From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- .../pref/autoconfig/src/nsJSConfigTriggers.cpp | 170 +++++++++++++++++++++ 1 file changed, 170 insertions(+) create mode 100644 extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp (limited to 'extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp') diff --git a/extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp b/extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp new file mode 100644 index 0000000000..e0b4324f40 --- /dev/null +++ b/extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp @@ -0,0 +1,170 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "nsJSConfigTriggers.h" + +#include "jsapi.h" +#include "nsIXPConnect.h" +#include "nsCOMPtr.h" +#include "nsString.h" +#include "nspr.h" +#include "mozilla/Attributes.h" +#include "mozilla/Maybe.h" +#include "mozilla/NullPrincipal.h" +#include "mozilla/dom/ScriptSettings.h" +#include "mozilla/dom/ChromeUtilsBinding.h" +#include "nsContentUtils.h" +#include "nsJSPrincipals.h" +#include "nsIScriptError.h" +#include "js/PropertyAndElement.h" // JS_DefineProperty +#include "js/Wrapper.h" +#include "mozilla/Utf8.h" + +extern mozilla::LazyLogModule MCD; +using mozilla::AutoSafeJSContext; +using mozilla::IsUtf8; +using mozilla::NullPrincipal; +using mozilla::dom::AutoJSAPI; + +//***************************************************************************** + +static JS::PersistentRooted autoconfigSystemSb; +static JS::PersistentRooted autoconfigSb; +bool sandboxEnabled; + +nsresult CentralizedAdminPrefManagerInit(bool aSandboxEnabled) { + // If the sandbox is already created, no need to create it again. + if (autoconfigSb.initialized()) return NS_OK; + + sandboxEnabled = aSandboxEnabled; + + // Grab XPConnect. + nsCOMPtr xpc = nsIXPConnect::XPConnect(); + + // Grab the system principal. + nsCOMPtr principal; + nsContentUtils::GetSecurityManager()->GetSystemPrincipal( + getter_AddRefs(principal)); + + // Create a sandbox. + AutoSafeJSContext cx; + JS::Rooted sandbox(cx); + nsresult rv = xpc->CreateSandbox(cx, principal, sandbox.address()); + NS_ENSURE_SUCCESS(rv, rv); + + // Unwrap, store and root the sandbox. + NS_ENSURE_STATE(sandbox); + autoconfigSystemSb.init(cx, js::UncheckedUnwrap(sandbox)); + + // Create an unprivileged sandbox. + principal = NullPrincipal::CreateWithoutOriginAttributes(); + rv = xpc->CreateSandbox(cx, principal, sandbox.address()); + NS_ENSURE_SUCCESS(rv, rv); + + autoconfigSb.init(cx, js::UncheckedUnwrap(sandbox)); + + // Define gSandbox on system sandbox. + JSAutoRealm ar(cx, autoconfigSystemSb); + + JS::Rooted value(cx, JS::ObjectValue(*sandbox)); + + if (!JS_WrapValue(cx, &value) || + !JS_DefineProperty(cx, autoconfigSystemSb, "gSandbox", value, + JSPROP_ENUMERATE)) { + return NS_ERROR_FAILURE; + } + + // Define ChromeUtils for ChromeUtils.import. + if (!mozilla::dom::ChromeUtils_Binding::GetConstructorObject(cx)) { + return NS_ERROR_FAILURE; + } + + return NS_OK; +} + +nsresult CentralizedAdminPrefManagerFinish() { + if (autoconfigSb.initialized()) { + AutoSafeJSContext cx; + autoconfigSb.reset(); + autoconfigSystemSb.reset(); + JS_MaybeGC(cx); + } + return NS_OK; +} + +nsresult EvaluateAdminConfigScript(const char* js_buffer, size_t length, + const char* filename, bool globalContext, + bool callbacks, bool skipFirstLine, + bool isPrivileged) { + if (!sandboxEnabled) { + isPrivileged = true; + } + return EvaluateAdminConfigScript( + isPrivileged ? autoconfigSystemSb : autoconfigSb, js_buffer, length, + filename, globalContext, callbacks, skipFirstLine); +} + +nsresult EvaluateAdminConfigScript(JS::Handle sandbox, + const char* js_buffer, size_t length, + const char* filename, bool globalContext, + bool callbacks, bool skipFirstLine) { + if (skipFirstLine) { + /* In order to protect the privacy of the JavaScript preferences file + * from loading by the browser, we make the first line unparseable + * by JavaScript. We must skip that line here before executing + * the JavaScript code. + */ + unsigned int i = 0; + while (i < length) { + char c = js_buffer[i++]; + if (c == '\r') { + if (js_buffer[i] == '\n') i++; + break; + } + if (c == '\n') break; + } + + length -= i; + js_buffer += i; + } + + // Grab XPConnect. + nsCOMPtr xpc = nsIXPConnect::XPConnect(); + + AutoJSAPI jsapi; + if (!jsapi.Init(sandbox)) { + return NS_ERROR_UNEXPECTED; + } + JSContext* cx = jsapi.cx(); + + nsAutoCString script(js_buffer, length); + JS::Rooted v(cx); + + nsString convertedScript; + bool isUTF8 = IsUtf8(script); + if (isUTF8) { + CopyUTF8toUTF16(script, convertedScript); + } else { + nsContentUtils::ReportToConsoleNonLocalized( + nsLiteralString( + u"Your AutoConfig file is ASCII. Please convert it to UTF-8."), + nsIScriptError::warningFlag, "autoconfig"_ns, nullptr); + /* If the length is 0, the conversion failed. Fallback to ASCII */ + convertedScript = NS_ConvertASCIItoUTF16(script); + } + { + JSAutoRealm ar(cx, autoconfigSystemSb); + JS::Rooted value(cx, JS::BooleanValue(isUTF8)); + if (!JS_DefineProperty(cx, autoconfigSystemSb, "gIsUTF8", value, + JSPROP_ENUMERATE)) { + return NS_ERROR_UNEXPECTED; + } + } + nsresult rv = + xpc->EvalInSandboxObject(convertedScript, filename, cx, sandbox, &v); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} -- cgit v1.2.3