private async Task <TokenRequestValidationResult> ValidateDeviceCodeRequestAsync(NameValueCollection parameters)
{
_logger.LogDebug("Start validation of device code request");
/////////////////////////////////////////////
// check if client is authorized for grant type
/////////////////////////////////////////////
if (!_validatedRequest.Client.AllowedGrantTypes.ToList().Contains(GrantType.DeviceFlow))
{
LogError("Client not authorized for device flow");
return(Invalid(OidcConstants.TokenErrors.UnauthorizedClient));
}
/////////////////////////////////////////////
// validate device code parameter
/////////////////////////////////////////////
var deviceCode = parameters.Get(OidcConstants.TokenRequest.DeviceCode);
if (deviceCode.IsMissing())
{
LogError("Device code is missing");
return(Invalid(OidcConstants.TokenErrors.InvalidRequest));
}
if (deviceCode.Length > _options.InputLengthRestrictions.DeviceCode)
{
LogError("Device code too long");
return(Invalid(OidcConstants.TokenErrors.InvalidGrant));
}
/////////////////////////////////////////////
// validate device code
/////////////////////////////////////////////
var deviceCodeContext = new DeviceCodeValidationContext {
DeviceCode = deviceCode, Request = _validatedRequest
};
await _deviceCodeValidator.ValidateAsync(deviceCodeContext);
if (deviceCodeContext.Result.IsError)
{
return(deviceCodeContext.Result);
}
_logger.LogDebug("Validation of authorization code token request success");
return(Valid());
}
/// <summary>
/// Validates the device code.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public async Task ValidateAsync(DeviceCodeValidationContext context)
{
var deviceCode = await _devices.FindByDeviceCodeAsync(context.DeviceCode);
if (deviceCode == null)
{
_logger.LogError("Invalid device code");
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.InvalidGrant);
return;
}
// validate client binding
if (deviceCode.ClientId != context.Request.Client.ClientId)
{
_logger.LogError("Client {0} is trying to use a device code from client {1}", context.Request.Client.ClientId, deviceCode.ClientId);
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.InvalidGrant);
return;
}
if (await _throttlingService.ShouldSlowDown(context.DeviceCode, deviceCode))
{
_logger.LogError("Client {0} is polling too fast", deviceCode.ClientId);
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.SlowDown);
return;
}
// validate lifetime
if (deviceCode.CreationTime.AddSeconds(deviceCode.Lifetime) < _systemClock.UtcNow)
{
_logger.LogError("Expired device code");
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.ExpiredToken);
return;
}
// denied
if (deviceCode.IsAuthorized &&
(deviceCode.AuthorizedScopes == null || deviceCode.AuthorizedScopes.Any() == false))
{
_logger.LogError("No scopes authorized for device authorization. Access denied");
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.AccessDenied);
return;
}
// make sure code is authorized
if (!deviceCode.IsAuthorized || deviceCode.Subject == null)
{
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.AuthorizationPending);
return;
}
// make sure user is enabled
var isActiveCtx = new IsActiveContext(deviceCode.Subject, context.Request.Client, IdentityServerConstants.ProfileIsActiveCallers.DeviceCodeValidation);
await _profile.IsActiveAsync(isActiveCtx);
if (isActiveCtx.IsActive == false)
{
_logger.LogError("User has been disabled: {subjectId}", deviceCode.Subject.GetSubjectId());
context.Result = new TokenRequestValidationResult(context.Request, OidcConstants.TokenErrors.InvalidGrant);
return;
}
context.Request.DeviceCode = deviceCode;
context.Request.SessionId = deviceCode.SessionId;
context.Result = new TokenRequestValidationResult(context.Request);
await _devices.RemoveByDeviceCodeAsync(context.DeviceCode);
}