SYNOPSIS

          bool
          mongoc_client_enable_auto_encryption (mongoc_client_t *client,
                                                mongoc_auto_encryption_opts_t* opts,
                                                bson_error_t* error);

       Enable  automatic  In-Use Encryption on a mongoc_client_t <>. Requires libmongoc to be built with support
       for In-Use Encryption. See In-Use Encryption  <https://www.mongodb.com/docs/languages/c/c-driver/current/
       libmongoc/guides/in-use-encryption/> for instructions to enable In-Use Encryption in libmongoc.

       Automatic  encryption  is  an  enterprise  only  feature that only applies to operations on a collection.
       Automatic encryption is not supported for operations on a database or view, and operations that  are  not
       bypassed  will  result  in  error.  To  bypass  automatic encryption for all operations, bypass automatic
       encryption with mongoc_auto_encryption_opts_set_bypass_auto_encryption() <> in opts.

       Automatic encryption requires the  authenticated  user  to  have  the  listCollections  privilege  action
       <https://www.mongodb.com/docs/manual/reference/command/listCollections/#dbcmd.listCollections>.

       Enabling  automatic  encryption  reduces  the  maximum  message  size and may have a negative performance
       impact.

       Only  applies  to   a   single-threaded   mongoc_client_t   <>.   To   use   with   client   pools,   see
       mongoc_client_pool_enable_auto_encryption() <>.

PARAMETERS

       • client: A mongoc_client_t <>.

       • opts: A required mongoc_auto_encryption_opts_t <>.

       • error: A bson_error_t <https://www.mongoc.org/libbson/current/bson_error_t.html> which is set on error.

RETURNS

       True on success. False on error. On error, error is set.

       See also:
          mongoc_auto_encryption_opts_t <>

          mongoc_client_pool_enable_auto_encryption() <>

          In-Use Encryption <https://www.mongodb.com/docs/languages/c/c-driver/current/libmongoc/guides/in-use-encryption/> for libmongoc

          The MongoDB Manual for Client-Side Field Level Encryption <https://www.mongodb.com/docs/manual/core/security-client-side-encryption/>

          The MongoDB Manual for Queryable Encryption <https://www.mongodb.com/docs/manual/core/queryable-encryption/>

Author

       MongoDB, Inc

Copyright

       2009-present, MongoDB, Inc.

2.2.0                                             Nov 26, 2025           MONGOC_CLIENT_ENABLE_AUTO_ENCRYPTION(3)