app/access-control/controllers/certificate-modal-csr-download.html

<div class="uib-modal__content">
  <div class="modal-header">
    <h2 class="modal-title" id="modal_label">
      Certificate Signing Request (CSR)
    </h2>
    <button
      type="button"
      class="btn  btn--close"
      ng-click="$dismiss()"
      aria-label="close">
      <icon file="icon-close.svg" aria-hidden="true"></icon>
    </button>
  </div>
    <div class="modal-body">
      <span id="csrCode" class="add-csr__container-csr-code">{{ csrCode }}</span>
    </div>
    <div class="modal-footer">
      <button
        type="button"
        class="btn btn-secondary"
        clipboard
        text="csrCode"
        on-copied="copySuccess(event)"
        on-error="copyfailed(err)">
        <span ng-if="!copied">Copy</span>
        <span ng-if="copied">
          <icon aria-hidden="true" file="icon-check.svg"></icon>
          <span>Copied</span>
        </span>
      </button>
      <button
        type="button"
        class="btn btn-primary">
        <a ng-href="data:text/json;charset=utf-8,{{ csrCode }}"
          download="csrCode.txt"
          class="add-csr__text-download">
          Download
        </a>
      </button>
    </div>
  </div>