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Update 1.1.1-pre8

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Hakase
2018-06-24 20:52:36 +09:00
parent 5d513892b8
commit 4c4004fa50
48 changed files with 288 additions and 298 deletions
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crypto/bn/bn_prime.c
+13 -15
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@@ -154,19 +154,21 @@ int BN_is_prime_fasttest_ex(const BIGNUM *a, int checks, BN_CTX *ctx_passed,
int i, j, ret = -1;
int k;
BN_CTX *ctx = NULL;
BIGNUM *A1, *A1_odd, *check; /* taken from ctx */
BIGNUM *A1, *A1_odd, *A3, *check; /* taken from ctx */
BN_MONT_CTX *mont = NULL;
if (BN_cmp(a, BN_value_one()) <= 0)
/* Take care of the really small primes 2 & 3 */
if (BN_is_word(a, 2) || BN_is_word(a, 3))
return 1;
/* Check odd and bigger than 1 */
if (!BN_is_odd(a) || BN_cmp(a, BN_value_one()) <= 0)
return 0;
if (checks == BN_prime_checks)
checks = BN_prime_checks_for_size(BN_num_bits(a));
/* first look for small factors */
if (!BN_is_odd(a))
/* a is even => a is prime if and only if a == 2 */
return BN_is_word(a, 2);
if (do_trial_division) {
for (i = 1; i < NUMPRIMES; i++) {
BN_ULONG mod = BN_mod_word(a, primes[i]);
@@ -186,20 +188,18 @@ int BN_is_prime_fasttest_ex(const BIGNUM *a, int checks, BN_CTX *ctx_passed,
BN_CTX_start(ctx);
A1 = BN_CTX_get(ctx);
A3 = BN_CTX_get(ctx);
A1_odd = BN_CTX_get(ctx);
check = BN_CTX_get(ctx);
if (check == NULL)
goto err;
/* compute A1 := a - 1 */
if (!BN_copy(A1, a))
if (!BN_copy(A1, a) || !BN_sub_word(A1, 1))
goto err;
if (!BN_sub_word(A1, 1))
/* compute A3 := a - 3 */
if (!BN_copy(A3, a) || !BN_sub_word(A3, 3))
goto err;
if (BN_is_zero(A1)) {
ret = 0;
goto err;
}
/* write A1 as A1_odd * 2^k */
k = 1;
@@ -216,11 +216,9 @@ int BN_is_prime_fasttest_ex(const BIGNUM *a, int checks, BN_CTX *ctx_passed,
goto err;
for (i = 0; i < checks; i++) {
if (!BN_priv_rand_range(check, A1))
/* 1 < check < a-1 */
if (!BN_priv_rand_range(check, A3) || !BN_add_word(check, 2))
goto err;
if (!BN_add_word(check, 1))
goto err;
/* now 1 <= check < a */
j = witness(check, a, A1, A1_odd, k, ctx, mont);
if (j == -1)