Mercurial > hg > quicktun

diff src/randombytes.c @ 64:fa53d1c54886
Use default RNG for key generation, added options to generate public key from private key, use bundled tweetnacl as fallback instead of nacl download
author: Ivo Smits <Ivo@UFO-Net.nl>
date: Sat, 07 Jan 2017 18:07:27 +0100
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/randombytes.c	Sat Jan 07 18:07:27 2017 +0100
@@ -0,0 +1,37 @@
+/*
+randombytes/devurandom.h version 20080713
+D. J. Bernstein
+Public domain.
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static int fd = -1;
+
+void randombytes(unsigned char *x,unsigned long long xlen) {
+  int i;
+
+  if (fd == -1) {
+    for (;;) {
+      fd = open("/dev/urandom",O_RDONLY);
+      if (fd != -1) break;
+      sleep(1);
+    }
+  }
+
+  while (xlen > 0) {
+    if (xlen < 1048576) i = xlen; else i = 1048576;
+
+    i = read(fd,x,i);
+    if (i < 1) {
+      sleep(1);
+      continue;
+    }
+
+    x += i;
+    xlen -= i;
+  }
+}