/**
* Constructs a new secure cookie.
*
* The user GID has to be set in order to send a secure cookie.
*
* @param HashFunction $hmacFunction the HMAC function
* @param HashFunction $hmacKeyFunction the HMAC key function
* @param SymmetricCypher $symmetricCypher the symmetric cypher
* @param string $secretKey the secret key
* @param GID $gid a GID instance
* @param string $sessionIdentifier a unique session identifier
* @param string|null $userGID the GID of the current user or <code>null</code> if the GID is
* not known
* @throws InvalidArgumentException if the HMAC key function provides a key size too small for
* creating a key for the symmetric cypher
*/
public function __construct(HashFunction $hmacFunction, HashFunction $hmacKeyFunction, SymmetricCypher $symmetricCypher, $secretKey, GID $gid, $sessionIdentifier, $userGID = null)
{
$this->hmacFunction = $hmacFunction;
$this->hmacKeyFunction = $hmacKeyFunction;
$this->symmetricCypher = $symmetricCypher;
$this->secretKey = $secretKey;
$this->gid = $gid;
$this->sessionIdentifier = $sessionIdentifier;
$this->userGID = $userGID;
$requiredSize = $symmetricCypher->getKeySize();
$keySize = $hmacKeyFunction->getHashLength();
if ($keySize < $requiredSize) {
throw new InvalidArgumentException('Warning: Invalid combination of algorithms for secure Cookie, HMAC Key function must produce a key longer or equal to the symmetric cypher key size.');
}
}
