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Client-Side Field Level Encryption Methods

KeyVault.deleteKey()

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  • Behavior
  • Example

New in version 4.2.

KeyVault.deleteKey(UUID)

Deletes a data encryption key with the specified UUID from the key vault associated to the database connection.

deleteKey() has the following syntax:

keyVault = db.getMongo().getKeyVault()
keyVault.deleteKey(UUID("<UUID String>"))

The UUID is a BSON binary data object with subtype 4.

Returns:A document indicating the number of deleted keys.

Behavior

Requires Configuring Client-Side Field Level Encryption on Database Connection

The mongosh client-side field level encryption methods require a database connection with client-side field level encryption enabled. If the current database connection was not initiated with client-side field level encryption enabled, either:

Example

The following example is intended for rapid evaluation of client-side field level encryption. For specific examples of using KeyVault.deleteKey() with each supported KMS provider, see Delete a Data Encryption Key.

1

Start mongosh

Start the mongosh client.

mongosh --nodb
2

Generate Your Key

To configure client-side field level encryption for a locally managed key, generate a base64-encoded 96-byte string with no line breaks.

const TEST_LOCAL_KEY = require("crypto").randomBytes(96).toString("base64")
3

Create the Client-Side Field Level Encryption Options

Create the client-side field level encryption options using the generated local key string:

 var autoEncryptionOpts = {
   "keyVaultNamespace" : "encryption.__dataKeys",
   "kmsProviders" : {
     "local" : {
       "key" : BinData(0, TEST_LOCAL_KEY)
     }
   }
 }
4

Create Your Encrypted Client

Use the Mongo() constructor with the client-side field level encryption options configured to create a database connection. Replace the mongodb://myMongo.example.net URI with the connection string URI of the target cluster.

encryptedClient = Mongo(
  "mongodb://myMongo.example.net:27017/?replSetName=myMongo",
   autoEncryptionOpts
)

Retrieve the KeyVault object and use the KeyVault.deleteKey() method to delete the data encryption key with matching UUID:

keyVault = encryptedClient.getKeyVault()
keyVault.deleteKey(UUID("b4b41b33-5c97-412e-a02b-743498346079"))

If successful, deleteKey() returns output similar to the following:

{ "acknowledged" : true, "deletedCount" : 1 }

Tip

See also:

Delete a Data Encryption Key

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KeyVault.createKey()

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