spegling av
https://github.com/henrydcase/nobs.git
synced 2024-11-22 15:18:57 +00:00
Kris Kwiatkowski
08f7315b64
* CTR-DRBG doesn't call "NewCipher" for block encryption * Changes API of CTR-DRBG, so that read operation implementes io.Reader Benchmark results: ---------------------- benchmark old ns/op new ns/op delta BenchmarkInit-4 1118 3579 +220.13% BenchmarkRead-4 5343 14589 +173.05% benchmark old allocs new allocs delta BenchmarkInit-4 15 0 -100.00% BenchmarkRead-4 67 0 -100.00% benchmark old bytes new bytes delta BenchmarkInit-4 1824 0 -100.00% BenchmarkRead-4 9488 0 -100.00%
35 rader
1.2 KiB
Go
35 rader
1.2 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build !appengine
|
|
|
|
// Package subtle implements functions that are often useful in cryptographic
|
|
// code but require careful thought to use correctly.
|
|
//
|
|
// This is a mirror of golang.org/x/crypto/internal/subtle.
|
|
package aes
|
|
|
|
import "unsafe"
|
|
|
|
// AnyOverlap reports whether x and y share memory at any (not necessarily
|
|
// corresponding) index. The memory beyond the slice length is ignored.
|
|
func AnyOverlap(x, y []byte) bool {
|
|
return len(x) > 0 && len(y) > 0 &&
|
|
uintptr(unsafe.Pointer(&x[0])) <= uintptr(unsafe.Pointer(&y[len(y)-1])) &&
|
|
uintptr(unsafe.Pointer(&y[0])) <= uintptr(unsafe.Pointer(&x[len(x)-1]))
|
|
}
|
|
|
|
// InexactOverlap reports whether x and y share memory at any non-corresponding
|
|
// index. The memory beyond the slice length is ignored. Note that x and y can
|
|
// have different lengths and still not have any inexact overlap.
|
|
//
|
|
// InexactOverlap can be used to implement the requirements of the crypto/cipher
|
|
// AEAD, Block, BlockMode and Stream interfaces.
|
|
func InexactOverlap(x, y []byte) bool {
|
|
if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] {
|
|
return false
|
|
}
|
|
return AnyOverlap(x, y)
|
|
}
|