Use Automatic Client-Side Field Level Encryption with KMIP

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Overview

Before You Get Started
Set Up the KMS
Configure your KMIP-compliant key provider
Specify your Certificates
Create the Application
Create a Unique Index on Your Key Vault Collection
Create a Data Encryption Key
Configure the MongoClient
Insert a Document with Encrypted Fields
Retrieve Your Encrypted Document
Learn More

Overview

This guide shows you how to build a Client-Side Field Level Encryption (CSFLE)-enabled application using a Key Management Interoperability Protocol (KMIP)-compliant key provider.

After you complete the steps in this guide, you should have:

A Customer Master Key hosted on a KMIP-compliant key provider.
A working client application that inserts encrypted documents using your Customer Master Key.

Before You Get Started

To complete and run the code in this guide, you need to set up your development environment as shown in the Installation Requirements page.

Throughout this guide, code examples use placeholder text. Before you run the examples, substitute your own values for these placeholders.

For example:

dek_id := "<Your Base64 DEK ID>"

You would replace everything between quotes with your DEK ID.

dek_id := "abc123"

Select the programming language for which you want to see code examples for from the Select your language dropdown menu on the right side of the page.

Tip

See: Full Application

To view the complete runnable application code for this tutorial, go to the following link:

Complete C# Application

Complete Go Application

Complete Java Application

Complete Node.js Application

Complete Python Application

Set Up the KMS

Note

mongod reads the KMIP configuration at startup. By default, the server uses KMIP protocol version 1.2.

To connect to a version 1.0 or 1.1 KMIP server, use the useLegacyProtocol setting.

// You are viewing the C# driver code examples.
// Use the dropdown menu to select a different driver.

// You are viewing the Golang driver code examples.
// Use the dropdown menu to select a different driver.

// You are viewing the Java synchronous driver code examples.
// Use the dropdown menu to select a different driver.

// You are viewing the Node.js driver code examples.
// Use the dropdown menu to select a different driver.

# You are viewing the Python driver code examples.
# Use the dropdown menu to select a different driver.

Configure your KMIP-compliant key provider

To connect a MongoDB driver client to your KMIP-compliant key provider, you must configure your KMIP-compliant key provider such that it accepts your client's TLS certificate.

Consult the documentation for your KMIP-compliant key provider for information on how to accept your client certificate.

Specify your Certificates

Your client must connect to your KMIP-compliant key provider through TLS and present a client certificate that your KMIP-compliant key provider accepts:

MakeDataKey.cs

var tlsOptions = new Dictionary<string, SslSettings>();
var sslSettings = new SslSettings();
var clientCertificate = new X509Certificate2("<path to your pkcs12 client certificate file>");
sslSettings.ClientCertificates = new List<X509Certificate>() {
    clientCertificate,
 };
tlsOptions.Add(provider, sslSettings);

Important

Your client certificate must be in pcks12 format. You can convert your certificate using openssl with the following command:

openssl pcks12 -export -out "<new pcks12 certificate>" -in "<certificate to convert>" \
-name "<new certificate name>" -password "<new certificate password>"

make-data-key.go

tlsConfig := make(map[string]*tls.Config)
tlsOpts := map[string]interface{}{
	"tlsCertificateKeyFile": "<path to your client certificate file>",
	"tlsCAFile":             "<path to file containing your Certificate Authority certificate>",
}
kmipConfig, err := options.BuildTLSConfig(tlsOpts)
tlsConfig["kmip"] = kmipConfig

Important

You must use certificates with ECDSA keys when using the Go driver.

Specify the following Java system properties to configure your client's TLS connection:

-Djavax.net.ssl.keyStoreType=pkcs12
-Djavax.net.ssl.keyStore=<path to pkcs12 KeyStore containing your client certificate>
-Djavax.net.ssl.keyStorePassword=<KeyStore password>

Note

Configure Client With SSLContext

If you would rather configure your client application using an SSL context, use the kmsProviderSslContextMap method.

make_data_key.js

const tlsOptions = {
  kmip: {
    tlsCAFile:
      "<path to file containing your Certificate Authority certificate>",
    tlsCertificateKeyFile: "<path to your client certificate file>",
  },
};

make_data_key.py

tls_options = {
    "kmip": {
        "tlsCAFile": "<path to file containing your Certificate Authority certificate>",
        "tlsCertificateKeyFile": "<path to your client certificate file>",
    }
}

Create the Application

Select the tab that corresponds to the MongoDB driver you are using in your application to see relevant code samples.

Create a Unique Index on Your Key Vault Collection

Create a unique index on the keyAltNames field in your encryption.__keyVault collection.

