Add m-esr52 at 52.6.0

1 files changed, 1616 insertions, 0 deletions

diff --git a/dom/security/nsCSPUtils.cpp b/dom/security/nsCSPUtils.cpp
new file mode 100644
index 0000000000..63b4aae2ce
--- /dev/null
+++ b/dom/security/nsCSPUtils.cpp
@@ -0,0 +1,1616 @@
+/* -*- 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 "nsIConsoleService.h"
+#include "nsICryptoHash.h"
+#include "nsIScriptError.h"
+#include "nsIServiceManager.h"
+#include "nsIStringBundle.h"
+#include "nsIURL.h"
+#include "nsReadableUtils.h"
+#include "nsSandboxFlags.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;
+  }
+}
+
+void
+CSP_GetLocalizedStr(const char16_t* aName,
+                    const char16_t** aParams,
+                    uint32_t aLength,
+                    char16_t** outResult)
+{
+  nsCOMPtr<nsIStringBundle> keyStringBundle;
+  nsCOMPtr<nsIStringBundleService> stringBundleService =
+    mozilla::services::GetStringBundleService();
+
+  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, aLength, outResult);
+}
+
+void
+CSP_LogStrMessage(const nsAString& aMsg)
+{
+  nsCOMPtr<nsIConsoleService> console(do_GetService("@mozilla.org/consoleservice;1"));
+
+  if (!console) {
+    return;
+  }
+  nsString msg = PromiseFlatString(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 char *aCategory,
+               uint64_t aInnerWindowID)
+{
+  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;
+  cspMsg.Append(NS_LITERAL_STRING("Content Security Policy: "));
+  cspMsg.Append(aMessage);
+
+  // 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()) {
+    cspMsg.Append(NS_LITERAL_STRING(" Source: "));
+    cspMsg.Append(aSourceLine);
+    cspMsg.Append(NS_LITERAL_STRING("."));
+  }
+
+  nsresult rv;
+  if (aInnerWindowID > 0) {
+    nsCString catStr;
+    catStr.AssignASCII(aCategory);
+    rv = error->InitWithWindowID(cspMsg, aSourceName,
+                                 aSourceLine, aLineNumber,
+                                 aColumnNumber, aFlags,
+                                 catStr, aInnerWindowID);
+  }
+  else {
+    rv = error->Init(cspMsg, aSourceName,
+                     aSourceLine, aLineNumber,
+                     aColumnNumber, aFlags,
+                     aCategory);
+  }
+  if (NS_FAILED(rv)) {
+    return;
+  }
+  console->LogMessage(error);
+}
+
+/**
+ * Combines CSP_LogMessage and CSP_GetLocalizedStr into one call.
+ */
+void
+CSP_LogLocalizedStr(const char16_t* aName,
+                    const char16_t** aParams,
+                    uint32_t aLength,
+                    const nsAString& aSourceName,
+                    const nsAString& aSourceLine,
+                    uint32_t aLineNumber,
+                    uint32_t aColumnNumber,
+                    uint32_t aFlags,
+                    const char* aCategory,
+                    uint64_t aInnerWindowID)
+{
+  nsXPIDLString logMsg;
+  CSP_GetLocalizedStr(aName, aParams, aLength, getter_Copies(logMsg));
+  CSP_LogMessage(logMsg, aSourceName, aSourceLine,
+                 aLineNumber, aColumnNumber, aFlags,
+                 aCategory, aInnerWindowID);
+}
+
+/* ===== Helpers ============================ */
+CSPDirective
+CSP_ContentTypeToDirective(nsContentPolicyType aType)
+{
+  switch (aType) {
+    case nsIContentPolicy::TYPE_IMAGE:
+    case nsIContentPolicy::TYPE_IMAGESET:
+      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:
+      return nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_STYLESHEET:
+      return nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_FONT:
+      return nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_MEDIA:
+      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_SHARED_WORKER:
+    case nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER:
+      return nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_SUBDOCUMENT:
+      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:
+      return nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_OBJECT:
+    case nsIContentPolicy::TYPE_OBJECT_SUBREQUEST:
+      return nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE;
+
+    case nsIContentPolicy::TYPE_XBL:
+    case nsIContentPolicy::TYPE_DTD:
+    case nsIContentPolicy::TYPE_OTHER:
+      return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
+
+    // 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;
+
+    // Fall through to error for all other directives
+    default:
+      MOZ_ASSERT(false, "Can not map nsContentPolicyType to CSPDirective");
+  }
+  return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
+}
+
+nsCSPHostSrc*
+CSP_CreateHostSrcFromURI(nsIURI* aURI)
+{
+  // Create the host first
+  nsCString host;
+  aURI->GetHost(host);
+  nsCSPHostSrc *hostsrc = new nsCSPHostSrc(NS_ConvertUTF8toUTF16(host));
+
+  // Add the scheme.
