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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 827 | daniel-mar | 1 | <?php |
| 2 | declare(strict_types=1); |
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| 3 | namespace ParagonIE\ConstantTime; |
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| 4 | |||
| 874 | daniel-mar | 5 | use InvalidArgumentException; |
| 6 | use RangeException; |
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| 7 | use TypeError; |
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| 8 | |||
| 827 | daniel-mar | 9 | /** |
| 874 | daniel-mar | 10 | * Copyright (c) 2016 - 2022 Paragon Initiative Enterprises. |
| 827 | daniel-mar | 11 | * Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com) |
| 12 | * |
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| 13 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 14 | * of this software and associated documentation files (the "Software"), to deal |
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| 15 | * in the Software without restriction, including without limitation the rights |
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| 16 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 17 | * copies of the Software, and to permit persons to whom the Software is |
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| 18 | * furnished to do so, subject to the following conditions: |
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| 19 | * |
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| 20 | * The above copyright notice and this permission notice shall be included in all |
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| 21 | * copies or substantial portions of the Software. |
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| 22 | * |
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| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 24 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 25 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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| 26 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 27 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 28 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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| 29 | * SOFTWARE. |
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| 30 | */ |
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| 31 | |||
| 32 | /** |
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| 33 | * Class Base32 |
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| 34 | * [A-Z][2-7] |
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| 35 | * |
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| 36 | * @package ParagonIE\ConstantTime |
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| 37 | */ |
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| 38 | abstract class Base32 implements EncoderInterface |
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| 39 | { |
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| 40 | /** |
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| 41 | * Decode a Base32-encoded string into raw binary |
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| 42 | * |
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| 43 | * @param string $encodedString |
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| 44 | * @param bool $strictPadding |
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| 45 | * @return string |
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| 46 | */ |
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| 47 | public static function decode(string $encodedString, bool $strictPadding = false): string |
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| 48 | { |
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| 49 | return static::doDecode($encodedString, false, $strictPadding); |
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| 50 | } |
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| 51 | |||
| 52 | /** |
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| 53 | * Decode an uppercase Base32-encoded string into raw binary |
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| 54 | * |
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| 55 | * @param string $src |
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| 56 | * @param bool $strictPadding |
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| 57 | * @return string |
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| 58 | */ |
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| 59 | public static function decodeUpper(string $src, bool $strictPadding = false): string |
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| 60 | { |
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| 61 | return static::doDecode($src, true, $strictPadding); |
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| 62 | } |
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| 63 | |||
| 64 | /** |
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| 65 | * Encode into Base32 (RFC 4648) |
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| 66 | * |
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| 67 | * @param string $binString |
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| 68 | * @return string |
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| 874 | daniel-mar | 69 | * @throws TypeError |
| 827 | daniel-mar | 70 | */ |
| 71 | public static function encode(string $binString): string |
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| 72 | { |
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| 73 | return static::doEncode($binString, false, true); |
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| 74 | } |
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| 75 | /** |
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| 76 | * Encode into Base32 (RFC 4648) |
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| 77 | * |
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| 78 | * @param string $src |
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| 79 | * @return string |
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| 874 | daniel-mar | 80 | * @throws TypeError |
| 827 | daniel-mar | 81 | */ |
| 82 | public static function encodeUnpadded(string $src): string |
