--- a/oqsphp.i
+++ b/oqsphp.i
@@ -25,6 +25,7 @@
 %module(directors="1") oqsphp
 %{
 #include "oqs/oqs.h"
+#include "oqs/sha3.h"
 #include <string>
 #include <stdexcept>
 #include <exception>
@@ -39,6 +40,20 @@
 %feature("director");
 %feature("php:type", "1");
 
+%inline %{
+std::string contractless_shake256(const std::string &input, size_t output_length) {
+    std::string output;
+    output.resize(output_length);
+    OQS_SHA3_shake256(
+        reinterpret_cast<uint8_t *>(output.data()),
+        output_length,
+        reinterpret_cast<const uint8_t *>(input.data()),
+        input.length()
+    );
+    return output;
+}
+%}
+
 %inline %{
 class CustomException : public std::exception {
 public: