gecko-dev/dom/security/nsCSPContext.cpp

/* -*- 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 "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/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 const uint32_t CSP_CACHE_URI_CUTOFF_SIZE = 512;

#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;
  }
}

/* =====  nsIContentSecurityPolicy impl ====== */

NS_IMETHODIMP
nsCSPContext::ShouldLoad(nsContentPolicyType aContentType,
                         nsICSPEventListener* aCSPEventListener,
                         nsIURI* aContentLocation,
                         const nsACString& aMimeTypeGuess,
                         nsIURI* aOriginalURIIfRedirect,
                         bool aSendViolationReports, const nsAString& aNonce,
                         bool aParserCreated, int16_t* outDecision) {
  if (CSPCONTEXTLOGENABLED()) {
    CSPCONTEXTLOG(("nsCSPContext::ShouldLoad, aContentLocation: %s",
                   aContentLocation->GetSpecOrDefault().get()));
    CSPCONTEXTLOG((">>>>                      aContentType: %d", aContentType));
  }

  bool isPreload = nsContentUtils::IsPreloadType(aContentType);

  // Since we know whether we are dealing with a preload, we have to convert
  // the internal policytype ot the external policy type before moving on.
  // We still need to know if this is a worker so child-src can handle that
  // case correctly.
  aContentType =
      nsContentUtils::InternalContentPolicyTypeToExternalOrWorker(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, aContentLocation,
                      aOriginalURIIfRedirect, aNonce, isPreload,
                      false,  // allow fallback to default-src
                      aSendViolationReports,
                      true,  // send blocked URI in violation reports
                      aParserCreated);

  *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, nsIURI* aContentLocation,
    nsIURI* aOriginalURIIfRedirect, const nsAString& aNonce, bool aIsPreload,
    bool aSpecific, bool aSendViolationReports,
    bool aSendContentLocationInViolationReports, bool aParserCreated) {
  EnsureIPCPoliciesRead();
  bool permits = true;

  nsAutoString violatedDirective;
  for (uint32_t p = 0; p < mPolicies.Length(); p++) {
    if (!mPolicies[p]->permits(aDir, aContentLocation, aNonce,
                               !!aOriginalURIIfRedirect, aSpecific,
                               aParserCreated, 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;
      }

      // Do not send a report or notify observers 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 (!aIsPreload && 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, p,   /* policy index        */
            EmptyString(),          /* no observer subject */
            spec,                   /* source file      */
            EmptyString(),          /* no script sample    */
            lineNumber,             /* line number      */
            columnNumber);          /*  column number    */
      }
    }
  }

  return permits;
}

/* ===== nsISupports implementation ========== */

NS_IMPL_CLASSINFO(nsCSPContext, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
                  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;

  for (auto policy : aOtherContext->mPolicies) {
    nsAutoString policyStr;
    policy->toString(policyStr);
    AppendPolicy(policyStr, policy->getReportOnlyFlag(),
                 policy->getDeliveredViaMetaTagFlag());
  }
  mIPCPolicies = aOtherContext->mIPCPolicies.Clone();
  return NS_OK;
}

void nsCSPContext::EnsureIPCPoliciesRead() {
  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();
  }
}

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)) {
      *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);

  nsCSPPolicy* policy = nsCSPParser::parseContentSecurityPolicy(
      aPolicyString, mSelfURI, aReportOnly, this, aDeliveredViaMetaTag);
  if (policy) {
    if (policy->hasDirective(
            nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE)) {
      nsAutoCString selfURIspec, referrer;
      if (mSelfURI) {
        mSelfURI->GetAsciiSpec(selfURIspec);
      }
      referrer = NS_ConvertUTF16toUTF8(mReferrer);
      CSPCONTEXTLOG(
          ("nsCSPContext::AppendPolicy added UPGRADE_IF_INSECURE_DIRECTIVE "
           "self-uri=%s referrer=%s",
           selfURIspec.get(), referrer.get()));
    }

    mPolicies.AppendElement(policy);

