void

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 202MONGOC_CLIENT_ENCRYPTI...EY_OPTS_SET_KEYMATERIAL(3)

       Key  material  is  used  to  encrypt  and  decrypt  data. If custom key material is not provided, the key
       material for the new data key is generated from a cryptographically secure random device.

       • opts: A mongoc_client_encryption_datakey_opts_t

       • data: A pointer to the bytes constituting the custom key material.

       • len: The length of the bytes constituting the custom key material.

          void
          mongoc_client_encryption_datakey_opts_set_keymaterial (
             mongoc_client_encryption_datakey_opts_t *opts,
             const uint8_t *data,
             uint32_t len);

       Sets the custom key material to be used by the data key for encryption and decryption.