Credentials storage

Tip

This article covers Uno-specific information for Windows.Security.Credentials.PasswordVault API. For a full description of the feature and instructions on using it, see PasswordVault Class.

The PasswordVault is a credentials manager that is persisted using a secured storage.
PasswordCredential is used to manipulate passwords in the vault.

Supported features

Feature	Windows	Android	iOS	Web (WASM) Linux (Skia)	Win 7 (Skia)	Tizen
`PasswordVault`	✔	✔	✔	✖	✖	✖	✖
`PasswordCredential`	✔	Partial	Partial	Partial	✖	✖	✖

`PasswordVault`

The PasswordVault is designed to be a safe place to store the user's credentials and tokens. It's backed by the hardware encryption mechanism of each platform, which provides a high level of security. However, the PasswordVault does not offer any memory security feature.

Below see the implementation information for each platform:

The implementation uses the AndroidKeyStore which was introduced with API 18 (4.3). The KeyStore is used to generate a symmetric key which is then used to encrypt and decrypt a file persisted in the application directory. The key is managed by the KeyStore itself, which usually uses the hardware component to persist it. The key is not even accessible to the application.

For more information, see KeyStore.

PasswordCredential

This class is implemented, however it never hides the password like the UWP does. This means that the RetrievePassword method does nothing, but we recommend to still use it in order to ensure cross-platform compatibility.

The Properties property is not implemented.

Sample

Storing a credential

var vault = new Windows.Security.Credentials.PasswordVault();
vault.Add(new Windows.Security.Credentials.PasswordCredential(
    "My App", username, password));

Retrieving a credential

var vault = new Windows.Security.Credentials.PasswordVault();
var credential = vault.Retrieve("My App", userName);
credential.RetrievePassword();
var password = credential.Password;