64 lines
1.8 KiB
PHP
64 lines
1.8 KiB
PHP
<?php
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/**
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* Nextcloud - user_sql
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*
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* @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
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* @author Marcin Łojewski <dev@mlojewski.me>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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namespace OCA\UserSQL\Crypto;
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/**
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* Cryptographic utilities.
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*
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* @author Marcin Łojewski <dev@mlojewski.me>
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*/
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final class Utils
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{
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/**
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* Convert hexadecimal message to its base64 form.
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*
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* @param $hex string The hexadecimal encoded message.
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*
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* @return string The same message encoded in base64.
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*/
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public static function hexToBase64($hex)
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{
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$hexChr = "";
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foreach (str_split($hex, 2) as $hexPair) {
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$hexChr .= chr(hexdec($hexPair));
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}
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return base64_encode($hexChr);
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}
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/**
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* Generate random string from given alphabet.
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*
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* @param $length int The output string length.
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* @param $alphabet string The output string alphabet.
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*
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* @return string Random string from given alphabet.
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*/
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public static function randomString($length, $alphabet)
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{
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$string = "";
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for ($idx = 0; $idx != $length; ++$idx) {
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$string .= $alphabet[random_int(0, strlen($alphabet) - 1)];
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}
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return $string;
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}
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}
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