    // set the flag on the document for CSP telemetry
    nsCOMPtr<Document> doc = do_QueryReferent(mLoadingContext);
    if (doc) {
      doc->SetHasCSP(true);
    }
  }

  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(nsIContentPolicy::TYPE_SCRIPT, CSP_UNSAFE_EVAL,
                              EmptyString(), false)) {
      // 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;
}

// Helper function to report inline violations
void nsCSPContext::reportInlineViolation(
    nsContentPolicyType aContentType, Element* aTriggeringElement,
    nsICSPEventListener* aCSPEventListener, const nsAString& aNonce,
    const nsAString& aContent, const nsAString& aViolatedDirective,
    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 = (aContentType == nsIContentPolicy::TYPE_SCRIPT)
                          ? NS_LITERAL_STRING_FROM_CSTRING(
                                SCRIPT_NONCE_VIOLATION_OBSERVER_TOPIC)
                          : NS_LITERAL_STRING_FROM_CSTRING(
                                STYLE_NONCE_VIOLATION_OBSERVER_TOPIC);
  } else {
    observerSubject = (aContentType == nsIContentPolicy::TYPE_SCRIPT)
                          ? 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
                       aViolatedPolicyIndex,           // aViolatedPolicyIndex
                       observerSubject,                // aObserverSubject
                       sourceFile,                     // aSourceFile
                       aContent,                       // aScriptSample
                       lineNumber,                     // aLineNum
                       columnNumber);                  // aColumnNum
}

NS_IMETHODIMP
nsCSPContext::GetAllowsInline(nsContentPolicyType aContentType,
                              const nsAString& aNonce, bool aParserCreated,
                              Element* aTriggeringElement,
                              nsICSPEventListener* aCSPEventListener,
                              const nsAString& aContentOfPseudoScript,
                              uint32_t aLineNumber, uint32_t aColumnNumber,
                              bool* outAllowsInline) {
  *outAllowsInline = true;

  MOZ_ASSERT(
      aContentType ==
          nsContentUtils::InternalContentPolicyTypeToExternal(aContentType),
      "We should only see external content policy types here.");

  if (aContentType != nsIContentPolicy::TYPE_SCRIPT &&
      aContentType != nsIContentPolicy::TYPE_STYLESHEET) {
    MOZ_ASSERT(false, "can only allow inline for script or style");
    return NS_OK;
  }

  EnsureIPCPoliciesRead();
  nsAutoString content(EmptyString());

  // always iterate all policies, otherwise we might not send out all reports
  for (uint32_t i = 0; i < mPolicies.Length(); i++) {
    bool allowed =
        mPolicies[i]->allows(aContentType, CSP_UNSAFE_INLINE, EmptyString(),
                             aParserCreated) ||
        mPolicies[i]->allows(aContentType, CSP_NONCE, aNonce, aParserCreated);

    // If the inlined script or style is allowed by either unsafe-inline or the
    // nonce, go ahead and shortcut this loop so we can avoid allocating
    // unecessary strings
    if (allowed) {
      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;
    }
    allowed =
        mPolicies[i]->allows(aContentType, CSP_HASH, content, 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(
          aContentType, violatedDirective, &reportSample);
      reportInlineViolation(aContentType, aTriggeringElement, aCSPEventListener,
                            aNonce, reportSample ? content : EmptyString(),
                            violatedDirective, 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
          i,                                          // aViolatedPolicyIndex
          EmptyString(),                              // aObserverSubject
          NS_ConvertUTF8toUTF16(spec),                // aSourceFile
          EmptyString(),                              // aScriptSample
          lineNumber,                                 // aLineNum
          columnNumber);                              // aColumnNum
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }

