Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1623 insertions, 0 deletions

diff --git a/dom/security/nsCSPUtils.cpp b/dom/security/nsCSPUtils.cpp
new file mode 100644
index 0000000000..e52802d367
--- /dev/null
+++ b/dom/security/nsCSPUtils.cpp
@@ -0,0 +1,1623 @@
+/* -*- 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 "nsAttrValue.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsContentUtils.h"
+#include "nsCSPUtils.h"
+#include "nsDebug.h"
+#include "nsCSPParser.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIConsoleService.h"
+#include "nsIChannel.h"
+#include "nsICryptoHash.h"
+#include "nsIScriptError.h"
+#include "nsIStringBundle.h"
+#include "nsIURL.h"
+#include "nsNetUtil.h"
+#include "nsReadableUtils.h"
+#include "nsSandboxFlags.h"
+#include "nsServiceManagerUtils.h"
+
+#include "mozilla/Components.h"
+#include "mozilla/dom/CSPDictionariesBinding.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/StaticPrefs_security.h"
+
+#define DEFAULT_PORT -1
+
+static mozilla::LogModule* GetCspUtilsLog() {
+  static mozilla::LazyLogModule gCspUtilsPRLog("CSPUtils");
+  return gCspUtilsPRLog;
+}
+
+#define CSPUTILSLOG(args) \
+  MOZ_LOG(GetCspUtilsLog(), mozilla::LogLevel::Debug, args)
+#define CSPUTILSLOGENABLED() \
+  MOZ_LOG_TEST(GetCspUtilsLog(), mozilla::LogLevel::Debug)
+
+void CSP_PercentDecodeStr(const nsAString& aEncStr, nsAString& outDecStr) {
+  outDecStr.Truncate();
+
+  // helper function that should not be visible outside this methods scope
+  struct local {
+    static inline char16_t convertHexDig(char16_t aHexDig) {
+      if (isNumberToken(aHexDig)) {
+        return aHexDig - '0';
+      }
+      if (aHexDig >= 'A' && aHexDig <= 'F') {
+        return aHexDig - 'A' + 10;
+      }
+      // must be a lower case character
+      // (aHexDig >= 'a' && aHexDig <= 'f')
+      return aHexDig - 'a' + 10;
+    }
+  };
+
+  const char16_t *cur, *end, *hexDig1, *hexDig2;
+  cur = aEncStr.BeginReading();
+  end = aEncStr.EndReading();
+
+  while (cur != end) {
+    // if it's not a percent sign then there is
+    // nothing to do for that character
+    if (*cur != PERCENT_SIGN) {
+      outDecStr.Append(*cur);
+      cur++;
+      continue;
+    }
+
+    // get the two hexDigs following the '%'-sign
+    hexDig1 = cur + 1;
+    hexDig2 = cur + 2;
+
+    // if there are no hexdigs after the '%' then
+    // there is nothing to do for us.
+    if (hexDig1 == end || hexDig2 == end || !isValidHexDig(*hexDig1) ||
+        !isValidHexDig(*hexDig2)) {
+      outDecStr.Append(PERCENT_SIGN);
+      cur++;
+      continue;
+    }
+
+    // decode "% hexDig1 hexDig2" into a character.
+    char16_t decChar =
+        (local::convertHexDig(*hexDig1) << 4) + local::convertHexDig(*hexDig2);
+    outDecStr.Append(decChar);
+
+    // increment 'cur' to after the second hexDig
+    cur = ++hexDig2;
+  }
+}
+
+// The Content Security Policy should be inherited for
+// local schemes like: "about", "blob", "data", or "filesystem".
+// see: https://w3c.github.io/webappsec-csp/#initialize-document-csp
+bool CSP_ShouldResponseInheritCSP(nsIChannel* aChannel) {
+  if (!aChannel) {
+    return false;
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = aChannel->GetURI(getter_AddRefs(uri));
+  NS_ENSURE_SUCCESS(rv, false);
+
+  bool isAbout = uri->SchemeIs("about");
+  if (isAbout) {
+    nsAutoCString aboutSpec;
+    rv = uri->GetSpec(aboutSpec);
+    NS_ENSURE_SUCCESS(rv, false);
+    // also allow about:blank#foo
+    if (StringBeginsWith(aboutSpec, "about:blank"_ns) ||
+        StringBeginsWith(aboutSpec, "about:srcdoc"_ns)) {
+      return true;
+    }
+  }
+
+  return uri->SchemeIs("blob") || uri->SchemeIs("data") ||
+         uri->SchemeIs("filesystem") || uri->SchemeIs("javascript");
+}
+
+void CSP_ApplyMetaCSPToDoc(mozilla::dom::Document& aDoc,
+                           const nsAString& aPolicyStr) {
+  if (aDoc.IsLoadedAsData()) {
+    return;
+  }
+
+  nsAutoString policyStr(
+      nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(
+          aPolicyStr));
+
+  if (policyStr.IsEmpty()) {
+    return;
+  }
+
+  nsCOMPtr<nsIContentSecurityPolicy> csp = aDoc.GetCsp();
+  if (!csp) {
+    MOZ_ASSERT(false, "how come there is no CSP");
+    return;
+  }
+
+  // Multiple CSPs (delivered through either header of meta tag) need to
+  // be joined together, see:
+  // https://w3c.github.io/webappsec/specs/content-security-policy/#delivery-html-meta-element
+  nsresult rv =
+      csp->AppendPolicy(policyStr,
+                        false,  // csp via meta tag can not be report only
+                        true);  // delivered through the meta tag
+  NS_ENSURE_SUCCESS_VOID(rv);
+  if (nsPIDOMWindowInner* inner = aDoc.GetInnerWindow()) {
+    inner->SetCsp(csp);
+  }
+  aDoc.ApplySettingsFromCSP(false);
+}
+
+void CSP_GetLocalizedStr(const char* aName, const nsTArray<nsString>& aParams,
+                         nsAString& outResult) {
+  nsCOMPtr<nsIStringBundle> keyStringBundle;
+  nsCOMPtr<nsIStringBundleService> stringBundleService =
+      mozilla::components::StringBundle::Service();
+
+  NS_ASSERTION(stringBundleService, "String bundle service must be present!");
+  stringBundleService->CreateBundle(
+      "chrome://global/locale/security/csp.properties",
+      getter_AddRefs(keyStringBundle));
+
+  NS_ASSERTION(keyStringBundle, "Key string bundle must be available!");
+
+  if (!keyStringBundle) {
+    return;
+  }
+  keyStringBundle->FormatStringFromName(aName, aParams, outResult);
+}
+
+void CSP_LogStrMessage(const nsAString& aMsg) {
+  nsCOMPtr<nsIConsoleService> console(
+      do_GetService("@mozilla.org/consoleservice;1"));
+
+  if (!console) {
+    return;
+  }
+  nsString msg(aMsg);
+  console->LogStringMessage(msg.get());
+}
+
+void CSP_LogMessage(const nsAString& aMessage, const nsAString& aSourceName,
+                    const nsAString& aSourceLine, uint32_t aLineNumber,
+                    uint32_t aColumnNumber, uint32_t aFlags,
+                    const nsACString& aCategory, uint64_t aInnerWindowID,
+                    bool aFromPrivateWindow) {
+  nsCOMPtr<nsIConsoleService> console(
+      do_GetService(NS_CONSOLESERVICE_CONTRACTID));
+
+  nsCOMPtr<nsIScriptError> error(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
+
+  if (!console || !error) {
+    return;
+  }
+
+  // Prepending CSP to the outgoing console message
+  nsString cspMsg;
+  CSP_GetLocalizedStr("CSPMessagePrefix",
+                      AutoTArray<nsString, 1>{nsString(aMessage)}, cspMsg);
+
+  // Currently 'aSourceLine' is not logged to the console, because similar
+  // information is already included within the source link of the message.
