version=

static VALUE
ossl_x509req_set_version(VALUE self, VALUE version)
{
    X509_REQ *req;
    long ver;

    if ((ver = NUM2LONG(version)) < 0) {
        ossl_raise(eX509ReqError, "version must be >= 0!");
    }
    GetX509Req(self, req);
    if (!X509_REQ_set_version(req, ver)) {
        ossl_raise(eX509ReqError, "X509_REQ_set_version");
    }

    return version;
}