51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package subtle_test
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import (
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"testing"
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"golang.org/x/crypto/internal/subtle"
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)
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var a, b [100]byte
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var aliasingTests = []struct {
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x, y []byte
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anyOverlap, inexactOverlap bool
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}{
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{a[:], b[:], false, false},
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{a[:], b[:0], false, false},
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{a[:], b[:50], false, false},
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{a[40:50], a[50:60], false, false},
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{a[40:50], a[60:70], false, false},
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{a[:51], a[50:], true, true},
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{a[:], a[:], true, false},
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{a[:50], a[:60], true, false},
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{a[:], nil, false, false},
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{nil, nil, false, false},
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{a[:], a[:0], false, false},
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{a[:10], a[:10:20], true, false},
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{a[:10], a[5:10:20], true, true},
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}
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func testAliasing(t *testing.T, i int, x, y []byte, anyOverlap, inexactOverlap bool) {
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any := subtle.AnyOverlap(x, y)
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if any != anyOverlap {
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t.Errorf("%d: wrong AnyOverlap result, expected %v, got %v", i, anyOverlap, any)
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}
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inexact := subtle.InexactOverlap(x, y)
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if inexact != inexactOverlap {
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t.Errorf("%d: wrong InexactOverlap result, expected %v, got %v", i, inexactOverlap, any)
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}
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}
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func TestAliasing(t *testing.T) {
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for i, tt := range aliasingTests {
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testAliasing(t, i, tt.x, tt.y, tt.anyOverlap, tt.inexactOverlap)
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testAliasing(t, i, tt.y, tt.x, tt.anyOverlap, tt.inexactOverlap)
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}
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}
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