+  // For inline violations however, the line and column number are 0 and
+  // information contained within 'aSourceLine' can be really useful for devs.
+  // E.g. 'aSourceLine' might be: 'onclick attribute on DIV element'.
+  // In such cases we append 'aSourceLine' directly to the error message.
+  if (!aSourceLine.IsEmpty() && aLineNumber == 0) {
+    cspMsg.AppendLiteral(u"\nSource: ");
+    cspMsg.Append(aSourceLine);
+  }
+
+  // Since we are leveraging csp errors as the category names which
+  // we pass to devtools, we should prepend them with "CSP_" to
+  // allow easy distincution in devtools code. e.g.
+  // upgradeInsecureRequest -> CSP_upgradeInsecureRequest
+  nsCString category("CSP_");
+  category.Append(aCategory);
+
+  nsresult rv;
+  if (aInnerWindowID > 0) {
+    rv = error->InitWithWindowID(cspMsg, aSourceName, aSourceLine, aLineNumber,
+                                 aColumnNumber, aFlags, category,
+                                 aInnerWindowID);
+  } else {
+    rv = error->Init(cspMsg, aSourceName, aSourceLine, aLineNumber,
+                     aColumnNumber, aFlags, category, aFromPrivateWindow,
+                     true /* from chrome context */);
+  }
+  if (NS_FAILED(rv)) {
+    return;
+  }
+  console->LogMessage(error);
+}
+
+/**
+ * Combines CSP_LogMessage and CSP_GetLocalizedStr into one call.
+ */
+void CSP_LogLocalizedStr(const char* aName, const nsTArray<nsString>& aParams,
+                         const nsAString& aSourceName,
+                         const nsAString& aSourceLine, uint32_t aLineNumber,
+                         uint32_t aColumnNumber, uint32_t aFlags,
+                         const nsACString& aCategory, uint64_t aInnerWindowID,
+                         bool aFromPrivateWindow) {
+  nsAutoString logMsg;
+  CSP_GetLocalizedStr(aName, aParams, logMsg);
+  CSP_LogMessage(logMsg, aSourceName, aSourceLine, aLineNumber, aColumnNumber,
+                 aFlags, aCategory, aInnerWindowID, aFromPrivateWindow);
+}
+
+/* ===== Helpers ============================ */
+// This implements
+// https://w3c.github.io/webappsec-csp/#effective-directive-for-a-request.
+// However the spec doesn't currently cover all request destinations, which
+// we roughly represent using nsContentPolicyType.
+CSPDirective CSP_ContentTypeToDirective(nsContentPolicyType aType) {
+  switch (aType) {
+    case nsIContentPolicy::TYPE_IMAGE:
+    case nsIContentPolicy::TYPE_IMAGESET:
+    case nsIContentPolicy::TYPE_INTERNAL_IMAGE:
+    case nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD:
+    case nsIContentPolicy::TYPE_INTERNAL_IMAGE_FAVICON:
+      return nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE;
+
+    // BLock XSLT as script, see bug 910139
+    case nsIContentPolicy::TYPE_XSLT:
+    case nsIContentPolicy::TYPE_SCRIPT:
+    case nsIContentPolicy::TYPE_INTERNAL_SCRIPT:
+    case nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD:
+    case nsIContentPolicy::TYPE_INTERNAL_MODULE:
+    case nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD:
+    case nsIContentPolicy::TYPE_INTERNAL_WORKER_IMPORT_SCRIPTS:
+    case nsIContentPolicy::TYPE_INTERNAL_AUDIOWORKLET:
+    case nsIContentPolicy::TYPE_INTERNAL_PAINTWORKLET:
+    case nsIContentPolicy::TYPE_INTERNAL_CHROMEUTILS_COMPILED_SCRIPT:
+    case nsIContentPolicy::TYPE_INTERNAL_FRAME_MESSAGEMANAGER_SCRIPT:
+      // (https://github.com/w3c/webappsec-csp/issues/554)
+      // Some of these types are not explicitly defined in the spec.
+      //
+      // Chrome seems to use script-src-elem for worklet!
+      return nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_STYLESHEET:
+    case nsIContentPolicy::TYPE_INTERNAL_STYLESHEET:
+    case nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD:
+      return nsIContentSecurityPolicy::STYLE_SRC_ELEM_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_FONT:
+    case nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD:
+      return nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_MEDIA:
+    case nsIContentPolicy::TYPE_INTERNAL_AUDIO:
+    case nsIContentPolicy::TYPE_INTERNAL_VIDEO:
+    case nsIContentPolicy::TYPE_INTERNAL_TRACK:
+      return nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_WEB_MANIFEST:
+      return nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_INTERNAL_WORKER:
+    case nsIContentPolicy::TYPE_INTERNAL_WORKER_STATIC_MODULE:
+    case nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER:
+    case nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER:
+      return nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_SUBDOCUMENT:
+    case nsIContentPolicy::TYPE_INTERNAL_FRAME:
+    case nsIContentPolicy::TYPE_INTERNAL_IFRAME:
+      return nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_WEBSOCKET:
+    case nsIContentPolicy::TYPE_XMLHTTPREQUEST:
+    case nsIContentPolicy::TYPE_BEACON:
+    case nsIContentPolicy::TYPE_PING:
+    case nsIContentPolicy::TYPE_FETCH:
+    case nsIContentPolicy::TYPE_INTERNAL_XMLHTTPREQUEST:
+    case nsIContentPolicy::TYPE_INTERNAL_EVENTSOURCE:
+    case nsIContentPolicy::TYPE_INTERNAL_FETCH_PRELOAD:
+    case nsIContentPolicy::TYPE_WEB_IDENTITY:
+    case nsIContentPolicy::TYPE_WEB_TRANSPORT:
+      return nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_OBJECT:
+    case nsIContentPolicy::TYPE_OBJECT_SUBREQUEST:
+    case nsIContentPolicy::TYPE_INTERNAL_EMBED:
+    case nsIContentPolicy::TYPE_INTERNAL_OBJECT:
+      return nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_DTD:
+    case nsIContentPolicy::TYPE_OTHER:
+    case nsIContentPolicy::TYPE_SPECULATIVE:
+    case nsIContentPolicy::TYPE_INTERNAL_DTD:
+    case nsIContentPolicy::TYPE_INTERNAL_FORCE_ALLOWED_DTD:
+      return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
+
+    // CSP does not apply to webrtc connections
+    case nsIContentPolicy::TYPE_PROXIED_WEBRTC_MEDIA:
+    // csp shold not block top level loads, e.g. in case
+    // of a redirect.
+    case nsIContentPolicy::TYPE_DOCUMENT:
+    // CSP can not block csp reports
+    case nsIContentPolicy::TYPE_CSP_REPORT:
+      return nsIContentSecurityPolicy::NO_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_SAVEAS_DOWNLOAD:
+    case nsIContentPolicy::TYPE_UA_FONT:
+      return nsIContentSecurityPolicy::NO_DIRECTIVE;
+
+    // Fall through to error for all other directives
+    // Note that we should never end up here for navigate-to
+    case nsIContentPolicy::TYPE_INVALID:
+    case nsIContentPolicy::TYPE_END:
+      MOZ_ASSERT(false, "Can not map nsContentPolicyType to CSPDirective");
+      // Do not add default: so that compilers can catch the missing case.
