SAML Single Sign On (SSO) into Bitbucket using Azure AD

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Bitbucket SAML app gives the ability to enable SAML Single Sign On for Bitbucket Software. Bitbucket Software is compatible with all SAML Identity Providers. Here we will go through a guide to configure SSO between Bitbucket and Azure AD. By the end of this guide, Azure AD users should be able to login and register to Bitbucket Software.

Step 1: Setup Azure AD as Identity Provider

    miniorange img Prerequisites:

    Copy these values from the Service Provider Info tab of the SAML plugin.

    • SP Entity ID
    • ACS URL

    miniorange img Instructions:

Azure AD setup through App Registrations

  • Log in to Azure AD Portal

  • Select Azure Active Directory ⇒ App Registrations. Click on New Application Registration.

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  • Assign a Name and choose the account type.In the Redirect URI field, provide the ACS URL provided in Service Provider Info tab of the plugin and click on Register button.
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  • Now, navigate to Expose an API menu option and Click the Set button and replace the APPLICATION ID URI with the plugin's SP Entity ID

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  • Go back to Azure Active Directory ⇒ App Registrations window and click on Endpoints link.

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  • This will open up a window with multiple URLs listed there. Copy the Federation Metadata Document URL. This will be required while configuring the SAML plugin.

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Azure AD setup through Enterprise Applications

  • Log in to Azure AD Portal

  • Select Azure Active Directory ⇒ Enterprise Applications.

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  • Click on New Application.

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  • Click on Non-gallery application section and enter the name for your app and click on Add button.

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  • Click on Single sign-on from the application's left-hand navigation menu. The next screen presents the options for configuring single sign-on. Click on SAML.

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  • Enter the SP Entity ID for Identifier and the ACS URL for Reply URL from Service Provider Info tab of the plugin.

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  • By default, the following Attributes will be sent in the SAML token. You can view or edit the claims sent in the SAML token to the application under the Attributes tab.

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  • Copy App Federation Metadata Url. This will be used while configuring the SAML plugin.

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  • Click on User and groups from the applications left-hand navigation menu. The next screen presents the options for assigning the users/groups to the application.

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Step 2: Setup Bitbucket as Service Provider

Now we will go through the steps to setup Bitbucket as a Service Provider using miniOrange add-on:

Configuring Single IDP

We can configure IDP settings in 3 ways:

A. By Metadata URL

  • Click on Import from Metadata in Configure IDP tab
  • Select IDP: Import From Metadata URL
  • Enter IDP metadata URL: Enter your metadata URL
  • If your IDP changes certificates at intervals, you can select Refresh metadata periodically. Select 5 minutes for the best results.
  • Click Import

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B. By uploading Metadata XML file

  • Click on Import from Metadata in Configure IDP tab
  • Select IDP: Import from Metadata File
  • Upload metadata file
  • Click Import

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C. Manual Configuration

Go to Configure IDP tab and enter the following details

  • IDP Entity ID
  • Single Sign On URL
  • Single Logout URL
  • X.509 Certificate
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Step 3: Setting up Bitbucket user profile attributes

    We will be setting up user profile attributes for Bitbucket. If your users are stored in a directory that is Read Only, please check Disable Attribute Mapping in User Profile tab and follow steps given in Matching a User.

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    a. Finding correct attributes
  • Go to Configure IDP tab. Scroll down and click on Test Configuration.
  • You will see all the values returned by your IDP to Bitbucket in a table. If you don't see value for First Name, Last Name, Email or Username, make the required settings in your IDP to return this information.
  • Once you see all the values in Test Configuration, keep the window open and go to User Profile tab.
    • b. Setting profile attributes
  • In this tab, fill the values by matching the name of the attribute. For instance, if the Attribute Name in the Test Configuration window is NameID, enter NameID against Username
  • Setting up both Username and Email is required if you want to let users register. If you want existing users to the only login, configure the attribute using which you will match the user in Bitbucket.
    • c. Matching a User
    When the user logs into Bitbucket, one of the user's data/attribute coming in from the IDP is used to search the user in Bitbucket. This is used to detect the user in Bitbucket and log in the user to the same account.
  • Go to User Profile tab
  • Select Username or Email for Login/Search Bitbucket user account by
  • Enter the attribute name from IDP which corresponds to Username or Email using Finding Correct Attributes

Step 4: Assigning groups to users

    We will be setting up user group attributes for Bitbucket. If your users are stored in a directory that is Read Only, please check Disable Group Mapping in User Groups tab and skip to Setting default group.

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    a. Finding Group Attribute
  • Just like we found Attribute Name for User Profile attributes, we find group attribute.
  • Go to Configure IDP tab. Scroll down and click on Test Configuration.
  • You will see all the values returned by your IDP to Bitbucket in a table. If you don't see value with groups, make the required settings in your IDP to return group names.
  • Once you see all the values in Test Configuration, keep the window open and go to User Groups tab.
  • Enter the Attribute Name of group against Group Attribute
  • At the bottom of the page, all groups in Bitbucket are shown. You can map groups in IDP which correspond to Bitbucket groups. For example, if you want all users in dev-ops and dev groups in IDP to be added to crucible-users, you will need to enter dev-ops;dev against crucible-users
  • If you want user mapping to work for only limited groups in Bitbucket, check the option Update User Groups

    • b. Setting default group
  • Select the users' Default Group in the tab User Groups. If no group is mapped, users are added by default to this group.
  • You can enable default groups for all users or only new users using the option Enable Default Groups for.

Step 5: SSO Settings

    The settings in SSO Settings tab define the user experience for Single Sign On.
    a. Sign In Settings
  • Set button text for button on login page using Login Button Text
  • Set redirect URL after login using Relay State. Keep this empty for coming back to the same page user started from
  • Enable Auto-redirect to IDP if you want to allow users to login only using IDP. Enable backdoor for emergency
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    b. Sign Out Settings
    Set Logout URL or Logout Template to redirect users after logout action.

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    c. SSO Error Settings
    Set error template to redirect users to a custom error page instead of login page. Use this if you have Auto-redirect to IDP enabled.

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Step 6: Git Authentication Configuration

    miniorange img Configure Azure AD:

    • Sign in to the Azure Portal
    • Click on All Service in the left hand nav and choose Azure Active Directory.
    • In the Azure Active Directory panel, click on the App Registration and choose New Application Registration.
    • Enter friendly name for your application, for example Bitbucket-Git-App and Select Native as the Application Type.
    • For the redirect URL enter https:///Bitbucket-Git-App. Replace “your_tenant_name” with the name or id of your Azure AD Tenant.
    • Click Create to create the Application.
    • In the succeeding page, Find the Application ID and copy it to clipboard. You will need it to configure the plugin.
    • Click on the settings and then choose the Required permission.
    • Click on the Add, then Select and API, select Microsoft Graph and Windows Azure Active Directory, provide permission.
    • Navigate back to the Required Permission section and click on the Grant Permission.

    miniorange img Configure Bitbucket:

    • Navigate to the Git Authentication Configuration tab, select Azure AD as IdP and configure the application Id that you have copied from in the step 7.

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