#include <config.h>
#include <stdio.h>
#include <roken.h>
#include <getarg.h>
#include "rand.h"
static int version_flag;
static int help_flag;
static int len = 1024 * 1024;
static char *rand_method;
static char *filename;
static struct getargs args[] = {
{ "length", 0, arg_integer, &len,
"length", NULL },
{ "file", 0, arg_string, &filename,
"file name", NULL },
{ "method", 0, arg_string, &rand_method,
"method", NULL },
{ "version", 0, arg_flag, &version_flag,
"print version", NULL },
{ "help", 0, arg_flag, &help_flag,
NULL, NULL }
};
static void
usage (int ret)
{
arg_printusage (args,
sizeof(args)/sizeof(args[0]),
NULL,
"");
exit (ret);
}
int
main(int argc, char **argv)
{
int idx = 0;
char *buffer;
char path[MAXPATHLEN];
setprogname(argv[0]);
if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
usage(1);
if (help_flag)
usage(0);
if(version_flag){
print_version(NULL);
exit(0);
}
argc -= idx;
argv += idx;
if (argc != 0)
usage(1);
buffer = emalloc(len);
if (rand_method) {
if (0) {
}
#ifndef NO_RAND_FORTUNA_METHOD
else if (strcasecmp(rand_method, "fortuna") == 0)
RAND_set_rand_method(RAND_fortuna_method());
#endif
#ifndef NO_RAND_UNIX_METHOD
else if (strcasecmp(rand_method, "unix") == 0)
RAND_set_rand_method(RAND_unix_method());
#endif
#ifndef __APPLE_PRIVATE__
else if (strcasecmp(rand_method, "cc") == 0)
RAND_set_rand_method(RAND_cc_method());
#endif
#ifndef NO_RAND_EGD_METHOD
else if (strcasecmp(rand_method, "egd") == 0)
RAND_set_rand_method(RAND_egd_method());
#endif
#ifdef WIN32
else if (strcasecmp(rand_method, "w32crypto") == 0)
RAND_set_rand_method(RAND_w32crypto_method());
#endif
else
errx(1, "unknown method %s", rand_method);
}
if (RAND_file_name(path, sizeof(path)) == NULL)
errx(1, "RAND_file_name failed");
if (RAND_status() != 1)
errx(1, "random not ready yet");
if (RAND_bytes(buffer, len) != 1)
errx(1, "RAND_bytes");
if (filename)
rk_dumpdata(filename, buffer, len);
if (len >= 100000) {
int bit, i;
double res;
int bits[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
for (i = 0; i < len; i++) {
unsigned char c = ((unsigned char *)buffer)[i];
for (bit = 0; bit < 8 && c; bit++) {
if (c & 1)
bits[bit]++;
c = c >> 1;
}
}
for (bit = 0; bit < 8; bit++) {
res = ((double)abs(len - bits[bit] * 2)) / (double)len;
if (res > 0.005)
errx(1, "head%d vs tail%d > 0.5%%%% %lf == %d vs %d",
bit, bit, res, len, bits[bit]);
printf("head vs tails bit%d: %lf\n", bit, res);
}
}
free(buffer);
{
static const char *file = "test.file";
if (RAND_write_file(file) != 1)
errx(1, "RAND_write_file");
if (RAND_load_file(file, 1024) != 1)
errx(1, "RAND_load_file");
unlink(file);
}
return 0;
}