Select the tab corresponding to your preferred MongoDB driver:

MakeDataKey.cs

var connectionString = "<Your MongoDB URI>";
var keyVaultNamespace = CollectionNamespace.FromFullName("encryption.__keyVault");
var keyVaultClient = new MongoClient(connectionString);
var indexOptions = new CreateIndexOptions<BsonDocument>();
indexOptions.Unique = true;
indexOptions.PartialFilterExpression = new BsonDocument { { "keyAltNames", new BsonDocument { { "$exists", new BsonBoolean(true) } } } };
var builder = Builders<BsonDocument>.IndexKeys;
var indexKeysDocument = builder.Ascending("keyAltNames");
var indexModel = new CreateIndexModel<BsonDocument>(indexKeysDocument, indexOptions);
var keyVaultDatabase = keyVaultClient.GetDatabase(keyVaultNamespace.DatabaseNamespace.ToString());
// Drop the Key Vault Collection in case you created this collection
// in a previous run of this application.  
keyVaultDatabase.DropCollection(keyVaultNamespace.CollectionName);
// Drop the database storing your encrypted fields as all
// the DEKs encrypting those fields were deleted in the preceding line.
keyVaultClient.GetDatabase("medicalRecords").DropCollection("patients");
var keyVaultCollection = keyVaultDatabase.GetCollection<BsonDocument>(keyVaultNamespace.CollectionName.ToString());
keyVaultCollection.Indexes.CreateOne(indexModel);

insert-encrypted-document.go

uri := "<Your MongoDB URI>"
keyVaultClient, err := mongo.Connect(context.TODO(), options.Client().ApplyURI(uri))
if err != nil {
	return fmt.Errorf("Connect error for regular client: %v", err)
}
defer func() {
	_ = keyVaultClient.Disconnect(context.TODO())
}()
keyVaultColl := "__keyVault"
keyVaultDb := "encryption"
keyVaultNamespace := keyVaultDb + "." + keyVaultColl
keyVaultIndex := mongo.IndexModel{
	Keys: bson.D{{"keyAltNames", 1}},
	Options: options.Index().
		SetUnique(true).
		SetPartialFilterExpression(bson.D{
			{"keyAltNames", bson.D{
				{"$exists", true},
			}},
		}),
}
// Drop the Key Vault Collection in case you created this collection
// in a previous run of this application.
if err = keyVaultClient.Database(keyVaultDb).Collection(keyVaultColl).Drop(context.TODO()); err != nil {
	log.Fatalf("Collection.Drop error: %v", err)
}
// Drop the database storing your encrypted fields as all
// the DEKs encrypting those fields were deleted in the preceding line.
if err = keyVaultClient.Database("medicalRecords").Collection("patients").Drop(context.TODO()); err != nil {
	log.Fatalf("Collection.Drop error: %v", err)
}
_, err = keyVaultClient.Database(keyVaultDb).Collection(keyVaultColl).Indexes().CreateOne(context.TODO(), keyVaultIndex)
if err != nil {
	panic(err)
}

MakeDataKey.java

String connectionString = "<Your MongoDB URI>";
String keyVaultDb = "encryption";
String keyVaultColl = "__keyVault";
String keyVaultNamespace = keyVaultDb + "." + keyVaultColl;
MongoClient keyVaultClient = MongoClients.create(connectionString);
// Drop the Key Vault Collection in case you created this collection
// in a previous run of this application.
keyVaultClient.getDatabase(keyVaultDb).getCollection(keyVaultColl).drop();
// Drop the database storing your encrypted fields as all
// the DEKs encrypting those fields were deleted in the preceding line.
keyVaultClient.getDatabase("medicalRecords").getCollection("patients").drop();
MongoCollection keyVaultCollection = keyVaultClient.getDatabase(keyVaultDb).getCollection(keyVaultColl);
IndexOptions indexOpts = new IndexOptions().partialFilterExpression(new BsonDocument("keyAltNames", new BsonDocument("$exists", new BsonBoolean(true) ))).unique(true);
keyVaultCollection.createIndex(new BsonDocument("keyAltNames", new BsonInt32(1)), indexOpts);
keyVaultClient.close();

make_data_key.js

const uri = "<Your Connection String>";
const keyVaultDatabase = "encryption";
const keyVaultCollection = "__keyVault";
const keyVaultNamespace = `${keyVaultDatabase}.${keyVaultCollection}`;
const keyVaultClient = new MongoClient(uri);
await keyVaultClient.connect();
const keyVaultDB = keyVaultClient.db(keyVaultDatabase);
// Drop the Key Vault Collection in case you created this collection
// in a previous run of this application.
await keyVaultDB.dropDatabase();
// Drop the database storing your encrypted fields as all
// the DEKs encrypting those fields were deleted in the preceding line.
await keyVaultClient.db("medicalRecords").dropDatabase();
const keyVaultColl = keyVaultDB.collection(keyVaultCollection);
await keyVaultColl.createIndex(
  { keyAltNames: 1 },
  {
    unique: true,
    partialFilterExpression: { keyAltNames: { $exists: true } },
  }
);

