21 lines
570 B
Go
21 lines
570 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 !amd64,!arm,!386
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package rc4
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// XORKeyStream sets dst to the result of XORing src with the key stream.
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// Dst and src may be the same slice but otherwise should not overlap.
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func (c *Cipher) XORKeyStream(dst, src []byte) {
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i, j := c.i, c.j
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for k, v := range src {
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i += 1
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j += uint8(c.s[i])
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c.s[i], c.s[j] = c.s[j], c.s[i]
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dst[k] = v ^ byte(c.s[byte(c.s[i]+c.s[j])])
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}
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c.i, c.j = i, j
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}
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