Function getUsagesMask

lib/internal/crypto/util.js:863–872

* Returns a bit mask representing the usages from `usageSet`. * @param {SafeSet } usageSet * @returns {number}

(usageSet)

 * @returns {number}
 */
function getUsagesMask(usageSet) {
  // No usages is a valid state for some public keys, represented by a
  // zero mask.
  if (usageSet.size === 0) return 0;
  let mask = 0;
  for (const usage of usageSet) {
    mask |= kUsageMasks[usage];
  }
  return mask;
}

/**
 * Returns whether `mask` contains `usage`.