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| 83 | { |
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| 84 | return static::doEncode($src, false, false); |
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| 85 | } |
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| 86 | |||
| 87 | /** |
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| 88 | * Encode into uppercase Base32 (RFC 4648) |
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| 89 | * |
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| 90 | * @param string $src |
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| 91 | * @return string |
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| 874 | daniel-mar | 92 | * @throws TypeError |
| 827 | daniel-mar | 93 | */ |
| 94 | public static function encodeUpper(string $src): string |
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| 95 | { |
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| 96 | return static::doEncode($src, true, true); |
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| 97 | } |
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| 98 | |||
| 99 | /** |
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| 100 | * Encode into uppercase Base32 (RFC 4648) |
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| 101 | * |
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| 102 | * @param string $src |
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| 103 | * @return string |
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| 874 | daniel-mar | 104 | * @throws TypeError |
| 827 | daniel-mar | 105 | */ |
| 106 | public static function encodeUpperUnpadded(string $src): string |
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| 107 | { |
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| 108 | return static::doEncode($src, true, false); |
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| 109 | } |
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| 110 | |||
| 111 | /** |
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| 112 | * Uses bitwise operators instead of table-lookups to turn 5-bit integers |
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| 113 | * into 8-bit integers. |
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| 114 | * |
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| 115 | * @param int $src |
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| 116 | * @return int |
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| 117 | */ |
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| 118 | protected static function decode5Bits(int $src): int |
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| 119 | { |
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| 120 | $ret = -1; |
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| 121 | |||
| 122 | // if ($src > 96 && $src < 123) $ret += $src - 97 + 1; // -64 |
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| 123 | $ret += (((0x60 - $src) & ($src - 0x7b)) >> 8) & ($src - 96); |
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| 124 | |||
| 125 | // if ($src > 0x31 && $src < 0x38) $ret += $src - 24 + 1; // -23 |
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| 126 | $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23); |
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| 127 | |||
| 128 | return $ret; |
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| 129 | } |
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| 130 | |||
| 131 | /** |
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| 132 | * Uses bitwise operators instead of table-lookups to turn 5-bit integers |
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| 133 | * into 8-bit integers. |
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| 134 | * |
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| 135 | * Uppercase variant. |
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| 136 | * |
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| 137 | * @param int $src |
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| 138 | * @return int |
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| 139 | */ |
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| 140 | protected static function decode5BitsUpper(int $src): int |
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| 141 | { |
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| 142 | $ret = -1; |
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| 143 | |||
| 144 | // if ($src > 64 && $src < 91) $ret += $src - 65 + 1; // -64 |
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| 145 | $ret += (((0x40 - $src) & ($src - 0x5b)) >> 8) & ($src - 64); |
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| 146 | |||
| 147 | // if ($src > 0x31 && $src < 0x38) $ret += $src - 24 + 1; // -23 |
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| 148 | $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23); |
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| 149 | |||
| 150 | return $ret; |
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| 151 | } |
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| 152 | |||
| 153 | /** |
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| 154 | * Uses bitwise operators instead of table-lookups to turn 8-bit integers |
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| 155 | * into 5-bit integers. |
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| 156 | * |
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| 157 | * @param int $src |
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| 158 | * @return string |
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| 159 | */ |
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| 160 | protected static function encode5Bits(int $src): string |
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| 161 | { |
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| 162 | $diff = 0x61; |
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| 163 | |||
| 164 | // if ($src > 25) $ret -= 72; |
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| 165 | $diff -= ((25 - $src) >> 8) & 73; |
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| 166 | |||
| 167 | return \pack('C', $src + $diff); |
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| 168 | } |
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| 169 | |||
| 170 | /** |
