How to create a sharepoint current user context using

Question

I am trying to create the current user's SharePoint context using the following details:

• Client ID
• Tenant ID
• Certificate

I am using UseOpenIdConnectAuthentication and ClaimsPrincipal for this process. Specifically, I want to understand if it's possible to use these components to create the current user's SharePoint context.

Answer 1

What is the version of your SharePoint? SharePoint Online or SharePoint Server Subscription Edition?

If you are using SharePoint Online, as this authentication method is only supported in SharePoint Server Subscription Edition, it is not possible.

If you are using SharePoint Server Subscription Edition, first you need to obtain the claims from the OIDC token after authenticating the user, then create the ClientContext in the SharePoint Server Subscription Edition.

Here is a simplified example of how you might set this up in code:

ClientContext clientContext = new ClientContext(<sharepointurl>);
clientContext.AuthenticationMode = ClientAuthenticationMode.Anonymous;
clientContext.ExecutingWebRequest += (sender, e) =>
{
    e.WebRequestExecutor.RequestHeaders["Authorization"] = "Bearer " + accessToken; // Use your access token
};

Reference:

https://learn.microsoft.com/en-us/sharepoint/security-for-sharepoint-server/oidc-1-0-authentication

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Answer 2

@Emily Du-MSFT
Thank you for your reply. We are using SharePoint Online and have some restrictions as the system was developed in .NET Framework 4.5, making certain latest code implementations inapplicable. Is there a workaround?