When adding positive elements, we can use BN_uadd() instead of BN_add().

Submitted by: Nils Larsch
Reviewed by: Geoff Thorpe

diff --git a/crypto/bn/bn_mod.c b/crypto/bn/bn_mod.c
index 61b72550985487790368cd304a4928268d0c74d1..77d6ddb91a5fc9fe1b89ec1caa9579d1c95baa10 100644 (file)
--- a/crypto/bn/bn_mod.c
+++ b/crypto/bn/bn_mod.c
@@ -149,7 +149,7 @@ int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, BN_
  * and less than  m */
 int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m)
        {
-       if (!BN_add(r, a, b)) return 0;
+       if (!BN_uadd(r, a, b)) return 0;
        if (BN_ucmp(r, m) >= 0)
                return BN_usub(r, r, m);
        return 1;