зеркало из https://github.com/mozilla/gecko-dev.git
483 строки
16 KiB
C++
483 строки
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCookiePermission.h"
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#include "nsICookie2.h"
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#include "nsIServiceManager.h"
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#include "nsICookiePromptService.h"
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#include "nsICookieManager2.h"
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#include "nsNetUtil.h"
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#include "nsIURI.h"
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#include "nsIPrefService.h"
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#include "nsIPrefBranch.h"
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#include "nsIChannel.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIDOMWindow.h"
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#include "nsIPrincipal.h"
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#include "nsString.h"
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#include "nsCRT.h"
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#include "nsILoadContext.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsNetCID.h"
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/****************************************************************
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************************ nsCookiePermission ********************
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****************************************************************/
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// values for mCookiesLifetimePolicy
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// 0 == accept normally
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// 1 == ask before accepting
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// 2 == downgrade to session
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// 3 == limit lifetime to N days
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static const PRUint32 ACCEPT_NORMALLY = 0;
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static const PRUint32 ASK_BEFORE_ACCEPT = 1;
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static const PRUint32 ACCEPT_SESSION = 2;
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static const PRUint32 ACCEPT_FOR_N_DAYS = 3;
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static const bool kDefaultPolicy = true;
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static const char kCookiesLifetimePolicy[] = "network.cookie.lifetimePolicy";
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static const char kCookiesLifetimeDays[] = "network.cookie.lifetime.days";
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static const char kCookiesAlwaysAcceptSession[] = "network.cookie.alwaysAcceptSessionCookies";
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static const char kCookiesPrefsMigrated[] = "network.cookie.prefsMigrated";
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// obsolete pref names for migration
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static const char kCookiesLifetimeEnabled[] = "network.cookie.lifetime.enabled";
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static const char kCookiesLifetimeBehavior[] = "network.cookie.lifetime.behavior";
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static const char kCookiesAskPermission[] = "network.cookie.warnAboutCookies";
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static const char kPermissionType[] = "cookie";
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NS_IMPL_ISUPPORTS2(nsCookiePermission,
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nsICookiePermission,
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nsIObserver)
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bool
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nsCookiePermission::Init()
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{
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// Initialize nsIPermissionManager and fetch relevant prefs. This is only
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// required for some methods on nsICookiePermission, so it should be done
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// lazily.
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nsresult rv;
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mPermMgr = do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
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if (NS_FAILED(rv)) return false;
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// failure to access the pref service is non-fatal...
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nsCOMPtr<nsIPrefBranch> prefBranch =
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do_GetService(NS_PREFSERVICE_CONTRACTID);
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if (prefBranch) {
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prefBranch->AddObserver(kCookiesLifetimePolicy, this, false);
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prefBranch->AddObserver(kCookiesLifetimeDays, this, false);
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prefBranch->AddObserver(kCookiesAlwaysAcceptSession, this, false);
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PrefChanged(prefBranch, nullptr);
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// migration code for original cookie prefs
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bool migrated;
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rv = prefBranch->GetBoolPref(kCookiesPrefsMigrated, &migrated);
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if (NS_FAILED(rv) || !migrated) {
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bool warnAboutCookies = false;
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prefBranch->GetBoolPref(kCookiesAskPermission, &warnAboutCookies);
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// if the user is using ask before accepting, we'll use that
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if (warnAboutCookies)
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prefBranch->SetIntPref(kCookiesLifetimePolicy, ASK_BEFORE_ACCEPT);
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bool lifetimeEnabled = false;
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prefBranch->GetBoolPref(kCookiesLifetimeEnabled, &lifetimeEnabled);
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// if they're limiting lifetime and not using the prompts, use the
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// appropriate limited lifetime pref
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if (lifetimeEnabled && !warnAboutCookies) {
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PRInt32 lifetimeBehavior;
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prefBranch->GetIntPref(kCookiesLifetimeBehavior, &lifetimeBehavior);
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if (lifetimeBehavior)
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prefBranch->SetIntPref(kCookiesLifetimePolicy, ACCEPT_FOR_N_DAYS);
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else
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prefBranch->SetIntPref(kCookiesLifetimePolicy, ACCEPT_SESSION);
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}
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prefBranch->SetBoolPref(kCookiesPrefsMigrated, true);
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}
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}
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return true;
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}
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void
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nsCookiePermission::PrefChanged(nsIPrefBranch *aPrefBranch,
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const char *aPref)
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{
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PRInt32 val;
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#define PREF_CHANGED(_P) (!aPref || !strcmp(aPref, _P))
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if (PREF_CHANGED(kCookiesLifetimePolicy) &&
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NS_SUCCEEDED(aPrefBranch->GetIntPref(kCookiesLifetimePolicy, &val)))
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mCookiesLifetimePolicy = val;
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if (PREF_CHANGED(kCookiesLifetimeDays) &&
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NS_SUCCEEDED(aPrefBranch->GetIntPref(kCookiesLifetimeDays, &val)))
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// save cookie lifetime in seconds instead of days
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mCookiesLifetimeSec = val * 24 * 60 * 60;
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bool bval;
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if (PREF_CHANGED(kCookiesAlwaysAcceptSession) &&
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NS_SUCCEEDED(aPrefBranch->GetBoolPref(kCookiesAlwaysAcceptSession, &bval)))
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mCookiesAlwaysAcceptSession = bval;
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}
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NS_IMETHODIMP
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nsCookiePermission::SetAccess(nsIURI *aURI,
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nsCookieAccess aAccess)
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{
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// Lazily initialize ourselves
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if (!EnsureInitialized())
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return NS_ERROR_UNEXPECTED;
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//
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// NOTE: nsCookieAccess values conveniently match up with
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// the permission codes used by nsIPermissionManager.
