OpenSSL::X509::ExtensionFactory#subject_request=

static VALUE
ossl_x509extfactory_set_subject_req(VALUE self, VALUE req)
{
    X509V3_CTX *ctx;

    GetX509ExtFactory(self, ctx);
    rb_iv_set(self, "@subject_request", req);
    ctx->subject_req = GetX509ReqPtr(req); /* NO DUP NEEDED */

    return req;
}