From c45f243d1578b920c50d8da1158631998c0ed988 Mon Sep 17 00:00:00 2001
From: duncathan <dunc2403@dunc2403.com>
Date: Sun, 15 Sep 2019 17:38:09 -0600
Subject: [PATCH] use a proper hashing algorithm for seeds like i should've
 from the start

---
 src/conf.lua       |  1 -
 src/main.lua       |  1 +
 src/randomizer.lua | 14 ++++++--------
 3 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/conf.lua b/src/conf.lua
index cba8b7c..94fbd09 100644
--- a/src/conf.lua
+++ b/src/conf.lua
@@ -17,7 +17,6 @@ function love.conf(t)
   t.gammacorrect = false
   
   t.modules.audio = false
-  t.modules.data = false
   t.modules.joystick = false
   t.modules.physics = false
   t.modules.sound = false
diff --git a/src/main.lua b/src/main.lua
index 8765060..67935ce 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -7,6 +7,7 @@ _       = require 'lib.moses'
 
 lf = love.filesystem
 lg = love.graphics
+ld = love.data
 
 U = require 'util'
 
diff --git a/src/randomizer.lua b/src/randomizer.lua
index 03f6cd4..d22d40f 100644
--- a/src/randomizer.lua
+++ b/src/randomizer.lua
@@ -93,14 +93,12 @@ function C:_mountDirectory(path)
 end
 
 function C:_seedRngesus()
-  local seed = self.customseed or os.time()
-  seed = tonumber(seed) or tonumber(seed, 36) -- convert alphanumeric strings to numbers
-  local seedstring = self.customseed or tostring(seed)
-  if seed == nil then
-    seed = os.time()
-    seedstring = ('%d ("%s" was invalid)'):format(seed, self.customseed)
-  end
-  love.math.setRandomSeed(seed)
+  local seedstring = self.customseed or tostring(os.time())
+  local seed = ld.encode('string', 'hex', ld.hash('sha256', seedstring))
+  local s1 = tonumber(seed:sub(-8,  -1), 16) -- first 32 bits (from right)
+  local s2 = tonumber(seed:sub(-16, -9), 16) -- next 32 bits
+
+  love.math.setRandomSeed(s1, s2)
   
   logNotice(('Offering seed "%s" to RNGesus' ):format(seedstring))
   return seedstring