open-vault/ui/app/templates/components/transit-key-action/hmac.hbs

<form {{action 'doSubmit' (hash input=input algorithm=algorithm key_version=key_version) on="submit"}}>
  {{#if hmac}}
    <div class="box is-sideless is-fullwidth is-marginless">
      <div class="field">
        <label for="hmac" class="is-label">HMAC</label>
        <div class="control">
          <textarea readonly class="textarea" id="hmac">{{hmac}}</textarea>
        </div>
      </div>
    </div>
    <div class="field is-grouped box is-fullwidth is-bottomless">
      <div class="control">
        {{#copy-button
          clipboardTarget="#hmac"
          class="button is-primary"
          buttonType="button"
          success=(action (set-flash-message 'HMAC copied!'))
        }}
          Copy
        {{/copy-button}}
      </div>
      <div class="control">
        <button {{action 'onClear'}} type="button" class="button">
          Back
        </button>
      </div>
    </div>
  {{else}}
    <div class="box is-sideless is-fullwidth is-marginless">
      <NamespaceReminder @mode="perform" @noun="HMAC creation" />
      {{key-version-select
        key=key
        onVersionChange=(action (mut key_version))
        key_version=key_version
      }}
      <div class="field">
        <label for="input" class="is-label">
          Input
        </label>
        <div class="control is-relative">
          {{textarea id="input" name="input" value=input class="textarea" data-test-transit-input="input"}}
          {{b64-toggle value=input isInput=false data-test-transit-b64-toggle="input"}}
        </div>
      </div>
      <div class="field">
        <label for="algorithm" class="is-label">Hash Algorithm</label>
        <div class="control is-expanded">
          <div class="select is-fullwidth">
            <select
             name="algorithm"
             id="algorithm"
             onchange={{action (mut algorithm) value="target.value"}}
             >
               {{#each (sha2-digest-sizes) as |algo|}}
                 <option selected={{if algorithm (eq algorithm algo)}} value={{algo}}>
                   <code>{{algo}}</code>
                 </option>
               {{/each}}
            </select>
          </div>
        </div>
      </div>
    </div>
    <div class="field is-grouped box is-fullwidth is-bottomless">
      <div class="control">
        <button type="submit" class="button is-primary">
          HMAC
        </button>
      </div>
    </div>
  {{/if}}
</form>