+  }
+  return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
+}
+
+nsCSPHostSrc* CSP_CreateHostSrcFromSelfURI(nsIURI* aSelfURI) {
+  // Create the host first
+  nsCString host;
+  aSelfURI->GetAsciiHost(host);
+  nsCSPHostSrc* hostsrc = new nsCSPHostSrc(NS_ConvertUTF8toUTF16(host));
+  hostsrc->setGeneratedFromSelfKeyword();
+
+  // Add the scheme.
+  nsCString scheme;
+  aSelfURI->GetScheme(scheme);
+  hostsrc->setScheme(NS_ConvertUTF8toUTF16(scheme));
+
+  // An empty host (e.g. for data:) indicates it's effectively a unique origin.
+  // Please note that we still need to set the scheme on hostsrc (see above),
+  // because it's used for reporting.
+  if (host.EqualsLiteral("")) {
+    hostsrc->setIsUniqueOrigin();
+    // no need to query the port in that case.
+    return hostsrc;
+  }
+
+  int32_t port;
+  aSelfURI->GetPort(&port);
+  // Only add port if it's not default port.
+  if (port > 0) {
+    nsAutoString portStr;
+    portStr.AppendInt(port);
+    hostsrc->setPort(portStr);
+  }
+  return hostsrc;
+}
+
+bool CSP_IsEmptyDirective(const nsAString& aValue, const nsAString& aDir) {
+  return (aDir.Length() == 0 && aValue.Length() == 0);
+}
+bool CSP_IsDirective(const nsAString& aValue, CSPDirective aDir) {
+  return aValue.LowerCaseEqualsASCII(CSP_CSPDirectiveToString(aDir));
+}
+
+bool CSP_IsKeyword(const nsAString& aValue, enum CSPKeyword aKey) {
+  return aValue.LowerCaseEqualsASCII(CSP_EnumToUTF8Keyword(aKey));
+}
+
+bool CSP_IsQuotelessKeyword(const nsAString& aKey) {
+  nsString lowerKey;
+  ToLowerCase(aKey, lowerKey);
+
+  nsAutoString keyword;
+  for (uint32_t i = 0; i < CSP_LAST_KEYWORD_VALUE; i++) {
+    // skipping the leading ' and trimming the trailing '
+    keyword.AssignASCII(gCSPUTF8Keywords[i] + 1);
+    keyword.Trim("'", false, true);
+    if (lowerKey.Equals(keyword)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/*
+ * Checks whether the current directive permits a specific
+ * scheme. This function is called from nsCSPSchemeSrc() and
+ * also nsCSPHostSrc.
+ * @param aEnforcementScheme
+ *        The scheme that this directive allows
+ * @param aUri
+ *        The uri of the subresource load.
+ * @param aReportOnly
+ *        Whether the enforced policy is report only or not.
+ * @param aUpgradeInsecure
+ *        Whether the policy makes use of the directive
+ *        'upgrade-insecure-requests'.
+ * @param aFromSelfURI
+ *        Whether a scheme was generated from the keyword 'self'
+ *        which then allows schemeless sources to match ws and wss.
+ */
+
+bool permitsScheme(const nsAString& aEnforcementScheme, nsIURI* aUri,
+                   bool aReportOnly, bool aUpgradeInsecure, bool aFromSelfURI) {
+  nsAutoCString scheme;
+  nsresult rv = aUri->GetScheme(scheme);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  // no scheme to enforce, let's allow the load (e.g. script-src *)
+  if (aEnforcementScheme.IsEmpty()) {
+    return true;
+  }
+
+  // if the scheme matches, all good - allow the load
+  if (aEnforcementScheme.EqualsASCII(scheme.get())) {
+    return true;
+  }
+
+  // allow scheme-less sources where the protected resource is http
+  // and the load is https, see:
+  // http://www.w3.org/TR/CSP2/#match-source-expression
+  if (aEnforcementScheme.EqualsASCII("http")) {
+    if (scheme.EqualsASCII("https")) {
+      return true;
+    }
+    if ((scheme.EqualsASCII("ws") || scheme.EqualsASCII("wss")) &&
+        aFromSelfURI) {
+      return true;
+    }
+  }
+  if (aEnforcementScheme.EqualsASCII("https")) {
+    if (scheme.EqualsLiteral("wss") && aFromSelfURI) {
+      return true;
+    }
+  }
+  if (aEnforcementScheme.EqualsASCII("ws") && scheme.EqualsASCII("wss")) {
+    return true;
+  }
+
+  // Allow the load when enforcing upgrade-insecure-requests with the
+  // promise the request gets upgraded from http to https and ws to wss.
+  // See nsHttpChannel::Connect() and also WebSocket.cpp. Please note,
+  // the report only policies should not allow the load and report
+  // the error back to the page.
+  return (
+      (aUpgradeInsecure && !aReportOnly) &&
+      ((scheme.EqualsASCII("http") &&
+        aEnforcementScheme.EqualsASCII("https")) ||
+       (scheme.EqualsASCII("ws") && aEnforcementScheme.EqualsASCII("wss"))));
+}
+
+/*
+ * A helper function for appending a CSP header to an existing CSP
+ * policy.
+ *
+ * @param aCsp           the CSP policy
+ * @param aHeaderValue   the header
+ * @param aReportOnly    is this a report-only header?
+ */
+
+nsresult CSP_AppendCSPFromHeader(nsIContentSecurityPolicy* aCsp,
+                                 const nsAString& aHeaderValue,
+                                 bool aReportOnly) {
+  NS_ENSURE_ARG(aCsp);
+
+  // Need to tokenize the header value since multiple headers could be
+  // concatenated into one comma-separated list of policies.
+  // See RFC2616 section 4.2 (last paragraph)
+  nsresult rv = NS_OK;
+  for (const nsAString& policy :
+       nsCharSeparatedTokenizer(aHeaderValue, ',').ToRange()) {
+    rv = aCsp->AppendPolicy(policy, aReportOnly, false);
+    NS_ENSURE_SUCCESS(rv, rv);
+    {
+      CSPUTILSLOG(("CSP refined with policy: \"%s\"",
+                   NS_ConvertUTF16toUTF8(policy).get()));
+    }
+  }
+  return NS_OK;
+}
+
+/* ===== nsCSPSrc ============================ */
+
+nsCSPBaseSrc::nsCSPBaseSrc() : mInvalidated(false) {}
+
+nsCSPBaseSrc::~nsCSPBaseSrc() = default;
+
+// ::permits is only called for external load requests, therefore:
+// nsCSPKeywordSrc and nsCSPHashSource fall back to this base class
+// implementation which will never allow the load.
+bool nsCSPBaseSrc::permits(nsIURI* aUri, const nsAString& aNonce,
+                           bool aWasRedirected, bool aReportOnly,
+                           bool aUpgradeInsecure, bool aParserCreated) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(
+        ("nsCSPBaseSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
+  }
+  return false;
+}
+
+// ::allows is only called for inlined loads, therefore:
+// nsCSPSchemeSrc, nsCSPHostSrc fall back
+// to this base class implementation which will never allow the load.
