diff options
Diffstat (limited to 'crypto/bn/bn_blind.c')
| -rw-r--r-- | crypto/bn/bn_blind.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/crypto/bn/bn_blind.c b/crypto/bn/bn_blind.c index ca22d4f8bd..c11fb4ccc2 100644 --- a/crypto/bn/bn_blind.c +++ b/crypto/bn/bn_blind.c @@ -131,7 +131,7 @@ struct bn_blinding_st BN_MONT_CTX *m_ctx); }; -BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod) +BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, /* const */ BIGNUM *mod) { BN_BLINDING *ret=NULL; @@ -151,7 +151,12 @@ BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod) { if ((ret->Ai = BN_dup(Ai)) == NULL) goto err; } - ret->mod = mod; + + /* save a copy of mod in the BN_BLINDING structure */ + if ((ret->mod = BN_dup(mod)) == NULL) goto err; + if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0) + BN_set_flags(ret->mod, BN_FLG_CONSTTIME); + ret->counter = BN_BLINDING_COUNTER; return(ret); err: @@ -167,6 +172,7 @@ void BN_BLINDING_free(BN_BLINDING *r) if (r->A != NULL) BN_free(r->A ); if (r->Ai != NULL) BN_free(r->Ai); if (r->e != NULL) BN_free(r->e ); + if (r->mod != NULL) BN_free(r->mod); OPENSSL_free(r); } @@ -278,7 +284,7 @@ void BN_BLINDING_set_flags(BN_BLINDING *b, unsigned long flags) } BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b, - const BIGNUM *e, BIGNUM *m, BN_CTX *ctx, + const BIGNUM *e, /* const */ BIGNUM *m, BN_CTX *ctx, int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx), BN_MONT_CTX *m_ctx) |