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5 Commits
Author SHA1 Message Date
Conrado P. L. Gouvea 22d7a77e9e sha3: fix bug in cSHAKE Clone() 
Clone() made a copy of the Keccak state after invoking clone(), which is not
supported, since the "buf" slice in the Keccak state must point to the "storage"
array, and if the state is copied directly it will keep pointing to the storage
returned by clone().

Fix it by embedding a pointer to the Keccak state instead of the state itself.

Change-Id: I7d392963ec65d784a360f6c12a7935a9a9a788b5
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/173018
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2019-05-13 17:29:03 +00:00
Kris Kwiatkowski f416ebab96 sha3: add cSHAKE support 
This patch implements 128- and 256-bit version of customizable variant
of SHAKE function (cSHAKE).

* Implementation based on NIST FIPS 202
* Test data file has been updated with cSHAKE KATs. I've copied
  examples from NIST document available here:
  https://csrc.nist.gov/csrc/media/projects/cryptographic-standards-and
  -guidelines/documents/examples/cshake_samples.pdf

Fixes #25395

Change-Id: Icbbc4232f3d9a28b3d6ead51937c2e60c00e5d8c
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/111281
Reviewed-by: Filippo Valsorda <filippo@golang.org>
 2019-04-17 17:40:47 +00:00
Michael Munday dccd99e89d sha3: add optimized implementation for s390x 
Message-security-assist extension 6 adds support for the SHA-3 and
SHAKE algorithms. This CL allows the sha3 package to use these new
features.

name                 old speed     new speed      delta
PermutationFunction  328MB/s ± 0%   385MB/s ± 0%    +17.28%  (p=0.000 n=9+10)
Sha3_512_MTU         108MB/s ± 0%  2011MB/s ± 0%  +1768.56%  (p=0.000 n=10+10)
Sha3_384_MTU         149MB/s ± 0%  2437MB/s ± 0%  +1534.22%  (p=0.000 n=10+10)
Sha3_256_MTU         185MB/s ± 0%  2739MB/s ± 0%  +1379.93%  (p=0.000 n=10+10)
Sha3_224_MTU         195MB/s ± 0%  2782MB/s ± 0%  +1326.05%  (p=0.000 n=10+10)
Shake128_MTU         225MB/s ± 0%  4436MB/s ± 0%  +1873.18%  (p=0.000 n=9+9)
Shake256_MTU         209MB/s ± 0%  4521MB/s ± 0%  +2059.86%  (p=0.000 n=8+10)
Shake256_16x         188MB/s ± 0%  1366MB/s ± 0%   +624.70%  (p=0.000 n=9+10)
Shake256_1MiB        212MB/s ± 0%  5861MB/s ± 0%  +2666.67%  (p=0.000 n=10+10)
Sha3_512_1MiB        116MB/s ± 0%  4328MB/s ± 0%  +3628.33%  (p=0.000 n=10+10)

Change-Id: I8ebc503ca2b9eda2ebb361dffdbfe79dd97e1975
Reviewed-on: https://go-review.googlesource.com/59391
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-04-26 18:01:11 +00:00
Kyle Spiers 182114d582 sha3: fix typo in Shake256 docs 
Change-Id: I1d8d1016a956bf185d3a5af76188b8287fce6391
Reviewed-on: https://go-review.googlesource.com/100195
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-03-12 19:55:33 +00:00
David Leon Gil 1b32d8b50a go.crypto/sha3: update to sync with draft FIPS-202 
1. API:

This exposes a minimal API: the SHA-3 functions implement hash.Hash. The
SHAKE functions implement a new "ShakeHash" interface that implements
io.Reader, io.Writer, and Reset().

(The previous Barrier() function has been removed.)

(Alternative proposal: Don't implement io.Reader, but instead provide a
"Digest(d []byte) error" function that performs a hash.Hash style copy.
Somewhat more minimal, but very easy to use incorrectly.)

2. Tests

Added the complete set of ShortMsgKATs from
   https://github.com/gvanas/KeccakCodePackage

3. Correctness

In sync with draft FIPS-202.

4. Documentation

A summary of the security properties of the SHA-3 and SHAKE functions is
provided in doc.go; some concrete recommendations as well.

Fixes 8563.

R=golang-codereviews, agl
CC=golang-codereviews
https://golang.org/cl/130950043
 2014-09-03 12:04:00 -07:00