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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function() {
/**
* CSS classes for different statuses.
* @enum {string}
*/
const StatusClass = {
GOOD: 'good',
BAD: 'bad',
MEDIUM: 'medium',
INFO: 'info'
};
/**
* Adds a row to the sandbox status table.
* @param {string} name The name of the status item.
* @param {string} value The status of the item.
* @param {string?} cssClass A CSS class to apply to the row.
* @return {Element} The newly added TR.
*/
function addStatusRow(name, value, cssClass) {
const row = cr.doc.createElement('tr');
const nameCol = row.appendChild(cr.doc.createElement('td'));
const valueCol = row.appendChild(cr.doc.createElement('td'));
nameCol.textContent = name;
valueCol.textContent = value;
if (cssClass != null) {
nameCol.classList.add(cssClass);
valueCol.classList.add(cssClass);
}
$('sandbox-status').appendChild(row);
return row;
}
/**
* Adds a status row that reports either Yes or No.
* @param {string} name The name of the status item.
* @param {boolean} result The status (good/bad) result.
* @return {Element} The newly added TR.
*/
function addGoodBadRow(name, result) {
return addStatusRow(
name, result ? 'Yes' : 'No', result ? StatusClass.GOOD : StatusClass.BAD);
}
/**
* Reports the overall sandbox status evaluation message.
* @param {boolean}
*/
function setEvaluation(result) {
const message = result ? 'You are adequately sandboxed.' :
'You are NOT adequately sandboxed.';
$('evaluation').innerText = message;
}
/**
* Main page handler for Android.
*/
function androidHandler() {
chrome.getAndroidSandboxStatus((status) => {
let isIsolated = false;
let isTsync = false;
let isChromeSeccomp = false;
addStatusRow('PID', status.pid, StatusClass.INFO);
addStatusRow('UID', status.uid, StatusClass.INFO);
isIsolated = status.secontext.indexOf(':isolated_app:') != -1;
addStatusRow(
'SELinux Context', status.secontext,
isIsolated ? StatusClass.GOOD : StatusClass.BAD);
const procStatus = status.procStatus.split('\n');
for (const line of procStatus) {
if (line.startsWith('Seccomp')) {
let value = line.split(':')[1].trim();
let cssClass = StatusClass.BAD;
if (value == '2') {
value = 'Yes - TSYNC (' + line + ')';
cssClass = StatusClass.GOOD;
isTsync = true;
} else if (value == '1') {
value = 'Yes (' + line + ')';
} else {
value = line;
}
addStatusRow('Seccomp-BPF Enabled (Kernel)', value, cssClass);
break;
}
}
let seccompStatus = 'Unknown';
switch (status.seccompStatus) {
case 0:
seccompStatus = 'Not Supported';
break;
case 1:
seccompStatus = 'Run-time Detection Failed';
break;
case 2:
seccompStatus = 'Disabled by Field Trial';
break;
case 3:
seccompStatus = 'Enabled by Field Trial (not started)';
break;
case 4:
seccompStatus = 'Sandbox Started';
isChromeSeccomp = true;
break;
}
addStatusRow(
'Seccomp-BPF Enabled (Chrome)', seccompStatus,
status.seccompStatus == 4 ? StatusClass.GOOD : StatusClass.BAD);
addStatusRow('Android Build ID', status.androidBuildId, StatusClass.INFO);
setEvaluation(isIsolated && isTsync && isChromeSeccomp);
});
}
/**
* Main page handler for desktop Linux.
*/
function linuxHandler() {
const suidSandbox = loadTimeData.getBoolean('suid');
const nsSandbox = loadTimeData.getBoolean('userNs');
let layer1SandboxType = 'None';
let layer1SandboxCssClass = StatusClass.BAD;
if (suidSandbox) {
layer1SandboxType = 'SUID';
layer1SandboxCssClass = StatusClass.MEDIUM;
} else if (nsSandbox) {
layer1SandboxType = 'Namespace';
layer1SandboxCssClass = StatusClass.GOOD;
}
addStatusRow('Layer 1 Sandbox', layer1SandboxType, layer1SandboxCssClass);
addGoodBadRow('PID namespaces', loadTimeData.getBoolean('pidNs'));
addGoodBadRow('Network namespaces', loadTimeData.getBoolean('netNs'));
addGoodBadRow('Seccomp-BPF sandbox', loadTimeData.getBoolean('seccompBpf'));
addGoodBadRow(
'Seccomp-BPF sandbox supports TSYNC',
loadTimeData.getBoolean('seccompTsync'));
const enforcingYamaBroker = loadTimeData.getBoolean('yamaBroker');
addGoodBadRow(
'Ptrace Protection with Yama LSM (Broker)', enforcingYamaBroker);
const enforcingYamaNonbroker = loadTimeData.getBoolean('yamaNonbroker');
// If there is no ptrace protection anywhere, that is bad.
// If there is no ptrace protection for nonbroker processes because of the
// user namespace sandbox, that is fine and we display as medium.
const yamaNonbrokerCssClass = enforcingYamaBroker ?
(enforcingYamaNonbroker ? StatusClass.GOOD : StatusClass.MEDIUM) :
StatusClass.BAD;
addStatusRow(
'Ptrace Protection with Yama LSM (Non-broker)',
enforcingYamaNonbroker ? 'Yes' : 'No', yamaNonbrokerCssClass);
setEvaluation(loadTimeData.getBoolean('sandboxGood'));
}
document.addEventListener('DOMContentLoaded', () => {
if (cr.isAndroid) {
androidHandler();
} else {
linuxHandler();
}
});
})();
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