1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "nsAboutRedirector.h"
8 #include "nsNetUtil.h"
9 #include "nsAboutProtocolUtils.h"
10 #include "mozilla/ArrayUtils.h"
11 #include "nsIProtocolHandler.h"
12
13 NS_IMPL_ISUPPORTS(nsAboutRedirector, nsIAboutModule)
14
15 struct RedirEntry {
16 const char* id;
17 const char* url;
18 uint32_t flags;
19 };
20
21 /*
22 Entries which do not have URI_SAFE_FOR_UNTRUSTED_CONTENT will run with chrome
23 privileges. This is potentially dangerous. Please use
24 URI_SAFE_FOR_UNTRUSTED_CONTENT in the third argument to each map item below
25 unless your about: page really needs chrome privileges. Security review is
26 required before adding new map entries without
27 URI_SAFE_FOR_UNTRUSTED_CONTENT. Also note, however, that adding
28 URI_SAFE_FOR_UNTRUSTED_CONTENT will allow random web sites to link to that
29 URI. Perhaps we should separate the two concepts out...
30 */
31 static const RedirEntry kRedirMap[] = {
32 {"about", "chrome://global/content/aboutAbout.xhtml", 0},
33 {"addons", "chrome://mozapps/content/extensions/extensions.xul",
34 nsIAboutModule::ALLOW_SCRIPT},
35 {"buildconfig", "chrome://global/content/buildconfig.html",
36 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
37 {"checkerboard", "chrome://global/content/aboutCheckerboard.xhtml",
38 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
39 nsIAboutModule::ALLOW_SCRIPT},
40 {"config", "chrome://global/content/config.xul", 0},
41 #ifdef MOZ_CRASHREPORTER
42 {"crashes", "chrome://global/content/crashes.xhtml", 0},
43 #endif
44 {"credits", "https://www.mozilla.org/credits/",
45 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
46 {"license", "chrome://global/content/license.html",
47 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
48 nsIAboutModule::MAKE_LINKABLE},
49 {"logo", "chrome://branding/content/about.png",
50 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
51 // Linkable for testing reasons.
52 nsIAboutModule::MAKE_LINKABLE},
53 {"memory", "chrome://global/content/aboutMemory.xhtml",
54 nsIAboutModule::ALLOW_SCRIPT},
55 {"mozilla", "chrome://global/content/mozilla.xhtml",
56 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
57 {"neterror", "chrome://global/content/netError.xhtml",
58 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
59 nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT |
60 nsIAboutModule::HIDE_FROM_ABOUTABOUT},
61 {"networking", "chrome://global/content/aboutNetworking.xhtml",
62 nsIAboutModule::ALLOW_SCRIPT},
63 {"newaddon", "chrome://mozapps/content/extensions/newaddon.xul",
64 nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::HIDE_FROM_ABOUTABOUT},
65 {"performance", "chrome://global/content/aboutPerformance.xhtml",
66 nsIAboutModule::ALLOW_SCRIPT},
67 {"plugins", "chrome://global/content/plugins.html",
68 nsIAboutModule::URI_MUST_LOAD_IN_CHILD},
69 {"serviceworkers", "chrome://global/content/aboutServiceWorkers.xhtml",
70 nsIAboutModule::URI_CAN_LOAD_IN_CHILD |
71 nsIAboutModule::URI_MUST_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT},
72 #ifndef ANDROID
73 {"profiles", "chrome://global/content/aboutProfiles.xhtml",
74 nsIAboutModule::ALLOW_SCRIPT},
75 #endif
76 // about:srcdoc is unresolvable by specification. It is included here
77 // because the security manager would disallow srcdoc iframes otherwise.
