, it's definitely not the way to do it. So far answer to the
question was to ./config -Wa,--noexecstack (adopted by RedHat).
 2010-05-05 22:05:39 +00:00
Ben Laurie
0e3ef596e5 Non-executable stack in asm. 2010-05-05 15:50:13 +00:00
Andy Polyakov
be01f79d3d x86_64 assembler pack: add support for Win64 SEH. 2008-12-19 11:17:29 +00:00
Andy Polyakov
61b05a0025 Make x86_64-mont.pl work with debug Win64 build. 2008-02-27 20:09:28 +00:00
Andy Polyakov
673c55a2fe Latest bn_mont.c modification broke ECDSA test. I've got math wrong, which 
is fixed now.
 2007-06-29 13:10:19 +00:00
Andy Polyakov
5b89f78a89 Typo in x86_64-mont.pl. 
PR: 1549
 2007-06-21 11:38:52 +00:00
Andy Polyakov
7d9cf7c0bb Eliminate conditional final subtraction in Montgomery assembler modules. 2007-06-17 17:10:03 +00:00
Andy Polyakov
7321a84d4c Minor clean-up in crypto/bn/asm. 2006-12-29 11:05:20 +00:00
Andy Polyakov
d28134b8f3 Minor, +10%, tune-up for x86_64-mont.pl. 2006-12-08 10:13:51 +00:00
Andy Polyakov
4d524040bc Change bn_mul_mont declaration and BN_MONT_CTX. Update CHANGES. 2005-10-22 17:57:18 +00:00
Andy Polyakov
7a2f4cbfe8 x86_64-mont.pl readability improvement. 2005-10-07 15:18:16 +00:00
Andy Polyakov
5ac7bde7c9 Throw in Montgomery multiplication assembler for x86_64. 2005-10-07 14:18:06 +00:00