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gecko-dev/extensions/cookie/nsCookiePermission.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:ts=2:sw=2:et: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is cookie manager code.
*
* The Initial Developer of the Original Code is
* Michiel van Leeuwen (mvl@exedo.nl).
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
* Daniel Witte <dwitte@stanford.edu>
* Ehsan Akhgari <ehsan.akhgari@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCookiePermission.h"
#include "nsICookie2.h"
#include "nsIServiceManager.h"
#include "nsICookiePromptService.h"
#include "nsICookieManager2.h"
#include "nsNetUtil.h"
#include "nsIURI.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIPrefBranch2.h"
#include "nsIDocShell.h"
#include "nsIWebNavigation.h"
#include "nsIChannel.h"
#include "nsIDOMWindow.h"
#include "nsIDOMDocument.h"
#include "nsIPrincipal.h"
#include "nsString.h"
#include "nsCRT.h"
#include "nsILoadContext.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsNetCID.h"
/****************************************************************
************************ nsCookiePermission ********************
****************************************************************/
// values for mCookiesLifetimePolicy
// 0 == accept normally
// 1 == ask before accepting
// 2 == downgrade to session
// 3 == limit lifetime to N days
static const PRUint32 ACCEPT_NORMALLY = 0;
static const PRUint32 ASK_BEFORE_ACCEPT = 1;
static const PRUint32 ACCEPT_SESSION = 2;
static const PRUint32 ACCEPT_FOR_N_DAYS = 3;
static const PRBool kDefaultPolicy = PR_TRUE;
static const char kCookiesLifetimePolicy[] = "network.cookie.lifetimePolicy";
static const char kCookiesLifetimeDays[] = "network.cookie.lifetime.days";
static const char kCookiesAlwaysAcceptSession[] = "network.cookie.alwaysAcceptSessionCookies";
#ifdef MOZ_MAIL_NEWS
static const char kCookiesDisabledForMailNews[] = "network.cookie.disableCookieForMailNews";
#endif
static const char kCookiesPrefsMigrated[] = "network.cookie.prefsMigrated";
// obsolete pref names for migration
static const char kCookiesLifetimeEnabled[] = "network.cookie.lifetime.enabled";
static const char kCookiesLifetimeBehavior[] = "network.cookie.lifetime.behavior";
static const char kCookiesAskPermission[] = "network.cookie.warnAboutCookies";
static const char kPermissionType[] = "cookie";
#ifdef MOZ_MAIL_NEWS
// returns PR_TRUE if URI appears to be the URI of a mailnews protocol
// XXXbz this should be a protocol flag, not a scheme list, dammit!
static PRBool
IsFromMailNews(nsIURI *aURI)
{
static const char *kMailNewsProtocols[] =
{ "imap", "news", "snews", "mailbox", nsnull };
PRBool result;
for (const char **p = kMailNewsProtocols; *p; ++p) {
if (NS_SUCCEEDED(aURI->SchemeIs(*p, &result)) && result)
return PR_TRUE;
}
return PR_FALSE;
}
#endif
NS_IMPL_ISUPPORTS2(nsCookiePermission,
nsICookiePermission,
nsIObserver)
nsresult
nsCookiePermission::Init()
{
nsresult rv;
mPermMgr = do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
// failure to access the pref service is non-fatal...