+bool nsCSPBaseSrc::allows(enum CSPKeyword aKeyword,
+                          const nsAString& aHashOrNonce,
+                          bool aParserCreated) const {
+  CSPUTILSLOG(("nsCSPBaseSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
+               aKeyword == CSP_HASH ? "hash" : CSP_EnumToUTF8Keyword(aKeyword),
+               NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+  return false;
+}
+
+/* ====== nsCSPSchemeSrc ===================== */
+
+nsCSPSchemeSrc::nsCSPSchemeSrc(const nsAString& aScheme) : mScheme(aScheme) {
+  ToLowerCase(mScheme);
+}
+
+nsCSPSchemeSrc::~nsCSPSchemeSrc() = default;
+
+bool nsCSPSchemeSrc::permits(nsIURI* aUri, const nsAString& aNonce,
+                             bool aWasRedirected, bool aReportOnly,
+                             bool aUpgradeInsecure, bool aParserCreated) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(
+        ("nsCSPSchemeSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
+  }
+  MOZ_ASSERT((!mScheme.EqualsASCII("")), "scheme can not be the empty string");
+  if (mInvalidated) {
+    return false;
+  }
+  return permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure, false);
+}
+
+bool nsCSPSchemeSrc::visit(nsCSPSrcVisitor* aVisitor) const {
+  return aVisitor->visitSchemeSrc(*this);
+}
+
+void nsCSPSchemeSrc::toString(nsAString& outStr) const {
+  outStr.Append(mScheme);
+  outStr.AppendLiteral(":");
+}
+
+/* ===== nsCSPHostSrc ======================== */
+
+nsCSPHostSrc::nsCSPHostSrc(const nsAString& aHost)
+    : mHost(aHost),
+      mGeneratedFromSelfKeyword(false),
+      mIsUniqueOrigin(false),
+      mWithinFrameAncstorsDir(false) {
+  ToLowerCase(mHost);
+}
+
+nsCSPHostSrc::~nsCSPHostSrc() = default;
+
+/*
+ * Checks whether the current directive permits a specific port.
+ * @param aEnforcementScheme
+ *        The scheme that this directive allows
+ *        (used to query the default port for that scheme)
+ * @param aEnforcementPort
+ *        The port that this directive allows
+ * @param aResourceURI
+ *        The uri of the subresource load
+ */
+bool permitsPort(const nsAString& aEnforcementScheme,
+                 const nsAString& aEnforcementPort, nsIURI* aResourceURI) {
+  // If enforcement port is the wildcard, don't block the load.
+  if (aEnforcementPort.EqualsASCII("*")) {
+    return true;
+  }
+
+  int32_t resourcePort;
+  nsresult rv = aResourceURI->GetPort(&resourcePort);
+  if (NS_FAILED(rv) && aEnforcementPort.IsEmpty()) {
+    // If we cannot get a Port (e.g. because of an Custom Protocol handler)
+    // We need to check if a default port is associated with the Scheme
+    if (aEnforcementScheme.IsEmpty()) {
+      return false;
+    }
+    int defaultPortforScheme =
+        NS_GetDefaultPort(NS_ConvertUTF16toUTF8(aEnforcementScheme).get());
+
+    // If there is no default port associated with the Scheme (
+    // defaultPortforScheme == -1) or it is an externally handled protocol (
+    // defaultPortforScheme == 0 ) and the csp does not enforce a port - we can
+    // allow not having a port
+    return (defaultPortforScheme == -1 || defaultPortforScheme == -0);
+  }
+  // Avoid unnecessary string creation/manipulation and don't block the
+  // load if the resource to be loaded uses the default port for that
+  // scheme and there is no port to be enforced.
+  // Note, this optimization relies on scheme checks within permitsScheme().
+  if (resourcePort == DEFAULT_PORT && aEnforcementPort.IsEmpty()) {
+    return true;
+  }
+
+  // By now we know at that either the resourcePort does not use the default
+  // port or there is a port restriction to be enforced. A port value of -1
+  // corresponds to the protocol's default port (eg. -1 implies port 80 for
+  // http URIs), in such a case we have to query the default port of the
+  // resource to be loaded.
+  if (resourcePort == DEFAULT_PORT) {
+    nsAutoCString resourceScheme;
+    rv = aResourceURI->GetScheme(resourceScheme);
+    NS_ENSURE_SUCCESS(rv, false);
+    resourcePort = NS_GetDefaultPort(resourceScheme.get());
+  }
+
+  // If there is a port to be enforced and the ports match, then
+  // don't block the load.
+  nsString resourcePortStr;
+  resourcePortStr.AppendInt(resourcePort);
+  if (aEnforcementPort.Equals(resourcePortStr)) {
+    return true;
+  }
+
+  // If there is no port to be enforced, query the default port for the load.
+  nsString enforcementPort(aEnforcementPort);
+  if (enforcementPort.IsEmpty()) {
+    // For scheme less sources, our parser always generates a scheme
+    // which is the scheme of the protected resource.
+    MOZ_ASSERT(!aEnforcementScheme.IsEmpty(),
+               "need a scheme to query default port");
+    int32_t defaultEnforcementPort =
+        NS_GetDefaultPort(NS_ConvertUTF16toUTF8(aEnforcementScheme).get());
+    enforcementPort.Truncate();
+    enforcementPort.AppendInt(defaultEnforcementPort);
+  }
+
+  // If default ports match, don't block the load
+  if (enforcementPort.Equals(resourcePortStr)) {
+    return true;
+  }
+
+  // Additional port matching where the regular URL matching algorithm
+  // treats insecure ports as matching their secure variants.
+  // default port for http is  :80
+  // default port for https is :443
+  if (enforcementPort.EqualsLiteral("80") &&
+      resourcePortStr.EqualsLiteral("443")) {
+    return true;
+  }
+
+  // ports do not match, block the load.
+  return false;
+}
+
+bool nsCSPHostSrc::permits(nsIURI* aUri, const nsAString& aNonce,
+                           bool aWasRedirected, bool aReportOnly,
+                           bool aUpgradeInsecure, bool aParserCreated) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(
+        ("nsCSPHostSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
+  }
+
+  if (mInvalidated || mIsUniqueOrigin) {
+    return false;
+  }
+
+  // we are following the enforcement rules from the spec, see:
+  // http://www.w3.org/TR/CSP11/#match-source-expression
+
+  // 4.3) scheme matching: Check if the scheme matches.
+  if (!permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure,
+                     mGeneratedFromSelfKeyword)) {
+    return false;
+  }
+
+  // The host in nsCSpHostSrc should never be empty. In case we are enforcing
+  // just a specific scheme, the parser should generate a nsCSPSchemeSource.
+  NS_ASSERTION((!mHost.IsEmpty()), "host can not be the empty string");
+
+  // Before we can check if the host matches, we have to
+  // extract the host part from aUri.
+  nsAutoCString uriHost;
+  nsresult rv = aUri->GetAsciiHost(uriHost);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  nsString decodedUriHost;
+  CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriHost), decodedUriHost);
+
+  // 2) host matching: Enforce a single *
+  if (mHost.EqualsASCII("*")) {
+    // The single ASTERISK character (*) does not match a URI's scheme of a type
+    // designating a globally unique identifier (such as blob:, data:, or
+    // filesystem:) At the moment firefox does not support filesystem; but for
+    // future compatibility we support it in CSP according to the spec,
+    // see: 4.2.2 Matching Source Expressions Note, that allowlisting any of
+    // these schemes would call nsCSPSchemeSrc::permits().
+    if (aUri->SchemeIs("blob") || aUri->SchemeIs("data") ||
+        aUri->SchemeIs("filesystem")) {
+      return false;
+    }
+
+    // If no scheme is present there also wont be a port and folder to check
+    // which means we can return early
+    if (mScheme.IsEmpty()) {
+      return true;
+    }
+  }
+  // 4.5) host matching: Check if the allowed host starts with a wilcard.
