2 * Copyright (C) 2008-2012 Free Software Foundation, Inc.
4 * Author: Nikos Mavrogiannopoulos
6 * This file is part of GnuTLS.
8 * GnuTLS is free software: you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
13 * GnuTLS is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with GnuTLS. If not, see <http://www.gnu.org/licenses/>.
29 #include <sys/types.h>
35 #include <gnutls/gnutls.h>
36 #include <gnutls/crypto.h>
39 static void dump(const char* name, unsigned char* buf, int buf_size)
43 for(i=0;i<buf_size;i++)
44 printf("%.2x:", buf[i]);
48 #define FILENAME "./rng-test"
53 unsigned char buf1[32];
54 unsigned char buf2[32];
59 gnutls_global_init ();
63 fp = fopen(FILENAME, "w");
65 fail("cannot open file");
67 gnutls_rnd (GNUTLS_RND_RANDOM, buf1, sizeof (buf1));
68 if (debug) dump("buf1", buf1, sizeof(buf1));
70 fwrite(buf1, 1, sizeof(buf1), fp);
76 gnutls_rnd (GNUTLS_RND_RANDOM, buf2, sizeof (buf2));
77 if (debug) dump("buf2", buf2, sizeof(buf2));
78 waitpid(pid, NULL, 0);
80 fp = fopen(FILENAME, "r");
82 fail("cannot open file");
84 ret = fread(buf1, 1, sizeof(buf1), fp);
89 if (ret != sizeof(buf1))
91 fail("error testing the random generator.");
95 if (memcmp(buf1, buf2, sizeof(buf1))==0)
97 fail("error in the random generator. Produces same valus after fork()");
101 success("success\n");
104 gnutls_global_deinit ();