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Protect against a malicious setDatabase. Remove unneeded save data.

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This commit is contained in:
Brendan Dahl 2012-02-06 21:04:53 -08:00
parent 7a17676b06
commit 9a1741f466
2 changed files with 5 additions and 4 deletions
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5
extensions/firefox/components/PdfStreamConverter.js
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@ -48,6 +48,9 @@ ChromeActions.prototype = {
setDatabase: function(data) {
if (this.inPrivateBrowswing)
return;
// Protect against something sending tons of data to setDatabase.
if (data.length > 4096)
return;
application.prefs.setValue(EXT_PREFIX + '.database', data);
},
getDatabase: function() {
@ -142,7 +145,7 @@ PdfStreamConverter.prototype = {
// Setup a global listener waiting for the next DOM to be created and verfiy
// that its the one we want by its URL. When the correct DOM is found create
// an event listener on that window for the pdf.js events that require
// chrome priviledges.
// chrome priviledges. Code snippet from John Galt.
let window = aRequest.loadGroup.groupObserver
.QueryInterface(Ci.nsIWebProgress)
.DOMWindow;

4
web/viewer.js
View file

@ -109,7 +109,7 @@ var Settings = (function SettingsClosure() {
var database = null;
var index;
if (isFirefoxExtension)
database = FirefoxCom.request('getDatabase', null);
database = FirefoxCom.request('getDatabase', null) || '{}';
else if (isLocalStorageEnabled)
database = localStorage.getItem('database') || '{}';
else
@ -131,8 +131,6 @@ var Settings = (function SettingsClosure() {
index = database.files.push({fingerprint: fingerprint}) - 1;
this.file = database.files[index];
this.database = database;
if (isLocalStorageEnabled)
localStorage.setItem('database', JSON.stringify(database));
}
Settings.prototype = {