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<?php |
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/** |
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* Linna Framework. |
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* |
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* @author Sebastian Rapetti <[email protected]> |
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* @copyright (c) 2018, Sebastian Rapetti |
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* @license http://opensource.org/licenses/MIT MIT License |
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*/ |
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declare(strict_types=1); |
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namespace Linna\Authentication; |
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use InvalidArgumentException; |
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/** |
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* Generate random password with random topology, this class use php7 |
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* random_int() function for generate random numbers. |
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*/ |
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class PasswordGenerator |
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{ |
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/** |
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* @var array Characters intervall utf8 dec rappresentation |
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*/ |
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private $chars = [ |
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[[65, 90]], //u 117 |
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[[97, 122]], //l 108 |
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[[48, 57]], //d 100 |
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[[33, 47], [58, 64], [91, 96], [123, 126]], //s 115 |
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]; |
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/** |
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* Generate a random password. |
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* <pre><code class="php">use Linna\Auth\PasswordGenerator; |
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* |
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* $passwordGenerator = new PasswordGenerator(); |
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* $random = $passwordGenerator->getFromRandom(20); |
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* |
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* //var_dump result |
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* //r4Q,1J*tM7D_99q0u>61 |
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* var_dump($random); |
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* </code></pre> |
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* |
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* @param int $length Desiderated password length. |
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* @return string Random password. |
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*/ |
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public function getFromRandom(int $length): string |
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{ |
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$password = []; |
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while ($length) { |
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$password[] = $this->getRandomChar($this->chars[random_int(0, 3)]); |
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$length--; |
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} |
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return implode($password); |
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} |
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/** |
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* Return topology for given password. |
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* <pre><code class="php">use Linna\Auth\PasswordGenerator; |
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* |
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* $passwordGenerator = new PasswordGenerator(); |
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* $topology = $passwordGenerator->getTopology('r4Q,1J*tM7D_99q0u>61'); |
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* |
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* //var_dump result |
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* //ldusdusludusddldlsdd |
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* var_dump($topology); |
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* </code></pre> |
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* @param string $password Password. |
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* |
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* @return string Topology for the argument passed password. |
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*/ |
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public function getTopology(string $password): string |
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{ |
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$array = str_split($password); |
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$topology = []; |
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foreach ($array as $char) { |
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$topology[] = $this->getTopologyGroup($char); |
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} |
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return implode($topology); |
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} |
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/** |
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* Return topology group for the given char. |
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* |
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* @param string $char |
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* |
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* @return string |
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*/ |
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private function getTopologyGroup(string $char) : string |
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{ |
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$int = ord($char); |
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$groups = ['u', 'l', 'd', 's']; |
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foreach ($groups as $key => $group) { |
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if ($this->inRanges($int, $this->chars[$key])) { |
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return $group; |
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} |
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} |
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} |
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/** |
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* Generate a random password corresponding at the given topology. |
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* <pre><code class="php">use Linna\Auth\PasswordGenerator; |
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* |
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* $passwordGenerator = new PasswordGenerator(); |
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* $random = $passwordGenerator->getFromTopology('ldusdusludusddldlsdd'); |
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* |
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* //var_dump result |
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* //r4Q,1J*tM7D_99q0u>61 |
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* var_dump($random); |
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* </code></pre> |
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* |
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* @param string $topology Topology for generate password. |
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* @return string Random password corresponding the given topology. |
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* |
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* @throws InvalidArgumentException If invalid pattern is provided. |
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*/ |
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public function getFromTopology(string $topology): string |
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{ |
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$array = str_split(strtolower($topology)); |
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$groups = [117 => 0, 108 => 1, 100 => 2, 115 => 3]; |
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$password = []; |
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foreach ($array as $char) { |
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$int = ord($char); |
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if (isset($groups[$int])) { |
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$password[] = $this->getRandomChar($this->chars[$groups[$int]]); |
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continue; |
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} |
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throw new InvalidArgumentException('Invalid pattern provided, accepted only u, l, d and s'); |
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} |
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return implode($password); |
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} |
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/** |
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* Get random char between. |
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* |
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* @param array $interval |
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* @return string |
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*/ |
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private function getRandomChar(array $interval): string |
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{ |
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do { |
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$int = random_int(33, 122); |
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if ($this->inRanges($int, $interval)) { |
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break; |
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} |
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} while (true); |
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return chr($int); |
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} |
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/** |
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* Check if value is between given range. |
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* |
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* @param mixed $value |
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* @param array $ranges |
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* |
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* @return bool |
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*/ |
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private function inRanges($value, array $ranges): bool |
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{ |
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foreach ($ranges as $range) { |
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if ($value >= $range[0] && $value <= $range[1]) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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linna /
framework
