Add an opt-out DisableTelemetry option in the OpenID Connect middleware

src/Microsoft.AspNetCore.Authentication.OpenIdConnect/OpenIdConnectHandler.cs

@@ -161,6 +161,7 @@ protected override async Task HandleSignOutAsync(SignOutContext signout)
 
             var message = new OpenIdConnectMessage()
             {
+                EnableTelemetryParameters = !Options.DisableTelemetry,
                 IssuerAddress = _configuration?.EndSessionEndpoint ?? string.Empty,
 
                 // Redirect back to SigneOutCallbackPath first before user agent is redirected to actual post logout redirect uri
@@ -309,6 +310,7 @@ protected override async Task<bool> HandleUnauthorizedAsync(ChallengeContext con
             var message = new OpenIdConnectMessage
             {
                 ClientId = Options.ClientId,
+                EnableTelemetryParameters = !Options.DisableTelemetry,
                 IssuerAddress = _configuration?.AuthorizationEndpoint ?? string.Empty,
                 RedirectUri = BuildRedirectUri(Options.CallbackPath),
                 Resource = Options.Resource,
@@ -1023,6 +1025,7 @@ private async Task<AuthorizationCodeReceivedContext> RunAuthorizationCodeReceive
                 ClientSecret = Options.ClientSecret,
                 Code = authorizationResponse.Code,
                 GrantType = OpenIdConnectGrantTypes.AuthorizationCode,
+                EnableTelemetryParameters = !Options.DisableTelemetry,
                 RedirectUri = properties.Items[OpenIdConnectDefaults.RedirectUriForCodePropertiesKey]
             };
 

src/Microsoft.AspNetCore.Authentication.OpenIdConnect/OpenIdConnectOptions.cs

@@ -241,5 +241,12 @@ public OpenIdConnectOptions(string authenticationScheme)
         /// This is disabled by default.
         /// </summary>
         public bool SkipUnrecognizedRequests { get; set; } = false;
+
+        /// <summary>
+        /// Indicates whether telemetry should be disabled. When this feature is enabled,
+        /// the assembly version of the Microsoft IdentityModel packages is sent to the
+        /// remote OpenID Connect provider as an authorization/logout request parameter.
+        /// </summary>
+        public bool DisableTelemetry { get; set; }
     }
 }

test/Microsoft.AspNetCore.Authentication.Test/OpenIdConnect/OpenIdConnectChallengeTests.cs

@@ -35,7 +35,23 @@ public async Task ChallengeIsIssuedCorrectly()
                 OpenIdConnectParameterNames.ResponseType,
                 OpenIdConnectParameterNames.ResponseMode,
                 OpenIdConnectParameterNames.Scope,
-                OpenIdConnectParameterNames.RedirectUri);
+                OpenIdConnectParameterNames.RedirectUri,
+                OpenIdConnectParameterNames.SkuTelemetry,
+                OpenIdConnectParameterNames.VersionTelemetry);
+        }
+
+        [Fact]
+        public async Task AuthorizationRequestDoesNotIncludeTelemetryParametersWhenDisabled()
+        {
+            var settings = new TestSettings(opt => opt.DisableTelemetry = true);
+
+            var server = settings.CreateTestServer();
+            var transaction = await server.SendAsync(ChallengeEndpoint);
+
+            var res = transaction.Response;
+            Assert.Equal(HttpStatusCode.Redirect, res.StatusCode);
+            Assert.DoesNotContain(OpenIdConnectParameterNames.SkuTelemetry, res.Headers.Location.Query);
+            Assert.DoesNotContain(OpenIdConnectParameterNames.VersionTelemetry, res.Headers.Location.Query);
         }
 
         /*
@@ -58,7 +74,7 @@ Example of a form post
         </body>
         */
         [Fact]
-        public async Task ChallengeIssueedCorrectlyForFormPost()
+        public async Task ChallengeIssuedCorrectlyForFormPost()
         {
             var settings = new TestSettings(
                 opt => opt.AuthenticationMethod = OpenIdConnectRedirectBehavior.FormPost);

test/Microsoft.AspNetCore.Authentication.Test/OpenIdConnect/OpenIdConnectMiddlewareTests.cs

@@ -46,7 +46,25 @@ public async Task SignOutSettingMessage()
             Assert.Equal(HttpStatusCode.Redirect, res.StatusCode);
             Assert.NotNull(res.Headers.Location);
 
-            setting.ValidateSignoutRedirect(transaction.Response.Headers.Location);
+            setting.ValidateSignoutRedirect(
+                transaction.Response.Headers.Location,
+                OpenIdConnectParameterNames.SkuTelemetry,
+                OpenIdConnectParameterNames.VersionTelemetry);
+        }
+
+        [Fact]
+        public async Task EndSessionRequestDoesNotIncludeTelemetryParametersWhenDisabled()
+        {
+            var setting = new TestSettings(opt => opt.DisableTelemetry = true);
+
+            var server = setting.CreateTestServer();
+
+            var transaction = await server.SendAsync(DefaultHost + TestServerBuilder.Signout);
+            var res = transaction.Response;
+
+            Assert.Equal(HttpStatusCode.Redirect, res.StatusCode);
+            Assert.DoesNotContain(OpenIdConnectParameterNames.SkuTelemetry, res.Headers.Location.Query);
+            Assert.DoesNotContain(OpenIdConnectParameterNames.VersionTelemetry, res.Headers.Location.Query);
         }
 
         [Fact]

test/Microsoft.AspNetCore.Authentication.Test/OpenIdConnect/TestSettings.cs

@@ -5,6 +5,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Text.Encodings.Web;
 using System.Xml.Linq;
@@ -152,6 +153,12 @@ private void ValidateParameters(
                     case OpenIdConnectParameterNames.State:
                         ValidateState(actualValues, errors, htmlEncoded);
                         break;
+                    case OpenIdConnectParameterNames.SkuTelemetry:
+                        ValidateSkuTelemetry(actualValues, errors, htmlEncoded);
+                        break;
+                    case OpenIdConnectParameterNames.VersionTelemetry:
+                        ValidateVersionTelemetry(actualValues, errors, htmlEncoded);
+                        break;
                     default:
                         throw new InvalidOperationException($"Unknown parameter \"{paramToValidate}\".");
                 }
@@ -201,6 +208,13 @@ private void ValidateResource(IDictionary<string, string> actualQuery, ICollecti
         private void ValidateState(IDictionary<string, string> actualQuery, ICollection<string> errors, bool htmlEncoded) =>
             ValidateQueryParameter(OpenIdConnectParameterNames.State, ExpectedState, actualQuery, errors, htmlEncoded);
 
+        private void ValidateSkuTelemetry(IDictionary<string, string> actualQuery, ICollection<string> errors, bool htmlEncoded) =>
+            ValidateQueryParameter(OpenIdConnectParameterNames.SkuTelemetry, "ID_NET", actualQuery, errors, htmlEncoded);
+
+        private void ValidateVersionTelemetry(IDictionary<string, string> actualQuery, ICollection<string> errors, bool htmlEncoded) =>
+            ValidateQueryParameter(OpenIdConnectParameterNames.VersionTelemetry,
+                typeof(OpenIdConnectMessage).GetTypeInfo().Assembly.GetName().Version.ToString(), actualQuery, errors, htmlEncoded);
+
         private void ValidateQueryParameter(
             string parameterName,
             string expectedValue,