  *outAllowsNavigateTo = !atLeastOneBlock;
  return NS_OK;
}

/**
 * Reduces some code repetition for the various logging situations in
 * LogViolationDetails.
 *
 * Call-sites for the eval/inline checks recieve two return values: allows
 * and violates.  Based on those, they must choose whether to call
 * LogViolationDetails or not.  Policies that are report-only allow the
 * loads/compilations but violations should still be reported.  Not all
 * policies in this nsIContentSecurityPolicy instance will be violated,
 * which is why we must check allows() again here.
 *
 * Note: This macro uses some parameters from its caller's context:
 * p, mPolicies, this, aSourceFile, aScriptSample, aLineNum, aColumnNum,
 * blockedContentSource
 *
 * @param violationType: the VIOLATION_TYPE_* constant (partial symbol)
 *                 such as INLINE_SCRIPT
 * @param contentPolicyType: a constant from nsIContentPolicy such as
 *                           TYPE_STYLESHEET
 * @param nonceOrHash: for NONCE and HASH violations, it's the nonce or content
 *               string. For other violations, it is an empty string.
 * @param keyword: the keyword corresponding to violation (UNSAFE_INLINE for
 *                 most)
 * @param observerTopic: the observer topic string to send with the CSP
 *                 observer notifications.
 *
 * Please note that inline violations for scripts are reported within
 * GetAllowsInline() and do not call this macro, hence we can pass 'false'
 * as the argument _aParserCreated_ to allows().
 */
#define CASE_CHECK_AND_REPORT(violationType, contentPolicyType, nonceOrHash,   \
                              keyword, observerTopic)                          \
  case nsIContentSecurityPolicy::VIOLATION_TYPE_##violationType:               \
    PR_BEGIN_MACRO                                                             \
    if (!mPolicies[p]->allows(nsIContentPolicy::TYPE_##contentPolicyType,      \
                              keyword, nonceOrHash, false)) {                  \
      nsAutoString violatedDirective;                                          \
      bool reportSample = false;                                               \
      mPolicies[p]->getDirectiveStringAndReportSampleForContentType(           \
          nsIContentPolicy::TYPE_##contentPolicyType, violatedDirective,       \
          &reportSample);                                                      \
      AsyncReportViolation(                                                    \
          aTriggeringElement, aCSPEventListener, nullptr,                      \
          blockedContentSource, nullptr, violatedDirective, p,                 \
          NS_LITERAL_STRING_FROM_CSTRING(observerTopic), aSourceFile,          \
          reportSample ? aScriptSample : EmptyString(), aLineNum, aColumnNum); \
    }                                                                          \
    PR_END_MACRO;                                                              \
    break

/**
 * 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();
  for (uint32_t p = 0; p < mPolicies.Length(); p++) {
    NS_ASSERTION(mPolicies[p], "null pointer in nsTArray<nsCSPPolicy>");

    BlockedContentSource blockedContentSource = BlockedContentSource::eUnknown;
    if (aViolationType == nsIContentSecurityPolicy::VIOLATION_TYPE_EVAL) {
      blockedContentSource = BlockedContentSource::eEval;
    } else if (aViolationType ==
                   nsIContentSecurityPolicy::VIOLATION_TYPE_INLINE_SCRIPT ||
               aViolationType ==
                   nsIContentSecurityPolicy::VIOLATION_TYPE_INLINE_STYLE) {
      blockedContentSource = BlockedContentSource::eInline;
    } else {
      // All the other types should have a URL, but just in case, let's use
      // 'self' here.
      blockedContentSource = BlockedContentSource::eSelf;
    }