+  nsCString scheme;
+  aURI->GetScheme(scheme);
+  hostsrc->setScheme(NS_ConvertUTF8toUTF16(scheme));
+
+  int32_t port;
+  aURI->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_IsValidDirective(const nsAString& aDir)
+{
+  uint32_t numDirs = (sizeof(CSPStrDirectives) / sizeof(CSPStrDirectives[0]));
+
+  for (uint32_t i = 0; i < numDirs; i++) {
+    if (aDir.LowerCaseEqualsASCII(CSPStrDirectives[i])) {
+      return true;
+    }
+  }
+  return false;
+}
+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_EnumToKeyword(aKey));
+}
+
+bool
+CSP_IsQuotelessKeyword(const nsAString& aKey)
+{
+  nsString lowerKey = PromiseFlatString(aKey);
+  ToLowerCase(lowerKey);
+
+  static_assert(CSP_LAST_KEYWORD_VALUE ==
+                (sizeof(CSPStrKeywords) / sizeof(CSPStrKeywords[0])),
+                "CSP_LAST_KEYWORD_VALUE does not match length of CSPStrKeywords");
+
+  nsAutoString keyword;
+  for (uint32_t i = 0; i < CSP_LAST_KEYWORD_VALUE; i++) {
+    // skipping the leading ' and trimming the trailing '
+    keyword.AssignASCII(CSPStrKeywords[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'.
+ */
+
+bool
+permitsScheme(const nsAString& aEnforcementScheme,
+              nsIURI* aUri,
+              bool aReportOnly,
+              bool aUpgradeInsecure)
+{
+  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") &&
+      scheme.EqualsASCII("https")) {
+    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;
+  nsCharSeparatedTokenizer tokenizer(aHeaderValue, ',');
+  while (tokenizer.hasMoreTokens()) {
+    const nsSubstring& policy = tokenizer.nextToken();
+    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()
+{
+}
+
+// ::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_EnumToKeyword(aKeyword),
+              NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
+  return false;
+}
+
+/* ====== nsCSPSchemeSrc ===================== */
+
+nsCSPSchemeSrc::nsCSPSchemeSrc(const nsAString& aScheme)
+  : mScheme(aScheme)
+{
+  ToLowerCase(mScheme);
+}
+
+nsCSPSchemeSrc::~nsCSPSchemeSrc()
+{
+}
+
+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);
+}
+
+bool
+nsCSPSchemeSrc::visit(nsCSPSrcVisitor* aVisitor) const
+{
+  return aVisitor->visitSchemeSrc(*this);
+}
+
+void
+nsCSPSchemeSrc::toString(nsAString& outStr) const
+{
+  outStr.Append(mScheme);
+  outStr.AppendASCII(":");
+}
+
+/* ===== nsCSPHostSrc ======================== */
+
+nsCSPHostSrc::nsCSPHostSrc(const nsAString& aHost)
+  : mHost(aHost)
+{
+  ToLowerCase(mHost);
+}
+
+nsCSPHostSrc::~nsCSPHostSrc()
+{
+}
+
+/*
+ * 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);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  // 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) {
+    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)) {
+    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");
+
+  // 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 whitelisting any of these schemes would call nsCSPSchemeSrc::permits().
