217 lines
9.7 KiB
PHP
217 lines
9.7 KiB
PHP
<?php
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/**
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* Expert INI editor for /etc/mmdvmhost.
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*
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* Renders a per-section / per-key form built from parse_ini_file()
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* output, accepts edits via POST, then writes the result back to
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* /etc/mmdvmhost using the standard Pi-Star copy-via-/tmp pattern:
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* 1. sudo cp /etc/mmdvmhost /tmp/<obfuscated>.tmp + chown www-data
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* + chmod 600 (so PHP can edit the temp).
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* 2. fopen('w') and fwrite the rebuilt INI text into the temp.
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* 3. sudo mount -o remount,rw / + sudo install -m 644 -o root -g
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* root temp -> /etc/mmdvmhost + sudo mount -o remount,ro / to
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* seal the rootfs again. (L-5: collapses the prior cp + chmod +
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* chown triplet into one atomic call — same idiom used by
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* configure.php's gateway-save block. The triplet would also
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* be rejected by the tightened /etc/sudoers.d/pistar-dashboard
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* because it allowlists install but not bare cp+chmod+chown
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* against /etc/<gateway>.)
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* 4. sudo systemctl restart mmdvmhost.service to pick up the change.
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*
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* Admin-only access; the dashboard's Apache basic-auth gate is the
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* sole protection. The validation is what's in the form (none, in
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* effect — operator-typed values are written raw). Treat with care.
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*/
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require_once($_SERVER['DOCUMENT_ROOT'].'/config/security_headers.php');
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require_once($_SERVER['DOCUMENT_ROOT'].'/config/csrf.php');
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require_once($_SERVER['DOCUMENT_ROOT'].'/config/banner_warnings.inc');
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setSecurityHeaders();
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// CSRF protection — see config/csrf.php for the full rationale.
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// Must run BEFORE any output: bootstraps the session on GET (so
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// Set-Cookie ships) and rejects forged POSTs cleanly with 403
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// before any state change (sed-i, fopen+fwrite, sudo cp, etc.).
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csrf_verify();
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// Layer 2 of the default-password protection — see config/banner_warnings.inc.
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// MUST run BEFORE any output so header('Location: ...') works.
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pistar_warnings_enforce_redirect();
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// Load the language support
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require_once('../config/language.php');
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//Load the Pi-Star Release file
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$pistarReleaseConfig = '/etc/pistar-release';
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$configPistarRelease = array();
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$configPistarRelease = parse_ini_file($pistarReleaseConfig, true);
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//Load the Version Info
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require_once('../config/version.php');
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?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" lang="en">
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<head>
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<meta name="robots" content="index" />
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<meta name="robots" content="follow" />
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<meta name="language" content="English" />
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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<meta name="Author" content="Andrew Taylor (MW0MWZ)" />
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<meta name="Description" content="Pi-Star Expert Editor" />
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<meta name="KeyWords" content="Pi-Star" />
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<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
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<meta http-equiv="pragma" content="no-cache" />
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<link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon">
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<meta http-equiv="Expires" content="0" />
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<title>Pi-Star - Digital Voice Dashboard - Expert Editor</title>
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<link rel="stylesheet" type="text/css" href="../css/pistar-css.php" />
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</head>
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<body>
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<?php pistar_warnings_render(); ?>
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<div class="container">
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<?php include './header-menu.inc'; ?>
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<div class="contentwide">
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<?php
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//Do some file wrangling...
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// A3-3 — see edit_ircddbgateway.php for the full TOCTOU rationale.
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// tempnam() creates the staging file mode 600 owned by www-data
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// with an unguessable random suffix.
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$filepath = tempnam('/tmp', 'pistar-edit-');
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exec('sudo cp /etc/mmdvmhost ' . escapeshellarg($filepath));
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exec('sudo chown www-data:www-data ' . escapeshellarg($filepath));
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exec('sudo chmod 600 ' . escapeshellarg($filepath));
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// Clean up the /tmp staging file on script exit so the
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// editor's potentially-secrets-bearing copy of /etc/<config>
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// doesn't persist between requests. @-suppression handles
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// the case where a sudo mv (e.g. fulledit_bmapikey) already
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// consumed the staging file before script end.
