mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-28 15:23:51 +00:00
25c0d10932
Sorry this is not a particularly easy patch to review. But it should be mostly straight-forward. I kept Document::Dispatch mostly for convenience, but could be cleaned-up too / changed by SchedulerGroup::Dispatch. Similarly maybe that can just be NS_DispatchToMainThread if we add an NS_IsMainThread check there or something (to preserve shutdown semantics). Differential Revision: https://phabricator.services.mozilla.com/D190450
2049 lines
72 KiB
C++
2049 lines
72 KiB
C++
/* -*- 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 <string>
|
||
#include <unordered_set>
|
||
|
||
#include "nsCOMPtr.h"
|
||
#include "nsContentPolicyUtils.h"
|
||
#include "nsContentUtils.h"
|
||
#include "nsCSPContext.h"
|
||
#include "nsCSPParser.h"
|
||
#include "nsCSPService.h"
|
||
#include "nsGlobalWindowOuter.h"
|
||
#include "nsError.h"
|
||
#include "nsIAsyncVerifyRedirectCallback.h"
|
||
#include "nsIClassInfoImpl.h"
|
||
#include "mozilla/dom/Document.h"
|
||
#include "nsIHttpChannel.h"
|
||
#include "nsIInterfaceRequestor.h"
|
||
#include "nsIInterfaceRequestorUtils.h"
|
||
#include "nsIObjectInputStream.h"
|
||
#include "nsIObjectOutputStream.h"
|
||
#include "nsIObserver.h"
|
||
#include "nsIObserverService.h"
|
||
#include "nsIStringStream.h"
|
||
#include "nsISupportsPrimitives.h"
|
||
#include "nsIUploadChannel.h"
|
||
#include "nsIURIMutator.h"
|
||
#include "nsIScriptError.h"
|
||
#include "nsMimeTypes.h"
|
||
#include "nsNetUtil.h"
|
||
#include "nsIContentPolicy.h"
|
||
#include "nsSupportsPrimitives.h"
|
||
#include "nsThreadUtils.h"
|
||
#include "nsString.h"
|
||
#include "nsScriptSecurityManager.h"
|
||
#include "nsStringStream.h"
|
||
#include "mozilla/Logging.h"
|
||
#include "mozilla/Preferences.h"
|
||
#include "mozilla/StaticPrefs_security.h"
|
||
#include "mozilla/dom/CSPReportBinding.h"
|
||
#include "mozilla/dom/CSPDictionariesBinding.h"
|
||
#include "mozilla/ipc/PBackgroundSharedTypes.h"
|
||
#include "mozilla/dom/WindowGlobalParent.h"
|
||
#include "nsINetworkInterceptController.h"
|
||
#include "nsSandboxFlags.h"
|
||
#include "nsIScriptElement.h"
|
||
#include "nsIEventTarget.h"
|
||
#include "mozilla/dom/DocGroup.h"
|
||
#include "mozilla/dom/Element.h"
|
||
#include "nsXULAppAPI.h"
|
||
#include "nsJSUtils.h"
|
||
|
||
using namespace mozilla;
|
||
using namespace mozilla::dom;
|
||
using namespace mozilla::ipc;
|
||
|
||
static LogModule* GetCspContextLog() {
|
||
static LazyLogModule gCspContextPRLog("CSPContext");
|
||
return gCspContextPRLog;
|
||
}
|
||
|
||
#define CSPCONTEXTLOG(args) \
|
||
MOZ_LOG(GetCspContextLog(), mozilla::LogLevel::Debug, args)
|
||
#define CSPCONTEXTLOGENABLED() \
|
||
MOZ_LOG_TEST(GetCspContextLog(), mozilla::LogLevel::Debug)
|
||
|
||
static LogModule* GetCspOriginLogLog() {
|
||
static LazyLogModule gCspOriginPRLog("CSPOrigin");
|
||
return gCspOriginPRLog;
|
||
}
|
||
|
||
#define CSPORIGINLOG(args) \
|
||
MOZ_LOG(GetCspOriginLogLog(), mozilla::LogLevel::Debug, args)
|
||
#define CSPORIGINLOGENABLED() \
|
||
MOZ_LOG_TEST(GetCspOriginLogLog(), mozilla::LogLevel::Debug)
|
||
|
||
#ifdef DEBUG
|
||
/**
|
||
* This function is only used for verification purposes within
|
||
* GatherSecurityPolicyViolationEventData.
|
||
*/
|
||
static bool ValidateDirectiveName(const nsAString& aDirective) {
|
||
static const auto directives = []() {
|
||
std::unordered_set<std::string> directives;
|
||
constexpr size_t dirLen =
|
||
sizeof(CSPStrDirectives) / sizeof(CSPStrDirectives[0]);
|
||
for (size_t i = 0; i < dirLen; ++i) {
|
||
directives.insert(CSPStrDirectives[i]);
|
||
}
|
||
return directives;
|
||
}();
|
||
|
||
nsAutoString directive(aDirective);
|
||
auto itr = directives.find(NS_ConvertUTF16toUTF8(directive).get());
|
||
return itr != directives.end();
|
||
}
|
||
#endif // DEBUG
|
||
|
||
static void BlockedContentSourceToString(
|
||
nsCSPContext::BlockedContentSource aSource, nsACString& aString) {
|
||
switch (aSource) {
|
||
case nsCSPContext::BlockedContentSource::eUnknown:
|
||
aString.Truncate();
|
||
break;
|
||
|
||
case nsCSPContext::BlockedContentSource::eInline:
|
||
aString.AssignLiteral("inline");
|
||
break;
|
||
|
||
case nsCSPContext::BlockedContentSource::eEval:
|
||
aString.AssignLiteral("eval");
|
||
break;
|
||
|
||
case nsCSPContext::BlockedContentSource::eSelf:
|
||
aString.AssignLiteral("self");
|
||
break;
|
||
|
||
case nsCSPContext::BlockedContentSource::eWasmEval:
|
||
aString.AssignLiteral("wasm-eval");
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* ===== nsIContentSecurityPolicy impl ====== */
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::ShouldLoad(nsContentPolicyType aContentType,
|
||
nsICSPEventListener* aCSPEventListener,
|
||
nsILoadInfo* aLoadInfo, nsIURI* aContentLocation,
|
||
nsIURI* aOriginalURIIfRedirect,
|
||
bool aSendViolationReports, int16_t* outDecision) {
|
||
if (CSPCONTEXTLOGENABLED()) {
|
||
CSPCONTEXTLOG(("nsCSPContext::ShouldLoad, aContentLocation: %s",
|
||
aContentLocation->GetSpecOrDefault().get()));
|
||
CSPCONTEXTLOG((">>>> aContentType: %s",
|
||
NS_CP_ContentTypeName(aContentType)));
|
||
}
|
||
|
||
// This ShouldLoad function is called from nsCSPService::ShouldLoad,
|
||
// which already checked a number of things, including:
|
||
// * aContentLocation is not null; we can consume this without further checks
|
||
// * scheme is not a allowlisted scheme (about: chrome:, etc).
|
||
// * CSP is enabled
|
||
// * Content Type is not allowlisted (CSP Reports, TYPE_DOCUMENT, etc).
|
||
// * Fast Path for Apps
|
||
|
||
// Default decision, CSP can revise it if there's a policy to enforce
|
||
*outDecision = nsIContentPolicy::ACCEPT;
|
||
|
||
// If the content type doesn't map to a CSP directive, there's nothing for
|
||
// CSP to do.
|
||
CSPDirective dir = CSP_ContentTypeToDirective(aContentType);
|
||
if (dir == nsIContentSecurityPolicy::NO_DIRECTIVE) {
|
||
return NS_OK;
|
||
}
|
||
|
||
bool permitted = permitsInternal(
|
||
dir,
|
||
nullptr, // aTriggeringElement
|
||
aCSPEventListener, aLoadInfo, aContentLocation, aOriginalURIIfRedirect,
|
||
false, // allow fallback to default-src
|
||
aSendViolationReports,
|
||
true); // send blocked URI in violation reports
|
||
|
||
*outDecision =
|
||
permitted ? nsIContentPolicy::ACCEPT : nsIContentPolicy::REJECT_SERVER;
|
||
|
||
if (CSPCONTEXTLOGENABLED()) {
|
||
CSPCONTEXTLOG(
|
||
("nsCSPContext::ShouldLoad, decision: %s, "
|
||
"aContentLocation: %s",
|
||
*outDecision > 0 ? "load" : "deny",
|
||
aContentLocation->GetSpecOrDefault().get()));
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
bool nsCSPContext::permitsInternal(
|
||
CSPDirective aDir, Element* aTriggeringElement,
|
||
nsICSPEventListener* aCSPEventListener, nsILoadInfo* aLoadInfo,
|
||
nsIURI* aContentLocation, nsIURI* aOriginalURIIfRedirect, bool aSpecific,
|
||
bool aSendViolationReports, bool aSendContentLocationInViolationReports) {
|
||
EnsureIPCPoliciesRead();
|
||
bool permits = true;
|
||
|
||
nsAutoString violatedDirective;
|
||
for (uint32_t p = 0; p < mPolicies.Length(); p++) {
|
||
if (!mPolicies[p]->permits(aDir, aLoadInfo, aContentLocation,
|
||
!!aOriginalURIIfRedirect, aSpecific,
|
||
violatedDirective)) {
|
||
// If the policy is violated and not report-only, reject the load and
|
||
// report to the console
|
||
if (!mPolicies[p]->getReportOnlyFlag()) {
|
||
CSPCONTEXTLOG(("nsCSPContext::permitsInternal, false"));
|
||
permits = false;
|
||
}
|
||
|
||
// In CSP 3.0 the effective directive doesn't become the actually used
|
||
// directive in case of a fallback from e.g. script-src-elem to
|
||
// script-src or default-src.
|
||
nsAutoString effectiveDirective;
|
||
effectiveDirective.AssignASCII(CSP_CSPDirectiveToString(aDir));
|
||
|
||
// Callers should set |aSendViolationReports| to false if this is a
|
||
// preload - the decision may be wrong due to the inability to get the
|
||
// nonce, and will incorrectly fail the unit tests.
|
||
if (aSendViolationReports) {
|
||
uint32_t lineNumber = 0;
|
||
uint32_t columnNumber = 0;
|
||
nsAutoString spec;
|
||
JSContext* cx = nsContentUtils::GetCurrentJSContext();
|
||
if (cx) {
|
||
nsJSUtils::GetCallingLocation(cx, spec, &lineNumber, &columnNumber);
|
||
// If GetCallingLocation fails linenumber & columnNumber are set to 0
|
||
// anyway so we can skip checking if that is the case.
