gecko-dev/dom/base/nsIContentPolicy.idl
Kris Maglione 5fdcb5a5d2 Bug 1407056: Part 1 - Provide more consistent principal/origin URL to content policies. r=bz,ckerschb
We're currently fairly vague and inconsistent about the values we provide to
content policy implementations for requestOrigin and requestPrincipal. In some
cases they're the triggering principal, sometimes the loading principal,
sometimes the channel principal.

Our existing content policy implementations which require or expect a loading
principal currently retrieve it from the context node. Since no current
callers require the principal to be the loading principal, and some already
expect it to be the triggering principal (which there's currently no other way
to retrieve), I chose to pass the triggering principal whenever possible, but
use the loading principal to determine the origin URL.

As a follow-up, I'd like to change the nsIContentPolicy interface to
explicitly receive loading and triggering principals, or possibly just
LoadInfo instances, rather than poorly-defined request
origin/principal/context args. But since that may cause trouble for
comm-central, I'd rather not do it as part of this bug.

MozReview-Commit-ID: LqD9GxdzMte

--HG--
extra : rebase_source : 41ce439912ae7b895e0a3b0e660fa6ba571eb50f
2017-10-12 15:43:55 -07:00

503 lines
18 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ft=cpp tw=78 sw=2 et ts=8 : */
/* 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 "nsISupports.idl"
interface nsIURI;
interface nsIDOMNode;
interface nsIPrincipal;
/**
* The type of nsIContentPolicy::TYPE_*
*/
typedef unsigned long nsContentPolicyType;
/**
* Interface for content policy mechanism. Implementations of this
* interface can be used to control loading of various types of out-of-line
* content, or processing of certain types of in-line content.
*
* WARNING: do not block the caller from shouldLoad or shouldProcess (e.g.,
* by launching a dialog to prompt the user for something).
*/
[scriptable,uuid(caad4f1f-d047-46ac-ae9d-dc598e4fb91b)]
interface nsIContentPolicy : nsISupports
{
/**
* Indicates a unset or bogus policy type.
*/
const nsContentPolicyType TYPE_INVALID = 0;
/**
* Gecko/Firefox developers: Avoid using TYPE_OTHER. Especially for
* requests that are coming from webpages. Or requests in general which
* you expect that security checks will be done on.
* Always use a more specific type if one is available. And do not hesitate
* to add more types as appropriate.
* But if you are fairly sure that no one would care about your more specific
* type, then it's ok to use TYPE_OTHER.
*
* Extension developers: Whenever it is reasonable, use one of the existing
* content types. If none of the existing content types are right for
* something you are doing, file a bug in the Core/DOM component that
* includes a patch that adds your new content type to the end of the list of
* TYPE_* constants here. But, don't start using your new content type until
* your patch has been accepted, because it will be uncertain what exact
* value and name your new content type will have; in that interim period,
* use TYPE_OTHER. In your patch, document your new content type in the style
* of the existing ones. In the bug you file, provide a more detailed
* description of the new type of content you want Gecko to support, so that
* the existing implementations of nsIContentPolicy can be properly modified
* to deal with that new type of content.
*
* Implementations of nsIContentPolicy should treat this the same way they
* treat unknown types, because existing users of TYPE_OTHER may be converted
* to use new content types.
*
* Note that the TYPE_INTERNAL_* constants are never passed to content
* policy implementations. They are mapped to other TYPE_* constants, and
* are only intended for internal usage inside Gecko.
*/
const nsContentPolicyType TYPE_OTHER = 1;
/**
* Indicates an executable script (such as JavaScript).
*/
const nsContentPolicyType TYPE_SCRIPT = 2;
/**
* Indicates an image (e.g., IMG elements).
*/
const nsContentPolicyType TYPE_IMAGE = 3;
/**
* Indicates a stylesheet (e.g., STYLE elements).
*/
const nsContentPolicyType TYPE_STYLESHEET = 4;
/**
* Indicates a generic object (plugin-handled content typically falls under
* this category).
*/
const nsContentPolicyType TYPE_OBJECT = 5;
/**
* Indicates a document at the top-level (i.e., in a browser).
