Filippo Valsorda
e0829623af
const KeySize = 32
const NonceSize = 12
func HChaCha20(key, nonce []byte) ([]byte, error)
type Cipher struct {}
func NewUnauthenticatedCipher(key, nonce []byte) (*Cipher, error)
func (s *Cipher) XORKeyStream(dst, src []byte)
Small performance hit in chacha20poly1305, probably due to the loss
of the Advance API, which we might consider adding later. No new
allocations, thanks to the mid-stack inliner.
name old time/op new time/op delta
Chacha20Poly1305/Open-64-8 1.60µs ± 0% 1.68µs ± 1% +4.94% (p=0.000 n=9+10)
Chacha20Poly1305/Seal-64-8 1.56µs ± 0% 1.64µs ± 1% +5.21% (p=0.000 n=8+10)
Chacha20Poly1305/Open-64-X-8 2.10µs ± 1% 2.22µs ± 1% +5.81% (p=0.000 n=10+10)
Chacha20Poly1305/Seal-64-X-8 2.07µs ± 1% 2.17µs ± 0% +4.88% (p=0.000 n=10+10)
Chacha20Poly1305/Open-1350-8 15.4µs ± 0% 15.7µs ± 1% +1.65% (p=0.000 n=10+10)
Chacha20Poly1305/Seal-1350-8 15.6µs ± 2% 15.9µs ± 1% +1.58% (p=0.028 n=10+9)
Chacha20Poly1305/Open-1350-X-8 16.0µs ± 1% 16.3µs ± 2% +2.00% (p=0.000 n=10+10)
Chacha20Poly1305/Seal-1350-X-8 15.9µs ± 0% 16.3µs ± 1% +1.91% (p=0.000 n=10+8)
Chacha20Poly1305/Open-8192-8 85.6µs ± 0% 86.6µs ± 1% +1.21% (p=0.000 n=10+10)
Chacha20Poly1305/Seal-8192-8 85.7µs ± 0% 86.3µs ± 0% +0.68% (p=0.001 n=9+9)
Chacha20Poly1305/Open-8192-X-8 86.4µs ± 1% 87.1µs ± 1% +0.76% (p=0.035 n=10+9)
Chacha20Poly1305/Seal-8192-X-8 86.0µs ± 0% 87.0µs ± 1% +1.14% (p=0.000 n=9+9)
Updates golang/go#24485
Change-Id: I2ec2ef487a03f013049915d9063751c75a78408b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/185980
Reviewed-by: Michael Munday <mike.munday@ibm.com>
18 lines
461 B
Go
18 lines
461 B
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build go1.11
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// +build !gccgo,!appengine
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package chacha20
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const bufSize = 256
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//go:noescape
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func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
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func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
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xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter)
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}
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