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// this is nice because it avoids conversion code.
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//
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return mPermMgr->Add(aURI, kPermissionType, aAccess,
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nsIPermissionManager::EXPIRE_NEVER, 0);
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}
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NS_IMETHODIMP
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nsCookiePermission::CanAccess(nsIURI *aURI,
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nsIChannel *aChannel,
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nsCookieAccess *aResult)
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{
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// Check this protocol doesn't allow cookies
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bool hasFlags;
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nsresult rv =
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NS_URIChainHasFlags(aURI, nsIProtocolHandler::URI_FORBIDS_COOKIE_ACCESS,
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&hasFlags);
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if (NS_FAILED(rv) || hasFlags) {
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*aResult = ACCESS_DENY;
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return NS_OK;
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}
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// Lazily initialize ourselves
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if (!EnsureInitialized())
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return NS_ERROR_UNEXPECTED;
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// finally, check with permission manager...
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rv = mPermMgr->TestPermission(aURI, kPermissionType, (PRUint32 *) aResult);
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if (NS_SUCCEEDED(rv)) {
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switch (*aResult) {
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// if we have one of the publicly-available values, just return it
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case nsIPermissionManager::UNKNOWN_ACTION: // ACCESS_DEFAULT
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case nsIPermissionManager::ALLOW_ACTION: // ACCESS_ALLOW
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case nsIPermissionManager::DENY_ACTION: // ACCESS_DENY
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break;
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// ACCESS_SESSION means the cookie can be accepted; the session
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// downgrade will occur in CanSetCookie().
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case nsICookiePermission::ACCESS_SESSION:
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*aResult = ACCESS_ALLOW;
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break;
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// ack, an unknown type! just use the defaults.
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default:
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*aResult = ACCESS_DEFAULT;
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}
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}
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return rv;
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}
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NS_IMETHODIMP
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nsCookiePermission::CanSetCookie(nsIURI *aURI,
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nsIChannel *aChannel,
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nsICookie2 *aCookie,
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bool *aIsSession,
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PRInt64 *aExpiry,
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bool *aResult)
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{
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NS_ASSERTION(aURI, "null uri");
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*aResult = kDefaultPolicy;
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// Lazily initialize ourselves
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if (!EnsureInitialized())
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return NS_ERROR_UNEXPECTED;
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PRUint32 perm;
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mPermMgr->TestPermission(aURI, kPermissionType, &perm);
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switch (perm) {
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case nsICookiePermission::ACCESS_SESSION:
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*aIsSession = true;
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case nsIPermissionManager::ALLOW_ACTION: // ACCESS_ALLOW
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*aResult = true;
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break;
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case nsIPermissionManager::DENY_ACTION: // ACCESS_DENY
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*aResult = false;
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break;
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default:
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// the permission manager has nothing to say about this cookie -
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// so, we apply the default prefs to it.
