1 /*
2 * stat-driver.c
3 *
4 * test driver for the stat_test functions
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9
10
11 #include <stdio.h> /* for printf() */
12
13 #include "err.h"
14 #include "stat.h"
15
16 #include "cipher.h"
17
18 typedef struct {
19 void *state;
20 } random_source_t;
21
22 err_status_t
23 random_source_alloc(void);
24
25 void
err_check(err_status_t s)26 err_check(err_status_t s) {
27 if (s) {
28 printf("error (code %d)\n", s);
29 exit(1);
30 }
31 }
32
33 int
main(int argc,char * argv[])34 main (int argc, char *argv[]) {
35 uint8_t buffer[2500];
36 unsigned int buf_len = 2500;
37 int i, j;
38 extern cipher_type_t aes_icm;
39 cipher_t *c;
40 uint8_t key[30] = {
41 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
42 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
43 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
44 0x00, 0x01, 0x02, 0x03, 0x04, 0x05
45 };
46 v128_t nonce;
47 int num_trials = 500;
48 int num_fail;
49
50 printf("statistical tests driver\n");
51
52 for (i=0; i < 2500; i++)
53 buffer[i] = 0;
54
55 /* run tests */
56 printf("running stat_tests on all-null buffer, expecting failure\n");
57 printf("monobit %d\n", stat_test_monobit(buffer));
58 printf("poker %d\n", stat_test_poker(buffer));
59 printf("runs %d\n", stat_test_runs(buffer));
60
61 for (i=0; i < 2500; i++)
62 buffer[i] = rand();
63 printf("running stat_tests on rand(), expecting success\n");
64 printf("monobit %d\n", stat_test_monobit(buffer));
65 printf("poker %d\n", stat_test_poker(buffer));
66 printf("runs %d\n", stat_test_runs(buffer));
67
68 printf("running stat_tests on AES-128-ICM, expecting success\n");
69 /* set buffer to cipher output */
70 for (i=0; i < 2500; i++)
71 buffer[i] = 0;
72 err_check(cipher_type_alloc(&aes_icm, &c, 30));
73 err_check(cipher_init(c, key, direction_encrypt));
74 err_check(cipher_set_iv(c, &nonce));
75 err_check(cipher_encrypt(c, buffer, &buf_len));
76 /* run tests on cipher outout */
77 printf("monobit %d\n", stat_test_monobit(buffer));
78 printf("poker %d\n", stat_test_poker(buffer));
79 printf("runs %d\n", stat_test_runs(buffer));
80
81 printf("runs test (please be patient): ");
82 fflush(stdout);
83 num_fail = 0;
84 v128_set_to_zero(&nonce);
85 for(j=0; j < num_trials; j++) {
86 for (i=0; i < 2500; i++)
87 buffer[i] = 0;
88 nonce.v32[3] = i;
89 err_check(cipher_set_iv(c, &nonce));
90 err_check(cipher_encrypt(c, buffer, &buf_len));
91 if (stat_test_runs(buffer)) {
92 num_fail++;
93 }
94 }
95
96 printf("%d failures in %d tests\n", num_fail, num_trials);
97 printf("(nota bene: a small fraction of stat_test failures does not \n"
98 "indicate that the random source is invalid)\n");
99
100 return 0;
101 }
102