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Duo Single Sign-On for Generic OpenID Connect (OIDC) Relying Parties

Last Updated: November 30th, 2022

Add two-factor authentication and flexible security policies to any OIDC application with Duo Single-Sign On, our cloud-hosted OpenID provider, complete with inline self-service enrollment and Duo Prompt.

This application is currently in Early Access. Please provide feedback using the OIDC and OAuth form.

About Duo Single Sign-On

Duo Single Sign-On is our cloud-hosted SSO product which layers Duo's strong authentication and flexible policy engine on top of an application's login using the Security Assertion Markup Language (SAML) 2.0 or OpenID Connect (OIDC) authentication standards. Duo Single Sign-On acts as an OpenID provider (OP), authenticating your users using existing on-premises Active Directory (AD) or any SAML 2.0 IdP and prompting for two-factor authentication before permitting access to your service provider application.

Duo Single Sign-On is available in Duo Beyond, Duo Access, and Duo MFA plans, which also include the ability to define policies that enforce unique controls for each individual SSO application. For example, you can require that users of one application complete two-factor authentication at every login, but only once every seven days when accessing a different application. Duo checks the user, device, and network against an application's policy before allowing access to the application.

Configure Single Sign-On

Before configuring your relying party (RP) application you'll first need to enable Duo Single Sign-On for your Duo account and configure a working authentication source.

Once you have your SSO authentication source working, continue to the next step of creating the RP application in Duo.

When configuring an application to be protected with Duo Single Sign-On you'll need to send attributes from Duo Single Sign-On to the application. Active Directory will work with no additional setup, but if you used a SAML idenity provider as your authentication source please verify that you configured it to send the correct SAML attributes.

Below you can see the Bridge Attribute name used that automatically maps certain attributes from your authentication source.

Bridge Attribute Active Directory SAML IdP
<Username> sAMAccountName Username
<Email Address> mail Email
<Display Name> displayName DisplayName
<First Name> givenName FirstName
<Last Name> sn LastName

Create Your Cloud Application in Duo

  1. Log on to the Duo Admin Panel and navigate to Applications.

  2. Click Protect an Application and locate the entry for Generic OIDC Relying Party with a protection type of "2FA with SSO hosted by Duo (Single Sign-On)" in the applications list. Click Protect to the far-right to start configuring Generic OIDC Relying Party. See Protecting Applications for more information about protecting applications in Duo and additional application options. You'll need the information on the Generic OIDC Relying Party page under Metadata later.

  3. The Metadata section is where you can get OpenID provider information about Duo Single Sign-On to provide to your relying provider.

Name Description
Client ID The public identifier of the relying party.
Client Secret A secret that is only held by the relying party and OpenID provider. This secret is used to make authenticated requests against the OpenID provider. You can reset the secret by clicking the Reset Client Secret button. Once the secret is reset the old secret will be rejected.
Issuer Unique entity related to the OpenID provider that issues a set of claims. This is also the base URL of every endpoint below.
Discovery URL Returns basic information about OpenID provider such as endpoint URLs and supported configuration methods. This will also include the supported scopes for this OpenID provider once this page has been configured and saved.
Authorization URL URL that the relying party will redirect the user's browser to along with an authentication request.
Token URL URL used by the relying party to retrieve the access and id tokens after a user has successfully authenticated to the OpenID provider.
JWKS URL URL that returns a list of signing keys to validate the signatures of JWTs signed by this OpenID provider.
UserInfo URL URL where relying party can present access token to retrieve information about the token.
Token Introspection URL URL where relying party can validate an access token.
Metadata for configuring generic OIDC relying parties

Configure Your Relying Party

You'll need to provide some information about Duo Single Sign-On to your cloud application provider, like URL information, client id, and client secret. You can find this information in the Metadata section at the top of the application page in the Duo Admin Panel.

Refer to your relying party's SSO configuration guide for instructions.

Update your Application in Duo

  1. Return to the application page in your Duo Admin panel.

  2. Navigate to the Relying Party section and provide information from your relying party:

    Name Description
    Grant Type Currently only the grant type of Authorization Code is supported. New grant type options when they become available will appear here.
    Sign-In Redirect URLs The URLs where Duo SSO will send the authentication response based on the redirect URL in the request. Enter the redirect URLs provided by your relying party. If the relying party has more than one redirect URL you can enter more by cicking Add Redirect URL.
    Configure grant type and redirect URLs
  3. Scopes are used by the relying party during authentication to authorize access to a user's details. Each scope returns a set of user attributes (claims) that are required to be mapped to an IdP attribute. When an OIDC request is sent to Duo SSO only the claims from the requested scopes will be sent back in the response.

