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Add framework for bn_mul_mont [from 098-fips].

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This commit is contained in:
Andy Polyakov 2007-11-11 20:43:23 +00:00
parent a1cc568288
commit 18fb9d807e
3 changed files with 17 additions and 0 deletions
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1
Configure
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@ -1227,6 +1227,7 @@ $bn_obj = $bn_asm unless $bn_obj ne "";
# bn86* is the only one implementing bn_*_part_words
$cflags.=" -DOPENSSL_BN_ASM_PART_WORDS" if ($bn_obj =~ /bn86/);
$cflags.=" -DOPENSSL_IA32_SSE2" if (!$no_sse2 && $bn_obj =~ /bn86/);
$cflags.=" -DOPENSSL_BN_ASM_MONT" if ($bn_obj =~ /\-mont|mo86\-/);
$des_obj=$des_enc unless ($des_obj =~ /\.o$/);
$bf_obj=$bf_enc unless ($bf_obj =~ /\.o$/);

1
crypto/bn/bn_lcl.h
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@ -481,6 +481,7 @@ BN_ULONG bn_add_part_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b,
int cl, int dl);
BN_ULONG bn_sub_part_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b,
int cl, int dl);
int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num);
#ifdef __cplusplus
}

15
crypto/bn/bn_mont.c
View File

@ -127,6 +127,21 @@ int BN_mod_mul_montgomery(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
{
BIGNUM *tmp;
int ret=0;
#if defined(OPENSSL_BN_ASM_MONT) && defined(MONT_WORD)
int num = mont->N.top;
if (num>1 && a->top==num && b->top==num)
{
if (bn_wexpand(r,num) == NULL) return(0);
if (bn_mul_mont(r->d,a->d,b->d,mont->N.d,&mont->n0,num))
{
r->neg = a->neg^b->neg;
r->top = num;
bn_correct_top(r);
return(1);
}
}
#endif
BN_CTX_start(ctx);
tmp = BN_CTX_get(ctx);