diff options
Diffstat (limited to 'crypto/dsa/dsa_key.c')
| -rw-r--r-- | crypto/dsa/dsa_key.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/crypto/dsa/dsa_key.c b/crypto/dsa/dsa_key.c index 8427b77970..c4aa86bc6d 100644 --- a/crypto/dsa/dsa_key.c +++ b/crypto/dsa/dsa_key.c @@ -98,8 +98,22 @@ static int dsa_builtin_keygen(DSA *dsa) } else pub_key=dsa->pub_key; + + { + BIGNUM local_prk; + BIGNUM *prk; + + if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) + { + BN_init(&local_prk); + prk = &local_prk; + BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME); + } + else + prk = priv_key; - if (!BN_mod_exp(pub_key,dsa->g,priv_key,dsa->p,ctx)) goto err; + if (!BN_mod_exp(pub_key,dsa->g,prk,dsa->p,ctx)) goto err; + } dsa->priv_key=priv_key; dsa->pub_key=pub_key; |