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Bug 777196 - Prevent non-chrome processes from accessing the content preferences. r=mak

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This commit is contained in:
Gabriele Svelto 2013-07-30 09:58:44 +02:00
parent 1f62ec34ec
commit ead1c88069
8 changed files with 15 additions and 274 deletions
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12
toolkit/components/contentprefs/ContentPrefService2.jsm
View File

@ -196,7 +196,7 @@ ContentPrefService2.prototype = {
this._pbStore.set(group, name, value);
this._schedule(function () {
cbHandleCompletion(callback, Ci.nsIContentPrefCallback2.COMPLETE_OK);
this._cps._broadcastPrefSet(group, name, value);
this._cps._notifyPrefSet(group, name, value);
});
return;
}
@ -266,7 +266,7 @@ ContentPrefService2.prototype = {
this._cache.setWithCast(group, name, value);
cbHandleCompletion(callback, reason);
if (ok)
this._cps._broadcastPrefSet(group, name, value);
this._cps._notifyPrefSet(group, name, value);
},
onError: function onError(nsresult) {
cbHandleError(callback, nsresult);
@ -356,7 +356,7 @@ ContentPrefService2.prototype = {
cbHandleCompletion(callback, reason);
if (ok) {
for (let [sgroup, , ] in prefs) {
this._cps._broadcastPrefRemoved(sgroup, name);
this._cps._notifyPrefRemoved(sgroup, name);
}
}
},
@ -448,7 +448,7 @@ ContentPrefService2.prototype = {
cbHandleCompletion(callback, reason);
if (ok) {
for (let [sgroup, sname, ] in prefs) {
this._cps._broadcastPrefRemoved(sgroup, sname);
this._cps._notifyPrefRemoved(sgroup, sname);
}
}
},
@ -505,7 +505,7 @@ ContentPrefService2.prototype = {
cbHandleCompletion(callback, reason);
if (ok) {
for (let [sgroup, sname, ] in prefs) {
this._cps._broadcastPrefRemoved(sgroup, sname);
this._cps._notifyPrefRemoved(sgroup, sname);
}
}
},
@ -585,7 +585,7 @@ ContentPrefService2.prototype = {
cbHandleCompletion(callback, reason);
if (ok) {
for (let [sgroup, , ] in prefs) {
this._cps._broadcastPrefRemoved(sgroup, name);
this._cps._notifyPrefRemoved(sgroup, name);
}
}
},

