/**
* Creates a DigestChallenge object from a string
*
* Example input string:
* <pre>
* realm="example.com",nonce="GMybUaOM4lpMlJbeRwxOLzTalYDwLAxv/sLf8de4DPA=",
* qop="auth,auth-int,auth-conf",cipher="rc4-40,rc4-56,rc4",charset=utf-8,
* algorithm=md5-sess
* </pre>
*
* @param string s
* @return security.sasl.DigestChallenge
* @throws lang.FormatException
*/
public static function fromString($s)
{
with($challenge = new DigestChallenge());
$s .= ',';
while ($p = strpos($s, '=')) {
$key = substr($s, 0, $p);
$t = '"' == $s[$p + 1] ? strpos($s, '"', $p + 2) + 1 : strpos($s, ',', $p + 1);
$value = trim(substr($s, $p + 1, $t - $p - 1), '"');
switch ($key) {
case 'realm':
$challenge->setRealm($value);
break;
case 'domain':
$challenge->setDomain($value);
break;
case 'nonce':
$challenge->setNonce($value);
break;
case 'qop':
$challenge->setQop(explode(',', strtolower($value)));
break;
case 'cipher':
$challenge->setCipher(explode(',', strtolower($value)));
break;
case 'charset':
$challenge->setCharset($value);
break;
case 'algorithm':
$challenge->setAlgorithm($value);
break;
case 'stale':
$challenge->setStale(0 == strcasecmp($value, 'true'));
break;
case 'opaque':
$challenge->setOpaque($value);
break;
case 'maxbuf':
$challenge->setMaxbuf(intval($value));
break;
default:
throw new FormatException('Unrecognized key "' . $key . '"');
}
$s = substr($s, $t + 1);
}
return $challenge;
}
