new

static VALUE
ossl_x509req_initialize(int argc, VALUE *argv, VALUE self)
{
    BIO *in;
    X509_REQ *req, *x = DATA_PTR(self);
    VALUE arg;

    if (rb_scan_args(argc, argv, "01", &arg) == 0) {
        return self;
    }
    arg = ossl_to_der_if_possible(arg);
    in = ossl_obj2bio(arg);
    req = PEM_read_bio_X509_REQ(in, &x, NULL, NULL);
    DATA_PTR(self) = x;
    if (!req) {
        OSSL_BIO_reset(in);
        req = d2i_X509_REQ_bio(in, &x);
        DATA_PTR(self) = x;
    }
    BIO_free(in);
    if (!req) ossl_raise(eX509ReqError, NULL);

    return self;
}