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// Copyright 2021 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 nistec_test
import (
"crypto/elliptic/internal/nistec"
"math/rand"
"os"
"strings"
"testing"
)
func TestAllocations(t *testing.T) {
if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-noopt") {
t.Skip("skipping allocations test without relevant optimizations")
}
t.Run("P224", func(t *testing.T) {
if allocs := testing.AllocsPerRun(100, func() {
p := nistec.NewP224Generator()
scalar := make([]byte, 66)
rand.Read(scalar)
p.ScalarMult(p, scalar)
out := p.Bytes()
if _, err := p.SetBytes(out); err != nil {
t.Fatal(err)
}
}); allocs > 0 {
t.Errorf("expected zero allocations, got %0.1f", allocs)
}
})
t.Run("P384", func(t *testing.T) {
if allocs := testing.AllocsPerRun(100, func() {
p := nistec.NewP384Generator()
scalar := make([]byte, 66)
rand.Read(scalar)
p.ScalarMult(p, scalar)
out := p.Bytes()
if _, err := p.SetBytes(out); err != nil {
t.Fatal(err)
}
}); allocs > 0 {
t.Errorf("expected zero allocations, got %0.1f", allocs)
}
})
t.Run("P521", func(t *testing.T) {
if allocs := testing.AllocsPerRun(100, func() {
p := nistec.NewP521Generator()
scalar := make([]byte, 66)
rand.Read(scalar)
p.ScalarMult(p, scalar)
out := p.Bytes()
if _, err := p.SetBytes(out); err != nil {
t.Fatal(err)
}
}); allocs > 0 {
t.Errorf("expected zero allocations, got %0.1f", allocs)
}
})
}
func BenchmarkScalarMult(b *testing.B) {
b.Run("P224", func(b *testing.B) {
scalar := make([]byte, 66)
rand.Read(scalar)
p := nistec.NewP224Generator()
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
p.ScalarMult(p, scalar)
}
})
b.Run("P384", func(b *testing.B) {
scalar := make([]byte, 66)
rand.Read(scalar)
p := nistec.NewP384Generator()
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
p.ScalarMult(p, scalar)
}
})
b.Run("P521", func(b *testing.B) {
scalar := make([]byte, 66)
rand.Read(scalar)
p := nistec.NewP521Generator()
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
p.ScalarMult(p, scalar)
}
})
}
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