third_party/WebKit/Source/platform/weborigin/SchemeRegistry.h

/*
 * Copyright (C) 2010 Apple Inc. All Rights Reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer in the
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#ifndef SchemeRegistry_h
#define SchemeRegistry_h

#include "platform/PlatformExport.h"
#include "wtf/Allocator.h"
#include "wtf/HashMap.h"
#include "wtf/HashSet.h"
#include "wtf/text/StringHash.h"
#include "wtf/text/WTFString.h"

namespace blink {

using URLSchemesSet = HashSet<String, CaseFoldingHash>;

template <typename T>
using URLSchemesMap = HashMap<String, T, CaseFoldingHash>;

class PLATFORM_EXPORT SchemeRegistry {
  STATIC_ONLY(SchemeRegistry);

 public:
  static void initialize();

  static void registerURLSchemeAsLocal(const String&);
  static bool shouldTreatURLSchemeAsLocal(const String&);

  static void registerURLSchemeAsRestrictingMixedContent(const String&);
  static bool shouldTreatURLSchemeAsRestrictingMixedContent(const String&);

  // Subresources transported by secure schemes do not trigger mixed content
  // warnings. For example, https and data are secure schemes because they
  // cannot be corrupted by active network attackers.
  static void registerURLSchemeAsSecure(const String&);
  static bool shouldTreatURLSchemeAsSecure(const String&);

  static void registerURLSchemeAsNoAccess(const String&);
  static bool shouldTreatURLSchemeAsNoAccess(const String&);

  // Display-isolated schemes can only be displayed (in the sense of
  // SecurityOrigin::canDisplay) by documents from the same scheme.
  static void registerURLSchemeAsDisplayIsolated(const String&);
  static bool shouldTreatURLSchemeAsDisplayIsolated(const String&);

  static void registerURLSchemeAsEmptyDocument(const String&);
  static bool shouldLoadURLSchemeAsEmptyDocument(const String&);

  static void setDomainRelaxationForbiddenForURLScheme(bool forbidden,
                                                       const String&);
  static bool isDomainRelaxationForbiddenForURLScheme(const String&);

  // Such schemes should delegate to SecurityOrigin::canRequest for any URL
  // passed to SecurityOrigin::canDisplay.
  static bool canDisplayOnlyIfCanRequest(const String& scheme);

  // Schemes against which javascript: URLs should not be allowed to run (stop
  // bookmarklets from running on sensitive pages).
  static void registerURLSchemeAsNotAllowingJavascriptURLs(
      const String& scheme);
  static bool shouldTreatURLSchemeAsNotAllowingJavascriptURLs(
      const String& scheme);

  // Allow non-HTTP schemes to be registered to allow CORS requests.
  static void registerURLSchemeAsCORSEnabled(const String& scheme);
  static bool shouldTreatURLSchemeAsCORSEnabled(const String& scheme);

  // Serialize the registered schemes in a comma-separated list.
  static String listOfCORSEnabledURLSchemes();

  // "Legacy" schemes (e.g. 'ftp:', 'gopher:') which we might want to treat
  // differently from "webby" schemes.
  static bool shouldTreatURLSchemeAsLegacy(const String& scheme);

  // Schemes that can register a service worker.
  static void registerURLSchemeAsAllowingServiceWorkers(const String& scheme);
  static bool shouldTreatURLSchemeAsAllowingServiceWorkers(
      const String& scheme);

  // HTTP-like schemes that are treated as supporting the Fetch API.
  static void registerURLSchemeAsSupportingFetchAPI(const String& scheme);
  static bool shouldTreatURLSchemeAsSupportingFetchAPI(const String& scheme);

  // Schemes which override the first-/third-party checks on a Document.
  static void registerURLSchemeAsFirstPartyWhenTopLevel(const String& scheme);
  static void removeURLSchemeAsFirstPartyWhenTopLevel(const String& scheme);
  static bool shouldTreatURLSchemeAsFirstPartyWhenTopLevel(
      const String& scheme);

  // Schemes that can be used in a referrer.
  static void registerURLSchemeAsAllowedForReferrer(const String& scheme);
  static void removeURLSchemeAsAllowedForReferrer(const String& scheme);
  static bool shouldTreatURLSchemeAsAllowedForReferrer(const String& scheme);

  // Allow resources from some schemes to load on a page, regardless of its
  // Content Security Policy.
  // This enum should be kept in sync with public/web/WebSecurityPolicy.h.
  // Enforced in AssertMatchingEnums.cpp.
  enum PolicyAreas : uint32_t {
    PolicyAreaNone = 0,
    PolicyAreaImage = 1 << 0,
    PolicyAreaStyle = 1 << 1,
    // Add more policy areas as needed by clients.
    PolicyAreaAll = ~static_cast<uint32_t>(0),
  };
  static void registerURLSchemeAsBypassingContentSecurityPolicy(
      const String& scheme,
      PolicyAreas = PolicyAreaAll);
  static void removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(
      const String& scheme);
  static bool schemeShouldBypassContentSecurityPolicy(
      const String& scheme,
      PolicyAreas = PolicyAreaAll);

  // Schemes which bypass Secure Context checks defined in
  // https://w3c.github.io/webappsec/specs/powerfulfeatures/#is-origin-trustworthy.
  static void registerURLSchemeBypassingSecureContextCheck(
      const String& scheme);
  static bool schemeShouldBypassSecureContextCheck(const String& scheme);

 private:
  static const URLSchemesSet& localSchemes();
};

}  // namespace blink

#endif  // SchemeRegistry_h