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<?php |
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/* |
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Password Strength Library |
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Copyright (C) 2019 CustomerGauge |
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[email protected] |
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 3 of the License, or (at your option) any later version. |
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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 GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with this program; if not, write to the Free Software Foundation, |
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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*/ |
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declare(strict_types=1); |
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namespace CustomerGauge\Password\Rule; |
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use CustomerGauge\Password\Exception\SequencialNumber as SequencialNumberException; |
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use CustomerGauge\Password\Rule; |
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use function mb_strlen; |
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final class SequencialNumber implements Rule |
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{ |
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public const ASCENDING = 'ASC'; |
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public const DESCENDING = 'DESC'; |
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private int $count; |
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private string $encoding; |
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public function __construct(int $count = 3, string $encoding = 'utf8') |
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{ |
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$this->count = $count; |
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$this->encoding = $encoding; |
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} |
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public function __invoke(string $password): void |
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{ |
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$length = (int) mb_strlen($password, $this->encoding); |
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$this->find($password, $length, self::ASCENDING); |
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$this->find($password, $length, self::DESCENDING); |
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} |
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private function find(string $password, int $length, string $direction): void |
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{ |
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$chained = 1; |
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for ($i = 1; $i < $length; $i++) { |
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$current = (int) $password[$i]; |
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$previous = (int) $password[$i - 1]; |
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$direction === self::ASCENDING ? $previous++ : $previous--; |
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$current === $previous ? $chained++ : $chained = 1; |
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if ($chained === $this->count) { |
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throw SequencialNumberException::notAllowed(); |
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} |
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} |
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1 |
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} |
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} |
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cgauge /
password-strength-lib