*/
const nsContentPolicyType TYPE_DOCUMENT = 6;
/**
* Indicates a document contained within another document (e.g., IFRAMEs,
* FRAMES, and OBJECTs).
*/
const nsContentPolicyType TYPE_SUBDOCUMENT = 7;
/**
* Indicates a timed refresh.
*
* shouldLoad will never get this, because it does not represent content
* to be loaded (the actual load triggered by the refresh will go through
* shouldLoad as expected).
*
* shouldProcess will get this for, e.g., META Refresh elements and HTTP
* Refresh headers.
*/
const nsContentPolicyType TYPE_REFRESH = 8;
/**
* Indicates an XBL binding request, triggered either by -moz-binding CSS
* property.
*/
const nsContentPolicyType TYPE_XBL = 9;
/**
* Indicates a ping triggered by a click on <A PING="..."> element.
*/
const nsContentPolicyType TYPE_PING = 10;
/**
* Indicates an XMLHttpRequest. Also used for document.load and for EventSource.
*/
const nsContentPolicyType TYPE_XMLHTTPREQUEST = 11;
const nsContentPolicyType TYPE_DATAREQUEST = 11; // alias
/**
* Indicates a request by a plugin.
*/
const nsContentPolicyType TYPE_OBJECT_SUBREQUEST = 12;
/**
* Indicates a DTD loaded by an XML document.
*/
const nsContentPolicyType TYPE_DTD = 13;
/**
* Indicates a font loaded via @font-face rule.
*/
const nsContentPolicyType TYPE_FONT = 14;
/**
* Indicates a video or audio load.
*/
const nsContentPolicyType TYPE_MEDIA = 15;
/**
* Indicates a WebSocket load.
*/
const nsContentPolicyType TYPE_WEBSOCKET = 16;
/**
* Indicates a Content Security Policy report.
*/
const nsContentPolicyType TYPE_CSP_REPORT = 17;
/**
* Indicates a style sheet transformation.
*/
const nsContentPolicyType TYPE_XSLT = 18;
/**
* Indicates a beacon post.
*/
const nsContentPolicyType TYPE_BEACON = 19;
/**
* Indicates a load initiated by the fetch() function from the Fetch
* specification.
*/
const nsContentPolicyType TYPE_FETCH = 20;
/**
* Indicates a <img srcset> or <picture> request.
*/
const nsContentPolicyType TYPE_IMAGESET = 21;
/**
* Indicates a web manifest.
*/
const nsContentPolicyType TYPE_WEB_MANIFEST = 22;
/**
* Indicates an internal constant for scripts loaded through script
* elements.
*
* This will be mapped to TYPE_SCRIPT before being passed to content policy
* implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_SCRIPT = 23;
/**
* Indicates an internal constant for scripts loaded through a dedicated
* worker.
*
* This will be mapped to TYPE_SCRIPT before being passed to content policy
* implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_WORKER = 24;
/**
* Indicates an internal constant for scripts loaded through a shared
* worker.
*
* This will be mapped to TYPE_SCRIPT before being passed to content policy
* implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_SHARED_WORKER = 25;
/**
* Indicates an internal constant for content loaded from embed elements.
*
* This will be mapped to TYPE_OBJECT.
*/
const nsContentPolicyType TYPE_INTERNAL_EMBED = 26;
/**
* Indicates an internal constant for content loaded from object elements.
*
* This will be mapped to TYPE_OBJECT.
*/
const nsContentPolicyType TYPE_INTERNAL_OBJECT = 27;
/**
* Indicates an internal constant for content loaded from frame elements.
*
* This will be mapped to TYPE_SUBDOCUMENT.
*/
const nsContentPolicyType TYPE_INTERNAL_FRAME = 28;
/**
* Indicates an internal constant for content loaded from iframe elements.
*
* This will be mapped to TYPE_SUBDOCUMENT.
*/
const nsContentPolicyType TYPE_INTERNAL_IFRAME = 29;
/**
* Indicates an internal constant for content loaded from audio elements.
*
* This will be mapped to TYPE_MEDIA.