|
||
}
|
||
AsyncReportViolation(
|
||
aTriggeringElement, aCSPEventListener,
|
||
(aSendContentLocationInViolationReports ? aContentLocation
|
||
: nullptr),
|
||
BlockedContentSource::eUnknown, /* a BlockedContentSource */
|
||
aOriginalURIIfRedirect, /* in case of redirect originalURI is not
|
||
null */
|
||
violatedDirective, effectiveDirective, p, /* policy index */
|
||
u""_ns, /* no observer subject */
|
||
spec, /* source file */
|
||
false, // aReportSample (no sample)
|
||
u""_ns, /* no script sample */
|
||
lineNumber, /* line number */
|
||
columnNumber); /* column number */
|
||
}
|
||
}
|
||
}
|
||
|
||
return permits;
|
||
}
|
||
|
||
/* ===== nsISupports implementation ========== */
|
||
|
||
NS_IMPL_CLASSINFO(nsCSPContext, nullptr, 0, NS_CSPCONTEXT_CID)
|
||
|
||
NS_IMPL_ISUPPORTS_CI(nsCSPContext, nsIContentSecurityPolicy, nsISerializable)
|
||
|
||
nsCSPContext::nsCSPContext()
|
||
: mInnerWindowID(0),
|
||
mSkipAllowInlineStyleCheck(false),
|
||
mLoadingContext(nullptr),
|
||
mLoadingPrincipal(nullptr),
|
||
mQueueUpMessages(true) {
|
||
CSPCONTEXTLOG(("nsCSPContext::nsCSPContext"));
|
||
}
|
||
|
||
nsCSPContext::~nsCSPContext() {
|
||
CSPCONTEXTLOG(("nsCSPContext::~nsCSPContext"));
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
delete mPolicies[i];
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
bool nsCSPContext::Equals(nsIContentSecurityPolicy* aCSP,
|
||
nsIContentSecurityPolicy* aOtherCSP) {
|
||
if (aCSP == aOtherCSP) {
|
||
// fast path for pointer equality
|
||
return true;
|
||
}
|
||
|
||
uint32_t policyCount = 0;
|
||
if (aCSP) {
|
||
aCSP->GetPolicyCount(&policyCount);
|
||
}
|
||
|
||
uint32_t otherPolicyCount = 0;
|
||
if (aOtherCSP) {
|
||
aOtherCSP->GetPolicyCount(&otherPolicyCount);
|
||
}
|
||
|
||
if (policyCount != otherPolicyCount) {
|
||
return false;
|
||
}
|
||
|
||
nsAutoString policyStr, otherPolicyStr;
|
||
for (uint32_t i = 0; i < policyCount; ++i) {
|
||
aCSP->GetPolicyString(i, policyStr);
|
||
aOtherCSP->GetPolicyString(i, otherPolicyStr);
|
||
if (!policyStr.Equals(otherPolicyStr)) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
nsresult nsCSPContext::InitFromOther(nsCSPContext* aOtherContext) {
|
||
NS_ENSURE_ARG(aOtherContext);
|
||
|
||
nsresult rv = NS_OK;
|
||
nsCOMPtr<Document> doc = do_QueryReferent(aOtherContext->mLoadingContext);
|
||
if (doc) {
|
||
rv = SetRequestContextWithDocument(doc);
|
||
} else {
|
||
rv = SetRequestContextWithPrincipal(
|
||
aOtherContext->mLoadingPrincipal, aOtherContext->mSelfURI,
|
||
aOtherContext->mReferrer, aOtherContext->mInnerWindowID);
|
||
}
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
mSkipAllowInlineStyleCheck = aOtherContext->mSkipAllowInlineStyleCheck;
|
||
|
||
// This policy was already parsed somewhere else, don't emit parsing errors.
|
||
mSuppressParserLogMessages = true;
|
||
for (auto policy : aOtherContext->mPolicies) {
|
||
nsAutoString policyStr;
|
||
policy->toString(policyStr);
|
||
AppendPolicy(policyStr, policy->getReportOnlyFlag(),
|
||
policy->getDeliveredViaMetaTagFlag());
|
||
}
|
||
|
||
mSuppressParserLogMessages = aOtherContext->mSuppressParserLogMessages;
|
||
|
||
mIPCPolicies = aOtherContext->mIPCPolicies.Clone();
|
||
return NS_OK;
|
||
}
|
||
|
||
void nsCSPContext::EnsureIPCPoliciesRead() {
|
||
// Most likely the parser errors already happened before serializing
|
||
// the policy for IPC.
|
||
bool previous = mSuppressParserLogMessages;
|
||
mSuppressParserLogMessages = true;
|
||
|
||
if (mIPCPolicies.Length() > 0) {
|
||
nsresult rv;
|
||
for (auto& policy : mIPCPolicies) {
|
||
rv = AppendPolicy(policy.policy(), policy.reportOnlyFlag(),
|
||
policy.deliveredViaMetaTagFlag());
|
||
Unused << NS_WARN_IF(NS_FAILED(rv));
|
||
}
|
||
mIPCPolicies.Clear();
|
||
}
|
||
|
||
mSuppressParserLogMessages = previous;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetPolicyString(uint32_t aIndex, nsAString& outStr) {
|
||
outStr.Truncate();
|
||
EnsureIPCPoliciesRead();
|
||
if (aIndex >= mPolicies.Length()) {
|
||
return NS_ERROR_ILLEGAL_VALUE;
|
||
}
|
||
mPolicies[aIndex]->toString(outStr);
|
||
return NS_OK;
|
||
}
|
||
|
||
const nsCSPPolicy* nsCSPContext::GetPolicy(uint32_t aIndex) {
|
||
EnsureIPCPoliciesRead();
|
||
if (aIndex >= mPolicies.Length()) {
|
||
return nullptr;
|
||
}
|
||
return mPolicies[aIndex];
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetPolicyCount(uint32_t* outPolicyCount) {
|
||
EnsureIPCPoliciesRead();
|
||
*outPolicyCount = mPolicies.Length();
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetUpgradeInsecureRequests(bool* outUpgradeRequest) {
|
||
EnsureIPCPoliciesRead();
|
||
*outUpgradeRequest = false;
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
if (mPolicies[i]->hasDirective(
|
||
nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE) &&
|
||
!mPolicies[i]->getReportOnlyFlag()) {
|
||
*outUpgradeRequest = true;
|
||
return NS_OK;
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetBlockAllMixedContent(bool* outBlockAllMixedContent) {
|
||
EnsureIPCPoliciesRead();
|
||
*outBlockAllMixedContent = false;
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
if (!mPolicies[i]->getReportOnlyFlag() &&
|
||
mPolicies[i]->hasDirective(
|
||
nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT)) {
|
||
*outBlockAllMixedContent = true;
|
||
return NS_OK;
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetEnforcesFrameAncestors(bool* outEnforcesFrameAncestors) {
|
||
EnsureIPCPoliciesRead();
|
||
*outEnforcesFrameAncestors = false;
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
if (!mPolicies[i]->getReportOnlyFlag() &&
|
||
mPolicies[i]->hasDirective(
|
||
nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE)) {
|
||
*outEnforcesFrameAncestors = true;
|
||
return NS_OK;
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::AppendPolicy(const nsAString& aPolicyString, bool aReportOnly,
|
||
bool aDeliveredViaMetaTag) {
|
||
CSPCONTEXTLOG(("nsCSPContext::AppendPolicy: %s",
|
||
NS_ConvertUTF16toUTF8(aPolicyString).get()));
|
||
|
||
// Use mSelfURI from setRequestContextWith{Document,Principal} (bug 991474)
|
||
MOZ_ASSERT(
|
||
mLoadingPrincipal,
|
||
"did you forget to call setRequestContextWith{Document,Principal}?");
|
||
MOZ_ASSERT(
|
||
mSelfURI,
|
||
"did you forget to call setRequestContextWith{Document,Principal}?");
|
||
NS_ENSURE_TRUE(mLoadingPrincipal, NS_ERROR_UNEXPECTED);
|
||
NS_ENSURE_TRUE(mSelfURI, NS_ERROR_UNEXPECTED);
|
||
|
||
if (CSPORIGINLOGENABLED()) {
|
||
nsAutoCString selfURISpec;
|
||
mSelfURI->GetSpec(selfURISpec);
|
||
CSPORIGINLOG(("CSP - AppendPolicy"));
|
||
CSPORIGINLOG((" * selfURI: %s", selfURISpec.get()));
|
||
CSPORIGINLOG((" * reportOnly: %s", aReportOnly ? "yes" : "no"));
|
||
CSPORIGINLOG(
|
||
(" * deliveredViaMetaTag: %s", aDeliveredViaMetaTag ? "yes" : "no"));
|
||
CSPORIGINLOG(
|
||
(" * policy: %s\n", NS_ConvertUTF16toUTF8(aPolicyString).get()));
|
||
}
|
||
|
||
nsCSPPolicy* policy = nsCSPParser::parseContentSecurityPolicy(
|
||
aPolicyString, mSelfURI, aReportOnly, this, aDeliveredViaMetaTag,
|
||
mSuppressParserLogMessages);
|
||
if (policy) {
|
||
if (policy->hasDirective(
|
||
nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE)) {
|
||
nsAutoCString selfURIspec, referrer;
|
||
if (mSelfURI) {
|
||
mSelfURI->GetAsciiSpec(selfURIspec);
|
||
}
|
||
CopyUTF16toUTF8(mReferrer, referrer);
|
||
CSPCONTEXTLOG(
|
||
("nsCSPContext::AppendPolicy added UPGRADE_IF_INSECURE_DIRECTIVE "
|
||
"self-uri=%s referrer=%s",
|
||
selfURIspec.get(), referrer.get()));
|
||
}
|
||
|
||
mPolicies.AppendElement(policy);
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetAllowsEval(bool* outShouldReportViolation,
|
||
bool* outAllowsEval) {
|
||
EnsureIPCPoliciesRead();
|
||
*outShouldReportViolation = false;
|
||
*outAllowsEval = true;
|
||
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
if (!mPolicies[i]->allows(SCRIPT_SRC_DIRECTIVE, CSP_UNSAFE_EVAL, u""_ns)) {
|
||
// policy is violated: must report the violation and allow the inline
|
||
// script if the policy is report-only.
|
||
*outShouldReportViolation = true;
|
||
if (!mPolicies[i]->getReportOnlyFlag()) {
|
||
*outAllowsEval = false;
|
||
}
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetAllowsWasmEval(bool* outShouldReportViolation,
|
||
bool* outAllowsWasmEval) {
|
||
EnsureIPCPoliciesRead();
|
||
*outShouldReportViolation = false;
|
||
*outAllowsWasmEval = true;
|
||
|
||
if (!StaticPrefs::security_csp_wasm_unsafe_eval_enabled()) {
|
||
// Allow and don't report when wasm-unsafe-eval isn't supported.
|
||
return NS_OK;
|
||
}
|
||
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
// Either 'unsafe-eval' or 'wasm-unsafe-eval' can allow this
|
||
if (!mPolicies[i]->allows(SCRIPT_SRC_DIRECTIVE, CSP_WASM_UNSAFE_EVAL,
|
||
u""_ns) &&
|
||
!mPolicies[i]->allows(SCRIPT_SRC_DIRECTIVE, CSP_UNSAFE_EVAL, u""_ns)) {
|
||
// policy is violated: must report the violation and allow the inline
|
||
// script if the policy is report-only.
|
||
*outShouldReportViolation = true;
|
||
if (!mPolicies[i]->getReportOnlyFlag()) {
|
||
*outAllowsWasmEval = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
// Helper function to report inline violations
|
||
void nsCSPContext::reportInlineViolation(
|
||
CSPDirective aDirective, Element* aTriggeringElement,
|
||
nsICSPEventListener* aCSPEventListener, const nsAString& aNonce,
|
||
bool aReportSample, const nsAString& aSample,
|
||
const nsAString& aViolatedDirective, const nsAString& aEffectiveDirective,
|
||
uint32_t aViolatedPolicyIndex, // TODO, use report only flag for that
|
||
uint32_t aLineNumber, uint32_t aColumnNumber) {
|
||
nsString observerSubject;
|
||
// if the nonce is non empty, then we report the nonce error, otherwise
|
||
// let's report the hash error; no need to report the unsafe-inline error
|
||
// anymore.
