src/main/java/com/amazonaws/encryptionsdk/kmssdkv2/KmsMasterKeyProvider.java [364:383]:
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  public DataKey<KmsMasterKey> decryptDataKey(
      final CryptoAlgorithm algorithm,
      final Collection<? extends EncryptedDataKey> encryptedDataKeys,
      final Map<String, String> encryptionContext)
      throws AwsCryptoException {
    final List<Exception> exceptions = new ArrayList<>();
    for (final EncryptedDataKey edk : encryptedDataKeys) {
      if (canProvide(edk.getProviderId())) {
        try {
          final String keyArn = new String(edk.getProviderInformation(), StandardCharsets.UTF_8);
          // This will throw if we can't use this key for whatever reason
          return getMasterKey(keyArn)
              .decryptDataKey(algorithm, singletonList(edk), encryptionContext);
        } catch (final Exception ex) {
          exceptions.add(ex);
        }
      }
    }
    throw buildCannotDecryptDksException(exceptions);
  }
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src/main/java/com/amazonaws/encryptionsdk/kms/KmsMasterKeyProvider.java [490:509]:
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  public DataKey<KmsMasterKey> decryptDataKey(
      final CryptoAlgorithm algorithm,
      final Collection<? extends EncryptedDataKey> encryptedDataKeys,
      final Map<String, String> encryptionContext)
      throws AwsCryptoException {
    final List<Exception> exceptions = new ArrayList<>();
    for (final EncryptedDataKey edk : encryptedDataKeys) {
      if (canProvide(edk.getProviderId())) {
        try {
          final String keyArn = new String(edk.getProviderInformation(), StandardCharsets.UTF_8);
          // This will throw if we can't use this key for whatever reason
          return getMasterKey(keyArn)
              .decryptDataKey(algorithm, singletonList(edk), encryptionContext);
        } catch (final Exception ex) {
          exceptions.add(ex);
        }
      }
    }
    throw buildCannotDecryptDksException(exceptions);
  }
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