make_data_key.py

connection_string = "<your connection string here>"
key_vault_coll = "__keyVault"
key_vault_db = "encryption"
key_vault_namespace = f"{key_vault_db}.{key_vault_coll}"
key_vault_client = MongoClient(connection_string)
# Drop the Key Vault Collection in case you created this collection
# in a previous run of this application.
key_vault_client.drop_database(key_vault_db)
# Drop the database storing your encrypted fields as all
# the DEKs encrypting those fields were deleted in the preceding line.
key_vault_client["medicalRecords"].drop_collection("patients")
key_vault_client[key_vault_db][key_vault_coll].create_index(
    [("keyAltNames", ASCENDING)],
    unique=True,
    partialFilterExpression={"keyAltNames": {"$exists": True}},
)

Create a Data Encryption Key

Add your Endpoint

Specify the URI endpoint of your KMIP-compliant key provider:

MakeDataKey.cs

var kmsProviders = new Dictionary<string, IReadOnlyDictionary<string, object>>();
var provider = "kmip";
var kmipKmsOptions = new Dictionary<string, object>
{
   { "endpoint", "<endpoint for your KMIP-compliant key provider>" },
};
kmsProviders.Add(provider, kmipKmsOptions);

make-data-key.go

provider := "kmip"
kmsProviders := map[string]map[string]interface{}{
	provider: {
		"endpoint": "<endpoint for your KMIP-compliant key provider>",
	},
}

MakeDataKey.java

String kmsProvider = "kmip";
Map<String, Map<String, Object>> kmsProviders = new HashMap<String, Map<String, Object>>();
Map<String, Object> providerDetails = new HashMap<>();
providerDetails.put("endpoint", "<endpoint for your KMIP-compliant key provider>");
kmsProviders.put(kmsProvider, providerDetails);

make_data_key.js

const provider = "kmip";
const kmsProviders = {
  kmip: {
    endpoint: "<endpoint for your KMIP-compliant key provider>",
  },
};

make_data_key.py

provider = "kmip"
kms_providers = {
    provider: {"endpoint": "<endpoint for your KMIP-compliant key provider>"}
}

Add Your Key Information

The following code prompts your KMIP-compliant key provider to automatically generate a Customer Master Key:

MakeDataKey.cs

var dataKeyOptions = new DataKeyOptions(
    masterKey: new BsonDocument { } // an empty key object prompts your KMIP-compliant key provider to generate a new Customer Master Key
);

make-data-key.go

masterKey := map[string]interface{}{} // an empty key object prompts your KMIP-compliant key provider to generate a new Customer Master Key

MakeDataKey.java

BsonDocument masterKeyProperties = new BsonDocument(); // an empty key object prompts your KMIP-compliant key provider to generate a new Customer Master Key

make_data_key.js

const masterKey = {}; // an empty key object prompts your KMIP-compliant key provider to generate a new Customer Master Key

make_data_key.py

master_key = (
    {}
)  # an empty key object prompts your KMIP-compliant key provider to generate a new Customer Master Key

Generate your Data Encryption Key

MakeDataKey.cs

var clientEncryptionOptions = new ClientEncryptionOptions(
    keyVaultClient: keyVaultClient,
    keyVaultNamespace: keyVaultNamespace,
    kmsProviders: kmsProviders,
    tlsOptions: tlsOptions
    );
var clientEncryption = new ClientEncryption(clientEncryptionOptions);
var dataKeyId = clientEncryption.CreateDataKey(provider, dataKeyOptions, CancellationToken.None);
var dataKeyIdBase64 = Convert.ToBase64String(GuidConverter.ToBytes(dataKeyId, GuidRepresentation.Standard));
Console.WriteLine($"DataKeyId [base64]: {dataKeyIdBase64}");

make-data-key.go

clientEncryptionOpts := options.ClientEncryption().SetKeyVaultNamespace(keyVaultNamespace).
	SetKmsProviders(kmsProviders).SetTLSConfig(tlsConfig)
clientEnc, err := mongo.NewClientEncryption(keyVaultClient, clientEncryptionOpts)
if err != nil {
	return fmt.Errorf("NewClientEncryption error %v", err)
}
defer func() {
	_ = clientEnc.Close(context.TODO())
}()
dataKeyOpts := options.DataKey().
	SetMasterKey(masterKey)
dataKeyID, err := clientEnc.CreateDataKey(context.TODO(), provider, dataKeyOpts)
if err != nil {
	return fmt.Errorf("create data key error %v", err)
}
fmt.Printf("DataKeyId [base64]: %s\n", base64.StdEncoding.EncodeToString(dataKeyID.Data))

