1// Copyright 2016 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 5package chacha20 6 7import ( 8 "encoding/hex" 9 "testing" 10) 11 12func TestCore(t *testing.T) { 13 // This is just a smoke test that checks the example from 14 // https://tools.ietf.org/html/rfc7539#section-2.3.2. The 15 // chacha20poly1305 package contains much more extensive tests of this 16 // code. 17 var key [32]byte 18 for i := range key { 19 key[i] = byte(i) 20 } 21 22 var input [16]byte 23 input[0] = 1 24 input[7] = 9 25 input[11] = 0x4a 26 27 var out [64]byte 28 XORKeyStream(out[:], out[:], &input, &key) 29 const expected = "10f1e7e4d13b5915500fdd1fa32071c4c7d1f4c733c068030422aa9ac3d46c4ed2826446079faa0914c2d705d98b02a2b5129cd1de164eb9cbd083e8a2503c4e" 30 if result := hex.EncodeToString(out[:]); result != expected { 31 t.Errorf("wanted %x but got %x", expected, result) 32 } 33} 34