Added const-time flag to DSA key decoding to avoid potential leak of …

…privkey Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from #4440)
openssl · Sep 29, 2017 · 6364475 · 6364475
1 parent 681acb3
commit 6364475
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/crypto/dsa/dsa_ameth.c b/crypto/dsa/dsa_ameth.c
@@ -175,6 +175,7 @@ static int dsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
         goto dsaerr;
     }
 
+    BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
     if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
         goto dsaerr;