User Entity

User entity represents a user of the application. It should be derived from AbpUser class as shown below:

public class User : AbpUser<Tenant, User>
{
    //add your own user properties here
}

This class is created when you install module-zero. Users are stored in AbpUsers table in the database. You can add your custom properties to User class (and create database migrations for the changes).

AbpUser class defines some base properties. Some of the properties are:

• UserName: Login name of the user Should be unique for a tenant.
• EmailAddress: Email address of the user. Should be unique for a tenant.
• Password: Hashed password of the user.
• IsActive: True, if this user can login to the application.
• Name and Surname of the user.

There are also some properties like Roles, Permissions, Tenant, Settings, IsEmailConfirmed and so on. Check AbpUser class for more information.

AbpUser class is inherited from FullAuditedEntity. That means it has creation, modification and deletion audit properties. It's also Soft-Delete . So, when we delete a user, it's not deleted from database, just marked as deleted.

AbpUser class implements IMayHaveTenant filter to properly work in a multi-tenant application.

Finally, Id of the User is defined as long.

User Manager

UserManager is a service to perform domain logic for users:

public class UserManager : AbpUserManager<Tenant, Role, User>
{
    //...
}

You can inject and use UserManager to create, delete, update users, grant permissions, change roles for users and much more. You can add your own methods here. Also, you can override any method of AbpUserManager base class for your own needs.

Multi Tenancy

If you're not creating a multi-tenant application, you can skip this section. See multi-tenancy documentation for more information about multi-tenancy.

UserManager is designed to work for a single tenant in a time. It works for the current tenant as default. Let's see some usages of the UserManager:

public class MyTestAppService : ApplicationService
{
    private readonly UserManager _userManager;

    public MyTestAppService(UserManager userManager)
    {
        _userManager = userManager;
    }

    public void TestMethod_1()
    {
        //Find a user by email for current tenant
        var user = _userManager.FindByEmail("[email protected]");
    }

    public void TestMethod_2()
    {
        //Switch to tenant 42
        CurrentUnitOfWork.SetFilterParameter(AbpDataFilters.MayHaveTenant, AbpDataFilters.Parameters.TenantId, 42);

        //Find a user by email for the tenant 42
        var user = _userManager.FindByEmail("[email protected]");
    }

    public void TestMethod_3()
    {
        //Disabling MayHaveTenant filter, so we can reach to all users
        using (CurrentUnitOfWork.DisableFilter(AbpDataFilters.MayHaveTenant))
        {
            //Now, we can search for a user name in all tenants
            var users = _userManager.Users.Where(u => u.UserName == "sampleuser").ToList();

            //Or we can add TenantId filter if we want to search for a specific tenant
            var user = _userManager.Users.FirstOrDefault(u => u.TenantId == 42 && u.UserName == "sampleuser");
        }
    }
}

User Login

Module-zero defines LoginManager which has a LoginAsync method used to login to the application. It checks all logic for login and returns a login result. LoginAsync method also automatically saves all login attempts to the database (even it's a failed attempt). You can use UserLoginAttempt entity to query it.

About IdentityResults

Some methods of UserManager return IdentityResult as a result instead of throwing exceptions for some cases. This is nature of ASP.NET Identity Framework. Module-zero also follows it. So, we should check this returning result object to know if operation succeeded.

Module-zero defines CheckErrors extension method that automatically checks errors and throws exception (a localized UserFriendlyException) if needed. Example usage:

(await UserManager.CreateAsync(user)).CheckErrors();

To get localized exceptions, we should provide a ILocalizationManager instance:

(await UserManager.CreateAsync(user)).CheckErrors(LocalizationManager);

External Authentication

Login method of module-zero authenticate a user from the AbpUsers table in the database. Some applications may require to authenticate users from some external sources (like active directory, from another database's tables or even from a remote service).

