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BN_copy now propagates BN_FLG_CONSTTIME

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Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4377)
This commit is contained in:
Samuel Weiser 2017-09-16 16:52:44 +02:00 committed by Matt Caswell
parent 3de81a5912
commit 9f9442918a
2 changed files with 3 additions and 2 deletions
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3
crypto/bn/bn_lib.c
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@ -332,6 +332,9 @@ BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
if (b->top > 0)
memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);
if (BN_get_flags(b, BN_FLG_CONSTTIME) != 0)
BN_set_flags(a, BN_FLG_CONSTTIME);
a->top = b->top;
a->neg = b->neg;
bn_check_top(a);

2
crypto/bn/bn_mont.c
View File

@ -258,8 +258,6 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
R = &(mont->RR); /* grab RR as a temp */
if (!BN_copy(&(mont->N), mod))
goto err; /* Set N */
if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0)
BN_set_flags(&(mont->N), BN_FLG_CONSTTIME);
mont->N.neg = 0;
#ifdef MONT_WORD