/**
* Unregisters an encryption module
*
* @param IEncryptionModule $module
*/
public function unregisterEncryptionModule(IEncryptionModule $module)
{
unset($this->encryptionModules[$module->getId()]);
}
/**
* create header for encrypted file
*
* @param array $headerData
* @param IEncryptionModule $encryptionModule
* @return string
* @throws EncryptionHeaderToLargeException if header has to many arguments
* @throws EncryptionHeaderKeyExistsException if header key is already in use
*/
public function createHeader(array $headerData, IEncryptionModule $encryptionModule)
{
$header = self::HEADER_START . ':' . self::HEADER_ENCRYPTION_MODULE_KEY . ':' . $encryptionModule->getId() . ':';
foreach ($headerData as $key => $value) {
if (in_array($key, $this->ocHeaderKeys)) {
throw new EncryptionHeaderKeyExistsException($key);
}
$header .= $key . ':' . $value . ':';
}
$header .= self::HEADER_END;
if (strlen($header) > $this->getHeaderSize()) {
throw new EncryptionHeaderToLargeException();
}
$paddedHeader = str_pad($header, $this->headerSize, self::HEADER_PADDING_CHAR, STR_PAD_RIGHT);
return $paddedHeader;
}
