Filippo Valsorda
b7391e95e5
Fixes golang/go#30965 Change-Id: I83a804d555c048e0124c35f95c9e611b2c5bdb01 Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/436856 Reviewed-by: Adam Langley <agl@google.com> Reviewed-on: https://go-review.googlesource.com/c/crypto/+/168406 Reviewed-by: Filippo Valsorda <filippo@golang.org> Run-TryBot: Filippo Valsorda <filippo@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
32 lines
1.0 KiB
Go
32 lines
1.0 KiB
Go
// Copyright 2019 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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// +build amd64,!appengine,!gccgo
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package salsa
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import (
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"bytes"
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"testing"
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)
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func TestCounterOverflow(t *testing.T) {
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in := make([]byte, 4096)
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key := &[32]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2}
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for n, counter := range []*[16]byte{
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&[16]byte{0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0}, // zero counter
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&[16]byte{0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff}, // counter about to overflow 32 bits
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&[16]byte{0, 1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 0xff, 0xff, 0xff, 0xff}, // counter above 32 bits
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} {
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out := make([]byte, 4096)
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XORKeyStream(out, in, counter, key)
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outGeneric := make([]byte, 4096)
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genericXORKeyStream(outGeneric, in, counter, key)
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if !bytes.Equal(out, outGeneric) {
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t.Errorf("%d: assembly and go implementations disagree", n)
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}
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}
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}
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