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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.Identity.Client;
using Microsoft.Extensions.Configuration;
using System.Linq;
using System.IdentityModel.Tokens.Jwt;
using Microsoft.Graph;
using System.Net.Http;
using System.Text.Json;
/// <summary>
/// https://docs.microsoft.com/en-us/azure/active-directory/develop/access-tokens
/// </summary>
namespace MSAL.Net_GroupOveragesClaim
{
class Program
{
static readonly HttpClient _httpClient = new HttpClient();
static AzureConfig _config = null;
public static AzureConfig AzureSettings
{
get
{
// only load this once when the app starts.
// To reload, you will have to set the variable _config to null again before calling this property
if (_config == null)
{
_config = new AzureConfig();
IConfiguration builder = new ConfigurationBuilder()
.SetBasePath(System.IO.Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.Build();
ConfigurationBinder.Bind(builder.GetSection("Azure"), _config);
}
return _config;
}
}
static IPublicClientApplication _msal_publicClient;
static IPublicClientApplication Msal_PublicClient
{
get
{
if(_msal_publicClient == null)
{
IPublicClientApplication app = PublicClientApplicationBuilder
.Create(AzureSettings.ClientId)
.WithAuthority(AzureCloudInstance.AzurePublic, AzureSettings.TenantId)
.WithRedirectUri(AzureSettings.CallbackPath)
.Build();
_msal_publicClient = app;
}
return _msal_publicClient;
}
}
// use this for the client credentials grant flow
static IConfidentialClientApplication _msal_confidentialClient;
static IConfidentialClientApplication Msal_ConfidentialClient
{
get
{
if(_msal_confidentialClient == null)
{
_msal_confidentialClient = ConfidentialClientApplicationBuilder
.Create(AzureSettings.ClientId)
.WithClientSecret(AzureSettings.ClientSecret)
.WithAuthority(AadAuthorityAudience.AzureAdMyOrg)
.WithTenantId(AzureSettings.TenantId)
.Build();
}
return _msal_confidentialClient;
}
}
static string userId = string.Empty;
/// <summary>
/// Main method that runs this application
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Console.WriteLine("Starting test application...");
string accessToken = string.Empty;
string graphToken = string.Empty;
bool client_credentials = false;
// Only an interactive flow makes sense to log into this application
accessToken = GetAccessToken_UserInteractive(AzureSettings.AppScopes).Result;
// get the group overages claim if it exists in the access token
string groupOveragesUrl = Get_GroupsOverageClaimURL(accessToken);
// if there is a value for groupOveragesUrl, then we need to make a graph call for groups
Console.WriteLine($"\nNew Microsoft Graph Group Membership URL:\n{groupOveragesUrl}");
if(groupOveragesUrl != string.Empty)
{
bool loop = true;
do
{
Console.WriteLine($"\nHow do you want to get an access token for the Microsoft Graph request?");
Console.WriteLine($"1: User token for the currently signed in user ( refresh token flow )");
Console.WriteLine($"2: Application token using the client credentials grant flow");
Console.WriteLine($"Any other key to Exit");
Console.Write("Enter choice > ");
string choice = Console.ReadLine();
switch (choice.Trim())
{
case "1":
graphToken = Get_GraphTokenUsingRefeshToken(AzureSettings.GraphScopes).Result;
break;
case "2":
graphToken = GetAccessToken_ClientCredentials(new string[] { "https://graph.microsoft.com/.default" }).Result;
client_credentials = true;
break;
default:
Console.WriteLine("Exiting...");
loop = false;
break;
}
choice = string.Empty;
if (loop)
{
Console.WriteLine($"How do you want to get the groups?\n1: .Net HTTP Request\n2: Graph .Net SDK");
Console.Write("Enter choice > ");
choice = Console.ReadLine();
switch (choice.Trim())
{
case "1":
Console.WriteLine("Getting group list via a .Net HTTP request...");
Get_Groups_HTTP_Method(graphToken, groupOveragesUrl).Wait();
break;
case "2":
Console.WriteLine("Getting group list via the Graph .Net SDK...");
Get_Groups_GraphSDK_Method(graphToken, !client_credentials).Wait();
break;
default:
Console.WriteLine("Not a valid choice...");
break;
}
}
} while (loop);
} else
{
Console.WriteLine("\nNo group overages claim found in token...");
Console.WriteLine($"\nPress any key to exit...");
Console.ReadKey();
}
}
/// <summary>
/// Entry point to make the request to Microsoft graph using the .Net HTTP Client
/// </summary>
/// <param name="graphToken"></param>
/// <returns></returns>
private static async Task Get_Groups_HTTP_Method(string graphToken, string url)
{
List<Group> groupList = new List<Group>();
groupList = await Graph_Request_viaHTTP(graphToken, url);
foreach (Group g in groupList)
{
Console.WriteLine($"Group Id: {g.Id} : Display Name: {g.DisplayName}");
}
}
/// <summary>
/// Entry point to make the request to Microsoft Graph using the Graph sdk and outputs the list to the console.
