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Hakase
2019-01-18 00:56:21 +09:00
parent 5b465b332e
commit 87e37412f8
71 changed files with 4462 additions and 622 deletions
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crypto/bn/bn_exp.c
+34 -32
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@@ -648,34 +648,41 @@ int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
goto err;
}
#ifdef RSAZ_ENABLED
if (!a->neg) {
/*
* If the size of the operands allow it, perform the optimized
* RSAZ exponentiation. For further information see
* crypto/bn/rsaz_exp.c and accompanying assembly modules.
*/
if ((16 == a->top) && (16 == p->top) && (BN_num_bits(m) == 1024)
&& rsaz_avx2_eligible()) {
if (NULL == bn_wexpand(rr, 16))
goto err;
RSAZ_1024_mod_exp_avx2(rr->d, a->d, p->d, m->d, mont->RR.d,
mont->n0[0]);
rr->top = 16;
rr->neg = 0;
bn_correct_top(rr);
ret = 1;
goto err;
} else if ((8 == a->top) && (8 == p->top) && (BN_num_bits(m) == 512)) {
if (NULL == bn_wexpand(rr, 8))
goto err;
RSAZ_512_mod_exp(rr->d, a->d, p->d, m->d, mont->n0[0], mont->RR.d);
rr->top = 8;
rr->neg = 0;
bn_correct_top(rr);
ret = 1;
if (a->neg || BN_ucmp(a, m) >= 0) {
BIGNUM *reduced = BN_CTX_get(ctx);
if (reduced == NULL
|| !BN_nnmod(reduced, a, m, ctx)) {
goto err;
}
a = reduced;
}
#ifdef RSAZ_ENABLED
/*
* If the size of the operands allow it, perform the optimized
* RSAZ exponentiation. For further information see
* crypto/bn/rsaz_exp.c and accompanying assembly modules.
*/
if ((16 == a->top) && (16 == p->top) && (BN_num_bits(m) == 1024)
&& rsaz_avx2_eligible()) {
if (NULL == bn_wexpand(rr, 16))
goto err;
RSAZ_1024_mod_exp_avx2(rr->d, a->d, p->d, m->d, mont->RR.d,
mont->n0[0]);
rr->top = 16;
rr->neg = 0;
bn_correct_top(rr);
ret = 1;
goto err;
} else if ((8 == a->top) && (8 == p->top) && (BN_num_bits(m) == 512)) {
if (NULL == bn_wexpand(rr, 8))
goto err;
RSAZ_512_mod_exp(rr->d, a->d, p->d, m->d, mont->n0[0], mont->RR.d);
rr->top = 8;
rr->neg = 0;
bn_correct_top(rr);
ret = 1;
goto err;
}
#endif
@@ -747,12 +754,7 @@ int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
goto err;
/* prepare a^1 in Montgomery domain */
if (a->neg || BN_ucmp(a, m) >= 0) {
if (!BN_nnmod(&am, a, m, ctx))
goto err;
if (!bn_to_mont_fixed_top(&am, &am, mont, ctx))
goto err;
} else if (!bn_to_mont_fixed_top(&am, a, mont, ctx))
if (!bn_to_mont_fixed_top(&am, a, mont, ctx))
goto err;
#if defined(SPARC_T4_MONT)