nsCOMPtr<nsIPrefBranch2> prefBranch =
do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefBranch) {
prefBranch->AddObserver(kCookiesLifetimePolicy, this, PR_FALSE);
prefBranch->AddObserver(kCookiesLifetimeDays, this, PR_FALSE);
prefBranch->AddObserver(kCookiesAlwaysAcceptSession, this, PR_FALSE);
#ifdef MOZ_MAIL_NEWS
prefBranch->AddObserver(kCookiesDisabledForMailNews, this, PR_FALSE);
#endif
PrefChanged(prefBranch, nsnull);
// migration code for original cookie prefs
PRBool migrated;
rv = prefBranch->GetBoolPref(kCookiesPrefsMigrated, &migrated);
if (NS_FAILED(rv) || !migrated) {
PRBool warnAboutCookies = PR_FALSE;
prefBranch->GetBoolPref(kCookiesAskPermission, &warnAboutCookies);
// if the user is using ask before accepting, we'll use that
if (warnAboutCookies)
prefBranch->SetIntPref(kCookiesLifetimePolicy, ASK_BEFORE_ACCEPT);
PRBool lifetimeEnabled = PR_FALSE;
prefBranch->GetBoolPref(kCookiesLifetimeEnabled, &lifetimeEnabled);
// if they're limiting lifetime and not using the prompts, use the
// appropriate limited lifetime pref
if (lifetimeEnabled && !warnAboutCookies) {
PRInt32 lifetimeBehavior;
prefBranch->GetIntPref(kCookiesLifetimeBehavior, &lifetimeBehavior);
if (lifetimeBehavior)
prefBranch->SetIntPref(kCookiesLifetimePolicy, ACCEPT_FOR_N_DAYS);
else
prefBranch->SetIntPref(kCookiesLifetimePolicy, ACCEPT_SESSION);
}
prefBranch->SetBoolPref(kCookiesPrefsMigrated, PR_TRUE);
}
}
return NS_OK;
}
void
nsCookiePermission::PrefChanged(nsIPrefBranch *aPrefBranch,
const char *aPref)
{
PRInt32 val;
#define PREF_CHANGED(_P) (!aPref || !strcmp(aPref, _P))
if (PREF_CHANGED(kCookiesLifetimePolicy) &&
NS_SUCCEEDED(aPrefBranch->GetIntPref(kCookiesLifetimePolicy, &val)))
mCookiesLifetimePolicy = val;
if (PREF_CHANGED(kCookiesLifetimeDays) &&
NS_SUCCEEDED(aPrefBranch->GetIntPref(kCookiesLifetimeDays, &val)))
// save cookie lifetime in seconds instead of days
mCookiesLifetimeSec = val * 24 * 60 * 60;
if (PREF_CHANGED(kCookiesAlwaysAcceptSession) &&
NS_SUCCEEDED(aPrefBranch->GetBoolPref(kCookiesAlwaysAcceptSession, &val)))
mCookiesAlwaysAcceptSession = val;
#ifdef MOZ_MAIL_NEWS
if (PREF_CHANGED(kCookiesDisabledForMailNews) &&
NS_SUCCEEDED(aPrefBranch->GetBoolPref(kCookiesDisabledForMailNews, &val)))
mCookiesDisabledForMailNews = val;
#endif
}
NS_IMETHODIMP
nsCookiePermission::SetAccess(nsIURI *aURI,
nsCookieAccess aAccess)
{
//
// NOTE: nsCookieAccess values conveniently match up with
// the permission codes used by nsIPermissionManager.
// this is nice because it avoids conversion code.
//
return mPermMgr->Add(aURI, kPermissionType, aAccess);
}
NS_IMETHODIMP
nsCookiePermission::CanAccess(nsIURI *aURI,
nsIChannel *aChannel,
nsCookieAccess *aResult)
{
#ifdef MOZ_MAIL_NEWS
// disable cookies in mailnews if user's prefs say so
if (mCookiesDisabledForMailNews) {
//
// try to examine the "app type" of the window owning this request. if it
// or some ancestor is of type APP_TYPE_MAIL, then assume this URI is being
// loaded from within mailnews.
PRBool isMail = PR_FALSE;
if (aChannel) {
nsCOMPtr<nsILoadContext> ctx;
NS_QueryNotificationCallbacks(aChannel, ctx);
if (ctx) {
PRBool temp;
isMail =
NS_FAILED(ctx->IsAppOfType(nsIDocShell::APP_TYPE_MAIL, &temp)) ||
temp;
}
}
if (isMail || IsFromMailNews(aURI)) {
*aResult = ACCESS_DENY;
return NS_OK;
}
}
#endif // MOZ_MAIL_NEWS
// finally, check with permission manager...
nsresult rv = mPermMgr->TestPermission(aURI, kPermissionType, (PRUint32 *) aResult);
if (NS_SUCCEEDED(rv)) {
switch (*aResult) {
// if we have one of the publicly-available values, just return it
case nsIPermissionManager::UNKNOWN_ACTION: // ACCESS_DEFAULT
case nsIPermissionManager::ALLOW_ACTION: // ACCESS_ALLOW
case nsIPermissionManager::DENY_ACTION: // ACCESS_DENY
break;
// ACCESS_SESSION means the cookie can be accepted; the session
// downgrade will occur in CanSetCookie().
case nsICookiePermission::ACCESS_SESSION:
*aResult = ACCESS_ALLOW;
break;
// ack, an unknown type! just use the defaults.
