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gecko-dev/caps/nsPrincipal.cpp

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/* -*- 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 "nsPrincipal.h"
#include "mozIThirdPartyUtil.h"
#include "nscore.h"
#include "nsScriptSecurityManager.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "pratom.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsIStandardURL.h"
#include "nsIURIWithPrincipal.h"
#include "nsJSPrincipals.h"
#include "nsIEffectiveTLDService.h"
#include "nsIClassInfoImpl.h"
#include "nsIProtocolHandler.h"
#include "nsError.h"
#include "nsIContentSecurityPolicy.h"
#include "nsNetCID.h"
#include "jswrapper.h"
#include "mozilla/dom/nsCSPContext.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/Preferences.h"
#include "mozilla/HashFunctions.h"
using namespace mozilla;
static bool gIsWhitelistingTestDomains = false;
static bool gCodeBasePrincipalSupport = false;
static bool URIIsImmutable(nsIURI* aURI)
{
nsCOMPtr<nsIMutable> mutableObj(do_QueryInterface(aURI));
bool isMutable;
return
mutableObj &&
NS_SUCCEEDED(mutableObj->GetMutable(&isMutable)) &&
!isMutable;
}
NS_IMPL_CLASSINFO(nsPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
NS_PRINCIPAL_CID)
NS_IMPL_QUERY_INTERFACE_CI(nsPrincipal,
nsIPrincipal,
nsISerializable)
NS_IMPL_CI_INTERFACE_GETTER(nsPrincipal,
nsIPrincipal,
nsISerializable)
// Called at startup:
/* static */ void
nsPrincipal::InitializeStatics()
{
Preferences::AddBoolVarCache(
&gIsWhitelistingTestDomains,
"layout.css.unprefixing-service.include-test-domains");
Preferences::AddBoolVarCache(&gCodeBasePrincipalSupport,
"signed.applets.codebase_principal_support",
false);
}
nsPrincipal::nsPrincipal()
: mCodebaseImmutable(false)
, mDomainImmutable(false)
, mInitialized(false)
{ }
nsPrincipal::~nsPrincipal()
{
// let's clear the principal within the csp to avoid a tangling pointer
if (mCSP) {
static_cast<nsCSPContext*>(mCSP.get())->clearLoadingPrincipal();
}
}
nsresult
nsPrincipal::Init(nsIURI *aCodebase, const PrincipalOriginAttributes& aOriginAttributes)
{
NS_ENSURE_STATE(!mInitialized);
NS_ENSURE_ARG(aCodebase);
mInitialized = true;
mCodebase = NS_TryToMakeImmutable(aCodebase);
mCodebaseImmutable = URIIsImmutable(mCodebase);
mOriginAttributes = aOriginAttributes;
return NS_OK;
}
nsresult
nsPrincipal::GetScriptLocation(nsACString &aStr)
{
return mCodebase->GetSpec(aStr);
}
nsresult
nsPrincipal::GetOriginInternal(nsACString& aOrigin)
{
if (!mCodebase) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIURI> origin = NS_GetInnermostURI(mCodebase);
if (!origin) {
return NS_ERROR_FAILURE;
}
nsAutoCString hostPort;
// chrome: URLs don't have a meaningful origin, so make
// sure we just get the full spec for them.
// XXX this should be removed in favor of the solution in
// bug 160042.
bool isChrome;
nsresult rv = origin->SchemeIs("chrome", &isChrome);
if (NS_SUCCEEDED(rv) && !isChrome) {
rv = origin->GetAsciiHostPort(hostPort);
// Some implementations return an empty string, treat it as no support
// for asciiHost by that implementation.
if (hostPort.IsEmpty()) {
rv = NS_ERROR_FAILURE;
}
}
// We want the invariant that prinA.origin == prinB.origin i.f.f.
// prinA.equals(prinB). However, this requires that we impose certain constraints
// on the behavior and origin semantics of principals, and in particular, forbid
// creating origin strings for principals whose equality constraints are not
// expressible as strings (i.e. object equality). Moreover, we want to forbid URIs
// containing the magic "^" we use as a separating character for origin
// attributes.