+  else if (mHost.First() == '*') {
+    NS_ASSERTION(
+        mHost[1] == '.',
+        "Second character needs to be '.' whenever host starts with '*'");
+
+    // Eliminate leading "*", but keeping the FULL STOP (.) thereafter before
+    // checking if the remaining characters match
+    nsString wildCardHost = mHost;
+    wildCardHost = Substring(wildCardHost, 1, wildCardHost.Length() - 1);
+    if (!StringEndsWith(decodedUriHost, wildCardHost)) {
+      return false;
+    }
+  }
+  // 4.6) host matching: Check if hosts match.
+  else if (!mHost.Equals(decodedUriHost)) {
+    return false;
+  }
+
+  // Port matching: Check if the ports match.
+  if (!permitsPort(mScheme, mPort, aUri)) {
+    return false;
+  }
+
+  // 4.9) Path matching: If there is a path, we have to enforce
+  // path-level matching, unless the channel got redirected, see:
+  // http://www.w3.org/TR/CSP11/#source-list-paths-and-redirects
+  if (!aWasRedirected && !mPath.IsEmpty()) {
+    // converting aUri into nsIURL so we can strip query and ref
+    // example.com/test#foo     -> example.com/test
+    // example.com/test?val=foo -> example.com/test
+    nsCOMPtr<nsIURL> url = do_QueryInterface(aUri);
+    if (!url) {
+      NS_ASSERTION(false, "can't QI into nsIURI");
+      return false;
+    }
+    nsAutoCString uriPath;
+    rv = url->GetFilePath(uriPath);
+    NS_ENSURE_SUCCESS(rv, false);
+
+    if (mWithinFrameAncstorsDir) {
+      // no path matching for frame-ancestors to not leak any path information.
+      return true;
+    }
+
+    nsString decodedUriPath;
+    CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriPath), decodedUriPath);
+
+    // check if the last character of mPath is '/'; if so
+    // we just have to check loading resource is within
+    // the allowed path.
+    if (mPath.Last() == '/') {
+      if (!StringBeginsWith(decodedUriPath, mPath)) {
+        return false;
+      }
+    }
+    // otherwise mPath refers to a specific file, and we have to
+    // check if the loading resource matches the file.
+    else {
+      if (!mPath.Equals(decodedUriPath)) {
+        return false;
+      }
+    }
+  }
+
+  // At the end: scheme, host, port and path match -> allow the load.
+  return true;
+}
+
+bool nsCSPHostSrc::visit(nsCSPSrcVisitor* aVisitor) const {
+  return aVisitor->visitHostSrc(*this);
+}
+
+void nsCSPHostSrc::toString(nsAString& outStr) const {
+  if (mGeneratedFromSelfKeyword) {
+    outStr.AppendLiteral("'self'");
+    return;
+  }
+
+  // If mHost is a single "*", we append the wildcard and return.
+  if (mHost.EqualsASCII("*") && mScheme.IsEmpty() && mPort.IsEmpty()) {
+    outStr.Append(mHost);
+    return;
+  }
+
+  // append scheme
+  outStr.Append(mScheme);
+
+  // append host
+  outStr.AppendLiteral("://");
+  outStr.Append(mHost);
+
+  // append port
+  if (!mPort.IsEmpty()) {
+    outStr.AppendLiteral(":");
+    outStr.Append(mPort);
+  }
+
+  // append path
+  outStr.Append(mPath);
+}
+
+void nsCSPHostSrc::setScheme(const nsAString& aScheme) {
+  mScheme = aScheme;
+  ToLowerCase(mScheme);
+}
+
+void nsCSPHostSrc::setPort(const nsAString& aPort) { mPort = aPort; }
+
+void nsCSPHostSrc::appendPath(const nsAString& aPath) { mPath.Append(aPath); }
+
+/* ===== nsCSPKeywordSrc ===================== */
+
+nsCSPKeywordSrc::nsCSPKeywordSrc(enum CSPKeyword aKeyword)
+    : mKeyword(aKeyword) {
+  NS_ASSERTION((aKeyword != CSP_SELF),
+               "'self' should have been replaced in the parser");
+}
+
+nsCSPKeywordSrc::~nsCSPKeywordSrc() = default;
+
+bool nsCSPKeywordSrc::permits(nsIURI* aUri, const nsAString& aNonce,
+                              bool aWasRedirected, bool aReportOnly,
+                              bool aUpgradeInsecure,
+                              bool aParserCreated) const {
+  // no need to check for invalidated, this will always return false unless
+  // it is an nsCSPKeywordSrc for 'strict-dynamic', which should allow non
+  // parser created scripts.
+  return ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated);
+}
+
+bool nsCSPKeywordSrc::allows(enum CSPKeyword aKeyword,
+                             const nsAString& aHashOrNonce,
+                             bool aParserCreated) const {
+  CSPUTILSLOG(
+      ("nsCSPKeywordSrc::allows, aKeyWord: %s, aHashOrNonce: %s, mInvalidated: "
+       "%s",
+       CSP_EnumToUTF8Keyword(aKeyword),
+       NS_ConvertUTF16toUTF8(aHashOrNonce).get(),
+       mInvalidated ? "true" : "false"));
+
+  if (mInvalidated) {
+    // only 'self', 'report-sample' and 'unsafe-inline' are keywords that can be
+    // ignored. Please note that the parser already translates 'self' into a uri
+    // (see assertion in constructor).
+    MOZ_ASSERT(mKeyword == CSP_UNSAFE_INLINE || mKeyword == CSP_REPORT_SAMPLE,
+               "should only invalidate unsafe-inline");
+    return false;
+  }
+  // either the keyword allows the load or the policy contains 'strict-dynamic',
+  // in which case we have to make sure the script is not parser created before
+  // allowing the load and also eval & wasm-eval should be blocked even if
+  // 'strict-dynamic' is present. Should be allowed only if 'unsafe-eval' is
+  // present.
+  return ((mKeyword == aKeyword) ||
+          ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated &&
+           aKeyword != CSP_UNSAFE_EVAL && aKeyword != CSP_WASM_UNSAFE_EVAL));
+}
+
+bool nsCSPKeywordSrc::visit(nsCSPSrcVisitor* aVisitor) const {
+  return aVisitor->visitKeywordSrc(*this);
+}
+
+void nsCSPKeywordSrc::toString(nsAString& outStr) const {
+  outStr.Append(CSP_EnumToUTF16Keyword(mKeyword));
+}
+
+/* ===== nsCSPNonceSrc ==================== */
+
+nsCSPNonceSrc::nsCSPNonceSrc(const nsAString& aNonce) : mNonce(aNonce) {}
+
+nsCSPNonceSrc::~nsCSPNonceSrc() = default;
+
+bool nsCSPNonceSrc::permits(nsIURI* aUri, const nsAString& aNonce,
+                            bool aWasRedirected, bool aReportOnly,
+                            bool aUpgradeInsecure, bool aParserCreated) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(("nsCSPNonceSrc::permits, aUri: %s, aNonce: %s",
+                 aUri->GetSpecOrDefault().get(),
+                 NS_ConvertUTF16toUTF8(aNonce).get()));
+  }
+
+  if (aReportOnly && aWasRedirected && aNonce.IsEmpty()) {
+    /* Fix for Bug 1505412
+     *  If we land here, we're currently handling a script-preload which got
+     *  redirected. Preloads do not have any info about the nonce assiociated.
+     *  Because of Report-Only the preload passes the 1st CSP-check so the
+     *  preload does not get retried with a nonce attached.