default:
*aResult = ACCESS_DEFAULT;
}
}
return rv;
}
NS_IMETHODIMP
nsCookiePermission::CanSetCookie(nsIURI *aURI,
nsIChannel *aChannel,
nsICookie2 *aCookie,
PRBool *aIsSession,
PRInt64 *aExpiry,
PRBool *aResult)
{
NS_ASSERTION(aURI, "null uri");
*aResult = kDefaultPolicy;
PRUint32 perm;
mPermMgr->TestPermission(aURI, kPermissionType, &perm);
switch (perm) {
case nsICookiePermission::ACCESS_SESSION:
*aIsSession = PR_TRUE;
case nsIPermissionManager::ALLOW_ACTION: // ACCESS_ALLOW
*aResult = PR_TRUE;
break;
case nsIPermissionManager::DENY_ACTION: // ACCESS_DENY
*aResult = PR_FALSE;
break;
default:
// the permission manager has nothing to say about this cookie -
// so, we apply the default prefs to it.
NS_ASSERTION(perm == nsIPermissionManager::UNKNOWN_ACTION, "unknown permission");
// now we need to figure out what type of accept policy we're dealing with
// if we accept cookies normally, just bail and return
if (mCookiesLifetimePolicy == ACCEPT_NORMALLY) {
*aResult = PR_TRUE;
return NS_OK;
}
// declare this here since it'll be used in all of the remaining cases
PRInt64 currentTime = PR_Now() / PR_USEC_PER_SEC;
PRInt64 delta = *aExpiry - currentTime;
// check whether the user wants to be prompted
if (mCookiesLifetimePolicy == ASK_BEFORE_ACCEPT) {
// if it's a session cookie and the user wants to accept these
// without asking, or if we are in private browsing mode, just
// accept the cookie and return
if ((*aIsSession && mCookiesAlwaysAcceptSession) ||
InPrivateBrowsing()) {
*aResult = PR_TRUE;
return NS_OK;
}
// default to rejecting, in case the prompting process fails
*aResult = PR_FALSE;
nsCAutoString hostPort;
aURI->GetHostPort(hostPort);
if (!aCookie) {
return NS_ERROR_UNEXPECTED;
}
// If there is no host, use the scheme, and append "://",
// to make sure it isn't a host or something.
// This is done to make the dialog appear for javascript cookies from
// file:// urls, and make the text on it not too weird. (bug 209689)
if (hostPort.IsEmpty()) {
aURI->GetScheme(hostPort);
if (hostPort.IsEmpty()) {
// still empty. Just return the default.
return NS_OK;
}
hostPort = hostPort + NS_LITERAL_CSTRING("://");
}
// we don't cache the cookiePromptService - it's not used often, so not
// worth the memory.
nsresult rv;
nsCOMPtr<nsICookiePromptService> cookiePromptService =
do_GetService(NS_COOKIEPROMPTSERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
// try to get a nsIDOMWindow from the channel...
nsCOMPtr<nsIDOMWindow> parent;
if (aChannel) {
nsCOMPtr<nsILoadContext> ctx;
NS_QueryNotificationCallbacks(aChannel, ctx);
if (ctx) {
ctx->GetAssociatedWindow(getter_AddRefs(parent));
}
}
// get some useful information to present to the user:
// whether a previous cookie already exists, and how many cookies this host
// has set
PRBool foundCookie = PR_FALSE;
PRUint32 countFromHost;
nsCOMPtr<nsICookieManager2> cookieManager = do_GetService(NS_COOKIEMANAGER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
nsCAutoString rawHost;
aCookie->GetRawHost(rawHost);
rv = cookieManager->CountCookiesFromHost(rawHost, &countFromHost);
if (NS_SUCCEEDED(rv) && countFromHost > 0)
rv = cookieManager->CookieExists(aCookie, &foundCookie);
}
if (NS_FAILED(rv)) return rv;
// check if the cookie we're trying to set is already expired, and return;
// but only if there's no previous cookie, because then we need to delete the previous
// cookie. we need this check to avoid prompting the user for already-expired cookies.
if (!foundCookie && !*aIsSession && delta <= 0) {
// the cookie has already expired. accept it, and let the backend figure
// out it's expired, so that we get correct logging & notifications.
