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<?php |
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namespace TQ\Shamir\Console; |
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use Symfony\Component\Console\Command\Command; |
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use Symfony\Component\Console\Helper\FormatterHelper; |
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use Symfony\Component\Console\Helper\QuestionHelper; |
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use Symfony\Component\Console\Input\InputArgument; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Input\InputOption; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Question\Question; |
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use TQ\Shamir\Secret; |
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use UnexpectedValueException; |
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class ShareCommand extends Command |
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{ |
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/** |
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* @inheritdoc |
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*/ |
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protected function configure(): void |
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{ |
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$this->setName('shamir:share')->setDescription('Create a shared secret')->addArgument( |
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'secret', |
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InputArgument::OPTIONAL, |
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'The secret to share' |
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)->addOption( |
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'file', |
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'f', |
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InputOption::VALUE_OPTIONAL, |
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'File containing secret' |
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)->addOption( |
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'shares', |
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's', |
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InputOption::VALUE_OPTIONAL, |
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'The number of shared secrets to generate', |
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3 |
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)->addOption( |
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'threshold', |
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't', |
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InputOption::VALUE_OPTIONAL, |
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'The minimum number of shared secrets required to recover', |
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2 |
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); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function execute(InputInterface $input, OutputInterface $output): int |
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{ |
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$secret = $this->readFile($input, $output); |
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if ($secret === null) { |
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$secret = $input->getArgument('secret'); |
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} |
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if (empty($secret)) { |
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/** @var QuestionHelper $dialog */ |
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$helper = $this->getHelper('question'); |
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$question = new Question('<question>The secret to share</question>: '); |
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$secret = $helper->ask($input, $output, $question); |
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$question = new Question( |
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'<question>Number of shared secrets to create</question> <comment>[3]</comment>: ', 3 |
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); |
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$question->setValidator( |
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static function ($a) { |
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if (!is_int($a) && !ctype_digit($a)) { |
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throw new UnexpectedValueException('The number of shared secrets must be an integer'); |
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} |
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return (int)$a; |
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} |
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); |
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$shares = $helper->ask($input, $output, $question); |
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$question = new Question( |
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'<question>Number of shared secrets required</question> <comment>[2]</comment>: ', 2 |
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); |
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$question->setValidator( |
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function ($a) { |
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if (!is_int($a) && !ctype_digit($a)) { |
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throw new UnexpectedValueException('The number of shared secrets required must be an integer'); |
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} |
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return (int)$a; |
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} |
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); |
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$threshold = $helper->ask($input, $output, $question); |
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} else { |
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$shares = $input->getOption('shares'); |
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$threshold = $input->getOption('threshold'); |
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} |
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$shared = Secret::share($secret, $shares, $threshold); |
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/** @var FormatterHelper $formatter */ |
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$formatter = $this->getHelper('formatter'); |
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$block = $formatter->formatBlock($shared, 'info'); |
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$output->writeln($block); |
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return 0; |
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} |
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/** |
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* Check STDIN or file option for input of secret |
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*/ |
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protected function readFile(InputInterface $input, OutputInterface $output): ?string |
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{ |
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$secret = null; |
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$file = $input->getOption('file'); |
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if ($file !== null) { |
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# check for secret in file |
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if (!is_readable($file)) { |
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$output->writeln('<error>ERROR: file "'.$file.'" is not readable.'); |
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exit(1); |
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} |
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$secret = file_get_contents($file); |
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} else { |
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# check if data is given by STDIN |
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$readStreams = [STDIN]; |
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$writeStreams = []; |
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$exceptStreams = []; |
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$streamCount = stream_select($readStreams, $writeStreams, $exceptStreams, 0); |
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if ($streamCount === 1) { |
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while (!feof(STDIN)) { |
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$secret .= fread(STDIN, 1024); |
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} |
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} |
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} |
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return $secret; |
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} |
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} |
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teqneers /
shamir
In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.