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