mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
378 lines
13 KiB
C++
378 lines
13 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsContentBlocker.h"
|
|
#include "nsIContent.h"
|
|
#include "nsIURI.h"
|
|
#include "nsIServiceManager.h"
|
|
#include "nsIDocShellTreeItem.h"
|
|
#include "nsIPrefService.h"
|
|
#include "nsIPrefBranch.h"
|
|
#include "nsIDocShell.h"
|
|
#include "nsString.h"
|
|
#include "nsContentPolicyUtils.h"
|
|
#include "nsIObjectLoadingContent.h"
|
|
#include "mozilla/ArrayUtils.h"
|
|
#include "nsContentUtils.h"
|
|
|
|
// Possible behavior pref values
|
|
// Those map to the nsIPermissionManager values where possible
|
|
#define BEHAVIOR_ACCEPT nsIPermissionManager::ALLOW_ACTION
|
|
#define BEHAVIOR_REJECT nsIPermissionManager::DENY_ACTION
|
|
#define BEHAVIOR_NOFOREIGN 3
|
|
|
|
// From nsIContentPolicy
|
|
static const char *kTypeString[] = {
|
|
"other",
|
|
"script",
|
|
"image",
|
|
"stylesheet",
|
|
"object",
|
|
"document",
|
|
"subdocument",
|
|
"refresh",
|
|
"xbl",
|
|
"ping",
|
|
"xmlhttprequest",
|
|
"objectsubrequest",
|
|
"dtd",
|
|
"font",
|
|
"media",
|
|
"websocket",
|
|
"csp_report",
|
|
"xslt",
|
|
"beacon",
|
|
"fetch",
|
|
"imageset",
|
|
"manifest",
|
|
"", // TYPE_INTERNAL_SCRIPT
|
|
"", // TYPE_INTERNAL_WORKER
|
|
"", // TYPE_INTERNAL_SHARED_WORKER
|
|
"", // TYPE_INTERNAL_EMBED
|
|
"", // TYPE_INTERNAL_OBJECT
|
|
"", // TYPE_INTERNAL_FRAME
|
|
"", // TYPE_INTERNAL_IFRAME
|
|
"", // TYPE_INTERNAL_AUDIO
|
|
"", // TYPE_INTERNAL_VIDEO
|
|
"", // TYPE_INTERNAL_TRACK
|
|
"", // TYPE_INTERNAL_XMLHTTPREQUEST
|
|
"", // TYPE_INTERNAL_EVENTSOURCE
|
|
"", // TYPE_INTERNAL_SERVICE_WORKER
|
|
};
|
|
|
|
#define NUMBER_OF_TYPES MOZ_ARRAY_LENGTH(kTypeString)
|
|
uint8_t nsContentBlocker::mBehaviorPref[NUMBER_OF_TYPES];
|
|
|
|
NS_IMPL_ISUPPORTS(nsContentBlocker,
|
|
nsIContentPolicy,
|
|
nsIObserver,
|
|
nsISupportsWeakReference)
|
|
|
|
nsContentBlocker::nsContentBlocker()
|
|
{
|
|
memset(mBehaviorPref, BEHAVIOR_ACCEPT, NUMBER_OF_TYPES);
|
|
}
|
|
|
|
nsresult
|
|
nsContentBlocker::Init()
|
|
{
|
|
nsresult rv;
|
|
mPermissionManager = do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIPrefService> prefService = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIPrefBranch> prefBranch;
|
|
rv = prefService->GetBranch("permissions.default.", getter_AddRefs(prefBranch));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Migrate old image blocker pref
|
|
nsCOMPtr<nsIPrefBranch> oldPrefBranch;
|
|
oldPrefBranch = do_QueryInterface(prefService);
|
|
int32_t oldPref;
|
|
rv = oldPrefBranch->GetIntPref("network.image.imageBehavior", &oldPref);
|
|
if (NS_SUCCEEDED(rv) && oldPref) {
|
|
int32_t newPref;
|
|
switch (oldPref) {
|
|
default:
|
|
newPref = BEHAVIOR_ACCEPT;
|
|
break;
|
|
case 1:
|
|
newPref = BEHAVIOR_NOFOREIGN;
|
|
break;
|
|
case 2:
|
|
newPref = BEHAVIOR_REJECT;
|
|
break;
|
|
}
|
|
prefBranch->SetIntPref("image", newPref);
|
|
oldPrefBranch->ClearUserPref("network.image.imageBehavior");
|
|
}
|
|
|
|
|
|
// The branch is not a copy of the prefservice, but a new object, because
|
|
// it is a non-default branch. Adding obeservers to it will only work if
|
|
// we make sure that the object doesn't die. So, keep a reference to it.