    switch (aViolationType) {
      CASE_CHECK_AND_REPORT(EVAL, SCRIPT, u""_ns, CSP_UNSAFE_EVAL,
                            EVAL_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(INLINE_STYLE, STYLESHEET, u""_ns, CSP_UNSAFE_INLINE,
                            INLINE_STYLE_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(INLINE_SCRIPT, SCRIPT, u""_ns, CSP_UNSAFE_INLINE,
                            INLINE_SCRIPT_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(NONCE_SCRIPT, SCRIPT, aNonce, CSP_UNSAFE_INLINE,
                            SCRIPT_NONCE_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(NONCE_STYLE, STYLESHEET, aNonce, CSP_UNSAFE_INLINE,
                            STYLE_NONCE_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(HASH_SCRIPT, SCRIPT, aContent, CSP_UNSAFE_INLINE,
                            SCRIPT_HASH_VIOLATION_OBSERVER_TOPIC);
      CASE_CHECK_AND_REPORT(HASH_STYLE, STYLESHEET, aContent, CSP_UNSAFE_INLINE,
                            STYLE_HASH_VIOLATION_OBSERVER_TOPIC);

      default:
        NS_ASSERTION(false, "LogViolationDetails with invalid type");
        break;
    }
  }
  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 = aDocument->EventTargetFor(TaskCategory::Other);

  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);

  // 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(aSourceName);
    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, aSourceName, aSourceLine, aLineNumber,
                      aColumnNumber, aSeverityFlag, category, mInnerWindowID,
                      privateWindow);
}

/**
 * Strip URI for reporting according to:
 * http://www.w3.org/TR/CSP/#violation-reports
 *
 * @param aURI
 *        The uri to be stripped for reporting
 * @param aSelfURI
 *        The uri of the protected resource
 *        which is needed to enforce the SOP.
 * @return ASCII serialization of the uri to be reported.
 */
void StripURIForReporting(nsIURI* aURI, nsIURI* aSelfURI,
                          nsACString& outStrippedURI) {
  // 1) If the origin of uri 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 isHttpFtpOrWs =
      (aURI->SchemeIs("http") || aURI->SchemeIs("https") ||
       aURI->SchemeIs("ftp") || aURI->SchemeIs("ws") || aURI->SchemeIs("wss"));

  if (!isHttpFtpOrWs) {
    // not strictly spec compliant, but what we really care about is
    // http/https and also ftp. If it's not http/https or ftp, then treat aURI
    // as if it's a globally unique identifier and just return the scheme.
    aURI->GetScheme(outStrippedURI);
    return;
  }

  // Return uri, with any fragment component removed.
  aURI->GetSpecIgnoringRef(outStrippedURI);
}

nsresult nsCSPContext::GatherSecurityPolicyViolationEventData(
    nsIURI* aBlockedURI, const nsACString& aBlockedString, nsIURI* aOriginalURI,
    nsAString& aViolatedDirective, uint32_t aViolatedPolicyIndex,
    nsAString& aSourceFile, nsAString& aScriptSample, uint32_t aLineNum,
    uint32_t aColumnNum,
    mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit) {
  EnsureIPCPoliciesRead();
  NS_ENSURE_ARG_MAX(aViolatedPolicyIndex, mPolicies.Length() - 1);

  MOZ_ASSERT(ValidateDirectiveName(aViolatedDirective),
             "Invalid directive name");

  nsresult rv;

  // document-uri
  nsAutoCString reportDocumentURI;
  StripURIForReporting(mSelfURI, mSelfURI, reportDocumentURI);
  aViolationEventInit.mDocumentURI = NS_ConvertUTF8toUTF16(reportDocumentURI);

  // referrer
  aViolationEventInit.mReferrer = mReferrer;

  // blocked-uri
  if (aBlockedURI) {
    // in case of blocking a browsing context (frame) we have to report
    // the final URI in case of a redirect. For subresources we report
    // the URI before redirects.
    nsCOMPtr<nsIURI> uriToReport;
    if (aViolatedDirective.EqualsLiteral("frame-src")) {
      uriToReport = aBlockedURI;
    } else {
      uriToReport = aOriginalURI ? aOriginalURI : aBlockedURI;
    }
    nsAutoCString reportBlockedURI;
    StripURIForReporting(uriToReport, mSelfURI, reportBlockedURI);
    aViolationEventInit.mBlockedURI = NS_ConvertUTF8toUTF16(reportBlockedURI);
  } else {
    aViolationEventInit.mBlockedURI = NS_ConvertUTF8toUTF16(aBlockedString);
  }

