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23 lines
628 B
Go
23 lines
628 B
Go
// Copyright 2013 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 ignore
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// +build amd64 amd64p32 arm,!nacl 386
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package rc4
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func xorKeyStream(dst, src *byte, n int, state *[256]uint32, i, j *uint8)
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// XORKeyStream sets dst to the result of XORing src with the key stream.
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// Dst and src must overlap entirely or not at all.
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func (c *Cipher) XORKeyStream(dst, src []byte) {
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if len(src) == 0 {
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return
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}
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// Assert len(dst) >= len(src)
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_ = dst[len(src)-1]
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xorKeyStream(&dst[0], &src[0], len(src), &c.s, &c.i, &c.j)
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}
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