KeyVault.deleteKey()¶

On this page

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 mongo 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:

Use the Mongo() constructor from the mongo shell to establish a connection with the required client-side field level encryption options. The Mongo() method supports both Amazon Web Services and Local Key Management Service (KMS) providers for Customer Master Key (CMK) management.

or
Use the mongo shell command line options to establish a connection with the required options. The command line options only support the AWS KMS provider for CMK management.

Example¶

The following example is intended for rapid evaluation of client-side field level encryption. For more complete examples appropriate for development and production environments, see Remove a data encryption key.

Configuring client-side field level encryption for a locally managed key requires specifying a base64-encoded 96-byte string with no line breaks. The following operation generates a key that meets the stated requirements and loads it into the mongo shell:

copy

TEST_LOCAL_KEY=$(echo "$(head -c 96 /dev/urandom | base64 | tr -d '\n')")

mongo --nodb --shell --eval "var TEST_LOCAL_KEY='$TEST_LOCAL_KEY'"

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

copy

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

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

copy

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

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

copy

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

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

copy

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