/* * stat-driver.c * * test driver for the stat_test functions * * David A. McGrew * Cisco Systems, Inc. */ #include <stdio.h> /* for printf() */ #include "err.h" #include "stat.h" #include "cipher.h" typedef struct { void *state; } random_source_t; err_status_t random_source_alloc(void); void err_check(err_status_t s) { if (s) { printf("error (code %d)\n", s); exit(1); } } int main (int argc, char *argv[]) { uint8_t buffer[2500]; unsigned int buf_len = 2500; int i, j; extern cipher_type_t aes_icm; cipher_t *c; uint8_t key[30] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 }; v128_t nonce; int num_trials = 500; int num_fail; printf("statistical tests driver\n"); for (i=0; i < 2500; i++) buffer[i] = 0; /* run tests */ printf("running stat_tests on all-null buffer, expecting failure\n"); printf("monobit %d\n", stat_test_monobit(buffer)); printf("poker %d\n", stat_test_poker(buffer)); printf("runs %d\n", stat_test_runs(buffer)); for (i=0; i < 2500; i++) buffer[i] = rand(); printf("running stat_tests on rand(), expecting success\n"); printf("monobit %d\n", stat_test_monobit(buffer)); printf("poker %d\n", stat_test_poker(buffer)); printf("runs %d\n", stat_test_runs(buffer)); printf("running stat_tests on AES-128-ICM, expecting success\n"); /* set buffer to cipher output */ for (i=0; i < 2500; i++) buffer[i] = 0; err_check(cipher_type_alloc(&aes_icm, &c, 30)); err_check(cipher_init(c, key, direction_encrypt)); err_check(cipher_set_iv(c, &nonce)); err_check(cipher_encrypt(c, buffer, &buf_len)); /* run tests on cipher outout */ printf("monobit %d\n", stat_test_monobit(buffer)); printf("poker %d\n", stat_test_poker(buffer)); printf("runs %d\n", stat_test_runs(buffer)); printf("runs test (please be patient): "); fflush(stdout); num_fail = 0; v128_set_to_zero(&nonce); for(j=0; j < num_trials; j++) { for (i=0; i < 2500; i++) buffer[i] = 0; nonce.v32[3] = i; err_check(cipher_set_iv(c, &nonce)); err_check(cipher_encrypt(c, buffer, &buf_len)); if (stat_test_runs(buffer)) { num_fail++; } } printf("%d failures in %d tests\n", num_fail, num_trials); printf("(nota bene: a small fraction of stat_test failures does not \n" "indicate that the random source is invalid)\n"); return 0; }