|
|
mPrefBranchInternal = do_QueryInterface(prefBranch, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = mPrefBranchInternal->AddObserver("", this, true);
|
|
PrefChanged(prefBranch, nullptr);
|
|
|
|
return rv;
|
|
}
|
|
|
|
#undef LIMIT
|
|
#define LIMIT(x, low, high, default) ((x) >= (low) && (x) <= (high) ? (x) : (default))
|
|
|
|
void
|
|
nsContentBlocker::PrefChanged(nsIPrefBranch *aPrefBranch,
|
|
const char *aPref)
|
|
{
|
|
int32_t val;
|
|
|
|
#define PREF_CHANGED(_P) (!aPref || !strcmp(aPref, _P))
|
|
|
|
for(uint32_t i = 0; i < NUMBER_OF_TYPES; ++i) {
|
|
if (*kTypeString[i] &&
|
|
PREF_CHANGED(kTypeString[i]) &&
|
|
NS_SUCCEEDED(aPrefBranch->GetIntPref(kTypeString[i], &val)))
|
|
mBehaviorPref[i] = LIMIT(val, 1, 3, 1);
|
|
}
|
|
|
|
}
|
|
|
|
// nsIContentPolicy Implementation
|
|
NS_IMETHODIMP
|
|
nsContentBlocker::ShouldLoad(uint32_t aContentType,
|
|
nsIURI *aContentLocation,
|
|
nsIURI *aRequestingLocation,
|
|
nsISupports *aRequestingContext,
|
|
const nsACString &aMimeGuess,
|
|
nsISupports *aExtra,
|
|
nsIPrincipal *aRequestPrincipal,
|
|
int16_t *aDecision)
|
|
{
|
|
MOZ_ASSERT(aContentType == nsContentUtils::InternalContentPolicyTypeToExternal(aContentType),
|
|
"We should only see external content policy types here.");
|
|
|
|
*aDecision = nsIContentPolicy::ACCEPT;
|
|
nsresult rv;
|
|
|
|
// Ony support NUMBER_OF_TYPES content types. that all there is at the
|
|
// moment, but you never know...
|
|
if (aContentType > NUMBER_OF_TYPES)
|
|
return NS_OK;
|
|
|
|
// we can't do anything without this
|
|
if (!aContentLocation)
|
|
return NS_OK;
|
|
|
|
// The final type of an object tag may mutate before it reaches
|
|
// shouldProcess, so we cannot make any sane blocking decisions here
|
|
if (aContentType == nsIContentPolicy::TYPE_OBJECT)
|
|
return NS_OK;
|
|
|
|
// we only want to check http, https, ftp
|
|
// for chrome:// and resources and others, no need to check.
|
|
nsAutoCString scheme;
|
|
aContentLocation->GetScheme(scheme);
|
|
if (!scheme.LowerCaseEqualsLiteral("ftp") &&
|
|
!scheme.LowerCaseEqualsLiteral("http") &&
|
|
!scheme.LowerCaseEqualsLiteral("https"))
|
|
return NS_OK;
|
|
|
|
bool shouldLoad, fromPrefs;
|
|
rv = TestPermission(aContentLocation, aRequestingLocation, aContentType,
|
|
&shouldLoad, &fromPrefs);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!shouldLoad) {
|
|
if (fromPrefs) {
|
|
*aDecision = nsIContentPolicy::REJECT_TYPE;
|
|
} else {
|
|
*aDecision = nsIContentPolicy::REJECT_SERVER;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsContentBlocker::ShouldProcess(uint32_t aContentType,
|
|
nsIURI *aContentLocation,
|
|
nsIURI *aRequestingLocation,
|
|
nsISupports *aRequestingContext,
|
|
const nsACString &aMimeGuess,
|
|
nsISupports *aExtra,
|
|
nsIPrincipal *aRequestPrincipal,
|
|
int16_t *aDecision)
|
|
{
|
|
MOZ_ASSERT(aContentType == nsContentUtils::InternalContentPolicyTypeToExternal(aContentType),
|
|
"We should only see external content policy types here.");
|
|
|
|
// For loads where aRequestingContext is chrome, we should just
|
|
// accept. Those are most likely toplevel loads in windows, and
|
|
// chrome generally knows what it's doing anyway.
|
|
nsCOMPtr<nsIDocShellTreeItem> item =
|
|
do_QueryInterface(NS_CP_GetDocShellFromContext(aRequestingContext));
|
|
|
|
if (item && item->ItemType() == nsIDocShellTreeItem::typeChrome) {
|
|
*aDecision = nsIContentPolicy::ACCEPT;
|
|
return NS_OK;
|
|
}
|
|
|
|
// For objects, we only check policy in shouldProcess, as the final type isn't
|
|
// determined until the channel is open -- We don't want to block images in
|
|
// object tags because plugins are disallowed.
