gecko/docshell/base/nsAboutRedirector.cpp

154 lines
5.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et cindent: */
/* 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 "nsAboutRedirector.h"
#include "nsNetUtil.h"
#include "plstr.h"
#include "nsIScriptSecurityManager.h"
#include "nsAboutProtocolUtils.h"
NS_IMPL_ISUPPORTS1(nsAboutRedirector, nsIAboutModule)
struct RedirEntry {
const char* id;
const char* url;
uint32_t flags; // See nsIAboutModule. The URI_SAFE_FOR_UNTRUSTED_CONTENT
// flag does double duty here -- if it's not set, we don't
// drop chrome privileges.
};
/*
Entries which do not have URI_SAFE_FOR_UNTRUSTED_CONTENT will run with chrome
privileges. This is potentially dangerous. Please use
URI_SAFE_FOR_UNTRUSTED_CONTENT in the third argument to each map item below
unless your about: page really needs chrome privileges. Security review is
required before adding new map entries without
URI_SAFE_FOR_UNTRUSTED_CONTENT. Also note, however, that adding
URI_SAFE_FOR_UNTRUSTED_CONTENT will allow random web sites to link to that
URI. Perhaps we should separate the two concepts out...
*/
static RedirEntry kRedirMap[] = {
{ "", "chrome://global/content/about.xhtml",
nsIAboutModule::ALLOW_SCRIPT },
{ "about", "chrome://global/content/aboutAbout.xhtml", 0 },
{ "credits", "http://www.mozilla.org/credits/",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT },
{ "mozilla", "chrome://global/content/mozilla.xhtml",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT },
{ "plugins", "chrome://global/content/plugins.html", 0 },
{ "config", "chrome://global/content/config.xul", 0 },
#ifdef MOZ_CRASHREPORTER
{ "crashes", "chrome://global/content/crashes.xhtml", 0 },
#endif
{ "logo", "chrome://branding/content/about.png",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
{ "buildconfig", "chrome://global/content/buildconfig.html",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT },
{ "license", "chrome://global/content/license.html",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT },
{ "neterror", "chrome://global/content/netError.xhtml",
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
nsIAboutModule::ALLOW_SCRIPT |
nsIAboutModule::HIDE_FROM_ABOUTABOUT },
// aboutMemory.xhtml implements about:compartments
{ "compartments", "chrome://global/content/aboutMemory.xhtml",
nsIAboutModule::ALLOW_SCRIPT },
{ "memory", "chrome://global/content/aboutMemory.xhtml",
nsIAboutModule::ALLOW_SCRIPT },
{ "addons", "chrome://mozapps/content/extensions/extensions.xul",
nsIAboutModule::ALLOW_SCRIPT },
{ "newaddon", "chrome://mozapps/content/extensions/newaddon.xul",
nsIAboutModule::ALLOW_SCRIPT |
nsIAboutModule::HIDE_FROM_ABOUTABOUT },
{ "support", "chrome://global/content/aboutSupport.xhtml",
nsIAboutModule::ALLOW_SCRIPT }
};
static const int kRedirTotal = NS_ARRAY_LENGTH(kRedirMap);
NS_IMETHODIMP
nsAboutRedirector::NewChannel(nsIURI *aURI, nsIChannel **result)
{
NS_ENSURE_ARG_POINTER(aURI);
NS_ASSERTION(result, "must not be null");
nsresult rv;
nsAutoCString path;
rv = NS_GetAboutModuleName(aURI, path);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
if (NS_FAILED(rv))
return rv;
for (int i=0; i<kRedirTotal; i++)
{
if (!strcmp(path.get(), kRedirMap[i].id))
{
nsCOMPtr<nsIChannel> tempChannel;
rv = ioService->NewChannel(nsDependentCString(kRedirMap[i].url),
nullptr, nullptr, getter_AddRefs(tempChannel));
if (NS_FAILED(rv))
return rv;
tempChannel->SetOriginalURI(aURI);
// Keep the page from getting unnecessary privileges unless it needs them
if (kRedirMap[i].flags &
nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT)
{
// Setting the owner to null means that we'll go through the normal
// path in GetChannelPrincipal and create a codebase principal based
// on the channel's originalURI
rv = tempChannel->SetOwner(nullptr);
if (NS_FAILED(rv))
return rv;
}
NS_ADDREF(*result = tempChannel);
return rv;
}
}
NS_ERROR("nsAboutRedirector called for unknown case");
return NS_ERROR_ILLEGAL_VALUE;
}
NS_IMETHODIMP
nsAboutRedirector::GetURIFlags(nsIURI *aURI, uint32_t *result)
{
NS_ENSURE_ARG_POINTER(aURI);
nsAutoCString name;
nsresult rv = NS_GetAboutModuleName(aURI, name);
NS_ENSURE_SUCCESS(rv, rv);
for (int i=0; i < kRedirTotal; i++)
{
if (name.EqualsASCII(kRedirMap[i].id))
{
*result = kRedirMap[i].flags;
return NS_OK;
}
}
NS_ERROR("nsAboutRedirector called for unknown case");
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsAboutRedirector::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
nsAboutRedirector* about = new nsAboutRedirector();
if (about == nullptr)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(about);
nsresult rv = about->QueryInterface(aIID, aResult);
NS_RELEASE(about);
return rv;
}