MakeDataKey.java

ClientEncryptionSettings clientEncryptionSettings = ClientEncryptionSettings.builder()
        .keyVaultMongoClientSettings(MongoClientSettings.builder()
                .applyConnectionString(new ConnectionString(connectionString))
                .build())
        .keyVaultNamespace(keyVaultNamespace)
        .kmsProviders(kmsProviders)
        .build();
MongoClient regularClient = MongoClients.create(connectionString);
ClientEncryption clientEncryption = ClientEncryptions.create(clientEncryptionSettings);
BsonBinary dataKeyId = clientEncryption.createDataKey(kmsProvider, new DataKeyOptions().masterKey(masterKeyProperties));
String base64DataKeyId = Base64.getEncoder().encodeToString(dataKeyId.getData());
System.out.println("DataKeyId [base64]: " + base64DataKeyId);
clientEncryption.close();

make_data_key.js

const client = new MongoClient(uri, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});
await client.connect();
const encryption = new ClientEncryption(client, {
  keyVaultNamespace,
  kmsProviders,
  tlsOptions,
});
const key = await encryption.createDataKey(provider, {
  masterKey: masterKey,
});
console.log("DataKeyId [base64]: ", key.toString("base64"));
await keyVaultClient.close();
await client.close();

make_data_key.py

key_vault_database = "encryption"
key_vault_collection = "__keyVault"
key_vault_namespace = f"{key_vault_database}.{key_vault_collection}"
client = MongoClient(connection_string)
client_encryption = ClientEncryption(
    kms_providers,  # pass in the kms_providers variable from the previous step
    key_vault_namespace,
    client,
    CodecOptions(uuid_representation=STANDARD),
    kms_tls_options=tls_options,
)
data_key_id = client_encryption.create_data_key(provider, master_key)
base_64_data_key_id = base64.b64encode(data_key_id)
print("DataKeyId [base64]: ", base_64_data_key_id)

Tip

See: Complete Code

To view the complete code for making a Data Encryption Key, see our Github repository.

Configure the MongoClient

Specify the Key Vault Collection Namespace

Specify encryption.__keyVault as the Key Vault collection namespace.

InsertEncryptedDocument.cs

var keyVaultNamespace = CollectionNamespace.FromFullName("encryption.__keyVault");

insert-encrypted-document.go

keyVaultNamespace := "encryption.__keyVault"

InsertEncryptedDocument.java

String keyVaultNamespace = "encryption.__keyVault";

insert_encrypted_document.js

const keyVaultNamespace = "encryption.__keyVault";

insert_encrypted_document.py

key_vault_namespace = "encryption.__keyVault"

Specify your KMIP Endpoint

Specify kmip in your kmsProviders object and enter the URI endpoint of your KMIP-compliant key provider:

InsertEncryptedDocument.cs

var kmsProviders = new Dictionary<string, IReadOnlyDictionary<string, object>>();
var provider = "kmip";
var kmipKmsOptions = new Dictionary<string, object>
{
   { "endpoint", "<endpoint for your KMIP-compliant key provider>" },
};
kmsProviders.Add(provider, kmipKmsOptions);

insert-encrypted-document.go

provider := "kmip"
kmsProviders := map[string]map[string]interface{}{
	provider: {
		"endpoint": "<endpoint for your KMIP-compliant key provider>",
	},
}

InsertEncryptedDocument.java

String kmsProvider = "kmip";
Map<String, Map<String, Object>> kmsProviders = new HashMap<String, Map<String, Object>>();
Map<String, Object> providerDetails = new HashMap<>();
providerDetails.put("endpoint", "<endpoint for your KMIP-compliant key provider>");
kmsProviders.put(kmsProvider, providerDetails);

insert_encrypted_document.js

const provider = "kmip";
const kmsProviders = {
  kmip: {
    endpoint: "<endpoint for your KMIP-compliant key provider>",
  },
};

insert_encrypted_document.py

provider = "kmip"
kms_providers = {
    provider: {"endpoint": "<endpoint for your KMIP-compliant key provider>"}
}

Create an Encryption Schema For Your Collection

Create an encryption schema that specifies how your client application encrypts your documents' fields:

Tip

Add Your Data Encryption Key Base64 ID

Make sure to update the following code to include your Base64 DEK ID. You received this value in the Generate your Data Encryption Key step of this guide.

