public DataKey decryptDataKey()

in src/main/java/com/amazonaws/encryptionsdk/jce/KeyStoreProvider.java [177:202]

• 25 lines of code
• 6 McCabe index (conditional complexity)

  public DataKey<JceMasterKey> decryptDataKey(
      final CryptoAlgorithm algorithm,
      final Collection<? extends EncryptedDataKey> encryptedDataKeys,
      final Map<String, String> encryptionContext)
      throws UnsupportedProviderException, AwsCryptoException {
    final List<Exception> exceptions = new ArrayList<>();
    for (final EncryptedDataKey edk : encryptedDataKeys) {
      try {
        if (canProvide(edk.getProviderId())) {
          final String alias = new String(edk.getProviderInformation(), StandardCharsets.UTF_8);
          if (keystore_.isKeyEntry(alias)) {
            final DataKey<JceMasterKey> result =
                getMasterKey(alias)
                    .decryptDataKey(algorithm, Collections.singletonList(edk), encryptionContext);
            if (result != null) {
              return result;
            }
          }
        }
      } catch (final Exception ex) {
        exceptions.add(ex);
      }
    }

    throw buildCannotDecryptDksException(exceptions);
  }