SRP_Calc_u_ex
BIGNUM *SRP_Calc_u_ex(const BIGNUM *A, const BIGNUM *B, const BIGNUM *N,
if ((u = SRP_Calc_u_ex(s->srp_ctx.A, s->srp_ctx.B, s->srp_ctx.N,
|| (u = SRP_Calc_u_ex(s->srp_ctx.A, s->srp_ctx.B, s->srp_ctx.N,