Base32.php
7 months ago
Base32Hex.php
7 months ago
Base64.php
7 months ago
Base64DotSlash.php
7 months ago
Base64DotSlashOrdered.php
7 months ago
Base64UrlSafe.php
7 months ago
Binary.php
7 months ago
EncoderInterface.php
7 months ago
Encoding.php
7 months ago
Hex.php
7 months ago
RFC4648.php
7 months ago
Base64DotSlash.php
79 lines
| 1 | <?php |
| 2 | |
| 3 | declare (strict_types=1); |
| 4 | namespace AmeliaVendor\ParagonIE\ConstantTime; |
| 5 | |
| 6 | use function pack; |
| 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 | * Class Base64DotSlash |
| 31 | * ./[A-Z][a-z][0-9] |
| 32 | * |
| 33 | * @package \ParagonIE\ConstantTime |
| 34 | */ |
| 35 | abstract class Base64DotSlash extends Base64 |
| 36 | { |
| 37 | /** |
| 38 | * Uses bitwise operators instead of table-lookups to turn 6-bit integers |
| 39 | * into 8-bit integers. |
| 40 | * |
| 41 | * Base64 character set: |
| 42 | * ./ [A-Z] [a-z] [0-9] |
| 43 | * 0x2e-0x2f, 0x41-0x5a, 0x61-0x7a, 0x30-0x39 |
| 44 | * |
| 45 | * @param int $src |
| 46 | * @return int |
| 47 | */ |
| 48 | protected static function decode6Bits(int $src): int |
| 49 | { |
| 50 | $ret = -1; |
| 51 | // if ($src > 0x2d && $src < 0x30) ret += $src - 0x2e + 1; // -45 |
| 52 | $ret += (0x2d - $src & $src - 0x30) >> 8 & $src - 45; |
| 53 | // if ($src > 0x40 && $src < 0x5b) ret += $src - 0x41 + 2 + 1; // -62 |
| 54 | $ret += (0x40 - $src & $src - 0x5b) >> 8 & $src - 62; |
| 55 | // if ($src > 0x60 && $src < 0x7b) ret += $src - 0x61 + 28 + 1; // -68 |
| 56 | $ret += (0x60 - $src & $src - 0x7b) >> 8 & $src - 68; |
| 57 | // if ($src > 0x2f && $src < 0x3a) ret += $src - 0x30 + 54 + 1; // 7 |
| 58 | $ret += (0x2f - $src & $src - 0x3a) >> 8 & $src + 7; |
| 59 | return $ret; |
| 60 | } |
| 61 | /** |
| 62 | * Uses bitwise operators instead of table-lookups to turn 8-bit integers |
| 63 | * into 6-bit integers. |
| 64 | * |
| 65 | * @param int $src |
| 66 | * @return string |
| 67 | */ |
| 68 | protected static function encode6Bits(int $src): string |
| 69 | { |
| 70 | $src += 0x2e; |
| 71 | // if ($src > 0x2f) $src += 0x41 - 0x30; // 17 |
| 72 | $src += 0x2f - $src >> 8 & 17; |
| 73 | // if ($src > 0x5a) $src += 0x61 - 0x5b; // 6 |
| 74 | $src += 0x5a - $src >> 8 & 6; |
| 75 | // if ($src > 0x7a) $src += 0x30 - 0x7b; // -75 |
| 76 | $src -= 0x7a - $src >> 8 & 75; |
| 77 | return pack('C', $src); |
| 78 | } |
| 79 | } |