/**
* @inheritdoc
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
$secret = $input->getArgument('secret');
if (empty($secret)) {
/** @var QuestionHelper $dialog */
$helper = $this->getHelper('question');
$question = new Question('<question>The secret to share</question>: ');
$secret = $helper->ask($input, $output, $question);
$question = new Question('<question>Number of shared secrets to create</question> <comment>[3]</comment>: ', 3);
$question->setValidator(function ($a) {
if (!is_int($a) && !ctype_digit($a)) {
throw new \Exception('The number of shared secrets must be an integer');
}
return (int) $a;
});
$shares = $helper->ask($input, $output, $question);
$question = new Question('<question>Number of shared secrets required</question> <comment>[2]</comment>: ', 2);
$question->setValidator(function ($a) {
if (!is_int($a) && !ctype_digit($a)) {
throw new \Exception('The number of shared secrets required must be an integer');
}
return (int) $a;
});
$threshold = $helper->ask($input, $output, $question);
} else {
$shares = $input->getOption('shares');
$threshold = $input->getOption('threshold');
}
$shared = Secret::share($secret, $shares, $threshold);
/** @var FormatterHelper $formatter */
$formatter = $this->getHelper('formatter');
$block = $formatter->formatBlock($shared, 'info', true);
$output->writeln($block);
}
/**
* @inheritdoc
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
/** @var array $shares */
$shares = $input->getArgument('shares');
if (empty($shares)) {
/** @var QuestionHelper $dialog */
$helper = $this->getHelper('question');
$question = new Question('<question>Shared secret</question> <comment>[empty to stop]</comment>: ');
$shares = [];
while (($share = trim($helper->ask($input, $output, $question))) != '') {
$shares[] = $share;
}
}
$shared = Secret::recover($shares);
/** @var FormatterHelper $formatter */
$formatter = $this->getHelper('formatter');
$block = $formatter->formatBlock($shared, 'info', true);
$output->writeln($block);
}
#!/usr/bin/env php
<?php
require_once __DIR__ . '/../vendor/autoload.php';
use TQ\Shamir\Secret;
// create 5 shares with a threshold of 2, so you will need a minimum
// of 2 shares to recover the secret.
$shares = Secret::share('Shamir\'s Shared Secret Implementation in PHP', 5, 2);
var_dump($shares);
// we can use different keys to recover the data, but we need at least 2 of them
var_dump(Secret::recover(array_slice($shares, 0, 2)));
var_dump(Secret::recover(array_slice($shares, 1, 2)));
if (!isset($fieldValue) || trim($fieldValue) == '') {
throw new \Exception('All of the fields are required.');
}
}
if (!filter_var($sharesThreshold, FILTER_VALIDATE_INT) || !filter_var($sharesAmount, FILTER_VALIDATE_INT)) {
throw new \Exception('The threshold and amount of shares must be integers.');
}
if ($sharesThreshold > $sharesAmount) {
throw new \Exception('The threshold must be lower than or equal to the amount of shares.');
}
$status = 'success';
$response = Secret::share($secret, $sharesAmount, $sharesThreshold);
} catch (Exception $exception) {
$status = 'error';
$response = $exception->getMessage();
}
}
// Recover
if ($action === 'recover') {
$shares = $request->input('shares');
try {
$status = 'success';
$response = Secret::recover(array_filter($shares));
} catch (Exception $exception) {
$status = 'error';
$response = $exception->getMessage();
}
}
// Return response
return view('index', ['version' => $app->version(), 'action' => $action, 'status' => empty($status) ? null : $status, 'response' => json_encode($response), 'shareAmount' => empty($sharesAmount) ? null : $sharesAmount, 'shareThreshold' => empty($sharesThreshold) ? null : $sharesThreshold]);
});
public function testShareAndRecoverThreeBytes()
{
$secret = 'abc ABC 123 !@# ,./ \'"\\ <>?';
$shares = Secret::share($secret, 75000, 2);
$recover = Secret::recover(array_slice($shares, 0, 2));
$this->assertSame($secret, $recover);
}
