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[bytom/vapor.git] / crypto / ed25519 / ecmath / point_test.go

diff --git a/crypto/ed25519/ecmath/point_test.go b/crypto/ed25519/ecmath/point_test.go
new file mode 100644 (file)
index 0000000..4de539a
--- /dev/null
+++ b/crypto/ed25519/ecmath/point_test.go
@@ -0,0 +1,44 @@
+package ecmath
+
+import "testing"
+
+// base is the ed25519 base point
+var base Point
+
+func init() {
+       base.ScMulBase(&One)
+}
+
+func TestBasePointArith(t *testing.T) {
+       var base1 Point
+       base1.ScMul(&base, &One)
+       if !base.ConstTimeEqual(&base1) {
+               ebase := base.Encode()
+               ebase1 := base1.Encode()
+               t.Errorf("base [%x] != 1*base [%x]", ebase[:], ebase1[:])
+       }
+
+       Two := One
+       Two.Add(&Two, &One)
+
+       base2a := base
+       base2a.Add(&base2a, &base)
+
+       base2b := base
+       base2b.ScMul(&base2b, &Two)
+
+       if !base2a.ConstTimeEqual(&base2b) {
+               ebase2a := base2a.Encode()
+               ebase2b := base2b.Encode()
+               t.Errorf("base+base [%x] != 2*base [%x] (1)", ebase2a[:], ebase2b[:])
+       }
+
+       var base2c Point
+       base2c.ScMulBase(&Two)
+
+       if !base2a.ConstTimeEqual(&base2c) {
+               ebase2a := base2a.Encode()
+               ebase2c := base2c.Encode()
+               t.Errorf("base+base [%x] != 2*base [%x] (2)", ebase2a[:], ebase2c[:])
+       }
+}