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Test Issue 52075 - generic impl panic when scalar has too many leading zeroes

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Emman 2022-04-08 10:50:11 +08:00
parent 6450e27784
commit fc6fce3bbf
1 changed files with 14 additions and 0 deletions
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14
sm2/p256_test.go
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@ -277,3 +277,17 @@ func TestP256CombinedMult(t *testing.T) {
t.Errorf("1×G + (-1)×G = (%d, %d), should be ∞", x, y) t.Errorf("1×G + (-1)×G = (%d, %d), should be ∞", x, y)
} }
} }
func TestIssue52075(t *testing.T) {
Gx, Gy := P256().Params().Gx, P256().Params().Gy
scalar := make([]byte, 33)
scalar[32] = 1
x, y := P256().ScalarBaseMult(scalar)
if x.Cmp(Gx) != 0 || y.Cmp(Gy) != 0 {
t.Errorf("unexpected output (%v,%v)", x, y)
}
x, y = P256().ScalarMult(Gx, Gy, scalar)
if x.Cmp(Gx) != 0 || y.Cmp(Gy) != 0 {
t.Errorf("unexpected output (%v,%v)", x, y)
}
}