Set up sign-up and sign-in with an eBay account - Azure AD B2C

Article
10/14/2024

Before you begin, use the Choose a policy type selector at the top of this page to choose the type of policy you’re setting up. Azure Active Directory B2C offers two methods to define how users interact with your applications: through predefined user flows or through fully configurable custom policies. The steps required in this article are different for each method.

This feature is available only for custom policies. For setup steps, select Custom policy in the preceding selector.

Prerequisites

Complete the steps in Get started with custom policies in Active Directory B2C. This tutorial guides you how to update custom policy files to use your Azure AD B2C tenant configuration.
If you haven't registered a web app, register one by using the steps in register a web application.

Create an eBay application

To enable sign-in for users with an eBay account in Azure Active Directory B2C (Azure AD B2C), you need to create an application in eBay developer console. For more information, see Creating a developer account. If you don't already have an eBay developer account, sign up at https://developer.ebay.com/signin.

To create an eBay application, follow these steps:

Sign in to the eBay developer console's Application Keys with your eBay developer account credentials.
Enter an Application Title.
Under the Production, select Create a keyset.
In the Confirm the Primary Contact for this Account page, provide your account details. To complete the registration process, select Continue to Create Keys.
Copy the values of App ID (Client ID) and App ID (Client ID). You need both to add the identity provider to your tenant.
Select User Tokens, then select Get a Token from eBay via Your Application.
Select Add eBay Redirect URL.
1. Enter a valid URL for the Your privacy policy URL, for example https://www.contoso.com/privacy. The policy URL is a page you maintain to provide privacy information for your application.
2. In the Your auth accepted URL, enter https://your-tenant-name.b2clogin.cn/your-tenant-name.partner.onmschina.cn/oauth2/authresp. Replace your-tenant-name with the name of your tenant.
Select Save.

Create a policy key

You need to store the client secret that you previously recorded in your Azure AD B2C tenant.

Sign in to the Azure portal.
If you have access to multiple tenants, select the Settings icon in the top menu to switch to your Azure AD B2C tenant from the Directories + subscriptions menu.
Choose All services in the top-left corner of the Azure portal, and then search for and select Azure AD B2C.
On the Overview page, select Identity Experience Framework.
Select Policy Keys and then select Add.
For Options, choose Manual.
Enter a Name for the policy key. For example, eBaySecret. The prefix B2C_1A_ is added automatically to the name of your key.
In Secret, enter your client secret that you previously recorded.
For Key usage, select Signature.
Select Create.

Configure eBay as an identity provider

To enable users to sign in using an eBay account, you need to define the account as a claims provider that Azure AD B2C can communicate with through an endpoint. The endpoint provides a set of claims that are used by Azure AD B2C to verify that a specific user has authenticated.

You can define an eBay account as a claims provider by adding it to the ClaimsProviders element in the extension file of your policy.

Open the TrustFrameworkExtensions.xml.
Find the ClaimsProviders element. If it does not exist, add it under the root element.

Add a new ClaimsProvider as follows:

<!--
<ClaimsProviders> -->
  <ClaimsProvider>
    <Domain>ebay.com</Domain>
    <DisplayName>eBay</DisplayName>
    <TechnicalProfiles>
      <TechnicalProfile Id="eBay-OAUTH2">
        <DisplayName>eBay</DisplayName>
        <Protocol Name="OAuth2" />
        <Metadata>
          <Item Key="ProviderName">ebay.com</Item>
          <Item Key="authorization_endpoint">https://auth.ebay.com/oauth2/authorize</Item>
          <Item Key="AccessTokenEndpoint">https://api.ebay.com/identity/v1/oauth2/token</Item>
          <Item Key="ClaimsEndpoint">https://apiz.ebay.com/commerce/identity/v1/user/</Item>
          <Item Key="HttpBinding">POST</Item>
          <Item Key="BearerTokenTransmissionMethod">AuthorizationHeader</Item>
          <Item Key="token_endpoint_auth_method">client_secret_basic</Item>
          <Item Key="scope">https://api.ebay.com/oauth/api_scope/commerce.identity.readonly</Item>
          <Item Key="UsePolicyInRedirectUri">0</Item>
          <!-- Update the Client ID below to the Application ID -->
          <Item Key="client_id">Your eBay app ID</Item>
        </Metadata>
        <CryptographicKeys>
          <Key Id="client_secret" StorageReferenceId="eBaySecret"/>
        </CryptographicKeys>
        <OutputClaims>
          <OutputClaim ClaimTypeReferenceId="issuerUserId" PartnerClaimType="userId"/>
          <OutputClaim ClaimTypeReferenceId="givenName" PartnerClaimType="individualAccount.firstName"/>
          <OutputClaim ClaimTypeReferenceId="surname" PartnerClaimType="individualAccount.lastName"/>
          <OutputClaim ClaimTypeReferenceId="displayName" PartnerClaimType="username"/>
          <OutputClaim ClaimTypeReferenceId="email" PartnerClaimType="email"/>
          <OutputClaim ClaimTypeReferenceId="identityProvider" DefaultValue="ebay.com" AlwaysUseDefaultValue="true" />
          <OutputClaim ClaimTypeReferenceId="authenticationSource" DefaultValue="socialIdpAuthentication" AlwaysUseDefaultValue="true" />
        </OutputClaims>
        <OutputClaimsTransformations>
          <OutputClaimsTransformation ReferenceId="CreateRandomUPNUserName"/>
          <OutputClaimsTransformation ReferenceId="CreateUserPrincipalName"/>
          <OutputClaimsTransformation ReferenceId="CreateAlternativeSecurityId"/>
        </OutputClaimsTransformations>
        <UseTechnicalProfileForSessionManagement ReferenceId="SM-SocialLogin" />
      </TechnicalProfile>
    </TechnicalProfiles>
  </ClaimsProvider>
<!--
</ClaimsProviders> -->

