Guardrex/signout callback path

aspnetcore/blazor/security/blazor-web-app-with-entra.md

@@ -95,6 +95,25 @@ Example:
 
 The callback path (`CallbackPath`) must match the redirect URI (login callback path) configured when registering the application in the Entra or Azure portal. Paths are configured in the **Authentication** blade of the app's registration. The default value of `CallbackPath` is `/signin-oidc` for a registered redirect URI of `https://localhost/signin-oidc` (a port isn't required).
 
+The <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.SignedOutCallbackPath%2A> (configuration key: "`SignedOutCallbackPath`") is the request path within the app's base path intercepted by the OpenID Connect handler where the user agent is first returned after signing out from Entra. The sample app doesn't set a value for the path because the default value of "`/signout-callback-oidc`" is used. After intercepting the request, the OpenID Connect handler finally redirects to the <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.SignedOutRedirectUri%2A> or <xref:Microsoft.AspNetCore.Authentication.AuthenticationProperties.RedirectUri%2A>, if specified.
+
+Configure the signed-out callback path in the app's Entra registration. In the Entra or Azure portal, set the path in the **Web** platform configuration's **Redirect URI** entries:
+
+> :::no-loc text="https://localhost/signout-callback-oidc":::
+
+> [!NOTE]
+> A port isn't required for `localhost` addresses when using Entra.
+
+If you don't add the signed-out callback path URI to the app's registration in Entra, Entra refuses to redirect the user back to the app and merely asks them to close their browser window.
+
+<!-- UPDATE 10.0 Keep an eye on this NOTE for removal or updates.
+                 The remark on this subject is in the Program files of the
+                 OIDC sample app (Blazor samples repo), and OIDC-BFF sample 
+                 app (Blazor samples repo). -->
+
+> [!NOTE]
+> Entra currently only redirects back to the <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A> if the `microsoftonline.com` Authority (`https://login.microsoftonline.com/{TENANT ID}/v2.0/`) is used. This limitation doesn't exist if you can use the "common" Authority with Microsoft Identity Web. For more information, see [postLogoutRedirectUri not working when authority url contains a tenant ID (`AzureAD/microsoft-authentication-library-for-js` #5783)](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/5783).
+
 [!INCLUDE[](~/blazor/security/includes/secure-authentication-flows.md)]
 
 ### Establish the client secret

aspnetcore/blazor/security/blazor-web-app-with-oidc.md

@@ -27,6 +27,8 @@ The following specification is covered:
 * Automatic non-interactive token refresh.
 * Securely calls a (web) API in the server project for data.
 
+For an alternative experience using [Microsoft Authentication Library for .NET](/entra/msal/dotnet/), [Microsoft Identity Web](/entra/msal/dotnet/microsoft-identity-web/), and [Microsoft Entra ID](https://www.microsoft.com/security/business/identity-access/microsoft-entra-id), see <xref:blazor/security/blazor-web-app-entra>.
+
 ## Sample app
 
