gecko-dev/caps/OriginAttributes.cpp
2019-05-03 17:13:17 +00:00

301 lines
8.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 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 "mozilla/OriginAttributes.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/URLSearchParams.h"
#include "mozilla/dom/quota/QuotaManager.h"
#include "nsIEffectiveTLDService.h"
#include "nsIURI.h"
#include "nsURLHelper.h"
namespace mozilla {
using dom::URLParams;
bool OriginAttributes::sFirstPartyIsolation = false;
bool OriginAttributes::sRestrictedOpenerAccess = false;
bool OriginAttributes::sBlockPostMessageForFPI = false;
void OriginAttributes::InitPrefs() {
MOZ_ASSERT(NS_IsMainThread());
static bool sInited = false;
if (!sInited) {
sInited = true;
Preferences::AddBoolVarCache(&sFirstPartyIsolation,
"privacy.firstparty.isolate");
Preferences::AddBoolVarCache(
&sRestrictedOpenerAccess,
"privacy.firstparty.isolate.restrict_opener_access");
Preferences::AddBoolVarCache(
&sBlockPostMessageForFPI,
"privacy.firstparty.isolate.block_post_message");
}
}
void OriginAttributes::SetFirstPartyDomain(const bool aIsTopLevelDocument,
nsIURI* aURI, bool aForced) {
bool isFirstPartyEnabled = IsFirstPartyEnabled();
// If the prefs are off or this is not a top level load, bail out.
if ((!isFirstPartyEnabled || !aIsTopLevelDocument) && !aForced) {
return;
}
nsCOMPtr<nsIEffectiveTLDService> tldService =
do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
MOZ_ASSERT(tldService);
if (!tldService) {
return;
}
nsAutoCString baseDomain;
nsresult rv = tldService->GetBaseDomain(aURI, 0, baseDomain);
if (NS_SUCCEEDED(rv)) {
mFirstPartyDomain = NS_ConvertUTF8toUTF16(baseDomain);
return;
}
if (rv == NS_ERROR_HOST_IS_IP_ADDRESS) {
// If the host is an IPv4/IPv6 address, we still accept it as a
// valid firstPartyDomain.
nsAutoCString ipAddr;
rv = aURI->GetHost(ipAddr);
NS_ENSURE_SUCCESS_VOID(rv);
if (net_IsValidIPv6Addr(ipAddr)) {
// According to RFC2732, the host of an IPv6 address should be an
// IPv6reference. The GetHost() of nsIURI will only return the IPv6
// address. So, we need to convert it back to IPv6reference here.
mFirstPartyDomain.Truncate();
mFirstPartyDomain.AssignLiteral("[");
mFirstPartyDomain.Append(NS_ConvertUTF8toUTF16(ipAddr));
mFirstPartyDomain.AppendLiteral("]");
} else {
mFirstPartyDomain = NS_ConvertUTF8toUTF16(ipAddr);
}
return;
}
// Saving isInsufficientDomainLevels before rv is overwritten.
bool isInsufficientDomainLevels = (rv == NS_ERROR_INSUFFICIENT_DOMAIN_LEVELS);
nsAutoCString scheme;
rv = aURI->GetScheme(scheme);
NS_ENSURE_SUCCESS_VOID(rv);
if (scheme.EqualsLiteral("about")) {
mFirstPartyDomain.AssignLiteral(ABOUT_URI_FIRST_PARTY_DOMAIN);
return;
}
nsCOMPtr<nsIPrincipal> blobPrincipal;
if (dom::BlobURLProtocolHandler::GetBlobURLPrincipal(
aURI, getter_AddRefs(blobPrincipal))) {
MOZ_ASSERT(blobPrincipal);
mFirstPartyDomain = blobPrincipal->OriginAttributesRef().mFirstPartyDomain;
return;
}
if (isInsufficientDomainLevels) {
nsAutoCString publicSuffix;
rv = tldService->GetPublicSuffix(aURI, publicSuffix);
if (NS_SUCCEEDED(rv)) {
mFirstPartyDomain = NS_ConvertUTF8toUTF16(publicSuffix);
}
return;
}
}
void OriginAttributes::SetFirstPartyDomain(const bool aIsTopLevelDocument,
const nsACString& aDomain) {
bool isFirstPartyEnabled = IsFirstPartyEnabled();
// If the pref is off or this is not a top level load, bail out.
if (!isFirstPartyEnabled || !aIsTopLevelDocument) {
return;
}
mFirstPartyDomain = NS_ConvertUTF8toUTF16(aDomain);
}
void OriginAttributes::CreateSuffix(nsACString& aStr) const {
URLParams params;
nsAutoString value;
//
// Important: While serializing any string-valued attributes, perform a
// release-mode assertion to make sure that they don't contain characters that
// will break the quota manager when it uses the serialization for file
// naming.