133
toolkit/components/contentprefs/nsContentPrefService.js
View File

@ -9,25 +9,6 @@ const Cu = Components.utils;
const CACHE_MAX_GROUP_ENTRIES = 100;
// We have a whitelist for getting/setting. This is because
// there are potential privacy issues with a compromised
// content process checking the user's content preferences
// and using that to discover all the websites visited, etc.
// Also there are both potential race conditions (if two processes
// set more than one value in succession, and the values
// only make sense together), as well as security issues, if
// a compromised content process can send arbitrary setPref
// messages. The whitelist contains only those settings that
// are not at risk for either.
// We currently whitelist saving/reading the last directory of file
// uploads, and the last current spellchecker dictionary which are so far
// the only need we have identified.
const REMOTE_WHITELIST = [
"browser.upload.lastDir",
"spellcheck.lang",
];
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
/**
@ -41,75 +22,11 @@ function electrolify(service) {
service.wrappedJSObject = service;
var appInfo = Cc["@mozilla.org/xre/app-info;1"];
if (!appInfo || appInfo.getService(Ci.nsIXULRuntime).processType ==
Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT) {
// Parent process
service.messageManager = Cc["@mozilla.org/parentprocessmessagemanager;1"].
getService(Ci.nsIMessageBroadcaster);
// Setup listener for child messages. We don't need to call
// addMessageListener as the wakeup service will do that for us.
service.receiveMessage = function(aMessage) {
var json = aMessage.json;
if (REMOTE_WHITELIST.indexOf(json.name) == -1)
return { succeeded: false };
switch (aMessage.name) {
case "ContentPref:getPref":
return { succeeded: true,
value: service.getPref(json.group, json.name, json.value) };
case "ContentPref:setPref":
service.setPref(json.group, json.name, json.value);
return { succeeded: true };
}
};
} else {
if (appInfo && appInfo.getService(Ci.nsIXULRuntime).processType !=
Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT)
{
// Child process
service._dbInit = function(){}; // No local DB
service.messageManager = Cc["@mozilla.org/childprocessmessagemanager;1"].
getService(Ci.nsISyncMessageSender);
// Child method remoting
[
['getPref', ['group', 'name'], ['_parseGroupParam']],
['setPref', ['group', 'name', 'value'], ['_parseGroupParam']],
].forEach(function(data) {
var method = data[0];
var params = data[1];
var parsers = data[2];
service[method] = function __remoted__() {
var json = {};
for (var i = 0; i < params.length; i++) {
if (params[i]) {
json[params[i]] = arguments[i];
if (parsers[i])
json[params[i]] = this[parsers[i]](json[params[i]]);
}
}
var ret = service.messageManager.sendSyncMessage('ContentPref:' + method, json)[0];
if (!ret.succeeded)
throw "ContentPrefs remoting failed to pass whitelist";
return ret.value;
};
});
// Listen to preference change notifications from the parent and notify
// observers in the child process according to the change
service.messageManager.addMessageListener("ContentPref:notifyPrefSet",
function(aMessage) {
var json = aMessage.json;
service._notifyPrefSet(json.group, json.name, json.value);
});
service.messageManager.addMessageListener("ContentPref:notifyPrefRemoved",
function(aMessage) {
var json = aMessage.json;
service._notifyPrefRemoved(json.group, json.name);
});
}
}
@ -350,7 +267,7 @@ ContentPrefService.prototype = {
if (aContext && aContext.usePrivateBrowsing) {
this._privModeStorage.setWithCast(group, aName, aValue);
this._broadcastPrefSet(group, aName, aValue);
this._notifyPrefSet(group, aName, aValue);
return;
}
@ -372,7 +289,7 @@ ContentPrefService.prototype = {
this._insertPref(groupID, settingID, aValue);
this._cache.setWithCast(group, aName, aValue);
this._broadcastPrefSet(group, aName, aValue);
this._notifyPrefSet(group, aName, aValue);
},
hasPref: function ContentPrefService_hasPref(aGroup, aName, aContext) {
@ -400,7 +317,7 @@ ContentPrefService.prototype = {
if (aContext && aContext.usePrivateBrowsing) {
this._privModeStorage.remove(group, aName);
this._broadcastPrefRemoved(group, aName);
this._notifyPrefRemoved(group, aName);
return;
}
@ -423,7 +340,7 @@ ContentPrefService.prototype = {
this._deleteGroupIfUnused(groupID);
this._cache.remove(group, aName);
this._broadcastPrefRemoved(group, aName);
this._notifyPrefRemoved(group, aName);
},
removeGroupedPrefs: function ContentPrefService_removeGroupedPrefs(aContext) {
@ -458,7 +375,7 @@ ContentPrefService.prototype = {
for (let [group, name, ] in this._privModeStorage) {
if (name === aName) {
this._privModeStorage.remove(group, aName);
this._broadcastPrefRemoved(group, aName);
this._notifyPrefRemoved(group, aName);
}
}
}
@ -500,7 +417,7 @@ ContentPrefService.prototype = {
if (groupNames[i]) // ie. not null, which will be last (and i == groupIDs.length)
this._deleteGroupIfUnused(groupIDs[i]);
if (!aContext || !aContext.usePrivateBrowsing) {
this._broadcastPrefRemoved(groupNames[i], aName);
this._notifyPrefRemoved(groupNames[i], aName);
}
}
},
@ -619,38 +536,6 @@ ContentPrefService.prototype = {
}
},
/**
* Notify all observers in the current process about the removal of a
* preference and send a message to all other processes so that they can in
* turn notify their observers about the change. This is meant to be called
* only in the parent process. Only whitelisted preferences are broadcast to
* the child processes.
*/
_broadcastPrefRemoved: function ContentPrefService__broadcastPrefRemoved(aGroup, aName) {
this._notifyPrefRemoved(aGroup, aName);
if (REMOTE_WHITELIST.indexOf(aName) != -1) {
this.messageManager.broadcastAsyncMessage('ContentPref:notifyPrefRemoved',
{ "group": aGroup, "name": aName } );
}
},
/**
* Notify all observers in the current process about a preference change and
* send a message to all other processes so that they can in turn notify
* their observers about the change. This is meant to be called only in the
* parent process. Only whitelisted preferences are broadcast to the child
* processes.
*/
_broadcastPrefSet: function ContentPrefService__broadcastPrefSet(aGroup, aName, aValue) {
this._notifyPrefSet(aGroup, aName, aValue);
if (REMOTE_WHITELIST.indexOf(aName) != -1) {
this.messageManager.broadcastAsyncMessage('ContentPref:notifyPrefSet',
{ "group": aGroup, "name": aName, "value": aValue } );
}
},
_grouper: null,
get grouper() {
if (!this._grouper)

4
toolkit/components/contentprefs/tests/moz.build
View File

@ -7,7 +7,3 @@
MODULE = 'test_toolkit_contentprefs'
XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini', 'unit_cps2/xpcshell.ini']
# FIXME/bug 575918: out-of-process xpcshell is broken on OS X
if CONFIG['OS_ARCH'] != 'Darwin':
XPCSHELL_TESTS_MANIFESTS += ['unit_ipc/xpcshell.ini']

39
toolkit/components/contentprefs/tests/unit_ipc/contentPrefs_childipc.js
View File

