blob: f1e723848124fd3f9c2d2018070c29c60b7331f8 [file] [log] [blame]
 // Copyright 2018 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. package subtle_test import ( "testing" "crypto/internal/subtle" ) var a, b [100]byte var aliasingTests = []struct { x, y []byte anyOverlap, inexactOverlap bool }{ {a[:], b[:], false, false}, {a[:], b[:0], false, false}, {a[:], b[:50], false, false}, {a[40:50], a[50:60], false, false}, {a[40:50], a[60:70], false, false}, {a[:51], a[50:], true, true}, {a[:], a[:], true, false}, {a[:50], a[:60], true, false}, {a[:], nil, false, false}, {nil, nil, false, false}, {a[:], a[:0], false, false}, {a[:10], a[:10:20], true, false}, {a[:10], a[5:10:20], true, true}, } func testAliasing(t *testing.T, i int, x, y []byte, anyOverlap, inexactOverlap bool) { any := subtle.AnyOverlap(x, y) if any != anyOverlap { t.Errorf("%d: wrong AnyOverlap result, expected %v, got %v", i, anyOverlap, any) } inexact := subtle.InexactOverlap(x, y) if inexact != inexactOverlap { t.Errorf("%d: wrong InexactOverlap result, expected %v, got %v", i, inexactOverlap, any) } } func TestAliasing(t *testing.T) { for i, tt := range aliasingTests { testAliasing(t, i, tt.x, tt.y, tt.anyOverlap, tt.inexactOverlap) testAliasing(t, i, tt.y, tt.x, tt.anyOverlap, tt.inexactOverlap) } }