-
-
Notifications
You must be signed in to change notification settings - Fork 3.6k
Expand file tree
/
Copy pathDataStream.php
More file actions
62 lines (49 loc) · 1.27 KB
/
DataStream.php
File metadata and controls
62 lines (49 loc) · 1.27 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
<?php
declare(strict_types=1);
namespace PhpMyAdmin\WebAuthn;
use function fopen;
use function fread;
use function ftell;
use function fwrite;
use function rewind;
final class DataStream
{
/** @var resource */
private $stream;
/** @throws WebAuthnException */
public function __construct(string $binaryString)
{
$resource = fopen('php://memory', 'rb+');
if ($resource === false || fwrite($resource, $binaryString) === false) {
throw new WebAuthnException();
}
if (! rewind($resource)) {
throw new WebAuthnException();
}
$this->stream = $resource;
}
/** @throws WebAuthnException */
public function take(int $length): string
{
if ($length < 0) {
throw new WebAuthnException();
}
if ($length === 0) {
return '';
}
$string = fread($this->stream, $length);
if ($string === false) {
throw new WebAuthnException();
}
return $string;
}
/** @throws WebAuthnException */
public function getPosition(): int
{
$position = ftell($this->stream);
if ($position === false) {
throw new WebAuthnException();
}
return $position;
}
}