/**
* @param $base64
* @return array
*/
public function unserialize($base64)
{
$binary = base64_decode($base64, true);
if ($binary === false) {
throw new \InvalidArgumentException('Invalid base64');
}
$values = [];
$pos = 0;
$end = strlen($binary);
for ($i = 0; $i < 3; $i++) {
if ($end - $pos < 4) {
throw new \RuntimeException('Length marker too short');
}
$length = unpack("N", substr($binary, $pos, 4))[1];
$pos += 4;
if ($end - $pos < $length) {
throw new \RuntimeException('Not enough data');
}
$value = substr($binary, $pos, $length);
$pos += $length;
$values[$i] = $value;
}
$curveName = $values[1];
$pointHex = unpack("H*", $values[2])[1];
$curve = Curves::curve($curveName);
$generator = Curves::generator($curveName);
$point = $this->pointSerializer->unserialize($curve, $pointHex);
$publicKey = new PublicKey($this->math, $generator, $point);
return [$curve, $publicKey];
}
/**
* @expectedException \InvalidArgumentException
* @expectedExceptionMessage Unknown or unsupported curve
*/
public function testRejectsInvalidCurve()
{
Curves::curve('not-a-curve');
}
