libgo/go/golang_org/x/crypto/chacha20poly1305/internal/chacha20/chacha_test.go

   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
   5 package chacha20
   6
   7 import (
   8         "encoding/hex"
   9         "testing"
  10 )
  11
  12 func 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 }