Browse Source

Add subword() function

T. Meissner 5 years ago
parent
commit
be5b8afaa4
1 changed files with 12 additions and 0 deletions
  1. +12
    -0
      aes/rtl/vhdl/aes_pkg.vhd

+ 12
- 0
aes/rtl/vhdl/aes_pkg.vhd View File

@ -146,6 +146,8 @@ package aes_pkg is
function bytesub (input : std_logic_vector(7 downto 0)) return std_logic_vector;
function invbytesub (input : std_logic_vector(7 downto 0)) return std_logic_vector;
function subword (input : t_datatable1d) return t_datatable1d;
function subbytes (input : in t_datatable2d) return t_datatable2d;
function invsubbytes (input : in t_datatable2d) return t_datatable2d;
@ -203,6 +205,16 @@ package body aes_pkg is
end function invbytesub;
function subword (input : t_datatable1d) return t_datatable1d is
v_data : t_datatable1d;
begin
for i in 0 to 3 loop
v_data(i) := c_sbox(to_integer(unsigned(input(i)(7 downto 4))))(to_integer(unsigned(input(i)(3 downto 0))));
end loop;
return v_data;
end function subword;
function subbytes (input : in t_datatable2d) return t_datatable2d is
variable v_data : t_datatable2d;
begin


Loading…
Cancel
Save