//
// These constraints can generally be achieved by restricting .origin to
// nsIStandardURL-based URIs, but there are a few other URI schemes that we need
// to handle.
bool isBehaved;
if ((NS_SUCCEEDED(origin->SchemeIs("about", &isBehaved)) && isBehaved) ||
(NS_SUCCEEDED(origin->SchemeIs("moz-safe-about", &isBehaved)) && isBehaved) ||
(NS_SUCCEEDED(origin->SchemeIs("indexeddb", &isBehaved)) && isBehaved)) {
rv = origin->GetAsciiSpec(aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
// These URIs could technically contain a '^', but they never should.
if (NS_WARN_IF(aOrigin.FindChar('^', 0) != -1)) {
aOrigin.Truncate();
return NS_ERROR_FAILURE;
}
return NS_OK;
}
if (NS_SUCCEEDED(rv) && !isChrome) {
rv = origin->GetScheme(aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin.AppendLiteral("://");
aOrigin.Append(hostPort);
}
else {
// If we reached this branch, we can only create an origin if we have a nsIStandardURL.
// So, we query to a nsIStandardURL, and fail if we aren't an instance of an nsIStandardURL
// nsIStandardURLs have the good property of escaping the '^' character in their specs,
// which means that we can be sure that the caret character (which is reserved for delimiting
// the end of the spec, and the beginning of the origin attributes) is not present in the
// origin string
nsCOMPtr<nsIStandardURL> standardURL = do_QueryInterface(origin);
NS_ENSURE_TRUE(standardURL, NS_ERROR_FAILURE);
rv = origin->GetAsciiSpec(aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
bool
nsPrincipal::SubsumesInternal(nsIPrincipal* aOther,
BasePrincipal::DocumentDomainConsideration aConsideration)
{
MOZ_ASSERT(aOther);
// For nsPrincipal, Subsumes is equivalent to Equals.
if (aOther == this) {
return true;
}
// If either the subject or the object has changed its principal by
// explicitly setting document.domain then the other must also have
// done so in order to be considered the same origin. This prevents
// DNS spoofing based on document.domain (154930)
nsresult rv;
if (aConsideration == ConsiderDocumentDomain) {
// Get .domain on each principal.
nsCOMPtr<nsIURI> thisDomain, otherDomain;
GetDomain(getter_AddRefs(thisDomain));
aOther->GetDomain(getter_AddRefs(otherDomain));
// If either has .domain set, we have equality i.f.f. the domains match.
// Otherwise, we fall through to the non-document-domain-considering case.
if (thisDomain || otherDomain) {
return nsScriptSecurityManager::SecurityCompareURIs(thisDomain, otherDomain);
}
}
nsCOMPtr<nsIURI> otherURI;
rv = aOther->GetURI(getter_AddRefs(otherURI));
NS_ENSURE_SUCCESS(rv, false);
// Compare codebases.
return nsScriptSecurityManager::SecurityCompareURIs(mCodebase, otherURI);
}
NS_IMETHODIMP
nsPrincipal::GetURI(nsIURI** aURI)
{
if (mCodebaseImmutable) {
NS_ADDREF(*aURI = mCodebase);
return NS_OK;
}
if (!mCodebase) {
*aURI = nullptr;
return NS_OK;
}
return NS_EnsureSafeToReturn(mCodebase, aURI);
}
bool
nsPrincipal::MayLoadInternal(nsIURI* aURI)
{
// See if aURI is something like a Blob URI that is actually associated with
// a principal.
nsCOMPtr<nsIURIWithPrincipal> uriWithPrin = do_QueryInterface(aURI);
nsCOMPtr<nsIPrincipal> uriPrin;
if (uriWithPrin) {
uriWithPrin->GetPrincipal(getter_AddRefs(uriPrin));
}
if (uriPrin) {
return nsIPrincipal::Subsumes(uriPrin);
}
// If this principal is associated with an addon, check whether that addon
// has been given permission to load from this domain.
if (AddonAllowsLoad(aURI)) {
return true;
}
if (nsScriptSecurityManager::SecurityCompareURIs(mCodebase, aURI)) {
return true;
}
// If strict file origin policy is in effect, local files will always fail
// SecurityCompareURIs unless they are identical. Explicitly check file origin
// policy, in that case.