+    bool isBlobScheme =
+      (NS_SUCCEEDED(aUri->SchemeIs("blob", &isBlobScheme)) && isBlobScheme);
+    bool isDataScheme =
+      (NS_SUCCEEDED(aUri->SchemeIs("data", &isDataScheme)) && isDataScheme);
+    bool isFileScheme =
+      (NS_SUCCEEDED(aUri->SchemeIs("filesystem", &isFileScheme)) && isFileScheme);
+
+    if (isBlobScheme || isDataScheme || isFileScheme) {
+      return false;
+    }
+    return true;
+  }
+
+  // Before we can check if the host matches, we have to
+  // extract the host part from aUri.
+  nsAutoCString uriHost;
+  nsresult rv = aUri->GetHost(uriHost);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  nsString decodedUriHost;
+  CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriHost), decodedUriHost);
+
+  // 4.5) host matching: Check if the allowed host starts with a wilcard.
+  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);
+
+    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 whitelists a specific file, and we have to
+    // check if the loading resource matches that whitelisted 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 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.AppendASCII("://");
+  outStr.Append(mHost);
+
+  // append port
+  if (!mPort.IsEmpty()) {
+    outStr.AppendASCII(":");
+    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()
+{
+}
+
+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_EnumToKeyword(aKeyword),
+              CSP_EnumToKeyword(mKeyword),
+              NS_ConvertUTF16toUTF8(aHashOrNonce).get(),
+              mInvalidated ? "yes" : "false"));
+
+  if (mInvalidated) {
+    // only 'self' 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,
+               "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.
+  return ((mKeyword == aKeyword) ||
+          ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated));
+}
+
+bool
+nsCSPKeywordSrc::visit(nsCSPSrcVisitor* aVisitor) const
+{
+  return aVisitor->visitKeywordSrc(*this);
+}
+
+void
+nsCSPKeywordSrc::toString(nsAString& outStr) const
+{
+  outStr.AppendASCII(CSP_EnumToKeyword(mKeyword));
+}
+
+/* ===== nsCSPNonceSrc ==================== */
+
+nsCSPNonceSrc::nsCSPNonceSrc(const nsAString& aNonce)
+  : mNonce(aNonce)
+{
+}
+
+nsCSPNonceSrc::~nsCSPNonceSrc()
+{
+}
+
+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()));
+  }
+
+  // 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_EnumToKeyword(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.AppendASCII(CSP_EnumToKeyword(CSP_NONCE));
+  outStr.Append(mNonce);
+  outStr.AppendASCII("'");
+}
+
+/* ===== 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);
+}
+
+nsCSPHashSrc::~nsCSPHashSrc()
+{
+}
+
+bool
+nsCSPHashSrc::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
+                     bool aParserCreated) const
+{
+  CSPUTILSLOG(("nsCSPHashSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
+              CSP_EnumToKeyword(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);
+
+  nsresult rv;
+  nsCOMPtr<nsICryptoHash> hasher;
+  hasher = do_CreateInstance("@mozilla.org/security/hash;1", &rv);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  rv = hasher->InitWithString(NS_ConvertUTF16toUTF8(mAlgorithm));
+  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);
+
+  // The NSS Base64 encoder automatically adds linebreaks "\r\n" every 64
+  // characters. We need to remove these so we can properly validate longer
+  // (SHA-512) base64-encoded hashes
+  hash.StripChars("\r\n");
