 
npm install @azure/msal-node-extensions| Getting Started | AAD Docs | Library Reference | Samples
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1. About
- Cache Persistence
- Brokering
1. FAQ
1. Changelog
1. Prerequisites
1. Installation
1. Usage - Cache Persistence
1. Usage - Brokering
1. Build and Test
- Build package
- Test package
1. Samples
1. Security Reporting
1. License
1. Contributing
1. Code of Conduct
msal-node-extensions library offers optional features to enhance the capabilities of msal-node:- Secure mechanisms for client applications to perform cross-platform token cache serialization and persistence
- An interface for acquiring tokens from the native token broker, enabling a higher level of security and SSO with other native applications
MSAL Node supports an in-memory cache by default and provides the ICachePlugin interface to perform cache serialization, but does not provide a default way of storing the token cache to disk. Microsoft authentication extensions for node is default implementation for persisting cache to disk across different platforms.
Supported platforms are Windows, Mac and Linux:
- Windows - DPAPI is used for encryption.
- MAC - The MAC KeyChain is used.
- Linux - LibSecret is used for storing to "Secret Service".
> Note: It is recommended to use this library for cache persistence support for Public client applications such as Desktop apps only. In web applications, this may lead to scale and performance issues. Web applications are recommended to persist the cache in session.
When using the native broker, refresh tokens are bound to the device on which they are acquired on and are not accessible by msal-node or the application. This provides a higher level of security that cannot be achieved by msal-node alone. More information about token brokering can be found here
The msal-node-extensions library ships with pre-compiled binaries.
> Note: If you are planning to do local development on msal-node-extensions itself you may need to install some additional tools. node-gyp is used to compile addons for accessing system APIs. Installation requirements are listed on the node-gyp README
On linux, the library uses libsecret so you may need to install it. Depending on your distribution, you will need to run the following command:
- Debian/Ubuntu: sudo apt-get install libsecret-1-dev
- Red Hat-based: sudo yum install libsecret-devel
- Arch Linux: sudo pacman -S libsecret
The msal-node-extensions package is available on NPM.
``bash`
npm i @azure/msal-node-extensions --saveUsage - Cache Persistence
`js
const {
DataProtectionScope,
Environment,
PersistenceCreator,
PersistenceCachePlugin,
} = require("@azure/msal-node-extensions");
// You can use the helper functions provided through the Environment class to construct your cache path
// The helper functions provide consistent implementations across Windows, Mac and Linux.
const cachePath = path.join(Environment.getUserRootDirectory(), "./cache.json");
const persistenceConfiguration = {
cachePath,
dataProtectionScope: DataProtectionScope.CurrentUser,
serviceName: "
accountName: "
usePlaintextFileOnLinux: false,
}
// The PersistenceCreator obfuscates a lot of the complexity by doing the following actions for you :-
// 1. Detects the environment the application is running on and initializes the right persistence instance for the environment.
// 2. Performs persistence validation for you.
// 3. Performs any fallbacks if necessary.
PersistenceCreator
.createPersistence(persistenceConfiguration)
.then(async (persistence) => {
const publicClientConfig = {
auth: {
clientId: "
authority: "
},
// This hooks up the cross-platform cache into MSAL
cache: {
cachePlugin: new PersistenceCachePlugin(persistence)
}
};
const pca = new msal.PublicClientApplication(publicClientConfig);
// Use the public client application as required...
});
`
All the arguments for the persistence configuration are explained below:
| Field Name | Description | Required For |
| ---------- | ----------- | ------------ |
| cachePath | This is the path to the lock file the library uses to synchronize the reads and the writes | Windows, Mac and Linux |
| dataProtectionScope | Specifies the scope of the data protection on Windows either the current user or the local machine. | Windows |
| serviceName | This specifies the service name to be used on Mac and/or Linux | Mac and Linux |
| accountName | This specifies the account name to be used on Mac and/or Linux | Mac and Linux |
| usePlaintextFileOnLinux | This is a flag to default to plain text on linux if libsecret fails. Defaults to false | Linux |
Enabling token brokering requires just one new configuration parameter:
`javascript
import { PublicClientApplication, Configuration } from "@azure/msal-node";
import { NativeBrokerPlugin } from "@azure/msal-node-extensions";
const msalConfig: Configuration = {
auth: {
clientId: "your-client-id"
},
broker: {
nativeBrokerPlugin: new NativeBrokerPlugin()
}
};
const pca = new PublicClientApplication(msalConfig);
`
More detailed information can be found in the brokering documentation
If you intend to contribute to the library visit the contributing section for even more information on how.
To build both the @azure/msal-node-extensions library and @azure/msal-common libraries, run the following commands:
`bash`
// Install dev dependencies from root of repo
npm install
// Change to the msal-node-extensions package directory
cd lib/msal-node-extensions/
// Build msal-common and msal-node-extensions
npm run build:all
@azure/msal-node-extensions uses jest to run unit tests and coverage.
`bash``
// To run tests
npm test
- Auth Code CLI sample with Cache Persistence. This can be run on Windows, Mac and Linux.
- Electron sample with Cache Persistence
- Brokering sample
If you find a security issue with our libraries or services please report it to secure@microsoft.com with as much detail as possible. Your submission may be eligible for a bounty through the Microsoft Bounty program. Please do not post security issues to GitHub Issues or any other public site. We will contact you shortly upon receiving the information. We encourage you to get notifications of when security incidents occur by visiting this page and subscribing to Security Advisory Alerts.
Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT License.
This project welcomes contributions and suggestions. Most contributions require you to agree to a
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This project has adopted the Microsoft Open Source Code of Conduct.
For more information see the Code of Conduct FAQ or
contact opencode@microsoft.com with any additional questions or comments.
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.