// AuthFunc spies on cfg.AuthFunc calls, sending passed AuthRequest
// to the returned channel.
//
// If cfg.AuthFunc is non-nil, it is called after the value is sent.
func (d *Driver) AuthFunc(cfg *keygen.Config) <-chan *keygen.AuthRequest {
ch := make(chan *keygen.AuthRequest, d.ChanCap)
fn := cfg.AuthFunc
cfg.AuthFunc = func(req *keygen.AuthRequest) error {
ch <- req
if fn != nil {
return fn(req)
}
return nil
}
return ch
}
