- w = newbn(dss_q[0]);
- qm2 = copybn(dss_q);
- decbn(qm2); decbn(qm2);
- diagbn("qm2=", qm2);
- /* Now qm2 is q-2, and by Fermat's Little Theorem, s^qm2 == s^-1 (mod q).
- * This is a silly way to do it; may fix it later. */
- modpow(s, qm2, dss_q, w);