diff options
Diffstat (limited to 'netwerk/url-classifier/UrlClassifierCommon.cpp')
| -rw-r--r-- | netwerk/url-classifier/UrlClassifierCommon.cpp | 671 |
1 files changed, 671 insertions, 0 deletions
diff --git a/netwerk/url-classifier/UrlClassifierCommon.cpp b/netwerk/url-classifier/UrlClassifierCommon.cpp new file mode 100644 index 0000000000..21589cef94 --- /dev/null +++ b/netwerk/url-classifier/UrlClassifierCommon.cpp @@ -0,0 +1,671 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 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 "mozilla/net/UrlClassifierCommon.h" + +#include "mozilla/AntiTrackingUtils.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/Components.h" +#include "mozilla/ContentBlockingAllowList.h" +#include "mozilla/ContentBlockingNotifier.h" +#include "mozilla/dom/WindowGlobalParent.h" +#include "mozilla/net/HttpBaseChannel.h" +#include "mozilla/net/UrlClassifierFeatureFactory.h" +#include "mozilla/StaticPrefs_network.h" +#include "mozilla/StaticPrefs_privacy.h" +#include "mozilla/StaticPrefs_channelclassifier.h" +#include "mozilla/StaticPrefs_security.h" +#include "mozIThirdPartyUtil.h" +#include "nsContentUtils.h" +#include "nsIChannel.h" +#include "nsIClassifiedChannel.h" +#include "mozilla/dom/Document.h" +#include "nsIDocShell.h" +#include "nsIHttpChannel.h" +#include "nsIHttpChannelInternal.h" +#include "nsIParentChannel.h" +#include "nsIScriptError.h" +#include "nsIWebProgressListener.h" +#include "nsNetUtil.h" +#include "nsQueryObject.h" +#include "nsReadableUtils.h" + +namespace mozilla { +namespace net { + +const nsCString::size_type UrlClassifierCommon::sMaxSpecLength = 128; + +// MOZ_LOG=nsChannelClassifier:5 +LazyLogModule UrlClassifierCommon::sLog("nsChannelClassifier"); +LazyLogModule UrlClassifierCommon::sLogLeak("nsChannelClassifierLeak"); + +/* static */ +bool UrlClassifierCommon::AddonMayLoad(nsIChannel* aChannel, nsIURI* aURI) { + nsCOMPtr<nsILoadInfo> channelLoadInfo = aChannel->LoadInfo(); + // loadingPrincipal is used here to ensure we are loading into an + // addon principal. This allows an addon, with explicit permission, to + // call out to API endpoints that may otherwise get blocked. + nsIPrincipal* loadingPrincipal = channelLoadInfo->GetLoadingPrincipal(); + if (!loadingPrincipal) { + return false; + } + + return BasePrincipal::Cast(loadingPrincipal)->AddonAllowsLoad(aURI, true); +} + +/* static */ +bool UrlClassifierCommon::ShouldEnableProtectionForChannel( + nsIChannel* aChannel) { + MOZ_ASSERT(aChannel); + + nsCOMPtr<nsIURI> chanURI; + nsresult rv = aChannel->GetURI(getter_AddRefs(chanURI)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return false; + } + + if (UrlClassifierCommon::AddonMayLoad(aChannel, chanURI)) { + return false; + } + + nsCOMPtr<nsIURI> topWinURI; + nsCOMPtr<nsIHttpChannelInternal> channel = do_QueryInterface(aChannel); + if (NS_WARN_IF(!channel)) { + return false; + } + + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + MOZ_ASSERT(loadInfo); + + auto policyType = loadInfo->GetExternalContentPolicyType(); + if (policyType == ExtContentPolicy::TYPE_DOCUMENT) { + UC_LOG( + ("UrlClassifierCommon::ShouldEnableProtectionForChannel - " + "skipping top-level load for channel %p", + aChannel)); + return false; + } + + // Tracking protection will be enabled so return without updating + // the security state. If any channels are subsequently cancelled + // (page elements blocked) the state will be then updated. + + return true; +} + +/* static */ +nsresult UrlClassifierCommon::SetTrackingInfo( + nsIChannel* aChannel, const nsTArray<nsCString>& aLists, + const nsTArray<nsCString>& aFullHashes) { + NS_ENSURE_ARG(!aLists.IsEmpty()); + + // Can be called in EITHER the parent or child process. + nsresult rv; + nsCOMPtr<nsIClassifiedChannel> classifiedChannel = + do_QueryInterface(aChannel, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + if (classifiedChannel) { + classifiedChannel->SetMatchedTrackingInfo(aLists, aFullHashes); + } + + nsCOMPtr<nsIParentChannel> parentChannel; + NS_QueryNotificationCallbacks(aChannel, parentChannel); + if (parentChannel) { + // This channel is a parent-process proxy for a child process request. + // Tell the child process channel to do this as well. + // TODO: We can remove the code sending the IPC to content to update + // tracking info once we move the ContentBlockingLog into the parent. + // This would be done in Bug 1599046. + nsAutoCString strLists, strHashes; + TablesToString(aLists, strLists); + TablesToString(aFullHashes, strHashes); + + parentChannel->SetClassifierMatchedTrackingInfo(strLists, strHashes); + } + + return NS_OK; +} + +/* static */ +nsresult UrlClassifierCommon::SetBlockedContent(nsIChannel* channel, + nsresult aErrorCode, + const nsACString& aList, + const nsACString& aProvider, + const nsACString& aFullHash) { + NS_ENSURE_ARG(!aList.IsEmpty()); + + switch (aErrorCode) { + case NS_ERROR_MALWARE_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_MALWARE_URI); + break; + case NS_ERROR_PHISHING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_PHISHING_URI); + break; + case NS_ERROR_UNWANTED_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_UNWANTED_URI); + break; + case NS_ERROR_TRACKING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_TRACKING_URI); + break; + case NS_ERROR_BLOCKED_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_BLOCKED_URI); + break; + case NS_ERROR_HARMFUL_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_HARMFUL_URI); + break; + case NS_ERROR_CRYPTOMINING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_CRYPTOMINING_URI); + break; + case NS_ERROR_FINGERPRINTING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_FINGERPRINTING_URI); + break; + case NS_ERROR_SOCIALTRACKING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_SOCIALTRACKING_URI); + break; + case NS_ERROR_EMAILTRACKING_URI: + NS_SetRequestBlockingReason( + channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_EMAILTRACKING_URI); + break; + default: + MOZ_CRASH( + "Missing nsILoadInfo::BLOCKING_REASON* for the classification error"); + break; + } + + // Can be called in EITHER the parent or child process. + nsresult rv; + nsCOMPtr<nsIClassifiedChannel> classifiedChannel = + do_QueryInterface(channel, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + if (classifiedChannel) { + classifiedChannel->SetMatchedInfo(aList, aProvider, aFullHash); + } + + if (XRE_IsParentProcess()) { + nsCOMPtr<nsIParentChannel> parentChannel; + NS_QueryNotificationCallbacks(channel, parentChannel); + if (parentChannel) { + // This channel is a parent-process proxy for a child process request. + // Tell the child process channel to do this as well. + // TODO: We can remove the code sending the IPC to content to update + // matched info once we move the ContentBlockingLog into the parent. + // This would be done in Bug 1601063. + parentChannel->SetClassifierMatchedInfo(aList, aProvider, aFullHash); + } + + unsigned state = + UrlClassifierFeatureFactory::GetClassifierBlockingEventCode(aErrorCode); + if (!state) { + state = nsIWebProgressListener::STATE_BLOCKED_UNSAFE_CONTENT; + } + ContentBlockingNotifier::OnEvent(channel, state); + + return NS_OK; + } + + // TODO: ReportToConsole is called in the child process, + // If nsContentUtils::ReportToConsole is not fission compatiable(cannot report + // to correct top-level window), we need to do this in the parent process + // instead (find the top-level window in the parent and send an IPC to child + // processes to report console). + nsCOMPtr<mozIThirdPartyUtil> thirdPartyUtil = + components::ThirdPartyUtil::Service(); + if (NS_WARN_IF(!thirdPartyUtil)) { + return NS_OK; + } + + nsCOMPtr<nsIURI> uriBeingLoaded = + AntiTrackingUtils::MaybeGetDocumentURIBeingLoaded(channel); + nsCOMPtr<mozIDOMWindowProxy> win; + rv = thirdPartyUtil->GetTopWindowForChannel(channel, uriBeingLoaded, + getter_AddRefs(win)); + NS_ENSURE_SUCCESS(rv, NS_OK); + auto* pwin = nsPIDOMWindowOuter::From(win); + nsCOMPtr<nsIDocShell> docShell = pwin->GetDocShell(); + if (!docShell) { + return NS_OK; + } + RefPtr<dom::Document> doc = docShell->GetDocument(); + NS_ENSURE_TRUE(doc, NS_OK); + + // Log a warning to the web console. + nsCOMPtr<nsIURI> uri; + channel->GetURI(getter_AddRefs(uri)); + AutoTArray<nsString, 1> params; + CopyUTF8toUTF16(uri->GetSpecOrDefault(), *params.AppendElement()); + const char* message; + nsCString category; + + if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode)) { + message = UrlClassifierFeatureFactory:: + ClassifierBlockingErrorCodeToConsoleMessage(aErrorCode, category); + } else { + message = "UnsafeUriBlocked"; + category = "Safe Browsing"_ns; + } + + nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, category, doc, + nsContentUtils::eNECKO_PROPERTIES, message, + params); + + return NS_OK; +} + +/* static */ +nsresult UrlClassifierCommon::GetTopWindowURI(nsIChannel* aChannel, + nsIURI** aURI) { + MOZ_ASSERT(XRE_IsParentProcess()); + MOZ_ASSERT(aChannel); + + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + MOZ_ASSERT(loadInfo); + + RefPtr<dom::BrowsingContext> browsingContext; + nsresult rv = + loadInfo->GetTargetBrowsingContext(getter_AddRefs(browsingContext)); + if (NS_WARN_IF(NS_FAILED(rv)) || !browsingContext) { + return NS_ERROR_FAILURE; + } + + dom::CanonicalBrowsingContext* top = browsingContext->Canonical()->Top(); + dom::WindowGlobalParent* wgp = top->GetCurrentWindowGlobal(); + if (!wgp) { + return NS_ERROR_FAILURE; + } + + RefPtr<nsIURI> uri = wgp->GetDocumentURI(); + if (!uri) { + return NS_ERROR_FAILURE; + } + + uri.forget(aURI); + return NS_OK; +} + +/* static */ +nsresult UrlClassifierCommon::CreatePairwiseEntityListURI(nsIChannel* aChannel, + nsIURI** aURI) { + MOZ_ASSERT(aChannel); + MOZ_ASSERT(aURI); + + nsresult rv; + nsCOMPtr<nsIHttpChannelInternal> chan = do_QueryInterface(aChannel, &rv); + NS_ENSURE_SUCCESS(rv, rv); + if (!chan) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIURI> topWinURI; + rv = + UrlClassifierCommon::GetTopWindowURI(aChannel, getter_AddRefs(topWinURI)); + if (NS_FAILED(rv) || !topWinURI) { + // SharedWorker and ServiceWorker don't have an associated window, use + // client's URI instead. + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + MOZ_ASSERT(loadInfo); + + Maybe<dom::ClientInfo> clientInfo = loadInfo->GetClientInfo(); + if (clientInfo.isSome()) { + if ((clientInfo->Type() == dom::ClientType::Sharedworker) || + (clientInfo->Type() == dom::ClientType::Serviceworker)) { + UC_LOG( + ("UrlClassifierCommon::CreatePairwiseEntityListURI - " + "channel %p initiated by worker, get uri from client", + aChannel)); + + auto clientPrincipalOrErr = clientInfo->GetPrincipal(); + if (clientPrincipalOrErr.isOk()) { + nsCOMPtr<nsIPrincipal> principal = clientPrincipalOrErr.unwrap(); + if (principal) { + auto* basePrin = BasePrincipal::Cast(principal); + rv = basePrin->GetURI(getter_AddRefs(topWinURI)); + Unused << NS_WARN_IF(NS_FAILED(rv)); + } + } + } + } + + if (!topWinURI) { + UC_LOG( + ("UrlClassifierCommon::CreatePairwiseEntityListURI - " + "no top-level window associated with channel %p, " + "get uri from loading principal", + aChannel)); + + nsCOMPtr<nsIPrincipal> principal = loadInfo->GetLoadingPrincipal(); + if (principal) { + auto* basePrin = BasePrincipal::Cast(principal); + rv = basePrin->GetURI(getter_AddRefs(topWinURI)); + Unused << NS_WARN_IF(NS_FAILED(rv)); + } + } + } + + if (!topWinURI) { + UC_LOG( + ("UrlClassifierCommon::CreatePairwiseEntityListURI - " + "fail to get top-level window uri for channel %p", + aChannel)); + + // Return success because we want to continue to look up even without + // whitelist. + return NS_OK; + } + + nsCOMPtr<nsIScriptSecurityManager> securityManager = + do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + nsCOMPtr<nsIPrincipal> chanPrincipal; + rv = securityManager->GetChannelURIPrincipal(aChannel, + getter_AddRefs(chanPrincipal)); + NS_ENSURE_SUCCESS(rv, rv); + + // Craft a entitylist URL like "toplevel.page/?resource=third.party.domain" + nsAutoCString pageHostname, resourceDomain; + rv = topWinURI->GetHost(pageHostname); + if (NS_FAILED(rv)) { + // When the top-level page doesn't support GetHost, for example, about:home, + // we don't return an error here; instead, we return success to make sure + // that the lookup process calling this API continues to run. + if (UC_LOG_ENABLED()) { + nsCString topWinSpec = + topWinURI ? topWinURI->GetSpecOrDefault() : "(null)"_ns; + topWinSpec.Truncate( + std::min(topWinSpec.Length(), UrlClassifierCommon::sMaxSpecLength)); + UC_LOG( + ("UrlClassifierCommon::CreatePairwiseEntityListURI - " + "cannot get host from the top-level uri %s of channel %p", + topWinSpec.get(), aChannel)); + } + return NS_OK; + } + + rv = chanPrincipal->GetBaseDomain(resourceDomain); + NS_ENSURE_SUCCESS(rv, rv); + nsAutoCString entitylistEntry = + "http://"_ns + pageHostname + "/?resource="_ns + resourceDomain; + UC_LOG( + ("UrlClassifierCommon::CreatePairwiseEntityListURI - looking for %s in " + "the entitylist on channel %p", + entitylistEntry.get(), aChannel)); + + nsCOMPtr<nsIURI> entitylistURI; + rv = NS_NewURI(getter_AddRefs(entitylistURI), entitylistEntry); + if (NS_FAILED(rv)) { + return rv; + } + + entitylistURI.forget(aURI); + return NS_OK; +} + +namespace { + +void LowerPriorityHelper(nsIChannel* aChannel) { + MOZ_ASSERT(aChannel); + + bool isBlockingResource = false; + + nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel)); + if (cos) { + if (StaticPrefs::network_http_tailing_enabled()) { + uint32_t cosFlags = 0; + cos->GetClassFlags(&cosFlags); + isBlockingResource = + cosFlags & (nsIClassOfService::UrgentStart | + nsIClassOfService::Leader | nsIClassOfService::Unblocked); + + // Requests not allowed to be tailed are usually those with higher + // prioritization. That overweights being a tracker: don't throttle + // them when not in background. + if (!