if (nsScriptSecurityManager::GetStrictFileOriginPolicy() &&
NS_URIIsLocalFile(aURI) &&
NS_RelaxStrictFileOriginPolicy(aURI, mCodebase)) {
return true;
}
return false;
}
void
nsPrincipal::SetURI(nsIURI* aURI)
{
mCodebase = NS_TryToMakeImmutable(aURI);
mCodebaseImmutable = URIIsImmutable(mCodebase);
}
NS_IMETHODIMP
nsPrincipal::GetHashValue(uint32_t* aValue)
{
NS_PRECONDITION(mCodebase, "Need a codebase");
*aValue = nsScriptSecurityManager::HashPrincipalByOrigin(this);
return NS_OK;
}
NS_IMETHODIMP
nsPrincipal::GetDomain(nsIURI** aDomain)
{
if (!mDomain) {
*aDomain = nullptr;
return NS_OK;
}
if (mDomainImmutable) {
NS_ADDREF(*aDomain = mDomain);
return NS_OK;
}
return NS_EnsureSafeToReturn(mDomain, aDomain);
}
NS_IMETHODIMP
nsPrincipal::SetDomain(nsIURI* aDomain)
{
mDomain = NS_TryToMakeImmutable(aDomain);
mDomainImmutable = URIIsImmutable(mDomain);
// Recompute all wrappers between compartments using this principal and other
// non-chrome compartments.
AutoSafeJSContext cx;
JSPrincipals *principals = nsJSPrincipals::get(static_cast<nsIPrincipal*>(this));
bool success = js::RecomputeWrappers(cx, js::ContentCompartmentsOnly(),
js::CompartmentsWithPrincipals(principals));
NS_ENSURE_TRUE(success, NS_ERROR_FAILURE);
success = js::RecomputeWrappers(cx, js::CompartmentsWithPrincipals(principals),
js::ContentCompartmentsOnly());
NS_ENSURE_TRUE(success, NS_ERROR_FAILURE);
return NS_OK;
}
NS_IMETHODIMP
nsPrincipal::GetBaseDomain(nsACString& aBaseDomain)
{
// For a file URI, we return the file path.
if (NS_URIIsLocalFile(mCodebase)) {
nsCOMPtr<nsIURL> url = do_QueryInterface(mCodebase);
if (url) {
return url->GetFilePath(aBaseDomain);
}
}
bool hasNoRelativeFlag;
nsresult rv = NS_URIChainHasFlags(mCodebase,
nsIProtocolHandler::URI_NORELATIVE,
&hasNoRelativeFlag);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (hasNoRelativeFlag) {
return mCodebase->GetSpec(aBaseDomain);
}
// For everything else, we ask the TLD service via
// the ThirdPartyUtil.
nsCOMPtr<mozIThirdPartyUtil> thirdPartyUtil =
do_GetService(THIRDPARTYUTIL_CONTRACTID);
if (thirdPartyUtil) {
return thirdPartyUtil->GetBaseDomain(mCodebase, aBaseDomain);
}
return NS_OK;
}
NS_IMETHODIMP
nsPrincipal::Read(nsIObjectInputStream* aStream)
{
nsCOMPtr<nsISupports> supports;
nsCOMPtr<nsIURI> codebase;
nsresult rv = NS_ReadOptionalObject(aStream, true, getter_AddRefs(supports));
if (NS_FAILED(rv)) {
return rv;
}
codebase = do_QueryInterface(supports);
nsCOMPtr<nsIURI> domain;
rv = NS_ReadOptionalObject(aStream, true, getter_AddRefs(supports));
if (NS_FAILED(rv)) {
return rv;
}
domain = do_QueryInterface(supports);
nsAutoCString suffix;
rv = aStream->ReadCString(suffix);
NS_ENSURE_SUCCESS(rv, rv);
PrincipalOriginAttributes attrs;
bool ok = attrs.PopulateFromSuffix(suffix);
NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
rv = NS_ReadOptionalObject(aStream, true, getter_AddRefs(supports));
NS_ENSURE_SUCCESS(rv, rv);
rv = Init(codebase, attrs);
NS_ENSURE_SUCCESS(rv, rv);
mCSP = do_QueryInterface(supports, &rv);
// make sure setRequestContext is called after Init(),
// to make sure the principals URI been initalized.
