If you find yourself in the need of generating a CSRF token for a ‘built’ Request or something in that fashion, you can do it rather easily:

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$csrfProvider = $this->container->get('form.csrf_provider');
$csrfToken = $csrfProvider->generateCsrfToken('unknown');

‘unknown’ is the default ‘intention’ of CSRF tokens in Symfony2, change ‘unknown’ for the correct intention if you are using that option.