*/
const nsContentPolicyType TYPE_INTERNAL_AUDIO = 30;
/**
* Indicates an internal constant for content loaded from video elements.
*
* This will be mapped to TYPE_MEDIA.
*/
const nsContentPolicyType TYPE_INTERNAL_VIDEO = 31;
/**
* Indicates an internal constant for content loaded from track elements.
*
* This will be mapped to TYPE_MEDIA.
*/
const nsContentPolicyType TYPE_INTERNAL_TRACK = 32;
/**
* Indicates an internal constant for an XMLHttpRequest.
*
* This will be mapped to TYPE_XMLHTTPREQUEST.
*/
const nsContentPolicyType TYPE_INTERNAL_XMLHTTPREQUEST = 33;
/**
* Indicates an internal constant for EventSource.
*
* This will be mapped to TYPE_DATAREQUEST.
*/
const nsContentPolicyType TYPE_INTERNAL_EVENTSOURCE = 34;
/**
* Indicates an internal constant for scripts loaded through a service
* worker.
*
* This will be mapped to TYPE_SCRIPT before being passed to content policy
* implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_SERVICE_WORKER = 35;
/**
* Indicates an internal constant for *preloaded* scripts
* loaded through script elements.
*
* This will be mapped to TYPE_SCRIPT before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_SCRIPT_PRELOAD = 36;
/**
* Indicates an internal constant for normal images.
*
* This will be mapped to TYPE_IMAGE before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_IMAGE = 37;
/**
* Indicates an internal constant for *preloaded* images.
*
* This will be mapped to TYPE_IMAGE before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_IMAGE_PRELOAD = 38;
/**
* Indicates an internal constant for normal stylesheets.
*
* This will be mapped to TYPE_STYLESHEET before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_STYLESHEET = 39;
/**
* Indicates an internal constant for *preloaded* stylesheets.
*
* This will be mapped to TYPE_STYLESHEET before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_STYLESHEET_PRELOAD = 40;
/**
* Indicates an internal constant for favicon.
*
* This will be mapped to TYPE_IMAGE before being passed
* to content policy implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_IMAGE_FAVICON = 41;
/**
* Indicates an importScripts() inside a worker script.
*
* This will be mapped to TYPE_SCRIPT before being passed to content policy
* implementations.
*/
const nsContentPolicyType TYPE_INTERNAL_WORKER_IMPORT_SCRIPTS = 42;
/* When adding new content types, please update nsContentBlocker,
* NS_CP_ContentTypeName, nsCSPContext, all nsIContentPolicy
* implementations, the static_assert in dom/cache/DBSchema.cpp,
* ChannelWrapper.webidl, ChannelWrapper.cpp, and other things that
* are not listed here that are related to nsIContentPolicy. */
//////////////////////////////////////////////////////////////////////
/**
* Returned from shouldLoad or shouldProcess if the load or process request
* is rejected based on details of the request.
*/
const short REJECT_REQUEST = -1;
/**
* Returned from shouldLoad or shouldProcess if the load/process is rejected
* based solely on its type (of the above flags).
*
* NOTE that it is not meant to stop future requests for this type--only the
* current request.
*/
const short REJECT_TYPE = -2;
/**
* Returned from shouldLoad or shouldProcess if the load/process is rejected
* based on the server it is hosted on or requested from (aContentLocation or
* aRequestOrigin), e.g., if you block an IMAGE because it is served from
* goatse.cx (even if you don't necessarily block other types from that
* server/domain).
*
* NOTE that it is not meant to stop future requests for this server--only the
* current request.
*/
const short REJECT_SERVER = -3;
/**
* Returned from shouldLoad or shouldProcess if the load/process is rejected
* based on some other criteria. Mozilla callers will handle this like
* REJECT_REQUEST; third-party implementors may, for example, use this to
* direct their own callers to consult the extra parameter for additional
* details.
*/
const short REJECT_OTHER = -4;
/**
* Returned from shouldLoad or shouldProcess if the load or process request
* is not rejected.
*/
const short ACCEPT = 1;
/**
* Should the resource at this location be loaded?
* ShouldLoad will be called before loading the resource at aContentLocation
* to determine whether to start the load at all.