InsertEncryptedDocument.cs

var keyId = "<Your base64 DEK ID here>";
var schema = new BsonDocument
{
   { "bsonType", "object" },
   {
       "encryptMetadata",
       new BsonDocument("keyId", new BsonArray(new[] { new BsonBinaryData(Convert.FromBase64String(keyId), BsonBinarySubType.UuidStandard) }))
   },
   {
       "properties",
       new BsonDocument
       {
           {
               "ssn", new BsonDocument
               {
                   {
                       "encrypt", new BsonDocument
                       {
                           { "bsonType", "int" },
                           { "algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic" }
                       }
                   }
               }
           },
           {
               "bloodType", new BsonDocument
               {
                   {
                       "encrypt", new BsonDocument
                       {
                           { "bsonType", "string" },
                           { "algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Random" }
                       }
                   }
               }
           },
           {
               "medicalRecords", new BsonDocument
               {
                   {
                       "encrypt", new BsonDocument
                       {
                           { "bsonType", "array" },
                           { "algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Random" }
                       }
                   }
               }
           },
           {
               "insurance", new BsonDocument
               {
                   { "bsonType", "object" },
                   {
                       "properties", new BsonDocument
                       {
                           {
                               "policyNumber", new BsonDocument
                               {
                                   {
                                       "encrypt", new BsonDocument
                                       {
                                           { "bsonType", "int" },
                                           { "algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic" }
                                       }
                                   }
                               }
                           }
                       }
                   }
               }
           }
       }
   }
};
var schemaMap = new Dictionary<string, BsonDocument>();
schemaMap.Add(dbNamespace, schema);

insert-encrypted-document.go

dek_id := "<Your Base64 DEK ID>"
schema_template := `{
	"bsonType": "object",
	"encryptMetadata": {
		"keyId": [
			{
				"$binary": {
					"base64": "%s",
					"subType": "04"
				}
			}
		]
	},
	"properties": {
		"insurance": {
			"bsonType": "object",
			"properties": {
				"policyNumber": {
					"encrypt": {
						"bsonType": "int",
						"algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic"
					}
				}
			}
		},
		"medicalRecords": {
			"encrypt": {
				"bsonType": "array",
				"algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Random"
			}
		},
		"bloodType": {
			"encrypt": {
				"bsonType": "string",
				"algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Random"
			}
		},
		"ssn": {
			"encrypt": {
				"bsonType": "int",
				"algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic"
			}
		}
	}
}`
schema := fmt.Sprintf(schema_template, dek_id)
var schemaDoc bson.Raw
if err := bson.UnmarshalExtJSON([]byte(schema), true, &schemaDoc); err != nil {
	return fmt.Errorf("UnmarshalExtJSON error: %v", err)
}
schemaMap := map[string]interface{}{
	dbName + "." + collName: schemaDoc,
}

InsertEncryptedDocument.java

String dekId = "<paste-base-64-encoded-data-encryption-key-id>>";
Document jsonSchema = new Document().append("bsonType", "object").append("encryptMetadata",
        new Document().append("keyId", new ArrayList<>((Arrays.asList(new Document().append("$binary", new Document()
                .append("base64", dekId)
                .append("subType", "04")))))))
        .append("properties", new Document()
                .append("ssn", new Document().append("encrypt", new Document()
                        .append("bsonType", "int")
                        .append("algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic")))
                .append("bloodType", new Document().append("encrypt", new Document()
                        .append("bsonType", "string")
                        .append("algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Random")))
                .append("medicalRecords", new Document().append("encrypt", new Document()
                        .append("bsonType", "array")
                        .append("algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Random")))
                .append("insurance", new Document()
                        .append("bsonType", "object")
                        .append("properties",
                                new Document().append("policyNumber", new Document().append("encrypt", new Document()
                                        .append("bsonType", "int")
                                        .append("algorithm", "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic"))))));
HashMap<String, BsonDocument> schemaMap = new HashMap<String, BsonDocument>();
schemaMap.put("medicalRecords.patients", BsonDocument.parse(jsonSchema.toJson()));

insert_encrypted_document.js

dataKey = "<Your base64 DEK ID>";
const schema = {
  bsonType: "object",
  encryptMetadata: {
    keyId: [new Binary(Buffer.from(dataKey, "base64"), 4)],
  },
  properties: {
    insurance: {
      bsonType: "object",
      properties: {
        policyNumber: {
          encrypt: {
            bsonType: "int",
            algorithm: "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic",
          },
        },
      },
    },
    medicalRecords: {
      encrypt: {
        bsonType: "array",
        algorithm: "AEAD_AES_256_CBC_HMAC_SHA_512-Random",
      },
    },
    bloodType: {
      encrypt: {
        bsonType: "string",
        algorithm: "AEAD_AES_256_CBC_HMAC_SHA_512-Random",
      },
    },
    ssn: {
      encrypt: {
        bsonType: "int",
        algorithm: "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic",
      },
    },
  },
};
var patientSchema = {};
patientSchema[namespace] = schema;

