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https://github.com/caddyserver/caddy.git
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6fde3632ef
The vendor/ folder was created with the help of @FiloSottile's gvt and vendorcheck. Any dependencies of Caddy plugins outside this repo are not vendored. We do not remove any unused, vendored packages because vendorcheck -u only checks using the current build configuration; i.e. packages that may be imported by files toggled by build tags of other systems. CI tests have been updated to ignore the vendor/ folder. When Go 1.9 is released, a few of the go commands should be revised to again use ./... as it will ignore the vendor folder by default.
56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of
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// this source code is governed by a BSD-style license that can be found in the
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// LICENSE file.
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// +build !appengine
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package websocket
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import "unsafe"
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const wordSize = int(unsafe.Sizeof(uintptr(0)))
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func maskBytes(key [4]byte, pos int, b []byte) int {
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// Mask one byte at a time for small buffers.
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if len(b) < 2*wordSize {
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for i := range b {
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b[i] ^= key[pos&3]
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pos++
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}
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return pos & 3
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}
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// Mask one byte at a time to word boundary.
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if n := int(uintptr(unsafe.Pointer(&b[0]))) % wordSize; n != 0 {
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n = wordSize - n
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for i := range b[:n] {
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b[i] ^= key[pos&3]
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pos++
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}
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b = b[n:]
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}
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// Create aligned word size key.
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var k [wordSize]byte
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for i := range k {
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k[i] = key[(pos+i)&3]
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}
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kw := *(*uintptr)(unsafe.Pointer(&k))
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// Mask one word at a time.
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n := (len(b) / wordSize) * wordSize
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for i := 0; i < n; i += wordSize {
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*(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&b[0])) + uintptr(i))) ^= kw
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}
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// Mask one byte at a time for remaining bytes.
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b = b[n:]
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for i := range b {
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b[i] ^= key[pos&3]
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pos++
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}
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return pos & 3
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}
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