For such cases, UserManager defines an extension point named 'external authentication source'. We can create a class derived from IExternalAuthenticationSource and register to the configuration. There is DefaultExternalAuthenticationSource class to simplify implementation of IExternalAuthenticationSource. Let's see an example:

public class MyExternalAuthSource : DefaultExternalAuthenticationSource<Tenant, User>
{
    public override string Name
    {
        get { return "MyCustomSource"; }
    }

    public override Task<bool> TryAuthenticateAsync(string userNameOrEmailAddress, string plainPassword, Tenant tenant)
    {
        //TODO: authenticate user and return true or false
    }
}

In TryAuthenticateAsync method, we can check user name and password from some source and return true if given user is authenticated by this source. Also, we can override CreateUser and UpdateUser methods to control user creation and updating for this source.

When a user authenticated by an external source, module-zero checks if this user does exists in the database (AbpUsers table). If not, it calls CreateUser to create the user, otherwise it calls UpdateUser to allow authentication source to update existing user informations.

We can define more than one external authentication source in an application. AbpUser entity has an AuthenticationSource property that shows which source authenticated this user.

To register our authenciation source, we can use such a code in PreInitialize of our module:

Configuration.Modules.Zero().UserManagement.ExternalAuthenticationSources.Add<MyExternalAuthSource>();

LDAP/Active Directory

LdapAuthenticationSource is an implementation of external authentication to make users login with their LDAP (active directory) user name and password.

If we want to use LDAP authentication, we first add Abp.Zero.Ldap nuget package to our project (generally to Core (domain) project). Then we should extend LdapAuthenticationSource for our application as shown below:

public class MyLdapAuthenticationSource : LdapAuthenticationSource<Tenant, User>
{
    public MyLdapAuthenticationSource(ILdapSettings settings, IAbpZeroLdapModuleConfig ldapModuleConfig)
        : base(settings, ldapModuleConfig)
    {
    }
}

Lastly, we should set a module dependency to AbpZeroLdapModule and enable LDAP with the auth source created above:

[DependsOn(typeof(AbpZeroLdapModule))]
public class MyApplicationCoreModule : AbpModule
{
    public override void PreInitialize()
    {
        Configuration.Modules.ZeroLdap().Enable(typeof (MyLdapAuthenticationSource));    
    }

    ...
}

After these steps, LDAP module will be enabled for your application. But LDAP auth is not enabled by default. We can enable it using settings.

Settings

LdapSettingNames class defines constants for setting names. You can use these constant names while changing settings (or getting settings). LDAP settings are per tenant (for multi-tenant applications). So, different tenants have different settings (see setting definitions on github). 

As you can see in the MyLdapAuthenticationSource constructor, LdapAuthenticationSource expects ILdapSettings as a constructor argument. This interface is used to get LDAP settings like domain, user name and password to connect to Active Directory. Default implementation (LdapSettings class) gets these settings from the setting manager.

If you work with Setting manager, then no problem. You can change LDAP settings using setting manager API. If you want, you can add an initial/seed data to database to enable LDAP auth by default.

Note: If you don't define domain, username and password, LDAP authentication works for current domain if your application runs in a domain with appropriate privileges.

Custom Settings

If you want to define another setting source, you can implement a custom ILdapSettings class as shown below:

public class MyLdapSettings : ILdapSettings
{
    public async Task<bool> GetIsEnabled(int? tenantId)
    {
        return true;
    }

    public async Task<ContextType> GetContextType(int? tenantId)
    {
        return ContextType.Domain;
    }

    public async Task<string> GetContainer(int? tenantId)
    {
        return null;
    }

    public async Task<string> GetDomain(int? tenantId)
    {
        return null;
    }

    public async Task<string> GetUserName(int? tenantId)
    {
        return null;
    }

    public async Task<string> GetPassword(int? tenantId)
    {
        return null;
    }
}

And register it to IOC in PreInitialize of your module:

[DependsOn(typeof(AbpZeroLdapModule))]
public class MyApplicationCoreModule : AbpModule
{
    public override void PreInitialize()
    {
        IocManager.Register<ILdapSettings, MyLdapSettings>(); //change default setting source
        Configuration.Modules.ZeroLdap().Enable(typeof (MyLdapAuthenticationSource));
    }

    ...
}

Then you can get LDAP settings from any other source.

Social Logins

See startup template document for social logins.