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NS_ASSERTION(perm == nsIPermissionManager::UNKNOWN_ACTION, "unknown permission");
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// now we need to figure out what type of accept policy we're dealing with
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// if we accept cookies normally, just bail and return
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if (mCookiesLifetimePolicy == ACCEPT_NORMALLY) {
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*aResult = true;
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return NS_OK;
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}
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// declare this here since it'll be used in all of the remaining cases
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PRInt64 currentTime = PR_Now() / PR_USEC_PER_SEC;
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PRInt64 delta = *aExpiry - currentTime;
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// check whether the user wants to be prompted
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if (mCookiesLifetimePolicy == ASK_BEFORE_ACCEPT) {
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// if it's a session cookie and the user wants to accept these
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// without asking, or if we are in private browsing mode, just
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// accept the cookie and return
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if ((*aIsSession && mCookiesAlwaysAcceptSession) ||
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InPrivateBrowsing()) {
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*aResult = true;
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return NS_OK;
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}
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// default to rejecting, in case the prompting process fails
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*aResult = false;
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nsCAutoString hostPort;
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aURI->GetHostPort(hostPort);
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if (!aCookie) {
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return NS_ERROR_UNEXPECTED;
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}
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// If there is no host, use the scheme, and append "://",
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// to make sure it isn't a host or something.
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// This is done to make the dialog appear for javascript cookies from
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// file:// urls, and make the text on it not too weird. (bug 209689)
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if (hostPort.IsEmpty()) {
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aURI->GetScheme(hostPort);
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if (hostPort.IsEmpty()) {
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// still empty. Just return the default.
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return NS_OK;
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}
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hostPort = hostPort + NS_LITERAL_CSTRING("://");
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}
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// we don't cache the cookiePromptService - it's not used often, so not
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// worth the memory.
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nsresult rv;
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nsCOMPtr<nsICookiePromptService> cookiePromptService =
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do_GetService(NS_COOKIEPROMPTSERVICE_CONTRACTID, &rv);
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if (NS_FAILED(rv)) return rv;
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// try to get a nsIDOMWindow from the channel...
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nsCOMPtr<nsIDOMWindow> parent;
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if (aChannel) {
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nsCOMPtr<nsILoadContext> ctx;
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NS_QueryNotificationCallbacks(aChannel, ctx);
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if (ctx) {
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ctx->GetAssociatedWindow(getter_AddRefs(parent));
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}
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}
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// get some useful information to present to the user:
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// whether a previous cookie already exists, and how many cookies this host
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// has set
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bool foundCookie = false;
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PRUint32 countFromHost;
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nsCOMPtr<nsICookieManager2> cookieManager = do_GetService(NS_COOKIEMANAGER_CONTRACTID, &rv);
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if (NS_SUCCEEDED(rv)) {
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nsCAutoString rawHost;
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aCookie->GetRawHost(rawHost);
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rv = cookieManager->CountCookiesFromHost(rawHost, &countFromHost);
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if (NS_SUCCEEDED(rv) && countFromHost > 0)
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rv = cookieManager->CookieExists(aCookie, &foundCookie);
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}
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if (NS_FAILED(rv)) return rv;
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// check if the cookie we're trying to set is already expired, and return;
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// but only if there's no previous cookie, because then we need to delete the previous
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// cookie. we need this check to avoid prompting the user for already-expired cookies.
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if (!foundCookie && !*aIsSession && delta <= 0) {
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// the cookie has already expired. accept it, and let the backend figure
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// out it's expired, so that we get correct logging & notifications.
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*aResult = true;
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return rv;
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}
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bool rememberDecision = false;
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PRInt32 dialogRes = nsICookiePromptService::DENY_COOKIE;
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rv = cookiePromptService->CookieDialog(parent, aCookie, hostPort,
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countFromHost, foundCookie,
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&rememberDecision, &dialogRes);
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if (NS_FAILED(rv)) return rv;
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*aResult = !!dialogRes;
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if (dialogRes == nsICookiePromptService::ACCEPT_SESSION_COOKIE)
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*aIsSession = true;
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if (rememberDecision) {
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switch (dialogRes) {
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case nsICookiePromptService::DENY_COOKIE:
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mPermMgr->Add(aURI, kPermissionType, (PRUint32) nsIPermissionManager::DENY_ACTION,
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nsIPermissionManager::EXPIRE_NEVER, 0);
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break;
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case nsICookiePromptService::ACCEPT_COOKIE:
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mPermMgr->Add(aURI, kPermissionType, (PRUint32) nsIPermissionManager::ALLOW_ACTION,
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nsIPermissionManager::EXPIRE_NEVER, 0);
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break;
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case nsICookiePromptService::ACCEPT_SESSION_COOKIE:
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mPermMgr->Add(aURI, kPermissionType, nsICookiePermission::ACCESS_SESSION,
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nsIPermissionManager::EXPIRE_NEVER, 0);
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break;
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default:
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break;
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}
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}
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} else {
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// we're not prompting, so we must be limiting the lifetime somehow
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// if it's a session cookie, we do nothing
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if (!*aIsSession && delta > 0) {
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if (mCookiesLifetimePolicy == ACCEPT_SESSION) {
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// limit lifetime to session
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*aIsSession = true;
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} else if (delta > mCookiesLifetimeSec) {
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// limit lifetime to specified time
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*aExpiry = currentTime + mCookiesLifetimeSec;
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}
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}
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsCookiePermission::GetOriginatingURI(nsIChannel *aChannel,
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nsIURI **aURI)
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{
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/* to find the originating URI, we use the loadgroup of the channel to obtain
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* the window owning the load, and from there, we find the top same-type
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* window and its URI. there are several possible cases:
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*
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* 1) no channel.
