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<?php |
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namespace Riimu\Kit\SecureRandom\Generator; |
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use Riimu\Kit\SecureRandom\GeneratorException; |
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/** |
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* Generates bytes and numbers using PHP's built in CSPRNG. |
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* |
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* PHP7 offers a built in function for generating cryptographically secure |
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* random bytes. This class simply wraps that method for supported PHP versions. |
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* |
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* @author Riikka Kalliomäki <[email protected]> |
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* @copyright Copyright (c) 2015-2017 Riikka Kalliomäki |
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* @license http://opensource.org/licenses/mit-license.php MIT License |
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*/ |
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class Internal extends AbstractGenerator implements NumberGenerator |
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{ |
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public function isSupported() |
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{ |
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return version_compare(PHP_VERSION, '7.0') >= 0; |
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} |
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protected function readBytes($count) |
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{ |
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return random_bytes($count); |
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} |
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public function getNumber($min, $max) |
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{ |
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$min = (int) $min; |
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$max = (int) $max; |
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$exception = null; |
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try { |
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$number = random_int($min, $max); |
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} catch (\Throwable $exception) { |
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$number = false; |
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} |
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if (!$this->isValidResult($number, $min, $max)) { |
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throw new GeneratorException('Error generating random number', 0, $exception); |
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} |
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return $number; |
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} |
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/** |
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* Tells if the generated number is a valid result. |
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* @param int $number The number to test |
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* @param int $min The minimum value for the number |
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* @param int $max The maximum value for the number |
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* @return bool True if the number is a valid result, false if not |
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*/ |
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private function isValidResult($number, $min, $max) |
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{ |
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return is_int($number) && $number >= $min && $number <= $max; |
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} |
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} |
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Riimu /
Kit-SecureRandom