78 {"srcdoc", "about:blank",
79 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
80 nsIAboutModule::HIDE_FROM_ABOUTABOUT |
81 // Needs to be linkable so content can touch its own srcdoc frames
82 nsIAboutModule::MAKE_LINKABLE | nsIAboutModule::URI_CAN_LOAD_IN_CHILD},
83 {"support", "chrome://global/content/aboutSupport.xhtml",
84 nsIAboutModule::ALLOW_SCRIPT},
85 {"telemetry", "chrome://global/content/aboutTelemetry.xhtml",
86 nsIAboutModule::ALLOW_SCRIPT},
87 {"url-classifier", "chrome://global/content/aboutUrlClassifier.xhtml",
88 nsIAboutModule::ALLOW_SCRIPT},
89 {"webrtc", "chrome://global/content/aboutwebrtc/aboutWebrtc.html",
90 nsIAboutModule::ALLOW_SCRIPT},
91 {"printpreview", "about:blank",
92 nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
93 nsIAboutModule::HIDE_FROM_ABOUTABOUT |
94 nsIAboutModule::URI_CAN_LOAD_IN_CHILD}};
95 static const int kRedirTotal = mozilla::ArrayLength(kRedirMap);
96
97 NS_IMETHODIMP
NewChannel(nsIURI * aURI,nsILoadInfo * aLoadInfo,nsIChannel ** aResult)98 nsAboutRedirector::NewChannel(nsIURI* aURI, nsILoadInfo* aLoadInfo,
99 nsIChannel** aResult) {
100 NS_ENSURE_ARG_POINTER(aURI);
101 NS_ENSURE_ARG_POINTER(aLoadInfo);
102 NS_ASSERTION(aResult, "must not be null");
103
104 nsAutoCString path;
105 nsresult rv = NS_GetAboutModuleName(aURI, path);
106 NS_ENSURE_SUCCESS(rv, rv);
107
108 nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
109 NS_ENSURE_SUCCESS(rv, rv);
110
111 for (int i = 0; i < kRedirTotal; i++) {
112 if (!strcmp(path.get(), kRedirMap[i].id)) {
113 nsCOMPtr<nsIChannel> tempChannel;
114 nsCOMPtr<nsIURI> tempURI;
115 rv = NS_NewURI(getter_AddRefs(tempURI), kRedirMap[i].url);
116 NS_ENSURE_SUCCESS(rv, rv);
117
118 rv = NS_NewChannelInternal(getter_AddRefs(tempChannel), tempURI,
119 aLoadInfo);
120 NS_ENSURE_SUCCESS(rv, rv);
121
122 // If tempURI links to an external URI (i.e. something other than
123 // chrome:// or resource://) then set result principal URI on the
124 // load info which forces the channel principal to reflect the displayed
125 // URL rather then being the systemPrincipal.
126 bool isUIResource = false;
127 rv = NS_URIChainHasFlags(tempURI, nsIProtocolHandler::URI_IS_UI_RESOURCE,
128 &isUIResource);
129 NS_ENSURE_SUCCESS(rv, rv);
130
131 bool isAboutBlank = NS_IsAboutBlank(tempURI);
132
133 if (!isUIResource && !isAboutBlank) {
134 aLoadInfo->SetResultPrincipalURI(tempURI);
135 }
136
137 tempChannel->SetOriginalURI(aURI);
138
139 tempChannel.forget(aResult);
140 return rv;
141 }
142 }
143
144 NS_ERROR("nsAboutRedirector called for unknown case");
145 return NS_ERROR_ILLEGAL_VALUE;
146 }
147
148 NS_IMETHODIMP
GetURIFlags(nsIURI * aURI,uint32_t * aResult)149 nsAboutRedirector::GetURIFlags(nsIURI* aURI, uint32_t* aResult) {
150 NS_ENSURE_ARG_POINTER(aURI);
151
152 nsAutoCString name;
153 nsresult rv = NS_GetAboutModuleName(aURI, name);
154 NS_ENSURE_SUCCESS(rv, rv);
155
156 for (int i = 0; i < kRedirTotal; i++) {
157 if (name.EqualsASCII(kRedirMap[i].id)) {
158 *aResult = kRedirMap[i].flags;
159 return NS_OK;
160 }
161 }
162
163 NS_ERROR("nsAboutRedirector called for unknown case");
164 return NS_ERROR_ILLEGAL_VALUE;
165 }
166
Create(nsISupports * aOuter,REFNSIID aIID,void ** aResult)167 nsresult nsAboutRedirector::Create(nsISupports* aOuter, REFNSIID aIID,
168 void** aResult) {
169 RefPtr<nsAboutRedirector> about = new nsAboutRedirector();
170 return about->QueryInterface(aIID, aResult);
171 }
172