crypto: add IsOnCurve check (ethereum#31100)

(cherry picked from commit 159fb1a)
blocknative · Feb 5, 2025 · 8d4ca54 · 8d4ca54
1 parent 43df39f
commit 8d4ca54
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
 }