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

## ClientValidator Class

Validates the client in a backchannel authentication request, ensuring the client is registered
and authorized to perform the request as part of the authentication validation process\.

```csharp
public class ClientValidator : Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.IBackChannelAuthenticationContextValidator
```

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

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

## ClientValidator\(IClientAuthenticator\) Constructor {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.ClientValidator.ClientValidator(Abblix.Oidc.Server.Features.ClientAuthentication.IClientAuthenticator)}

Validates the client in a backchannel authentication request, ensuring the client is registered
and authorized to perform the request as part of the authentication validation process\.

```csharp
public ClientValidator(Abblix.Oidc.Server.Features.ClientAuthentication.IClientAuthenticator clientAuthenticator);
```
#### Parameters

###### `clientAuthenticator` [IClientAuthenticator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.ClientAuthentication.IClientAuthenticator 'Abblix\.Oidc\.Server\.Features\.ClientAuthentication\.IClientAuthenticator') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.ClientValidator.ClientValidator(Abblix.Oidc.Server.Features.ClientAuthentication.IClientAuthenticator).clientAuthenticator}

The service used to authenticate and retrieve client information\.
### Methods

## ClientValidator\.ValidateAsync\(BackChannelAuthenticationValidationContext\) Method {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.ClientValidator.ValidateAsync(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.BackChannelAuthenticationValidationContext)}

Validates the client in the context of a backchannel authentication request\.
Ensures that the client is recognized and authorized to make the request\.

```csharp
public System.Threading.Tasks.Task<Abblix.Oidc.Server.Common.OidcError?> ValidateAsync(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.BackChannelAuthenticationValidationContext context);
```
#### Parameters

###### `context` [BackChannelAuthenticationValidationContext](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.BackChannelAuthenticationValidationContext 'Abblix\.Oidc\.Server\.Endpoints\.BackChannelAuthentication\.Validation\.BackChannelAuthenticationValidationContext') {#Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.ClientValidator.ValidateAsync(Abblix.Oidc.Server.Endpoints.BackChannelAuthentication.Validation.BackChannelAuthenticationValidationContext).context}

The validation context containing the backchannel authentication request and client information\.

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

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[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/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
A [OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError') if the client is not valid,
or null if the client is authorized\.