big_add
BIG_ERR_CODE big_add(BIGNUM *result, BIGNUM *aa, BIGNUM *bb);
if ((err = big_add(&tmp, &tmp, a)) != BIG_OK) {
if ((brv = big_add(&tmp, &tmp, &(dsakey.q))) != BIG_OK) {
if ((brv = big_add(&tmp1, &tmp1, &msg)) != BIG_OK) {
if (big_add(&tmp2, &tmp2, &(dsakey.q)) != BIG_OK) {
(void) big_add(&a, &c, &big_Two);
if ((brv = big_add(&d, &d, &a)) != BIG_OK) {
if ((brv = big_add(&f, &f, &c)) != BIG_OK) {