+     *  Currently we're relying on the script-manager to
+     *  provide a fake loadinfo to check the preloads against csp.
+     *  So during HTTPChannel->OnRedirect we cant check csp for this case.
+     *  But as the script-manager already checked the csp,
+     *  a report would already have been send,
+     *  if the nonce didnt match.
+     *  So we can pass the check here for Report-Only Cases.
+     */
+    MOZ_ASSERT(aParserCreated == false,
+               "Skipping nonce-check is only allowed for Preloads");
+    return true;
+  }
+
+  // nonces can not be invalidated by strict-dynamic
+  return mNonce.Equals(aNonce);
+}
+
+bool nsCSPNonceSrc::allows(enum CSPKeyword aKeyword,
+                           const nsAString& aHashOrNonce,
+                           bool aParserCreated) const {
+  CSPUTILSLOG(("nsCSPNonceSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
+               CSP_EnumToUTF8Keyword(aKeyword),
+               NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+
+  if (aKeyword != CSP_NONCE) {
+    return false;
+  }
+  // nonces can not be invalidated by strict-dynamic
+  return mNonce.Equals(aHashOrNonce);
+}
+
+bool nsCSPNonceSrc::visit(nsCSPSrcVisitor* aVisitor) const {
+  return aVisitor->visitNonceSrc(*this);
+}
+
+void nsCSPNonceSrc::toString(nsAString& outStr) const {
+  outStr.Append(CSP_EnumToUTF16Keyword(CSP_NONCE));
+  outStr.Append(mNonce);
+  outStr.AppendLiteral("'");
+}
+
+/* ===== nsCSPHashSrc ===================== */
+
+nsCSPHashSrc::nsCSPHashSrc(const nsAString& aAlgo, const nsAString& aHash)
+    : mAlgorithm(aAlgo), mHash(aHash) {
+  // Only the algo should be rewritten to lowercase, the hash must remain the
+  // same.
+  ToLowerCase(mAlgorithm);
+  // Normalize the base64url encoding to base64 encoding:
+  char16_t* cur = mHash.BeginWriting();
+  char16_t* end = mHash.EndWriting();
+
+  for (; cur < end; ++cur) {
+    if (char16_t('-') == *cur) {
+      *cur = char16_t('+');
+    }
+    if (char16_t('_') == *cur) {
+      *cur = char16_t('/');
+    }
+  }
+}
+
+nsCSPHashSrc::~nsCSPHashSrc() = default;
+
+bool nsCSPHashSrc::allows(enum CSPKeyword aKeyword,
+                          const nsAString& aHashOrNonce,
+                          bool aParserCreated) const {
+  CSPUTILSLOG(("nsCSPHashSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
+               CSP_EnumToUTF8Keyword(aKeyword),
+               NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+
+  if (aKeyword != CSP_HASH) {
+    return false;
+  }
+
+  // hashes can not be invalidated by strict-dynamic
+
+  // Convert aHashOrNonce to UTF-8
+  NS_ConvertUTF16toUTF8 utf8_hash(aHashOrNonce);
+
+  nsCOMPtr<nsICryptoHash> hasher;
+  nsresult rv = NS_NewCryptoHash(NS_ConvertUTF16toUTF8(mAlgorithm),
+                                 getter_AddRefs(hasher));
+  NS_ENSURE_SUCCESS(rv, false);
+
+  rv = hasher->Update((uint8_t*)utf8_hash.get(), utf8_hash.Length());
+  NS_ENSURE_SUCCESS(rv, false);
+
+  nsAutoCString hash;
+  rv = hasher->Finish(true, hash);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  return NS_ConvertUTF16toUTF8(mHash).Equals(hash);
+}
+
+bool nsCSPHashSrc::visit(nsCSPSrcVisitor* aVisitor) const {
+  return aVisitor->visitHashSrc(*this);
+}
+
+void nsCSPHashSrc::toString(nsAString& outStr) const {
+  outStr.AppendLiteral("'");
+  outStr.Append(mAlgorithm);
+  outStr.AppendLiteral("-");
+  outStr.Append(mHash);
+  outStr.AppendLiteral("'");
+}
+
+/* ===== nsCSPReportURI ===================== */
+
+nsCSPReportURI::nsCSPReportURI(nsIURI* aURI) : mReportURI(aURI) {}
+
+nsCSPReportURI::~nsCSPReportURI() = default;
+
+bool nsCSPReportURI::visit(nsCSPSrcVisitor* aVisitor) const { return false; }
+
+void nsCSPReportURI::toString(nsAString& outStr) const {
+  nsAutoCString spec;
+  nsresult rv = mReportURI->GetSpec(spec);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+  outStr.AppendASCII(spec.get());
+}
+
+/* ===== nsCSPSandboxFlags ===================== */
+
+nsCSPSandboxFlags::nsCSPSandboxFlags(const nsAString& aFlags) : mFlags(aFlags) {
+  ToLowerCase(mFlags);
+}
+
+nsCSPSandboxFlags::~nsCSPSandboxFlags() = default;
+
+bool nsCSPSandboxFlags::visit(nsCSPSrcVisitor* aVisitor) const { return false; }
+
+void nsCSPSandboxFlags::toString(nsAString& outStr) const {
+  outStr.Append(mFlags);
+}
+
+/* ===== nsCSPDirective ====================== */
+
+nsCSPDirective::nsCSPDirective(CSPDirective aDirective) {
+  mDirective = aDirective;
+}
+
+nsCSPDirective::~nsCSPDirective() {
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    delete mSrcs[i];
+  }
+}
+
+bool nsCSPDirective::permits(nsIURI* aUri, const nsAString& aNonce,
+                             bool aWasRedirected, bool aReportOnly,
+                             bool aUpgradeInsecure, bool aParserCreated) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(
+        ("nsCSPDirective::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
+  }
+
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    if (mSrcs[i]->permits(aUri, aNonce, aWasRedirected, aReportOnly,
+                          aUpgradeInsecure, aParserCreated)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool nsCSPDirective::allows(enum CSPKeyword aKeyword,
+                            const nsAString& aHashOrNonce,
+                            bool aParserCreated) const {
+  CSPUTILSLOG(("nsCSPDirective::allows, aKeyWord: %s, a HashOrNonce: %s",
+               CSP_EnumToUTF8Keyword(aKeyword),
+               NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    if (mSrcs[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+void nsCSPDirective::toString(nsAString& outStr) const {
+  // Append directive name
+  outStr.AppendASCII(CSP_CSPDirectiveToString(mDirective));
+  outStr.AppendLiteral(" ");
+
+  // Append srcs
+  StringJoinAppend(outStr, u" "_ns, mSrcs,
+                   [](nsAString& dest, nsCSPBaseSrc* cspBaseSrc) {
+                     cspBaseSrc->toString(dest);
+                   });
+}
+
+void nsCSPDirective::toDomCSPStruct(mozilla::dom::CSP& outCSP) const {
+  mozilla::dom::Sequence<nsString> srcs;
+  nsString src;
+  if (NS_WARN_IF(!srcs.SetCapacity(mSrcs.Length(), mozilla::fallible))) {
+    MOZ_ASSERT(false,
+               "Not enough memory for 'sources' sequence in "
+               "nsCSPDirective::toDomCSPStruct().");
+    return;
+  }
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    src.Truncate();
+    mSrcs[i]->toString(src);
+    if (!srcs.AppendElement(src, mozilla::fallible)) {
+      MOZ_ASSERT(false,
+                 "Failed to append to 'sources' sequence in "
+                 "nsCSPDirective::toDomCSPStruct().");
+    }
+  }
+
+  switch (mDirective) {
+    case nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE:
+      outCSP.mDefault_src.Construct();
+      outCSP.mDefault_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE:
+      outCSP.mScript_src.Construct();
+      outCSP.mScript_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE:
+      outCSP.mObject_src.Construct();
+      outCSP.mObject_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE:
+      outCSP.mStyle_src.Construct();
+      outCSP.mStyle_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE:
+      outCSP.mImg_src.Construct();
+      outCSP.mImg_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE:
+      outCSP.mMedia_src.Construct();
+      outCSP.mMedia_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE:
+      outCSP.mFrame_src.Construct();
