fix: make rsa_pss int_to_bit_size more efficient

Author: jfrain99

src/rsa_pss.erl

@@ -12,6 +12,7 @@
 -module(rsa_pss).
 
 -include_lib("public_key/include/public_key.hrl").
+-include("include/hb.hrl").
 
 %% API
 -export([sign/3]).
@@ -185,16 +186,9 @@ ep(B, #'RSAPublicKey'{modulus=N, publicExponent=E}) ->
     crypto:mod_pow(B, E, N).
 
 %% @private
-int_to_bit_size(I) ->
-    int_to_bit_size(I, 0).
+int_to_bit_size(I) -> 
+    bit_size(binary:encode_unsigned(I)).
 
-%% @private
-int_to_bit_size(0, B) ->
-    B;
-int_to_bit_size(I, B) ->
-    int_to_bit_size(I bsr 1, B + 1).
-
-%% @private
 int_to_byte_size(I) ->
     int_to_byte_size(I, 0).