Authenticate

Enhancements to the smart card reader authentication

Starting with the version 2409, Citrix Workspace app supports the plug and play functionality for the smart card readers. With this feature, users can conveniently use their smart cards without needing to manually connect the reader before launching an ICA session. The system automatically detects and initializes the reader once the smart card is inserted.

Also, Citrix Workspace app handles concurrent smart card command requests more efficiently. When multiple processes on the Virtual Delivery Agent (VDA) read the smart card simultaneously, the redirection speed is improved.

These enhancements ensure a smoother user experience while using the smart card reader for authentication.

Support for fast smart card

Starting with the version 2409, Citrix Workspace app supports the Fast smart card feature. Fast Smart card is an improvement over the existing HDX PC/SC-based smart card redirection. It improves performance significantly when smart cards are used in high-latency WAN environments.

Enabling the fast smart card logon on Citrix Workspace app

To enable this feature, you need to specify the location of the PKCS#11 library file on the Smart card settings in Citrix Workspace app preferences. For more information, see Specifying a PKCS#11 module for smart card authentication.

Disabling the fast smart card logon on Citrix Workspace app

To disable fast smart card logon on Citrix Workspace app, set the “PKCS#11 module” in Citrix Workspace app Preferences to “None Selected”.

Note:

• Fast smart card logon is enabled by default on the VDA and disabled by default on Citrix Workspace app.
• Earlier versions of Citrix Workspace app for Mac employed the PKCS#11 module to establish SSL connections, rather than relying on smart card redirection and authentication. Presently, fast smart cards on Citrix Workspace app for Mac exclusively support cards that use the RSA algorithm. Attempting to configure an incompatible PKCS#11 module can lead to authentication failure.

Smart card

Citrix Workspace app for Mac supports smart card authentication in the following configurations:

• Smart card authentication to Workspace for Web or StoreFront 3.12 and later.

• Citrix Virtual Apps and Desktops 7 2203 and later.

• XenApp and XenDesktop 7.15 and later.

• Smart card-enabled applications, such as Microsoft Outlook and Microsoft Office that allow users to digitally sign or encrypt documents available in virtual desktop or application sessions.

• Citrix Workspace app for Mac supports using multiple certificates with a single smart card or with multiple smart cards. When your user inserts a smart card into a card reader, the certificates are available to all applications running on the device, including Citrix Workspace app for Mac.

• For double-hop sessions, a further connection is established between Citrix Workspace app for Mac and your user’s virtual desktop.

About smart card authentication to Citrix Gateway

There are multiple usable certificates when you use a smart card to authenticate a connection. Citrix Workspace app for Mac prompts you to select a certificate. After you select a certificate, Citrix Workspace app for Mac prompts you to enter the smart card password. Once authenticated, the session launches.

If there’s only one suitable certificate on the smart card, Citrix Workspace app for Mac uses that certificate and does not prompt you to select it. However, you must still enter the password associated with the smart card to authenticate the connection and to start the session.

Specifying a PKCS#11 module for smart card authentication

Note:

Installing the PKCS#11 module isn’t mandatory. This section only applies to ICA sessions. It does not apply to Citrix Workspace access to Citrix Gateway or StoreFront where a smart card is required.

To specify the PKCS#11 module for smart card authentication:

1. In Citrix Workspace app for Mac, select Preferences.
2. Click Security & Privacy.
3. In the Security & Privacy section, click Smart Card.
4. In the PKCS#11 field, select the appropriate module. Click Other to browse to the location of the PKCS#11 module if the module you wanted isn’t listed.
5. After selecting the appropriate module, click Add.

Supported readers, middleware, and smart card profiles

Citrix Workspace app for Mac supports most macOS-compatible smart card readers and cryptographic middleware. Citrix has validated the operation with the following.

Supported readers:

• Common USB connect smart card readers

Supported middleware:

• Clarify
• ActivIdentity client version
• Charismathics client version

Supported smart cards:

• PIV cards
• Common Access Card (CAC)
• Gemalto .NET cards

Follow the instructions provided by your vendor’s macOS-compatible smart card reader and cryptographic middleware for configuring user devices.

Restrictions

• Certificates must be stored on a smart card, not on the user device.
• Citrix Workspace app for Mac does not save the user certificate choice.
• Citrix Workspace app for Mac does not store or save the user’s smart card PIN. OS handles the PIN acquisitions, which might have its own caching mechanism.
• Citrix Workspace app for Mac does not reconnect sessions when a smart card is inserted.
• To use VPN tunnels with smart card authentication, you must install the Citrix Gateway Plug-in and log on through a webpage. Use your smart cards and PINs to authenticate at each step. Pass-through authentication to StoreFront with the Citrix Gateway Plug-in isn’t available for smart card users.

Conditional Access with Azure Active Directory

This authentication method is currently not supported on Citrix Workspace app for Mac.

User-Agent

Citrix Workspace app sends a user agent in network requests that can be used to configure authentication policies including redirection of authentication to other Identity Providers (IdPs).

