This interface is required by the SignerInterface to signed payloads and create a JWS.
/**
* @param \Jose\Object\SignatureInterface $signature
*
* @throws \InvalidArgumentException
*/
private function checkB64HeaderAndCrit(Object\SignatureInterface $signature)
{
if (!$signature->hasProtectedHeader('b64')) {
return;
}
Assertion::true($signature->hasProtectedHeader('crit'), 'The protected header parameter "crit" is mandatory when protected header parameter "b64" is set.');
Assertion::isArray($signature->getProtectedHeader('crit'), 'The protected header parameter "crit" must be an array.');
Assertion::inArray('b64', $signature->getProtectedHeader('crit'), 'The protected header parameter "crit" must contain "b64" when protected header parameter "b64" is set.');
}
/**
* @param \Jose\Object\SignatureInterface $signature
*
* @return \Jose\Algorithm\SignatureAlgorithmInterface
*/
private function getAlgorithm(Object\SignatureInterface $signature)
{
$complete_headers = array_merge($signature->getProtectedHeaders(), $signature->getHeaders());
Assertion::keyExists($complete_headers, 'alg', 'No "alg" parameter set in the header.');
$algorithm = $this->getJWAManager()->getAlgorithm($complete_headers['alg']);
Assertion::isInstanceOf($algorithm, Algorithm\SignatureAlgorithmInterface::class, sprintf('The algorithm "%s" is not supported or does not implement SignatureInterface.', $complete_headers['alg']));
return $algorithm;
}
/**
* @param \Jose\Object\SignatureInterface $signature
*
* @return bool
*/
private static function isPayloadEncoded(SignatureInterface $signature)
{
return !$signature->hasProtectedHeader('b64') || true === $signature->getProtectedHeader('b64');
}
