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/chacha.h
+++ b/chacha.h
@@ -0,0 +1,18 @@
+#ifndef CHACHA_H
+#define CHACHA_H
+
+#include <stdint.h>
+
+typedef uint8_t u8;
+typedef uint32_t u32;
+
+typedef struct
+{
+  u32 input[16];
+} chacha_ctx;
+
+void chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits);
+void chacha_ivsetup(chacha_ctx *x,const u8 *iv);
+void chacha_keystream_bytes(chacha_ctx *x,u8 *c,u32 bytes);
+
+#endif