From 66638a4435b5ccd46277019fea58794f04c82deb Mon Sep 17 00:00:00 2001 From: Bert Belder Date: Fri, 21 Sep 2012 18:07:08 +0200 Subject: [PATCH] openssl: disable HT sidechannel attack mitigation It used to be off before. It's extremely unlikely that such an attack would be a viable attack against node. And it makes AES much slower. --- deps/openssl/openssl/crypto/aes/asm/aes-586.pl | 4 ++-- deps/openssl/openssl/crypto/aes/asm/aes-x86_64.pl | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/deps/openssl/openssl/crypto/aes/asm/aes-586.pl b/deps/openssl/openssl/crypto/aes/asm/aes-586.pl index aab40e6f1c..fed3150f83 100755 --- a/deps/openssl/openssl/crypto/aes/asm/aes-586.pl +++ b/deps/openssl/openssl/crypto/aes/asm/aes-586.pl @@ -2054,8 +2054,8 @@ my $mark=&DWP(76+240,"esp"); # copy of aes_key->rounds &test ($s2,15); &jnz (&label("slow_way")); if (!$x86only) { - &bt (&DWP(0,$s0),28); # check for hyper-threading bit - &jc (&label("slow_way")); + #&bt (&DWP(0,$s0),28); # check for hyper-threading bit + #&jc (&label("slow_way")); } # pre-allocate aligned stack frame... &lea ($acc,&DWP(-80-244,"esp")); diff --git a/deps/openssl/openssl/crypto/aes/asm/aes-x86_64.pl b/deps/openssl/openssl/crypto/aes/asm/aes-x86_64.pl index a545e892ae..83aad23546 100755 --- a/deps/openssl/openssl/crypto/aes/asm/aes-x86_64.pl +++ b/deps/openssl/openssl/crypto/aes/asm/aes-x86_64.pl @@ -1674,8 +1674,8 @@ AES_cbc_encrypt: jb .Lcbc_slow_prologue test \$15,%rdx jnz .Lcbc_slow_prologue - bt \$28,%r10d - jc .Lcbc_slow_prologue + #bt \$28,%r10d + #jc .Lcbc_slow_prologue # allocate aligned stack frame... lea -88-248(%rsp),$key