bn: fix occurance of negative zero in BN_rshift1()
@@ -74,6 +74,8 @@ int BN_rshift1(BIGNUM *r, const BIGNUM *a)
c = (t & 1) ? BN_TBIT : 0;
}
r->top = j;
+ if (!r->top)
+ r->neg = 0; /* don't allow negative zero */
bn_check_top(r);
return (1);
}