|
||
if (!aNonce.IsEmpty()) {
|
||
observerSubject = (aDirective == SCRIPT_SRC_ELEM_DIRECTIVE ||
|
||
aDirective == SCRIPT_SRC_ATTR_DIRECTIVE)
|
||
? NS_LITERAL_STRING_FROM_CSTRING(
|
||
SCRIPT_NONCE_VIOLATION_OBSERVER_TOPIC)
|
||
: NS_LITERAL_STRING_FROM_CSTRING(
|
||
STYLE_NONCE_VIOLATION_OBSERVER_TOPIC);
|
||
} else {
|
||
observerSubject = (aDirective == SCRIPT_SRC_ELEM_DIRECTIVE ||
|
||
aDirective == SCRIPT_SRC_ATTR_DIRECTIVE)
|
||
? NS_LITERAL_STRING_FROM_CSTRING(
|
||
SCRIPT_HASH_VIOLATION_OBSERVER_TOPIC)
|
||
: NS_LITERAL_STRING_FROM_CSTRING(
|
||
STYLE_HASH_VIOLATION_OBSERVER_TOPIC);
|
||
}
|
||
|
||
nsAutoString sourceFile;
|
||
uint32_t lineNumber;
|
||
uint32_t columnNumber;
|
||
|
||
JSContext* cx = nsContentUtils::GetCurrentJSContext();
|
||
if (!cx || !nsJSUtils::GetCallingLocation(cx, sourceFile, &lineNumber,
|
||
&columnNumber)) {
|
||
// use selfURI as the sourceFile
|
||
if (mSelfURI) {
|
||
nsAutoCString cSourceFile;
|
||
mSelfURI->GetSpec(cSourceFile);
|
||
sourceFile.Assign(NS_ConvertUTF8toUTF16(cSourceFile));
|
||
}
|
||
lineNumber = aLineNumber;
|
||
columnNumber = aColumnNumber;
|
||
}
|
||
|
||
AsyncReportViolation(aTriggeringElement, aCSPEventListener,
|
||
nullptr, // aBlockedURI
|
||
BlockedContentSource::eInline, // aBlockedSource
|
||
mSelfURI, // aOriginalURI
|
||
aViolatedDirective, // aViolatedDirective
|
||
aEffectiveDirective, // aEffectiveDirective
|
||
aViolatedPolicyIndex, // aViolatedPolicyIndex
|
||
observerSubject, // aObserverSubject
|
||
sourceFile, // aSourceFile
|
||
aReportSample, // aReportSample
|
||
aSample, // aScriptSample
|
||
lineNumber, // aLineNum
|
||
columnNumber); // aColumnNum
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetAllowsInline(CSPDirective aDirective, bool aHasUnsafeHash,
|
||
const nsAString& aNonce, bool aParserCreated,
|
||
Element* aTriggeringElement,
|
||
nsICSPEventListener* aCSPEventListener,
|
||
const nsAString& aContentOfPseudoScript,
|
||
uint32_t aLineNumber, uint32_t aColumnNumber,
|
||
bool* outAllowsInline) {
|
||
*outAllowsInline = true;
|
||
|
||
if (aDirective != SCRIPT_SRC_ELEM_DIRECTIVE &&
|
||
aDirective != SCRIPT_SRC_ATTR_DIRECTIVE &&
|
||
aDirective != STYLE_SRC_ELEM_DIRECTIVE &&
|
||
aDirective != STYLE_SRC_ATTR_DIRECTIVE) {
|
||
MOZ_ASSERT(false,
|
||
"can only allow inline for (script/style)-src-(attr/elem)");
|
||
return NS_OK;
|
||
}
|
||
|
||
EnsureIPCPoliciesRead();
|
||
nsAutoString content(u""_ns);
|
||
|
||
// always iterate all policies, otherwise we might not send out all reports
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
// https://w3c.github.io/webappsec-csp/#match-element-to-source-list
|
||
// Step 1. If §6.7.3.2 Does a source list allow all inline behavior for
|
||
// type? returns "Allows" given list and type, return "Matches".
|
||
if (mPolicies[i]->allowsAllInlineBehavior(aDirective)) {
|
||
continue;
|
||
}
|
||
|
||
// Step 2. If type is "script" or "style", and §6.7.3.1 Is element
|
||
// nonceable? returns "Nonceable" when executed upon element: [...]
|
||
// TODO(Bug 1397308) Implement "is element nonceable?" CSP checks
|
||
if (mPolicies[i]->allows(aDirective, CSP_NONCE, aNonce)) {
|
||
continue;
|
||
}
|
||
|
||
// Check the content length to ensure the content is not allocated more than
|
||
// once. Even though we are in a for loop, it is probable that there is only
|
||
// one policy, so this check may be unnecessary.
|
||
if (content.IsEmpty() && aTriggeringElement) {
|
||
nsCOMPtr<nsIScriptElement> element =
|
||
do_QueryInterface(aTriggeringElement);
|
||
if (element) {
|
||
element->GetScriptText(content);
|
||
}
|
||
}
|
||
if (content.IsEmpty()) {
|
||
content = aContentOfPseudoScript;
|
||
}
|
||
|
||
// Step 3. Let unsafe-hashes flag be false.
|
||
// Step 4. For each expression of list: [...]
|
||
bool unsafeHashesFlag =
|
||
mPolicies[i]->allows(aDirective, CSP_UNSAFE_HASHES, u""_ns);
|
||
|
||
// Step 5. If type is "script" or "style", or unsafe-hashes flag is true:
|
||
//
|
||
// aHasUnsafeHash is true for event handlers (type "script attribute"),
|
||
// style= attributes (type "style attribute") and the javascript: protocol.
|
||
if (!aHasUnsafeHash || unsafeHashesFlag) {
|
||
if (mPolicies[i]->allows(aDirective, CSP_HASH, content)) {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// TODO(Bug 1844290): Figure out how/if strict-dynamic for inline scripts is
|
||
// specified
|
||
bool allowed = false;
|
||
if ((aDirective == SCRIPT_SRC_ELEM_DIRECTIVE ||
|
||
aDirective == SCRIPT_SRC_ATTR_DIRECTIVE) &&
|
||
mPolicies[i]->allows(aDirective, CSP_STRICT_DYNAMIC, u""_ns)) {
|
||
allowed = !aParserCreated;
|
||
}
|
||
|
||
if (!allowed) {
|
||
// policy is violoated: deny the load unless policy is report only and
|
||
// report the violation.
|
||
if (!mPolicies[i]->getReportOnlyFlag()) {
|
||
*outAllowsInline = false;
|
||
}
|
||
nsAutoString violatedDirective;
|
||
bool reportSample = false;
|
||
mPolicies[i]->getDirectiveStringAndReportSampleForContentType(
|
||
aDirective, violatedDirective, &reportSample);
|
||
|
||
// In CSP 3.0 the effective directive doesn't become the actually used
|
||
// directive in case of a fallback from e.g. script-src-elem to
|
||
// script-src or default-src.
|
||
nsAutoString effectiveDirective;
|
||
effectiveDirective.AssignASCII(CSP_CSPDirectiveToString(aDirective));
|
||
|
||
reportInlineViolation(aDirective, aTriggeringElement, aCSPEventListener,
|
||
aNonce, reportSample, content, violatedDirective,
|
||
effectiveDirective, i, aLineNumber, aColumnNumber);
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetAllowsNavigateTo(nsIURI* aURI, bool aIsFormSubmission,
|
||
bool aWasRedirected, bool aEnforceAllowlist,
|
||
bool* outAllowsNavigateTo) {
|
||
/*
|
||
* The matrix below shows the different values of (aWasRedirect,
|
||
* aEnforceAllowlist) for the three different checks we do.
|
||
*
|
||
* Navigation | Start Loading | Initiate Redirect | Document
|
||
* | (nsDocShell) | (nsCSPService) |
|
||
* -----------------------------------------------------------------
|
||
* A -> B (false,false) - (false,true)
|
||
* A -> ... -> B (false,false) (true,false) (true,true)
|
||
*/
|
||
*outAllowsNavigateTo = false;
|
||
|
||
EnsureIPCPoliciesRead();
|
||
// The 'form-action' directive overrules 'navigate-to' for form submissions.
|
||
// So in case this is a form submission and the directive 'form-action' is
|
||
// present then there is nothing for us to do here, see: 6.3.3.1.2
|
||
// https://www.w3.org/TR/CSP3/#navigate-to-pre-navigate
|
||
if (aIsFormSubmission) {
|
||
for (unsigned long i = 0; i < mPolicies.Length(); i++) {
|
||
if (mPolicies[i]->hasDirective(
|
||
nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE)) {
|
||
*outAllowsNavigateTo = true;
|
||
return NS_OK;
|
||
}
|
||
}
|
||
}
|
||
|
||
bool atLeastOneBlock = false;
|
||
for (unsigned long i = 0; i < mPolicies.Length(); i++) {
|
||
if (!mPolicies[i]->allowsNavigateTo(aURI, aWasRedirected,
|
||
aEnforceAllowlist)) {
|
||
if (!mPolicies[i]->getReportOnlyFlag()) {
|
||
atLeastOneBlock = true;
|
||
}
|
||
|
||
// If the load encountered a server side redirect, the spec suggests to
|
||
// remove the path component from the URI, see:
|
||
// https://www.w3.org/TR/CSP3/#source-list-paths-and-redirects
|
||
nsCOMPtr<nsIURI> blockedURIForReporting = aURI;
|
||
if (aWasRedirected) {
|
||
nsAutoCString prePathStr;
|
||
nsCOMPtr<nsIURI> prePathURI;
|
||
nsresult rv = aURI->GetPrePath(prePathStr);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
rv = NS_NewURI(getter_AddRefs(blockedURIForReporting), prePathStr);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
|
||
// Lines numbers and source file for the violation report
|
||
uint32_t lineNumber = 0;
|
||
uint32_t columnNumber = 0;
|
||
nsAutoCString spec;
|
||
JSContext* cx = nsContentUtils::GetCurrentJSContext();
|
||
if (cx) {
|
||
nsJSUtils::GetCallingLocation(cx, spec, &lineNumber, &columnNumber);
|
||
// If GetCallingLocation fails linenumber & columnNumber are set to 0
|
||
// anyway so we can skip checking if that is the case.