if (mCSP) {
mCSP->SetRequestContext(nullptr, this);
}
SetDomain(domain);
return NS_OK;
}
NS_IMETHODIMP
nsPrincipal::Write(nsIObjectOutputStream* aStream)
{
NS_ENSURE_STATE(mCodebase);
nsresult rv = NS_WriteOptionalCompoundObject(aStream, mCodebase, NS_GET_IID(nsIURI),
true);
if (NS_FAILED(rv)) {
return rv;
}
rv = NS_WriteOptionalCompoundObject(aStream, mDomain, NS_GET_IID(nsIURI),
true);
if (NS_FAILED(rv)) {
return rv;
}
nsAutoCString suffix;
OriginAttributesRef().CreateSuffix(suffix);
rv = aStream->WriteStringZ(suffix.get());
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_WriteOptionalCompoundObject(aStream, mCSP,
NS_GET_IID(nsIContentSecurityPolicy),
true);
if (NS_FAILED(rv)) {
return rv;
}
// mCodebaseImmutable and mDomainImmutable will be recomputed based
// on the deserialized URIs in Read().
return NS_OK;
}
// Helper-function to indicate whether the CSS Unprefixing Service
// whitelist should include dummy domains that are only intended for
// use in testing. (Controlled by a pref.)
static inline bool
IsWhitelistingTestDomains()
{
return gIsWhitelistingTestDomains;
}
// Checks if the given URI's host is on our "full domain" whitelist
// (i.e. if it's an exact match against a domain that needs unprefixing)
static bool
IsOnFullDomainWhitelist(nsIURI* aURI)
{
nsAutoCString hostStr;
nsresult rv = aURI->GetHost(hostStr);
NS_ENSURE_SUCCESS(rv, false);
// NOTE: This static whitelist is expected to be short. If that changes,
// we should consider a different representation; e.g. hash-set, prefix tree.
static const nsLiteralCString sFullDomainsOnWhitelist[] = {
// 0th entry only active when testing:
NS_LITERAL_CSTRING("test1.example.org"),
NS_LITERAL_CSTRING("map.baidu.com"),
NS_LITERAL_CSTRING("3g.163.com"),
NS_LITERAL_CSTRING("3glogo.gtimg.com"), // for 3g.163.com
NS_LITERAL_CSTRING("info.3g.qq.com"), // for 3g.qq.com
NS_LITERAL_CSTRING("3gimg.qq.com"), // for 3g.qq.com
NS_LITERAL_CSTRING("img.m.baidu.com"), // for [shucheng|ks].baidu.com
NS_LITERAL_CSTRING("m.mogujie.com"),
NS_LITERAL_CSTRING("touch.qunar.com"),
NS_LITERAL_CSTRING("mjs.sinaimg.cn"), // for sina.cn
NS_LITERAL_CSTRING("static.qiyi.com"), // for m.iqiyi.com
NS_LITERAL_CSTRING("cdn.kuaidi100.com"), // for m.kuaidi100.com
NS_LITERAL_CSTRING("m.pc6.com"),
NS_LITERAL_CSTRING("m.haosou.com"),
NS_LITERAL_CSTRING("m.mi.com"),
NS_LITERAL_CSTRING("wappass.baidu.com"),
NS_LITERAL_CSTRING("m.video.baidu.com"),
NS_LITERAL_CSTRING("m.video.baidu.com"),
NS_LITERAL_CSTRING("imgcache.gtimg.cn"), // for m.v.qq.com
NS_LITERAL_CSTRING("s.tabelog.jp"),
NS_LITERAL_CSTRING("s.yimg.jp"), // for s.tabelog.jp
NS_LITERAL_CSTRING("i.yimg.jp"), // for *.yahoo.co.jp
NS_LITERAL_CSTRING("ai.yimg.jp"), // for *.yahoo.co.jp
NS_LITERAL_CSTRING("m.finance.yahoo.co.jp"),
NS_LITERAL_CSTRING("daily.c.yimg.jp"), // for sp.daily.co.jp
NS_LITERAL_CSTRING("stat100.ameba.jp"), // for ameblo.jp
NS_LITERAL_CSTRING("user.ameba.jp"), // for ameblo.jp
NS_LITERAL_CSTRING("www.goo.ne.jp"),
NS_LITERAL_CSTRING("x.gnst.jp"), // for mobile.gnavi.co.jp
NS_LITERAL_CSTRING("c.x.gnst.jp"), // for mobile.gnavi.co.jp
NS_LITERAL_CSTRING("www.smbc-card.com"),
