/**
* @dataProvider vectors
*/
public function testPoly1305($input, $key, $tag)
{
$input = pack('H*', $input);
$key = pack('H*', $key);
$tag = pack('H*', $tag);
$mac = new \fpoirotte\Pssht\Poly1305($key);
$this->assertSame($tag, $mac->mac($input));
}
public function ad($IV, $C, $A, $T)
{
$len = $this->header->decrypt($A, $IV, 0);
if ($C === null && $T === null) {
return $len;
}
$polyKey = $this->main->encrypt(str_repeat("", 32), $IV, 0);
$poly = new \fpoirotte\Pssht\Poly1305($polyKey);
if ($poly->mac($A . $C) !== $T) {
return null;
}
return $this->main->decrypt($C, $IV, 1);
}