 The sample app consists of two projects:
@@ -130,14 +132,15 @@ The following <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConn
   oidcOptions.Authority = "https://login.microsoftonline.com/common/v2.0/";
   ```
 
-* <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.ResponseType%2A>: Configures the OIDC handler to only perform authorization code flow. Implicit grants and hybrid flows are unnecessary in this mode.
-
-  In the Entra or Azure portal's **Implicit grant and hybrid flows** app registration configuration, do **not** select either checkbox for the authorization endpoint to return **Access tokens** or **ID tokens**. The OIDC handler automatically requests the appropriate tokens using the code returned from the authorization endpoint.
+* <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.ResponseType%2A>: Configures the OIDC handler to only perform authorization code flow. Implicit grants and hybrid flows are unnecessary in this mode. The OIDC handler automatically requests the appropriate tokens using the code returned from the authorization endpoint.
 
   ```csharp
   oidcOptions.ResponseType = OpenIdConnectResponseType.Code;
   ```
 
+  > [!NOTE]
+  > In the Entra or Azure portal's **Implicit grant and hybrid flows** app registration configuration, do **not** select either checkbox for the authorization endpoint to return **Access tokens** or **ID tokens**.
+
 * <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.MapInboundClaims%2A> and configuration of <xref:Microsoft.IdentityModel.Tokens.TokenValidationParameters.NameClaimType%2A> and <xref:Microsoft.IdentityModel.Tokens.TokenValidationParameters.RoleClaimType%2A>: Many OIDC servers use "`name`" and "`role`" rather than the SOAP/WS-Fed defaults in <xref:System.Security.Claims.ClaimTypes>. When <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.MapInboundClaims%2A> is set to `false`, the handler doesn't perform claims mappings, and the claim names from the JWT are used directly by the app. The following example sets the role claim type to "`roles`," which is appropriate for [Microsoft Entra ID (ME-ID)](https://www.microsoft.com/security/business/microsoft-entra). Consult your identity provider's documentation for more information.
 
   > [!NOTE]
@@ -153,33 +156,30 @@ The following <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConn
 
   * <xref:Microsoft.AspNetCore.Builder.RemoteAuthenticationOptions.CallbackPath>: The request path within the app's base path where the user-agent is returned.
 
-    In the Entra or Azure portal, set the path in the **Web** platform configuration's **Redirect URI**:
+    Configure the signed-out callback path in the app's OIDC provider registration. In the following example, the `{PORT}` placeholder is the app's port:
 
-    > :::no-loc text="https://localhost/signin-oidc":::
+    > :::no-loc text="https://localhost:{PORT}/signin-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses when using Microsoft Entra ID. Most other OIDC providers require a correct port.
+    > A port isn't required for `localhost` addresses when using Microsoft Entra ID. Most other OIDC providers require the correct port.
 
-  * <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A>: The request path within the app's base path where the user agent is returned after sign out from the identity provider.
+  * <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.SignedOutCallbackPath%2A> (configuration key: "`SignedOutCallbackPath`"): The request path within the app's base path intercepted by the OIDC handler where the user agent is first returned after signing out from Entra. The sample app doesn't set a value for the path because the default value of "`/signout-callback-oidc`" is used. After intercepting the request, the OIDC handler finally redirects to the <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.SignedOutRedirectUri%2A> or <xref:Microsoft.AspNetCore.Authentication.AuthenticationProperties.RedirectUri%2A>, if specified.
 
-    In the Entra or Azure portal, set the path in the **Web** platform configuration's **Redirect URI**:
+    Configure the signed-out callback path in the app's OIDC provider registration. In the following example, the `{PORT}` placeholder is the app's port:
 
-    > :::no-loc text="https://localhost/signout-callback-oidc":::
+    > :::no-loc text="https://localhost:{PORT}/signout-callback-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses when using Microsoft Entra ID. Most other OIDC providers require a correct port.
-
-    > [!NOTE]
-    > If using Microsoft Identity Web, the provider currently only redirects back to the <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A> if the `microsoftonline.com` Authority (`https://login.microsoftonline.com/{TENANT ID}/v2.0/`) is used. This limitation doesn't exist if you can use the "common" Authority with Microsoft Identity Web. For more information, see [postLogoutRedirectUri not working when authority url contains a tenant ID (`AzureAD/microsoft-authentication-library-for-js` #5783)](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/5783).
+    > When using Microsoft Entra ID, set the path in the **Web** platform configuration's **Redirect URI** entries in the Entra or Azure portal. A port isn't required for `localhost` addresses when using Entra. Most other OIDC providers require the correct port. If you don't add the signed-out callback path URI to the app's registration in Entra, Entra refuses to redirect the user back to the app and merely asks them to close their browser window.
 
   * <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.RemoteSignOutPath%2A>: Requests received on this path cause the handler to invoke sign-out using the sign-out scheme.
 
-    In the Entra or Azure portal, set the **Front-channel logout URL**:
+    In the following example, the `{PORT}` placeholder is the app's port:
 
     > :::no-loc text="https://localhost/signout-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses when using Microsoft Entra ID. Most other OIDC providers require a correct port.
+    > When using Microsoft Entra ID, set the **Front-channel logout URL** in the Entra or Azure portal. A port isn't required for `localhost` addresses when using Entra. Most other OIDC providers require the correct port.
 
     ```csharp
     oidcOptions.CallbackPath = new PathString("{PATH}");
@@ -367,12 +367,15 @@ The following <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConn
   oidcOptions.Scope.Add(OpenIdConnectScope.OfflineAccess);
   ```
 
-* Scopes for obtaining weather data from the web API (<xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.Scope%2A>): The `Weather.Get` scope is configured in the Azure or Entra portal under **Expose an API**. This is necessary for backend web API project (`MinimalApiJwt`) to validate the access token with bearer JWT.
+* Scopes for obtaining weather data from the web API (<xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.Scope%2A>): This is necessary for backend web API project (`MinimalApiJwt`) to validate the access token with bearer JWT.
 