    Refer to your relying party documentation to complete the OIDC Response section:

    Under the Scopes section you'll find checkboxes that show standard scopes that are commonly used in ODIC flows. Once you check a box related to a scope it will expand and show default claims that are already mapped to an authentication source using bridge attributes. On the left side under IdP Attribute you can select our pre-configured attributes which will automatically pick the correct attribute based on your authentication source from the drop-down or type in the name of an attribute from your authentication source. The right side Claim corresponds to the name of the claim that attribute will be associated with.

    Name Description
    openid A required claimless scope when doing an OIDC authentication. This scope cannot be disabled.
    profile Checking this box will automatically populate three standard claims given_name, family_name, name mapped to three bridge attributes. You can change these values or remove them by click the trash can icon on the left-hand side. You can add additional claim mappings by clicking Add claim. If enabled, this scope must always have at least one claim.
    email Checking this box will automatically populate one standard claim email mapped to a bridge attribute. You can change these values or remove them by click the trash can icon on the left-hand side. You can add additional claim mappings by clicking Add claim. If enabled, this scope must always have at least one claim.
    Configure default scopes and claimns

    If you require additional scopes you can click the Add Custom Scope button which will allow you to type the name of a scope. If this scope should not contain claims you can continue on or you can click Add Claim under the scope name to add claim mappings for the scope.

    Configure default scopes and claimns
  4. You can adjust additional settings for your new SSO application at this time — like changing the application's name from the default value, enabling self-service, or assigning a group policy.

  5. Scroll down to the bottom of the page and click Save.

Duo Universal Prompt

The new Universal Prompt provides a simplified and accessible Duo login experience for web-based applications, offering a redesigned visual interface with security and usability enhancements.

Universal Prompt Traditional Prompt
 Duo Push in Universal Prompt  Duo Push in Traditional Prompt

We've already updated the Duo generic OIDC relying party application hosted in Duo's service to support the Universal Prompt, so there's no action required on your part to update the application itself. You can activate the Universal Prompt experience for users of new and existing Duo generic OIDC relying party applications from the Duo Admin Panel.

Before you activate the Universal Prompt for your application, it's a good idea to read the Universal Prompt Update Guide for more information about the update process and the new login experience for users.

Activate Universal Prompt

Activation of the Universal Prompt is a per-application change. Activating it for one application does not change the login experience for your other Duo applications.

The "Universal Prompt" area of the application details page shows that this application is "New Prompt Ready", with these activation control options:

  • Show traditional prompt: (Default) Your users experience Duo's traditional prompt when logging in to this application.
  • Show new Universal Prompt: Your users experience the Universal Prompt when logging in to this application.

Universal Prompt Info - Application Ready for Universal Prompt

Enable the Universal Prompt experience by selecting Show new Universal Prompt, and then scrolling to the bottom of the page to click Save.

Once you activate the Universal Prompt, the application's Universal Prompt status shows "Update Complete" here and on the Universal Prompt Update Progress report.

Universal Prompt Info - Universal Prompt Activation Complete

Should you ever want to roll back to the traditional prompt, you can return to this setting and change it back to Show traditional prompt.

Universal Update Progress

Click the See Update Progress link to view the Universal Prompt Update Progress report. This report shows the update availability and migration progress for all your Duo applications in-scope for Universal Prompt support. You can also activate the new prompt experience for multiple supported applications from the report page instead of visiting the individual details pages for each application.

Verify SSO

You can log into most applications using SSO by visiting their website directly.

You can log into your application using Duo Central, our cloud-hosted portal which allows users to access all of their applications in one spot. You can add your OIDC applications to Duo Central by following the Add Application Tiles section of the page either entering in the base URL for the application you'd like users to access or provide an RP-initiated login URL if provided by the relying party.

When you log into an application provided by Duo's Single Sign-On, you will be redirected to Duo Single Sign-On to begin authentication.

Active Directory Login

With Active Directory as the Duo SSO authentication source, enter the primary username (email address) on the Duo SSO login page and click or tap Next.

Duo Single Sign-On Login

Enter the AD primary password and click or tap Log in to continue.

Duo Single Sign-On Password

SAML Login

With a SAML identity provider as the Duo SSO authentication source, Duo SSO immediately redirects the login attempt to that SAML IdP for primary authentication. Users do not see the Duo SSO primary login screen.

Duo Authentication

Successful verification of your primary credentials by Active Directory or a SAML IdP redirects back to Duo. Complete Duo two-factor authentication when prompted and then get redirected back to the relying party application to complete the login process.

Duo Universal Prompt

*Universal Prompt experience shown.

Enable Remembered Devices

To minimize additional Duo two-factor prompts when switching between your relying party application and your other Duo Single Sign-On SAML applications, be sure to apply a shared "Remembered Devices" policy to your SAML applications.