KeyVault.getKey()¶

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Behavior
Example

New in version 4.2.

KeyVault.getKey(UUID)¶

Gets a data encryption key with the specified UUID. The data encryption key must exist in the key vault associated to the database connection.

getKey() has the following syntax:

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keyVault = db.getMongo().getKeyVault()

keyVault.getKey(UUID("<UUID String>"))

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

Returns:	Document representing a matching data encryption key. Returns nothing if no key in the key vault has the specified `UUID`.

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 the following 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 Amazon Web Services KMS provider for CMK management.

Example¶

The following example uses a locally managed KMS for the client-side field level encryption configuration.

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:

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

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

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

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var autoEncryptionOpts = {
  "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.

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

Retrieve the keyVault object and use the KeyVault.getKey() to retrieve a data encryption key using its UUID:

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

getKey() returns the data encryption key, with output similar to the following:

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{
  "_id" : UUID("b4b41b33-5c97-412e-a02b-743498346079"),
  "keyMaterial" : BinData(0,"E+0jZKzA4YuE1lGmSVIy2mivqH4JxFo0yFATdxYX/s0YtMFsgVXyu7Bbn4IQ2gn7F/9JAPJFOxdQc5lN3AR+oX33ewVZsd63f3DN1zzcukqdR2Y+EeO7ekRxyRjdzMaNNrBNIv9Gn5LEJgWPSYkG8VczF7cNZnc1YmnR0tuDPNYfm0J7dCZuZUNWW3FCGRcdFx6AlXiCtXKNR97hJ216pQ=="),
  "creationDate" : ISODate("2021-03-16T18:22:43.733Z"),
  "updateDate" : ISODate("2021-03-16T18:22:43.733Z"),
  "status" : 0, "version" : NumberLong(0),
  "masterKey" : {
    "provider" : "local"
  },
  "keyAltNames" : [
     "alpha"
  ]
}

← KeyVault.deleteKey() KeyVault.getKeys() →