PHP 인터페이스와 ECharts를 사용하여 통계 차트의 데이터 암호화 및 암호 해독을 구현하는 방법

function encrypt($plaintext, $encryption_key) {
  $cipher = "AES-128-CBC";
  $ivlen = openssl_cipher_iv_length($cipher);
  $iv = openssl_random_pseudo_bytes($ivlen);
  $ciphertext_raw = openssl_encrypt($plaintext, $cipher, $encryption_key, $options=OPENSSL_RAW_DATA, $iv);
  $hmac = hash_hmac('sha256', $ciphertext_raw, $encryption_key, $as_binary=true);
  return base64_encode( $iv.$hmac.$ciphertext_raw );
}

$encryption_key = "my_secret_key";
$plaintext = "sensitive_data";
$ciphertext = encrypt($plaintext, $encryption_key);

function decrypt($ciphertext, $encryption_key) {
  $c = base64_decode($ciphertext);
  $cipher = "AES-128-CBC";
  $ivlen = openssl_cipher_iv_length($cipher);
  $iv = substr($c, 0, $ivlen);
  $hmac = substr($c, $ivlen, $sha2len=32);
  $ciphertext_raw = substr($c, $ivlen+$sha2len);
  $calcmac = hash_hmac('sha256', $ciphertext_raw, $encryption_key, $as_binary=true);
  if (!hash_equals($hmac, $calcmac)) { return null; }
  $plaintext = openssl_decrypt($ciphertext_raw, $cipher, $encryption_key, $options=OPENSSL_RAW_DATA, $iv);
  return $plaintext;
}

$encryption_key = "my_secret_key";
$plaintext = decrypt($ciphertext, $encryption_key);

<script src="https://cdn.staticfile.org/echarts/4.7.0/echarts.min.js"></script>
<script>
var myChart = echarts.init(document.getElementById('chart'));
var option = {
  title: { text: 'My Chart' },
  tooltip: {},
  xAxis: { data: ['A', 'B', 'C', 'D', 'E'] },
  yAxis: {},
  series: [{
    name: 'Data',
    type: 'bar',
    data: [5, 20, 36, 10, 10]
  }]
};
myChart.setOption(option);
</script>
<div id="chart" style="height: 400px;"></div>

<script>
var myChart = echarts.init(document.getElementById('chart'));
var url = "data.php?ciphertext=<?php echo $ciphertext; ?>";
myChart.showLoading();
$.getJSON(url, function(data) {
  myChart.hideLoading();
  myChart.setOption({
    title: { text: 'My Chart' },
    tooltip: {},
    xAxis: { data: data.labels },
    yAxis: {},
    series: [{
      name: 'Data',
      type: 'bar',
      data: data.values
    }]
  });
});
</script>

<?php
$encryption_key = "my_secret_key";
$ciphertext = $_GET["ciphertext"];
$plaintext = decrypt($ciphertext, $encryption_key);
$data = array(
  "labels" => array("A", "B", "C", "D", "E"),
  "values" => array(5, 20, 36, 10, 10)
);
echo json_encode($data);
?>