Constant time comparison for mac

1 files changed, 9 insertions, 2 deletions

diff --git a/include/axolotl/memory.hh b/include/axolotl/memory.hh
index 7749c54..8313a19 100644
--- a/include/axolotl/memory.hh
+++ b/include/axolotl/memory.hh
@@ -1,17 +1,24 @@
 #include <cstddef>
+#include <cstdint>
 
 namespace axolotl {
 
 /** Clear the memory held in the buffer */
 void unset(
-    volatile void * buffer, std::size_t buffer_length
+    void volatile * buffer, std::size_t buffer_length
 );
 
 /** Clear the memory backing an object */
 template<typename T>
 void unset(T & value) {
-    unset(reinterpret_cast<volatile void *>(&value), sizeof(T));
+    unset(reinterpret_cast<void volatile *>(&value), sizeof(T));
 }
 
+/** Check if two buffers are equal in constant time. */
+bool is_equal(
+    std::uint8_t const * buffer_a,
+    std::uint8_t const * buffer_b,
+    std::size_t length
+);
 
 } // namespace axolotl