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| 171 | * Uses bitwise operators instead of table-lookups to turn 8-bit integers |
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| 172 | * into 5-bit integers. |
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| 173 | * |
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| 174 | * Uppercase variant. |
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| 175 | * |
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| 176 | * @param int $src |
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| 177 | * @return string |
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| 178 | */ |
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| 179 | protected static function encode5BitsUpper(int $src): string |
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| 180 | { |
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| 181 | $diff = 0x41; |
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| 182 | |||
| 183 | // if ($src > 25) $ret -= 40; |
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| 184 | $diff -= ((25 - $src) >> 8) & 41; |
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| 185 | |||
| 186 | return \pack('C', $src + $diff); |
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| 187 | } |
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| 188 | |||
| 874 | daniel-mar | 189 | /** |
| 190 | * @param string $encodedString |
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| 191 | * @param bool $upper |
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| 192 | * @return string |
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| 193 | */ |
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| 194 | public static function decodeNoPadding(string $encodedString, bool $upper = false): string |
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| 195 | { |
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| 196 | $srcLen = Binary::safeStrlen($encodedString); |
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| 197 | if ($srcLen === 0) { |
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| 198 | return ''; |
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| 199 | } |
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| 200 | if (($srcLen & 7) === 0) { |
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| 201 | for ($j = 0; $j < 7 && $j < $srcLen; ++$j) { |
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| 202 | if ($encodedString[$srcLen - $j - 1] === '=') { |
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| 203 | throw new InvalidArgumentException( |
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| 204 | "decodeNoPadding() doesn't tolerate padding" |
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| 205 | ); |
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| 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | return static::doDecode( |
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| 210 | $encodedString, |
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| 211 | $upper, |
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| 212 | true |
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| 213 | ); |
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| 214 | } |
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| 827 | daniel-mar | 215 | |
| 216 | /** |
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| 217 | * Base32 decoding |
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| 218 | * |
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| 219 | * @param string $src |
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| 220 | * @param bool $upper |
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| 221 | * @param bool $strictPadding |
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| 222 | * @return string |
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| 874 | daniel-mar | 223 | * |
| 224 | * @throws TypeError |
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| 827 | daniel-mar | 225 | * @psalm-suppress RedundantCondition |
| 226 | */ |
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| 874 | daniel-mar | 227 | protected static function doDecode( |
| 228 | string $src, |
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| 229 | bool $upper = false, |
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| 230 | bool $strictPadding = false |
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| 231 | ): string { |
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| 827 | daniel-mar | 232 | // We do this to reduce code duplication: |
| 233 | $method = $upper |
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| 234 | ? 'decode5BitsUpper' |
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| 235 | : 'decode5Bits'; |
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| 236 | |||
| 237 | // Remove padding |
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| 238 | $srcLen = Binary::safeStrlen($src); |
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| 239 | if ($srcLen === 0) { |
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| 240 | return ''; |
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| 241 | } |
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| 242 | if ($strictPadding) { |
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| 243 | if (($srcLen & 7) === 0) { |
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| 244 | for ($j = 0; $j < 7; ++$j) { |
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| 245 | if ($src[$srcLen - 1] === '=') { |
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| 246 | $srcLen--; |
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| 247 | } else { |
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| 248 | break; |
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| 249 | } |
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| 250 | } |
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| 251 | } |
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| 252 | if (($srcLen & 7) === 1) { |
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| 874 | daniel-mar | 253 | throw new RangeException( |
| 827 | daniel-mar | 254 | 'Incorrect padding' |
| 255 | ); |
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| 256 | } |
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| 257 | } else { |