+  return NS_ConvertUTF16toUTF8(mHash).Equals(hash);
+}
+
+bool
+nsCSPHashSrc::visit(nsCSPSrcVisitor* aVisitor) const
+{
+  return aVisitor->visitHashSrc(*this);
+}
+
+void
+nsCSPHashSrc::toString(nsAString& outStr) const
+{
+  outStr.AppendASCII("'");
+  outStr.Append(mAlgorithm);
+  outStr.AppendASCII("-");
+  outStr.Append(mHash);
+  outStr.AppendASCII("'");
+}
+
+/* ===== nsCSPReportURI ===================== */
+
+nsCSPReportURI::nsCSPReportURI(nsIURI *aURI)
+  :mReportURI(aURI)
+{
+}
+
+nsCSPReportURI::~nsCSPReportURI()
+{
+}
+
+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()
+{
+}
+
+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_EnumToKeyword(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.AppendASCII(" ");
+
+  // Append srcs
+  uint32_t length = mSrcs.Length();
+  for (uint32_t i = 0; i < length; i++) {
+    mSrcs[i]->toString(outStr);
+    if (i != (length - 1)) {
+      outStr.AppendASCII(" ");
+    }
+  }
+}
+
+void
+nsCSPDirective::toDomCSPStruct(mozilla::dom::CSP& outCSP) const
+{
+  mozilla::dom::Sequence<nsString> srcs;
+  nsString src;
+  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
+    src.Truncate();
+    mSrcs[i]->toString(src);
+    srcs.AppendElement(src, mozilla::fallible);
+  }
+
+  switch(mDirective) {
+    case nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE:
+      outCSP.mDefault_src.Construct();
+      outCSP.mDefault_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE:
+      outCSP.mScript_src.Construct();
+      outCSP.mScript_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE:
+      outCSP.mObject_src.Construct();
+      outCSP.mObject_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE:
+      outCSP.mStyle_src.Construct();
+      outCSP.mStyle_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE:
+      outCSP.mImg_src.Construct();
+      outCSP.mImg_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE:
+      outCSP.mMedia_src.Construct();
+      outCSP.mMedia_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE:
+      outCSP.mFrame_src.Construct();
+      outCSP.mFrame_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE:
+      outCSP.mFont_src.Construct();
+      outCSP.mFont_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE:
+      outCSP.mConnect_src.Construct();
+      outCSP.mConnect_src.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE:
+      outCSP.mReport_uri.Construct();
+      outCSP.mReport_uri.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE:
+      outCSP.mFrame_ancestors.Construct();
+      outCSP.mFrame_ancestors.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE:
+      outCSP.mManifest_src.Construct();
+      outCSP.mManifest_src.Value() = mozilla::Move(srcs);
+      return;
+    // not supporting REFLECTED_XSS_DIRECTIVE
+
+    case nsIContentSecurityPolicy::BASE_URI_DIRECTIVE:
+      outCSP.mBase_uri.Construct();
+      outCSP.mBase_uri.Value() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE:
+      outCSP.mForm_action.Construct();
+      outCSP.mForm_action.Value() = mozilla::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() = mozilla::Move(srcs);
+      return;
+
+    case nsIContentSecurityPolicy::SANDBOX_DIRECTIVE:
+      outCSP.mSandbox.Construct();
+      outCSP.mSandbox.Value() = mozilla::Move(srcs);
+      return;
+
+    // REFERRER_DIRECTIVE and REQUIRE_SRI_FOR are handled in nsCSPPolicy::toDomCSPStruct()
+
+    default:
+      NS_ASSERTION(false, "cannot find directive to convert CSP to JSON");
+  }
+}
+
+
+bool
