Tenant impersonation & User impersonation

User impersonation allows you to temporarily sign in as a different user in your tenant's users. This article introduces how to enable impersonation in ABP Framework. Impersonation is enabled by defautl in ABP v5.0 and above.

Introduction

In some cases, users need to sign in as another user and perform operations on behalf of the target user without sharing the target user's password.

How to enable impersonation feature?

If you your ABP version is lower than 5.0, you can implement the impersonation feature by following the steps below.

MVC

public override void ConfigureServices(ServiceConfigurationContext context)
{
    var configuration = context.Services.GetConfiguration();

    //For impersonation in Saas module
    context.Services.Configure<AbpSaasHostWebOptions>(options =>
    {
        options.EnableTenantImpersonation = true;
    });

    //For impersonation in Identity module
    context.Services.Configure<AbpIdentityWebOptions>(options =>
    {
        options.EnableUserImpersonation = true;
    });

    context.Services.Configure<AbpAccountOptions>(options =>
    {
        //For impersonation in Saas module
        options.TenantAdminUserName = "admin";
        options.ImpersonationTenantPermission = SaasHostPermissions.Tenants.Impersonation;

        //For impersonation in Identity module
        options.ImpersonationUserPermission = IdentityPermissions.Users.Impersonation;
    });
}

MVC Tiered

IdentityServer

1. Depends AbpAccountPublicWebImpersonationModule(Volo.Abp.Account.Pro.Public.Web.Impersonation) and SaasHostApplicationContractsModule on your IdentityServerModule
2. Configure the AbpAccountOptions, then add JwtBearer authentication and UseJwtTokenMiddleware to the ASP.NET Core pipeline

public override void ConfigureServices(ServiceConfigurationContext context)
{
    context.Services.Configure<AbpAccountOptions>(options =>
    {
        //For impersonation in Saas module
        options.TenantAdminUserName = "admin";
        options.ImpersonationTenantPermission = SaasHostPermissions.Tenants.Impersonation;

        //For impersonation in Identity module
        options.ImpersonationUserPermission = IdentityPermissions.Users.Impersonation;
    });

    context.Services.AddAuthentication()
        .AddJwtBearer(options =>
        {
            options.Authority = configuration["AuthServer:Authority"];
            options.RequireHttpsMetadata = Convert.ToBoolean(configuration["AuthServer:RequireHttpsMetadata"]);
            options.Audience = "MyProjectName";
        });
}

public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
    var app = context.GetApplicationBuilder();
    app.UseAuthentication();

    //Add this line after `UseAuthentication`
    app.UseJwtTokenMiddleware();
}

HttpApi.Host

No need to do anything here.

Web

1. Depends AbpAccountPublicWebImpersonationModule(Volo.Abp.Account.Pro.Public.Web.Impersonation) on your WebModule

2. Chnage the base class of AccountController to AbpAccountImpersonationChallengeAccountController

public class AccountController : AbpAccountImpersonationChallengeAccountController
{

}

3. Add ImpersonationViewComponent to \Components\Toolbar\Impersonation folder

public class ImpersonationViewComponent : AbpViewComponent
{
    public virtual IViewComponentResult Invoke()
    {
        return View("~/Components/Toolbar/Impersonation/Default.cshtml");
    }
}

@using Microsoft.AspNetCore.Mvc.Localization
@using Volo.Abp.Account.Localization
@inject IHtmlLocalizer<AccountResource> L
<form method="post" data-ajaxForm="false" action="~/Account/BackToImpersonator">
    @Html.AntiForgeryToken()
    <button type="submit" class="btn text-danger" data-bs-toggle="tooltip" data-bs-placement="left" title="@L["BackToImpersonator"]">
        <i class="fa fa-undo"></i>
    </button>
</form>

4. Add ImpersonationViewComponent to ToolbarContributor.

if (context.ServiceProvider.GetRequiredService<ICurrentUser>().FindImpersonatorUserId() != null)
{
    context.Toolbar.Items.Add(new ToolbarItem(typeof(ImpersonationViewComponent), order: -1));
}

5. Configure AbpSaasHostWebOptions and AbpIdentityWebOptions

public override void ConfigureServices(ServiceConfigurationContext context)
{
    var configuration = context.Services.GetConfiguration();

    //For impersonation in Saas module
    context.Services.Configure<AbpSaasHostWebOptions>(options =>
    {
        options.EnableTenantImpersonation = true;
    });

    //For impersonation in Identity module
    context.Services.Configure<AbpIdentityWebOptions>(options =>
    {
        options.EnableUserImpersonation = true;
    });
}