*aResult = PR_TRUE;
return rv;
}
PRBool rememberDecision = PR_FALSE;
rv = cookiePromptService->CookieDialog(parent, aCookie, hostPort,
countFromHost, foundCookie,
&rememberDecision, aResult);
if (NS_FAILED(rv)) return rv;
if (*aResult == nsICookiePromptService::ACCEPT_SESSION_COOKIE)
*aIsSession = PR_TRUE;
if (rememberDecision) {
switch (*aResult) {
case nsICookiePromptService::DENY_COOKIE:
mPermMgr->Add(aURI, kPermissionType, (PRUint32) nsIPermissionManager::DENY_ACTION);
break;
case nsICookiePromptService::ACCEPT_COOKIE:
mPermMgr->Add(aURI, kPermissionType, (PRUint32) nsIPermissionManager::ALLOW_ACTION);
break;
case nsICookiePromptService::ACCEPT_SESSION_COOKIE:
mPermMgr->Add(aURI, kPermissionType, nsICookiePermission::ACCESS_SESSION);
break;
default:
break;
}
}
} else {
// we're not prompting, so we must be limiting the lifetime somehow
// if it's a session cookie, we do nothing
if (!*aIsSession && delta > 0) {
if (mCookiesLifetimePolicy == ACCEPT_SESSION) {
// limit lifetime to session
*aIsSession = PR_TRUE;
} else if (delta > mCookiesLifetimeSec) {
// limit lifetime to specified time
*aExpiry = currentTime + mCookiesLifetimeSec;
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCookiePermission::GetOriginatingURI(nsIChannel *aChannel,
nsIURI **aURI)
{
/* to find the originating URI, we use the loadgroup of the channel to obtain
* the window owning the load, and from there, we find the top same-type
* window and its URI. there are several possible cases:
*
* 1) no channel. this will occur for plugins using the nsICookieStorage
* interface, since they have none to provide. other consumers should
* have a channel.
*
* 2) a channel, but no window. this can occur when the consumer kicking
* off the load doesn't provide one to the channel, and should be limited
* to loads of certain types of resources.
*
* 3) a window equal to the top window of same type, with the channel its
* document channel. this covers the case of a freshly kicked-off load
* (e.g. the user typing something in the location bar, or clicking on a
* bookmark), where the window's URI hasn't yet been set, and will be
* bogus. we return the channel URI in this case.
*
* 4) Anything else. this covers most cases for an ordinary page load from
* the location bar, and will catch nested frames within a page, image
* loads, etc. we return the URI of the root window's document's principal
* in this case.
*/
*aURI = nsnull;
// case 1)
if (!aChannel)
return NS_ERROR_NULL_POINTER;
// find the associated window and its top window
nsCOMPtr<nsILoadContext> ctx;
NS_QueryNotificationCallbacks(aChannel, ctx);
nsCOMPtr<nsIDOMWindow> topWin, ourWin;
if (ctx) {
ctx->GetTopWindow(getter_AddRefs(topWin));
ctx->GetAssociatedWindow(getter_AddRefs(ourWin));
}
// case 2)
if (!topWin)
return NS_ERROR_INVALID_ARG;
// case 3)
if (ourWin == topWin) {
// Check whether this is the document channel for this window (representing
// a load of a new page). This is a bit of a nasty hack, but we will
// hopefully flag these channels better later.
nsLoadFlags flags;
aChannel->GetLoadFlags(&flags);
if (flags & nsIChannel::LOAD_DOCUMENT_URI) {
// get the channel URI - the window's will be bogus
aChannel->GetURI(aURI);
if (!*aURI)
return NS_ERROR_NULL_POINTER;
return NS_OK;
}
}
// case 4) - get the originating URI from the top window's principal
nsCOMPtr<nsIScriptObjectPrincipal> scriptObjPrin = do_QueryInterface(topWin);
NS_ENSURE_TRUE(scriptObjPrin, NS_ERROR_UNEXPECTED);
nsIPrincipal* prin = scriptObjPrin->GetPrincipal();
NS_ENSURE_TRUE(prin, NS_ERROR_UNEXPECTED);
prin->GetURI(aURI);
if (!*aURI)
return NS_ERROR_NULL_POINTER;
// all done!
return NS_OK;
}
NS_IMETHODIMP
nsCookiePermission::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *aData)
{
nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(aSubject);
NS_ASSERTION(!nsCRT::strcmp(NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, aTopic),
"unexpected topic - we only deal with pref changes!");
if (prefBranch)
PrefChanged(prefBranch, NS_LossyConvertUTF16toASCII(aData).get());
return NS_OK;
}
PRBool
nsCookiePermission::InPrivateBrowsing()
{
PRBool inPrivateBrowsingMode = PR_FALSE;
if (!mPBService)
mPBService = do_GetService(NS_PRIVATE_BROWSING_SERVICE_CONTRACTID);
if (mPBService)
mPBService->GetPrivateBrowsingEnabled(&inPrivateBrowsingMode);
return inPrivateBrowsingMode;
}
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