  // effective-directive
  // The name of the policy directive that was violated.
  aViolationEventInit.mEffectiveDirective = aViolatedDirective;

  // 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 = aViolatedDirective;

  // 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;
      sourceURI->GetSpecIgnoringRef(spec);
      aSourceFile = NS_ConvertUTF8toUTF16(spec);
    }
    aViolationEventInit.mSourceFile = aSourceFile;
  }

  // sample, max 40 chars.
  aViolationEventInit.mSample = aScriptSample;
  uint32_t length = aViolationEventInit.mSample.Length();
  if (length > ScriptSampleMaxLength()) {
    uint32_t desiredLength = ScriptSampleMaxLength();
    // Don't cut off right before a low surrogate. Just include it.
    if (NS_IS_LOW_SURROGATE(aViolationEventInit.mSample[desiredLength])) {
      desiredLength++;
    }
    aViolationEventInit.mSample.Replace(ScriptSampleMaxLength(),
                                        length - desiredLength,
                                        nsContentUtils::GetLocalizedEllipsis());
  }

  // 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;
}

nsresult nsCSPContext::SendReports(
    const mozilla::dom::SecurityPolicyViolationEventInit& aViolationEventInit,
    uint32_t aViolatedPolicyIndex) {
  EnsureIPCPoliciesRead();
  NS_ENSURE_ARG_MAX(aViolatedPolicyIndex, mPolicies.Length() - 1);

  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;

  // violated-directive
  report.mCsp_report.mViolated_directive =
      aViolationEventInit.mViolatedDirective;

  // 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 ----------- //

  nsTArray<nsString> reportURIs;
  mPolicies[aViolatedPolicyIndex]->getReportURIs(reportURIs);

  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& aObserverSubject,
      const nsAString& aSourceFile, 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),
        mViolatedDirective(aViolatedDirective),
        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);
    }
  }

  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, mViolatedDirective,
        mViolatedPolicyIndex, mSourceFile, mScriptSample, 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
    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;
  nsString mViolatedDirective;
  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,
    uint32_t aViolatedPolicyIndex, const nsAString& aObserverSubject,
    const nsAString& aSourceFile, 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,
      aObserverSubject, aSourceFile, 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<nsIURI> currentURI;
    // 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) {
        currentURI = window->GetDocumentURI();
      }
    } else if (nsPIDOMWindowOuter* windowOuter = ctx->GetDOMWindow()) {
      currentURI = windowOuter->GetDocumentURI();
    }

    if (currentURI) {
      nsAutoCString spec;
      currentURI->GetSpec(spec);
      // delete the userpass from the URI.
      rv = NS_MutateURI(currentURI)
               .SetRef(EmptyCString())
               .SetUserPass(EmptyCString())
               .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
                        ancestorsArray[a],
                        nullptr,        // no redirect here.
                        EmptyString(),  // no nonce
                        false,          // not a preload.
                        true,           // specific, do not use default-src
                        true,           // send violation reports
                        okToSendAncestor,
                        false);  // not parser created
    if (!permits) {
      *outPermitsAncestry = false;
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
nsCSPContext::Permits(Element* aTriggeringElement,
                      nsICSPEventListener* aCSPEventListener, nsIURI* aURI,
                      CSPDirective aDir, bool aSpecific, 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, aURI,
                      nullptr,        // no original (pre-redirect) URI
                      EmptyString(),  // no nonce
                      false,          // not a preload.
                      aSpecific,
                      true,    // send violation reports
                      true,    // send blocked URI in violation reports
                      false);  // not parser created

  if (CSPCONTEXTLOGENABLED()) {
    CSPCONTEXTLOG(("nsCSPContext::Permits, aUri: %s, aDir: %d, isAllowed: %s",
                   aURI->GetSpecOrDefault().get(), 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, EmptyString(),
                   EmptyString(), 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);
}