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6dd0169873
Summary: - Original command is in SSH_ORIGINAL_COMMAND, not normal argv. - Use PhutilShellLexer to parse it. - Fix a protocol encoding issue with ConduitSSHWorkflow. I think I'm going to make this protocol accept multiple commands anyway because SSH pipes are crazy expensive to build (even locally, they're ~300ms). Test Plan: With other changes, successfully executed "arc list --conduit-uri=ssh://localhost:2222". Reviewers: btrahan, vrana Reviewed By: btrahan CC: aran Maniphest Tasks: T550 Differential Revision: https://secure.phabricator.com/D4232
91 lines
2.4 KiB
PHP
Executable file
91 lines
2.4 KiB
PHP
Executable file
#!/usr/bin/env php
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<?php
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$root = dirname(dirname(dirname(__FILE__)));
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require_once $root.'/scripts/__init_script__.php';
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$original_command = getenv('SSH_ORIGINAL_COMMAND');
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$original_argv = id(new PhutilShellLexer())->splitArguments($original_command);
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$argv = array_merge($argv, $original_argv);
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$args = new PhutilArgumentParser($argv);
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$args->setTagline('receive SSH requests');
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$args->setSynopsis(<<<EOSYNOPSIS
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**ssh-exec** --phabricator-ssh-user __user__ __commmand__ [__options__]
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Receive SSH requests.
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EOSYNOPSIS
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);
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// NOTE: Do NOT parse standard arguments. Arguments are coming from a remote
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// client over SSH, and they should not be able to execute "--xprofile",
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// "--recon", etc.
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$args->parsePartial(
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array(
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array(
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'name' => 'phabricator-ssh-user',
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'param' => 'username',
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),
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));
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try {
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$user_name = $args->getArg('phabricator-ssh-user');
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if (!strlen($user_name)) {
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throw new Exception("No username.");
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}
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$user = id(new PhabricatorUser())->loadOneWhere(
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'userName = %s',
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$user_name);
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if (!$user) {
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throw new Exception("Invalid username.");
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}
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if ($user->getIsDisabled()) {
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throw new Exception("You have been exiled.");
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}
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$workflows = array(
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new ConduitSSHWorkflow(),
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);
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// This duplicates logic in parseWorkflows(), but allows us to raise more
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// concise/relevant exceptions when the client is a remote SSH.
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$remain = $args->getUnconsumedArgumentVector();
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if (empty($remain)) {
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throw new Exception("No interactive logins.");
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} else {
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$command = head($remain);
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$workflow_names = mpull($workflows, 'getName', 'getName');
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if (empty($workflow_names[$command])) {
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throw new Exception("Invalid command.");
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}
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}
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$workflow = $args->parseWorkflows($workflows);
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$workflow->setUser($user);
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$sock_stdin = fopen('php://stdin', 'r');
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if (!$sock_stdin) {
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throw new Exception("Unable to open stdin.");
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}
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$sock_stdout = fopen('php://stdout', 'w');
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if (!$sock_stdout) {
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throw new Exception("Unable to open stdout.");
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}
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$socket_channel = new PhutilSocketChannel(
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$sock_stdin,
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$sock_stdout);
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$metrics_channel = new PhutilMetricsChannel($socket_channel);
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$workflow->setIOChannel($metrics_channel);
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$err = $workflow->execute($args);
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$metrics_channel->flush();
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} catch (Exception $ex) {
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echo "phabricator-ssh-exec: ".$ex->getMessage()."\n";
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exit(1);
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}
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