added support for OTP 22 and 24

Author: zookzook

lib/mongo/pbkdf2.ex

@@ -54,7 +54,14 @@ defmodule Mongo.PBKDF2 do
     iterate(fun, iteration - 1, next, :crypto.exor(next, acc))
   end
 
-  defp mac_fun(digest, secret) do
-    &:crypto.mac(:hmac, digest, secret, &1)
+  if Code.ensure_loaded?(:crypto) and function_exported?(:crypto, :hmac, 3) do
+    defp mac_fun(digest, secret) do
+      &:crypto.hmac(digest, secret, &1)
+    end
+  else
+    defp mac_fun(digest, secret) do
+      &:crypto.mac(:hmac, digest, secret, &1)
+    end
   end
+
 end