|
|
// NOTE that this bypasses the aContentLocation checks in ShouldLoad - this is
|
|
// intentional, as aContentLocation may be null for plugins that load by type
|
|
// (e.g. java)
|
|
if (aContentType == nsIContentPolicy::TYPE_OBJECT) {
|
|
*aDecision = nsIContentPolicy::ACCEPT;
|
|
|
|
bool shouldLoad, fromPrefs;
|
|
nsresult rv = TestPermission(aContentLocation, aRequestingLocation,
|
|
aContentType, &shouldLoad, &fromPrefs);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!shouldLoad) {
|
|
if (fromPrefs) {
|
|
*aDecision = nsIContentPolicy::REJECT_TYPE;
|
|
} else {
|
|
*aDecision = nsIContentPolicy::REJECT_SERVER;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// This isn't a load from chrome or an object tag - Just do a ShouldLoad()
|
|
// check -- we want the same answer here
|
|
return ShouldLoad(aContentType, aContentLocation, aRequestingLocation,
|
|
aRequestingContext, aMimeGuess, aExtra, aRequestPrincipal,
|
|
aDecision);
|
|
}
|
|
|
|
nsresult
|
|
nsContentBlocker::TestPermission(nsIURI *aCurrentURI,
|
|
nsIURI *aFirstURI,
|
|
int32_t aContentType,
|
|
bool *aPermission,
|
|
bool *aFromPrefs)
|
|
{
|
|
*aFromPrefs = false;
|
|
|
|
if (!*kTypeString[aContentType - 1]) {
|
|
// Disallow internal content policy types, they should not be used here.
|
|
*aPermission = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
// This default will also get used if there is an unknown value in the
|
|
// permission list, or if the permission manager returns unknown values.
|
|
*aPermission = true;
|
|
|
|
// check the permission list first; if we find an entry, it overrides
|
|
// default prefs.
|
|
// Don't forget the aContentType ranges from 1..8, while the
|
|
// array is indexed 0..7
|
|
uint32_t permission;
|
|
nsresult rv = mPermissionManager->TestPermission(aCurrentURI,
|
|
kTypeString[aContentType - 1],
|
|
&permission);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If there is nothing on the list, use the default.
|
|
if (!permission) {
|
|
permission = mBehaviorPref[aContentType - 1];
|
|
*aFromPrefs = true;
|
|
}
|
|
|
|
// Use the fact that the nsIPermissionManager values map to
|
|
// the BEHAVIOR_* values above.
|
|
switch (permission) {
|
|
case BEHAVIOR_ACCEPT:
|
|
*aPermission = true;
|
|
break;
|
|
case BEHAVIOR_REJECT:
|
|
*aPermission = false;
|
|
break;
|
|
|
|
case BEHAVIOR_NOFOREIGN:
|
|
// Third party checking
|
|
|
|
// Need a requesting uri for third party checks to work.
|
|
if (!aFirstURI)
|
|
return NS_OK;
|
|
|
|
bool trustedSource = false;
|
|
rv = aFirstURI->SchemeIs("chrome", &trustedSource);
|
|
NS_ENSURE_SUCCESS(rv,rv);
|
|
if (!trustedSource) {
|
|
rv = aFirstURI->SchemeIs("resource", &trustedSource);
|
|
NS_ENSURE_SUCCESS(rv,rv);
|
|
}
|
|
if (trustedSource)
|
|
return NS_OK;
|
|
|
|
// compare tails of names checking to see if they have a common domain
|
|
// we do this by comparing the tails of both names where each tail
|
|
// includes at least one dot
|
|
|
|
// A more generic method somewhere would be nice
|
|
|
|
nsAutoCString currentHost;
|
|
rv = aCurrentURI->GetAsciiHost(currentHost);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Search for two dots, starting at the end.
|
|
// If there are no two dots found, ++dot will turn to zero,
|
|
// that will return the entire string.
|
|
int32_t dot = currentHost.RFindChar('.');
|
|
dot = currentHost.RFindChar('.', dot-1);
|
|
++dot;
|
|
|
|
// Get the domain, ie the last part of the host (www.domain.com -> domain.com)
|
|
// This will break on co.uk
|
|
const nsCSubstring &tail =
|
|
Substring(currentHost, dot, currentHost.Length() - dot);
|
|
|
|
nsAutoCString firstHost;
|
|
rv = aFirstURI->GetAsciiHost(firstHost);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If the tail is longer then the whole firstHost, it will never match
|
|
if (firstHost.Length() < tail.Length()) {
|
|
*aPermission = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get the last part of the firstUri with the same length as |tail|
|
|
const nsCSubstring &firstTail =
|
|
Substring(firstHost, firstHost.Length() - tail.Length(), tail.Length());
|
|
|
|
// Check that both tails are the same, and that just before the tail in
|
|
// |firstUri| there is a dot. That means both url are in the same domain
|
|
if ((firstHost.Length() > tail.Length() &&
|
|
firstHost.CharAt(firstHost.Length() - tail.Length() - 1) != '.') ||
|
|
!tail.Equals(firstTail)) {
|
|
*aPermission = false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsContentBlocker::Observe(nsISupports *aSubject,
|
|
const char *aTopic,
|
|
const char16_t *aData)
|
|
{
|
|
NS_ASSERTION(!strcmp(NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, aTopic),
|
|
"unexpected topic - we only deal with pref changes!");
|
|
|
|
if (mPrefBranchInternal)
|
|
PrefChanged(mPrefBranchInternal, NS_LossyConvertUTF16toASCII(aData).get());
|
|
return NS_OK;
|
|
}
|