+nsCSPDirective::restrictsContentType(nsContentPolicyType aContentType) const
+{
+  // make sure we do not check for the default src before any other sources
+  if (isDefaultDirective()) {
+    return false;
+  }
+  return mDirective == CSP_ContentTypeToDirective(aContentType);
+}
+
+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);
+}
+
+/* =============== nsCSPChildSrcDirective ============= */
+
+nsCSPChildSrcDirective::nsCSPChildSrcDirective(CSPDirective aDirective)
+  : nsCSPDirective(aDirective)
+  , mHandleFrameSrc(false)
+{
+}
+
+nsCSPChildSrcDirective::~nsCSPChildSrcDirective()
+{
+}
+
+void nsCSPChildSrcDirective::setHandleFrameSrc()
+{
+  mHandleFrameSrc = true;
+}
+
+bool nsCSPChildSrcDirective::restrictsContentType(nsContentPolicyType aContentType) const
+{
+  if (aContentType == nsIContentPolicy::TYPE_SUBDOCUMENT) {
+    return mHandleFrameSrc;
+  }
+
+  return (aContentType == nsIContentPolicy::TYPE_INTERNAL_WORKER
+      || aContentType == nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER
+      || aContentType == nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER
+      );
+}
+
+bool nsCSPChildSrcDirective::equals(CSPDirective aDirective) const
+{
+  if (aDirective == nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE) {
+    return mHandleFrameSrc;
+  }
+
+  return (aDirective == nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE);
+}
+
+/* =============== nsBlockAllMixedContentDirective ============= */
+
+nsBlockAllMixedContentDirective::nsBlockAllMixedContentDirective(CSPDirective aDirective)
+: nsCSPDirective(aDirective)
+{
+}
+
+nsBlockAllMixedContentDirective::~nsBlockAllMixedContentDirective()
+{
+}
+
+void
+nsBlockAllMixedContentDirective::toString(nsAString& outStr) const
+{
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+    nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
+}
+
+/* =============== nsUpgradeInsecureDirective ============= */
+
+nsUpgradeInsecureDirective::nsUpgradeInsecureDirective(CSPDirective aDirective)
+: nsCSPDirective(aDirective)
+{
+}
+
+nsUpgradeInsecureDirective::~nsUpgradeInsecureDirective()
+{
+}
+
+void
+nsUpgradeInsecureDirective::toString(nsAString& outStr) const
+{
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+    nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
+}
+
+/* ===== nsRequireSRIForDirective ========================= */
+
+nsRequireSRIForDirective::nsRequireSRIForDirective(CSPDirective aDirective)
+: nsCSPDirective(aDirective)
+{
+}
+
+nsRequireSRIForDirective::~nsRequireSRIForDirective()
+{
+}
+
+void
+nsRequireSRIForDirective::toString(nsAString &outStr) const
+{
+  outStr.AppendASCII(CSP_CSPDirectiveToString(
+    nsIContentSecurityPolicy::REQUIRE_SRI_FOR));
+  for (uint32_t i = 0; i < mTypes.Length(); i++) {
+    if (mTypes[i] == nsIContentPolicy::TYPE_SCRIPT) {
+      outStr.AppendASCII(" script");
+    }
+    else if (mTypes[i] == nsIContentPolicy::TYPE_STYLESHEET) {
+      outStr.AppendASCII(" style");
+    }
+  }
+}
+
+bool
+nsRequireSRIForDirective::hasType(nsContentPolicyType aType) const
+{
+  for (uint32_t i = 0; i < mTypes.Length(); i++) {
+    if (mTypes[i] == aType) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool
+nsRequireSRIForDirective::restrictsContentType(const nsContentPolicyType aType) const
+{
+  return this->hasType(aType);
+}
+
+bool
+nsRequireSRIForDirective::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
+                                 bool aParserCreated) const
+{
+  // can only disallow CSP_REQUIRE_SRI_FOR.
