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Viewing file:     webauthn.js (3.86 KB)      -rwxr-xr--

/**
 * @param {ArrayBuffer} buffer
 *
 * @return {string}
 */
const arrayBufferToBase64 = buffer => {
  const bytes = new Uint8Array(buffer);
  let string = '';
  for (const byte of bytes) {
    string += String.fromCharCode(byte);
  }
  return window.btoa(string);
};

/**
 * @param {string} string
 *
 * @return {Uint8Array}
 */
const base64ToUint8Array = string => {
  return Uint8Array.from(window.atob(string), char => char.charCodeAt(0));
};

/**
 * @param {JQuery<HTMLElement>} $input
 *
 * @return {void}
 */
const handleCreation = $input => {
  const $form = $input.parents('form');
  $form.find('input[type=submit]').hide();
  const creationOptionsJson = $input.attr('data-creation-options');
  const creationOptions = JSON.parse(creationOptionsJson);
  const publicKey = creationOptions;
  publicKey.challenge = base64ToUint8Array(creationOptions.challenge);
  publicKey.user.id = base64ToUint8Array(creationOptions.user.id);
  if (creationOptions.excludeCredentials) {
    const excludedCredentials = [];
    for (let value of creationOptions.excludeCredentials) {
      let excludedCredential = value;
      excludedCredential.id = base64ToUint8Array(value.id);
      excludedCredentials.push(excludedCredential);
    }
    publicKey.excludeCredentials = excludedCredentials;
  }

  // eslint-disable-next-line compat/compat
  navigator.credentials.create({
    publicKey: publicKey
  }).then(credential => {
    const credentialJson = JSON.stringify({
      id: credential.id,
      rawId: arrayBufferToBase64(credential.rawId),
      type: credential.type,
      response: {
        clientDataJSON: arrayBufferToBase64(credential.response.clientDataJSON),
        attestationObject: arrayBufferToBase64(credential.response.attestationObject)
      }
    });
    $input.val(credentialJson);
    $form.trigger('submit');
  }).catch(error => Functions.ajaxShowMessage(error, false, 'error'));
};

/**
 * @param {JQuery<HTMLElement>} $input
 *
 * @return {void}
 */
const handleRequest = $input => {
  const $form = $input.parents('form');
  $form.find('input[type=submit]').hide();
  const requestOptionsJson = $input.attr('data-request-options');
  const requestOptions = JSON.parse(requestOptionsJson);
  const publicKey = requestOptions;
  publicKey.challenge = base64ToUint8Array(requestOptions.challenge);
  if (requestOptions.allowCredentials) {
    const allowedCredentials = [];
    for (let value of requestOptions.allowCredentials) {
      let allowedCredential = value;
      allowedCredential.id = base64ToUint8Array(value.id);
      allowedCredentials.push(allowedCredential);
    }
    publicKey.allowCredentials = allowedCredentials;
  }

  // eslint-disable-next-line compat/compat
  navigator.credentials.get({
    publicKey: publicKey
  }).then(credential => {
    const credentialJson = JSON.stringify({
      id: credential.id,
      rawId: arrayBufferToBase64(credential.rawId),
      type: credential.type,
      response: {
        authenticatorData: arrayBufferToBase64(credential.response.authenticatorData),
        clientDataJSON: arrayBufferToBase64(credential.response.clientDataJSON),
        signature: arrayBufferToBase64(credential.response.signature),
        userHandle: arrayBufferToBase64(credential.response.userHandle)
      }
    });
    $input.val(credentialJson);
    $form.trigger('submit');
  }).catch(error => Functions.ajaxShowMessage(error, false, 'error'));
};
AJAX.registerOnload('webauthn.js', function () {
  if (!navigator.credentials || !navigator.credentials.create || !navigator.credentials.get || !window.PublicKeyCredential) {
    Functions.ajaxShowMessage(Messages.webAuthnNotSupported, false, 'error');
    return;
  }
  const $creationInput = $('#webauthn_creation_response');
  if ($creationInput.length > 0) {
    handleCreation($creationInput);
  }
  const $requestInput = $('#webauthn_request_response');
  if ($requestInput.length > 0) {
    handleRequest($requestInput);
  }
});