+      outCSP.mFrame_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE:
+      outCSP.mFont_src.Construct();
+      outCSP.mFont_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE:
+      outCSP.mConnect_src.Construct();
+      outCSP.mConnect_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE:
+      outCSP.mReport_uri.Construct();
+      outCSP.mReport_uri.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE:
+      outCSP.mFrame_ancestors.Construct();
+      outCSP.mFrame_ancestors.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE:
+      outCSP.mManifest_src.Construct();
+      outCSP.mManifest_src.Value() = std::move(srcs);
+      return;
+      // not supporting REFLECTED_XSS_DIRECTIVE
+
+    case nsIContentSecurityPolicy::BASE_URI_DIRECTIVE:
+      outCSP.mBase_uri.Construct();
+      outCSP.mBase_uri.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE:
+      outCSP.mForm_action.Construct();
+      outCSP.mForm_action.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT:
+      outCSP.mBlock_all_mixed_content.Construct();
+      // does not have any srcs
+      return;
+
+    case nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE:
+      outCSP.mUpgrade_insecure_requests.Construct();
+      // does not have any srcs
+      return;
+
+    case nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE:
+      outCSP.mChild_src.Construct();
+      outCSP.mChild_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SANDBOX_DIRECTIVE:
+      outCSP.mSandbox.Construct();
+      outCSP.mSandbox.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE:
+      outCSP.mWorker_src.Construct();
+      outCSP.mWorker_src.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE:
+      outCSP.mScript_src_elem.Construct();
+      outCSP.mScript_src_elem.Value() = std::move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SCRIPT_SRC_ATTR_DIRECTIVE:
+      outCSP.mScript_src_attr.Construct();
+      outCSP.mScript_src_attr.Value() = std::move(srcs);
+      return;
+
+    default:
+      NS_ASSERTION(false, "cannot find directive to convert CSP to JSON");
+  }
+}
+
+void nsCSPDirective::getReportURIs(nsTArray<nsString>& outReportURIs) const {
+  NS_ASSERTION((mDirective == nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE),
+               "not a report-uri directive");
+
+  // append uris
+  nsString tmpReportURI;
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    tmpReportURI.Truncate();
+    mSrcs[i]->toString(tmpReportURI);
+    outReportURIs.AppendElement(tmpReportURI);
+  }
+}
+
+bool nsCSPDirective::visitSrcs(nsCSPSrcVisitor* aVisitor) const {
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    if (!mSrcs[i]->visit(aVisitor)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool nsCSPDirective::equals(CSPDirective aDirective) const {
+  return (mDirective == aDirective);
+}
+
+void nsCSPDirective::getDirName(nsAString& outStr) const {
+  outStr.AppendASCII(CSP_CSPDirectiveToString(mDirective));
+}
+
+bool nsCSPDirective::hasReportSampleKeyword() const {
+  for (nsCSPBaseSrc* src : mSrcs) {
+    if (src->isReportSample()) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/* =============== nsCSPChildSrcDirective ============= */
+
+nsCSPChildSrcDirective::nsCSPChildSrcDirective(CSPDirective aDirective)
+    : nsCSPDirective(aDirective),
+      mRestrictFrames(false),
+      mRestrictWorkers(false) {}
+
+nsCSPChildSrcDirective::~nsCSPChildSrcDirective() = default;
+
+bool nsCSPChildSrcDirective::equals(CSPDirective aDirective) const {
+  if (aDirective == nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE) {
+    return mRestrictFrames;
+  }
+  if (aDirective == nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE) {
+    return mRestrictWorkers;
+  }
+  return (mDirective == aDirective);
+}
+
+/* =============== nsCSPScriptSrcDirective ============= */
+
+nsCSPScriptSrcDirective::nsCSPScriptSrcDirective(CSPDirective aDirective)
+    : nsCSPDirective(aDirective) {}
+
+nsCSPScriptSrcDirective::~nsCSPScriptSrcDirective() = default;
+
+bool nsCSPScriptSrcDirective::equals(CSPDirective aDirective) const {
+  if (aDirective == nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE) {
+    return mRestrictWorkers;
+  }
+  if (aDirective == nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE) {
+    return mRestrictScriptElem;
+  }
+  if (aDirective == nsIContentSecurityPolicy::SCRIPT_SRC_ATTR_DIRECTIVE) {
+    return mRestrictScriptAttr;
+  }
+  return mDirective == aDirective;
+}
+
+/* =============== nsCSPStyleSrcDirective ============= */
+
+nsCSPStyleSrcDirective::nsCSPStyleSrcDirective(CSPDirective aDirective)
+    : nsCSPDirective(aDirective) {}
+
+nsCSPStyleSrcDirective::~nsCSPStyleSrcDirective() = default;
+
+bool nsCSPStyleSrcDirective::equals(CSPDirective aDirective) const {
+  if (aDirective == nsIContentSecurityPolicy::STYLE_SRC_ELEM_DIRECTIVE) {
+    return mRestrictStyleElem;
+  }
+  if (aDirective == nsIContentSecurityPolicy::STYLE_SRC_ATTR_DIRECTIVE) {
+    return mRestrictStyleAttr;
+  }
+  return mDirective == aDirective;
+}
+
+/* =============== nsBlockAllMixedContentDirective ============= */
+
+nsBlockAllMixedContentDirective::nsBlockAllMixedContentDirective(
+    CSPDirective aDirective)
+    : nsCSPDirective(aDirective) {}
+
+nsBlockAllMixedContentDirective::~nsBlockAllMixedContentDirective() = default;
+
+void nsBlockAllMixedContentDirective::toString(nsAString& outStr) const {
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+      nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
+}
+
+void nsBlockAllMixedContentDirective::getDirName(nsAString& outStr) const {
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+      nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
+}
+
+/* =============== nsUpgradeInsecureDirective ============= */
+
+nsUpgradeInsecureDirective::nsUpgradeInsecureDirective(CSPDirective aDirective)
+    : nsCSPDirective(aDirective) {}
+
+nsUpgradeInsecureDirective::~nsUpgradeInsecureDirective() = default;
+
+void nsUpgradeInsecureDirective::toString(nsAString& outStr) const {
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+      nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
+}
+
+void nsUpgradeInsecureDirective::getDirName(nsAString& outStr) const {
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+      nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
+}
+
+/* ===== nsCSPPolicy ========================= */
+
+nsCSPPolicy::nsCSPPolicy()
+    : mUpgradeInsecDir(nullptr),
+      mReportOnly(false),
+      mDeliveredViaMetaTag(false) {
+  CSPUTILSLOG(("nsCSPPolicy::nsCSPPolicy"));
+}
+
+nsCSPPolicy::~nsCSPPolicy() {
+  CSPUTILSLOG(("nsCSPPolicy::~nsCSPPolicy"));
+
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    delete mDirectives[i];
+  }
+}
+
+bool nsCSPPolicy::permits(CSPDirective aDir, nsIURI* aUri,
+                          const nsAString& aNonce, bool aWasRedirected,
+                          bool aSpecific, bool aParserCreated,
+                          nsAString& outViolatedDirective) const {
+  if (CSPUTILSLOGENABLED()) {
+    CSPUTILSLOG(("nsCSPPolicy::permits, aUri: %s, aDir: %d, aSpecific: %s",
+                 aUri->GetSpecOrDefault().get(), aDir,
+                 aSpecific ? "true" : "false"));
+  }
+
+  NS_ASSERTION(aUri, "permits needs an uri to perform the check!");
+  outViolatedDirective.Truncate();
+
+  nsCSPDirective* defaultDir = nullptr;
+
+  // Try to find a relevant directive
+  // These directive arrays are short (1-5 elements), not worth using a
+  // hashtable.