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*
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* 2) a channel with the "force allow third party cookies" option set.
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* since we may not have a window, we return the channel URI in this case.
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*
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* 3) a channel, but no window. this can occur when the consumer kicking
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* off the load doesn't provide one to the channel, and should be limited
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* to loads of certain types of resources.
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*
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* 4) a window equal to the top window of same type, with the channel its
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* document channel. this covers the case of a freshly kicked-off load
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* (e.g. the user typing something in the location bar, or clicking on a
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* bookmark), where the window's URI hasn't yet been set, and will be
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* bogus. we return the channel URI in this case.
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*
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* 5) Anything else. this covers most cases for an ordinary page load from
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* the location bar, and will catch nested frames within a page, image
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* loads, etc. we return the URI of the root window's document's principal
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* in this case.
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*/
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*aURI = nullptr;
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// case 1)
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if (!aChannel)
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return NS_ERROR_NULL_POINTER;
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// case 2)
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nsCOMPtr<nsIHttpChannelInternal> httpChannelInternal = do_QueryInterface(aChannel);
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if (httpChannelInternal)
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{
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bool doForce = false;
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if (NS_SUCCEEDED(httpChannelInternal->GetForceAllowThirdPartyCookie(&doForce)) && doForce)
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{
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// return the channel's URI (we may not have a window)
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aChannel->GetURI(aURI);
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if (!*aURI)
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return NS_ERROR_NULL_POINTER;
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return NS_OK;
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}
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}
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// find the associated window and its top window
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nsCOMPtr<nsILoadContext> ctx;
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NS_QueryNotificationCallbacks(aChannel, ctx);
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nsCOMPtr<nsIDOMWindow> topWin, ourWin;
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if (ctx) {
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ctx->GetTopWindow(getter_AddRefs(topWin));
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ctx->GetAssociatedWindow(getter_AddRefs(ourWin));
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}
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// case 3)
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if (!topWin)
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return NS_ERROR_INVALID_ARG;
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// case 4)
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if (ourWin == topWin) {
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// Check whether this is the document channel for this window (representing
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// a load of a new page). This is a bit of a nasty hack, but we will
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// hopefully flag these channels better later.
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nsLoadFlags flags;
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aChannel->GetLoadFlags(&flags);
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if (flags & nsIChannel::LOAD_DOCUMENT_URI) {
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// get the channel URI - the window's will be bogus
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aChannel->GetURI(aURI);
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if (!*aURI)
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return NS_ERROR_NULL_POINTER;
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return NS_OK;
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}
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}
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// case 5) - get the originating URI from the top window's principal
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nsCOMPtr<nsIScriptObjectPrincipal> scriptObjPrin = do_QueryInterface(topWin);
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NS_ENSURE_TRUE(scriptObjPrin, NS_ERROR_UNEXPECTED);
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nsIPrincipal* prin = scriptObjPrin->GetPrincipal();
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NS_ENSURE_TRUE(prin, NS_ERROR_UNEXPECTED);
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prin->GetURI(aURI);
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if (!*aURI)
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return NS_ERROR_NULL_POINTER;
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// all done!
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return NS_OK;
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}
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NS_IMETHODIMP
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nsCookiePermission::Observe(nsISupports *aSubject,
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const char *aTopic,
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const PRUnichar *aData)
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{
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nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(aSubject);
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NS_ASSERTION(!nsCRT::strcmp(NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, aTopic),
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"unexpected topic - we only deal with pref changes!");
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if (prefBranch)
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PrefChanged(prefBranch, NS_LossyConvertUTF16toASCII(aData).get());
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return NS_OK;
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}
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bool
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nsCookiePermission::InPrivateBrowsing()
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{
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bool inPrivateBrowsingMode = false;
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if (!mPBService)
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mPBService = do_GetService(NS_PRIVATE_BROWSING_SERVICE_CONTRACTID);
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if (mPBService)
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mPBService->GetPrivateBrowsingEnabled(&inPrivateBrowsingMode);
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return inPrivateBrowsingMode;
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}
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