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| 258 | $src = \rtrim($src, '='); |
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| 259 | $srcLen = Binary::safeStrlen($src); |
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| 260 | } |
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| 261 | |||
| 262 | $err = 0; |
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| 263 | $dest = ''; |
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| 264 | // Main loop (no padding): |
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| 265 | for ($i = 0; $i + 8 <= $srcLen; $i += 8) { |
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| 266 | /** @var array<int, int> $chunk */ |
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| 267 | $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 8)); |
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| 268 | /** @var int $c0 */ |
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| 269 | $c0 = static::$method($chunk[1]); |
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| 270 | /** @var int $c1 */ |
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| 271 | $c1 = static::$method($chunk[2]); |
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| 272 | /** @var int $c2 */ |
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| 273 | $c2 = static::$method($chunk[3]); |
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| 274 | /** @var int $c3 */ |
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| 275 | $c3 = static::$method($chunk[4]); |
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| 276 | /** @var int $c4 */ |
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| 277 | $c4 = static::$method($chunk[5]); |
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| 278 | /** @var int $c5 */ |
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| 279 | $c5 = static::$method($chunk[6]); |
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| 280 | /** @var int $c6 */ |
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| 281 | $c6 = static::$method($chunk[7]); |
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| 282 | /** @var int $c7 */ |
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| 283 | $c7 = static::$method($chunk[8]); |
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| 284 | |||
| 285 | $dest .= \pack( |
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| 286 | 'CCCCC', |
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| 287 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 288 | (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff, |
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| 289 | (($c3 << 4) | ($c4 >> 1) ) & 0xff, |
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| 290 | (($c4 << 7) | ($c5 << 2) | ($c6 >> 3)) & 0xff, |
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| 291 | (($c6 << 5) | ($c7 ) ) & 0xff |
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| 292 | ); |
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| 293 | $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5 | $c6 | $c7) >> 8; |
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| 294 | } |
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| 295 | // The last chunk, which may have padding: |
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| 296 | if ($i < $srcLen) { |
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| 297 | /** @var array<int, int> $chunk */ |
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| 298 | $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i)); |
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| 299 | /** @var int $c0 */ |
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| 300 | $c0 = static::$method($chunk[1]); |
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| 301 | |||
| 302 | if ($i + 6 < $srcLen) { |
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| 303 | /** @var int $c1 */ |
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| 304 | $c1 = static::$method($chunk[2]); |
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| 305 | /** @var int $c2 */ |
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| 306 | $c2 = static::$method($chunk[3]); |
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| 307 | /** @var int $c3 */ |
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| 308 | $c3 = static::$method($chunk[4]); |
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| 309 | /** @var int $c4 */ |
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| 310 | $c4 = static::$method($chunk[5]); |
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| 311 | /** @var int $c5 */ |
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| 312 | $c5 = static::$method($chunk[6]); |
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| 313 | /** @var int $c6 */ |
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| 314 | $c6 = static::$method($chunk[7]); |
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| 315 | |||
| 316 | $dest .= \pack( |
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| 317 | 'CCCC', |
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| 318 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 319 | (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff, |
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| 320 | (($c3 << 4) | ($c4 >> 1) ) & 0xff, |
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| 321 | (($c4 << 7) | ($c5 << 2) | ($c6 >> 3)) & 0xff |
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| 322 | ); |
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| 323 | $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5 | $c6) >> 8; |
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| 874 | daniel-mar | 324 | if ($strictPadding) { |
| 325 | $err |= ($c6 << 5) & 0xff; |
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| 326 | } |
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| 827 | daniel-mar | 327 | } elseif ($i + 5 < $srcLen) { |
| 328 | /** @var int $c1 */ |
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| 329 | $c1 = static::$method($chunk[2]); |
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| 330 | /** @var int $c2 */ |
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| 331 | $c2 = static::$method($chunk[3]); |
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| 332 | /** @var int $c3 */ |
