OpenSSL::X509::Request#verify

static VALUE
ossl_x509req_verify(VALUE self, VALUE key)
{
    X509_REQ *req;
    EVP_PKEY *pkey;

    GetX509Req(self, req);
    pkey = GetPKeyPtr(key);
    ossl_pkey_check_public_key(pkey);
    switch (X509_REQ_verify(req, pkey)) {
      case 1:
        return Qtrue;
      case 0:
        ossl_clear_error();
        return Qfalse;
      default:
        ossl_raise(eX509ReqError, NULL);
    }
}