diff options
Diffstat (limited to '')
| -rw-r--r-- | netwerk/cookie/CookieService.cpp | 2588 |
1 files changed, 2588 insertions, 0 deletions
diff --git a/netwerk/cookie/CookieService.cpp b/netwerk/cookie/CookieService.cpp new file mode 100644 index 0000000000..c4716a159d --- /dev/null +++ b/netwerk/cookie/CookieService.cpp @@ -0,0 +1,2588 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set sw=2 ts=8 et tw=80 : */ +/* 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 "CookieCommons.h" +#include "CookieLogging.h" +#include "mozilla/AppShutdown.h" +#include "mozilla/ClearOnShutdown.h" +#include "mozilla/ContentBlockingNotifier.h" +#include "mozilla/RefPtr.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/nsMixedContentBlocker.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/net/CookieJarSettings.h" +#include "mozilla/net/CookiePersistentStorage.h" +#include "mozilla/net/CookiePrivateStorage.h" +#include "mozilla/net/CookieService.h" +#include "mozilla/net/CookieServiceChild.h" +#include "mozilla/net/HttpBaseChannel.h" +#include "mozilla/net/NeckoCommon.h" +#include "mozilla/StaticPrefs_network.h" +#include "mozilla/StoragePrincipalHelper.h" +#include "mozilla/Telemetry.h" +#include "mozIThirdPartyUtil.h" +#include "nsICookiePermission.h" +#include "nsIConsoleReportCollector.h" +#include "nsIEffectiveTLDService.h" +#include "nsIIDNService.h" +#include "nsIScriptError.h" +#include "nsIURL.h" +#include "nsIURI.h" +#include "nsIWebProgressListener.h" +#include "nsNetUtil.h" +#include "prprf.h" +#include "ThirdPartyUtil.h" + +using namespace mozilla::dom; + +namespace { + +uint32_t MakeCookieBehavior(uint32_t aCookieBehavior) { + bool isFirstPartyIsolated = OriginAttributes::IsFirstPartyEnabled(); + + if (isFirstPartyIsolated && + aCookieBehavior == + nsICookieService::BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN) { + return nsICookieService::BEHAVIOR_REJECT_TRACKER; + } + return aCookieBehavior; +} + +/* + Enables sanitizeOnShutdown cleaning prefs and disables the + network.cookie.lifetimePolicy +*/ +void MigrateCookieLifetimePrefs() { + // Former network.cookie.lifetimePolicy values ACCEPT_SESSION/ACCEPT_NORMALLY + // are not available anymore 2 = ACCEPT_SESSION + if (mozilla::Preferences::GetInt("network.cookie.lifetimePolicy") != 2) { + return; + } + if (!mozilla::Preferences::GetBool("privacy.sanitize.sanitizeOnShutdown")) { + mozilla::Preferences::SetBool("privacy.sanitize.sanitizeOnShutdown", true); + // To avoid clearing categories that the user did not intend to clear + mozilla::Preferences::SetBool("privacy.clearOnShutdown.history", false); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.formdata", false); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.downloads", false); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.sessions", false); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.siteSettings", + false); + } + mozilla::Preferences::SetBool("privacy.clearOnShutdown.cookies", true); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.cache", true); + mozilla::Preferences::SetBool("privacy.clearOnShutdown.offlineApps", true); + mozilla::Preferences::ClearUser("network.cookie.lifetimePolicy"); +} + +} // anonymous namespace + +// static +uint32_t nsICookieManager::GetCookieBehavior(bool aIsPrivate) { + if (aIsPrivate) { + // To sync the cookieBehavior pref between regular and private mode in ETP + // custom mode, we will return the regular cookieBehavior pref for private + // mode when + // 1. The regular cookieBehavior pref has a non-default value. + // 2. And the private cookieBehavior pref has a default value. + // Also, this can cover the migration case where the user has a non-default + // cookieBehavior before the private cookieBehavior was introduced. The + // getter here will directly return the regular cookieBehavior, so that the + // cookieBehavior for private mode is consistent. + if (mozilla::Preferences::HasUserValue( + "network.cookie.cookieBehavior.pbmode")) { + return MakeCookieBehavior( + mozilla::StaticPrefs::network_cookie_cookieBehavior_pbmode()); + } + + if (mozilla::Preferences::HasUserValue("network.cookie.cookieBehavior")) { + return MakeCookieBehavior( + mozilla::StaticPrefs::network_cookie_cookieBehavior()); + } + + return MakeCookieBehavior( + mozilla::StaticPrefs::network_cookie_cookieBehavior_pbmode()); + } + return MakeCookieBehavior( + mozilla::StaticPrefs::network_cookie_cookieBehavior()); +} + +namespace mozilla { +namespace net { + +/****************************************************************************** + * CookieService impl: + * useful types & constants + ******************************************************************************/ + +static StaticRefPtr<CookieService> gCookieService; + +constexpr auto CONSOLE_SAMESITE_CATEGORY = "cookieSameSite"_ns; +constexpr auto CONSOLE_OVERSIZE_CATEGORY = "cookiesOversize"_ns; +constexpr auto CONSOLE_REJECTION_CATEGORY = "cookiesRejection"_ns; +constexpr auto SAMESITE_MDN_URL = + "https://developer.mozilla.org/docs/Web/HTTP/Headers/Set-Cookie/" + u"SameSite"_ns; + +namespace { + +void ComposeCookieString(nsTArray<Cookie*>& aCookieList, + nsACString& aCookieString) { + for (Cookie* cookie : aCookieList) { + // check if we have anything to write + if (!cookie->Name().IsEmpty() || !cookie->Value().IsEmpty()) { + // if we've already added a cookie to the return list, append a "; " so + // that subsequent cookies are delimited in the final list. + if (!aCookieString.IsEmpty()) { + aCookieString.AppendLiteral("; "); + } + + if (!cookie->Name().IsEmpty()) { + // we have a name and value - write both + aCookieString += cookie->Name() + "="_ns + cookie->Value(); + } else { + // just write value + aCookieString += cookie->Value(); + } + } + } +} + +// Return false if the cookie should be ignored for the current channel. +bool ProcessSameSiteCookieForForeignRequest(nsIChannel* aChannel, + Cookie* aCookie, + bool aIsSafeTopLevelNav, + bool aLaxByDefault) { + // If it's a cross-site request and the cookie is same site only (strict) + // don't send it. + if (aCookie->SameSite() == nsICookie::SAMESITE_STRICT) { + return false; + } + + // Explicit SameSite=None cookies are always processed. When laxByDefault + // is OFF then so are default cookies. + if (aCookie->SameSite() == nsICookie::SAMESITE_NONE || + (!aLaxByDefault && aCookie->IsDefaultSameSite())) { + return true; + } + + int64_t currentTimeInUsec = PR_Now(); + + // 2 minutes of tolerance for 'SameSite=Lax by default' for cookies set + // without a SameSite value when used for unsafe http methods. + if (aLaxByDefault && aCookie->IsDefaultSameSite() && + StaticPrefs::network_cookie_sameSite_laxPlusPOST_timeout() > 0 && + currentTimeInUsec - aCookie->CreationTime() <= + (StaticPrefs::network_cookie_sameSite_laxPlusPOST_timeout() * + PR_USEC_PER_SEC) && + !NS_IsSafeMethodNav(aChannel)) { + return true; + } + + MOZ_ASSERT((aLaxByDefault && aCookie->IsDefaultSameSite()) || + aCookie->SameSite() == nsICookie::SAMESITE_LAX); + // We only have SameSite=Lax or lax-by-default cookies at this point. These + // are processed only if it's a top-level navigation + return aIsSafeTopLevelNav; +} + +} // namespace + +/****************************************************************************** + * CookieService impl: + * singleton instance ctor/dtor methods + ******************************************************************************/ + +already_AddRefed<nsICookieService> CookieService::GetXPCOMSingleton() { + if (IsNeckoChild()) { + return CookieServiceChild::GetSingleton(); + } + + return GetSingleton(); +} + +already_AddRefed<CookieService> CookieService::GetSingleton() { + NS_ASSERTION(!IsNeckoChild(), "not a parent process"); + + if (gCookieService) { + return do_AddRef(gCookieService); + } + + // Create a new singleton CookieService. + // We AddRef only once since XPCOM has rules about the ordering of module + // teardowns - by the time our module destructor is called, it's too late to + // Release our members (e.g. nsIObserverService and nsIPrefBranch), since GC + // cycles have already been completed and would result in serious leaks. + // See bug 209571. + // TODO: Verify what is the earliest point in time during shutdown where + // we can deny the creation of the CookieService as a whole. + gCookieService = new CookieService(); + if (gCookieService) { + if (NS_SUCCEEDED(gCookieService->Init())) { + ClearOnShutdown(&gCookieService); + } else { + gCookieService = nullptr; + } + } + + return do_AddRef(gCookieService); +} + +/****************************************************************************** + * CookieService impl: + * public methods + ******************************************************************************/ + +NS_IMPL_ISUPPORTS(CookieService, nsICookieService, nsICookieManager, + nsIObserver, nsISupportsWeakReference, nsIMemoryReporter) + +CookieService::CookieService() = default; + +nsresult CookieService::Init() { + nsresult rv; + mTLDService = do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + mIDNService = do_GetService(NS_IDNSERVICE_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + mThirdPartyUtil = do_GetService(THIRDPARTYUTIL_CONTRACTID); + NS_ENSURE_SUCCESS(rv, rv); + + // Init our default, and possibly private CookieStorages. + InitCookieStorages(); + + // Migrate network.cookie.lifetimePolicy pref to sanitizeOnShutdown prefs + MigrateCookieLifetimePrefs(); + + RegisterWeakMemoryReporter(this); + + nsCOMPtr<nsIObserverService> os = services::GetObserverService(); + NS_ENSURE_STATE(os); + os->AddObserver(this, "profile-before-change", true); + os->AddObserver(this, "profile-do-change", true); + os->AddObserver(this, "last-pb-context-exited", true); + + return NS_OK; +} + +void CookieService::InitCookieStorages() { + NS_ASSERTION(!mPersistentStorage, "already have a default CookieStorage"); + NS_ASSERTION(!mPrivateStorage, "already have a private CookieStorage"); + + // Create two new CookieStorages. If we are in or beyond our observed + // shutdown phase, just be non-persistent. + if (MOZ_UNLIKELY(StaticPrefs::network_cookie_noPersistentStorage() || + AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdown))) { + mPersistentStorage = CookiePrivateStorage::Create(); + } else { + mPersistentStorage = CookiePersistentStorage::Create(); + } + + mPrivateStorage = CookiePrivateStorage::Create(); +} + +void CookieService::CloseCookieStorages() { + // return if we already closed + if (!mPersistentStorage) { + return; + } + + // Let's nullify both storages before calling Close(). + RefPtr<CookieStorage> privateStorage; + privateStorage.swap(mPrivateStorage); + + RefPtr<CookieStorage> persistentStorage; + persistentStorage.swap(mPersistentStorage); + + privateStorage->Close(); + persistentStorage->Close(); +} + +CookieService::~CookieService() { + CloseCookieStorages(); + + UnregisterWeakMemoryReporter(this); + + gCookieService = nullptr; +} + +NS_IMETHODIMP +CookieService::Observe(nsISupports* /*aSubject*/, const char* aTopic, + const char16_t* /*aData*/) { + // check the topic + if (!strcmp(aTopic, "profile-before-change")) { + // The profile is about to change, + // or is going away because the application is shutting down. + + // Close the default DB connection and null out our CookieStorages before + // changing. + CloseCookieStorages(); + + } else if (!strcmp(aTopic, "profile-do-change")) { + NS_ASSERTION(!mPersistentStorage, "shouldn't have a default CookieStorage"); + NS_ASSERTION(!mPrivateStorage, "shouldn't have a private CookieStorage"); + + // the profile has already changed; init the db from the new location. + // if we are in the private browsing state, however, we do not want to read + // data into it - we should instead put it into the default state, so it's + // ready for us if and when we switch back to it. + InitCookieStorages(); + + } else if (!strcmp(aTopic, "last-pb-context-exited")) { + // Flush all the cookies stored by private browsing contexts + OriginAttributesPattern pattern; + pattern.mPrivateBrowsingId.Construct(1); + RemoveCookiesWithOriginAttributes(pattern, ""_ns); + mPrivateStorage = CookiePrivateStorage::Create(); + } + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetCookieBehavior(bool aIsPrivate, uint32_t* aCookieBehavior) { + NS_ENSURE_ARG_POINTER(aCookieBehavior); + *aCookieBehavior = nsICookieManager::GetCookieBehavior(aIsPrivate); + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetCookieStringFromDocument(Document* aDocument, + nsACString& aCookie) { + NS_ENSURE_ARG(aDocument); + + nsresult rv; + + aCookie.Truncate(); + + if (!IsInitialized()) { + return NS_OK; + } + + nsCOMPtr<nsIPrincipal> principal = aDocument->EffectiveCookiePrincipal(); + + if (!CookieCommons::IsSchemeSupported(principal)) { + return NS_OK; + } + + CookieStorage* storage = PickStorage(principal->OriginAttributesRef()); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomain(principal, baseDomain); + if (NS_WARN_IF(NS_FAILED(rv))) { + return NS_OK; + } + + nsAutoCString hostFromURI; + rv = nsContentUtils::GetHostOrIPv6WithBrackets(principal, hostFromURI); + if (NS_WARN_IF(NS_FAILED(rv))) { + return NS_OK; + } + + nsAutoCString pathFromURI; + rv = principal->GetFilePath(pathFromURI); + if (NS_WARN_IF(NS_FAILED(rv))) { + return NS_OK; + } + + int64_t currentTimeInUsec = PR_Now(); + int64_t currentTime = currentTimeInUsec / PR_USEC_PER_SEC; + + const nsTArray<RefPtr<Cookie>>* cookies = + storage->GetCookiesFromHost(baseDomain, principal->OriginAttributesRef()); + if (!cookies) { + return NS_OK; + } + + // check if the nsIPrincipal is using an https secure protocol. + // if it isn't, then we can't send a secure cookie over the connection. + bool potentiallyTurstworthy = principal->GetIsOriginPotentiallyTrustworthy(); + + bool thirdParty = true; + nsPIDOMWindowInner* innerWindow = aDocument->GetInnerWindow(); + // in gtests we don't have a window, let's consider those requests as 3rd + // party. + if (innerWindow) { + ThirdPartyUtil* thirdPartyUtil = ThirdPartyUtil::GetInstance(); + + if (thirdPartyUtil) { + Unused << thirdPartyUtil->IsThirdPartyWindow( + innerWindow->GetOuterWindow(), nullptr, &thirdParty); + } + } + + bool stale = false; + nsTArray<Cookie*> cookieList; + + // iterate the cookies! + for (Cookie* cookie : *cookies) { + // check the host, since the base domain lookup is conservative. + if (!CookieCommons::DomainMatches(cookie, hostFromURI)) { + continue; + } + + // if the cookie is httpOnly and it's not going directly to the HTTP + // connection, don't send it + if (cookie->IsHttpOnly()) { + continue; + } + + if (thirdParty && + !CookieCommons::ShouldIncludeCrossSiteCookieForDocument(cookie)) { + continue; + } + + // if the cookie is secure and the host scheme isn't, we can't send it + if (cookie->IsSecure() && !potentiallyTurstworthy) { + continue; + } + + // if the nsIURI path doesn't match the cookie path, don't send it back + if (!CookieCommons::PathMatches(cookie, pathFromURI)) { + continue; + } + + // check if the cookie has expired + if (cookie->Expiry() <= currentTime) { + continue; + } + + // all checks passed - add to list and check if lastAccessed stamp needs + // updating + cookieList.AppendElement(cookie); + if (cookie->IsStale()) { + stale = true; + } + } + + if (cookieList.IsEmpty()) { + return NS_OK; + } + + // update lastAccessed timestamps. we only do this if the timestamp is stale + // by a certain amount, to avoid thrashing the db during pageload. + if (stale) { + storage->StaleCookies(cookieList, currentTimeInUsec); + } + + // return cookies in order of path length; longest to shortest. + // this is required per RFC2109. if cookies match in length, + // then sort by creation time (see bug 236772). + cookieList.Sort(CompareCookiesForSending()); + ComposeCookieString(cookieList, aCookie); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetCookieStringFromHttp(nsIURI* aHostURI, nsIChannel* aChannel, + nsACString& aCookieString) { + NS_ENSURE_ARG(aHostURI); + NS_ENSURE_ARG(aChannel); + + aCookieString.Truncate(); + + if (!CookieCommons::IsSchemeSupported(aHostURI)) { + return NS_OK; + } + + uint32_t rejectedReason = 0; + ThirdPartyAnalysisResult result = mThirdPartyUtil->AnalyzeChannel( + aChannel, false, aHostURI, nullptr, &rejectedReason); + + OriginAttributes attrs; + StoragePrincipalHelper::GetOriginAttributes( + aChannel, attrs, StoragePrincipalHelper::eStorageAccessPrincipal); + + bool isSafeTopLevelNav = CookieCommons::IsSafeTopLevelNav(aChannel); + bool hadCrossSiteRedirects = false; + bool isSameSiteForeign = CookieCommons::IsSameSiteForeign( + aChannel, aHostURI, &hadCrossSiteRedirects); + + AutoTArray<Cookie*, 8> foundCookieList; + GetCookiesForURI( + aHostURI, aChannel, result.contains(ThirdPartyAnalysis::IsForeign), + result.contains(ThirdPartyAnalysis::IsThirdPartyTrackingResource), + result.contains(ThirdPartyAnalysis::IsThirdPartySocialTrackingResource), + result.contains(ThirdPartyAnalysis::IsStorageAccessPermissionGranted), + rejectedReason, isSafeTopLevelNav, isSameSiteForeign, + hadCrossSiteRedirects, true, false, attrs, foundCookieList); + + ComposeCookieString(foundCookieList, aCookieString); + + if (!aCookieString.IsEmpty()) { + COOKIE_LOGSUCCESS(GET_COOKIE, aHostURI, aCookieString, nullptr, false); + } + return NS_OK; +} + +NS_IMETHODIMP +CookieService::SetCookieStringFromDocument(Document* aDocument, + const nsACString& aCookieString) { + NS_ENSURE_ARG(aDocument); + + if (!IsInitialized()) { + return NS_OK; + } + + nsCOMPtr<nsIURI> documentURI; + nsAutoCString baseDomain; + OriginAttributes attrs; + + int64_t currentTimeInUsec = PR_Now(); + + // This function is executed in this context, I don't need to keep objects + // alive. + auto hasExistingCookiesLambda = [&](const nsACString& aBaseDomain, + const OriginAttributes& aAttrs) { + CookieStorage* storage = PickStorage(aAttrs); + return !!storage->CountCookiesFromHost(aBaseDomain, + aAttrs.mPrivateBrowsingId); + }; + + RefPtr<Cookie> cookie = CookieCommons::CreateCookieFromDocument( + aDocument, aCookieString, currentTimeInUsec, mTLDService, mThirdPartyUtil, + hasExistingCookiesLambda, getter_AddRefs(documentURI), baseDomain, attrs); + if (!cookie) { + return NS_OK; + } + + bool thirdParty = true; + nsPIDOMWindowInner* innerWindow = aDocument->GetInnerWindow(); + // in gtests we don't have a window, let's consider those requests as 3rd + // party. + if (innerWindow) { + ThirdPartyUtil* thirdPartyUtil = ThirdPartyUtil::GetInstance(); + + if (thirdPartyUtil) { + Unused << thirdPartyUtil->IsThirdPartyWindow( + innerWindow->GetOuterWindow(), nullptr, &thirdParty); + } + } + + if (thirdParty && + !CookieCommons::ShouldIncludeCrossSiteCookieForDocument(cookie)) { + return NS_OK; + } + + nsCOMPtr<nsIConsoleReportCollector> crc = + do_QueryInterface(aDocument->GetChannel()); + + // add the cookie to the list. AddCookie() takes care of logging. + PickStorage(attrs)->AddCookie(crc, baseDomain, attrs, cookie, + currentTimeInUsec, documentURI, aCookieString, + false); + return NS_OK; +} + +NS_IMETHODIMP +CookieService::SetCookieStringFromHttp(nsIURI* aHostURI, + const nsACString& aCookieHeader, + nsIChannel* aChannel) { + NS_ENSURE_ARG(aHostURI); + NS_ENSURE_ARG(aChannel); + + if (!IsInitialized()) { + return NS_OK; + } + + if (!CookieCommons::IsSchemeSupported(aHostURI)) { + return NS_OK; + } + + uint32_t rejectedReason = 0; + ThirdPartyAnalysisResult result = mThirdPartyUtil->AnalyzeChannel( + aChannel, false, aHostURI, nullptr, &rejectedReason); + + OriginAttributes attrs; + StoragePrincipalHelper::GetOriginAttributes( + aChannel, attrs, StoragePrincipalHelper::eStorageAccessPrincipal); + + // get the base domain for the host URI. + // e.g. for "www.bbc.co.uk", this would be "bbc.co.uk". + // file:// URI's (i.e. with an empty host) are allowed, but any other + // scheme must have a non-empty host. A trailing dot in the host + // is acceptable. + bool requireHostMatch; + nsAutoCString baseDomain; + nsresult rv = CookieCommons::GetBaseDomain(mTLDService, aHostURI, baseDomain, + requireHostMatch); + if (NS_FAILED(rv)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, aCookieHeader, + "couldn't get base domain from URI"); + return NS_OK; + } + + nsCOMPtr<nsICookieJarSettings> cookieJarSettings = + CookieCommons::GetCookieJarSettings(aChannel); + + nsAutoCString hostFromURI; + nsContentUtils::GetHostOrIPv6WithBrackets(aHostURI, hostFromURI); + + nsAutoCString baseDomainFromURI; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, hostFromURI, + baseDomainFromURI); + NS_ENSURE_SUCCESS(rv, NS_OK); + + CookieStorage* storage = PickStorage(attrs); + + // check default prefs + uint32_t priorCookieCount = storage->CountCookiesFromHost( + baseDomainFromURI, attrs.mPrivateBrowsingId); + + nsCOMPtr<nsIConsoleReportCollector> crc = do_QueryInterface(aChannel); + + CookieStatus cookieStatus = CheckPrefs( + crc, cookieJarSettings, aHostURI, + result.contains(ThirdPartyAnalysis::IsForeign), + result.contains(ThirdPartyAnalysis::IsThirdPartyTrackingResource), + result.contains(ThirdPartyAnalysis::IsThirdPartySocialTrackingResource), + result.contains(ThirdPartyAnalysis::IsStorageAccessPermissionGranted), + aCookieHeader, priorCookieCount, attrs, &rejectedReason); + + MOZ_ASSERT_IF(rejectedReason, cookieStatus == STATUS_REJECTED); + + // fire a notification if third party or if cookie was rejected + // (but not if there was an error) + switch (cookieStatus) { + case STATUS_REJECTED: + CookieCommons::NotifyRejected(aHostURI, aChannel, rejectedReason, + OPERATION_WRITE); + return NS_OK; // Stop here + case STATUS_REJECTED_WITH_ERROR: + CookieCommons::NotifyRejected(aHostURI, aChannel, rejectedReason, + OPERATION_WRITE); + return NS_OK; + case STATUS_ACCEPTED: // Fallthrough + case STATUS_ACCEPT_SESSION: + NotifyAccepted(aChannel); + break; + default: + break; + } + + bool addonAllowsLoad = false; + nsCOMPtr<nsIURI> channelURI; + NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI)); + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + addonAllowsLoad = BasePrincipal::Cast(loadInfo->TriggeringPrincipal()) + ->AddonAllowsLoad(channelURI); + + bool isForeignAndNotAddon = false; + if (!addonAllowsLoad) { + mThirdPartyUtil->IsThirdPartyChannel(aChannel, aHostURI, + &isForeignAndNotAddon); + } + + nsCString cookieHeader(aCookieHeader); + + bool moreCookieToRead = true; + + // process each cookie in the header + while (moreCookieToRead) { + CookieStruct cookieData; + bool canSetCookie = false; + + moreCookieToRead = CanSetCookie( + aHostURI, baseDomain, cookieData, requireHostMatch, cookieStatus, + cookieHeader, true, isForeignAndNotAddon, crc, canSetCookie); + + if (!canSetCookie) { + continue; + } + + // check permissions from site permission list. + if (!CookieCommons::CheckCookiePermission(aChannel, cookieData)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, aCookieHeader, + "cookie rejected by permission manager"); + CookieCommons::NotifyRejected( + aHostURI, aChannel, + nsIWebProgressListener::STATE_COOKIES_BLOCKED_BY_PERMISSION, + OPERATION_WRITE); + CookieLogging::LogMessageToConsole( + crc, aHostURI, nsIScriptError::warningFlag, + CONSOLE_REJECTION_CATEGORY, "CookieRejectedByPermissionManager"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(cookieData.name()), + }); + continue; + } + + // create a new Cookie + RefPtr<Cookie> cookie = Cookie::Create(cookieData, attrs); + MOZ_ASSERT(cookie); + + int64_t currentTimeInUsec = PR_Now(); + cookie->SetLastAccessed(currentTimeInUsec); + cookie->SetCreationTime( + Cookie::GenerateUniqueCreationTime(currentTimeInUsec)); + + // add the cookie to the list. AddCookie() takes care of logging. + storage->AddCookie(crc, baseDomain, attrs, cookie, currentTimeInUsec, + aHostURI, aCookieHeader, true); + } + + return NS_OK; +} + +void CookieService::NotifyAccepted(nsIChannel* aChannel) { + ContentBlockingNotifier::OnDecision( + aChannel, ContentBlockingNotifier::BlockingDecision::eAllow, 0); +} + +/****************************************************************************** + * CookieService: + * public transaction helper impl + ******************************************************************************/ + +NS_IMETHODIMP +CookieService::RunInTransaction(nsICookieTransactionCallback* aCallback) { + NS_ENSURE_ARG(aCallback); + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + mPersistentStorage->EnsureInitialized(); + return mPersistentStorage->RunInTransaction(aCallback); +} + +/****************************************************************************** + * nsICookieManager impl: + * nsICookieManager + ******************************************************************************/ + +NS_IMETHODIMP +CookieService::RemoveAll() { + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + mPersistentStorage->EnsureInitialized(); + mPersistentStorage->RemoveAll(); + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetCookies(nsTArray<RefPtr<nsICookie>>& aCookies) { + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + mPersistentStorage->EnsureInitialized(); + + // We expose only non-private cookies. + mPersistentStorage->GetCookies(aCookies); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetSessionCookies(nsTArray<RefPtr<nsICookie>>& aCookies) { + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + mPersistentStorage->EnsureInitialized(); + + // We expose only non-private cookies. + mPersistentStorage->GetSessionCookies(aCookies); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::Add(const nsACString& aHost, const nsACString& aPath, + const nsACString& aName, const nsACString& aValue, + bool aIsSecure, bool aIsHttpOnly, bool aIsSession, + int64_t aExpiry, JS::Handle<JS::Value> aOriginAttributes, + int32_t aSameSite, nsICookie::schemeType aSchemeMap, + JSContext* aCx) { + OriginAttributes attrs; + + if (!aOriginAttributes.isObject() || !attrs.Init(aCx, aOriginAttributes)) { + return NS_ERROR_INVALID_ARG; + } + + return AddNative(aHost, aPath, aName, aValue, aIsSecure, aIsHttpOnly, + aIsSession, aExpiry, &attrs, aSameSite, aSchemeMap); +} + +NS_IMETHODIMP_(nsresult) +CookieService::AddNative(const nsACString& aHost, const nsACString& aPath, + const nsACString& aName, const nsACString& aValue, + bool aIsSecure, bool aIsHttpOnly, bool aIsSession, + int64_t aExpiry, OriginAttributes* aOriginAttributes, + int32_t aSameSite, nsICookie::schemeType aSchemeMap) { + if (NS_WARN_IF(!aOriginAttributes)) { + return NS_ERROR_FAILURE; + } + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + // first, normalize the hostname, and fail if it contains illegal characters. + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + // get the base domain for the host URI. + // e.g. for "www.bbc.co.uk", this would be "bbc.co.uk". + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + int64_t currentTimeInUsec = PR_Now(); + CookieKey key = CookieKey(baseDomain, *aOriginAttributes); + + CookieStruct cookieData(nsCString(aName), nsCString(aValue), nsCString(aHost), + nsCString(aPath), aExpiry, currentTimeInUsec, + Cookie::GenerateUniqueCreationTime(currentTimeInUsec), + aIsHttpOnly, aIsSession, aIsSecure, aSameSite, + aSameSite, aSchemeMap); + + RefPtr<Cookie> cookie = Cookie::Create(cookieData, key.mOriginAttributes); + MOZ_ASSERT(cookie); + + CookieStorage* storage = PickStorage(*aOriginAttributes); + storage->AddCookie(nullptr, baseDomain, *aOriginAttributes, cookie, + currentTimeInUsec, nullptr, VoidCString(), true); + return NS_OK; +} + +nsresult CookieService::Remove(const nsACString& aHost, + const OriginAttributes& aAttrs, + const nsACString& aName, + const nsACString& aPath) { + // first, normalize the hostname, and fail if it contains illegal characters. + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + if (!host.IsEmpty()) { + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + } + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + CookieStorage* storage = PickStorage(aAttrs); + storage->RemoveCookie(baseDomain, aAttrs, host, PromiseFlatCString(aName), + PromiseFlatCString(aPath)); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::Remove(const nsACString& aHost, const nsACString& aName, + const nsACString& aPath, + JS::Handle<JS::Value> aOriginAttributes, JSContext* aCx) { + OriginAttributes attrs; + + if (!aOriginAttributes.isObject() || !attrs.Init(aCx, aOriginAttributes)) { + return NS_ERROR_INVALID_ARG; + } + + return RemoveNative(aHost, aName, aPath, &attrs); +} + +NS_IMETHODIMP_(nsresult) +CookieService::RemoveNative(const nsACString& aHost, const nsACString& aName, + const nsACString& aPath, + OriginAttributes* aOriginAttributes) { + if (NS_WARN_IF(!aOriginAttributes)) { + return NS_ERROR_FAILURE; + } + + nsresult rv = Remove(aHost, *aOriginAttributes, aName, aPath); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + return NS_OK; +} + +enum class CookieProblem : uint32_t { + None = 0, + // Same-Site cookies (default or explicit) blocked due to redirect + RedirectDefault = 1 << 0, + RedirectExplicit = 1 << 1, + // Special case for googleads Same-Site cookies + RedirectGoogleAds = 1 << 2, + // Blocked due to other reasons + OtherDefault = 1 << 3, + OtherExplicit = 1 << 4 +}; +MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(CookieProblem) + +void CookieService::GetCookiesForURI( + nsIURI* aHostURI, nsIChannel* aChannel, bool aIsForeign, + bool aIsThirdPartyTrackingResource, + bool aIsThirdPartySocialTrackingResource, + bool aStorageAccessPermissionGranted, uint32_t aRejectedReason, + bool aIsSafeTopLevelNav, bool aIsSameSiteForeign, + bool aHadCrossSiteRedirects, bool aHttpBound, + bool aAllowSecureCookiesToInsecureOrigin, + const OriginAttributes& aOriginAttrs, nsTArray<Cookie*>& aCookieList) { + NS_ASSERTION(aHostURI, "null host!"); + + if (!CookieCommons::IsSchemeSupported(aHostURI)) { + return; + } + + if (!IsInitialized()) { + return; + } + + CookieStorage* storage = PickStorage(aOriginAttrs); + + // get the base domain, host, and path from the URI. + // e.g. for "www.bbc.co.uk", the base domain would be "bbc.co.uk". + // file:// URI's (i.e. with an empty host) are allowed, but any other + // scheme must have a non-empty host. A trailing dot in the host + // is acceptable. + bool requireHostMatch; + nsAutoCString baseDomain; + nsAutoCString hostFromURI; + nsAutoCString pathFromURI; + nsresult rv = CookieCommons::GetBaseDomain(mTLDService, aHostURI, baseDomain, + requireHostMatch); + if (NS_SUCCEEDED(rv)) { + rv = nsContentUtils::GetHostOrIPv6WithBrackets(aHostURI, hostFromURI); + } + if (NS_SUCCEEDED(rv)) { + rv = aHostURI->GetFilePath(pathFromURI); + } + if (NS_FAILED(rv)) { + COOKIE_LOGFAILURE(GET_COOKIE, aHostURI, VoidCString(), + "invalid host/path from URI"); + return; + } + + nsCOMPtr<nsICookieJarSettings> cookieJarSettings = + CookieCommons::GetCookieJarSettings(aChannel); + + nsAutoCString normalizedHostFromURI(hostFromURI); + rv = NormalizeHost(normalizedHostFromURI); + NS_ENSURE_SUCCESS_VOID(rv); + + nsAutoCString baseDomainFromURI; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, normalizedHostFromURI, + baseDomainFromURI); + NS_ENSURE_SUCCESS_VOID(rv); + + // check default prefs + uint32_t rejectedReason = aRejectedReason; + uint32_t priorCookieCount = storage->CountCookiesFromHost( + baseDomainFromURI, aOriginAttrs.mPrivateBrowsingId); + + nsCOMPtr<nsIConsoleReportCollector> crc = do_QueryInterface(aChannel); + CookieStatus cookieStatus = CheckPrefs( + crc, cookieJarSettings, aHostURI, aIsForeign, + aIsThirdPartyTrackingResource, aIsThirdPartySocialTrackingResource, + aStorageAccessPermissionGranted, VoidCString(), priorCookieCount, + aOriginAttrs, &rejectedReason); + + MOZ_ASSERT_IF(rejectedReason, cookieStatus == STATUS_REJECTED); + + // for GetCookie(), we only fire acceptance/rejection notifications + // (but not if there was an error) + switch (cookieStatus) { + case STATUS_REJECTED: + // If we don't have any cookies from this host, fail silently. + if (priorCookieCount) { + CookieCommons::NotifyRejected(aHostURI, aChannel, rejectedReason, + OPERATION_READ); + } + return; + default: + break; + } + + // Note: The following permissions logic is mirrored in + // extensions::MatchPattern::MatchesCookie. + // If it changes, please update that function, or file a bug for someone + // else to do so. + + // check if aHostURI is using an https secure protocol. + // if it isn't, then we can't send a secure cookie over the connection. + // if SchemeIs fails, assume an insecure connection, to be on the safe side + bool potentiallyTurstworthy = + nsMixedContentBlocker::IsPotentiallyTrustworthyOrigin(aHostURI); + + int64_t currentTimeInUsec = PR_Now(); + int64_t currentTime = currentTimeInUsec / PR_USEC_PER_SEC; + bool stale = false; + + const nsTArray<RefPtr<Cookie>>* cookies = + storage->GetCookiesFromHost(baseDomain, aOriginAttrs); + if (!cookies) { + return; + } + + bool laxByDefault = + StaticPrefs::network_cookie_sameSite_laxByDefault() && + !nsContentUtils::IsURIInPrefList( + aHostURI, "network.cookie.sameSite.laxByDefault.disabledHosts"); + + // We are counting blocked SameSite cookies to get an idea of + // potential website breakage before we reintroduce "laxByDefault". + // Special attention is paid to redirects where our behavior + // differs from Chrome (bug 1763073, crbug/1221316). + // + CookieProblem sameSiteProblems = CookieProblem::None; + + // iterate the cookies! + for (Cookie* cookie : *cookies) { + // check the host, since the base domain lookup is conservative. + if (!CookieCommons::DomainMatches(cookie, hostFromURI)) { + continue; + } + + // if the cookie is secure and the host scheme isn't, we avoid sending + // cookie if possible. But for process synchronization purposes, we may want + // the content process to know about the cookie (without it's value). In + // which case we will wipe the value before sending + if (cookie->IsSecure() && !potentiallyTurstworthy && + !aAllowSecureCookiesToInsecureOrigin) { + continue; + } + + // if the cookie is httpOnly and it's not going directly to the HTTP + // connection, don't send it + if (cookie->IsHttpOnly() && !aHttpBound) { + continue; + } + + // if the nsIURI path doesn't match the cookie path, don't send it back + if (!CookieCommons::PathMatches(cookie, pathFromURI)) { + continue; + } + + // check if the cookie has expired + if (cookie->Expiry() <= currentTime) { + continue; + } + + if (aHttpBound && aIsSameSiteForeign) { + bool blockCookie = !ProcessSameSiteCookieForForeignRequest( + aChannel, cookie, aIsSafeTopLevelNav, laxByDefault); + + // Record telemetry for blocked sameSite cookies. If laxByDefault is off, + // re-run the check to see if we would get different results with it + // turned on. + if (blockCookie || (!laxByDefault && cookie->IsDefaultSameSite() && + !ProcessSameSiteCookieForForeignRequest( + aChannel, cookie, aIsSafeTopLevelNav, true))) { + if (aHadCrossSiteRedirects) { + // Count the known problematic Google cookies from + // adservice.google.{com, de} etc. separately. This is not an exact + // domain match, but good enough for telemetry. + if (StringBeginsWith(hostFromURI, "adservice.google."_ns)) { + sameSiteProblems |= CookieProblem::RedirectGoogleAds; + } else { + if (cookie->IsDefaultSameSite()) { + sameSiteProblems |= CookieProblem::RedirectDefault; + } else { + sameSiteProblems |= CookieProblem::RedirectExplicit; + } + } + } else { + if (cookie->IsDefaultSameSite()) { + sameSiteProblems |= CookieProblem::OtherDefault; + } else { + sameSiteProblems |= CookieProblem::OtherExplicit; + } + } + } + + // Lax-by-default cookies are processed even with an intermediate + // cross-site redirect (they are treated like aIsSameSiteForeign = false). + // + // This is outside of ProcessSameSiteCookieForForeignRequest to still + // collect the same telemetry. + if (blockCookie && aHadCrossSiteRedirects && + cookie->IsDefaultSameSite() && + StaticPrefs:: + network_cookie_sameSite_laxByDefault_allowBoomerangRedirect()) { + blockCookie = false; + } + + if (blockCookie) { + if (aHadCrossSiteRedirects) { + CookieLogging::LogMessageToConsole( + crc, aHostURI, nsIScriptError::warningFlag, + CONSOLE_REJECTION_CATEGORY, "CookieBlockedCrossSiteRedirect"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(cookie->Name()), + }); + } + continue; + } + } + + // all checks passed - add to list and check if lastAccessed stamp needs + // updating + aCookieList.AppendElement(cookie); + if (cookie->IsStale()) { + stale = true; + } + } + + Telemetry::Accumulate(Telemetry::COOKIE_RETRIEVAL_SAMESITE_PROBLEM, + static_cast<uint32_t>(sameSiteProblems)); + + if (aCookieList.IsEmpty()) { + return; + } + + // Send a notification about the acceptance of the cookies now that we found + // some. + NotifyAccepted(aChannel); + + // update lastAccessed timestamps. we only do this if the timestamp is stale + // by a certain amount, to avoid thrashing the db during pageload. + if (stale) { + storage->StaleCookies(aCookieList, currentTimeInUsec); + } + + // return cookies in order of path length; longest to shortest. + // this is required per RFC2109. if cookies match in length, + // then sort by creation time (see bug 236772). + aCookieList.Sort(CompareCookiesForSending()); +} + +static bool ContainsUnicodeChars(const nsCString& str) { + const auto* start = str.BeginReading(); + const auto* end = str.EndReading(); + + return std::find_if(start, end, [](unsigned char c) { return c >= 0x80; }) != + end; +} + +static void RecordUnicodeTelemetry(const CookieStruct& cookieData) { + auto label = Telemetry::LABELS_NETWORK_COOKIE_UNICODE_BYTE::none; + if (ContainsUnicodeChars(cookieData.name())) { + label = Telemetry::LABELS_NETWORK_COOKIE_UNICODE_BYTE::unicodeName; + } else if (ContainsUnicodeChars(cookieData.value())) { + label = Telemetry::LABELS_NETWORK_COOKIE_UNICODE_BYTE::unicodeValue; + } + Telemetry::AccumulateCategorical(label); +} + +// processes a single cookie, and returns true if there are more cookies +// to be processed +bool CookieService::CanSetCookie( + nsIURI* aHostURI, const nsACString& aBaseDomain, CookieStruct& aCookieData, + bool aRequireHostMatch, CookieStatus aStatus, nsCString& aCookieHeader, + bool aFromHttp, bool aIsForeignAndNotAddon, nsIConsoleReportCollector* aCRC, + bool& aSetCookie) { + MOZ_ASSERT(aHostURI); + + aSetCookie = false; + + // init expiryTime such that session cookies won't prematurely expire + aCookieData.expiry() = INT64_MAX; + + aCookieData.schemeMap() = CookieCommons::URIToSchemeType(aHostURI); + + // aCookieHeader is an in/out param to point to the next cookie, if + // there is one. Save the present value for logging purposes + nsCString savedCookieHeader(aCookieHeader); + + // newCookie says whether there are multiple cookies in the header; + // so we can handle them separately. + nsAutoCString expires; + nsAutoCString maxage; + bool acceptedByParser = false; + bool newCookie = ParseAttributes(aCRC, aHostURI, aCookieHeader, aCookieData, + expires, maxage, acceptedByParser); + if (!acceptedByParser) { + return newCookie; + } + + // Collect telemetry on how often secure cookies are set from non-secure + // origins, and vice-versa. + // + // 0 = nonsecure and "http:" + // 1 = nonsecure and "https:" + // 2 = secure and "http:" + // 3 = secure and "https:" + bool potentiallyTurstworthy = + nsMixedContentBlocker::IsPotentiallyTrustworthyOrigin(aHostURI); + + int64_t currentTimeInUsec = PR_Now(); + + // calculate expiry time of cookie. + aCookieData.isSession() = + GetExpiry(aCookieData, expires, maxage, + currentTimeInUsec / PR_USEC_PER_SEC, aFromHttp); + if (aStatus == STATUS_ACCEPT_SESSION) { + // force lifetime to session. note that the expiration time, if set above, + // will still apply. + aCookieData.isSession() = true; + } + + // reject cookie if it's over the size limit, per RFC2109 + if (!CookieCommons::CheckNameAndValueSize(aCookieData)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "cookie too big (> 4kb)"); + + AutoTArray<nsString, 2> params = { + NS_ConvertUTF8toUTF16(aCookieData.name())}; + + nsString size; + size.AppendInt(kMaxBytesPerCookie); + params.AppendElement(size); + + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_OVERSIZE_CATEGORY, + "CookieOversize"_ns, params); + return newCookie; + } + + RecordUnicodeTelemetry(aCookieData); + + if (!CookieCommons::CheckName(aCookieData)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "invalid name character"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedInvalidCharName"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + // domain & path checks + if (!CheckDomain(aCookieData, aHostURI, aBaseDomain, aRequireHostMatch)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "failed the domain tests"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedInvalidDomain"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + if (!CheckPath(aCookieData, aCRC, aHostURI)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "failed the path tests"); + return newCookie; + } + + if (!CheckHiddenPrefix(aCookieData)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "failed the CheckHiddenPrefix tests"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedInvalidPrefix"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + // magic prefix checks. MUST be run after CheckDomain() and CheckPath() + if (!CheckPrefixes(aCookieData, potentiallyTurstworthy)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "failed the prefix tests"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedInvalidPrefix"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + if (!CookieCommons::CheckValue(aCookieData)) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "invalid value character"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedInvalidCharValue"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + // if the new cookie is httponly, make sure we're not coming from script + if (!aFromHttp && aCookieData.isHttpOnly()) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "cookie is httponly; coming from script"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedHttpOnlyButFromScript"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + // If the new cookie is non-https and wants to set secure flag, + // browser have to ignore this new cookie. + // (draft-ietf-httpbis-cookie-alone section 3.1) + if (aCookieData.isSecure() && !potentiallyTurstworthy) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, aCookieHeader, + "non-https cookie can't set secure flag"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_REJECTION_CATEGORY, + "CookieRejectedSecureButNonHttps"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + // If the new cookie is same-site but in a cross site context, + // browser must ignore the cookie. + bool laxByDefault = + StaticPrefs::network_cookie_sameSite_laxByDefault() && + !nsContentUtils::IsURIInPrefList( + aHostURI, "network.cookie.sameSite.laxByDefault.disabledHosts"); + auto effectiveSameSite = + laxByDefault ? aCookieData.sameSite() : aCookieData.rawSameSite(); + if ((effectiveSameSite != nsICookie::SAMESITE_NONE) && + aIsForeignAndNotAddon) { + COOKIE_LOGFAILURE(SET_COOKIE, aHostURI, savedCookieHeader, + "failed the samesite tests"); + + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_SAMESITE_CATEGORY, + "CookieRejectedForNonSameSiteness"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieData.name()), + }); + return newCookie; + } + + aSetCookie = true; + return newCookie; +} + +/****************************************************************************** + * CookieService impl: + * private cookie header parsing functions + ******************************************************************************/ + +// clang-format off +// The following comment block elucidates the function of ParseAttributes. +/****************************************************************************** + ** Augmented BNF, modified from RFC2109 Section 4.2.2 and RFC2616 Section 2.1 + ** please note: this BNF deviates from both specifications, and reflects this + ** implementation. <bnf> indicates a reference to the defined grammar "bnf". + + ** Differences from RFC2109/2616 and explanations: + 1. implied *LWS + The grammar described by this specification is word-based. Except + where noted otherwise, linear white space (<LWS>) can be included + between any two adjacent words (token or quoted-string), and + between adjacent words and separators, without changing the + interpretation of a field. + <LWS> according to spec is SP|HT|CR|LF, but here, we allow only SP | HT. + + 2. We use CR | LF as cookie separators, not ',' per spec, since ',' is in + common use inside values. + + 3. tokens and values have looser restrictions on allowed characters than + spec. This is also due to certain characters being in common use inside + values. We allow only '=' to separate token/value pairs, and ';' to + terminate tokens or values. <LWS> is allowed within tokens and values + (see bug 206022). + + 4. where appropriate, full <OCTET>s are allowed, where the spec dictates to + reject control chars or non-ASCII chars. This is erring on the loose + side, since there's probably no good reason to enforce this strictness. + + 5. Attribute "HttpOnly", not covered in the RFCs, is supported + (see bug 178993). + + ** Begin BNF: + token = 1*<any allowed-chars except separators> + value = 1*<any allowed-chars except value-sep> + separators = ";" | "=" + value-sep = ";" + cookie-sep = CR | LF + allowed-chars = <any OCTET except NUL or cookie-sep> + OCTET = <any 8-bit sequence of data> + LWS = SP | HT + NUL = <US-ASCII NUL, null control character (0)> + CR = <US-ASCII CR, carriage return (13)> + LF = <US-ASCII LF, linefeed (10)> + SP = <US-ASCII SP, space (32)> + HT = <US-ASCII HT, horizontal-tab (9)> + + set-cookie = "Set-Cookie:" cookies + cookies = cookie *( cookie-sep cookie ) + cookie = [NAME "="] VALUE *(";" cookie-av) ; cookie NAME/VALUE must come first + NAME = token ; cookie name + VALUE = value ; cookie value + cookie-av = token ["=" value] + + valid values for cookie-av (checked post-parsing) are: + cookie-av = "Path" "=" value + | "Domain" "=" value + | "Expires" "=" value + | "Max-Age" "=" value + | "Comment" "=" value + | "Version" "=" value + | "Secure" + | "HttpOnly" + +******************************************************************************/ +// clang-format on + +// helper functions for GetTokenValue +static inline bool isnull(char c) { return c == 0; } +static inline bool iswhitespace(char c) { return c == ' ' || c == '\t'; } +static inline bool isterminator(char c) { return c == '\n' || c == '\r'; } +static inline bool isvalueseparator(char c) { + return isterminator(c) || c == ';'; +} +static inline bool istokenseparator(char c) { + return isvalueseparator(c) || c == '='; +} + +// Parse a single token/value pair. +// Returns true if a cookie terminator is found, so caller can parse new cookie. +bool CookieService::GetTokenValue(nsACString::const_char_iterator& aIter, + nsACString::const_char_iterator& aEndIter, + nsDependentCSubstring& aTokenString, + nsDependentCSubstring& aTokenValue, + bool& aEqualsFound) { + nsACString::const_char_iterator start; + nsACString::const_char_iterator lastSpace; + // initialize value string to clear garbage + aTokenValue.Rebind(aIter, aIter); + + // find <token>, including any <LWS> between the end-of-token and the + // token separator. we'll remove trailing <LWS> next + while (aIter != aEndIter && iswhitespace(*aIter)) { + ++aIter; + } + start = aIter; + while (aIter != aEndIter && !isnull(*aIter) && !istokenseparator(*aIter)) { + ++aIter; + } + + // remove trailing <LWS>; first check we're not at the beginning + lastSpace = aIter; + if (lastSpace != start) { + while (--lastSpace != start && iswhitespace(*lastSpace)) { + } + ++lastSpace; + } + aTokenString.Rebind(start, lastSpace); + + aEqualsFound = (*aIter == '='); + if (aEqualsFound) { + // find <value> + while (++aIter != aEndIter && iswhitespace(*aIter)) { + } + + start = aIter; + + // process <token> + // just look for ';' to terminate ('=' allowed) + while (aIter != aEndIter && !isnull(*aIter) && !isvalueseparator(*aIter)) { + ++aIter; + } + + // remove trailing <LWS>; first check we're not at the beginning + if (aIter != start) { + lastSpace = aIter; + while (--lastSpace != start && iswhitespace(*lastSpace)) { + } + + aTokenValue.Rebind(start, ++lastSpace); + } + } + + // aIter is on ';', or terminator, or EOS + if (aIter != aEndIter) { + // if on terminator, increment past & return true to process new cookie + if (isterminator(*aIter)) { + ++aIter; + return true; + } + // fall-through: aIter is on ';', increment and return false + ++aIter; + } + return false; +} + +static inline void SetSameSiteAttributeDefault(CookieStruct& aCookieData) { + // Set cookie with SameSite attribute that is treated as Default + // and doesn't requires changing the DB schema. + aCookieData.sameSite() = nsICookie::SAMESITE_LAX; + aCookieData.rawSameSite() = nsICookie::SAMESITE_NONE; +} + +static inline void SetSameSiteAttribute(CookieStruct& aCookieData, + int32_t aValue) { + aCookieData.sameSite() = aValue; + aCookieData.rawSameSite() = aValue; +} + +// Parses attributes from cookie header. expires/max-age attributes aren't +// folded into the cookie struct here, because we don't know which one to use +// until we've parsed the header. +bool CookieService::ParseAttributes(nsIConsoleReportCollector* aCRC, + nsIURI* aHostURI, nsCString& aCookieHeader, + CookieStruct& aCookieData, + nsACString& aExpires, nsACString& aMaxage, + bool& aAcceptedByParser) { + aAcceptedByParser = false; + + static const char kPath[] = "path"; + static const char kDomain[] = "domain"; + static const char kExpires[] = "expires"; + static const char kMaxage[] = "max-age"; + static const char kSecure[] = "secure"; + static const char kHttpOnly[] = "httponly"; + static const char kSameSite[] = "samesite"; + static const char kSameSiteLax[] = "lax"; + static const char kSameSiteNone[] = "none"; + static const char kSameSiteStrict[] = "strict"; + + nsACString::const_char_iterator cookieStart; + aCookieHeader.BeginReading(cookieStart); + + nsACString::const_char_iterator cookieEnd; + aCookieHeader.EndReading(cookieEnd); + + aCookieData.isSecure() = false; + aCookieData.isHttpOnly() = false; + + SetSameSiteAttributeDefault(aCookieData); + + nsDependentCSubstring tokenString(cookieStart, cookieStart); + nsDependentCSubstring tokenValue(cookieStart, cookieStart); + bool newCookie; + bool equalsFound; + + // extract cookie <NAME> & <VALUE> (first attribute), and copy the strings. + // if we find multiple cookies, return for processing + // note: if there's no '=', we assume token is <VALUE>. this is required by + // some