+  return (aKeyword != CSP_REQUIRE_SRI_FOR);
+}
+
+/* ===== nsCSPPolicy ========================= */
+
+nsCSPPolicy::nsCSPPolicy()
+  : mUpgradeInsecDir(nullptr)
+  , mReportOnly(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,
+                     bool aSpecific) const
+{
+  nsString outp;
+  return this->permits(aDir, aUri, EmptyString(), false, aSpecific, false, outp);
+}
+
+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]->toString(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->toString(outViolatedDirective);
+      return false;
+    }
+    return true;
+  }
+
+  // Nothing restricts this, so we're allowing the load
+  // See bug 764937
+  return true;
+}
+
+bool
+nsCSPPolicy::allows(nsContentPolicyType aContentType,
+                    enum CSPKeyword aKeyword,
+                    const nsAString& aHashOrNonce,
+                    bool aParserCreated) const
+{
+  CSPUTILSLOG(("nsCSPPolicy::allows, aKeyWord: %s, a HashOrNonce: %s",
+              CSP_EnumToKeyword(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]->restrictsContentType(aContentType)) {
+      if (mDirectives[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
+        return true;
+      }
+      return false;
+    }
+    if (mDirectives[i]->isDefaultDirective()) {
+      defaultDir = mDirectives[i];
+    }
+  }
+
+  // {nonce,hash}-source should not consult default-src:
+  //   * return false if default-src is specified
+  //   * but allow the load if default-src is *not* specified (Bug 1198422)
+  if (aKeyword == CSP_NONCE || aKeyword == CSP_HASH) {
+     if (!defaultDir) {
+       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;
+}
+
+bool
+nsCSPPolicy::allows(nsContentPolicyType aContentType,
+                    enum CSPKeyword aKeyword) const
+{
+  return allows(aContentType, aKeyword, NS_LITERAL_STRING(""), false);
+}
+
+void
+nsCSPPolicy::toString(nsAString& outStr) const
+{
+  uint32_t length = mDirectives.Length();
+  for (uint32_t i = 0; i < length; ++i) {
+
+    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REFERRER_DIRECTIVE)) {
+      outStr.AppendASCII(CSP_CSPDirectiveToString(nsIContentSecurityPolicy::REFERRER_DIRECTIVE));
+      outStr.AppendASCII(" ");
+      outStr.Append(mReferrerPolicy);
+    } else {
+      mDirectives[i]->toString(outStr);
+    }
+    if (i != (length - 1)) {
+      outStr.AppendASCII("; ");
+    }
+  }
+}
+
+void
+nsCSPPolicy::toDomCSPStruct(mozilla::dom::CSP& outCSP) const
+{
+  outCSP.mReport_only = mReportOnly;
+
+  for (uint32_t i = 0; i < mDirectives.Length(); ++i) {
+    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REFERRER_DIRECTIVE)) {
+      mozilla::dom::Sequence<nsString> srcs;
+      srcs.AppendElement(mReferrerPolicy, mozilla::fallible);
+      outCSP.mReferrer.Construct();
+      outCSP.mReferrer.Value() = srcs;
+    } else {
+      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;
+}
+
+/*
+ * 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::getDirectiveStringForContentType(nsContentPolicyType aContentType,
+                                              nsAString& outDirective) const
+{
+  nsCSPDirective* defaultDir = nullptr;
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->restrictsContentType(aContentType)) {
+      mDirectives[i]->toString(outDirective);
+      return;
+    }
+    if (mDirectives[i]->isDefaultDirective()) {
+      defaultDir = mDirectives[i];
+    }
+  }
+  // if we haven't found a matching directive yet,
+  // the contentType must be restricted by the default directive
+  if (defaultDir) {
+    defaultDir->toString(outDirective);
+    return;
+  }
+  NS_ASSERTION(false, "Can not query directive string for contentType!");
+  outDirective.AppendASCII("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;
+}
+
+bool
+nsCSPPolicy::requireSRIForType(nsContentPolicyType aContentType)
+{
+  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
+    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REQUIRE_SRI_FOR)) {
+      return static_cast<nsRequireSRIForDirective*>(mDirectives[i])->hasType(aContentType);
+    }
+  }
+  return false;
+}