Matthias Andreas Benkard | 7b2a3a1 | 2021-08-16 10:57:25 +0200 | [diff] [blame^] | 1 | <?php |
| 2 | |
| 3 | namespace LdapRecord\Models\Attributes; |
| 4 | |
| 5 | use InvalidArgumentException; |
| 6 | use LdapRecord\Utilities; |
| 7 | |
| 8 | class Sid |
| 9 | { |
| 10 | /** |
| 11 | * The string SID value. |
| 12 | * |
| 13 | * @var string |
| 14 | */ |
| 15 | protected $value; |
| 16 | |
| 17 | /** |
| 18 | * Determines if the specified SID is valid. |
| 19 | * |
| 20 | * @param string $sid |
| 21 | * |
| 22 | * @return bool |
| 23 | */ |
| 24 | public static function isValid($sid) |
| 25 | { |
| 26 | return Utilities::isValidSid($sid); |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Constructor. |
| 31 | * |
| 32 | * @param mixed $value |
| 33 | * |
| 34 | * @throws InvalidArgumentException |
| 35 | */ |
| 36 | public function __construct($value) |
| 37 | { |
| 38 | if (static::isValid($value)) { |
| 39 | $this->value = $value; |
| 40 | } elseif ($value = $this->binarySidToString($value)) { |
| 41 | $this->value = $value; |
| 42 | } else { |
| 43 | throw new InvalidArgumentException('Invalid Binary / String SID.'); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Returns the string value of the SID. |
| 49 | * |
| 50 | * @return string |
| 51 | */ |
| 52 | public function __toString() |
| 53 | { |
| 54 | return $this->getValue(); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Returns the string value of the SID. |
| 59 | * |
| 60 | * @return string |
| 61 | */ |
| 62 | public function getValue() |
| 63 | { |
| 64 | return $this->value; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Returns the binary variant of the SID. |
| 69 | * |
| 70 | * @return string |
| 71 | */ |
| 72 | public function getBinary() |
| 73 | { |
| 74 | $sid = explode('-', ltrim($this->value, 'S-')); |
| 75 | |
| 76 | $level = (int) array_shift($sid); |
| 77 | |
| 78 | $authority = (int) array_shift($sid); |
| 79 | |
| 80 | $subAuthorities = array_map('intval', $sid); |
| 81 | |
| 82 | $params = array_merge( |
| 83 | ['C2xxNV*', $level, count($subAuthorities), $authority], |
| 84 | $subAuthorities |
| 85 | ); |
| 86 | |
| 87 | return call_user_func_array('pack', $params); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Returns the string variant of a binary SID. |
| 92 | * |
| 93 | * @param string $binary |
| 94 | * |
| 95 | * @return string|null |
| 96 | */ |
| 97 | protected function binarySidToString($binary) |
| 98 | { |
| 99 | return Utilities::binarySidToString($binary); |
| 100 | } |
| 101 | } |