sites (see bug 169091). + // XXX fix the parser to parse according to <VALUE> grammar for this case + newCookie = GetTokenValue(cookieStart, cookieEnd, tokenString, tokenValue, + equalsFound); + if (equalsFound) { + aCookieData.name() = tokenString; + aCookieData.value() = tokenValue; + } else { + aCookieData.value() = tokenString; + } + + // extract remaining attributes + while (cookieStart != cookieEnd && !newCookie) { + newCookie = GetTokenValue(cookieStart, cookieEnd, tokenString, tokenValue, + equalsFound); + + // decide which attribute we have, and copy the string + if (tokenString.LowerCaseEqualsLiteral(kPath)) { + aCookieData.path() = tokenValue; + + } else if (tokenString.LowerCaseEqualsLiteral(kDomain)) { + aCookieData.host() = tokenValue; + + } else if (tokenString.LowerCaseEqualsLiteral(kExpires)) { + aExpires = tokenValue; + + } else if (tokenString.LowerCaseEqualsLiteral(kMaxage)) { + aMaxage = tokenValue; + + // ignore any tokenValue for isSecure; just set the boolean + } else if (tokenString.LowerCaseEqualsLiteral(kSecure)) { + aCookieData.isSecure() = true; + + // ignore any tokenValue for isHttpOnly (see bug 178993); + // just set the boolean + } else if (tokenString.LowerCaseEqualsLiteral(kHttpOnly)) { + aCookieData.isHttpOnly() = true; + + } else if (tokenString.LowerCaseEqualsLiteral(kSameSite)) { + if (tokenValue.LowerCaseEqualsLiteral(kSameSiteLax)) { + SetSameSiteAttribute(aCookieData, nsICookie::SAMESITE_LAX); + } else if (tokenValue.LowerCaseEqualsLiteral(kSameSiteStrict)) { + SetSameSiteAttribute(aCookieData, nsICookie::SAMESITE_STRICT); + } else if (tokenValue.LowerCaseEqualsLiteral(kSameSiteNone)) { + SetSameSiteAttribute(aCookieData, nsICookie::SAMESITE_NONE); + } else { + // Reset to Default if unknown token value (see Bug 1682450) + SetSameSiteAttributeDefault(aCookieData); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::infoFlag, CONSOLE_SAMESITE_CATEGORY, + "CookieSameSiteValueInvalid2"_ns, + AutoTArray<nsString, 1>{NS_ConvertUTF8toUTF16(aCookieData.name())}); + } + } + } + + // re-assign aCookieHeader, in case we need to process another cookie + aCookieHeader.Assign(Substring(cookieStart, cookieEnd)); + + // If same-site is explicitly set to 'none' but this is not a secure context, + // let's abort the parsing. + if (!aCookieData.isSecure() && + aCookieData.sameSite() == nsICookie::SAMESITE_NONE) { + if (StaticPrefs::network_cookie_sameSite_noneRequiresSecure()) { + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::errorFlag, CONSOLE_SAMESITE_CATEGORY, + "CookieRejectedNonRequiresSecure2"_ns, + AutoTArray<nsString, 1>{NS_ConvertUTF8toUTF16(aCookieData.name())}); + return newCookie; + } + + // Still warn about the missing Secure attribute when not enforcing. + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_SAMESITE_CATEGORY, + "CookieRejectedNonRequiresSecureForBeta3"_ns, + AutoTArray<nsString, 2>{NS_ConvertUTF8toUTF16(aCookieData.name()), + SAMESITE_MDN_URL}); + } + + if (aCookieData.rawSameSite() == nsICookie::SAMESITE_NONE && + aCookieData.sameSite() == nsICookie::SAMESITE_LAX) { + bool laxByDefault = + StaticPrefs::network_cookie_sameSite_laxByDefault() && + !nsContentUtils::IsURIInPrefList( + aHostURI, "network.cookie.sameSite.laxByDefault.disabledHosts"); + if (laxByDefault) { + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::infoFlag, CONSOLE_SAMESITE_CATEGORY, + "CookieLaxForced2"_ns, + AutoTArray<nsString, 1>{NS_ConvertUTF8toUTF16(aCookieData.name())}); + } else { + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, + CONSOLE_SAMESITE_CATEGORY, "CookieLaxForcedForBeta2"_ns, + AutoTArray<nsString, 2>{NS_ConvertUTF8toUTF16(aCookieData.name()), + SAMESITE_MDN_URL}); + } + } + + // Cookie accepted. + aAcceptedByParser = true; + + MOZ_ASSERT(Cookie::ValidateSameSite(aCookieData)); + return newCookie; +} + +/****************************************************************************** + * CookieService impl: + * private domain & permission compliance enforcement functions + ******************************************************************************/ + +// Normalizes the given hostname, component by component. ASCII/ACE +// components are lower-cased, and UTF-8 components are normalized per +// RFC 3454 and converted to ACE. +nsresult CookieService::NormalizeHost(nsCString& aHost) { + if (!IsAscii(aHost)) { + nsAutoCString host; + nsresult rv = mIDNService->ConvertUTF8toACE(aHost, host); + if (NS_FAILED(rv)) { + return rv; + } + + aHost = host; + } + + ToLowerCase(aHost); + return NS_OK; +} + +// returns true if 'a' is equal to or a subdomain of 'b', +// assuming no leading dots are present. +static inline bool IsSubdomainOf(const nsACString& a, const nsACString& b) { + if (a == b) { + return true; + } + if (a.Length() > b.Length()) { + return a[a.Length() - b.Length() - 1] == '.' && StringEndsWith(a, b); + } + return false; +} + +CookieStatus CookieService::CheckPrefs( + nsIConsoleReportCollector* aCRC, nsICookieJarSettings* aCookieJarSettings, + nsIURI* aHostURI, bool aIsForeign, bool aIsThirdPartyTrackingResource, + bool aIsThirdPartySocialTrackingResource, + bool aStorageAccessPermissionGranted, const nsACString& aCookieHeader, + const int aNumOfCookies, const OriginAttributes& aOriginAttrs, + uint32_t* aRejectedReason) { + nsresult rv; + + MOZ_ASSERT(aRejectedReason); + + *aRejectedReason = 0; + + // don't let unsupported scheme sites get/set cookies (could be a security + // issue) + if (!CookieCommons::IsSchemeSupported(aHostURI)) { + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "non http/https sites cannot read cookies"); + return STATUS_REJECTED_WITH_ERROR; + } + + nsCOMPtr<nsIPrincipal> principal = + BasePrincipal::CreateContentPrincipal(aHostURI, aOriginAttrs); + + if (!principal) { + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "non-content principals cannot get/set cookies"); + return STATUS_REJECTED_WITH_ERROR; + } + + // check the permission list first; if we find an entry, it overrides + // default prefs. see bug 184059. + uint32_t cookiePermission = nsICookiePermission::ACCESS_DEFAULT; + rv = aCookieJarSettings->CookiePermission(principal, &cookiePermission); + if (NS_SUCCEEDED(rv)) { + switch (cookiePermission) { + case nsICookiePermission::ACCESS_DENY: + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "cookies are blocked for this site"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, + CONSOLE_REJECTION_CATEGORY, "CookieRejectedByPermissionManager"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieHeader), + }); + + *aRejectedReason = + nsIWebProgressListener::STATE_COOKIES_BLOCKED_BY_PERMISSION; + return STATUS_REJECTED; + + case nsICookiePermission::ACCESS_ALLOW: + return STATUS_ACCEPTED; + default: + break; + } + } + + // No cookies allowed if this request comes from a resource in a 3rd party + // context, when anti-tracking protection is enabled and when we don't have + // access to the first-party cookie jar. + if (aIsForeign && aIsThirdPartyTrackingResource && + !aStorageAccessPermissionGranted && + aCookieJarSettings->GetRejectThirdPartyContexts()) { + bool rejectThirdPartyWithExceptions = + CookieJarSettings::IsRejectThirdPartyWithExceptions( + aCookieJarSettings->GetCookieBehavior()); + + uint32_t rejectReason = + rejectThirdPartyWithExceptions + ? nsIWebProgressListener::STATE_COOKIES_BLOCKED_FOREIGN + : nsIWebProgressListener::STATE_COOKIES_BLOCKED_TRACKER; + if (StoragePartitioningEnabled(rejectReason, aCookieJarSettings)) { + MOZ_ASSERT(!aOriginAttrs.mPartitionKey.IsEmpty(), + "We must have a StoragePrincipal here!"); + return STATUS_ACCEPTED; + } + + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "cookies are disabled in trackers"); + if (aIsThirdPartySocialTrackingResource) { + *aRejectedReason = + nsIWebProgressListener::STATE_COOKIES_BLOCKED_SOCIALTRACKER; + } else if (rejectThirdPartyWithExceptions) { + *aRejectedReason = nsIWebProgressListener::STATE_COOKIES_BLOCKED_FOREIGN; + } else { + *aRejectedReason = nsIWebProgressListener::STATE_COOKIES_BLOCKED_TRACKER; + } + return STATUS_REJECTED; + } + + // check default prefs. + // Check aStorageAccessPermissionGranted when checking aCookieBehavior + // so that we take things such as the content blocking allow list into + // account. + if (aCookieJarSettings->GetCookieBehavior() == + nsICookieService::BEHAVIOR_REJECT && + !aStorageAccessPermissionGranted) { + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "cookies are disabled"); + *aRejectedReason = nsIWebProgressListener::STATE_COOKIES_BLOCKED_ALL; + return STATUS_REJECTED; + } + + // check if cookie is foreign + if (aIsForeign) { + if (aCookieJarSettings->GetCookieBehavior() == + nsICookieService::BEHAVIOR_REJECT_FOREIGN && + !aStorageAccessPermissionGranted) { + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "context is third party"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, + CONSOLE_REJECTION_CATEGORY, "CookieRejectedThirdParty"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieHeader), + }); + *aRejectedReason = nsIWebProgressListener::STATE_COOKIES_BLOCKED_FOREIGN; + return STATUS_REJECTED; + } + + if (aCookieJarSettings->GetLimitForeignContexts() && + !aStorageAccessPermissionGranted && aNumOfCookies == 0) { + COOKIE_LOGFAILURE(!aCookieHeader.IsVoid(), aHostURI, aCookieHeader, + "context is third party"); + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, + CONSOLE_REJECTION_CATEGORY, "CookieRejectedThirdParty"_ns, + AutoTArray<nsString, 1>{ + NS_ConvertUTF8toUTF16(aCookieHeader), + }); + *aRejectedReason = nsIWebProgressListener::STATE_COOKIES_BLOCKED_FOREIGN; + return STATUS_REJECTED; + } + + if (StaticPrefs::network_cookie_thirdparty_sessionOnly()) { + return STATUS_ACCEPT_SESSION; + } + + if (StaticPrefs::network_cookie_thirdparty_nonsecureSessionOnly()) { + if (!aHostURI->SchemeIs("https")) { + return STATUS_ACCEPT_SESSION; + } + } + } + + // if nothing has complained, accept cookie + return STATUS_ACCEPTED; +} + +// processes domain attribute, and returns true if host has permission to set +// for this domain. +bool CookieService::CheckDomain(CookieStruct& aCookieData, nsIURI* aHostURI, + const