.htaccess
1 year ago
Base32.php
1 year ago
Base32Hex.php
1 year ago
Base64.php
1 year ago
Base64DotSlash.php
1 year ago
Base64DotSlashOrdered.php
1 year ago
Base64UrlSafe.php
1 year ago
Binary.php
1 year ago
EncoderInterface.php
1 year ago
Encoding.php
1 year ago
Hex.php
1 year ago
RFC4648.php
1 year ago
index.html
1 year ago
web.config
1 year ago
Binary.php
91 lines
| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | namespace ParagonIE\ConstantTime; |
| 4 | |
| 5 | use TypeError; |
| 6 | |
| 7 | /** |
| 8 | * Copyright (c) 2016 - 2022 Paragon Initiative Enterprises. |
| 9 | * Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com) |
| 10 | * |
| 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 12 | * of this software and associated documentation files (the "Software"), to deal |
| 13 | * in the Software without restriction, including without limitation the rights |
| 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 15 | * copies of the Software, and to permit persons to whom the Software is |
| 16 | * furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice shall be included in all |
| 19 | * copies or substantial portions of the Software. |
| 20 | * |
| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 27 | * SOFTWARE. |
| 28 | */ |
| 29 | |
| 30 | /** |
| 31 | * Class Binary |
| 32 | * |
| 33 | * Binary string operators that don't choke on |
| 34 | * mbstring.func_overload |
| 35 | * |
| 36 | * @package ParagonIE\ConstantTime |
| 37 | */ |
| 38 | abstract class Binary |
| 39 | { |
| 40 | /** |
| 41 | * Safe string length |
| 42 | * |
| 43 | * @ref mbstring.func_overload |
| 44 | * |
| 45 | * @param string $str |
| 46 | * @return int |
| 47 | */ |
| 48 | public static function safeStrlen(string $str): int |
| 49 | { |
| 50 | if (\function_exists('mb_strlen')) { |
| 51 | // mb_strlen in PHP 7.x can return false. |
| 52 | /** @psalm-suppress RedundantCast */ |
| 53 | return (int) \mb_strlen($str, '8bit'); |
| 54 | } else { |
| 55 | return \strlen($str); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Safe substring |
| 61 | * |
| 62 | * @ref mbstring.func_overload |
| 63 | * |
| 64 | * @staticvar boolean $exists |
| 65 | * @param string $str |
| 66 | * @param int $start |
| 67 | * @param ?int $length |
| 68 | * @return string |
| 69 | * |
| 70 | * @throws TypeError |
| 71 | */ |
| 72 | public static function safeSubstr( |
| 73 | string $str, |
| 74 | int $start = 0, |
| 75 | $length = null |
| 76 | ): string { |
| 77 | if ($length === 0) { |
| 78 | return ''; |
| 79 | } |
| 80 | if (\function_exists('mb_substr')) { |
| 81 | return \mb_substr($str, $start, $length, '8bit'); |
| 82 | } |
| 83 | // Unlike mb_substr(), substr() doesn't accept NULL for length |
| 84 | if ($length !== null) { |
| 85 | return \substr($str, $start, $length); |
| 86 | } else { |
| 87 | return \substr($str, $start); |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 |