1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 //go:build amd64 && !purego && gc 6 7 package salsa 8 9 //go:noescape 10 11 // salsa2020XORKeyStream is implemented in salsa20_amd64.s. 12 func salsa2020XORKeyStream(out, in *byte, n uint64, nonce, key *byte) 13 14 // XORKeyStream crypts bytes from in to out using the given key and counters. 15 // In and out must overlap entirely or not at all. Counter 16 // contains the raw salsa20 counter bytes (both nonce and block counter). 17 func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) { 18 if len(in) == 0 { 19 return 20 } 21 _ = out[len(in)-1] 22 salsa2020XORKeyStream(&out[0], &in[0], uint64(len(in)), &counter[0], &key[0]) 23 } 24