Admin ConsoleLogin with SSO

AWS SAML Implementation

This article contains AWS IAM Identity Center-specific help for configuring login with SSO via SAML 2.0. For help configuring login with SSO for another IdP, refer to SAML 2.0 Configuration.

Configuration involves working simultaneously within the Bitwarden web app and the AWS Console. As you proceed, we recommend having both readily available and completing steps in the order they are documented.

tip

Already an SSO expert? Skip the instructions in this article and download screenshots of sample configurations to compare against your own.

Download Sample

Open SSO in the web app

Log in to the Bitwarden web app and open the Admin Console using the product switcher:

Product switcher
Product switcher

Open your organization's SettingsSingle sign-on screen:

SAML 2.0 configuration
SAML 2.0 configuration

If you haven't already, create a unique SSO identifier for your organization and select SAML from the the Type dropdown. Keep this screen open for easy reference.

You can turn off the Set a unique SP entity ID option at this stage if you wish. Doing so will remove your organization ID from your SP entity ID value, however in almost all cases it is recommended to leave this option on.

tip

There are alternative Member decryption options. Learn how to get started using SSO with trusted devices or Key Connector.

Create an application

In the AWS Console, navigate to IAM Identity Center, select Application assignments Applications from the navigation, and select the Add application button:

Add a new application
Add a new application

On the Select application type screen, select I have an application I want to set up and SAML 2.0.

Configure application

On the Configure application screen:

  1. Give the application a unique, Bitwarden-specific Display name.

  2. Copy the IAM Identity Center sign-in URL and IAM Identity Center issuer URL, and download the IAM Identity Center Certificate:

    IAM Identity Center metadata
    IAM Identity Center metadata
  3. In the Application start URL field, specify the login URL from which users will access Bitwarden. For cloud-hosted customers, this is always https://vault.bitwarden.com/#/sso or https://vault.bitwarden.eu/#/sso. For self-hosted instances, this is determined by your configured server URL, for example https://your.domain/#/sso:

    IAM Identity Center application properties
    IAM Identity Center application properties

  4. In the Application metadata section, select the option to Manually type your metadata values:

    Enter metadata values
    Enter metadata values

    In that section, configure the following fields:

Field

Description

Application ACS URL

Set this field to the pre-generated Assertion Consumer Service (ACS) URL.

This automatically-generated value can be copied from the organization's SettingsSingle sign-on screen and will vary based on your setup.

Application SAML audience

Set this field to the pre-generated SP Entity ID.

This automatically-generated value can be copied from the organization's SettingsSingle sign-on screen and will vary based on your setup.

When you are finished, select Submit.

Attribute mappings

Once the application is created, open it again from the Application assignments Applications screen. Use the Actions dropdown to Edit attribute mappings:

Edit attribute mappings
Edit attribute mappings

Configure the following mappings and Save changes:

User attribute in the application

Maps to this string value or user attribute in IAM Identity Center

Format

Subject

${user:email}

emailAddress

email

${user:email}

Unspecified

Assigned users

From your application, scroll down to the Assigned users and groups section and select the Assign users and groups button:

Assign users and groups
Assign users and groups

Assign users and groups to the application.

Back to the web app

At this point, you have configured everything you need within the context of the AWS Console. Return to the Bitwarden web app to complete configuration.

The Single sign-on screen separates configuration into two sections:

  • SAML service provider configuration will determine the format of SAML requests.

  • SAML identity provider configuration will determine the format to expect for SAML responses.

Service provider configuration

Service provider configuration should already be complete, however you may choose to edit any of the following fields:

Field

Description

Name ID Format

Set to Email Address.

Outbound Signing Algorithm

The algorithm Bitwarden will use to sign SAML requests.

Signing Behavior

Whether/when SAML requests will be signed.

Minimum Incoming Signing Algorithm

By default, IAM Identity Center will sign with SHA-256. Unless you have changed this, select sha256 from the dropdown.

Want Assertions Signed

Whether Bitwarden expects SAML assertions to be signed.

Validate Certificates

Check this box when sing trusted and valid certificates from your IdP through a trusted CA. Self-signed certificates may fail unless proper trust chains are configured within the Bitwarden Login with SSO docker image.

When you are done with the service provider configuration, Save your work.

Identity provider configuration

Identity provider configuration will often require you to refer back to the AWS Console to retrieve application values:

Field

Description

Entity ID

Enter the IAM Identity Center issuer URL, retrieved from the IAM Identity Center metadata section for your application in the AWS Console. This field is case sensitive.

Binding Type

Set to HTTP POST or Redirect.

Single Sign On Service URL

Enter the IAM Identity Center sign-in URL, retrieved from the IAM Identity Center metadata section for your application in the AWS Console.

Single Log Out Service URL

Login with SSO currently does not support SLO. This option is planned for future development, however you may pre-configure it with the IAM Identity Center sign-out URL retrieved from the IAM Identity Center metadata section for your application in the AWS Console.

X509 Public Certificate

Paste the downloaded certificate, removing:

-----BEGIN CERTIFICATE-----

and

-----END CERTIFICATE-----

The certificate value is case sensitive, extra spaces, carriage returns, and other extraneous characters will cause certificate validation to fail.

Outbound Signing Algorithm

By default, IAM Identity Center will sign with sha256. Unless you have changed this, select sha256 from the dropdown.

Disable Outbound Logout Requests

Login with SSO currently does not support SLO. This option is planned for future development.

Want Authentication Requests Signed

Whether IAM Identity Center expects SAML requests to be signed.

note

When completing the X509 certificate, take note of the expiration date. Certificates will have to be renewed in order to prevent any disruptions in service to SSO end users. If a certificate has expired, Admin and Owner accounts will always be able to log in with email address and master password.

When you are done with the identity provider configuration, Save your work.

tip

You can require users to log in with SSO by activating the single sign-on authentication policy. Please note, this will require activating the single organization policy as well. Learn more.

Test the configuration

Once your configuration is complete, test it by navigating to https://vault.bitwarden.com, entering your email address, selecting Continue, and selecting the Enterprise Single-On button:

Log in options screen
Log in options screen

Enter the configured organization identifier and select Log In. If your implementation is successfully configured, you will be redirected to the IAM Identity Center login screen:

AWS login screen
AWS login screen

After you authenticate with your IAM Identity Center credentials, enter your Bitwarden master password to decrypt your vault!

note

Bitwarden does not support unsolicited responses, so initiating login from your IdP will result in an error. The SSO login flow must be initiated from Bitwarden.

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