Minor change

Author: Egor-Skriptunoff

sha2.lua

@@ -3,7 +3,7 @@
 --------------------------------------------------------------------------------------------------------------------------
 -- MODULE: sha2
 --
--- VERSION: 2 (2018-10-07)
+-- VERSION: 2 (2018-10-08)
 --
 -- DESCRIPTION:
 -- This module contains functions to calculate SHA2 digest:
@@ -229,8 +229,8 @@ elseif branch == "EMUL" then
  local AND_of_two_bytes = {[0] = 0} -- look-up table (256*256 entries)
  local idx = 0
  for y = 0, 127 * 256, 256 do
- for x = 0, 127 do
- x = AND_of_two_bytes[y + x] * 2
+ for x = y, y + 127 do
+ x = AND_of_two_bytes[x] * 2
  AND_of_two_bytes[idx] = x
  AND_of_two_bytes[idx + 1] = x
  AND_of_two_bytes[idx + 256] = x