Function aesImportKey

lib/internal/crypto/aes.js:198–248

(
  algorithm,
  format,
  keyData,
  extractable,
  usages)

}

function aesImportKey(
  algorithm,
  format,
  keyData,
  extractable,
  usages) {
  const { name } = algorithm;
  const usagesSet = validateKeyUsages(usages, kUsages[name], name);

  let handle;
  let length;
  switch (format) {
    case 'KeyObjectHandle': {
      length = keyData.getSymmetricKeySize() * 8;
      validateKeyLength(length);
      handle = keyData;
      break;
    }
    case 'raw-secret':
    case 'raw': {
      if (format === 'raw' && name === 'AES-OCB') {
        return undefined;
      }
      length = keyData.byteLength * 8;
      validateKeyLength(length);
      handle = importSecretKey(keyData);
      break;
    }
    case 'jwk': {
      validateJwk(keyData, 'oct', extractable, usagesSet, 'enc');
      handle = importJwkSecretKey(keyData);
      length = handle.getSymmetricKeySize() * 8;
      validateKeyLength(length);
      if (keyData.alg !== undefined) {
        if (keyData.alg !== getAlgorithmName(algorithm.name, length))
          throw lazyDOMException(
            'JWK "alg" does not match the requested algorithm',
            'DataError');
      }
      break;
    }
    default:
      return undefined;
  }

  return new InternalCryptoKey(
    handle,
    { name, length },
    getUsagesMask(usagesSet),
    extractable);
}

module.exports = {
  aesCipher,