| 71 |
|
|
| 72 |
|
static const char rnd_seed[] = "string to make the random number generator think it has entropy"; |
| 73 |
|
|
| 74 |
+ |
/* test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success. */ |
| 75 |
+ |
static int test_exp_mod_zero() { |
| 76 |
+ |
BIGNUM a, p, m; |
| 77 |
+ |
BIGNUM r; |
| 78 |
+ |
BN_CTX *ctx = BN_CTX_new(); |
| 79 |
+ |
int ret = 1; |
| 80 |
+ |
|
| 81 |
+ |
BN_init(&m); |
| 82 |
+ |
BN_one(&m); |
| 83 |
+ |
|
| 84 |
+ |
BN_init(&a); |
| 85 |
+ |
BN_one(&a); |
| 86 |
+ |
|
| 87 |
+ |
BN_init(&p); |
| 88 |
+ |
BN_zero(&p); |
| 89 |
+ |
|
| 90 |
+ |
BN_init(&r); |
| 91 |
+ |
BN_mod_exp(&r, &a, &p, &m, ctx); |
| 92 |
+ |
BN_CTX_free(ctx); |
| 93 |
+ |
|
| 94 |
+ |
if (BN_is_zero(&r)) |
| 95 |
+ |
ret = 0; |
| 96 |
+ |
else |
| 97 |
+ |
{ |
| 98 |
+ |
printf("1**0 mod 1 = "); |
| 99 |
+ |
BN_print_fp(stdout, &r); |
| 100 |
+ |
printf(", should be 0\n"); |
| 101 |
+ |
} |
| 102 |
+ |
|
| 103 |
+ |
BN_free(&r); |
| 104 |
+ |
BN_free(&a); |
| 105 |
+ |
BN_free(&p); |
| 106 |
+ |
BN_free(&m); |
| 107 |
+ |
|
| 108 |
+ |
return ret; |
| 109 |
+ |
} |
| 110 |
+ |
|
| 111 |
|
int main(int argc, char *argv[]) |
| 112 |
|
{ |
| 113 |
|
BN_CTX *ctx; |
| 227 |
|
ERR_remove_state(0); |
| 228 |
|
CRYPTO_mem_leaks(out); |
| 229 |
|
BIO_free(out); |
| 230 |
< |
printf(" done\n"); |
| 230 |
> |
printf("\n"); |
| 231 |
> |
|
| 232 |
> |
if (test_exp_mod_zero() != 0) |
| 233 |
> |
goto err; |
| 234 |
> |
|
| 235 |
> |
printf("done\n"); |
| 236 |
> |
|
| 237 |
|
EXIT(0); |
| 238 |
|
err: |
| 239 |
|
ERR_load_crypto_strings(); |