/// </summary>
/// <param name="graphToken"></param>
/// <returns></returns>
private static async Task Get_Groups_GraphSDK_Method(string graphToken, bool me_endpoint)
{
List<Group> groupList = new List<Group>();
groupList = await Get_GroupList_GraphSDK(graphToken, me_endpoint);
foreach (Group g in groupList)
{
Console.WriteLine($"Group Id: {g.Id} : Display Name: {g.DisplayName}");
}
}
/// <summary>
/// Signs the current user in and gets an access token for the scopes specified
/// </summary>
/// <param name="scopes"></param>
/// <returns></returns>
private static async Task<string> GetAccessToken_UserInteractive(string[] scopes)
{
string accessToken = string.Empty;
AuthenticationResult authResult = null;
IEnumerable<IAccount> accounts = await Msal_PublicClient.GetAccountsAsync();
try
{
authResult = await Msal_PublicClient.AcquireTokenSilent(scopes, accounts.FirstOrDefault()).ExecuteAsync();
accessToken = authResult.AccessToken;
}
catch (MsalUiRequiredException)
{
authResult = await Msal_PublicClient.AcquireTokenInteractive(scopes).ExecuteAsync();
accessToken = authResult.AccessToken;
}
catch (Exception ex)
{
Console.WriteLine($"Authentication error: {ex.Message}");
}
Console.WriteLine($"Access token: {accessToken}\n");
return accessToken;
}
private static async Task<string> GetAccessToken_ClientCredentials(string[] scopes)
{
string accessToken = string.Empty;
AuthenticationResult authResult = null;
try
{
authResult = await Msal_ConfidentialClient.AcquireTokenForClient(scopes).ExecuteAsync();
accessToken = authResult.AccessToken;
} catch ( Exception ex)
{
Console.WriteLine($"Authentication error: {ex.Message}");
}
Console.WriteLine($"Access token: {accessToken}\n");
return accessToken;
}
/// <summary>
/// Exchanges the current cached refresh token for an access token for the scopes specified.
/// This will only work for previously consented scopes.
/// </summary>
/// <param name="scopes"></param>
/// <returns></returns>
private static async Task<string> Get_GraphTokenUsingRefeshToken(string[] scopes)
{
string accessToken = string.Empty;
AuthenticationResult authResult = null;
IEnumerable<IAccount> accounts = await Msal_PublicClient.GetAccountsAsync();
try
{
authResult = await Msal_PublicClient.AcquireTokenSilent(scopes, accounts.FirstOrDefault()).ExecuteAsync();
accessToken = authResult.AccessToken;
}
catch (MsalUiRequiredException)
{
authResult = await Msal_PublicClient.AcquireTokenInteractive(scopes).ExecuteAsync();
accessToken = authResult.AccessToken;
}
catch (Exception ex)
{
Console.WriteLine($"Authentication error: {ex.Message}");
}
Console.WriteLine($"Access token: {accessToken}\n");
return accessToken;
}
/// <summary>
/// Looks for a groups overage claim in an access token and returns the value if found.
/// </summary>
/// <param name="accessToken"></param>
/// <returns></returns>
private static string Get_GroupsOverageClaimURL(string accessToken)
{
JwtSecurityToken token = new JwtSecurityTokenHandler().ReadJwtToken(accessToken);
string claim = string.Empty;
string sources = string.Empty;
string originalUrl = string.Empty;
string newUrl = string.Empty;
try
{
// use the user id in the new graph url since the old overage link is for aad graph which is being deprecated.
userId = token.Claims.First(c => c.Type == "oid").Value;
// getting the claim name to properly parse from the claim sources but the next 3 lines of code are not needed,
// just for demonstration purposes only so you can see the original value that was used in the token.
claim = token.Claims.First(c => c.Type == "_claim_names").Value;
sources = token.Claims.First(c => c.Type == "_claim_sources").Value;
originalUrl = sources.Split("{\"" + claim.Split("{\"groups\":\"")[1].Replace("}","").Replace("\"","") + "\":{\"endpoint\":\"")[1].Replace("}","").Replace("\"", "");
// make sure the endpoint is specific for your tenant -- .gov for example for gov tenants, etc.