*
* @param aContentType the type of content being tested. This will be one
* one of the TYPE_* constants.
*
* @param aContentLocation the location of the content being checked; must
* not be null
*
* @param aRequestOrigin OPTIONAL. the location of the resource that
* that is loading the request. This will generally
* be the URI of the loading principal for the
* resulting request (as determined by its
* LoadInfo), but may vary depending on the
* caller. Can be null if inapplicable.
*
* @param aContext OPTIONAL. the nsIDOMNode or nsIDOMWindow that
* initiated the request, or something that can QI
* to one of those; can be null if inapplicable.
* Note that for navigation events (new windows and
* link clicks), this is the NEW window.
*
* @param aMimeTypeGuess OPTIONAL. a guess for the requested content's
* MIME type, based on information available to
* the request initiator (e.g., an OBJECT's type
* attribute); does not reliably reflect the
* actual MIME type of the requested content
*
* @param aExtra an OPTIONAL argument, pass-through for non-Gecko
* callers to pass extra data to callees.
*
* @param aRequestPrincipal an OPTIONAL argument, defines the principal that
* caused the load. This is optional only for
* non-gecko code: all gecko code should set this
* argument. This should generally be the same as
* the triggering principal for the resulting
* request (as determined by its LoadInfo), but may
* vary depending on the caller. Sometimes it will
* be the loading principal or final channel
* principal instead.
*
* @return ACCEPT or REJECT_*
*
* @note shouldLoad can be called while the DOM and layout of the document
* involved is in an inconsistent state. This means that implementors of
* this method MUST NOT do any of the following:
* 1) Modify the DOM in any way (e.g. setting attributes is a no-no).
* 2) Query any DOM properties that depend on layout (e.g. offset*
* properties).
* 3) Query any DOM properties that depend on style (e.g. computed style).
* 4) Query any DOM properties that depend on the current state of the DOM
* outside the "context" node (e.g. lengths of node lists).
* 5) [JavaScript implementations only] Access properties of any sort on any
* object without using XPCNativeWrapper (either explicitly or
* implicitly). Due to various DOM0 things, this leads to item 4.
* If you do any of these things in your shouldLoad implementation, expect
* unpredictable behavior, possibly including crashes, content not showing
* up, content showing up doubled, etc. If you need to do any of the things
* above, do them off timeout or event.
*/
short shouldLoad(in nsContentPolicyType aContentType,
in nsIURI aContentLocation,
in nsIURI aRequestOrigin,
in nsISupports aContext,
in ACString aMimeTypeGuess,
in nsISupports aExtra,
[optional] in nsIPrincipal aRequestPrincipal);
/**
* Should the resource be processed?
* ShouldProcess will be called once all the information passed to it has
* been determined about the resource, typically after part of the resource
* has been loaded.
*
* @param aContentType the type of content being tested. This will be one
* one of the TYPE_* constants.
*
* @param aContentLocation OPTIONAL; the location of the resource being
* requested: MAY be, e.g., a post-redirection URI
* for the resource.
*
* @param aRequestOrigin OPTIONAL. the location of the resource that
* initiated this load request; can be null if
* inapplicable
*
* @param aContext OPTIONAL. the nsIDOMNode or nsIDOMWindow that
* initiated the request, or something that can QI
* to one of those; can be null if inapplicable.
*
* @param aMimeType the MIME type of the requested resource (e.g.,
* image/png), as reported by the networking library,
* if available (may be empty if inappropriate for
* the type, e.g., TYPE_REFRESH).
*
* @param aExtra an OPTIONAL argument, pass-through for non-Gecko
* callers to pass extra data to callees.
*
* @return ACCEPT or REJECT_*
*
* @note shouldProcess can be called while the DOM and layout of the document
* involved is in an inconsistent state. See the note on shouldLoad to see
* what this means for implementors of this method.
*/
short shouldProcess(in nsContentPolicyType aContentType,
in nsIURI aContentLocation,
in nsIURI aRequestOrigin,
in nsISupports aContext,
in ACString aMimeType,
in nsISupports aExtra,
[optional] in nsIPrincipal aRequestPrincipal);
};