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| 333 | $c3 = static::$method($chunk[4]); |
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| 334 | /** @var int $c4 */ |
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| 335 | $c4 = static::$method($chunk[5]); |
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| 336 | /** @var int $c5 */ |
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| 337 | $c5 = static::$method($chunk[6]); |
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| 338 | |||
| 339 | $dest .= \pack( |
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| 340 | 'CCCC', |
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| 341 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 342 | (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff, |
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| 343 | (($c3 << 4) | ($c4 >> 1) ) & 0xff, |
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| 344 | (($c4 << 7) | ($c5 << 2) ) & 0xff |
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| 345 | ); |
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| 346 | $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5) >> 8; |
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| 347 | } elseif ($i + 4 < $srcLen) { |
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| 348 | /** @var int $c1 */ |
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| 349 | $c1 = static::$method($chunk[2]); |
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| 350 | /** @var int $c2 */ |
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| 351 | $c2 = static::$method($chunk[3]); |
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| 352 | /** @var int $c3 */ |
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| 353 | $c3 = static::$method($chunk[4]); |
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| 354 | /** @var int $c4 */ |
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| 355 | $c4 = static::$method($chunk[5]); |
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| 356 | |||
| 357 | $dest .= \pack( |
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| 358 | 'CCC', |
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| 359 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 360 | (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff, |
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| 361 | (($c3 << 4) | ($c4 >> 1) ) & 0xff |
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| 362 | ); |
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| 363 | $err |= ($c0 | $c1 | $c2 | $c3 | $c4) >> 8; |
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| 874 | daniel-mar | 364 | if ($strictPadding) { |
| 365 | $err |= ($c4 << 7) & 0xff; |
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| 366 | } |
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| 827 | daniel-mar | 367 | } elseif ($i + 3 < $srcLen) { |
| 368 | /** @var int $c1 */ |
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| 369 | $c1 = static::$method($chunk[2]); |
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| 370 | /** @var int $c2 */ |
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| 371 | $c2 = static::$method($chunk[3]); |
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| 372 | /** @var int $c3 */ |
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| 373 | $c3 = static::$method($chunk[4]); |
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| 374 | |||
| 375 | $dest .= \pack( |
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| 376 | 'CC', |
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| 377 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 378 | (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff |
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| 379 | ); |
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| 380 | $err |= ($c0 | $c1 | $c2 | $c3) >> 8; |
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| 874 | daniel-mar | 381 | if ($strictPadding) { |
| 382 | $err |= ($c3 << 4) & 0xff; |
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| 383 | } |
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| 827 | daniel-mar | 384 | } elseif ($i + 2 < $srcLen) { |
| 385 | /** @var int $c1 */ |
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| 386 | $c1 = static::$method($chunk[2]); |
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| 387 | /** @var int $c2 */ |
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| 388 | $c2 = static::$method($chunk[3]); |
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| 389 | |||
| 390 | $dest .= \pack( |
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| 391 | 'CC', |
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| 392 | (($c0 << 3) | ($c1 >> 2) ) & 0xff, |
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| 393 | (($c1 << 6) | ($c2 << 1) ) & 0xff |
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| 394 | ); |
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| 395 | $err |= ($c0 | $c1 | $c2) >> 8; |
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| 874 | daniel-mar | 396 | if ($strictPadding) { |
| 397 | $err |= ($c2 << 6) & 0xff; |
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| 398 | } |
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| 827 | daniel-mar | 399 | } elseif ($i + 1 < $srcLen) { |
| 400 | /** @var int $c1 */ |
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| 401 | $c1 = static::$method($chunk[2]); |
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| 402 | |||
| 403 | $dest .= \pack( |
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| 404 | 'C', |
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| 405 | (($c0 << 3) | ($c1 >> 2) ) & 0xff |
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| 406 | ); |
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| 407 | $err |= ($c0 | $c1) >> 8; |
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| 874 | daniel-mar | 408 | if ($strictPadding) { |
| 409 | $err |= ($c1 << 6) & 0xff; |
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| 410 | } |
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| 827 | daniel-mar | 411 | } else { |
| 412 | $dest .= \pack( |
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| 413 | 'C', |
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| 414 | (($c0 << 3) ) & 0xff |
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| 415 | ); |
