public function testFileHash()
{
$filename = \tempnam('/tmp', 'x');
$buf = \Sodium\randombytes_buf(65537);
\file_put_contents($filename, $buf);
$fileOne = new ReadOnlyFile($filename);
$fp = \fopen($filename, 'rb');
$fileTwo = new ReadOnlyFile($fp);
$this->assertSame($fileOne->getHash(), $fileTwo->getHash());
\fclose($fp);
}
/**
* Stream encryption - Do not call directly
*
* @param ReadOnlyFile $input
* @param MutableFile $output
* @param EncryptionKey $encKey
* @param string $nonce
* @param resource $mac (hash context)
* @param Config $config
* @throws FileAlert\AccessDenied
*/
private static final function streamEncrypt(ReadOnlyFile $input, MutableFile $output, KeyInterface $encKey, $nonce, $mac, Config $config)
{
if (!$encKey instanceof EncryptionKey) {
throw new \ParagonIE\Halite\Alerts\InvalidKey('Argument 3: Expected an instance of EncryptionKey');
}
$initHash = $input->getHash();
// Begin the streaming decryption
$size = $input->getSize();
while ($input->remainingBytes() > 0) {
$read = $input->readBytes($input->getPos() + $config->BUFFER > $size ? $size - $input->getPos() : $config->BUFFER);
$encrypted = \Sodium\crypto_stream_xor($read, $nonce, $encKey->get());
\hash_update($mac, $encrypted);
$output->writeBytes($encrypted);
\Sodium\increment($nonce);
}
\Sodium\memzero($nonce);
// Check that our input file was not modified before we MAC it
if (!\hash_equals($input->gethash(), $initHash)) {
throw new CryptoException\FileModified('Read-only file has been modified since it was opened for reading');
}
return $output->writeBytes(\hash_final($mac, true));
}