insert_encrypted_document.py

dek_id = b"<paste-base-64-encoded-data-encryption-key-id>"
json_schema = {
    "bsonType": "object",
    "encryptMetadata": {"keyId": [Binary(base64.b64decode(dek_id), UUID_SUBTYPE)]},
    "properties": {
        "insurance": {
            "bsonType": "object",
            "properties": {
                "policyNumber": {
                    "encrypt": {
                        "bsonType": "int",
                        "algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic",
                    }
                }
            },
        },
        "medicalRecords": {
            "encrypt": {
                "bsonType": "array",
                "algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Random",
            }
        },
        "bloodType": {
            "encrypt": {
                "bsonType": "string",
                "algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Random",
            }
        },
        "ssn": {
            "encrypt": {
                "bsonType": "int",
                "algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic",
            }
        },
    },
}
patient_schema = {"medicalRecords.patients": json_schema}
patient_schema = {"medicalRecords.patients": json_schema}

Tip

Note

Automatic Encryption Options

The automatic encryption options provide configuration information to the Automatic Encryption Shared Library, which modifies the application's behavior when accessing encrypted fields.

To learn more about the Automatic Encryption Shared Library, see the Automatic Encryption Shared Library for CSFLE page.

Create the MongoClient

Instantiate a MongoDB client object with the following automatic encryption settings:

InsertEncryptedDocument.cs

var clientSettings = MongoClientSettings.FromConnectionString(connectionString);
var autoEncryptionOptions = new AutoEncryptionOptions(
    keyVaultNamespace: keyVaultNamespace,
    kmsProviders: kmsProviders,
    schemaMap: schemaMap,
    extraOptions: extraOptions,
    tlsOptions: tlsOptions
    );
clientSettings.AutoEncryptionOptions = autoEncryptionOptions;
var secureClient = new MongoClient(clientSettings);

insert-encrypted-document.go

autoEncryptionOpts := options.AutoEncryption().
	SetKmsProviders(kmsProviders).
	SetKeyVaultNamespace(keyVaultNamespace).
	SetSchemaMap(schemaMap).
	SetExtraOptions(extraOptions).SetTLSConfig(tlsConfig)
secureClient, err := mongo.Connect(context.TODO(), options.Client().ApplyURI(uri).SetAutoEncryptionOptions(autoEncryptionOpts))
if err != nil {
	return fmt.Errorf("Connect error for encrypted client: %v", err)
}
defer func() {
	_ = secureClient.Disconnect(context.TODO())
}()

InsertEncryptedDocument.java

MongoClientSettings clientSettings = MongoClientSettings.builder()
    .applyConnectionString(new ConnectionString(connectionString))
    .autoEncryptionSettings(AutoEncryptionSettings.builder()
        .keyVaultNamespace(keyVaultNamespace)
        .kmsProviders(kmsProviders)
        .schemaMap(schemaMap)
        .extraOptions(extraOptions)
        .build())
    .build();
MongoClient mongoClientSecure = MongoClients.create(clientSettings);

insert_encrypted_document.js

const secureClient = new MongoClient(connectionString, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
  autoEncryption: {
    keyVaultNamespace,
    kmsProviders,
    schemaMap: patientSchema,
    extraOptions: extraOptions,
    tlsOptions,
  },
});

insert_encrypted_document.py

fle_opts = AutoEncryptionOpts(
    kms_providers,
    key_vault_namespace,
    schema_map=patient_schema,
    kms_tls_options=tls_options,
    **extra_options
)
secureClient = MongoClient(connection_string, auto_encryption_opts=fle_opts)

Insert a Document with Encrypted Fields

Use your CSFLE-enabled MongoClient instance to insert an encrypted document into the medicalRecords.patients namespace using the following code snippet:

InsertEncryptedDocument.cs

var sampleDocFields = new BsonDocument
{
    { "name", "Jon Doe" },
    { "ssn", 145014000 },
    { "bloodType", "AB-" },
    {
        "medicalRecords", new BsonArray
        {
            new BsonDocument("weight", 180),
            new BsonDocument("bloodPressure", "120/80")
        }
    },
    {
        "insurance", new BsonDocument
        {
            { "policyNumber", 123142 },
            { "provider", "MaestCare" }
        }
    }
};
// Construct an auto-encrypting client
var secureCollection = secureClient.GetDatabase(db).GetCollection<BsonDocument>(coll);
// Insert a document into the collection
secureCollection.InsertOne(sampleDocFields);

insert-encrypted-document.go

test_patient := map[string]interface{}{
	"name":      "Jon Doe",
	"ssn":       241014209,
	"bloodType": "AB+",
	"medicalRecords": []map[string]interface{}{{
		"weight":        180,
		"bloodPressure": "120/80",
	}},
	"insurance": map[string]interface{}{
		"provider":     "MaestCare",
		"policyNumber": 123142,
	},
}
if _, err := secureClient.Database(dbName).Collection(collName).InsertOne(context.TODO(), test_patient); err != nil {
	return fmt.Errorf("InsertOne error: %v", err)
}

Note

Rather than creating a raw BSON document, you can pass a struct with bson tags directly to the driver for encoding.

