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path: root/src/pkg/crypto/rc4/rc4_asm.go
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// Copyright 2013 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 amd64 arm

package rc4

func xorKeyStream(dst, src *byte, n int, state *[256]byte, i, j *uint8)

// XORKeyStream sets dst to the result of XORing src with the key stream.
// Dst and src may be the same slice but otherwise should not overlap.
func (c *Cipher) XORKeyStream(dst, src []byte) {
	if len(src) == 0 {
		return
	}
	xorKeyStream(&dst[0], &src[0], len(src), &c.s, &c.i, &c.j)
}