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register_shutdown_function(function() use ($filepath) { @unlink($filepath); });
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//after the form submit
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if($_POST) {
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$data = $_POST;
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//update ini file, call function
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update_ini_file($data, $filepath);
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}
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//this is the function going to update your ini file
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function update_ini_file($data, $filepath)
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{
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$content = "";
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//parse the ini file to get the sections
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//parse the ini file using default parse_ini_file() PHP function
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$parsed_ini = parse_ini_file($filepath, true);
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foreach($data as $section=>$values) {
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// UnBreak special cases
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$section = str_replace("_", " ", $section);
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$content .= "[".$section."]\n";
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//append the values
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foreach($values as $key=>$value) {
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if ($section == "DMR Network" && $key == "Password" && $value) {
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$value = str_replace('"', "", $value);
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$content .= $key."=\"".$value."\"\n";
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}
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elseif ($section == "DMR Network" && $key == "Options" && $value) {
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$value = str_replace('"', "", $value);
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$content .= $key."=\"".$value."\"\n";
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}
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elseif ($section == "DMR Network" && $key == "Options" && !$value) {
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$content .= $key."= \n";
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}
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elseif ($value == '') {
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$content .= $key."=none\n";
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}
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else {
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$content .= $key."=".$value."\n";
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}
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}
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$content .= "\n";
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}
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//write it into file
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if (!$handle = fopen($filepath, 'w')) {
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return false;
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}
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$success = fwrite($handle, $content);
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fclose($handle);
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// Updates complete - install the working file back to the
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// proper location. L-5: atomic install replaces the prior
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// cp + chmod + chown triplet (which the tightened
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// /etc/sudoers.d/pistar-dashboard rejects on the bare
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// chmod/chown against /etc/<file> — only the install pattern
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// is allowlisted there).
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exec('sudo mount -o remount,rw /');
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exec('sudo install -m 644 -o root -g root '
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. escapeshellarg($filepath) . ' /etc/mmdvmhost');
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exec('sudo mount -o remount,ro /');
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// Reload the affected daemon
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exec('sudo systemctl restart mmdvmhost.service'); // Reload the daemon
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return $success;
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}
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//parse the ini file using default parse_ini_file() PHP function
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$parsed_ini = parse_ini_file($filepath, true);
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echo '<form action="" method="post">'."\n";
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echo csrf_field_html()."\n";
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foreach($parsed_ini as $section=>$values) {
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// INI section / key / value all come from /etc/mmdvmhost.
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// Operator-trusted in principle, but the M-3 audit class
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// means a value with a literal `"` or `<` (legitimate INI
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// content — e.g. "Options=foo=1,bar" or a callsign with a
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// space) breaks out of `value="…"` attributes and renders
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// as HTML.
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//
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// htmlspecialchars(ENT_QUOTES) preserves round-trip safety:
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// on display: `"` -> `"`, `<` -> `<` etc.
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// browser decode (form parse): `"` -> `"` again.
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// POST: the raw byte gets back to the save handler.
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// save handler at line ~108: writes `key=value` to INI
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// verbatim — no further escaping or unescaping.
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// So values like `Options="foo=1,bar"` go in, get displayed
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// as `Options="foo=1,bar"`, the browser still shows
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// `"foo=1,bar"` in the input field, and re-saving produces
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// a byte-identical INI line.
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$sectionHtml = htmlspecialchars((string)$section, ENT_QUOTES, 'UTF-8');
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// keep the section as hidden text so we can update once the form submitted
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echo "<input type=\"hidden\" value=\"$sectionHtml\" name=\"$sectionHtml\" />\n";
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echo "<table>\n";
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echo "<tr><th colspan=\"2\">$sectionHtml</th></tr>\n";
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// print all other values as input fields, so can edit.
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// note the name='' attribute it has both section and key
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foreach($values as $key=>$value) {
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$keyHtml = htmlspecialchars((string)$key, ENT_QUOTES, 'UTF-8');
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$valueHtml = htmlspecialchars((string)$value, ENT_QUOTES, 'UTF-8');
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if (($key == "Options") || ($value)) {
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echo "<tr><td align=\"right\" width=\"30%\">$keyHtml</td><td align=\"left\"><input type=\"text\" name=\"{$sectionHtml}[$keyHtml]\" value=\"$valueHtml\" /></td></tr>\n";
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}
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elseif (($key == "Display") && ($value == '')) {
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echo "<tr><td align=\"right\" width=\"30%\">$keyHtml</td><td align=\"left\"><input type=\"text\" name=\"{$sectionHtml}[$keyHtml]\" value=\"None\" /></td></tr>\n";
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}
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else {
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echo "<tr><td align=\"right\" width=\"30%\">$keyHtml</td><td align=\"left\"><input type=\"text\" name=\"{$sectionHtml}[$keyHtml]\" value=\"0\" /></td></tr>\n";
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}
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}
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echo "</table>\n";
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echo '<input type="submit" value="'.$lang['apply'].'" />'."\n";
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echo "<br />\n";
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}
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echo "</form>";
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?>
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</div>
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<div class="footer">
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Pi-Star / Pi-Star Dashboard, © Andy Taylor (MW0MWZ) 2014-<?php echo date("Y"); ?>.<br />
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Need help? Click <a style="color: #ffffff;" href="https://www.facebook.com/groups/pistarusergroup/" target="_new">here for the Support Group</a><br />
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Get your copy of Pi-Star from <a style="color: #ffffff;" href="http://www.pistar.uk/downloads/" target="_new">here</a>.<br />
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</div>
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</div>
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</body>
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</html>
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