Set client_id to the application ID from the application registration.
Save the file.

Add a user journey

At this point, the identity provider has been set up, but it's not yet available in any of the sign-in pages. If you don't have your own custom user journey, create a duplicate of an existing template user journey, otherwise continue to the next step.

Open the TrustFrameworkBase.xml file from the starter pack.
Find and copy the entire contents of the UserJourney element that includes Id="SignUpOrSignIn".
Open the TrustFrameworkExtensions.xml and find the UserJourneys element. If the element doesn't exist, add one.
Paste the entire content of the UserJourney element that you copied as a child of the UserJourneys element.
Rename the Id of the user journey. For example, Id="CustomSignUpSignIn".

Add the identity provider to a user journey

Now that you have a user journey, add the new identity provider to the user journey. You first add a sign-in button, then link the button to an action. The action is the technical profile you created earlier.

Find the orchestration step element that includes Type="CombinedSignInAndSignUp", or Type="ClaimsProviderSelection" in the user journey. It's usually the first orchestration step. The ClaimsProviderSelections element contains a list of identity providers that a user can sign in with. The order of the elements controls the order of the sign-in buttons presented to the user. Add a ClaimsProviderSelection XML element. Set the value of TargetClaimsExchangeId to a friendly name.
In the next orchestration step, add a ClaimsExchange element. Set the Id to the value of the target claims exchange Id. Update the value of TechnicalProfileReferenceId to the Id of the technical profile you created earlier.

The following XML demonstrates the first two orchestration steps of a user journey with the identity provider:

<OrchestrationStep Order="1" Type="CombinedSignInAndSignUp" ContentDefinitionReferenceId="api.signuporsignin">
  <ClaimsProviderSelections>
    ...
    <ClaimsProviderSelection TargetClaimsExchangeId="eBayExchange" />
  </ClaimsProviderSelections>
  ...
</OrchestrationStep>

<OrchestrationStep Order="2" Type="ClaimsExchange">
  ...
  <ClaimsExchanges>
    <ClaimsExchange Id="eBayExchange" TechnicalProfileReferenceId="eBay-OAUTH2" />
  </ClaimsExchanges>
</OrchestrationStep>

Configure the relying party policy

The relying party policy, for example SignUpSignIn.xml, specifies the user journey which Azure AD B2C will execute. Find the DefaultUserJourney element within relying party. Update the ReferenceId to match the user journey ID, in which you added the identity provider.

In the following example, for the CustomSignUpSignIn user journey, the ReferenceId is set to CustomSignUpSignIn:

<RelyingParty>
  <DefaultUserJourney ReferenceId="CustomSignUpSignIn" />
  ...
</RelyingParty>

Upload the custom policy

Sign in to the Azure portal.
Select the Directory + Subscription icon in the portal toolbar, and then select the directory that contains your Azure AD B2C tenant.
In the Azure portal, search for and select Azure AD B2C.
Under Policies, select Identity Experience Framework.
Select Upload Custom Policy, and then upload the two policy files that you changed, in the following order: the extension policy, for example TrustFrameworkExtensions.xml, then the relying party policy, such as SignUpSignIn.xml.

Test your custom policy

Select your relying party policy, for example B2C_1A_signup_signin.
For Application, select a web application that you previously registered. The Reply URL should show https://jwt.ms.
Select the Run now button.
From the sign-up or sign-in page, select eBay to sign in with eBay account.

If the sign-in process is successful, your browser is redirected to https://jwt.ms, which displays the contents of the token returned by Azure AD B2C.

Set up sign-up and sign-in with an eBay account using Azure Active Directory B2C