|
||
}
|
||
|
||
// Report the violation
|
||
nsresult rv = AsyncReportViolation(
|
||
nullptr, // aTriggeringElement
|
||
nullptr, // aCSPEventListener
|
||
blockedURIForReporting, // aBlockedURI
|
||
nsCSPContext::BlockedContentSource::eSelf, // aBlockedSource
|
||
nullptr, // aOriginalURI
|
||
u"navigate-to"_ns, // aViolatedDirective
|
||
u"navigate-to"_ns, // aEffectiveDirective
|
||
i, // aViolatedPolicyIndex
|
||
u""_ns, // aObserverSubject
|
||
NS_ConvertUTF8toUTF16(spec), // aSourceFile
|
||
false, // aReportSample
|
||
u""_ns, // aScriptSample
|
||
lineNumber, // aLineNum
|
||
columnNumber); // aColumnNum
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
}
|
||
|
||
*outAllowsNavigateTo = !atLeastOneBlock;
|
||
return NS_OK;
|
||
}
|
||
|
||
/**
|
||
* For each policy, log any violation on the Error Console and send a report
|
||
* if a report-uri is present in the policy
|
||
*
|
||
* @param aViolationType
|
||
* one of the VIOLATION_TYPE_* constants, e.g. inline-script or eval
|
||
* @param aSourceFile
|
||
* name of the source file containing the violation (if available)
|
||
* @param aContentSample
|
||
* sample of the violating content (to aid debugging)
|
||
* @param aLineNum
|
||
* source line number of the violation (if available)
|
||
* @param aColumnNum
|
||
* source column number of the violation (if available)
|
||
* @param aNonce
|
||
* (optional) If this is a nonce violation, include the nonce so we can
|
||
* recheck to determine which policies were violated and send the
|
||
* appropriate reports.
|
||
* @param aContent
|
||
* (optional) If this is a hash violation, include contents of the inline
|
||
* resource in the question so we can recheck the hash in order to
|
||
* determine which policies were violated and send the appropriate
|
||
* reports.
|
||
*/
|
||
NS_IMETHODIMP
|
||
nsCSPContext::LogViolationDetails(
|
||
uint16_t aViolationType, Element* aTriggeringElement,
|
||
nsICSPEventListener* aCSPEventListener, const nsAString& aSourceFile,
|
||
const nsAString& aScriptSample, int32_t aLineNum, int32_t aColumnNum,
|
||
const nsAString& aNonce, const nsAString& aContent) {
|
||
EnsureIPCPoliciesRead();
|
||
|
||
BlockedContentSource blockedContentSource;
|
||
enum CSPKeyword keyword;
|
||
nsAutoString observerSubject;
|
||
if (aViolationType == nsIContentSecurityPolicy::VIOLATION_TYPE_EVAL) {
|
||
blockedContentSource = BlockedContentSource::eEval;
|
||
keyword = CSP_UNSAFE_EVAL;
|
||
observerSubject.AssignLiteral(EVAL_VIOLATION_OBSERVER_TOPIC);
|
||
} else {
|
||
NS_ASSERTION(
|
||
aViolationType == nsIContentSecurityPolicy::VIOLATION_TYPE_WASM_EVAL,
|
||
"unexpected aViolationType");
|
||
blockedContentSource = BlockedContentSource::eWasmEval;
|
||
keyword = CSP_WASM_UNSAFE_EVAL;
|
||
observerSubject.AssignLiteral(WASM_EVAL_VIOLATION_OBSERVER_TOPIC);
|
||
}
|
||
|
||
for (uint32_t p = 0; p < mPolicies.Length(); p++) {
|
||
NS_ASSERTION(mPolicies[p], "null pointer in nsTArray<nsCSPPolicy>");
|
||
|
||
if (mPolicies[p]->allows(SCRIPT_SRC_DIRECTIVE, keyword, u""_ns)) {
|
||
continue;
|
||
}
|
||
|
||
nsAutoString violatedDirective;
|
||
bool reportSample = false;
|
||
mPolicies[p]->getDirectiveStringAndReportSampleForContentType(
|
||
SCRIPT_SRC_DIRECTIVE, violatedDirective, &reportSample);
|
||
|
||
AsyncReportViolation(aTriggeringElement, aCSPEventListener, nullptr,
|
||
blockedContentSource, nullptr, violatedDirective,
|
||
u"script-src"_ns /* aEffectiveDirective */, p,
|
||
observerSubject, aSourceFile, reportSample,
|
||
aScriptSample, aLineNum, aColumnNum);
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
#undef CASE_CHECK_AND_REPORT
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::SetRequestContextWithDocument(Document* aDocument) {
|
||
MOZ_ASSERT(aDocument, "Can't set context without doc");
|
||
NS_ENSURE_ARG(aDocument);
|
||
|
||
mLoadingContext = do_GetWeakReference(aDocument);
|
||
mSelfURI = aDocument->GetDocumentURI();
|
||
mLoadingPrincipal = aDocument->NodePrincipal();
|
||
aDocument->GetReferrer(mReferrer);
|
||
mInnerWindowID = aDocument->InnerWindowID();
|
||
// the innerWindowID is not available for CSPs delivered through the
|
||
// header at the time setReqeustContext is called - let's queue up
|
||
// console messages until it becomes available, see flushConsoleMessages
|
||
mQueueUpMessages = !mInnerWindowID;
|
||
mCallingChannelLoadGroup = aDocument->GetDocumentLoadGroup();
|
||
// set the flag on the document for CSP telemetry
|
||
mEventTarget = GetMainThreadSerialEventTarget();
|
||
|
||
MOZ_ASSERT(mLoadingPrincipal, "need a valid requestPrincipal");
|
||
MOZ_ASSERT(mSelfURI, "need mSelfURI to translate 'self' into actual URI");
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::SetRequestContextWithPrincipal(nsIPrincipal* aRequestPrincipal,
|
||
nsIURI* aSelfURI,
|
||
const nsAString& aReferrer,
|
||
uint64_t aInnerWindowId) {
|
||
NS_ENSURE_ARG(aRequestPrincipal);
|
||
|
||
mLoadingPrincipal = aRequestPrincipal;
|
||
mSelfURI = aSelfURI;
|
||
mReferrer = aReferrer;
|
||
mInnerWindowID = aInnerWindowId;
|
||
// if no document is available, then it also does not make sense to queue
|
||
// console messages sending messages to the browser console instead of the web
|
||
// console in that case.
|
||
mQueueUpMessages = false;
|
||
mCallingChannelLoadGroup = nullptr;
|
||
mEventTarget = nullptr;
|
||
|
||
MOZ_ASSERT(mLoadingPrincipal, "need a valid requestPrincipal");
|
||
MOZ_ASSERT(mSelfURI, "need mSelfURI to translate 'self' into actual URI");
|
||
return NS_OK;
|
||
}
|
||
|
||
nsIPrincipal* nsCSPContext::GetRequestPrincipal() { return mLoadingPrincipal; }
|
||
|
||
nsIURI* nsCSPContext::GetSelfURI() { return mSelfURI; }
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetReferrer(nsAString& outReferrer) {
|
||
outReferrer.Truncate();
|
||
outReferrer.Append(mReferrer);
|
||
return NS_OK;
|
||
}
|
||
|
||
uint64_t nsCSPContext::GetInnerWindowID() { return mInnerWindowID; }
|
||
|
||
bool nsCSPContext::GetSkipAllowInlineStyleCheck() {
|
||
return mSkipAllowInlineStyleCheck;
|
||
}
|
||
|
||
void nsCSPContext::SetSkipAllowInlineStyleCheck(
|
||
bool aSkipAllowInlineStyleCheck) {
|
||
mSkipAllowInlineStyleCheck = aSkipAllowInlineStyleCheck;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::EnsureEventTarget(nsIEventTarget* aEventTarget) {
|
||
NS_ENSURE_ARG(aEventTarget);
|
||
// Don't bother if we did have a valid event target (if the csp object is
|
||
// tied to a document in SetRequestContextWithDocument)
|
||
if (mEventTarget) {
|
||
return NS_OK;
|
||
}
|
||
|
||
mEventTarget = aEventTarget;
|
||
return NS_OK;
|
||
}
|
||
|
||
struct ConsoleMsgQueueElem {
|
||
nsString mMsg;
|
||
nsString mSourceName;
|
||
nsString mSourceLine;
|
||
uint32_t mLineNumber;
|
||
uint32_t mColumnNumber;
|
||
uint32_t mSeverityFlag;
|
||
nsCString mCategory;
|
||
};
|
||
|
||
void nsCSPContext::flushConsoleMessages() {
|
||
bool privateWindow = false;
|
||
|
||
// should flush messages even if doc is not available
|
||
nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
|
||
if (doc) {
|
||
mInnerWindowID = doc->InnerWindowID();
|
||
privateWindow =
|
||
!!doc->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId;
|
||
}
|
||
|
||
mQueueUpMessages = false;
|
||
|
||
for (uint32_t i = 0; i < mConsoleMsgQueue.Length(); i++) {
|
||
ConsoleMsgQueueElem& elem = mConsoleMsgQueue[i];
|
||
CSP_LogMessage(elem.mMsg, elem.mSourceName, elem.mSourceLine,
|
||
elem.mLineNumber, elem.mColumnNumber, elem.mSeverityFlag,
|
||
elem.mCategory, mInnerWindowID, privateWindow);
|
||
}
|
||
mConsoleMsgQueue.Clear();
|
||
}
|
||
|
||
void nsCSPContext::logToConsole(const char* aName,
|
||
const nsTArray<nsString>& aParams,
|
||
const nsAString& aSourceName,
|
||
const nsAString& aSourceLine,
|
||
uint32_t aLineNumber, uint32_t aColumnNumber,
|
||
uint32_t aSeverityFlag) {
|
||
// we are passing aName as the category so we can link to the
|
||
// appropriate MDN docs depending on the specific error.
|
||
nsDependentCString category(aName);
|
||
|
||
// Fallback
|
||
nsAutoString sourceName(aSourceName);
|
||
if (sourceName.IsEmpty() && mSelfURI) {
|
||
nsAutoCString spec;
|
||
mSelfURI->GetSpec(spec);
|
||
CopyUTF8toUTF16(spec, sourceName);
|
||
}
|
||
|
||
// let's check if we have to queue up console messages
|
||
if (mQueueUpMessages) {
|
||
nsAutoString msg;
|
||
CSP_GetLocalizedStr(aName, aParams, msg);
|
||
ConsoleMsgQueueElem& elem = *mConsoleMsgQueue.AppendElement();
|
||
elem.mMsg = msg;
|
||
elem.mSourceName = PromiseFlatString(sourceName);
|
||
elem.mSourceLine = PromiseFlatString(aSourceLine);
|
||
elem.mLineNumber = aLineNumber;
|
||
elem.mColumnNumber = aColumnNumber;
|
||
elem.mSeverityFlag = aSeverityFlag;
|
||
elem.mCategory = category;
|
||
return;
|
||
}
|
||
|
||
bool privateWindow = false;
|
||
nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
|
||
if (doc) {
|
||
privateWindow =
|
||
!!doc->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId;
|
||
}
|
||
|
||
CSP_LogLocalizedStr(aName, aParams, sourceName, aSourceLine, aLineNumber,
|
||
aColumnNumber, aSeverityFlag, category, mInnerWindowID,
|
||
privateWindow);
|
||
}
|
||
|
||
/**
|
||
* Strip URI for reporting according to:
|
||
* https://w3c.github.io/webappsec-csp/#security-violation-reports
|
||
*
|
||
* @param aSelfURI
|
||
* The URI of the CSP policy. Used for cross-origin checks.
|
||
* @param aURI
|
||
* The URI of the blocked resource. In case of a redirect, this it the
|
||
* initial URI the request started out with, not the redirected URI.
|
||
* @param aEffectiveDirective
|
||
* The effective directive that triggered this report
|
||
* @return The ASCII serialization of the uri to be reported ignoring
|
||
* the ref part of the URI.
