FIDO U2F Sign Operation - iOS Example

Below is the code related to processing a FIDO U2F sign operation.

SurePassIdU2F *u2f;
U2FClientSettings *settings = [[U2FClientSettings alloc]
                               initWithNavigationController:self.navigationController
                               fidoEndpointURL:serverUrl];

u2f = [[SurePassIdU2F alloc] initWithSettings:settings];

[u2f registerUsername:self->_username
            securityKeyName:alert.textFields.firstObject.text
  fidoRegisterResultHandler:^(enum U2FResult result) {
  switch (result) {
    case SUCCESS:
      // FIDO Registration succeeded.
      break;

    case CANCELED:
      // The user canceled FIDO Registration.
      break;

    case FALLBACK_AUTHENTICATION:
      // IGNORED! Not applicable to registration.
      break;
  }
} fidoClientErrorHandler:^(NSString * _Nullable errorMessage) {
  // Handle FIDO Client errors.
} fidoServerErrorHandler:^(NSString * _Nullable errorMessage, int errorCode) {
  // Handle FIDO Server errors.
}];