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| 416 | $err |= ($c0) >> 8; |
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| 417 | } |
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| 418 | } |
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| 419 | $check = ($err === 0); |
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| 420 | if (!$check) { |
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| 874 | daniel-mar | 421 | throw new RangeException( |
| 827 | daniel-mar | 422 | 'Base32::doDecode() only expects characters in the correct base32 alphabet' |
| 423 | ); |
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| 424 | } |
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| 425 | return $dest; |
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| 426 | } |
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| 427 | |||
| 428 | /** |
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| 429 | * Base32 Encoding |
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| 430 | * |
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| 431 | * @param string $src |
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| 432 | * @param bool $upper |
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| 433 | * @param bool $pad |
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| 434 | * @return string |
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| 874 | daniel-mar | 435 | * @throws TypeError |
| 827 | daniel-mar | 436 | */ |
| 437 | protected static function doEncode(string $src, bool $upper = false, $pad = true): string |
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| 438 | { |
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| 439 | // We do this to reduce code duplication: |
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| 440 | $method = $upper |
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| 441 | ? 'encode5BitsUpper' |
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| 442 | : 'encode5Bits'; |
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| 443 | |||
| 444 | $dest = ''; |
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| 445 | $srcLen = Binary::safeStrlen($src); |
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| 446 | |||
| 447 | // Main loop (no padding): |
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| 448 | for ($i = 0; $i + 5 <= $srcLen; $i += 5) { |
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| 449 | /** @var array<int, int> $chunk */ |
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| 450 | $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 5)); |
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| 451 | $b0 = $chunk[1]; |
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| 452 | $b1 = $chunk[2]; |
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| 453 | $b2 = $chunk[3]; |
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| 454 | $b3 = $chunk[4]; |
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| 455 | $b4 = $chunk[5]; |
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| 456 | $dest .= |
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| 457 | static::$method( ($b0 >> 3) & 31) . |
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| 458 | static::$method((($b0 << 2) | ($b1 >> 6)) & 31) . |
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| 459 | static::$method((($b1 >> 1) ) & 31) . |
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| 460 | static::$method((($b1 << 4) | ($b2 >> 4)) & 31) . |
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| 461 | static::$method((($b2 << 1) | ($b3 >> 7)) & 31) . |
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| 462 | static::$method((($b3 >> 2) ) & 31) . |
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| 463 | static::$method((($b3 << 3) | ($b4 >> 5)) & 31) . |
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| 464 | static::$method( $b4 & 31); |
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| 465 | } |
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| 466 | // The last chunk, which may have padding: |
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| 467 | if ($i < $srcLen) { |
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| 468 | /** @var array<int, int> $chunk */ |
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| 469 | $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i)); |
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| 470 | $b0 = $chunk[1]; |
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| 471 | if ($i + 3 < $srcLen) { |
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| 472 | $b1 = $chunk[2]; |
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| 473 | $b2 = $chunk[3]; |
||
| 474 | $b3 = $chunk[4]; |
||
| 475 | $dest .= |
||
| 476 | static::$method( ($b0 >> 3) & 31) . |
||
| 477 | static::$method((($b0 << 2) | ($b1 >> 6)) & 31) . |
||
| 478 | static::$method((($b1 >> 1) ) & 31) . |
||
| 479 | static::$method((($b1 << 4) | ($b2 >> 4)) & 31) . |
||
| 480 | static::$method((($b2 << 1) | ($b3 >> 7)) & 31) . |
||
| 481 | static::$method((($b3 >> 2) ) & 31) . |
||
| 482 | static::$method((($b3 << 3) ) & 31); |
||
| 483 | if ($pad) { |
||
| 484 | $dest .= '='; |
||
| 485 | } |
||
| 486 | } elseif ($i + 2 < $srcLen) { |
||
| 487 | $b1 = $chunk[2]; |
||
| 488 | $b2 = $chunk[3]; |
||
| 489 | $dest .= |
||
| 490 | static::$method( ($b0 >> 3) & 31) . |
||
| 491 | static::$method((($b0 << 2) | ($b1 >> 6)) & 31) . |
||
| 492 | static::$method((($b1 >> 1) ) & 31) . |
||
| 493 | static::$method((($b1 << 4) | ($b2 >> 4)) & 31) . |
||
| 494 | static::$method((($b2 << 1) ) & 31); |
||
| 495 | if ($pad) { |
||
| 496 | $dest .= '==='; |
||
| 497 | } |
||
| 498 | } elseif ($i + 1 < $srcLen) { |
||
| 499 | $b1 = $chunk[2]; |
||
| 500 | $dest .= |
||
| 501 | static::$method( ($b0 >> 3) & 31) . |
||
| 502 | static::$method((($b0 << 2) | ($b1 >> 6)) & 31) . |
||
| 503 | static::$method((($b1 >> 1) ) & 31) . |
||
| 504 | static::$method((($b1 << 4) ) & 31); |
||
| 505 | if ($pad) { |
||
| 506 | $dest .= '===='; |
||
| 507 | } |
||
| 508 | } else { |
||
| 509 | $dest .= |
||
| 510 | static::$method( ($b0 >> 3) & 31) . |
||
| 511 | static::$method( ($b0 << 2) & 31); |
||
| 512 | if ($pad) { |
||
| 513 | $dest .= '======'; |
||
| 514 | } |
||
| 515 | } |
||
| 516 | } |
||
| 517 | return $dest; |
||
| 518 | } |
||
| 519 | } |