|
||
*/
|
||
void StripURIForReporting(nsIURI* aSelfURI, nsIURI* aURI,
|
||
const nsAString& aEffectiveDirective,
|
||
nsACString& outStrippedURI) {
|
||
// If the origin of aURI is a globally unique identifier (for example,
|
||
// aURI has a scheme of data, blob, or filesystem), then
|
||
// return the ASCII serialization of uri’s scheme.
|
||
bool isHttpOrWs = (aURI->SchemeIs("http") || aURI->SchemeIs("https") ||
|
||
aURI->SchemeIs("ws") || aURI->SchemeIs("wss"));
|
||
|
||
if (!isHttpOrWs) {
|
||
// not strictly spec compliant, but what we really care about is
|
||
// http/https. If it's not http/https, then treat aURI
|
||
// as if it's a globally unique identifier and just return the scheme.
|
||
aURI->GetScheme(outStrippedURI);
|
||
return;
|
||
}
|
||
|
||
// For cross-origin URIs in frame-src also strip the path.
|
||
// This prevents detailed tracking of pages loaded into an iframe
|
||
// by the embedding page using a report-only policy.
|
||
if (aEffectiveDirective.EqualsLiteral("frame-src") ||
|
||
aEffectiveDirective.EqualsLiteral("object-src")) {
|
||
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
|
||
if (NS_FAILED(ssm->CheckSameOriginURI(aSelfURI, aURI, false, false))) {
|
||
aURI->GetPrePath(outStrippedURI);
|
||
return;
|
||
}
|
||
}
|
||
|
||
// Return aURI, with any fragment component removed.
|
||
aURI->GetSpecIgnoringRef(outStrippedURI);
|
||
}
|
||
|
||
nsresult nsCSPContext::GatherSecurityPolicyViolationEventData(
|
||
nsIURI* aBlockedURI, const nsACString& aBlockedString, nsIURI* aOriginalURI,
|
||
const nsAString& aEffectiveDirective, uint32_t aViolatedPolicyIndex,
|
||
const nsAString& aSourceFile, const nsAString& aScriptSample,
|
||
uint32_t aLineNum, uint32_t aColumnNum,
|
||
mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit) {
|
||
EnsureIPCPoliciesRead();
|
||
NS_ENSURE_ARG_MAX(aViolatedPolicyIndex, mPolicies.Length() - 1);
|
||
|
||
MOZ_ASSERT(ValidateDirectiveName(aEffectiveDirective),
|
||
"Invalid directive name");
|
||
|
||
nsresult rv;
|
||
|
||
// document-uri
|
||
nsAutoCString reportDocumentURI;
|
||
StripURIForReporting(mSelfURI, mSelfURI, aEffectiveDirective,
|
||
reportDocumentURI);
|
||
CopyUTF8toUTF16(reportDocumentURI, aViolationEventInit.mDocumentURI);
|
||
|
||
// referrer
|
||
aViolationEventInit.mReferrer = mReferrer;
|
||
|
||
// blocked-uri
|
||
if (aBlockedURI) {
|
||
nsAutoCString reportBlockedURI;
|
||
StripURIForReporting(mSelfURI, aOriginalURI ? aOriginalURI : aBlockedURI,
|
||
aEffectiveDirective, reportBlockedURI);
|
||
CopyUTF8toUTF16(reportBlockedURI, aViolationEventInit.mBlockedURI);
|
||
} else {
|
||
CopyUTF8toUTF16(aBlockedString, aViolationEventInit.mBlockedURI);
|
||
}
|
||
|
||
// effective-directive
|
||
// The name of the policy directive that was violated.
|
||
aViolationEventInit.mEffectiveDirective = aEffectiveDirective;
|
||
|
||
// violated-directive
|
||
// In CSP2, the policy directive that was violated, as it appears in the
|
||
// policy. In CSP3, the same as effective-directive.
|
||
aViolationEventInit.mViolatedDirective = aEffectiveDirective;
|
||
|
||
// original-policy
|
||
nsAutoString originalPolicy;
|
||
rv = this->GetPolicyString(aViolatedPolicyIndex, originalPolicy);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
aViolationEventInit.mOriginalPolicy = originalPolicy;
|
||
|
||
// source-file
|
||
if (!aSourceFile.IsEmpty()) {
|
||
// if aSourceFile is a URI, we have to make sure to strip fragments
|
||
nsCOMPtr<nsIURI> sourceURI;
|
||
NS_NewURI(getter_AddRefs(sourceURI), aSourceFile);
|
||
if (sourceURI) {
|
||
nsAutoCString spec;
|
||
StripURIForReporting(mSelfURI, sourceURI, aEffectiveDirective, spec);
|
||
CopyUTF8toUTF16(spec, aViolationEventInit.mSourceFile);
|
||
} else {
|
||
aViolationEventInit.mSourceFile = aSourceFile;
|
||
}
|
||
}
|
||
|
||
// sample (already truncated)
|
||
aViolationEventInit.mSample = aScriptSample;
|
||
|
||
// disposition
|
||
aViolationEventInit.mDisposition =
|
||
mPolicies[aViolatedPolicyIndex]->getReportOnlyFlag()
|
||
? mozilla::dom::SecurityPolicyViolationEventDisposition::Report
|
||
: mozilla::dom::SecurityPolicyViolationEventDisposition::Enforce;
|
||
|
||
// status-code
|
||
uint16_t statusCode = 0;
|
||
{
|
||
nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
|
||
if (doc) {
|
||
nsCOMPtr<nsIHttpChannel> channel = do_QueryInterface(doc->GetChannel());
|
||
if (channel) {
|
||
uint32_t responseStatus = 0;
|
||
nsresult rv = channel->GetResponseStatus(&responseStatus);
|
||
if (NS_SUCCEEDED(rv) && (responseStatus <= UINT16_MAX)) {
|
||
statusCode = static_cast<uint16_t>(responseStatus);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
aViolationEventInit.mStatusCode = statusCode;
|
||
|
||
// line-number
|
||
aViolationEventInit.mLineNumber = aLineNum;
|
||
|
||
// column-number
|
||
aViolationEventInit.mColumnNumber = aColumnNum;
|
||
|
||
aViolationEventInit.mBubbles = true;
|
||
aViolationEventInit.mComposed = true;
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
bool nsCSPContext::ShouldThrottleReport(
|
||
const mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit) {
|
||
// Fetch rate limiting preferences
|
||
const uint32_t kLimitCount =
|
||
StaticPrefs::security_csp_reporting_limit_count();
|
||
const uint32_t kTimeSpanSeconds =
|
||
StaticPrefs::security_csp_reporting_limit_timespan();
|
||
|
||
// Disable throttling if either of the preferences is set to 0.
|
||
if (kLimitCount == 0 || kTimeSpanSeconds == 0) {
|
||
return false;
|
||
}
|
||
|
||
TimeDuration throttleSpan = TimeDuration::FromSeconds(kTimeSpanSeconds);
|
||
if (mSendReportLimitSpanStart.IsNull() ||
|
||
((TimeStamp::Now() - mSendReportLimitSpanStart) > throttleSpan)) {
|
||
// Initial call or timespan exceeded, reset counter and timespan.
|
||
mSendReportLimitSpanStart = TimeStamp::Now();
|
||
mSendReportLimitCount = 1;
|
||
// Also make sure we warn about omitted messages. (XXX or only do this once
|
||
// per context?)
|
||
mWarnedAboutTooManyReports = false;
|
||
return false;
|
||
}
|
||
|
||
if (mSendReportLimitCount < kLimitCount) {
|
||
mSendReportLimitCount++;
|
||
return false;
|
||
}
|
||
|
||
// Rate limit reached
|
||
if (!mWarnedAboutTooManyReports) {
|
||
logToConsole("tooManyReports", {}, aViolationEventInit.mSourceFile,
|
||
aViolationEventInit.mSample, aViolationEventInit.mLineNumber,
|
||
aViolationEventInit.mColumnNumber, nsIScriptError::errorFlag);
|
||
mWarnedAboutTooManyReports = true;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
nsresult nsCSPContext::SendReports(
|
||
const mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit,
|
||
uint32_t aViolatedPolicyIndex) {
|
||
EnsureIPCPoliciesRead();
|
||
NS_ENSURE_ARG_MAX(aViolatedPolicyIndex, mPolicies.Length() - 1);
|
||
|
||
nsTArray<nsString> reportURIs;
|
||
mPolicies[aViolatedPolicyIndex]->getReportURIs(reportURIs);
|
||
// There is nowhere to send reports to.
|
||
if (reportURIs.IsEmpty()) {
|
||
return NS_OK;
|
||
}
|
||
|
||
if (ShouldThrottleReport(aViolationEventInit)) {
|
||
return NS_OK;
|
||
}
|
||
|
||
dom::CSPReport report;
|
||
|
||
// blocked-uri
|
||
report.mCsp_report.mBlocked_uri = aViolationEventInit.mBlockedURI;
|
||
|
||
// document-uri
|
||
report.mCsp_report.mDocument_uri = aViolationEventInit.mDocumentURI;
|
||
|
||
// original-policy
|
||
report.mCsp_report.mOriginal_policy = aViolationEventInit.mOriginalPolicy;
|
||
|
||
// referrer
|
||
report.mCsp_report.mReferrer = aViolationEventInit.mReferrer;
|
||
|
||
// effective-directive
|
||
report.mCsp_report.mEffective_directive =
|
||
aViolationEventInit.mEffectiveDirective;
|
||
|
||
// violated-directive
|
||
report.mCsp_report.mViolated_directive =
|
||
aViolationEventInit.mEffectiveDirective;
|
||
|
||
// disposition
|
||
report.mCsp_report.mDisposition = aViolationEventInit.mDisposition;
|
||
|
||
// status-code
|
||
report.mCsp_report.mStatus_code = aViolationEventInit.mStatusCode;
|
||
|
||
// source-file
|
||
if (!aViolationEventInit.mSourceFile.IsEmpty()) {
|
||
report.mCsp_report.mSource_file.Construct();
|
||
report.mCsp_report.mSource_file.Value() = aViolationEventInit.mSourceFile;
|
||
}
|
||
|
||
// script-sample
|
||
if (!aViolationEventInit.mSample.IsEmpty()) {
|
||
report.mCsp_report.mScript_sample.Construct();
|
||
report.mCsp_report.mScript_sample.Value() = aViolationEventInit.mSample;
|
||
}
|
||
|
||
// line-number
|
||
if (aViolationEventInit.mLineNumber != 0) {
|
||
report.mCsp_report.mLine_number.Construct();
|
||
report.mCsp_report.mLine_number.Value() = aViolationEventInit.mLineNumber;
|
||
}
|
||
|
||
if (aViolationEventInit.mColumnNumber != 0) {
|
||
report.mCsp_report.mColumn_number.Construct();
|
||
report.mCsp_report.mColumn_number.Value() =
|
||
aViolationEventInit.mColumnNumber;
|
||
}
|
||
|
||
nsString csp_report;
|
||
if (!report.ToJSON(csp_report)) {
|
||
return NS_ERROR_FAILURE;
|
||
}
|
||
|
||
// ---------- Assembled, now send it to all the report URIs ----------- //
|
||
nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
|
||
nsCOMPtr<nsIURI> reportURI;
|
||
nsCOMPtr<nsIChannel> reportChannel;
|
||
|
||
nsresult rv;
|
||
for (uint32_t r = 0; r < reportURIs.Length(); r++) {
|
||
nsAutoCString reportURICstring = NS_ConvertUTF16toUTF8(reportURIs[r]);
|
||
// try to create a new uri from every report-uri string
|
||
rv = NS_NewURI(getter_AddRefs(reportURI), reportURIs[r]);
|
||
if (NS_FAILED(rv)) {
|
||
AutoTArray<nsString, 1> params = {reportURIs[r]};
|
||
CSPCONTEXTLOG(("Could not create nsIURI for report URI %s",
|
||
reportURICstring.get()));
|
||
logToConsole("triedToSendReport", params, aViolationEventInit.mSourceFile,
|
||
aViolationEventInit.mSample, aViolationEventInit.mLineNumber,
|
||
aViolationEventInit.mColumnNumber,
|
||
nsIScriptError::errorFlag);
|
||
continue; // don't return yet, there may be more URIs
|
||
}
|
||
|
||
// try to create a new channel for every report-uri
|
||
if (doc) {
|
||
rv =
|
||
NS_NewChannel(getter_AddRefs(reportChannel), reportURI, doc,
|
||
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
|
||
nsIContentPolicy::TYPE_CSP_REPORT);
|
||
} else {
|
||
rv = NS_NewChannel(
|
||
getter_AddRefs(reportChannel), reportURI, mLoadingPrincipal,
|
||
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
|
||
nsIContentPolicy::TYPE_CSP_REPORT);
|
||
}
|
||
|
||
if (NS_FAILED(rv)) {
|
||
CSPCONTEXTLOG(("Could not create new channel for report URI %s",
|
||
reportURICstring.get()));
|
||
continue; // don't return yet, there may be more URIs
|
||
}
|
||
|
||
// log a warning to console if scheme is not http or https
|
||
bool isHttpScheme =
|
||
reportURI->SchemeIs("http") || reportURI->SchemeIs("https");
|
||
|
||
if (!isHttpScheme) {
|
||
AutoTArray<nsString, 1> params = {reportURIs[r]};
|
||
logToConsole(
|
||
"reportURInotHttpsOrHttp2", params, aViolationEventInit.mSourceFile,
|
||
aViolationEventInit.mSample, aViolationEventInit.mLineNumber,
|
||
aViolationEventInit.mColumnNumber, nsIScriptError::errorFlag);
|
||
continue;
|
||
}
|
||
|
||
// make sure this is an anonymous request (no cookies) so in case the
|
||
// policy URI is injected, it can't be abused for CSRF.
