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implement simplified translation logic, forcing the use of safe application via jQuery element

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El RIDO 2020-01-25 09:07:06 +01:00
parent aa3f1206b2
commit 62365880b4
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GPG key ID: 0F5C940A6BD81F92
4 changed files with 122 additions and 111 deletions
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80
js/privatebin.js
View file

@ -322,19 +322,12 @@ jQuery.PrivateBin = (function($, RawDeflate) {
let format = args[0],
i = 1;
return format.replace(/%(s|d)/g, function (m) {
// m is the matched format, e.g. %s, %d
let val = args[i];
// A switch statement so that the formatter can be extended.
switch (m)
{
case '%d':
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
break;
default:
// Default is %s
if (m === '%d') {
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
}
++i;
return val;
@ -547,19 +540,23 @@ jQuery.PrivateBin = (function($, RawDeflate) {
/**
* translate a string
*
* Optionally pass a jQuery element as the first parameter, to automatically
* let the text of this element be replaced. In case the (asynchronously
* As the first parameter a jQuery element has to be provided, to let
* the text of this element be replaced. In case the (asynchronously
* loaded) language is not downloadet yet, this will make sure the string
* is replaced when it is actually loaded.
* So for easy translations passing the jQuery object to apply it to is
* more save, especially when they are loaded in the beginning.
* is replaced when it is actually loaded. This also handles HTML in
* secure fashion, to avoid XSS.
* The second parameter is the message ID, matching the ones found in
* the translation files under the i18n directory.
* Any additional parameters will get inserted into the message ID in
* place of %s (strings) or %d (digits), applying the appropriate plural
* in case of digits. See also Helper.sprintf().
*
* @name I18n.translate
* @function
* @param {jQuery} $element - optional
* @param {jQuery} $element
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
* @throws {string}
*/
me.translate = function()
{
@ -573,6 +570,8 @@ jQuery.PrivateBin = (function($, RawDeflate) {
// optional jQuery element as first parameter
$element = args[0];
args.shift();
} else {
throw 'translation requires a jQuery element to be passed, for secure insertion of messages and to avoid double encoding of HTML entities';
}
// extract messageId from arguments
@ -633,10 +632,10 @@ jQuery.PrivateBin = (function($, RawDeflate) {
let containsLinks = args[0].indexOf('<a') !== -1;
// prevent double encoding, when we insert into a text node
if (!containsLinks || $element === null) {
if (!containsLinks) {
for (let i = 0; i < args.length; ++i) {
// parameters (i > 0) may never contain HTML as they may come from untrusted parties
if (i > 0 || !containsLinks) {
if (i > 0) {
args[i] = Helper.htmlEntities(args[i]);
}
}
@ -654,18 +653,37 @@ jQuery.PrivateBin = (function($, RawDeflate) {
);
}
// if $element is given, insert translation
if ($element !== null) {
if (containsLinks) {
$element.html(output);
} else {
// text node takes care of entity encoding
$element.text(output);
}
return '';
if (containsLinks) {
$element.html(output);
} else {
// text node takes care of entity encoding
$element.text(output);
}
};
return output;
/**
* translate a string, outputs the result
*
* This function is identical to I18n.translate, but doesn't require a
* jQuery element as the first parameter, instead it returns the
* translated message as string.
* Avoid using this function, if possible, as it may double encode your
* message's HTML entities. This is done to fail safe, preventing XSS.
*
* @name I18n.translate2string
* @function
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @throws {string}
* @return {string}
*/
me.translate2string = function()
{
let args = Array.prototype.slice.call(arguments),
$element = $('<textarea>');
args.unshift($element);
me.translate.apply(this, args);
return $element.text();
};
/**

