diff options
| author | Andy Polyakov <appro@openssl.org> | 2018-08-10 19:31:22 +0200 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2018-08-23 22:20:35 +0200 |
| commit | fcc4ee09473cac511eca90faa003661c7786e4f9 (patch) | |
| tree | b632f6792647ed32472a8d898437553df80a5ba3 /crypto/bn/bn_mul.c | |
| parent | 0b89db6b2acb6cca36f812ba51119927563b3cac (diff) | |
crypto/bn: add more fixed-top routines.
Add bn_{mul|sqr}_fixed_top, bn_from_mont_fixed_top, bn_mod_sub_fixed_top.
Switch to bn_{mul|sqr}_fixed_top in bn_mul_mont_fixed_top and remove
memset in bn_from_montgomery_word.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/6915)
Diffstat (limited to 'crypto/bn/bn_mul.c')
| -rw-r--r-- | crypto/bn/bn_mul.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/crypto/bn/bn_mul.c b/crypto/bn/bn_mul.c index 07aaf5891f..bbbb84ac30 100644 --- a/crypto/bn/bn_mul.c +++ b/crypto/bn/bn_mul.c @@ -496,6 +496,16 @@ void bn_mul_low_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n2, int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) { + int ret = bn_mul_fixed_top(r, a, b, ctx); + + bn_correct_top(r); + bn_check_top(r); + + return ret; +} + +int bn_mul_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) +{ int ret = 0; int top, al, bl; BIGNUM *rr; @@ -598,7 +608,7 @@ int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) end: #endif rr->neg = a->neg ^ b->neg; - bn_correct_top(rr); + rr->flags |= BN_FLG_FIXED_TOP; if (r != rr && BN_copy(r, rr) == NULL) goto err; |