#### [Abblix\.Oidc\.Server](https://www.abblix.com/en/docs/api/abblix-oidc-server 'index')
### [Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication')

## BackChannelAuthenticationHandler Class

Default [IBackChannelAuthenticationHandler](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationHandler') implementation that drives the CIBA endpoint
pipeline as fetch \(request object resolution\) \-\> validation \-\> processing, short\-circuiting on the
first error so that subsequent stages never see invalid input\.

```csharp
public class BackChannelAuthenticationHandler : Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler
```

Inheritance [System\.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object 'System\.Object') → BackChannelAuthenticationHandler

Implements [IBackChannelAuthenticationHandler](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationHandler')
### Constructors

## BackChannelAuthenticationHandler\(IBackChannelAuthenticationRequestFetcher, IBackChannelAuthenticationRequestValidator, IBackChannelAuthenticationRequestProcessor\) Constructor {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.BackChannelAuthenticationHandler(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor)}

Default [IBackChannelAuthenticationHandler](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationHandler') implementation that drives the CIBA endpoint
pipeline as fetch \(request object resolution\) \-\> validation \-\> processing, short\-circuiting on the
first error so that subsequent stages never see invalid input\.

```csharp
public BackChannelAuthenticationHandler(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher fetcher, Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator validator, Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor processor);
```
#### Parameters

###### `fetcher` [IBackChannelAuthenticationRequestFetcher](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.RequestFetching\.IBackChannelAuthenticationRequestFetcher') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.BackChannelAuthenticationHandler(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor).fetcher}

Resolves the effective request, in particular substituting parameters carried in
            a signed Request Object per CIBA Core 1\.0 §7\.1\.1\.

###### `validator` [IBackChannelAuthenticationRequestValidator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationRequestValidator') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.BackChannelAuthenticationHandler(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor).validator}

Validates the resolved request against client metadata and protocol rules\.

###### `processor` [IBackChannelAuthenticationRequestProcessor](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationRequestProcessor') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.BackChannelAuthenticationHandler(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.RequestFetching.IBackChannelAuthenticationRequestFetcher,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestValidator,Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationRequestProcessor).processor}

Persists the authentication request and produces the
            `auth_req_id`/`expires_in`/`interval` response\.
### Methods

## BackChannelAuthenticationHandler\.HandleAsync\(BackChannelAuthenticationRequest, ClientRequest\) Method {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.HandleAsync(Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Model.ClientRequest)}

Runs the fetch\-validate\-process pipeline for a CIBA request and returns the resulting success
payload or an [OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError') from the first failing stage\.

```csharp
public System.Threading.Tasks.Task<Abblix.Utils.Result<Abblix.Oidc.Server.Model.BackChannelAuthenticationSuccess,Abblix.Oidc.Server.Common.OidcError>> HandleAsync(Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest request, Abblix.Oidc.Server.Model.ClientRequest clientRequest);
```
#### Parameters

###### `request` [BackChannelAuthenticationRequest](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest 'Abblix\.Oidc\.Server\.Model\.BackChannelAuthenticationRequest') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.HandleAsync(Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Model.ClientRequest).request}

The parsed CIBA authentication request as received on the wire\.

###### `clientRequest` [ClientRequest](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Model.ClientRequest 'Abblix\.Oidc\.Server\.Model\.ClientRequest') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.BackChannelAuthenticationHandler.HandleAsync(Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Model.ClientRequest).clientRequest}

Transport metadata used for client authentication and validation\.

Implements [HandleAsync\(BackChannelAuthenticationRequest, ClientRequest\)](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Interfaces.IBackChannelAuthenticationHandler.HandleAsync(Abblix.Oidc.Server.Model.BackChannelAuthenticationRequest,Abblix.Oidc.Server.Model.ClientRequest) 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Interfaces\.IBackChannelAuthenticationHandler\.HandleAsync\(Abblix\.Oidc\.Server\.Model\.BackChannelAuthenticationRequest, Abblix\.Oidc\.Server\.Model\.ClientRequest\)')

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[Abblix\.Utils\.Result&lt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[BackChannelAuthenticationSuccess](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Model.BackChannelAuthenticationSuccess 'Abblix\.Oidc\.Server\.Model\.BackChannelAuthenticationSuccess')[,](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')