149
js/test/I18n.js
View file

@ -8,78 +8,6 @@ describe('I18n', function () {
$.PrivateBin.I18n.reset();
});
jsc.property(
'returns message ID unchanged if no translation found',
'string',
function (messageId) {
messageId = messageId.replace(/%(s|d)/g, '%%');
var plurals = [messageId, messageId + 's'],
fake = [messageId],
result = $.PrivateBin.I18n.translate(messageId);
$.PrivateBin.I18n.reset();
var alias = $.PrivateBin.I18n._(messageId);
$.PrivateBin.I18n.reset();
var pluralResult = $.PrivateBin.I18n.translate(plurals);
$.PrivateBin.I18n.reset();
var pluralAlias = $.PrivateBin.I18n._(plurals);
$.PrivateBin.I18n.reset();
var fakeResult = $.PrivateBin.I18n.translate(fake);
$.PrivateBin.I18n.reset();
var fakeAlias = $.PrivateBin.I18n._(fake);
$.PrivateBin.I18n.reset();
messageId = $.PrivateBin.Helper.htmlEntities(messageId);
return messageId === result && messageId === alias &&
messageId === pluralResult && messageId === pluralAlias &&
messageId === fakeResult && messageId === fakeAlias;
}
);
jsc.property(
'replaces %s in strings with first given parameter, encoding all, when no link is in the messageID',
'string',
'(small nearray) string',
'string',
function (prefix, params, postfix) {
prefix = prefix.replace(/%(s|d)/g, '%%');
params[0] = params[0].replace(/%(s|d)/g, '%%').replace(/<a/g, '');
postfix = postfix.replace(/%(s|d)/g, '%%');
const translation = $.PrivateBin.Helper.htmlEntities(prefix + params[0] + postfix);
params.unshift(prefix + '%s' + postfix);
const result = $.PrivateBin.I18n.translate.apply(this, params);
$.PrivateBin.I18n.reset();
const alias = $.PrivateBin.I18n._.apply(this, params);
$.PrivateBin.I18n.reset();
return translation === result && translation === alias;
}
);
jsc.property(
'replaces %s in strings with first given parameter, encoding params only, when a link is part of the messageID',
'string',
'(small nearray) string',
'string',
function (prefix, params, postfix) {
prefix = prefix.replace(/%(s|d)/g, '%%');
params[0] = params[0].replace(/%(s|d)/g, '%%');
postfix = postfix.replace(/%(s|d)/g, '%%');
const translation = DOMPurify.sanitize(
prefix + $.PrivateBin.Helper.htmlEntities(params[0]) + '<a></a>' + postfix, {
ALLOWED_TAGS: ['a', 'br', 'i', 'span'],
ALLOWED_ATTR: ['href', 'id']
}
);
params.unshift(prefix + '%s<a></a>' + postfix);
const result = $.PrivateBin.I18n.translate.apply(this, params);
$.PrivateBin.I18n.reset();
const alias = $.PrivateBin.I18n._.apply(this, params);
$.PrivateBin.I18n.reset();
return translation === result && translation === alias;
}
);
jsc.property(
'replaces %s in strings with first given parameter into an element, encoding all, when no link is in the messageID',
'string',
@ -144,6 +72,73 @@ describe('I18n', function () {
);
});
describe('translate2string', function () {
this.timeout(30000);
before(function () {
$.PrivateBin.I18n.reset();
});
jsc.property(
'returns message ID unchanged if no translation found',
'string',
function (messageId) {
messageId = messageId.replace(/%(s|d)/g, '%%');
let plurals = [messageId, messageId + 's'],
fake = [messageId],
clean = jsdom(),
result = $.PrivateBin.I18n.translate2string(messageId);
$.PrivateBin.I18n.reset();
var pluralResult = $.PrivateBin.I18n.translate2string(plurals);
$.PrivateBin.I18n.reset();
var fakeResult = $.PrivateBin.I18n.translate2string(fake);
$.PrivateBin.I18n.reset();
clean();
messageId = $.PrivateBin.Helper.htmlEntities(messageId);
return messageId === result && messageId === pluralResult && messageId === fakeResult;
}
);
jsc.property(
'replaces %s in strings with first given parameter, encoding all, when no link is in the messageID',
'string',
'(small nearray) string',
'string',
function (prefix, params, postfix) {
prefix = prefix.replace(/%(s|d)/g, '%%');
params[0] = params[0].replace(/%(s|d)/g, '%%').replace(/<a/g, '');
postfix = postfix.replace(/%(s|d)/g, '%%');
const translation = $.PrivateBin.Helper.htmlEntities(prefix + params[0] + postfix);
params.unshift(prefix + '%s' + postfix);
const result = $.PrivateBin.I18n.translate2string.apply(this, params);
$.PrivateBin.I18n.reset();
return translation === result;
}
);
jsc.property(
'replaces %s in strings with first given parameter, encoding params only, when a link is part of the messageID',
'string',
'(small nearray) string',
'string',
function (prefix, params, postfix) {
prefix = prefix.replace(/%(s|d)/g, '%%');
params[0] = params[0].replace(/%(s|d)/g, '%%');
postfix = postfix.replace(/%(s|d)/g, '%%');
const translation = DOMPurify.sanitize(
prefix + $.PrivateBin.Helper.htmlEntities(params[0]) + '<a></a>' + postfix, {
ALLOWED_TAGS: ['a', 'br', 'i', 'span'],
ALLOWED_ATTR: ['href', 'id']
}
);
params.unshift(prefix + '%s<a></a>' + postfix);
const result = $.PrivateBin.I18n.translate2string.apply(this, params);
$.PrivateBin.I18n.reset();
return translation === result;
}
);
});
describe('getPluralForm', function () {
before(function () {
$.PrivateBin.I18n.reset();
@ -183,10 +178,9 @@ describe('I18n', function () {
// mock
clean = jsdom('', {cookie: ['lang=' + language]});
$.PrivateBin.I18n.reset(language, require('../../i18n/' + language + '.json'));
var result = $.PrivateBin.I18n.translate('en'),
alias = $.PrivateBin.I18n._('en');
var result = $.PrivateBin.I18n.translate2string('en');
clean();
return language === result && language === alias;
return language === result;
}
);
@ -206,11 +200,10 @@ describe('I18n', function () {
$.PrivateBin.I18n.reset('en');
$.PrivateBin.I18n.loadTranslations();
var result = $.PrivateBin.I18n.translate('en'),
alias = $.PrivateBin.I18n._('en');
var result = $.PrivateBin.I18n.translate2string('en');
clean();
return 'en' === result && 'en' === alias;
return 'en' === result;
}
);
});