   ```csharp
   oidcOptions.Scope.Add("{APP ID URI}/{API NAME}");
   ```
 
+  > [!NOTE]
+  > When using Microsoft Entra ID, the `Weather.Get` scope is configured in the Azure or Entra portal under **Expose an API**.
+
   Example:
 
   * App ID URI (`{APP ID URI}`): `https://{DIRECTORY NAME}.onmicrosoft.com/{CLIENT ID}`
@@ -420,14 +423,15 @@ The following <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConn
   oidcOptions.Authority = "https://login.microsoftonline.com/common/v2.0/";
   ```
 
-* <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.ResponseType%2A>: Configures the OIDC handler to only perform authorization code flow. Implicit grants and hybrid flows are unnecessary in this mode.
-
-  In the Entra or Azure portal's **Implicit grant and hybrid flows** app registration configuration, do **not** select either checkbox for the authorization endpoint to return **Access tokens** or **ID tokens**. The OIDC handler automatically requests the appropriate tokens using the code returned from the authorization endpoint.
+* <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.ResponseType%2A>: Configures the OIDC handler to only perform authorization code flow. Implicit grants and hybrid flows are unnecessary in this mode. The OIDC handler automatically requests the appropriate tokens using the code returned from the authorization endpoint.
 
   ```csharp
   oidcOptions.ResponseType = OpenIdConnectResponseType.Code;
   ```
 
+  > [!NOTE]
+  > When using Microsoft Entra ID, do **not** select either checkbox for the authorization endpoint to return **Access tokens** or **ID tokens** in **Implicit grant and hybrid flows** app registration configuration.
+
 * <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.MapInboundClaims%2A> and configuration of <xref:Microsoft.IdentityModel.Tokens.TokenValidationParameters.NameClaimType%2A> and <xref:Microsoft.IdentityModel.Tokens.TokenValidationParameters.RoleClaimType%2A>: Many OIDC servers use "`name`" and "`role`" rather than the SOAP/WS-Fed defaults in <xref:System.Security.Claims.ClaimTypes>. When <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConnectOptions.MapInboundClaims%2A> is set to `false`, the handler doesn't perform claims mappings and the claim names from the JWT are used directly by the app. The following example sets the role claim type to "`roles`," which is appropriate for [Microsoft Entra ID (ME-ID)](https://www.microsoft.com/security/business/microsoft-entra). Consult your identity provider's documentation for more information.
 
   > [!NOTE]
@@ -441,35 +445,30 @@ The following <xref:Microsoft.AspNetCore.Authentication.OpenIdConnect.OpenIdConn
 
 * Path configuration: Paths must match the redirect URI (login callback path) and post logout redirect (signed-out callback path) paths configured when registering the application with the OIDC provider. In the Azure portal, paths are configured in the **Authentication** blade of the app's registration. Both the sign-in and sign-out paths must be registered as redirect URIs. The default values are `/signin-oidc` and `/signout-callback-oidc`.
 
-  * <xref:Microsoft.AspNetCore.Builder.RemoteAuthenticationOptions.CallbackPath>: The request path within the app's base path where the user-agent is returned.
-
-    In the Entra or Azure portal, set the path in the **Web** platform configuration's **Redirect URI**:
+    Configure the signed-out callback path in the app's OIDC provider registration. In the following example, the `{PORT}` placeholder is the app's port:
 
-    > :::no-loc text="https://localhost/signin-oidc":::
+    > :::no-loc text="https://localhost:{PORT}/signin-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses.
+    > A port isn't required for `localhost` addresses when using Microsoft Entra ID. Most other OIDC providers require the correct port.
 
-  * <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A>: The request path within the app's base path where the user agent is returned after sign out from the identity provider.
+  * <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A> (configuration key: "`SignedOutCallbackPath`"): The request path within the app's base path where the user agent is returned after sign out from the OIDC identity provider. Typically, the app's configuration relies on the default value of "`/signout-callback-oidc`".
 
