crypto: add IsOnCurve check (#76)

ethereum/go-ethereum#31100
dogechain-lab · Feb 10, 2025 · 8ce08dd · 8ce08dd
1 parent 73ec829
commit 8ce08dd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/crypto/crypto.go b/crypto/crypto.go
@@ -203,6 +203,9 @@ func UnmarshalPubkey(pub []byte) (*ecdsa.PublicKey, error) {
 	if x == nil {
 		return nil, errInvalidPubkey
 	}
+	if !S256().IsOnCurve(x, y) {
+		return nil, errInvalidPubkey
+	}
 	return &ecdsa.PublicKey{Curve: S256(), X: x, Y: y}, nil
 }