NS_LITERAL_CSTRING("static.card.jp.rakuten-static.com"), // for rakuten-card.co.jp
NS_LITERAL_CSTRING("img.travel.rakuten.co.jp"), // for travel.rakuten.co.jp
NS_LITERAL_CSTRING("img.mixi.net"), // for mixi.jp
NS_LITERAL_CSTRING("girlschannel.net"),
NS_LITERAL_CSTRING("www.fancl.co.jp"),
NS_LITERAL_CSTRING("s.cosme.net"),
NS_LITERAL_CSTRING("www.sapporobeer.jp"),
NS_LITERAL_CSTRING("www.mapion.co.jp"),
NS_LITERAL_CSTRING("touch.navitime.co.jp"),
NS_LITERAL_CSTRING("sp.mbga.jp"),
NS_LITERAL_CSTRING("ava-a.sp.mbga.jp"), // for sp.mbga.jp
NS_LITERAL_CSTRING("www.ntv.co.jp"),
NS_LITERAL_CSTRING("mobile.suntory.co.jp"), // for suntory.jp
NS_LITERAL_CSTRING("www.aeonsquare.net"),
NS_LITERAL_CSTRING("mw.nikkei.com"),
NS_LITERAL_CSTRING("www.nhk.or.jp"),
NS_LITERAL_CSTRING("www.tokyo-sports.co.jp"),
NS_LITERAL_CSTRING("www.bellemaison.jp"),
NS_LITERAL_CSTRING("www.kuronekoyamato.co.jp"),
NS_LITERAL_CSTRING("formassist.jp"), // for orico.jp
NS_LITERAL_CSTRING("sp.m.reuters.co.jp"),
NS_LITERAL_CSTRING("www.atre.co.jp"),
NS_LITERAL_CSTRING("www.jtb.co.jp"),
NS_LITERAL_CSTRING("www.sharp.co.jp"),
NS_LITERAL_CSTRING("www.biccamera.com"),
NS_LITERAL_CSTRING("weathernews.jp"),
NS_LITERAL_CSTRING("cache.ymail.jp"), // for www.yamada-denkiweb.com
};
static const size_t sNumFullDomainsOnWhitelist =
MOZ_ARRAY_LENGTH(sFullDomainsOnWhitelist);
// Skip 0th (dummy) entry in whitelist, unless a pref is enabled.
const size_t firstWhitelistIdx = IsWhitelistingTestDomains() ? 0 : 1;
for (size_t i = firstWhitelistIdx; i < sNumFullDomainsOnWhitelist; ++i) {
if (hostStr == sFullDomainsOnWhitelist[i]) {
return true;
}
}
return false;
}
// Checks if the given URI's host is on our "base domain" whitelist
// (i.e. if it's a subdomain of some host that we've whitelisted as needing
// unprefixing for all its subdomains)
static bool
IsOnBaseDomainWhitelist(nsIURI* aURI)
{
static const nsLiteralCString sBaseDomainsOnWhitelist[] = {
// 0th entry only active when testing:
NS_LITERAL_CSTRING("test2.example.org"),
NS_LITERAL_CSTRING("tbcdn.cn"), // for m.taobao.com
NS_LITERAL_CSTRING("alicdn.com"), // for m.taobao.com
NS_LITERAL_CSTRING("dpfile.com"), // for m.dianping.com
NS_LITERAL_CSTRING("hao123img.com"), // for hao123.com
NS_LITERAL_CSTRING("tabelog.k-img.com"), // for s.tabelog.com
NS_LITERAL_CSTRING("tsite.jp"), // for *.tsite.jp
};
static const size_t sNumBaseDomainsOnWhitelist =
MOZ_ARRAY_LENGTH(sBaseDomainsOnWhitelist);
nsCOMPtr<nsIEffectiveTLDService> tldService =
do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
if (tldService) {
// Skip 0th test-entry in whitelist, unless the testing pref is enabled.
const size_t firstWhitelistIdx = IsWhitelistingTestDomains() ? 0 : 1;
// Right now, the test base-domain "test2.example.org" is the only entry in
// its whitelist with a nonzero "depth". So we'll only bother going beyond
// 0 depth (to 1) if that entry is enabled. (No point in slowing down the
// normal codepath, for the benefit of a disabled test domain.) If we add a
// "real" base-domain with a depth of >= 1 to our whitelist, we can get rid
// of this conditional & just make this a static variable.
