Returns the number of recipients associated with the JWS.
| public countRecipients ( ) : integer | ||
| return | integer | |
/**
* @param \Jose\Object\JWEInterface $jwe
* @param \Jose\Object\RecipientInterface $recipient
* @param string $cek
* @param \Jose\Algorithm\ContentEncryptionAlgorithmInterface $content_encryption_algorithm
* @param array $additional_headers
*/
private function processRecipient(Object\JWEInterface $jwe, Object\RecipientInterface &$recipient, $cek, Algorithm\ContentEncryptionAlgorithmInterface $content_encryption_algorithm, array &$additional_headers)
{
if (null === $recipient->getRecipientKey()) {
return;
}
$complete_headers = array_merge($jwe->getSharedProtectedHeaders(), $jwe->getSharedHeaders(), $recipient->getHeaders());
$key_encryption_algorithm = $this->findKeyEncryptionAlgorithm($complete_headers);
$this->checkKeys($key_encryption_algorithm, $content_encryption_algorithm, $recipient->getRecipientKey());
$encrypted_content_encryption_key = $this->getEncryptedKey($complete_headers, $cek, $key_encryption_algorithm, $content_encryption_algorithm, $additional_headers, $recipient->getRecipientKey());
$recipient_headers = $recipient->getHeaders();
if (!empty($additional_headers) && 1 !== $jwe->countRecipients()) {
$recipient_headers = array_merge($recipient_headers, $additional_headers);
$additional_headers = [];
}
$recipient = Object\Recipient::createRecipientFromLoadedJWE($recipient_headers, $encrypted_content_encryption_key);
}
/**
* @param \Jose\Object\JWEInterface $jwe
*
* @return \Jose\Compression\CompressionInterface|null
*/
private function getCompressionMethod(Object\JWEInterface $jwe)
{
$method = null;
$nb_recipients = $jwe->countRecipients();
for ($i = 0; $i < $nb_recipients; $i++) {
$complete_headers = array_merge($jwe->getSharedProtectedHeaders(), $jwe->getSharedHeaders(), $jwe->getRecipient($i)->getHeaders());
if (array_key_exists('zip', $complete_headers)) {
if (null === $method) {
if (0 === $i) {
$method = $complete_headers['zip'];
} else {
throw new \InvalidArgumentException('Inconsistent "zip" parameter.');
}
} else {
Assertion::eq($method, $complete_headers['zip'], 'Inconsistent "zip" parameter.');
}
} else {
Assertion::eq(null, $method, 'Inconsistent "zip" parameter.');
}
}
if (null === $method) {
return;
}
$compression_method = $this->getCompressionManager()->getCompressionAlgorithm($method);
Assertion::isInstanceOf($compression_method, Compression\CompressionInterface::class, sprintf('Compression method "%s" not supported.', $method));
return $compression_method;
}
/**
* @param \Jose\Object\JWEInterface $jwe
*/
private function checkRecipients(Object\JWEInterface $jwe)
{
Assertion::greaterThan($jwe->countRecipients(), 0, 'The JWE does not contain any recipient.');
}
