crypto: add IsOnCurve check (ethereum#31100)

blocknative · Jan 30, 2025 · 159fb1a · 159fb1a
1 parent db93d49
commit 159fb1a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/crypto/crypto.go b/crypto/crypto.go
@@ -178,6 +178,9 @@ 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
 }