|
||
nsLoadFlags flags;
|
||
rv = reportChannel->GetLoadFlags(&flags);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
flags |= nsIRequest::LOAD_ANONYMOUS;
|
||
rv = reportChannel->SetLoadFlags(flags);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// we need to set an nsIChannelEventSink on the channel object
|
||
// so we can tell it to not follow redirects when posting the reports
|
||
RefPtr<CSPReportRedirectSink> reportSink = new CSPReportRedirectSink();
|
||
if (doc && doc->GetDocShell()) {
|
||
nsCOMPtr<nsINetworkInterceptController> interceptController =
|
||
do_QueryInterface(doc->GetDocShell());
|
||
reportSink->SetInterceptController(interceptController);
|
||
}
|
||
reportChannel->SetNotificationCallbacks(reportSink);
|
||
|
||
// apply the loadgroup taken by setRequestContextWithDocument. If there's
|
||
// no loadgroup, AsyncOpen will fail on process-split necko (since the
|
||
// channel cannot query the iBrowserChild).
|
||
rv = reportChannel->SetLoadGroup(mCallingChannelLoadGroup);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// wire in the string input stream to send the report
|
||
nsCOMPtr<nsIStringInputStream> sis(
|
||
do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID));
|
||
NS_ASSERTION(sis,
|
||
"nsIStringInputStream is needed but not available to send CSP "
|
||
"violation reports");
|
||
nsAutoCString utf8CSPReport = NS_ConvertUTF16toUTF8(csp_report);
|
||
rv = sis->SetData(utf8CSPReport.get(), utf8CSPReport.Length());
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsCOMPtr<nsIUploadChannel> uploadChannel(do_QueryInterface(reportChannel));
|
||
if (!uploadChannel) {
|
||
// It's possible the URI provided can't be uploaded to, in which case
|
||
// we skip this one. We'll already have warned about a non-HTTP URI
|
||
// earlier.
|
||
continue;
|
||
}
|
||
|
||
rv = uploadChannel->SetUploadStream(sis, "application/csp-report"_ns, -1);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// if this is an HTTP channel, set the request method to post
|
||
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(reportChannel));
|
||
if (httpChannel) {
|
||
rv = httpChannel->SetRequestMethod("POST"_ns);
|
||
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
||
}
|
||
|
||
RefPtr<CSPViolationReportListener> listener =
|
||
new CSPViolationReportListener();
|
||
rv = reportChannel->AsyncOpen(listener);
|
||
|
||
// AsyncOpen should not fail, but could if there's no load group (like if
|
||
// SetRequestContextWith{Document,Principal} is not given a channel). This
|
||
// should fail quietly and not return an error since it's really ok if
|
||
// reports don't go out, but it's good to log the error locally.
|
||
|
||
if (NS_FAILED(rv)) {
|
||
AutoTArray<nsString, 1> params = {reportURIs[r]};
|
||
CSPCONTEXTLOG(("AsyncOpen failed for report URI %s",
|
||
NS_ConvertUTF16toUTF8(params[0]).get()));
|
||
logToConsole("triedToSendReport", params, aViolationEventInit.mSourceFile,
|
||
aViolationEventInit.mSample, aViolationEventInit.mLineNumber,
|
||
aViolationEventInit.mColumnNumber,
|
||
nsIScriptError::errorFlag);
|
||
} else {
|
||
CSPCONTEXTLOG(
|
||
("Sent violation report to URI %s", reportURICstring.get()));
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
nsresult nsCSPContext::FireViolationEvent(
|
||
Element* aTriggeringElement, nsICSPEventListener* aCSPEventListener,
|
||
const mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit) {
|
||
if (aCSPEventListener) {
|
||
nsAutoString json;
|
||
if (aViolationEventInit.ToJSON(json)) {
|
||
aCSPEventListener->OnCSPViolationEvent(json);
|
||
}
|
||
}
|
||
|
||
// 1. If target is not null, and global is a Window, and target’s
|
||
// shadow-including root is not global’s associated Document, set target to
|
||
// null.
|
||
RefPtr<EventTarget> eventTarget = aTriggeringElement;
|
||
|
||
nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
|
||
if (doc && aTriggeringElement &&
|
||
aTriggeringElement->GetComposedDoc() != doc) {
|
||
eventTarget = nullptr;
|
||
}
|
||
|
||
if (!eventTarget) {
|
||
// If target is a Window, set target to target’s associated Document.
|
||
eventTarget = doc;
|
||
}
|
||
|
||
if (!eventTarget && mInnerWindowID && XRE_IsParentProcess()) {
|
||
if (RefPtr<WindowGlobalParent> parent =
|
||
WindowGlobalParent::GetByInnerWindowId(mInnerWindowID)) {
|
||
nsAutoString json;
|
||
if (aViolationEventInit.ToJSON(json)) {
|
||
Unused << parent->SendDispatchSecurityPolicyViolation(json);
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
if (!eventTarget) {
|
||
// If we are here, we are probably dealing with workers. Those are handled
|
||
// via nsICSPEventListener. Nothing to do here.
|
||
return NS_OK;
|
||
}
|
||
|
||
RefPtr<mozilla::dom::Event> event =
|
||
mozilla::dom::SecurityPolicyViolationEvent::Constructor(
|
||
eventTarget, u"securitypolicyviolation"_ns, aViolationEventInit);
|
||
event->SetTrusted(true);
|
||
|
||
ErrorResult rv;
|
||
eventTarget->DispatchEvent(*event, rv);
|
||
return rv.StealNSResult();
|
||
}
|
||
|
||
/**
|
||
* Dispatched from the main thread to send reports for one CSP violation.
|
||
*/
|
||
class CSPReportSenderRunnable final : public Runnable {
|
||
public:
|
||
CSPReportSenderRunnable(
|
||
Element* aTriggeringElement, nsICSPEventListener* aCSPEventListener,
|
||
nsIURI* aBlockedURI,
|
||
nsCSPContext::BlockedContentSource aBlockedContentSource,
|
||
nsIURI* aOriginalURI, uint32_t aViolatedPolicyIndex, bool aReportOnlyFlag,
|
||
const nsAString& aViolatedDirective, const nsAString& aEffectiveDirective,
|
||
const nsAString& aObserverSubject, const nsAString& aSourceFile,
|
||
bool aReportSample, const nsAString& aScriptSample, uint32_t aLineNum,
|
||
uint32_t aColumnNum, nsCSPContext* aCSPContext)
|
||
: mozilla::Runnable("CSPReportSenderRunnable"),
|
||
mTriggeringElement(aTriggeringElement),
|
||
mCSPEventListener(aCSPEventListener),
|
||
mBlockedURI(aBlockedURI),
|
||
mBlockedContentSource(aBlockedContentSource),
|
||
mOriginalURI(aOriginalURI),
|
||
mViolatedPolicyIndex(aViolatedPolicyIndex),
|
||
mReportOnlyFlag(aReportOnlyFlag),
|
||
mReportSample(aReportSample),
|
||
mViolatedDirective(aViolatedDirective),
|
||
mEffectiveDirective(aEffectiveDirective),
|
||
mSourceFile(aSourceFile),
|
||
mScriptSample(aScriptSample),
|
||
mLineNum(aLineNum),
|
||
mColumnNum(aColumnNum),
|
||
mCSPContext(aCSPContext) {
|
||
NS_ASSERTION(!aViolatedDirective.IsEmpty(),
|
||
"Can not send reports without a violated directive");
|
||
// the observer subject is an nsISupports: either an nsISupportsCString
|
||
// from the arg passed in directly, or if that's empty, it's the blocked
|
||
// source.
|
||
if (aObserverSubject.IsEmpty() && mBlockedURI) {
|
||
mObserverSubject = aBlockedURI;
|
||
return;
|
||
}
|
||
|
||
nsAutoCString subject;
|
||
if (aObserverSubject.IsEmpty()) {
|
||
BlockedContentSourceToString(aBlockedContentSource, subject);
|
||
} else {
|
||
CopyUTF16toUTF8(aObserverSubject, subject);
|
||
}
|
||
|
||
nsCOMPtr<nsISupportsCString> supportscstr =
|
||
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID);
|
||
if (supportscstr) {
|
||
supportscstr->SetData(subject);
|
||
mObserverSubject = do_QueryInterface(supportscstr);
|
||
}
|
||
|
||
// Truncate sample string.
|
||
uint32_t length = mScriptSample.Length();
|
||
if (length > nsCSPContext::ScriptSampleMaxLength()) {
|
||
uint32_t desiredLength = nsCSPContext::ScriptSampleMaxLength();
|
||
// Don't cut off right before a low surrogate. Just include it.
