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 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 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')")

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:

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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.

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

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 following data encryption key:

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{
  "_id" : UUID("b4b41b33-5c97-412e-a02b-743498346079"),
  "keyMaterial" : BinData(0,"PXRsLOAYxhzTS/mFQAI8486da7BwZgqA91UI7NKz/T/AjB0uJZxTvhvmQQsKbCJYsWVS/cp5Rqy/FUX2zZwxJOJmI3rosPhzV0OI5y1cuXhAlLWlj03CnTcOSRzE/YIrsCjMB0/NyiZ7MRWUYzLAEQnE30d947XCiiHIb8a0kt2SD0so8vZvSuP2n0Vtz4NYqnzF0CkhZSWFa2e2yA=="),
  "creationDate" : ISODate("2019-08-12T21:21:30.569Z"),
  "updateDate" : ISODate("2019-08-12T21:21:30.569Z"),
  "status" : 0,
  "version" : NumberLong(0),
  "masterKey" : {
    "provider" : "aws",
    "key" : "arn:aws:kms:region:account:key/keystring",
    "region" : "region",
    "endpoint" : "kms.region.amazonaws.com:443"
  },
  "keyAltNames" : [
    "dataKeyAlternativeName"
  ]
}

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