LCOV - code coverage report
Current view: top level - extensions/pref/autoconfig/src - nsJSConfigTriggers.cpp (source / functions) Hit Total Coverage
Test: output.info Lines: 1 61 1.6 %
Date: 2017-07-14 16:53:18 Functions: 0 3 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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/. */
       5             : 
       6             : #include "jsapi.h"
       7             : #include "nsIXPConnect.h"
       8             : #include "nsCOMPtr.h"
       9             : #include "nsIServiceManager.h"
      10             : #include "nsIComponentManager.h"
      11             : #include "nsString.h"
      12             : #include "nsIPrefService.h"
      13             : #include "nspr.h"
      14             : #include "mozilla/Attributes.h"
      15             : #include "mozilla/Maybe.h"
      16             : #include "nsContentUtils.h"
      17             : #include "nsIScriptSecurityManager.h"
      18             : #include "nsJSPrincipals.h"
      19             : #include "nsIScriptError.h"
      20             : #include "jswrapper.h"
      21             : 
      22             : extern mozilla::LazyLogModule MCD;
      23             : using mozilla::AutoSafeJSContext;
      24             : using mozilla::dom::AutoJSAPI;
      25             : 
      26             : //*****************************************************************************
      27             : 
      28           3 : static JS::PersistentRooted<JSObject *> autoconfigSb;
      29             : 
      30           0 : nsresult CentralizedAdminPrefManagerInit()
      31             : {
      32             :     nsresult rv;
      33             : 
      34             :     // If the sandbox is already created, no need to create it again.
      35           0 :     if (autoconfigSb.initialized())
      36           0 :         return NS_OK;
      37             : 
      38             :     // Grab XPConnect.
      39           0 :     nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);
      40           0 :     if (NS_FAILED(rv)) {
      41           0 :         return rv;
      42             :     }
      43             : 
      44             :     // Grab the system principal.
      45           0 :     nsCOMPtr<nsIPrincipal> principal;
      46           0 :     nsContentUtils::GetSecurityManager()->GetSystemPrincipal(getter_AddRefs(principal));
      47             : 
      48             : 
      49             :     // Create a sandbox.
      50           0 :     AutoSafeJSContext cx;
      51           0 :     JS::Rooted<JSObject*> sandbox(cx);
      52           0 :     rv = xpc->CreateSandbox(cx, principal, sandbox.address());
      53           0 :     NS_ENSURE_SUCCESS(rv, rv);
      54             : 
      55             :     // Unwrap, store and root the sandbox.
      56           0 :     NS_ENSURE_STATE(sandbox);
      57           0 :     autoconfigSb.init(cx, js::UncheckedUnwrap(sandbox));
      58             : 
      59           0 :     return NS_OK;
      60             : }
      61             : 
      62           0 : nsresult CentralizedAdminPrefManagerFinish()
      63             : {
      64           0 :     if (autoconfigSb.initialized()) {
      65           0 :         AutoSafeJSContext cx;
      66           0 :         autoconfigSb.reset();
      67           0 :         JS_MaybeGC(cx);
      68             :     }
      69           0 :     return NS_OK;
      70             : }
      71             : 
      72           0 : nsresult EvaluateAdminConfigScript(const char *js_buffer, size_t length,
      73             :                                    const char *filename, bool bGlobalContext,
      74             :                                    bool bCallbacks, bool skipFirstLine)
      75             : {
      76           0 :     nsresult rv = NS_OK;
      77             : 
      78           0 :     if (skipFirstLine) {
      79             :         /* In order to protect the privacy of the JavaScript preferences file
      80             :          * from loading by the browser, we make the first line unparseable
      81             :          * by JavaScript. We must skip that line here before executing
      82             :          * the JavaScript code.
      83             :          */
      84           0 :         unsigned int i = 0;
      85           0 :         while (i < length) {
      86           0 :             char c = js_buffer[i++];
      87           0 :             if (c == '\r') {
      88           0 :                 if (js_buffer[i] == '\n')
      89           0 :                     i++;
      90           0 :                 break;
      91             :             }
      92           0 :             if (c == '\n')
      93           0 :                 break;
      94             :         }
      95             : 
      96           0 :         length -= i;
      97           0 :         js_buffer += i;
      98             :     }
      99             : 
     100             :     // Grab XPConnect.
     101           0 :     nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);
     102           0 :     if (NS_FAILED(rv)) {
     103           0 :         return rv;
     104             :     }
     105             : 
     106           0 :     AutoJSAPI jsapi;
     107           0 :     if (!jsapi.Init(autoconfigSb)) {
     108           0 :         return NS_ERROR_UNEXPECTED;
     109             :     }
     110           0 :     JSContext* cx = jsapi.cx();
     111             : 
     112           0 :     nsAutoCString script(js_buffer, length);
     113           0 :     JS::RootedValue v(cx);
     114             : 
     115           0 :     nsString convertedScript;
     116           0 :     bool isUTF8 = IsUTF8(script);
     117           0 :     if (isUTF8) {
     118           0 :         convertedScript = NS_ConvertUTF8toUTF16(script);
     119             :     } else {
     120           0 :         nsContentUtils::ReportToConsoleNonLocalized(
     121           0 :             NS_LITERAL_STRING("Your AutoConfig file is ASCII. Please convert it to UTF-8."),
     122             :             nsIScriptError::warningFlag,
     123           0 :             NS_LITERAL_CSTRING("autoconfig"),
     124           0 :             nullptr);
     125             :         /* If the length is 0, the conversion failed. Fallback to ASCII */
     126           0 :         convertedScript = NS_ConvertASCIItoUTF16(script);
     127             :     }
     128           0 :     JS::Rooted<JS::Value> value(cx, JS::BooleanValue(isUTF8));
     129           0 :     if (!JS_DefineProperty(cx, autoconfigSb, "gIsUTF8", value, JSPROP_ENUMERATE)) {
     130           0 :         return NS_ERROR_UNEXPECTED;
     131             :     }
     132           0 :     rv = xpc->EvalInSandboxObject(convertedScript, filename, cx,
     133           0 :                                   autoconfigSb, &v);
     134           0 :     NS_ENSURE_SUCCESS(rv, rv);
     135             : 
     136           0 :     return NS_OK;
     137             : }
     138             : 

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