(cosFlags & nsIClassOfService::TailForbidden)) { + cos->AddClassFlags(nsIClassOfService::Throttleable); + } + } else { + // Yes, we even don't want to evaluate the isBlockingResource when tailing + // is off see bug 1395525. + + cos->AddClassFlags(nsIClassOfService::Throttleable); + } + } + + if (!isBlockingResource) { + nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(aChannel); + if (p) { + UC_LOG( + ("UrlClassifierCommon::LowerPriorityHelper - " + "setting PRIORITY_LOWEST for channel %p", + aChannel)); + p->SetPriority(nsISupportsPriority::PRIORITY_LOWEST); + } + } +} + +} // namespace + +// static +void UrlClassifierCommon::SetClassificationFlagsHelper( + nsIChannel* aChannel, uint32_t aClassificationFlags, bool aIsThirdParty) { + MOZ_ASSERT(aChannel); + + nsCOMPtr<nsIParentChannel> parentChannel; + NS_QueryNotificationCallbacks(aChannel, parentChannel); + if (parentChannel) { + // This channel is a parent-process proxy for a child process + // request. We should notify the child process as well. + parentChannel->NotifyClassificationFlags(aClassificationFlags, + aIsThirdParty); + } + + RefPtr<HttpBaseChannel> httpChannel = do_QueryObject(aChannel); + if (httpChannel) { + httpChannel->AddClassificationFlags(aClassificationFlags, aIsThirdParty); + } +} + +// static +void UrlClassifierCommon::AnnotateChannel(nsIChannel* aChannel, + uint32_t aClassificationFlags, + uint32_t aLoadingState) { + MOZ_ASSERT(XRE_IsParentProcess()); + MOZ_ASSERT(aChannel); + + nsCOMPtr<nsIURI> chanURI; + nsresult rv = aChannel->GetURI(getter_AddRefs(chanURI)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return; + } + + bool isThirdPartyWithTopLevelWinURI = + AntiTrackingUtils::IsThirdPartyChannel(aChannel); + + SetClassificationFlagsHelper(aChannel, aClassificationFlags, + isThirdPartyWithTopLevelWinURI); + + // We consider valid tracking flags (based on the current strict vs basic list + // prefs) and cryptomining (which is not considered as tracking). + bool validClassificationFlags = + IsTrackingClassificationFlag(aClassificationFlags, + NS_UsePrivateBrowsing(aChannel)) || + IsCryptominingClassificationFlag(aClassificationFlags, + NS_UsePrivateBrowsing(aChannel)); + + if (validClassificationFlags && isThirdPartyWithTopLevelWinURI) { + ContentBlockingNotifier::OnEvent(aChannel, aLoadingState); + } + + if (isThirdPartyWithTopLevelWinURI && + StaticPrefs::privacy_trackingprotection_lower_network_priority()) { + LowerPriorityHelper(aChannel); + } +} + +// static +bool UrlClassifierCommon::IsAllowListed(nsIChannel* aChannel) { + nsCOMPtr<nsIHttpChannelInternal> channel = do_QueryInterface(aChannel); + if (NS_WARN_IF(!channel)) { + return false; + } + + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + + bool isAllowListed = false; + if (StaticPrefs::channelclassifier_allowlist_example()) { + UC_LOG( + ("UrlClassifierCommon::IsAllowListed - " + "check allowlisting test domain on channel %p", + aChannel)); + + nsCOMPtr<nsIIOService> ios = components::IO::Service(); + if (NS_WARN_IF(!ios)) { + return false; + } + + nsCOMPtr<nsIURI> uri; + nsresult rv = ios->NewURI("http://allowlisted.example.com"_ns, nullptr, + nullptr, getter_AddRefs(uri)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return false; + } + nsCOMPtr<nsIPrincipal> cbAllowListPrincipal = + BasePrincipal::CreateContentPrincipal(uri, + loadInfo->GetOriginAttributes()); + + rv = ContentBlockingAllowList::Check( + cbAllowListPrincipal, NS_UsePrivateBrowsing(aChannel), isAllowListed); + if (NS_WARN_IF(NS_FAILED(rv))) { + return false; + } + } else { + nsCOMPtr<nsICookieJarSettings> cookieJarSettings; + MOZ_ALWAYS_SUCCEEDS( + loadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings))); + isAllowListed = cookieJarSettings->GetIsOnContentBlockingAllowList(); + } + + if (isAllowListed) { + UC_LOG(("UrlClassifierCommon::IsAllowListed - user override on channel %p", + aChannel)); + } + + return isAllowListed; +} + +// static +bool UrlClassifierCommon::IsTrackingClassificationFlag(uint32_t aFlag, + bool aIsPrivate) { + bool isLevel2ListEnabled = + aIsPrivate + ? StaticPrefs::privacy_annotate_channels_strict_list_pbmode_enabled() + : StaticPrefs::privacy_annotate_channels_strict_list_enabled(); + + if (isLevel2ListEnabled && + (aFlag & nsIClassifiedChannel::ClassificationFlags:: + CLASSIFIED_ANY_STRICT_TRACKING)) { + return true; + } + + if (StaticPrefs::privacy_socialtracking_block_cookies_enabled() && + IsSocialTrackingClassificationFlag(aFlag)) { + return true; + } + + return ( + aFlag & + nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_ANY_BASIC_TRACKING); +} + +// static +bool UrlClassifierCommon::IsSocialTrackingClassificationFlag(uint32_t aFlag) { + return (aFlag & nsIClassifiedChannel::ClassificationFlags:: + CLASSIFIED_ANY_SOCIAL_TRACKING) != 0; +} + +// static +bool UrlClassifierCommon::IsCryptominingClassificationFlag(uint32_t aFlag, + bool aIsPrivate) { + if (aFlag & + nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_CRYPTOMINING) { + return true; + } + + bool isLevel2ListEnabled = + aIsPrivate + ? StaticPrefs::privacy_annotate_channels_strict_list_pbmode_enabled() + : StaticPrefs::privacy_annotate_channels_strict_list_enabled(); + + if (isLevel2ListEnabled && + (aFlag & nsIClassifiedChannel::ClassificationFlags:: + CLASSIFIED_CRYPTOMINING_CONTENT)) { + return true; + } + + return false; +} + +void UrlClassifierCommon::TablesToString(const nsTArray<nsCString>& aList, + nsACString& aString) { + // Truncate and append rather than assigning because that's more efficient if + // aString is an nsAutoCString. + aString.Truncate(); + StringJoinAppend(aString, ","_ns, aList); +} + +uint32_t UrlClassifierCommon::TablesToClassificationFlags( + const nsTArray<nsCString>& aList, + const std::vector<ClassificationData>& aData, uint32_t aDefaultFlag) { + uint32_t flags = 0; + for (const nsCString& table : aList) { + flags |= TableToClassificationFlag(table, aData); + } + + if (flags == 0) { + flags |= aDefaultFlag; + } + + return flags; +} + +uint32_t UrlClassifierCommon::TableToClassificationFlag( + const nsACString& aTable, const std::vector<ClassificationData>& aData) { + for (const ClassificationData& data : aData) { + if (StringBeginsWith(aTable, data.mPrefix)) { + return data.mFlag; + } + } + + return 0; +} + +/* static */ +bool UrlClassifierCommon::IsPassiveContent(nsIChannel* aChannel) { + MOZ_ASSERT(aChannel); + + nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo(); + ExtContentPolicyType contentType = loadInfo->GetExternalContentPolicyType(); + + // Return true if aChannel is loading passive display content, as + // defined by the mixed content blocker. + // https://searchfox.org/mozilla-central/rev/c80fa7258c935223fe319c5345b58eae85d4c6ae/dom/security/nsMixedContentBlocker.cpp#532 + return contentType == ExtContentPolicy::TYPE_IMAGE || + contentType == ExtContentPolicy::TYPE_MEDIA || + (contentType == ExtContentPolicy::TYPE_OBJECT_SUBREQUEST && + !StaticPrefs::security_mixed_content_block_object_subrequest()); +} + +} // namespace net +} // namespace mozilla |