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![Paddy](/assets/img/avatar_default.png)
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
36 lines
1.4 KiB
Go
36 lines
1.4 KiB
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 appengine
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// Package subtle implements functions that are often useful in cryptographic
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// code but require careful thought to use correctly.
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package subtle // import "golang.org/x/crypto/internal/subtle"
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// This is the Google App Engine standard variant based on reflect
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// because the unsafe package and cgo are disallowed.
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import "reflect"
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// AnyOverlap reports whether x and y share memory at any (not necessarily
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// corresponding) index. The memory beyond the slice length is ignored.
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func AnyOverlap(x, y []byte) bool {
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return len(x) > 0 && len(y) > 0 &&
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reflect.ValueOf(&x[0]).Pointer() <= reflect.ValueOf(&y[len(y)-1]).Pointer() &&
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reflect.ValueOf(&y[0]).Pointer() <= reflect.ValueOf(&x[len(x)-1]).Pointer()
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}
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// InexactOverlap reports whether x and y share memory at any non-corresponding
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// index. The memory beyond the slice length is ignored. Note that x and y can
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// have different lengths and still not have any inexact overlap.
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//
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// InexactOverlap can be used to implement the requirements of the crypto/cipher
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// AEAD, Block, BlockMode and Stream interfaces.
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func InexactOverlap(x, y []byte) bool {
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if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] {
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return false
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}
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return AnyOverlap(x, y)
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}
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