File: mongoc_client_encryption_datakey_opts_set_masterkey.rst

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:man_page: mongoc_client_encryption_datakey_opts_set_masterkey

mongoc_client_encryption_datakey_opts_set_masterkey()
=====================================================

Synopsis
--------

.. code-block:: c

   void
   mongoc_client_encryption_datakey_opts_set_masterkey (
      mongoc_client_encryption_datakey_opts_t *opts, const bson_t *masterkey);

Identifies the masterkey for the Key Management Service (KMS) provider used to encrypt a new data key.

Parameters
----------

* ``opts``: A :symbol:`mongoc_client_encryption_datakey_opts_t`
* ``masterkey``: A :symbol:`bson_t` document describing the KMS provider specific masterkey.

Description
-----------

Setting the masterkey is required if using AWS KMS, and ``masterkey`` must have the form:

.. code-block:: javascript

   {
      region: <string>, // Required.
      key: <string>, // Required. The Amazon Resource Name (ARN) to the AWS customer master key (CMK).
      endpoint: <string> // Optional. An alternate host identifier to send KMS requests to. May include port number.
   }

The value of "endpoint" is a host name with optional port number separated by a colon. E.g. "kms.us-east-1.amazonaws.com" or "kms.us-east-1.amazonaws.com:443"

This function is only applicable for the "aws" KMS provider. It is not applicable for creating data keys with the "local" KMS provider (as configured in :symbol:`mongoc_client_encryption_opts_set_kms_providers()`).