Blazor Server

1. Depends AbpAccountPublicWebImpersonationModule(Volo.Abp.Account.Pro.Public.Web.Impersonation) and AbpAccountPublicBlazorServerModule(Volo.Abp.Account.Pro.Public.Blazor.Server) on your BlazorModule

2. Configure SaasHostBlazorOptions and AbpAccountOptions

public override void ConfigureServices(ServiceConfigurationContext context)
{
    var configuration = context.Services.GetConfiguration();

    //For impersonation in Saas module
    context.Services.Configure<SaasHostBlazorOptions>(options =>
    {
        options.EnableTenantImpersonation = true;
    });

    //For impersonation in Identity module
    context.Services.Configure<AbpIdentityProBlazorOptions>(options =>
    {
        options.EnableUserImpersonation = true;
    });

    context.Services.Configure<AbpAccountOptions>(options =>
    {
        //For impersonation in Saas module
        options.TenantAdminUserName = "admin";
        options.ImpersonationTenantPermission = SaasHostPermissions.Tenants.Impersonation;

        //For impersonation in Identity module
        options.ImpersonationUserPermission = IdentityPermissions.Users.Impersonation;
    });
}

Blazor Server Tiered

Identity Server

1. Depends AbpAccountPublicWebImpersonationModule(Volo.Abp.Account.Pro.Public.Web.Impersonation) and SaasHostApplicationContractsModule on your IdentityServerModule
2. Configure the AbpAccountOptions, then add JwtBearer authentication and UseJwtTokenMiddleware to the ASP.NET Core pipeline

public override void ConfigureServices(ServiceConfigurationContext context)
{
    context.Services.Configure<AbpAccountOptions>(options =>
    {
        //For impersonation in Saas module
        options.TenantAdminUserName = "admin";
        options.ImpersonationTenantPermission = SaasHostPermissions.Tenants.Impersonation;

        //For impersonation in Identity module
        options.ImpersonationUserPermission = IdentityPermissions.Users.Impersonation;
    });

    context.Services.AddAuthentication()
        .AddJwtBearer(options =>
        {
            options.Authority = configuration["AuthServer:Authority"];
            options.RequireHttpsMetadata = Convert.ToBoolean(configuration["AuthServer:RequireHttpsMetadata"]);
            options.Audience = "MyProjectName";
        });
}

public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
    var app = context.GetApplicationBuilder();
    app.UseAuthentication();

    //Add this line after `UseAuthentication`
    app.UseJwtTokenMiddleware();
}

HttpApi.Host

No need to do anything here.

Blazor

1. Depends AbpAccountPublicWebImpersonationModule(Volo.Abp.Account.Pro.Public.Web.Impersonation) and AbpAccountPublicBlazorServerModule(Volo.Abp.Account.Pro.Public.Blazor.Server) on your BlazorModule

2. Chnage the base class of AccountController to AbpAccountImpersonationChallengeAccountController

public class AccountController : AbpAccountImpersonationChallengeAccountController
{

}

3. Configure SaasHostBlazorOptions and AbpAccountOptions

public override void ConfigureServices(ServiceConfigurationContext context)
{
    //For impersonation in Saas module
    context.Services.Configure<SaasHostBlazorOptions>(options =>
    {
        options.EnableTenantImpersonation = true;
    });

    //For impersonation in Identity module
    context.Services.Configure<AbpIdentityProBlazorOptions>(options =>
    {
        options.EnableUserImpersonation = true;
    });
}

Angular

Add Impersonation to the Angular grant types.

//Console Test / Angular Client
var consoleAndAngularClientId = configurationSection["MyProjectName_App:ClientId"];
if (!consoleAndAngularClientId.IsNullOrWhiteSpace())
{
    var webClientRootUrl = configurationSection["MyProjectName_App:RootUrl"]?.TrimEnd('/');

    await CreateClientAsync(
        name: consoleAndAngularClientId,
        scopes: commonScopes,
        grantTypes: new[] { "password", "client_credentials", "authorization_code", "LinkLogin", "Impersonation" },
        secret: (configurationSection["MyProjectName_App:ClientSecret"] ?? "1q2w3e*").Sha256(),
        requireClientSecret: false,
        redirectUri: webClientRootUrl,
        postLogoutRedirectUri: webClientRootUrl,
        corsOrigins: new[] { webClientRootUrl.RemovePostFix("/") }
    );
}

Blazor WASM

It is currently not supported.

Tenant & User Impersonation permissions