|
||
if (NS_IS_LOW_SURROGATE(mScriptSample[desiredLength])) {
|
||
desiredLength++;
|
||
}
|
||
mScriptSample.Replace(nsCSPContext::ScriptSampleMaxLength(),
|
||
length - desiredLength,
|
||
nsContentUtils::GetLocalizedEllipsis());
|
||
}
|
||
}
|
||
|
||
NS_IMETHOD Run() override {
|
||
MOZ_ASSERT(NS_IsMainThread());
|
||
|
||
nsresult rv;
|
||
|
||
// 0) prepare violation data
|
||
mozilla::dom::SecurityPolicyViolationEventInit init;
|
||
|
||
nsAutoCString blockedContentSource;
|
||
BlockedContentSourceToString(mBlockedContentSource, blockedContentSource);
|
||
|
||
rv = mCSPContext->GatherSecurityPolicyViolationEventData(
|
||
mBlockedURI, blockedContentSource, mOriginalURI, mEffectiveDirective,
|
||
mViolatedPolicyIndex, mSourceFile,
|
||
mReportSample ? mScriptSample : EmptyString(), mLineNum, mColumnNum,
|
||
init);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// 1) notify observers
|
||
nsCOMPtr<nsIObserverService> observerService =
|
||
mozilla::services::GetObserverService();
|
||
if (mObserverSubject && observerService) {
|
||
rv = observerService->NotifyObservers(
|
||
mObserverSubject, CSP_VIOLATION_TOPIC, mViolatedDirective.get());
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
|
||
// 2) send reports for the policy that was violated
|
||
mCSPContext->SendReports(init, mViolatedPolicyIndex);
|
||
|
||
// 3) log to console (one per policy violation)
|
||
|
||
if (mBlockedURI) {
|
||
mBlockedURI->GetSpec(blockedContentSource);
|
||
if (blockedContentSource.Length() >
|
||
nsCSPContext::ScriptSampleMaxLength()) {
|
||
bool isData = mBlockedURI->SchemeIs("data");
|
||
if (NS_SUCCEEDED(rv) && isData &&
|
||
blockedContentSource.Length() >
|
||
nsCSPContext::ScriptSampleMaxLength()) {
|
||
blockedContentSource.Truncate(nsCSPContext::ScriptSampleMaxLength());
|
||
blockedContentSource.Append(
|
||
NS_ConvertUTF16toUTF8(nsContentUtils::GetLocalizedEllipsis()));
|
||
}
|
||
}
|
||
}
|
||
|
||
if (blockedContentSource.Length() > 0) {
|
||
nsString blockedContentSource16 =
|
||
NS_ConvertUTF8toUTF16(blockedContentSource);
|
||
AutoTArray<nsString, 2> params = {mViolatedDirective,
|
||
blockedContentSource16};
|
||
mCSPContext->logToConsole(
|
||
mReportOnlyFlag ? "CSPROViolationWithURI" : "CSPViolationWithURI",
|
||
params, mSourceFile, mScriptSample, mLineNum, mColumnNum,
|
||
nsIScriptError::errorFlag);
|
||
}
|
||
|
||
// 4) fire violation event
|
||
// A frame-ancestors violation has occurred, but we should not dispatch
|
||
// the violation event to a potentially cross-origin ancestor.
|
||
if (!mViolatedDirective.EqualsLiteral("frame-ancestors")) {
|
||
mCSPContext->FireViolationEvent(mTriggeringElement, mCSPEventListener,
|
||
init);
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
private:
|
||
RefPtr<Element> mTriggeringElement;
|
||
nsCOMPtr<nsICSPEventListener> mCSPEventListener;
|
||
nsCOMPtr<nsIURI> mBlockedURI;
|
||
nsCSPContext::BlockedContentSource mBlockedContentSource;
|
||
nsCOMPtr<nsIURI> mOriginalURI;
|
||
uint32_t mViolatedPolicyIndex;
|
||
bool mReportOnlyFlag;
|
||
bool mReportSample;
|
||
nsString mViolatedDirective;
|
||
nsString mEffectiveDirective;
|
||
nsCOMPtr<nsISupports> mObserverSubject;
|
||
nsString mSourceFile;
|
||
nsString mScriptSample;
|
||
uint32_t mLineNum;
|
||
uint32_t mColumnNum;
|
||
RefPtr<nsCSPContext> mCSPContext;
|
||
};
|
||
|
||
/**
|
||
* Asynchronously notifies any nsIObservers listening to the CSP violation
|
||
* topic that a violation occurred. Also triggers report sending and console
|
||
* logging. All asynchronous on the main thread.
|
||
*
|
||
* @param aTriggeringElement
|
||
* The element that triggered this report violation. It can be null.
|
||
* @param aBlockedContentSource
|
||
* Either a CSP Source (like 'self', as string) or nsIURI: the source
|
||
* of the violation.
|
||
* @param aOriginalUri
|
||
* The original URI if the blocked content is a redirect, else null
|
||
* @param aViolatedDirective
|
||
* the directive that was violated (string).
|
||
* @param aViolatedPolicyIndex
|
||
* the index of the policy that was violated (so we know where to send
|
||
* the reports).
|
||
* @param aObserverSubject
|
||
* optional, subject sent to the nsIObservers listening to the CSP
|
||
* violation topic.
|
||
* @param aSourceFile
|
||
* name of the file containing the inline script violation
|
||
* @param aScriptSample
|
||
* a sample of the violating inline script
|
||
* @param aLineNum
|
||
* source line number of the violation (if available)
|
||
* @param aColumnNum
|
||
* source column number of the violation (if available)
|
||
*/
|
||
nsresult nsCSPContext::AsyncReportViolation(
|
||
Element* aTriggeringElement, nsICSPEventListener* aCSPEventListener,
|
||
nsIURI* aBlockedURI, BlockedContentSource aBlockedContentSource,
|
||
nsIURI* aOriginalURI, const nsAString& aViolatedDirective,
|
||
const nsAString& aEffectiveDirective, uint32_t aViolatedPolicyIndex,
|
||
const nsAString& aObserverSubject, const nsAString& aSourceFile,
|
||
bool aReportSample, const nsAString& aScriptSample, uint32_t aLineNum,
|
||
uint32_t aColumnNum) {
|
||
EnsureIPCPoliciesRead();
|
||
NS_ENSURE_ARG_MAX(aViolatedPolicyIndex, mPolicies.Length() - 1);
|
||
|
||
nsCOMPtr<nsIRunnable> task = new CSPReportSenderRunnable(
|
||
aTriggeringElement, aCSPEventListener, aBlockedURI, aBlockedContentSource,
|
||
aOriginalURI, aViolatedPolicyIndex,
|
||
mPolicies[aViolatedPolicyIndex]->getReportOnlyFlag(), aViolatedDirective,
|
||
aEffectiveDirective, aObserverSubject, aSourceFile, aReportSample,
|
||
aScriptSample, aLineNum, aColumnNum, this);
|
||
|
||
if (XRE_IsContentProcess()) {
|
||
if (mEventTarget) {
|
||
mEventTarget->Dispatch(task.forget(), NS_DISPATCH_NORMAL);
|
||
return NS_OK;
|
||
}
|
||
}
|
||
|
||
NS_DispatchToMainThread(task.forget());
|
||
return NS_OK;
|
||
}
|
||
|
||
/**
|
||
* Based on the given loadinfo, determines if this CSP context allows the
|
||
* ancestry.
|
||
*
|
||
* In order to determine the URI of the parent document (one causing the load
|
||
* of this protected document), this function traverses all Browsing Contexts
|
||
* until it reaches the top level browsing context.
|
||
*/
|
||
NS_IMETHODIMP
|
||
nsCSPContext::PermitsAncestry(nsILoadInfo* aLoadInfo,
|
||
bool* outPermitsAncestry) {
|
||
nsresult rv;
|
||
|
||
*outPermitsAncestry = true;
|
||
|
||
RefPtr<mozilla::dom::BrowsingContext> ctx;
|
||
aLoadInfo->GetBrowsingContext(getter_AddRefs(ctx));
|
||
|
||
// extract the ancestry as an array
|
||
nsCOMArray<nsIURI> ancestorsArray;
|
||
nsCOMPtr<nsIURI> uriClone;
|
||
|
||
while (ctx) {
|
||
nsCOMPtr<nsIPrincipal> currentPrincipal;
|
||
// Generally permitsAncestry is consulted from within the
|
||
// DocumentLoadListener in the parent process. For loads of type object
|
||
// and embed it's called from the Document in the content process.
|
||
// After Bug 1646899 we should be able to remove that branching code for
|
||
// querying the currentURI.
|
||
if (XRE_IsParentProcess()) {
|
||
WindowGlobalParent* window = ctx->Canonical()->GetCurrentWindowGlobal();
|
||
if (window) {
|
||
// Using the URI of the Principal and not the document because e.g.
|
||
// about:blank inherits the principal and hence the URI of the
|
||
// document does not reflect the security context of the document.
|
||
currentPrincipal = window->DocumentPrincipal();
|
||
}
|
||
} else if (nsPIDOMWindowOuter* windowOuter = ctx->GetDOMWindow()) {
|
||
currentPrincipal = nsGlobalWindowOuter::Cast(windowOuter)->GetPrincipal();
|
||
}
|
||
|
||
if (currentPrincipal) {
|
||
nsCOMPtr<nsIURI> currentURI;
|
||
auto* currentBasePrincipal = BasePrincipal::Cast(currentPrincipal);
|
||
currentBasePrincipal->GetURI(getter_AddRefs(currentURI));
|
||
|
||
if (currentURI) {
|
||
nsAutoCString spec;
|
||
currentURI->GetSpec(spec);
|
||
// delete the userpass from the URI.
|
||
rv = NS_MutateURI(currentURI)
|
||
.SetRef(""_ns)
|
||
.SetUserPass(""_ns)
|
||
.Finalize(uriClone);
|
||
|
||
// If setUserPass fails for some reason, just return a clone of the
|
||
// current URI
|
||
if (NS_FAILED(rv)) {
|
||
rv = NS_GetURIWithoutRef(currentURI, getter_AddRefs(uriClone));
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
ancestorsArray.AppendElement(uriClone);
|
||
}
|
||
}
|
||
ctx = ctx->GetParent();
|
||
}
|
||
|
||
nsAutoString violatedDirective;
|
||
|
||
// Now that we've got the ancestry chain in ancestorsArray, time to check
|
||
// them against any CSP.
|
||
// NOTE: the ancestors are not allowed to be sent cross origin; this is a
|
||
// restriction not placed on subresource loads.
|
||
|
||
for (uint32_t a = 0; a < ancestorsArray.Length(); a++) {
|
||
if (CSPCONTEXTLOGENABLED()) {
|
||
CSPCONTEXTLOG(("nsCSPContext::PermitsAncestry, checking ancestor: %s",
|
||
ancestorsArray[a]->GetSpecOrDefault().get()));
|
||
}
|
||
// omit the ancestor URI in violation reports if cross-origin as per spec
|
||
// (it is a violation of the same-origin policy).
|
||
bool okToSendAncestor =
|
||
NS_SecurityCompareURIs(ancestorsArray[a], mSelfURI, true);
|
||
|
||
bool permits =
|
||
permitsInternal(nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE,
|
||
nullptr, // triggering element
|
||
nullptr, // nsICSPEventListener
|
||
nullptr, // nsILoadInfo
|
||
ancestorsArray[a],
|
||
nullptr, // no redirect here.