nsACString& aBaseDomain, + bool aRequireHostMatch) { + // Note: The logic in this function is mirrored in + // toolkit/components/extensions/ext-cookies.js:checkSetCookiePermissions(). + // If it changes, please update that function, or file a bug for someone + // else to do so. + + // get host from aHostURI + nsAutoCString hostFromURI; + nsContentUtils::GetHostOrIPv6WithBrackets(aHostURI, hostFromURI); + + // if a domain is given, check the host has permission + if (!aCookieData.host().IsEmpty()) { + // Tolerate leading '.' characters, but not if it's otherwise an empty host. + if (aCookieData.host().Length() > 1 && aCookieData.host().First() == '.') { + aCookieData.host().Cut(0, 1); + } + + // switch to lowercase now, to avoid case-insensitive compares everywhere + ToLowerCase(aCookieData.host()); + + // check whether the host is either an IP address, an alias such as + // 'localhost', an eTLD such as 'co.uk', or the empty string. in these + // cases, require an exact string match for the domain, and leave the cookie + // as a non-domain one. bug 105917 originally noted the requirement to deal + // with IP addresses. + if (aRequireHostMatch) { + return hostFromURI.Equals(aCookieData.host()); + } + + // ensure the proposed domain is derived from the base domain; and also + // that the host domain is derived from the proposed domain (per RFC2109). + if (IsSubdomainOf(aCookieData.host(), aBaseDomain) && + IsSubdomainOf(hostFromURI, aCookieData.host())) { + // prepend a dot to indicate a domain cookie + aCookieData.host().InsertLiteral(".", 0); + return true; + } + + /* + * note: RFC2109 section 4.3.2 requires that we check the following: + * that the portion of host not in domain does not contain a dot. + * this prevents hosts of the form x.y.co.nz from setting cookies in the + * entire .co.nz domain. however, it's only a only a partial solution and + * it breaks sites (IE doesn't enforce it), so we don't perform this check. + */ + return false; + } + + // no domain specified, use hostFromURI + aCookieData.host() = hostFromURI; + return true; +} + +// static +bool CookieService::CheckHiddenPrefix(CookieStruct& aCookieData) { + // If a cookie is nameless, then its value must not start with + // `__Host-` or `__Secure-` + if (!aCookieData.name().IsEmpty()) { + return true; + } + + if (StringBeginsWith(aCookieData.value(), "__Host-"_ns)) { + return false; + } + + if (StringBeginsWith(aCookieData.value(), "__Secure-"_ns)) { + return false; + } + + return true; +} + +namespace { +nsAutoCString GetPathFromURI(nsIURI* aHostURI) { + // strip down everything after the last slash to get the path, + // ignoring slashes in the query string part. + // if we can QI to nsIURL, that'll take care of the query string portion. + // otherwise, it's not an nsIURL and can't have a query string, so just find + // the last slash. + nsAutoCString path; + nsCOMPtr<nsIURL> hostURL = do_QueryInterface(aHostURI); + if (hostURL) { + hostURL->GetDirectory(path); + } else { + aHostURI->GetPathQueryRef(path); + int32_t slash = path.RFindChar('/'); + if (slash != kNotFound) { + path.Truncate(slash + 1); + } + } + + // strip the right-most %x2F ("/") if the path doesn't contain only 1 '/'. + int32_t lastSlash = path.RFindChar('/'); + int32_t firstSlash = path.FindChar('/'); + if (lastSlash != firstSlash && lastSlash != kNotFound && + lastSlash == static_cast<int32_t>(path.Length() - 1)) { + path.Truncate(lastSlash); + } + + return path; +} + +} // namespace + +bool CookieService::CheckPath(CookieStruct& aCookieData, + nsIConsoleReportCollector* aCRC, + nsIURI* aHostURI) { + // if a path is given, check the host has permission + if (aCookieData.path().IsEmpty() || aCookieData.path().First() != '/') { + aCookieData.path() = GetPathFromURI(aHostURI); + +#if 0 + } else { + /** + * The following test is part of the RFC2109 spec. Loosely speaking, it says that a site + * cannot set a cookie for a path that it is not on. See bug 155083. However this patch + * broke several sites -- nordea (bug 155768) and citibank (bug 156725). So this test has + * been disabled, unless we can evangelize these sites. + */ + // get path from aHostURI + nsAutoCString pathFromURI; + if (NS_FAILED(aHostURI->GetPathQueryRef(pathFromURI)) || + !StringBeginsWith(pathFromURI, aCookieData.path())) { + return false; + } +#endif + } + + if (!CookieCommons::CheckPathSize(aCookieData)) { + AutoTArray<nsString, 2> params = { + NS_ConvertUTF8toUTF16(aCookieData.name())}; + + nsString size; + size.AppendInt(kMaxBytesPerPath); + params.AppendElement(size); + + CookieLogging::LogMessageToConsole( + aCRC, aHostURI, nsIScriptError::warningFlag, CONSOLE_OVERSIZE_CATEGORY, + "CookiePathOversize"_ns, params); + return false; + } + + return !aCookieData.path().Contains('\t'); +} + +// CheckPrefixes +// +// Reject cookies whose name starts with the magic prefixes from +// https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis +// if they do not meet the criteria required by the prefix. +// +// Must not be called until after CheckDomain() and CheckPath() have +// regularized and validated the CookieStruct values! +bool CookieService::CheckPrefixes(CookieStruct& aCookieData, + bool aSecureRequest) { + static const char kSecure[] = "__Secure-"; + static const char kHost[] = "__Host-"; + static const int kSecureLen = sizeof(kSecure) - 1; + static const int kHostLen = sizeof(kHost) - 1; + + bool isSecure = strncmp(aCookieData.name().get(), kSecure, kSecureLen) == 0; + bool isHost = strncmp(aCookieData.name().get(), kHost, kHostLen) == 0; + + if (!isSecure && !isHost) { + // not one of the magic prefixes: carry on + return true; + } + + if (!aSecureRequest || !aCookieData.isSecure()) { + // the magic prefixes may only be used from a secure request and + // the secure attribute must be set on the cookie + return false; + } + + if (isHost) { + // The host prefix requires that the path is "/" and that the cookie + // had no domain attribute. CheckDomain() and CheckPath() MUST be run + // first to make sure invalid attributes are rejected and to regularlize + // them. In particular all explicit domain attributes result in a host + // that starts with a dot, and if the host doesn't start with a dot it + // correctly matches the true host. + if (aCookieData.host()[0] == '.' || + !aCookieData.path().EqualsLiteral("/")) { + return false; + } + } + + return true; +} + +bool CookieService::GetExpiry(CookieStruct& aCookieData, + const nsACString& aExpires, + const nsACString& aMaxage, int64_t aCurrentTime, + bool aFromHttp) { + // maxageCap is in seconds. + // Disabled for HTTP cookies. + int64_t maxageCap = + aFromHttp ? 0 : StaticPrefs::privacy_documentCookies_maxage(); + + /* Determine when the cookie should expire. This is done by taking the + * difference between the server time and the time the server wants the cookie + * to expire, and adding that difference to the client time. This localizes + * the client time regardless of whether or not the TZ environment variable + * was set on the client. + * + * Note: We need to consider accounting for network lag here, per RFC. + */ + // check for max-age attribute first; this overrides expires attribute + if (!aMaxage.IsEmpty()) { + // obtain numeric value of maxageAttribute + int64_t maxage; + int32_t numInts = PR_sscanf(aMaxage.BeginReading(), "%lld", &maxage); + + // default to session cookie if the conversion failed + if (numInts != 1) { + return true; + } + + // if this addition overflows, expiryTime will be less than currentTime + // and the cookie will be expired - that's okay. + if (maxageCap) { + aCookieData.expiry() = aCurrentTime + std::min(maxage, maxageCap); + } else { + aCookieData.expiry() = aCurrentTime + maxage; + } + + // check for expires attribute + } else if (!aExpires.IsEmpty()) { + PRTime expires; + + // parse expiry time + if (PR_ParseTimeString(aExpires.BeginReading(), true, &expires) != + PR_SUCCESS) { + return true; + } + + // If set-cookie used absolute time to set expiration, and it can't use + // client time to set expiration. + // Because if current time be set in the future, but the cookie expire + // time be set less than current time and more than server time. + // The cookie item have to be used to the expired cookie. + if (maxageCap) { + aCookieData.expiry() = std::min(expires / int64_t(PR_USEC_PER_SEC), + aCurrentTime + maxageCap); + } else { + aCookieData.expiry() = expires / int64_t(PR_USEC_PER_SEC); + } + + // default to session cookie if no attributes found. Here we don't need to + // enforce the maxage cap, because session cookies are short-lived by + // definition. + } else { + return true; + } + + return false; +} + +/****************************************************************************** + * CookieService impl: + * private cookielist management functions + ******************************************************************************/ + +// find whether a given cookie has been previously set. this is provided by the +// nsICookieManager interface. +NS_IMETHODIMP +CookieService::CookieExists(const nsACString& aHost, const nsACString& aPath, + const nsACString& aName, + JS::Handle<JS::Value> aOriginAttributes, + JSContext* aCx, bool* aFoundCookie) { + NS_ENSURE_ARG_POINTER(aCx); + NS_ENSURE_ARG_POINTER(aFoundCookie); + + OriginAttributes attrs; + if (!aOriginAttributes.isObject() || !attrs.Init(aCx, aOriginAttributes)) { + return NS_ERROR_INVALID_ARG; + } + return CookieExistsNative(aHost, aPath, aName, &attrs, aFoundCookie); +} + +NS_IMETHODIMP_(nsresult) +CookieService::CookieExistsNative(const nsACString& aHost, + const nsACString& aPath, + const nsACString& aName, + OriginAttributes* aOriginAttributes, + bool* aFoundCookie) { + nsCOMPtr<nsICookie> cookie; + nsresult rv = GetCookieNative(aHost, aPath, aName, aOriginAttributes, + getter_AddRefs(cookie)); + NS_ENSURE_SUCCESS(rv, rv); + + *aFoundCookie = cookie != nullptr; + + return NS_OK; +} + +NS_IMETHODIMP_(nsresult) +CookieService::GetCookieNative(const nsACString& aHost, const nsACString& aPath, + const