- if (bn_wexpand(tmp,2*max+1) == NULL) return(0);
- bn_sqr_recursive(r->d,a->d,al,tmp->d);
+ int j,k;
+
+ j=BN_num_bits_word((BN_ULONG)al);
+ j=1<<(j-1);
+ k=j+j;
+ if (al == j)
+ {
+ if (bn_wexpand(tmp,k*2) == NULL) goto err;
+ bn_sqr_recursive(rr->d,a->d,al,tmp->d);
+ }
+ else
+ {
+ if (bn_wexpand(tmp,max) == NULL) goto err;
+ bn_sqr_normal(rr->d,a->d,al,tmp->d);
+ }