Extension Grant Validator

Duende.IdentityServer.Validation.IExtensionGrantValidator

Use an implementation of this interface to handle extension grants.

public interface IExtensionGrantValidator
{
    /// <summary>
    /// Handles the custom grant request.
    /// </summary>
    /// <param name="request">The validation context.</param>
    Task ValidateAsync(ExtensionGrantValidationContext context);

    /// <summary>
    /// Returns the grant type this validator can deal with
    /// </summary>
    /// <value>
    /// The type of the grant.
    /// </value>
    string GrantType { get; }
}

• GrantType

  Specifies the name of the extension grant that the implementation wants to register for.

• ValidateAsync

  This method gets called at runtime, when a request comes in that is using the registered extension grant. The job of this method is to validate the request and to populate ExtensionGrantValidationContext.Result with a grant validation result

The instance of the extension grant validator gets registered with:

Program.cs

builder.AddExtensionGrantValidator<MyValidator>();