nsACString& aName, + OriginAttributes* aOriginAttributes, + nsICookie** aCookie) { + NS_ENSURE_ARG_POINTER(aOriginAttributes); + NS_ENSURE_ARG_POINTER(aCookie); + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + nsAutoCString baseDomain; + nsresult rv = + CookieCommons::GetBaseDomainFromHost(mTLDService, aHost, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + CookieListIter iter{}; + CookieStorage* storage = PickStorage(*aOriginAttributes); + bool foundCookie = storage->FindCookie(baseDomain, *aOriginAttributes, aHost, + aName, aPath, iter); + + if (foundCookie) { + RefPtr<Cookie> cookie = iter.Cookie(); + NS_ENSURE_TRUE(cookie, NS_ERROR_NULL_POINTER); + + cookie.forget(aCookie); + } + + return NS_OK; +} + +// count the number of cookies stored by a particular host. this is provided by +// the nsICookieManager interface. +NS_IMETHODIMP +CookieService::CountCookiesFromHost(const nsACString& aHost, + uint32_t* aCountFromHost) { + // first, normalize the hostname, and fail if it contains illegal characters. + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + mPersistentStorage->EnsureInitialized(); + + *aCountFromHost = mPersistentStorage->CountCookiesFromHost(baseDomain, 0); + + return NS_OK; +} + +// get an enumerator of cookies stored by a particular host. this is provided by +// the nsICookieManager interface. +NS_IMETHODIMP +CookieService::GetCookiesFromHost(const nsACString& aHost, + JS::Handle<JS::Value> aOriginAttributes, + JSContext* aCx, + nsTArray<RefPtr<nsICookie>>& aResult) { + // first, normalize the hostname, and fail if it contains illegal characters. + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + OriginAttributes attrs; + if (!aOriginAttributes.isObject() || !attrs.Init(aCx, aOriginAttributes)) { + return NS_ERROR_INVALID_ARG; + } + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + CookieStorage* storage = PickStorage(attrs); + + const nsTArray<RefPtr<Cookie>>* cookies = + storage->GetCookiesFromHost(baseDomain, attrs); + + if (cookies) { + aResult.SetCapacity(cookies->Length()); + for (Cookie* cookie : *cookies) { + aResult.AppendElement(cookie); + } + } + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::GetCookiesWithOriginAttributes( + const nsAString& aPattern, const nsACString& aHost, + nsTArray<RefPtr<nsICookie>>& aResult) { + OriginAttributesPattern pattern; + if (!pattern.Init(aPattern)) { + return NS_ERROR_INVALID_ARG; + } + + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + return GetCookiesWithOriginAttributes(pattern, baseDomain, aResult); +} + +nsresult CookieService::GetCookiesWithOriginAttributes( + const OriginAttributesPattern& aPattern, const nsCString& aBaseDomain, + nsTArray<RefPtr<nsICookie>>& aResult) { + CookieStorage* storage = PickStorage(aPattern); + storage->GetCookiesWithOriginAttributes(aPattern, aBaseDomain, aResult); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::RemoveCookiesWithOriginAttributes(const nsAString& aPattern, + const nsACString& aHost) { + MOZ_ASSERT(XRE_IsParentProcess()); + + OriginAttributesPattern pattern; + if (!pattern.Init(aPattern)) { + return NS_ERROR_INVALID_ARG; + } + + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + return RemoveCookiesWithOriginAttributes(pattern, baseDomain); +} + +nsresult CookieService::RemoveCookiesWithOriginAttributes( + const OriginAttributesPattern& aPattern, const nsCString& aBaseDomain) { + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + CookieStorage* storage = PickStorage(aPattern); + storage->RemoveCookiesWithOriginAttributes(aPattern, aBaseDomain); + + return NS_OK; +} + +NS_IMETHODIMP +CookieService::RemoveCookiesFromExactHost(const nsACString& aHost, + const nsAString& aPattern) { + MOZ_ASSERT(XRE_IsParentProcess()); + + OriginAttributesPattern pattern; + if (!pattern.Init(aPattern)) { + return NS_ERROR_INVALID_ARG; + } + + return RemoveCookiesFromExactHost(aHost, pattern); +} + +nsresult CookieService::RemoveCookiesFromExactHost( + const nsACString& aHost, const OriginAttributesPattern& aPattern) { + nsAutoCString host(aHost); + nsresult rv = NormalizeHost(host); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString baseDomain; + rv = CookieCommons::GetBaseDomainFromHost(mTLDService, host, baseDomain); + NS_ENSURE_SUCCESS(rv, rv); + + if (!IsInitialized()) { + return NS_ERROR_NOT_AVAILABLE; + } + + CookieStorage* storage = PickStorage(aPattern); + storage->RemoveCookiesFromExactHost(aHost, baseDomain, aPattern); + + return NS_OK; +} + +namespace { + +class RemoveAllSinceRunnable : public Runnable { + public: + using CookieArray = nsTArray<RefPtr<nsICookie>>; + RemoveAllSinceRunnable(Promise* aPromise, CookieService* aSelf, + CookieArray&& aCookieArray, int64_t aSinceWhen) + : Runnable("RemoveAllSinceRunnable"), + mPromise(aPromise), + mSelf(aSelf), + mList(std::move(aCookieArray)), + mIndex(0), + mSinceWhen(aSinceWhen) {} + + NS_IMETHODIMP Run() override { + RemoveSome(); + + if (mIndex < mList.Length()) { + return NS_DispatchToCurrentThread(this); + } + mPromise->MaybeResolveWithUndefined(); + + return NS_OK; + } + + private: + void RemoveSome() { + for (CookieArray::size_type iter = 0; + iter < kYieldPeriod && mIndex < mList.Length(); ++mIndex, ++iter) { + auto* cookie = static_cast<Cookie*>(mList[mIndex].get()); + if (cookie->CreationTime() > mSinceWhen && + NS_FAILED(mSelf->Remove(cookie->Host(), cookie->OriginAttributesRef(), + cookie->Name(), cookie->Path()))) { + continue; + } + } + } + + private: + RefPtr<Promise> mPromise; + RefPtr<CookieService> mSelf; + CookieArray mList; + CookieArray::size_type mIndex; + int64_t mSinceWhen; + static const CookieArray::size_type kYieldPeriod = 10; +}; + +} // namespace + +NS_IMETHODIMP +CookieService::RemoveAllSince(int64_t aSinceWhen, JSContext* aCx, + Promise** aRetVal) { + nsIGlobalObject* globalObject = xpc::CurrentNativeGlobal(aCx); + if (NS_WARN_IF(!globalObject)) { + return NS_ERROR_UNEXPECTED; + } + + ErrorResult result; + RefPtr<Promise> promise = Promise::Create(globalObject, result); + if (NS_WARN_IF(result.Failed())) { + return result.StealNSResult(); + } + + mPersistentStorage->EnsureInitialized(); + + nsTArray<RefPtr<nsICookie>> cookieList; + + // We delete only non-private cookies. + mPersistentStorage->GetAll(cookieList); + + RefPtr<RemoveAllSinceRunnable> runMe = new RemoveAllSinceRunnable( + promise, this, std::move(cookieList), aSinceWhen); + + promise.forget(aRetVal); + + return runMe->Run(); +} + +namespace { + +class CompareCookiesCreationTime { + public: + static bool Equals(const nsICookie* aCookie1, const nsICookie* aCookie2) { + return static_cast<const Cookie*>(aCookie1)->CreationTime() == + static_cast<const Cookie*>(aCookie2)->CreationTime(); + } + + static bool LessThan(const nsICookie* aCookie1, const nsICookie* aCookie2) { + return static_cast<const Cookie*>(aCookie1)->CreationTime() < + static_cast<const Cookie*>(aCookie2)->CreationTime(); + } +}; + +} // namespace + +NS_IMETHODIMP +CookieService::GetCookiesSince(int64_t aSinceWhen, + nsTArray<RefPtr<nsICookie>>& aResult) { + if (!IsInitialized()) { + return NS_OK; + } + + mPersistentStorage->EnsureInitialized(); + + // We expose only non-private cookies. + nsTArray<RefPtr<nsICookie>> cookieList; + mPersistentStorage->GetAll(cookieList); + + for (RefPtr<nsICookie>& cookie : cookieList) { + if (static_cast<Cookie*>(cookie.get())->CreationTime() >= aSinceWhen) { + aResult.AppendElement(cookie); + } + } + + aResult.Sort(CompareCookiesCreationTime()); + return NS_OK; +} + +size_t CookieService::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const { + size_t n = aMallocSizeOf(this); + + if (mPersistentStorage) { + n += mPersistentStorage->SizeOfIncludingThis(aMallocSizeOf); + } + if (mPrivateStorage) { + n += mPrivateStorage->SizeOfIncludingThis(aMallocSizeOf); + } + + return n; +} + +MOZ_DEFINE_MALLOC_SIZE_OF(CookieServiceMallocSizeOf) + +NS_IMETHODIMP +CookieService::CollectReports(nsIHandleReportCallback* aHandleReport, + nsISupports* aData, bool /*aAnonymize*/) { + MOZ_COLLECT_REPORT("explicit/cookie-service", KIND_HEAP, UNITS_BYTES, + SizeOfIncludingThis(CookieServiceMallocSizeOf), + "Memory used by the cookie service."); + + return NS_OK; +} + +bool CookieService::IsInitialized() const { + if (!mPersistentStorage) { + NS_WARNING("No CookieStorage! Profile already close?"); + return false; + } + + MOZ_ASSERT(mPrivateStorage); + return true; +} + +CookieStorage* CookieService::PickStorage(const OriginAttributes& aAttrs) { + MOZ_ASSERT(IsInitialized()); + + if (aAttrs.mPrivateBrowsingId > 0) { + return mPrivateStorage; + } + + mPersistentStorage->EnsureInitialized(); + return mPersistentStorage; +} + +CookieStorage* CookieService::PickStorage( + const OriginAttributesPattern& aAttrs) { + MOZ_ASSERT(IsInitialized()); + + if (aAttrs.mPrivateBrowsingId.WasPassed() && + aAttrs.mPrivateBrowsingId.Value() > 0) { + return mPrivateStorage; + } + + mPersistentStorage->EnsureInitialized(); + return mPersistentStorage; +} + +bool CookieService::SetCookiesFromIPC(const nsACString& aBaseDomain, + const OriginAttributes& aAttrs, + nsIURI* aHostURI, bool aFromHttp, + const nsTArray<CookieStruct>& aCookies) { + if (!IsInitialized()) { + // If we are probably shutting down, we can ignore this cookie. + return true; + } + + CookieStorage* storage = PickStorage(aAttrs); + int64_t currentTimeInUsec = PR_Now(); + + for (const CookieStruct& cookieData : aCookies) { + if (!CookieCommons::CheckPathSize(cookieData)) { + return false; + } + + // reject cookie if it's over the size limit, per RFC2109 + if (!CookieCommons::CheckNameAndValueSize(cookieData)) { + return false; + } + + RecordUnicodeTelemetry(cookieData); + + if (!CookieCommons::CheckName(cookieData)) { + return false; + } + + if (!CookieCommons::CheckValue(cookieData)) { + return false; + } + + // create a new Cookie and copy attributes + RefPtr<Cookie> cookie = Cookie::Create(cookieData, aAttrs); + if (!cookie) { + continue; + } + + cookie->SetLastAccessed(currentTimeInUsec); + cookie->SetCreationTime( + Cookie::GenerateUniqueCreationTime(currentTimeInUsec)); + + storage->AddCookie(nullptr, aBaseDomain, aAttrs, cookie, currentTimeInUsec, + aHostURI, ""_ns, aFromHttp); + } + + return true; +} + +} // namespace net +} // namespace mozilla |