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(aDir)) {
+      if (!mDirectives[i]->permits(aUri, aNonce, aWasRedirected, mReportOnly,
+                                   mUpgradeInsecDir, aParserCreated)) {
+        mDirectives[i]->getDirName(outViolatedDirective);
+        return false;
+      }
+      return true;
+    }
+    if (mDirectives[i]->isDefaultDirective()) {
+      defaultDir = mDirectives[i];
+    }
+  }
+
+  // If the above loop runs through, we haven't found a matching directive.
+  // Avoid relooping, just store the result of default-src while looping.
+  if (!aSpecific && defaultDir) {
+    if (!defaultDir->permits(aUri, aNonce, aWasRedirected, mReportOnly,
+                             mUpgradeInsecDir, aParserCreated)) {
+      defaultDir->getDirName(outViolatedDirective);
+      return false;
+    }
+    return true;
+  }
+
+  // Nothing restricts this, so we're allowing the load
+  // See bug 764937
+  return true;
+}
+
+bool nsCSPPolicy::allows(CSPDirective aDirective, enum CSPKeyword aKeyword,
+                         const nsAString& aHashOrNonce,
+                         bool aParserCreated) const {
+  CSPUTILSLOG(("nsCSPPolicy::allows, aKeyWord: %s, a HashOrNonce: %s",
+               CSP_EnumToUTF8Keyword(aKeyword),
+               NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+
+  nsCSPDirective* defaultDir = nullptr;
+
+  // Try to find a matching directive
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->isDefaultDirective()) {
+      defaultDir = mDirectives[i];
+      continue;
+    }
+    if (mDirectives[i]->equals(aDirective)) {
+      if (mDirectives[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
+        return true;
+      }
+      return false;
+    }
+  }
+
+  // If the above loop runs through, we haven't found a matching directive.
+  // Avoid relooping, just store the result of default-src while looping.
+  if (defaultDir) {
+    return defaultDir->allows(aKeyword, aHashOrNonce, aParserCreated);
+  }
+
+  // Allowing the load; see Bug 885433
+  // a) inline scripts (also unsafe eval) should only be blocked
+  //    if there is a [script-src] or [default-src]
+  // b) inline styles should only be blocked
+  //    if there is a [style-src] or [default-src]
+  return true;
+}
+
+void nsCSPPolicy::toString(nsAString& outStr) const {
+  StringJoinAppend(outStr, u"; "_ns, mDirectives,
+                   [](nsAString& dest, nsCSPDirective* cspDirective) {
+                     cspDirective->toString(dest);
+                   });
+}
+
+void nsCSPPolicy::toDomCSPStruct(mozilla::dom::CSP& outCSP) const {
+  outCSP.mReport_only = mReportOnly;
+
+  for (uint32_t i = 0; i < mDirectives.Length(); ++i) {
+    mDirectives[i]->toDomCSPStruct(outCSP);
+  }
+}
+
+bool nsCSPPolicy::hasDirective(CSPDirective aDir) const {
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(aDir)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool nsCSPPolicy::allowsNavigateTo(nsIURI* aURI, bool aWasRedirected,
+                                   bool aEnforceAllowlist) const {
+  bool allowsNavigateTo = true;
+
+  for (unsigned long i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(
+            nsIContentSecurityPolicy::NAVIGATE_TO_DIRECTIVE)) {
+      // Early return if we can skip the allowlist AND 'unsafe-allow-redirects'
+      // is present.
+      if (!aEnforceAllowlist &&
+          mDirectives[i]->allows(CSP_UNSAFE_ALLOW_REDIRECTS, u""_ns, false)) {
+        return true;
+      }
+      // Otherwise, check against the allowlist.
+      if (!mDirectives[i]->permits(aURI, u""_ns, aWasRedirected, false, false,
+                                   false)) {
+        allowsNavigateTo = false;
+      }
+    }
+  }
+
+  return allowsNavigateTo;
+}
+
+/*
+ * Use this function only after ::allows() returned 'false'. Most and
+ * foremost it's used to get the violated directive before sending reports.
+ * The parameter outDirective is the equivalent of 'outViolatedDirective'
+ * for the ::permits() function family.
+ */
+void nsCSPPolicy::getDirectiveStringAndReportSampleForContentType(
+    CSPDirective aDirective, nsAString& outDirective,
+    bool* aReportSample) const {
+  MOZ_ASSERT(aReportSample);
+  *aReportSample = false;
+
+  nsCSPDirective* defaultDir = nullptr;
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->isDefaultDirective()) {
+      defaultDir = mDirectives[i];
+      continue;
+    }
+    if (mDirectives[i]->equals(aDirective)) {
+      mDirectives[i]->getDirName(outDirective);
+      *aReportSample = mDirectives[i]->hasReportSampleKeyword();
+      return;
+    }
+  }
+  // if we haven't found a matching directive yet,
+  // the contentType must be restricted by the default directive
+  if (defaultDir) {
+    defaultDir->getDirName(outDirective);
+    *aReportSample = defaultDir->hasReportSampleKeyword();
+    return;
+  }
+  NS_ASSERTION(false, "Can not query directive string for contentType!");
+  outDirective.AppendLiteral("couldNotQueryViolatedDirective");
+}
+
+void nsCSPPolicy::getDirectiveAsString(CSPDirective aDir,
+                                       nsAString& outDirective) const {
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(aDir)) {
+      mDirectives[i]->toString(outDirective);
+      return;
+    }
+  }
+}
+
+/*
+ * Helper function that returns the underlying bit representation of sandbox
+ * flags. The function returns SANDBOXED_NONE if there are no sandbox
+ * directives.
+ */
+uint32_t nsCSPPolicy::getSandboxFlags() const {
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(nsIContentSecurityPolicy::SANDBOX_DIRECTIVE)) {
+      nsAutoString flags;
+      mDirectives[i]->toString(flags);
+
+      if (flags.IsEmpty()) {
+        return SANDBOX_ALL_FLAGS;
+      }
+
+      nsAttrValue attr;
+      attr.ParseAtomArray(flags);
+
+      return nsContentUtils::ParseSandboxAttributeToFlags(&attr);
+    }
+  }
+
+  return SANDBOXED_NONE;
+}
+
+void nsCSPPolicy::getReportURIs(nsTArray<nsString>& outReportURIs) const {
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(
+            nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE)) {
+      mDirectives[i]->getReportURIs(outReportURIs);
+      return;
+    }
+  }
+}
+
+bool nsCSPPolicy::visitDirectiveSrcs(CSPDirective aDir,
+                                     nsCSPSrcVisitor* aVisitor) const {
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(aDir)) {
+      return mDirectives[i]->visitSrcs(aVisitor);
+    }
+  }
+  return false;
+}