Function c20pImportKey

lib/internal/crypto/chacha20_poly1305.js:62–107

(
  algorithm,
  format,
  keyData,
  extractable,
  usages)

}

function c20pImportKey(
  algorithm,
  format,
  keyData,
  extractable,
  usages) {
  const { name } = algorithm;

  const usagesSet = validateKeyUsages(
    usages, kUsages, name);

  let handle;
  switch (format) {
    case 'KeyObjectHandle': {
      handle = keyData;
      break;
    }
    case 'raw-secret': {
      handle = importSecretKey(keyData);
      break;
    }
    case 'jwk': {
      validateJwk(keyData, 'oct', extractable, usagesSet, 'enc');

      handle = importJwkSecretKey(keyData);

      if (keyData.alg !== undefined && keyData.alg !== 'C20P') {
        throw lazyDOMException(
          'JWK "alg" does not match the requested algorithm',
          'DataError');
      }

      break;
    }
    default:
      return undefined;
  }

  validateKeyLength(handle.getSymmetricKeySize() * 8);

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

module.exports = {
  c20pCipher,