Method checkSha384

extensions/amp-script/0.1/amp-script.js:624–638

* Checks if `sha384(script)` exists in `meta[name="amp-script-src"]` element * in document head. * * @param {string} script The script contents. * @param {string} debugId An element identifier for error messages. * @return {!Promise}

(script, debugId)

   * @return {!Promise}
   */
  checkSha384(script, debugId) {
    const bytes = utf8Encode(script);
    return this.crypto_.sha384Base64(bytes).then((hash) => {
      if (!hash || !this.sources_.includes('sha384-' + hash)) {
        // TODO(#24266): Refactor to %s interpolation when error string
        // extraction is ready.
        throw user().createError(
          TAG,
          `Script hash not found or incorrect for ${debugId}. You must include <meta name="amp-script-src" content="sha384-${hash}">. ` +
            `During development, you can disable this check by adding the "data-ampdevmode" attribute to ${debugId}, or the root html node` +
            'See https://amp.dev/documentation/components/amp-script/#script-hash.'
        );
      }
    });
  }

  /**
   * Adds `size` to current total. Returns true if new total is <= size cap.