const uint32_t maxSubdomainDepth = IsWhitelistingTestDomains() ? 1 : 0;
for (uint32_t subdomainDepth = 0;
subdomainDepth <= maxSubdomainDepth; ++subdomainDepth) {
// Get the base domain (to depth |subdomainDepth|) from passed-in URI:
nsAutoCString baseDomainStr;
nsresult rv = tldService->GetBaseDomain(aURI, subdomainDepth,
baseDomainStr);
if (NS_FAILED(rv)) {
// aURI doesn't have |subdomainDepth| levels of subdomains. If we got
// here without a match yet, then aURI is not on our whitelist.
return false;
}
// Compare the base domain against each entry in our whitelist:
for (size_t i = firstWhitelistIdx; i < sNumBaseDomainsOnWhitelist; ++i) {
if (baseDomainStr == sBaseDomainsOnWhitelist[i]) {
return true;
}
}
}
}
return false;
}
// The actual (non-cached) implementation of IsOnCSSUnprefixingWhitelist():
static bool
IsOnCSSUnprefixingWhitelistImpl(nsIURI* aURI)
{
// Check scheme, so we can drop any non-HTTP/HTTPS URIs right away
nsAutoCString schemeStr;
nsresult rv = aURI->GetScheme(schemeStr);
NS_ENSURE_SUCCESS(rv, false);
// Only proceed if scheme is "http" or "https"
if (!(StringBeginsWith(schemeStr, NS_LITERAL_CSTRING("http")) &&
(schemeStr.Length() == 4 ||
(schemeStr.Length() == 5 && schemeStr[4] == 's')))) {
return false;
}
return (IsOnFullDomainWhitelist(aURI) ||
IsOnBaseDomainWhitelist(aURI));
}
bool
nsPrincipal::IsOnCSSUnprefixingWhitelist()
{
if (mIsOnCSSUnprefixingWhitelist.isNothing()) {
// Value not cached -- perform our lazy whitelist-check.
// (NOTE: If our URI is mutable, we just assume it's not on the whitelist,
// since our caching strategy won't work. This isn't expected to be common.)
mIsOnCSSUnprefixingWhitelist.emplace(
mCodebaseImmutable &&
IsOnCSSUnprefixingWhitelistImpl(mCodebase));
}
return *mIsOnCSSUnprefixingWhitelist;
}
/************************************************************************************************************************/
NS_IMPL_CLASSINFO(nsExpandedPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
NS_EXPANDEDPRINCIPAL_CID)
NS_IMPL_QUERY_INTERFACE_CI(nsExpandedPrincipal,
nsIPrincipal,
nsIExpandedPrincipal)
NS_IMPL_CI_INTERFACE_GETTER(nsExpandedPrincipal,
nsIPrincipal,
nsIExpandedPrincipal)
struct OriginComparator
{
bool LessThan(nsIPrincipal* a, nsIPrincipal* b) const
{
nsAutoCString originA;
nsresult rv = a->GetOrigin(originA);
NS_ENSURE_SUCCESS(rv, false);
nsAutoCString originB;
rv = b->GetOrigin(originB);
NS_ENSURE_SUCCESS(rv, false);
return originA < originB;
}
bool Equals(nsIPrincipal* a, nsIPrincipal* b) const
{
nsAutoCString originA;
nsresult rv = a->GetOrigin(originA);
NS_ENSURE_SUCCESS(rv, false);
nsAutoCString originB;
rv = b->GetOrigin(originB);
NS_ENSURE_SUCCESS(rv, false);
return a == b;
}
};
nsExpandedPrincipal::nsExpandedPrincipal(nsTArray<nsCOMPtr<nsIPrincipal>> &aWhiteList,
const PrincipalOriginAttributes& aAttrs)
{
// We force the principals to be sorted by origin so that nsExpandedPrincipal
// origins can have a canonical form.
