Add flag to send certificate chain for subject name / issuer based auth in Connect-MgGraph

Author: nayanshah

src/Authentication/Authentication.Core/Interfaces/IAuthContext.cs

@@ -47,6 +47,7 @@ public interface IAuthContext
         string Account { get; set; }
         string CertificateThumbprint { get; set; }
         string CertificateSubjectName { get; set; }
+        bool SendCertificateChain {  get; set; }
         X509Certificate2 Certificate { get; set; }
         ContextScope ContextScope { get; set; }
         Version PSHostVersion { get; set; }

src/Authentication/Authentication.Core/Utilities/AuthenticationHelpers.cs

@@ -184,7 +184,8 @@ private static async Task<ClientCertificateCredential> GetClientCertificateCrede
             var clientCredentialOptions = new ClientCertificateCredentialOptions
             {
                 AuthorityHost = new Uri(GetAuthorityUrl(authContext)),
-                TokenCachePersistenceOptions = GetTokenCachePersistenceOptions(authContext)
+                TokenCachePersistenceOptions = GetTokenCachePersistenceOptions(authContext),
+                SendCertificateChain = authContext.SendCertificateChain
             };
             var clientCertificateCredential = new ClientCertificateCredential(authContext.TenantId, authContext.ClientId, GetCertificate(authContext), clientCredentialOptions);
             return await Task.FromResult(clientCertificateCredential).ConfigureAwait(false);

src/Authentication/Authentication/Cmdlets/ConnectMgGraph.cs

@@ -46,6 +46,9 @@ public class ConnectMgGraph : PSCmdlet, IModuleAssemblyInitializer, IModuleAssem
         [Parameter(ParameterSetName = Constants.AppCertificateParameterSet, Position = 3, HelpMessage = HelpMessages.CertificateThumbprint)]
         public string CertificateThumbprint { get; set; }
 
+        [Parameter(ParameterSetName = Constants.AppCertificateParameterSet, HelpMessage = HelpMessages.SendCertificateChain)]
+        public bool SendCertificateChain { get; set; }
+
         [Parameter(Mandatory = false, ParameterSetName = Constants.AppCertificateParameterSet, HelpMessage = HelpMessages.Certificate)]
         public X509Certificate2 Certificate { get; set; }
 
@@ -200,6 +203,7 @@ private async Task ProcessRecordAsync()
                             authContext.ClientId = ClientId;
                             authContext.CertificateThumbprint = CertificateThumbprint;
                             authContext.CertificateSubjectName = CertificateSubjectName;
+                            authContext.SendCertificateChain = SendCertificateChain;
                             authContext.Certificate = Certificate;
                             // Default to Process but allow the customer to change this via `-ContextScope`.
                             authContext.ContextScope = this.IsParameterBound(nameof(ContextScope)) ? ContextScope : ContextScope.Process;

src/Authentication/Authentication/Constants.cs

@@ -35,6 +35,7 @@ public static class HelpMessages
             public const string ClientId = "The client id of your application.";
             public const string CertificateSubjectName = "The subject distinguished name of a certificate. The Certificate will be retrieved from the current user's certificate store.";
             public const string CertificateThumbprint = "The thumbprint of your certificate. The Certificate will be retrieved from the current user's certificate store.";
+            public const string SendCertificateChain = "Include x5c header in client claims when acquiring a token to enable subject name / issuer based authentication using given certificate.";
             public const string Certificate = "An X.509 certificate supplied during invocation.";
             public const string ClientSecretCredential = "The PSCredential object provides the application ID and client secret for service principal credentials. For more information about the PSCredential object, type Get-Help Get-Credential.";
             public const string AccessToken = "Specifies a bearer token for Microsoft Graph service. Access tokens do timeout and you'll have to handle their refresh.";

src/Authentication/Authentication/Models/AuthContext.cs

@@ -19,6 +19,7 @@ public class AuthContext : IAuthContext
         public TokenCredentialType TokenCredentialType { get; set; }
         public string CertificateThumbprint { get; set; }
         public string CertificateSubjectName { get; set; }
+        public bool SendCertificateChain { get; set; }
         public string Account { get; set; }
         public string AppName { get; set; }
         public ContextScope ContextScope { get; set; }