The Tor Browser: extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifdef MOZ_LOGGING

     7 // sorry, this has to be before the pre-compiled header

     8 #define FORCE_PR_LOG /* Allow logging in the release build */

     9 #endif

    10 #include "jsapi.h"

    11 #include "nsIXPCSecurityManager.h"

    12 #include "nsIXPConnect.h"

    13 #include "nsIJSRuntimeService.h"

    14 #include "nsCOMPtr.h"

    15 #include "nsIServiceManager.h"

    16 #include "nsIComponentManager.h"

    17 #include "nsString.h"

    18 #include "nsIPrefService.h"

    19 #include "nspr.h"

    20 #include "mozilla/Attributes.h"

    21 #include "mozilla/Maybe.h"

    22 #include "nsContentUtils.h"

    23 #include "nsCxPusher.h"

    24 #include "nsIScriptSecurityManager.h"

    25 #include "nsJSPrincipals.h"

    26 #include "jswrapper.h"

    28 extern PRLogModuleInfo *MCD;

    29 using mozilla::AutoSafeJSContext;

    31 //*****************************************************************************

    33 static mozilla::Maybe<JS::PersistentRooted<JSObject *> > autoconfigSb;

    35 nsresult CentralizedAdminPrefManagerInit()

    36 {

    37     nsresult rv;

    39     // If the sandbox is already created, no need to create it again.

    40     if (!autoconfigSb.empty())

    41         return NS_OK;

    43     // Grab XPConnect.

    44     nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);

    45     if (NS_FAILED(rv)) {

    46         return rv;

    47     }

    49     // Grab the system principal.

    50     nsCOMPtr<nsIPrincipal> principal;

    51     nsContentUtils::GetSecurityManager()->GetSystemPrincipal(getter_AddRefs(principal));

    54     // Create a sandbox.

    55     AutoSafeJSContext cx;

    56     nsCOMPtr<nsIXPConnectJSObjectHolder> sandbox;

    57     rv = xpc->CreateSandbox(cx, principal, getter_AddRefs(sandbox));

    58     NS_ENSURE_SUCCESS(rv, rv);

    60     // Unwrap, store and root the sandbox.

    61     NS_ENSURE_STATE(sandbox->GetJSObject());

    62     autoconfigSb.construct(cx, js::UncheckedUnwrap(sandbox->GetJSObject()));

    64     return NS_OK;

    65 }

    67 nsresult CentralizedAdminPrefManagerFinish()

    68 {

    69     if (!autoconfigSb.empty()) {

    70         AutoSafeJSContext cx;

    71         autoconfigSb.destroy();

    72         JS_MaybeGC(cx);

    73     }

    74     return NS_OK;

    75 }

    77 nsresult EvaluateAdminConfigScript(const char *js_buffer, size_t length,

    78                                    const char *filename, bool bGlobalContext,

    79                                    bool bCallbacks, bool skipFirstLine)

    80 {

    81     nsresult rv = NS_OK;

    83     if (skipFirstLine) {

    84         /* In order to protect the privacy of the JavaScript preferences file

    85          * from loading by the browser, we make the first line unparseable

    86          * by JavaScript. We must skip that line here before executing

    87          * the JavaScript code.

    88          */

    89         unsigned int i = 0;

    90         while (i < length) {

    91             char c = js_buffer[i++];

    92             if (c == '\r') {

    93                 if (js_buffer[i] == '\n')

    94                     i++;

    95                 break;

    96             }

    97             if (c == '\n')

    98                 break;

    99         }

   101         length -= i;

   102         js_buffer += i;

   103     }

   105     // Grab XPConnect.

   106     nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);

   107     if (NS_FAILED(rv)) {

   108         return rv;

   109     }

   111     AutoSafeJSContext cx;

   112     JSAutoCompartment ac(cx, autoconfigSb.ref());

   114     nsAutoCString script(js_buffer, length);

   115     JS::RootedValue v(cx);

   116     rv = xpc->EvalInSandboxObject(NS_ConvertASCIItoUTF16(script), filename, cx, autoconfigSb.ref(),

   117                                   /* returnStringOnly = */ false, &v);

   118     NS_ENSURE_SUCCESS(rv, rv);

   120     return NS_OK;

   121 }

The Tor Browser / file revision