c# Connect to Sharepoint with ClientContext appId and certificat ThumbPrint
using Microsoft.Identity.Client;
using Microsoft.SharePoint.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
namespace MY.PNP.Powershell.EXT.CSOM
{
public class CsomContext : IDisposable
{
public ClientContext _clientContext;
public ClientRuntimeContext _context;
private async Task GetAccessToken(string tenantName, string clientId, string thumbprint)
{
var certificate = GetCert(thumbprint);
var authority = $"https://login.microsoftonline.com/{tenantName}.onmicrosoft.com/";
var azureApp = ConfidentialClientApplicationBuilder.Create(clientId)
.WithAuthority(authority)
.WithCertificate(certificate)
.Build();
var scopes = new string[] { $"https://{tenantName}.sharepoint.com/.default" };
var authResult = await azureApp.AcquireTokenForClient(scopes).ExecuteAsync();
return authResult.AccessToken;
}
public async Task CallClientObjectModel(string tenantName, string url, string clientId, string thumbprint)
{
var token = await GetAccessToken(tenantName, clientId, thumbprint);
var siteUrl = url;//;$"https://{tenantName}.sharepoint.com";
var context = new ClientContext(siteUrl);
context.ExecutingWebRequest += (s, e) =>
{
e.WebRequestExecutor.RequestHeaders["Authorization"] =
"Bearer " + token;
};
var web = context.Web;
context.Load(web);
context.ExecuteQuery();
Console.WriteLine(web.Title);
Console.WriteLine(web.Url);
_context = web.Context;
_clientContext = context;
}
private X509Certificate2 GetCert(string thumbprint)
{
X509Store certStore = new X509Store(StoreName.My, StoreLocation.CurrentUser);
certStore.Open(OpenFlags.ReadOnly);
X509Certificate2Collection certCollection = certStore.Certificates.Find(
X509FindType.FindByThumbprint,
// Replace below with your cert's thumbprint
thumbprint,
false);
X509Certificate2 cert = null;
// Get the first cert with the thumbprint
if (certCollection.Count > 0)
{
cert = certCollection[0];
// Use certificate
Console.WriteLine(cert.FriendlyName);
}
certStore.Close();
return cert;
}
public void Dispose()
{
if (_context != null)
_context.Dispose();
if (_clientContext != null)
_clientContext.Dispose();
}
}
}