@ -1,39 +0,0 @@
function run_test() {
do_check_true(inChildProcess(), "test harness should never call us directly");
var cps = Cc["@mozilla.org/content-pref/service;1"].
createInstance(Ci.nsIContentPrefService);
// Cannot get general values
try {
cps.getPref("group", "name")
do_check_false(true, "Must have thrown exception on getting general value");
}
catch(e) { }
// Cannot set general values
try {
cps.setPref("group", "name", "someValue2");
do_check_false(true, "Must have thrown exception on setting general value");
}
catch(e) { }
// Can set&get whitelisted values
cps.setPref("group", "browser.upload.lastDir", "childValue", null);
do_check_eq(cps.getPref("group", "browser.upload.lastDir", null), "childValue");
// Test sending URI
var ioSvc = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
var uri = ioSvc.newURI("http://mozilla.org", null, null);
cps.setPref(uri, "browser.upload.lastDir", "childValue2", null);
do_check_eq(cps.getPref(uri, "browser.upload.lastDir", null), "childValue2");
// Previous value
do_check_eq(cps.getPref("group", "browser.upload.lastDir", null), "childValue");
// Tell parent to finish and clean up
cps.wrappedJSObject.messageManager.sendSyncMessage('ContentPref:QUIT');
}

5
toolkit/components/contentprefs/tests/unit_ipc/head_contentPrefs.js
View File

@ -1,5 +0,0 @@
// initializing profile here because do_get_profile cannot be called
// from a content process
do_get_profile();
load("../unit/head_contentPrefs.js");

3
toolkit/components/contentprefs/tests/unit_ipc/tail_contentPrefs.js
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@ -1,3 +0,0 @@
load("../unit/tail_contentPrefs.js");

88
toolkit/components/contentprefs/tests/unit_ipc/test_contentPrefs_parentipc.js
View File

@ -1,88 +0,0 @@
function run_test() {
// Check received messages
var cps = Cc["@mozilla.org/content-pref/service;1"].
createInstance(Ci.nsIContentPrefService).
wrappedJSObject;
var messageHandler = cps;
// FIXME: For now, use the wrappedJSObject hack, until bug
// 593407 which will clean that up. After that, use
// the commented out line below it.
messageHandler = cps.wrappedJSObject;
//messageHandler = cps.QueryInterface(Ci.nsIMessageListener);
// Cannot get values
do_check_false(messageHandler.receiveMessage({
name: "ContentPref:getPref",
json: { group: 'group2', name: 'name' } }).succeeded);
// Cannot set general values
messageHandler.receiveMessage({ name: "ContentPref:setPref",
json: { group: 'group2', name: 'name', value: 'someValue' } });
do_check_eq(cps.getPref('group', 'name', null), undefined);
// Can set whitelisted values
do_check_true(messageHandler.receiveMessage({ name: "ContentPref:setPref",
json: { group: 'group2', name: 'browser.upload.lastDir',
value: 'someValue' } }).succeeded);
do_check_eq(cps.getPref('group2', 'browser.upload.lastDir', null), 'someValue');
// Prepare for child tests
// Manually listen to messages - the wakeup manager should do this
// for us, but it doesn't run in xpcshell tests.
var messageProxy = {
receiveMessage: function(aMessage) {
if (aMessage.name == 'ContentPref:QUIT') {
// Undo mock storage.
delete cps._mockStorage;
delete cps._messageProxy;
cps.setPref = cps.old_setPref;
cps.getPref = cps.old_getPref;
cps._dbInit = cps.old__dbInit;
// Unlisten to messages
mM.removeMessageListener("ContentPref:setPref", messageProxy);
mM.removeMessageListener("ContentPref:getPref", messageProxy);
mM.removeMessageListener("ContentPref:QUIT", messageProxy);
do_test_finished();
return true;
} else {
return messageHandler.receiveMessage(aMessage);
}
},
};
var mM = Cc["@mozilla.org/parentprocessmessagemanager;1"].
getService(Ci.nsIMessageListenerManager);
mM.addMessageListener("ContentPref:setPref", messageProxy);
mM.addMessageListener("ContentPref:getPref", messageProxy);
mM.addMessageListener("ContentPref:QUIT", messageProxy);
// Mock storage. This is necessary because
// the IPC xpcshell setup doesn't do well with the normal storage
// engine.
cps = cps.wrappedJSObject;
cps._mockStorage = {};
cps.old_setPref = cps.setPref;
cps.setPref = function(aGroup, aName, aValue) {
this._mockStorage[aGroup+':'+aName] = aValue;
}
cps.old_getPref = cps.getPref;
cps.getPref = function(aGroup, aName) {
return this._mockStorage[aGroup+':'+aName];
}
cps.old__dbInit = cps._dbInit;
cps._dbInit = function(){};
cps._messageProxy = messageProxy; // keep it alive
do_test_pending();
run_test_in_child("contentPrefs_childipc.js");
}

5
toolkit/components/contentprefs/tests/unit_ipc/xpcshell.ini
View File

@ -1,5 +0,0 @@
[DEFAULT]
head = head_contentPrefs.js
tail = tail_contentPrefs.js
[test_contentPrefs_parentipc.js]