1 files changed, 54 insertions, 0 deletions
diff --git a/src/crypto/elliptic/fuzz_test.go b/src/crypto/elliptic/fuzz_test.go
new file mode 100644
index 0000000..8ff3bf3
--- /dev/null
+++ b/src/crypto/elliptic/fuzz_test.go
@@ -0,0 +1,54 @@
+// 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.
+
+//go:build amd64 || arm64 || ppc64le
+// +build amd64 arm64 ppc64le
+
+package elliptic
+
+import (
+	"crypto/rand"
+	"testing"
+	"time"
+)
+
+func TestFuzz(t *testing.T) {
+	p256 := P256()
+	p256Generic := p256.Params()
+
+	var scalar1 [32]byte
+	var scalar2 [32]byte
+	var timeout *time.Timer
+
+	if testing.Short() {
+		timeout = time.NewTimer(10 * time.Millisecond)
+	} else {
+		timeout = time.NewTimer(2 * time.Second)
+	}
+
+	for {
+		select {
+		case <-timeout.C:
+			return
+		default:
+		}
+
+		rand.Read(scalar1[:])
+		rand.Read(scalar2[:])
+
+		x, y := p256.ScalarBaseMult(scalar1[:])
+		x2, y2 := p256Generic.ScalarBaseMult(scalar1[:])
+
+		xx, yy := p256.ScalarMult(x, y, scalar2[:])
+		xx2, yy2 := p256Generic.ScalarMult(x2, y2, scalar2[:])
+
+		if x.Cmp(x2) != 0 || y.Cmp(y2) != 0 {
+			t.Fatalf("ScalarBaseMult does not match reference result with scalar: %x, please report this error to security@golang.org", scalar1)
+		}
+
+		if xx.Cmp(xx2) != 0 || yy.Cmp(yy2) != 0 {
+			t.Fatalf("ScalarMult does not match reference result with scalars: %x and %x, please report this error to security@golang.org", scalar1, scalar2)
+		}
+	}
+}