InsertEncryptedDocument.java

ArrayList<Document> medicalRecords = new ArrayList<>();
medicalRecords.add(new Document().append("weight", "180"));
medicalRecords.add(new Document().append("bloodPressure", "120/80"));
Document insurance = new Document()
.append("policyNumber", 123142)
.append("provider",  "MaestCare");
Document patient = new Document()
    .append("name", "Jon Doe")
    .append("ssn", 241014209)
    .append("bloodType", "AB+")
    .append("medicalRecords", medicalRecords)
    .append("insurance", insurance);
mongoClientSecure.getDatabase(recordsDb).getCollection(recordsColl).insertOne(patient);

insert_encrypted_document.js

try {
  const writeResult = await secureClient
    .db(db)
    .collection(coll)
    .insertOne({
      name: "Jon Doe",
      ssn: 241014209,
      bloodType: "AB+",
      medicalRecords: [{ weight: 180, bloodPressure: "120/80" }],
      insurance: {
        policyNumber: 123142,
        provider: "MaestCare",
      },
    });
} catch (writeError) {
  console.error("writeError occurred:", writeError);
}

insert_encrypted_document.py

def insert_patient(
    collection, name, ssn, blood_type, medical_records, policy_number, provider
):
    insurance = {"policyNumber": policy_number, "provider": provider}
    doc = {
        "name": name,
        "ssn": ssn,
        "bloodType": blood_type,
        "medicalRecords": medical_records,
        "insurance": insurance,
    }
    collection.insert_one(doc)
medical_record = [{"weight": 180, "bloodPressure": "120/80"}]
insert_patient(
    secureClient.medicalRecords.patients,
    "Jon Doe",
    241014209,
    "AB+",
    medical_record,
    123142,
    "MaestCare",
)

When you insert a document, your CSFLE-enabled client encrypts the fields of your document such that it resembles the following:

{
  "_id": { "$oid": "<_id of your document>" },
  "name": "Jon Doe",
  "ssn": {
    "$binary": "<cipher-text>",
    "$type": "6"
  },
  "bloodType": {
    "$binary": "<cipher-text>",
    "$type": "6"
  },
  "medicalRecords": {
    "$binary": "<cipher-text>",
    "$type": "6"
  },
  "insurance": {
    "provider": "MaestCare",
    "policyNumber": {
      "$binary": "<cipher-text>",
      "$type": "6"
    }
  }
}

Tip

See: Complete Code

To view the complete code for inserting an encrypted document, see our Github repository

To view the complete code for inserting an encrypted document, see our Github repository.

Retrieve Your Encrypted Document

Retrieve the encrypted document you inserted in the Insert a Document with Encrypted Fields step of this guide.

To show the functionality of CSFLE, the following code snippet queries for your document with a client configured for automatic CSFLE as well as a client that is not configured for automatic CSFLE.

InsertEncryptedDocument.cs

Console.WriteLine("Finding a document with regular (non-encrypted) client.");
var filter = Builders<BsonDocument>.Filter.Eq("name", "Jon Doe");
var regularResult = regularCollection.Find(filter).Limit(1).ToList()[0];
Console.WriteLine($"\n{regularResult}\n");
Console.WriteLine("Finding a document with encrypted client, searching on an encrypted field");
var ssnFilter = Builders<BsonDocument>.Filter.Eq("ssn", 145014000);
var secureResult = secureCollection.Find(ssnFilter).Limit(1).First();
Console.WriteLine($"\n{secureResult}\n");

insert-encrypted-document.go

fmt.Println("Finding a document with regular (non-encrypted) client.")
var resultRegular bson.M
err = regularClient.Database(dbName).Collection(collName).FindOne(context.TODO(), bson.D{{"name", "Jon Doe"}}).Decode(&resultRegular)
if err != nil {
	panic(err)
}
outputRegular, err := json.MarshalIndent(resultRegular, "", "    ")
if err != nil {
	panic(err)
}
fmt.Printf("%s\n", outputRegular)
fmt.Println("Finding a document with encrypted client, searching on an encrypted field")
var resultSecure bson.M
err = secureClient.Database(dbName).Collection(collName).FindOne(context.TODO(), bson.D{{"ssn", "241014209"}}).Decode(&resultSecure)
if err != nil {
	panic(err)
}
outputSecure, err := json.MarshalIndent(resultSecure, "", "    ")
if err != nil {
	panic(err)
}
fmt.Printf("%s\n", outputSecure)