newUrl = $"https://graph.microsoft.com/v1.0/users/{userId}/memberOf?$orderby=displayName&$count=true";
Console.WriteLine($"Original Overage URL:\n{originalUrl}");
//Console.WriteLine($"New URL: {newUrl}");
} catch {
// no need to do anything because the claim does not exist
}
return newUrl;
}
/// <summary>
/// Calls Microsoft Graph via a HTTP request. Handles paging in the request
/// </summary>
/// <param name="user_access_token"></param>
/// <returns>List of Microsoft Graph Groups</returns>
private static async Task<List<Group>> Graph_Request_viaHTTP(string user_access_token, string url)
{
string json = string.Empty;
//string url = "https://graph.microsoft.com/v1.0/me/memberOf?$orderby=displayName&$count=true";
List<Group> groups = new List<Group>();
// todo: check for the count parameter in the request and add if missing
/*
* refer to this documentation for usage of the http client in .net
* https://docs.microsoft.com/en-us/dotnet/api/system.net.http.httpclient?view=net-5.0
*
*/
// add the bearer token to the authorization header for this request
_httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue( "Bearer", user_access_token);
// adding the consistencylevel header value if there is a $count parameter in the request as this is needed to get a count
// this only needs to be done one time so only add it if it does not exist already. It is case sensitive as well.
// if this value is not added to the header, the results will not sort properly -- if that even matters for your scenario
if(url.Contains("&$count", StringComparison.OrdinalIgnoreCase))
{
if (!_httpClient.DefaultRequestHeaders.Contains("ConsistencyLevel"))
{
_httpClient.DefaultRequestHeaders.Add("ConsistencyLevel", "eventual");
}
}
// while loop to handle paging
while(url != string.Empty)
{
HttpResponseMessage response = await _httpClient.GetAsync(new Uri(url));
url = string.Empty; // clear now -- repopulate if there is a nextlink value.
if (response.IsSuccessStatusCode)
{
json = await response.Content.ReadAsStringAsync();
// Console.WriteLine(json);
using (JsonDocument document = JsonDocument.Parse(json))
{
JsonElement root = document.RootElement;
// check for the nextLink property to see if there is paging that is occuring for our while loop
if (root.TryGetProperty("@odata.nextLink", out JsonElement nextPage))
{
url = nextPage.GetString();
}
JsonElement valueElement = root.GetProperty("value"); // the values
// loop through each value in the value array
foreach (JsonElement value in valueElement.EnumerateArray())
{
if (value.TryGetProperty("@odata.type", out JsonElement objtype))
{
// only getting groups -- roles will show up in this graph query as well.
// If you want those too, then remove this if filter check
if (objtype.GetString() == "#microsoft.graph.group")
{
Group g = new Group();
// specifically get each property you want here and populate it in our new group object
if (value.TryGetProperty("id", out JsonElement id)) { g.Id = id.GetString(); }
if (value.TryGetProperty("displayName", out JsonElement displayName)) { g.DisplayName = displayName.GetString(); }
groups.Add(g);
}
}
}
}
} else
{
Console.WriteLine($"Error making graph request:\n{response.ToString()}");
}
} // end while loop
return groups;
}
/// <summary>
/// Calls the Me.MemberOf endpoint in Microsoft Graph and handles paging
/// </summary>
/// <param name="graphToken"></param>
/// <returns>List of Microsoft Graph Groups</returns>
private static async Task<List<Group>> Get_GroupList_GraphSDK(string graphToken, bool use_me_endpoint)
{
GraphServiceClient client;
Authentication.ManualTokenProvider authProvider = new Authentication.ManualTokenProvider(graphToken);
client = new GraphServiceClient(authProvider);
IUserMemberOfCollectionWithReferencesPage membershipPage = null;
HeaderOption option = new HeaderOption("ConsistencyLevel","eventual");
if (use_me_endpoint)
{
if (!client.Me.MemberOf.Request().Headers.Contains(option))
{
client.Me.MemberOf.Request().Headers.Add(option);
}
membershipPage = await client.Me.MemberOf
.Request()
.OrderBy("displayName&$count=true") // todo: find the right way to add the generic query string value for count
.GetAsync();
} else
{
if (!client.Users[userId].MemberOf.Request().Headers.Contains(option))
{
client.Users[userId].MemberOf.Request().Headers.Add(option);
}
membershipPage = await client.Users[userId].MemberOf
.Request()
.OrderBy("displayName&$count=true")
.GetAsync();
}
List<Group> allItems = new List<Group>();
if(membershipPage != null)
{
foreach(DirectoryObject o in membershipPage)
{
if(o is Group)
{
allItems.Add((Group)o);
}
}
while (membershipPage.AdditionalData.ContainsKey("@odata.nextLink") && membershipPage.AdditionalData["@odata.nextLink"].ToString() != string.Empty)
{
membershipPage = await membershipPage.NextPageRequest.GetAsync();
foreach (DirectoryObject o in membershipPage)
{
if (o is Group)
{
allItems.Add(o as Group);
}
}
}
}
return allItems;
}
}
}