Function ensureSHA

lib/internal/crypto/webidl.js:70–76

* @param {string | object} V - The hash algorithm identifier (string or object). * @param {string} label - The dictionary name for the error message.

(V, label)

 * @param {string} label - The dictionary name for the error message.
 */
function ensureSHA(V, label) {
  const name = typeof V === 'string' ? V : V.name;
  if (typeof name !== 'string' ||
      !StringPrototypeStartsWith(StringPrototypeToLowerCase(name), 'sha'))
    throw lazyDOMException(
      `Only SHA hashes are supported in ${label}`, 'NotSupportedError');
}

converters.AlgorithmIdentifier = (V, opts) => {
  // Union for (object or DOMString)