SAML single sign-on (SSO) gives organization owners and enterprise owners on GitHub a way to control and secure access to organization resources like repositories, issues, and pull requests. Organization owners can invite your user account on GitHub to join their organization that uses SAML SSO, which allows you to contribute to the organization and retain your existing identity and contributions on GitHub.
When you access resources within an organization that uses SAML SSO, GitHub will redirect you to the organization's SAML IdP to authenticate. After you successfully authenticate with your account on the IdP, the IdP redirects you back to GitHub, where you can access the organization's resources.
注：外部协作者无需使用 IdP 进行身份验证即可访问实施 SAML SSO 的组织中的资源。 有关外部协作者的更多信息，请参阅“组织的权限级别”。
If you have recently authenticated with your organization's SAML IdP in your browser, you are automatically authorized when you access a GitHub organization that uses SAML SSO. If you haven't recently authenticated with your organization's SAML IdP in your browser, you must authenticate at the SAML IdP before you can access the organization.
You must periodically authenticate with your SAML IdP to authenticate and gain access to the organization's resources on GitHub.com. 此登录期的持续时间由 IdP 指定，一般为 24 小时。 此定期登录要求会限制访问的时长，您必须重新验证身份后才可继续访问。 You can view and manage your active SAML sessions in your security settings. For more information, see "Viewing and managing your active SAML sessions."
To use the API or Git on the command line to access protected content in an organization that uses SAML SSO, you will need to use an authorized personal access token over HTTPS or an authorized SSH key. OAuth 应用程序 access tokens are authorized by default.
If you don't have a personal access token or an SSH key, you can create a personal access token for the command line or generate a new SSH key. For more information, see "Creating a personal access token" or "Generating a new SSH key and adding it to the ssh-agent."
To use a new or existing personal access token or SSH key with an organization that enforces SAML SSO, you will need to authorize the token or authorize the SSH key for use with a SAML SSO organization. For more information, see "Authorizing a personal access token for use with SAML single sign-on" or "Authorizing an SSH key for use with SAML single sign-on."
You must have an active SAML session each time you authorize an OAuth 应用程序.