use ChaCha8-based CSPRNG

2018-08-25 23:00:00 -04:00
parent 2b7c9362bb
commit c41e659383
5 changed files with 235 additions and 7 deletions
--- a/random.h
+++ b/random.h
@@ -3,10 +3,15 @@

 #include <stdint.h>

-#define RANDOM_CACHE_SIZE 4096
+#include "chacha.h"
+
+#define RANDOM_CACHE_SIZE 256ULL
+#define RANDOM_RESEED_SIZE 256ULL * 1024

 struct random_state {
    size_t index;
+    size_t reseed;
+    chacha_ctx ctx;
    uint8_t cache[RANDOM_CACHE_SIZE];
 };