diff options
Diffstat (limited to 'crypto/rsa/rsa_lib.c')
| -rw-r--r-- | crypto/rsa/rsa_lib.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c index cca32c098df8..104aa4c1f2da 100644 --- a/crypto/rsa/rsa_lib.c +++ b/crypto/rsa/rsa_lib.c @@ -361,7 +361,8 @@ err: BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx) { - BIGNUM *e; + BIGNUM local_n; + BIGNUM *e,*n; BN_CTX *ctx; BN_BLINDING *ret = NULL; @@ -400,7 +401,16 @@ BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx) RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0.0); } - ret = BN_BLINDING_create_param(NULL, e, rsa->n, ctx, + if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) + { + /* Set BN_FLG_CONSTTIME flag */ + n = &local_n; + BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME); + } + else + n = rsa->n; + + ret = BN_BLINDING_create_param(NULL, e, n, ctx, rsa->meth->bn_mod_exp, rsa->_method_mod_n); if (ret == NULL) { |