rng-tools entropy patch

--- rngd.c.orig 2016-06-26 09:20:49.794710463 -0500
+++ rngd.c  2016-06-26 09:45:25.960046722 -0500
@@ -57,6 +57,8 @@
  * Globals
  */

+#define KERNEL_INPUT_BYTES 8192
+
 /* Background/daemon mode */
 bool am_daemon;                /* True if we went daemon */

@@ -90,10 +92,10 @@ static struct argp_option options[] = {
      "File used for recording daemon PID, and multiple exclusion (default: /var/run/rngd.pid)" },

    { "random-step", 's', "nnn", 0,
-     "Number of bytes written to random-device at a time (default: 64)" },
+     "Number of bytes written to random-device at a time (default: 64, 0 <= n <= 8192)" },

    { "fill-watermark", 'W', "n", 0,
-     "Do not stop feeding entropy to random-device until at least n bits of entropy are available in the pool (default: 2048), 0 <= n <= 4096" },
+     "Do not stop feeding entropy to random-device until at least n bits of entropy are available in the pool (default: 2048), 0 <= n <= 65536" },

    { "quiet", 'q', 0, 0, "Suppress error messages" },

@@ -167,7 +169,7 @@ static error_t parse_opt (int key, char
        break;
    case 'W': {
        int n;
-       if ((sscanf(arg, "%i", &n) == 0) || (n < 0) || (n > 4096))
+       if ((sscanf(arg, "%i", &n) == 0) || (n < 0) || (n > 65536))
            argp_usage(state);
        else
            arguments->fill_watermark = n;
@@ -216,7 +218,7 @@ static int update_kernel_random(int rand
    if (fips)
        return 1;

-   for (p = buf; p + random_step <= &buf[FIPS_RNG_BUFFER_SIZE];
+   for (p = buf; p + random_step <= &buf[KERNEL_INPUT_BYTES];
         p += random_step) {
        random_add_entropy(p, random_step);
        random_sleep();
@@ -226,7 +228,7 @@ static int update_kernel_random(int rand

 static void do_loop(int random_step)
 {
-   unsigned char buf[FIPS_RNG_BUFFER_SIZE];
+   unsigned char buf[KERNEL_INPUT_BYTES];
    int retval = 0;
    int no_work = 0;