-    In the Entra or Azure portal, set the path in the **Web** platform configuration's **Redirect URI**:
+    Configure the signed-out callback path in the app's OIDC provider registration. In the following example, the `{PORT}` placeholder is the app's port:
 
-    > :::no-loc text="https://localhost/signout-callback-oidc":::
+    > :::no-loc text="https://localhost:{PORT}/signout-callback-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses.
-
-    > [!NOTE]
-    > If using Microsoft Identity Web, the provider currently only redirects back to the <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.SignedOutCallbackPath%2A> if the `microsoftonline.com` Authority (`https://login.microsoftonline.com/{TENANT ID}/v2.0/`) is used. This limitation doesn't exist if you can use the "common" Authority with Microsoft Identity Web. For more information, see [postLogoutRedirectUri not working when authority url contains a tenant ID (`AzureAD/microsoft-authentication-library-for-js` #5783)](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/5783).
+    > When using Microsoft Entra ID, set the path in the **Web** platform configuration's **Redirect URI** entries in the Entra or Azure portal. A port isn't required for `localhost` addresses when using Entra. Most other OIDC providers require the correct port. If you don't add the signed-out callback path URI to the app's registration in Entra, Entra refuses to redirect the user back to the app and merely asks them to close their browser window.
 
   * <xref:Microsoft.AspNetCore.Builder.OpenIdConnectOptions.RemoteSignOutPath%2A>: Requests received on this path cause the handler to invoke sign-out using the sign-out scheme.
 
-    In the Entra or Azure portal, set the **Front-channel logout URL**:
+    In the following example, the `{PORT}` placeholder is the app's port:
 
     > :::no-loc text="https://localhost/signout-oidc":::
 
     > [!NOTE]
-    > A port isn't required for `localhost` addresses.
+    > When using Microsoft Entra ID, set the **Front-channel logout URL** in the Entra or Azure portal. A port isn't required for `localhost` addresses when using Entra. Most other OIDC providers require the correct port.
 
     ```csharp
     oidcOptions.CallbackPath = new PathString("{PATH}");
@@ -548,14 +547,15 @@ The `MinimalApiJwt` project is a backend web API for multiple frontend projects.
 
 Configure the project in the <xref:Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerOptions> of the <xref:Microsoft.Extensions.DependencyInjection.JwtBearerExtensions.AddJwtBearer%2A> call in the project's `Program` file:
 
-* <xref:Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerOptions.Audience%2A>: Sets the Audience for any received OpenID Connect token. 
-
-  In the Azure or Entra portal: Match the value to just the path of the **Application ID URI** configured when adding the `Weather.Get` scope under **Expose an API**:
+* <xref:Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerOptions.Audience%2A>: Sets the Audience for any received OIDC token. 
 
   ```csharp
   jwtOptions.Audience = "{APP ID URI}";
   ```
 
+  > [!NOTE]
+  > When using Microsoft Entra ID, match the value to just the path of the **Application ID URI** configured when adding the `Weather.Get` scope under **Expose an API** in the Azure or Entra portal.
+
   Example:
 
   App ID URI (`{APP ID URI}`): `https://{DIRECTORY NAME}.onmicrosoft.com/{CLIENT ID}`:
@@ -577,7 +577,7 @@ Configure the project in the <xref:Microsoft.AspNetCore.Authentication.JwtBearer
   jwtOptions.Audience = "api://00001111-aaaa-2222-bbbb-3333cccc4444";
   ```
 
-* <xref:Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerOptions.Authority%2A>: Sets the Authority for making OpenID Connect calls. Match the value to the Authority configured for the OIDC handler in `BlazorWebAppOidc/Program.cs`:
+* <xref:Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerOptions.Authority%2A>: Sets the Authority for making OIDC calls. Match the value to the Authority configured for the OIDC handler in `BlazorWebAppOidc/Program.cs`:
 
   ```csharp
   jwtOptions.Authority = "{AUTHORITY}";