Simple mongosh script to insert a document into MongoDB with Client-side Field-level Encryption and a local KMS.

mongosh-fle-local-kms.js

// To run this script you can start the shell with `mongosh --nodb`

// Wrap everything into a function so we don't
// affect the shell's scope
(function insertTestData() {
    // Config DB and Collection names
    const dbName = '<TEST_DBNAME>';
    const collectionName = '<TEST_COLLNAME>';
    const mongoDBConnectionString = '<MONGODB_CONNECTION_STRING>';

    // Configure KMS Providers
    // Using a local one
    const kmsProviders = {
        local: { key: BinData(0, 'kh4Gv2N8qopZQMQYMEtww/AkPsIrXNmEMxTrs3tUoTQZbZu4msdRUaR8U5fXD7A7QXYHcEvuu4WctJLoT+NvvV3eeIg3MD+K8H9SR794m/safgRHdIfy6PD+rFpvmFbY') }
    };
    // Get a new Mongo object with the KMS provider configuration
    const keyMongo = Mongo(mongoDBConnectionString, {
        keyVaultNamespace: 'encryption.__keyVault',
        kmsProviders
    });

    // Get a reference to the Key Vault
    const keyVault = keyMongo.getKeyVault();


    // Generate a key
    // In this example, we will use the same key for all the test documents.
    // However, this is a good use case for assigning one key per customer.
    const keyId = keyVault.createKey('local', '');

    // Schema map for auto encryption
    // See https://docs.mongodb.com/manual/core/security-automatic-client-side-encryption/ for
    // the details on how automatic encryption works.
    // The automatic feature of field level encryption is only available in
    // MongoDB 4.2+ Enterprise and MongoDB Atlas 4.2+ clusters.
    const schemaMap = {};
    schemaMap[`${dbName}.${collectionName}`] = {
        bsonType: 'object',
        properties: {
            birthDate: {
                encrypt: {
                    keyId: [keyId],
                    bsonType: 'string',
                    algorithm: 'AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic'
                }
            },
            email: {
                encrypt: {
                    keyId: [keyId],
                    bsonType: 'string',
                    algorithm: 'AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic'
                }
            },
            phone: {
                encrypt: {
                    keyId: [keyId],
                    bsonType: 'string',
                    algorithm: 'AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic'
                }
            },
            bankAccount: {
                encrypt: {
                    keyId: [keyId],
                    bsonType: 'object',
                    algorithm: 'AEAD_AES_256_CBC_HMAC_SHA_512-Random'
                }
            }
        }
    };
    // Create a new instance of Mongo connected to the same
    // cluster but this time with the schemaMap configured as well.
    const autoMongo = Mongo(mongoDBConnectionString, {
        keyVaultNamespace: 'encryption.__keyVault',
        kmsProviders,
        schemaMap
    });

    sleep(1000);


    // Generate a bunch of fake customer data...
    const autoMongoDb = autoMongo.getDB(dbName);
    // ... but first clean up old test data ...
    autoMongoDb.getCollection(collectionName).drop();
    // ... finally, store the new data into the destination collection.
    // Fields that the schema map indicates they should be encrypted
    // will be encrypted client-side and then stored encrypted in MongoDB
    autoMongoDb.getCollection(collectionName).insertOne({
        name: {
            first: 'Mia',
            last: 'Rolfson'
        },
        email: 'mia4@example.com',
        phone: '(123) 456-789',
        company: {
            name: 'Ernser - Brekke'
        },
        address: {
            zip: '31854',
            street: '3196 Era Place',
            state: 'NJ'
        },
        birthDate: '1980-02-18',
        bankAccount: {
            name: 'Auto Loan Account',
            account: '17545520',
            bic: 'EEAACUD1411'
        },
        birthYear: 1980
    });
    
    // `email` is encrypted but I can still use it in a filter
    // the document resulting from this find will have all the fields automatically decrypted
    return autoMongoDb.getCollection(collectionName).find({email: 'mia4@example.com'});
})();