crypto/secp256r1: reject the reference pubKey coordinates

(cherry picked from commit 98f10b0d5e358075d03b76834cd30c97f4fbdfe1)
maticnetwork · Nov 3, 2023 · ab2f20e · ab2f20e
1 parent 2bbf30f
commit ab2f20e
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/crypto/secp256r1/publickey.go b/crypto/secp256r1/publickey.go
@@ -13,6 +13,11 @@ func newPublicKey(x, y *big.Int) *ecdsa.PublicKey {
 		return nil
 	}
 
+	// Check if the given coordinates are the reference point (infinity)
+	if x.Sign() == 0 && y.Sign() == 0 {
+		return nil
+	}
+
 	return &ecdsa.PublicKey{
 		Curve: elliptic.P256(),
 		X:     x,