Add domainSep. check expand xof

dedis · Jun 12, 2024 · a607602 · a607602
1 parent 465b0ca
commit a607602
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/group/edwards25519/point.go b/group/edwards25519/point.go
@@ -399,7 +399,7 @@ func expandMessageXMD(h hash.Hash, m []byte, domainSeparator string, byteLen int
 }
 
 func expandMessageXOF(h sha3.ShakeHash, m []byte, domainSeparator string, byteLen int) ([]byte, error) {
-	if byteLen > 65535 {
+	if byteLen > 65535 || len(domainSeparator) == 0 {
 		return nil, errors.New("invalid parameters")
 	}