|
||
true, // specific, do not use default-src
|
||
true, // send violation reports
|
||
okToSendAncestor);
|
||
if (!permits) {
|
||
*outPermitsAncestry = false;
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::Permits(Element* aTriggeringElement,
|
||
nsICSPEventListener* aCSPEventListener, nsIURI* aURI,
|
||
CSPDirective aDir, bool aSpecific,
|
||
bool aSendViolationReports, bool* outPermits) {
|
||
// Can't perform check without aURI
|
||
if (aURI == nullptr) {
|
||
return NS_ERROR_FAILURE;
|
||
}
|
||
|
||
if (aURI->SchemeIs("resource")) {
|
||
// XXX Ideally we would call SubjectToCSP() here but that would also
|
||
// allowlist e.g. javascript: URIs which should not be allowlisted here.
|
||
// As a hotfix we just allowlist pdf.js internals here explicitly.
|
||
nsAutoCString uriSpec;
|
||
aURI->GetSpec(uriSpec);
|
||
if (StringBeginsWith(uriSpec, "resource://pdf.js/"_ns)) {
|
||
*outPermits = true;
|
||
return NS_OK;
|
||
}
|
||
}
|
||
|
||
*outPermits = permitsInternal(aDir, aTriggeringElement, aCSPEventListener,
|
||
nullptr, // no nsILoadInfo
|
||
aURI,
|
||
nullptr, // no original (pre-redirect) URI
|
||
aSpecific, aSendViolationReports,
|
||
true); // send blocked URI in violation reports
|
||
|
||
if (CSPCONTEXTLOGENABLED()) {
|
||
CSPCONTEXTLOG(("nsCSPContext::Permits, aUri: %s, aDir: %s, isAllowed: %s",
|
||
aURI->GetSpecOrDefault().get(),
|
||
CSP_CSPDirectiveToString(aDir),
|
||
*outPermits ? "allow" : "deny"));
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::ToJSON(nsAString& outCSPinJSON) {
|
||
outCSPinJSON.Truncate();
|
||
dom::CSPPolicies jsonPolicies;
|
||
jsonPolicies.mCsp_policies.Construct();
|
||
EnsureIPCPoliciesRead();
|
||
|
||
for (uint32_t p = 0; p < mPolicies.Length(); p++) {
|
||
dom::CSP jsonCSP;
|
||
mPolicies[p]->toDomCSPStruct(jsonCSP);
|
||
if (!jsonPolicies.mCsp_policies.Value().AppendElement(jsonCSP, fallible)) {
|
||
return NS_ERROR_OUT_OF_MEMORY;
|
||
}
|
||
}
|
||
|
||
// convert the gathered information to JSON
|
||
if (!jsonPolicies.ToJSON(outCSPinJSON)) {
|
||
return NS_ERROR_FAILURE;
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::GetCSPSandboxFlags(uint32_t* aOutSandboxFlags) {
|
||
if (!aOutSandboxFlags) {
|
||
return NS_ERROR_FAILURE;
|
||
}
|
||
*aOutSandboxFlags = SANDBOXED_NONE;
|
||
|
||
EnsureIPCPoliciesRead();
|
||
for (uint32_t i = 0; i < mPolicies.Length(); i++) {
|
||
uint32_t flags = mPolicies[i]->getSandboxFlags();
|
||
|
||
// current policy doesn't have sandbox flag, check next policy
|
||
if (!flags) {
|
||
continue;
|
||
}
|
||
|
||
// current policy has sandbox flags, if the policy is in enforcement-mode
|
||
// (i.e. not report-only) set these flags and check for policies with more
|
||
// restrictions
|
||
if (!mPolicies[i]->getReportOnlyFlag()) {
|
||
*aOutSandboxFlags |= flags;
|
||
} else {
|
||
// sandbox directive is ignored in report-only mode, warn about it and
|
||
// continue the loop checking for an enforcement policy.
|
||
nsAutoString policy;
|
||
mPolicies[i]->toString(policy);
|
||
|
||
CSPCONTEXTLOG(
|
||
("nsCSPContext::GetCSPSandboxFlags, report only policy, ignoring "
|
||
"sandbox in: %s",
|
||
NS_ConvertUTF16toUTF8(policy).get()));
|
||
|
||
AutoTArray<nsString, 1> params = {policy};
|
||
logToConsole("ignoringReportOnlyDirective", params, u""_ns, u""_ns, 0, 0,
|
||
nsIScriptError::warningFlag);
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
/* ========== CSPViolationReportListener implementation ========== */
|
||
|
||
NS_IMPL_ISUPPORTS(CSPViolationReportListener, nsIStreamListener,
|
||
nsIRequestObserver, nsISupports);
|
||
|
||
CSPViolationReportListener::CSPViolationReportListener() = default;
|
||
|
||
CSPViolationReportListener::~CSPViolationReportListener() = default;
|
||
|
||
nsresult AppendSegmentToString(nsIInputStream* aInputStream, void* aClosure,
|
||
const char* aRawSegment, uint32_t aToOffset,
|
||
uint32_t aCount, uint32_t* outWrittenCount) {
|
||
nsCString* decodedData = static_cast<nsCString*>(aClosure);
|
||
decodedData->Append(aRawSegment, aCount);
|
||
*outWrittenCount = aCount;
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
CSPViolationReportListener::OnDataAvailable(nsIRequest* aRequest,
|
||
nsIInputStream* aInputStream,
|
||
uint64_t aOffset, uint32_t aCount) {
|
||
uint32_t read;
|
||
nsCString decodedData;
|
||
return aInputStream->ReadSegments(AppendSegmentToString, &decodedData, aCount,
|
||
&read);
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
CSPViolationReportListener::OnStopRequest(nsIRequest* aRequest,
|
||
nsresult aStatus) {
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
CSPViolationReportListener::OnStartRequest(nsIRequest* aRequest) {
|
||
return NS_OK;
|
||
}
|
||
|
||
/* ========== CSPReportRedirectSink implementation ========== */
|
||
|
||
NS_IMPL_ISUPPORTS(CSPReportRedirectSink, nsIChannelEventSink,
|
||
nsIInterfaceRequestor);
|
||
|
||
CSPReportRedirectSink::CSPReportRedirectSink() = default;
|
||
|
||
CSPReportRedirectSink::~CSPReportRedirectSink() = default;
|
||
|
||
NS_IMETHODIMP
|
||
CSPReportRedirectSink::AsyncOnChannelRedirect(
|
||
nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aRedirFlags,
|
||
nsIAsyncVerifyRedirectCallback* aCallback) {
|
||
if (aRedirFlags & nsIChannelEventSink::REDIRECT_INTERNAL) {
|
||
aCallback->OnRedirectVerifyCallback(NS_OK);
|
||
return NS_OK;
|
||
}
|
||
|
||
// cancel the old channel so XHR failure callback happens
|
||
nsresult rv = aOldChannel->Cancel(NS_ERROR_ABORT);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// notify an observer that we have blocked the report POST due to a
|
||
// redirect, used in testing, do this async since we're in an async call now
|
||
// to begin with
|
||
nsCOMPtr<nsIURI> uri;
|
||
rv = aOldChannel->GetURI(getter_AddRefs(uri));
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsCOMPtr<nsIObserverService> observerService =
|
||
mozilla::services::GetObserverService();
|
||
NS_ASSERTION(observerService,
|
||
"Observer service required to log CSP violations");
|
||
observerService->NotifyObservers(
|
||
uri, CSP_VIOLATION_TOPIC,
|
||
u"denied redirect while sending violation report");
|
||
|
||
return NS_BINDING_REDIRECTED;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
CSPReportRedirectSink::GetInterface(const nsIID& aIID, void** aResult) {
|
||
if (aIID.Equals(NS_GET_IID(nsINetworkInterceptController)) &&
|
||
mInterceptController) {
|
||
nsCOMPtr<nsINetworkInterceptController> copy(mInterceptController);
|
||
*aResult = copy.forget().take();
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
return QueryInterface(aIID, aResult);
|
||
}
|
||
|
||
void CSPReportRedirectSink::SetInterceptController(
|
||
nsINetworkInterceptController* aInterceptController) {
|
||
mInterceptController = aInterceptController;
|
||
}
|
||
|
||
/* ===== nsISerializable implementation ====== */
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::Read(nsIObjectInputStream* aStream) {
|
||
nsresult rv;
|
||
nsCOMPtr<nsISupports> supports;
|
||
|
||
rv = NS_ReadOptionalObject(aStream, true, getter_AddRefs(supports));
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
mSelfURI = do_QueryInterface(supports);
|
||
MOZ_ASSERT(mSelfURI, "need a self URI to de-serialize");
|
||
|
||
nsAutoCString JSON;
|
||
rv = aStream->ReadCString(JSON);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsCOMPtr<nsIPrincipal> principal = BasePrincipal::FromJSON(JSON);
|
||
mLoadingPrincipal = principal;
|
||
MOZ_ASSERT(mLoadingPrincipal, "need a loadingPrincipal to de-serialize");
|
||
|
||
uint32_t numPolicies;
|
||
rv = aStream->Read32(&numPolicies);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsAutoString policyString;
|
||
|
||
while (numPolicies > 0) {
|
||
numPolicies--;
|
||
|
||
rv = aStream->ReadString(policyString);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
bool reportOnly = false;
|
||
rv = aStream->ReadBoolean(&reportOnly);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
bool deliveredViaMetaTag = false;
|
||
rv = aStream->ReadBoolean(&deliveredViaMetaTag);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
AddIPCPolicy(mozilla::ipc::ContentSecurityPolicy(policyString, reportOnly,
|
||
deliveredViaMetaTag));
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsCSPContext::Write(nsIObjectOutputStream* aStream) {
|
||
nsresult rv = NS_WriteOptionalCompoundObject(aStream, mSelfURI,
|
||
NS_GET_IID(nsIURI), true);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsAutoCString JSON;
|
||
BasePrincipal::Cast(mLoadingPrincipal)->ToJSON(JSON);
|
||
rv = aStream->WriteStringZ(JSON.get());
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
// Serialize all the policies.
|
||
aStream->Write32(mPolicies.Length() + mIPCPolicies.Length());
|
||
|
||
nsAutoString polStr;
|
||
for (uint32_t p = 0; p < mPolicies.Length(); p++) {
|
||
polStr.Truncate();
|
||
mPolicies[p]->toString(polStr);
|
||
aStream->WriteWStringZ(polStr.get());
|
||
aStream->WriteBoolean(mPolicies[p]->getReportOnlyFlag());
|
||
aStream->WriteBoolean(mPolicies[p]->getDeliveredViaMetaTagFlag());
|
||
}
|
||
for (auto& policy : mIPCPolicies) {
|
||
aStream->WriteWStringZ(policy.policy().get());
|
||
aStream->WriteBoolean(policy.reportOnlyFlag());
|
||
aStream->WriteBoolean(policy.deliveredViaMetaTagFlag());
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
void nsCSPContext::AddIPCPolicy(const ContentSecurityPolicy& aPolicy) {
|
||
mIPCPolicies.AppendElement(aPolicy);
|
||
}
|
||
|
||
void nsCSPContext::SerializePolicies(
|
||
nsTArray<ContentSecurityPolicy>& aPolicies) {
|
||
for (auto* policy : mPolicies) {
|
||
nsAutoString policyString;
|
||
policy->toString(policyString);
|
||
aPolicies.AppendElement(
|
||
ContentSecurityPolicy(policyString, policy->getReportOnlyFlag(),
|
||
policy->getDeliveredViaMetaTagFlag()));
|
||
}
|
||
|
||
aPolicies.AppendElements(mIPCPolicies);
|
||
}
|