InsertEncryptedDocument.java

System.out.println("Finding a document with regular (non-encrypted) client.");
Document docRegular = mongoClientRegular.getDatabase(recordsDb).getCollection(recordsColl).find(eq("name", "Jon Doe")).first();
System.out.println(docRegular.toJson());
System.out.println("Finding a document with encrypted client, searching on an encrypted field");
Document docSecure = mongoClientSecure.getDatabase(recordsDb).getCollection(recordsColl).find(eq("ssn", 241014209)).first();
System.out.println(docSecure.toJson());

insert_encrypted_document.js

console.log("Finding a document with regular (non-encrypted) client.");
console.log(
  await regularClient.db(db).collection(coll).findOne({ name: /Jon/ })
);
console.log(
  "Finding a document with encrypted client, searching on an encrypted field"
);
console.log(
  await secureClient.db(db).collection(coll).findOne({ ssn: "241014209" })
);

insert_encrypted_document.py

print("Finding a document with regular (non-encrypted) client.")
result = regularClient.medicalRecords.patients.find_one({"name": "Jon Doe"})
pprint.pprint(result)
print("Finding a document with encrypted client, searching on an encrypted field")
pprint.pprint(secureClient.medicalRecords.patients.find_one({"ssn": 241014209}))

The output of the preceding code snippet should look like this:

Finding a document with regular (non-encrypted) client.
{
  _id: new ObjectId("629a452e0861b3130887103a"),
  name: 'Jon Doe',
  ssn: new Binary(Buffer.from("0217482732d8014cdd9ffdd6e2966e5e7910c20697e5f4fa95710aafc9153f0a3dc769c8a132a604b468732ff1f4d8349ded3244b59cbfb41444a210f28b21ea1b6c737508d9d30e8baa30c1d8070c4d5e26", "hex"), 6),
  bloodType: new Binary(Buffer.from("0217482732d8014cdd9ffdd6e2966e5e79022e238536dfd8caadb4d7751ac940e0f195addd7e5c67b61022d02faa90283ab69e02303c7e4001d1996128428bf037dea8bbf59fbb20c583cbcff2bf3e2519b4", "hex"), 6),
  'key-id': 'demo-data-key',
  medicalRecords: new Binary(Buffer.from("0217482732d8014cdd9ffdd6e2966e5e790405163a3207cff175455106f57eef14e5610c49a99bcbd14a7db9c5284e45e3ee30c149354015f941440bf54725d6492fb3b8704bc7c411cff6c868e4e13c58233c3d5ed9593eca4e4d027d76d3705b6d1f3b3c9e2ceee195fd944b553eb27eee69e5e67c338f146f8445995664980bf0", "hex"), 6),
  insurance: {
    policyNumber: new Binary(Buffer.from("0217482732d8014cdd9ffdd6e2966e5e79108decd85c05be3fec099e015f9d26d9234605dc959cc1a19b63072f7ffda99db38c7b487de0572a03b2139ac3ee163bcc40c8508f366ce92a5dd36e38b3c742f7", "hex"), 6),
    provider: 'MaestCare'
  }
}
Finding a document with encrypted client, searching on an encrypted field
{
  _id: new ObjectId("629a452e0861b3130887103a"),
  name: 'Jon Doe',
  ssn: 241014209,
  bloodType: 'AB+',
  'key-id': 'demo-data-key',
  medicalRecords: [ { weight: 180, bloodPressure: '120/80' } ],
  insurance: { policyNumber: 123142, provider: 'MaestCare' }
}

Tip

See: Complete Code

To view the complete code for inserting an encrypted document, see our Github repository

To view the complete code for inserting an encrypted document, see our Github repository.

Learn More

To learn how CSFLE works, see Fundamentals.

To learn more about the topics mentioned in this guide, see the following links:

Learn more about CSFLE components on the Reference page.
Learn how Customer Master Keys and Data Encryption Keys work on the Keys and Key Vaults page.
See how KMS Providers manage your CSFLE keys on the CSFLE KMS Providers page.

Back

Use GCP

Reference

Overview

Before You Get Started

Tip

See: Full Application

Set Up the KMS

Note

Configure your KMIP-compliant key provider

Specify your Certificates

Important

Important

Note

Configure Client With SSLContext

Create the Application

Create a Unique Index on Your Key Vault Collection

Create a Data Encryption Key

Add your Endpoint

Add Your Key Information

Generate your Data Encryption Key

Tip

See: Complete Code

Configure the MongoClient

Specify the Key Vault Collection Namespace

Specify your KMIP Endpoint

Create an Encryption Schema For Your Collection

Tip

Add Your Data Encryption Key Base64 ID

Tip

Further Reading on Schemas

Specify the Location of the Automatic Encryption Shared Library

Note

Automatic Encryption Options

Create the MongoClient

Insert a Document with Encrypted Fields

Note

Tip

See: Complete Code

Retrieve Your Encrypted Document

Tip

See: Complete Code

Learn More