//
if (mInIsolatedMozBrowser) {
params.Set(NS_LITERAL_STRING("inBrowser"), NS_LITERAL_STRING("1"));
}
if (mUserContextId != nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID) {
value.Truncate();
value.AppendInt(mUserContextId);
params.Set(NS_LITERAL_STRING("userContextId"), value);
}
if (mPrivateBrowsingId) {
value.Truncate();
value.AppendInt(mPrivateBrowsingId);
params.Set(NS_LITERAL_STRING("privateBrowsingId"), value);
}
if (!mFirstPartyDomain.IsEmpty()) {
nsAutoString sanitizedFirstPartyDomain(mFirstPartyDomain);
sanitizedFirstPartyDomain.ReplaceChar(
dom::quota::QuotaManager::kReplaceChars, '+');
params.Set(NS_LITERAL_STRING("firstPartyDomain"),
sanitizedFirstPartyDomain);
}
aStr.Truncate();
params.Serialize(value);
if (!value.IsEmpty()) {
aStr.AppendLiteral("^");
aStr.Append(NS_ConvertUTF16toUTF8(value));
}
// In debug builds, check the whole string for illegal characters too (just in
// case).
#ifdef DEBUG
nsAutoCString str;
str.Assign(aStr);
MOZ_ASSERT(str.FindCharInSet(dom::quota::QuotaManager::kReplaceChars) ==
kNotFound);
#endif
}
void OriginAttributes::CreateAnonymizedSuffix(nsACString& aStr) const {
OriginAttributes attrs = *this;
if (!attrs.mFirstPartyDomain.IsEmpty()) {
attrs.mFirstPartyDomain.AssignLiteral("_anonymizedFirstPartyDomain_");
}
attrs.CreateSuffix(aStr);
}
namespace {
class MOZ_STACK_CLASS PopulateFromSuffixIterator final
: public URLParams::ForEachIterator {
public:
explicit PopulateFromSuffixIterator(OriginAttributes* aOriginAttributes)
: mOriginAttributes(aOriginAttributes) {
MOZ_ASSERT(aOriginAttributes);
// If mPrivateBrowsingId is passed in as >0 and is not present in the
// suffix, then it will remain >0 when it should be 0 according to the
// suffix. Set to 0 before iterating to fix this.
mOriginAttributes->mPrivateBrowsingId = 0;
}
bool URLParamsIterator(const nsAString& aName,
const nsAString& aValue) override {
if (aName.EqualsLiteral("inBrowser")) {
if (!aValue.EqualsLiteral("1")) {
return false;
}
mOriginAttributes->mInIsolatedMozBrowser = true;
return true;
}
if (aName.EqualsLiteral("addonId") || aName.EqualsLiteral("appId")) {
// No longer supported. Silently ignore so that legacy origin strings
// don't cause failures.
return true;
}
if (aName.EqualsLiteral("userContextId")) {
nsresult rv;
int64_t val = aValue.ToInteger64(&rv);
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(val <= UINT32_MAX, false);
mOriginAttributes->mUserContextId = static_cast<uint32_t>(val);
return true;
}
if (aName.EqualsLiteral("privateBrowsingId")) {
nsresult rv;
int64_t val = aValue.ToInteger64(&rv);
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(val >= 0 && val <= UINT32_MAX, false);
mOriginAttributes->mPrivateBrowsingId = static_cast<uint32_t>(val);
return true;
}
if (aName.EqualsLiteral("firstPartyDomain")) {
MOZ_RELEASE_ASSERT(mOriginAttributes->mFirstPartyDomain.IsEmpty());
mOriginAttributes->mFirstPartyDomain.Assign(aValue);
return true;
}
// No other attributes are supported.
return false;
}
private:
OriginAttributes* mOriginAttributes;
};
} // namespace
bool OriginAttributes::PopulateFromSuffix(const nsACString& aStr) {
if (aStr.IsEmpty()) {
return true;
}
if (aStr[0] != '^') {
return false;
}
PopulateFromSuffixIterator iterator(this);
return URLParams::Parse(Substring(aStr, 1, aStr.Length() - 1), iterator);
}
bool OriginAttributes::PopulateFromOrigin(const nsACString& aOrigin,
nsACString& aOriginNoSuffix) {
// RFindChar is only available on nsCString.
nsCString origin(aOrigin);
int32_t pos = origin.RFindChar('^');
if (pos == kNotFound) {
aOriginNoSuffix = origin;
return true;
}
aOriginNoSuffix = Substring(origin, 0, pos);
return PopulateFromSuffix(Substring(origin, pos));
}
void OriginAttributes::SyncAttributesWithPrivateBrowsing(
bool aInPrivateBrowsing) {
mPrivateBrowsingId = aInPrivateBrowsing ? 1 : 0;
}
/* static */
bool OriginAttributes::IsPrivateBrowsing(const nsACString& aOrigin) {
nsAutoCString dummy;
OriginAttributes attrs;
if (NS_WARN_IF(!attrs.PopulateFromOrigin(aOrigin, dummy))) {
return false;
}
return !!attrs.mPrivateBrowsingId;
}
} // namespace mozilla