A JavaScript to make use of the client-side field-level encryptions, create the MongoDB client objects, and create data encryption keys for SSN and Mobile fields

csfle-create-clientobj.js

// Create a mongo clients for plain text operations and another with client-side Field-Level encryption options
var csfleOptions = {
  "keyVaultNamespace" : "encryption.__dataKeys",
  "kmsProviders" : {
    "local" : {
      "key" : BinData(0, LOCAL_KEY)
    }
  },
  "schemaMap" : {}
};
var plainClient = Mongo("mongodb://localhost:28000");
var csfleClient = Mongo("mongodb://localhost:28000", csfleOptions);

// Create the data encryption keys on key vault for encrypting ssn, mobile fields
const altKeyNameSSN = "akn-ssn";
const altKeyNameMobile = "akn-mobile";
if  (csfleClient.getKeyVault().getKeyByAltName(altKeyNameSSN).toArray().length === 0) {
    csfleClient.getKeyVault().createKey("local", "", [altKeyNameSSN]);
}
if  (csfleClient.getKeyVault().getKeyByAltName(altKeyNameMobile).toArray().length === 0) {
    csfleClient.getKeyVault().createKey("local", "", [altKeyNameMobile]);
}

// Search the encryption keys using alt key names and load the _id / UUID
var SSN_ENCRYPTION_KEY_UUID  = csfleClient.getKeyVault().getKeyByAltName(altKeyNameSSN).toArray()[0]._id;
var MOBILE_ENCRYPTION_KEY_UUID = csfleClient.getKeyVault().getKeyByAltName(altKeyNameMobile).toArray()[0]._id;

// load the database objects for both the clients
var csfleDB = csfleClient.getDB("health_care_app");
var plainDB = plainClient.getDB("health_care_app");