delta/go-git.git/src/crypto/sha1, branch dev.inline

all: make copyright headers consistent with one space after period

2016-11-04T20:46:25+00:00

Continuation of CL 20111.

Change-Id: Ie2f62237e6ec316989c021de9b267cc9d6ee6676
Reviewed-on: https://go-review.googlesource.com/32830
Reviewed-by: Brad Fitzpatrick

crypto/tls: implement countermeasures against CBC padding oracles

2016-10-04T13:21:02+00:00

The aim is to make the decrypt() timing profile constant, irrespective of
the CBC padding length or correctness.  The old algorithm, on valid padding,
would only MAC bytes up to the padding length threshold, making CBC
ciphersuites vulnerable to plaintext recovery attacks as presented in the
"Lucky Thirteen" paper.

The new algorithm Write()s to the MAC all supposed payload, performs a
constant time Sum()---which required implementing a constant time Sum() in
crypto/sha1, see the "Lucky Microseconds" paper---and then Write()s the rest
of the data. This is performed whether the padding is good or not.

This should have no explicit secret-dependent timings, but it does NOT
attempt to normalize memory accesses to prevent cache timing leaks.

Updates #13385

Change-Id: I15d91dc3cc6eefc1d44f317f72ff8feb0a9888f7
Reviewed-on: https://go-review.googlesource.com/18130
Run-TryBot: Russ Cox 
TryBot-Result: Gobot Gobot 
Reviewed-by: Russ Cox

crypto/md5, crypto/sha1, crypto/sha256: add examples for checksumming a file

2016-09-19T17:29:19+00:00

Updates #16360.

Change-Id: I75714d2b5f095fe39fd81edfa6dd9e44d7c44da1
Reviewed-on: https://go-review.googlesource.com/29375
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

crypto/*, runtime: nacl asm fixes

2016-08-22T19:50:41+00:00

Found by vet.

Updates #11041

Change-Id: I5217b3e20c6af435d7500d6bb487b9895efe6605
Reviewed-on: https://go-review.googlesource.com/27493
Run-TryBot: Josh Bleecher Snyder 
Reviewed-by: Ian Lance Taylor

crypto/sha1: fix AVX2 variant on AMD64

2016-05-26T11:34:32+00:00

AVX2 variant reads next blocks while calculating current block.
Avoid reading past the end of data, by switching back to original,
for last blocks.

Fixes #15617.

Change-Id: I04fa2d83f1b47995117c77b4a3d403a7dff594d4
Reviewed-on: https://go-review.googlesource.com/23138
Reviewed-by: Keith Randall 
Run-TryBot: Ilya Tocar 
TryBot-Result: Gobot Gobot

crypto/sha1: disable crashing AVX2 optimizations for now

2016-05-10T16:44:53+00:00

Updates #15617

Change-Id: I2104776f8e789d987b4f2f7f08f2ebe979b747a1
Reviewed-on: https://go-review.googlesource.com/23001
Run-TryBot: Brad Fitzpatrick 
Reviewed-by: Dmitry Vyukov 
Reviewed-by: Minux Ma

crypto/sha1: Add AVX2 version for AMD64

2016-05-06T15:20:49+00:00

name             old time/op    new time/op    delta
Hash8Bytes-48       271ns ± 8%     273ns ± 5%     ~     (p=0.313 n=19+19)
Hash320Bytes-48    1.04µs ± 7%    0.75µs ± 8%  -27.66%  (p=0.000 n=20+20)
Hash1K-48          2.72µs ± 6%    1.75µs ± 6%  -35.79%  (p=0.000 n=19+20)
Hash8K-48          19.9µs ± 7%    11.6µs ± 6%  -41.84%  (p=0.000 n=20+19)

name             old speed      new speed      delta
Hash8Bytes-48    29.5MB/s ± 8%  29.3MB/s ± 5%     ~     (p=0.314 n=19+19)
Hash320Bytes-48   307MB/s ± 7%   424MB/s ± 8%  +38.29%  (p=0.000 n=20+20)
Hash1K-48         377MB/s ± 6%   587MB/s ± 6%  +55.76%  (p=0.000 n=19+20)
Hash8K-48         413MB/s ± 7%   709MB/s ± 6%  +71.85%  (p=0.000 n=20+19)

Change-Id: I2963cf744eeb2e8191d4e4223fbf6f533a7fd405
Reviewed-on: https://go-review.googlesource.com/22607
Run-TryBot: Ilya Tocar 
Reviewed-by: Russ Cox 
Run-TryBot: Russ Cox 
TryBot-Result: Gobot Gobot

crypto/sha1: add s390x assembly implementation

2016-04-22T05:27:51+00:00

Use the compute intermediate message digest (KIMD) instruction
when possible. Adds test to check fallback code path in case
KIMD is not available.

Benchmark changes:
Hash8Bytes  3.4x
Hash1K      9.3x
Hash8K      10.9x

Change-Id: Ibcd71a886dfd7b3822042235b4f4eaa7a148036b
Reviewed-on: https://go-review.googlesource.com/22350
Run-TryBot: Michael Munday 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

all: single space after period.

2016-03-02T00:13:47+00:00

The tree's pretty inconsistent about single space vs double space
after a period in documentation. Make it consistently a single space,
per earlier decisions. This means contributors won't be confused by
misleading precedence.

This CL doesn't use go/doc to parse. It only addresses // comments.
It was generated with:

$ perl -i -npe 's,^(\s*// .+[a-z]\.)  +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.)  +([A-Z])')
$ go test go/doc -update

Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7
Reviewed-on: https://go-review.googlesource.com/20022
Reviewed-by: Rob Pike 
Reviewed-by: Dave Day 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot

all: make copyright headers consistent with one space after period

2016-03-01T23:34:33+00:00

This is a subset of https://golang.org/cl/20022 with only the copyright
header lines, so the next CL will be smaller and more reviewable.

Go policy has been single space after periods in comments for some time.

The copyright header template at:

    https://golang.org/doc/contribute.html#copyright

also uses a single space.

Make them all consistent.

Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0
Reviewed-on: https://go-review.googlesource.com/20111
Run-TryBot: Brad Fitzpatrick 
Reviewed-by: Ian Lance Taylor 
Reviewed-by: Matthew Dempsky 
TryBot-Result: Gobot Gobot