SRP_Calc_server_key
BIGNUM *SRP_Calc_server_key(const BIGNUM *A, const BIGNUM *v, const BIGNUM *u,
if ((K = SRP_Calc_server_key(s->srp_ctx.A, s->srp_ctx.v, u, s->srp_ctx.b,
Kserver = SRP_Calc_server_key(Apub, v, u, b, GN->N);
Kserver = SRP_Calc_server_key(Apub, v, u, b, GN->N);