Note:

Don’t mention the version numbers while configuring the policies.

FIDO2 for password-less authentication

Citrix Workspace app for Mac supports password-less authentication using FIDO2 security keys when connecting to a cloud store or within an HDX session. FIDO2 security keys provide a seamless way for enterprise employees to authenticate to apps or desktops that support FIDO2 without entering a user name or password. This feature currently supports roaming authenticators (USB only) with PIN code and touchID. This feature is supported on macOS 12 and later versions.

For more information about FIDO2 see FIDO2 Authentication.

For information about the prerequisites and using this feature, see Local authorization and virtual authentication using FIDO2.

FIDO2-based authentication when connecting to cloud and on-premises store

Citrix Workspace app uses the user’s default browser for FIDO2 authentication (Web Authentication), when connecting to the cloud and on-premises stores. Administrators can configure the type of browser to authenticate to Citrix Workspace app. For more information on the web browser settings, see Global App Configuration service documentation.

The following settings allow you to select the type of browser that is used for authenticating an end user into Citrix Workspace app:

To push the configured settings, run the following commands using the Mobile Device Management (MDM), Global App Configuration service (GACS), or the command line interface methods:

• Enable FIDO2 using MDM: To enable authentication through MDM, administrators must use the following setting:

  <key>WebBrowserForAuthentication</key><string>System</string>

For more information on how to use MDM, see Mobile Device Management.

• Enable FIDO2 using GACS: To enable authentication through GACS, administrators must use the following setting:

{
    "serviceURL": {
      "url": "https://serviceURL:443"
    },
    "settings": {
      "name": "Web browser for Authenticating into Citrix Workspace",
      "description": "Allows admin to select the type of browser used for authenticating an end user into Citrix Workspace app",
      "useForAppConfig": true,
      "appSettings": {
        "macos": [
          {
            "assignedTo": [
              "AllUsersNoAuthentication"
            ],
            "category": "authentication",
            "settings": [
              {
                "name": "web browser for authentication",
                "value": "SystemWithPrivateSession"
              }
            ],
            "userOverride": false
          }
        ]
      }
    }
  }

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• Enable FIDO2 using the command-line interface: To enable authentication using the command-line interface, administrators must run the following command:

  defaults write com.citrix.receiver.nomas WebBrowserForAuthentication System

FIDO2-based authentication within an HDX session

You can configure FIDO2 Security Keys to authenticate within an HDX session. This feature currently supports roaming authenticators (USB only) with PIN code.

When you access an app or a website that supports FIDO2, a prompt appears, requesting access to the security key. If you’ve previously registered your security key with a PIN (a minimum of 4 and a maximum of 64 characters), then you must enter the PIN while signing in.

If you’ve registered your security key previously without a PIN, simply touch the security key to sign in.

This feature is enabled by default for Citrix Workspace app for 2307 and future releases. You can disable FIDO2 authentication using the Mobile Device Management (MDM) or command-line interface methods by running the following commands:

• Disable FIDO2 based authentication using MDM: To disable this feature through MDM, administrators must use the following setting:

  <key>Fido2Enabled</key><false/>

For more information on how to use MDM, see Mobile Device Management.

• Disable FIDO2 based authentication using the command-line interface: To disable this feature, run the following command in command-line interface methods:

  defaults write com.citrix.receiver.nomas Fido2Enabled -bool NO

Support for device touch ID for FIDO2 password-less authentication

Previously, Citrix Workspace app supported FIDO2 password-less authentication through the roaming authenticators (USB only) with PIN code and touch.

Starting with the version 2405, Citrix Workspace app now supports device touch ID for FIDO2 password-less authentication, enhancing the sign-in experience for users. With this feature, users can securely sign in to the store configured on the Citrix Workspace app using the device touch ID, eliminating the need for passcodes or passwords. This feature enhances both the usability and security of Citrix Workspace app for macOS users. This feature is enabled by default.

Support for Certificate-based authentication

Starting with the 2305 version, Workspace administrators can configure and enforce Azure Active Directory conditional access policies for users authenticating to Citrix Workspace app.

The following methods can be used to enable the authentication using conditional access:

• Mobile Device Management (MDM)
• Global App Configuration service (GACS)

The flag values read by Citrix Workspace app take precedence in the following order:

• Mobile Device Management (MDM)
• Global App Configuration service (GACS)

Enabling authentication using conditional access through MDM

To enable authentication using conditional access with Azure AD through MDM, admins must use the following setting:

<key>enableAAD</key> <true/>

This setting supports Boolean values. The value is set to false by default. The default value is considered if the key value isn’t available.

For more information on how to use MDM, see Mobile Device Management.

Enabling authentication using conditional access through GACS

To enable authentication using conditional access with Azure AD through GACS, admins must use the following setting:

enable conditional AAD

For more information, see Supported settings and their values per platform for macOS in the GACS documentation.