OriginComparator c;
for (size_t i = 0; i < aWhiteList.Length(); ++i) {
mPrincipals.InsertElementSorted(aWhiteList[i], c);
}
mOriginAttributes = aAttrs;
}
nsExpandedPrincipal::~nsExpandedPrincipal()
{ }
NS_IMETHODIMP
nsExpandedPrincipal::GetDomain(nsIURI** aDomain)
{
*aDomain = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsExpandedPrincipal::SetDomain(nsIURI* aDomain)
{
return NS_OK;
}
nsresult
nsExpandedPrincipal::GetOriginInternal(nsACString& aOrigin)
{
aOrigin.AssignLiteral("[Expanded Principal [");
for (size_t i = 0; i < mPrincipals.Length(); ++i) {
if (i != 0) {
aOrigin.AppendLiteral(", ");
}
nsAutoCString subOrigin;
nsresult rv = mPrincipals.ElementAt(i)->GetOrigin(subOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin.Append(subOrigin);
}
aOrigin.Append("]]");
return NS_OK;
}
bool
nsExpandedPrincipal::SubsumesInternal(nsIPrincipal* aOther,
BasePrincipal::DocumentDomainConsideration aConsideration)
{
// If aOther is an ExpandedPrincipal too, we break it down into its component
// nsIPrincipals, and check subsumes on each one.
nsCOMPtr<nsIExpandedPrincipal> expanded = do_QueryInterface(aOther);
if (expanded) {
nsTArray< nsCOMPtr<nsIPrincipal> >* otherList;
expanded->GetWhiteList(&otherList);
for (uint32_t i = 0; i < otherList->Length(); ++i){
// Use SubsumesInternal rather than Subsumes here, since OriginAttribute
// checks are only done between non-expanded sub-principals, and we don't
// need to incur the extra virtual call overhead.
if (!SubsumesInternal((*otherList)[i], aConsideration)) {
return false;
}
}
return true;
}
// We're dealing with a regular principal. One of our principals must subsume
// it.
for (uint32_t i = 0; i < mPrincipals.Length(); ++i) {
if (Cast(mPrincipals[i])->Subsumes(aOther, aConsideration)) {
return true;
}
}
return false;
}
bool
nsExpandedPrincipal::MayLoadInternal(nsIURI* uri)
{
for (uint32_t i = 0; i < mPrincipals.Length(); ++i){
if (BasePrincipal::Cast(mPrincipals[i])->MayLoadInternal(uri)) {
return true;
}
}
return false;
}
NS_IMETHODIMP
nsExpandedPrincipal::GetHashValue(uint32_t* result)
{
MOZ_CRASH("extended principal should never be used as key in a hash map");
}
NS_IMETHODIMP
nsExpandedPrincipal::GetURI(nsIURI** aURI)
{
*aURI = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsExpandedPrincipal::GetWhiteList(nsTArray<nsCOMPtr<nsIPrincipal> >** aWhiteList)
{
*aWhiteList = &mPrincipals;
return NS_OK;
}
NS_IMETHODIMP
nsExpandedPrincipal::GetBaseDomain(nsACString& aBaseDomain)
{
return NS_ERROR_NOT_AVAILABLE;
}
bool
nsExpandedPrincipal::AddonHasPermission(const nsAString& aPerm)
{
for (size_t i = 0; i < mPrincipals.Length(); ++i) {
if (BasePrincipal::Cast(mPrincipals[i])->AddonHasPermission(aPerm)) {
return true;
}
}
return false;
}
bool
nsExpandedPrincipal::IsOnCSSUnprefixingWhitelist()
{
// CSS Unprefixing Whitelist is a per-origin thing; doesn't really make sense
// for an expanded principal. (And probably shouldn't be needed.)
return false;
}
nsresult
nsExpandedPrincipal::GetScriptLocation(nsACString& aStr)
{
aStr.Assign("[Expanded Principal [");
for (size_t i = 0; i < mPrincipals.Length(); ++i) {
if (i != 0) {
aStr.AppendLiteral(", ");
}
nsAutoCString spec;
nsresult rv =
nsJSPrincipals::get(mPrincipals.ElementAt(i))->GetScriptLocation(spec);
NS_ENSURE_SUCCESS(rv, rv);
aStr.Append(spec);
}
aStr.Append("]]");
return NS_OK;
}
//////////////////////////////////////////
// Methods implementing nsISerializable //
//////////////////////////////////////////
NS_IMETHODIMP
nsExpandedPrincipal::Read(nsIObjectInputStream* aStream)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsExpandedPrincipal::Write(nsIObjectOutputStream* aStream)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
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