2
tpl/bootstrap.php
View file

@ -72,7 +72,7 @@ endif;
?>
<script type="text/javascript" data-cfasync="false" src="js/purify-2.0.7.js" integrity="sha512-XjNEK1xwh7SJ/7FouwV4VZcGW9cMySL3SwNpXgrURLBcXXQYtZdqhGoNdEwx9vwLvFjUGDQVNgpOrTsXlSTiQg==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/legacy.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-LYos+qXHIRqFf5ZPNphvtTB0cgzHUizu2wwcOwcwz/VIpRv9lpcBgPYz4uq6jx0INwCAj6Fbnl5HoKiLufS2jg==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-U9Au7V0FSY8S1xI6MrhPawEOFAPFejMI8PYlQNhC++XIQCQgQhYEqTYkhczN6F2MFAq/P1Hwn9A3IWaq9hu95g==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-Pss+4+Yrpp5ZROFKS9VWpX13RUpVp2QXDNZtFzNrr7YV65D+iKKUeE1z/Sff887+3fyOyIhJwKMsdfnmXnaNkQ==" crossorigin="anonymous"></script>
<link rel="apple-touch-icon" href="img/apple-touch-icon.png?<?php echo rawurlencode($VERSION); ?>" sizes="180x180" />
<link rel="icon" type="image/png" href="img/favicon-32x32.png?<?php echo rawurlencode($VERSION); ?>" sizes="32x32" />
<link rel="icon" type="image/png" href="img/favicon-16x16.png?<?php echo rawurlencode($VERSION); ?>" sizes="16x16" />

2
tpl/page.php
View file

@ -50,7 +50,7 @@ endif;
?>
<script type="text/javascript" data-cfasync="false" src="js/purify-2.0.7.js" integrity="sha512-XjNEK1xwh7SJ/7FouwV4VZcGW9cMySL3SwNpXgrURLBcXXQYtZdqhGoNdEwx9vwLvFjUGDQVNgpOrTsXlSTiQg==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/legacy.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-LYos+qXHIRqFf5ZPNphvtTB0cgzHUizu2wwcOwcwz/VIpRv9lpcBgPYz4uq6jx0INwCAj6Fbnl5HoKiLufS2jg==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-U9Au7V0FSY8S1xI6MrhPawEOFAPFejMI8PYlQNhC++XIQCQgQhYEqTYkhczN6F2MFAq/P1Hwn9A3IWaq9hu95g==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-Pss+4+Yrpp5ZROFKS9VWpX13RUpVp2QXDNZtFzNrr7YV65D+iKKUeE1z/Sff887+3fyOyIhJwKMsdfnmXnaNkQ==" crossorigin="anonymous"></script>
<link rel="apple-touch-icon" href="img/apple-touch-icon.png?<?php echo rawurlencode($VERSION); ?>" sizes="180x180" />
<link rel="icon" type="image/png" href="img/favicon-32x32.png?<?php echo rawurlencode($VERSION); ?>" sizes="32x32" />
<link rel="icon" type="image/png" href="img/favicon-16x16.png?<?php echo rawurlencode($VERSION); ?>" sizes="16x16" />