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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "LibrarySandboxPreload.h"
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#include "BinaryPath.h"
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#include "prlink.h"
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namespace mozilla {
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namespace ipc {
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static nsAutoCString GetSandboxedPath(const nsACString& libName) {
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nsCOMPtr<nsIFile> binaryPath;
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nsresult rv = mozilla::BinaryPath::GetFile(getter_AddRefs(binaryPath));
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if (NS_FAILED(rv)) {
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MOZ_CRASH("Library preload failure: Failed to get binary file\n");
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}
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nsCOMPtr<nsIFile> libFile;
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rv = binaryPath->GetParent(getter_AddRefs(libFile));
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if (NS_FAILED(rv)) {
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MOZ_CRASH("Library preload failure: Failed to get binary folder\n");
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}
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rv = libFile->AppendNative(libName);
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if (NS_FAILED(rv)) {
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MOZ_CRASH("Library preload failure: Failed to get library file\n");
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}
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nsAutoString fullPath;
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rv = libFile->GetPath(fullPath);
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if (NS_FAILED(rv)) {
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MOZ_CRASH("Library preload failure: Failed to get library path\n");
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}
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nsAutoCString converted_path = NS_ConvertUTF16toUTF8(fullPath);
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return converted_path;
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}
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nsAutoCString GetSandboxedRLBoxPath() {
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return GetSandboxedPath(
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nsLiteralCString(MOZ_DLL_PREFIX "rlbox" MOZ_DLL_SUFFIX));
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}
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PRLibrary* PreloadLibrary(const nsAutoCString& path) {
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PRLibSpec libSpec;
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libSpec.type = PR_LibSpec_Pathname;
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libSpec.value.pathname = path.get();
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PRLibrary* ret = PR_LoadLibraryWithFlags(libSpec, PR_LD_LAZY);
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return ret;
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}
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void PreloadSandboxedDynamicLibrary() {
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// The process level sandbox does not allow loading of dynamic libraries.
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// This preloads wasm sandboxed libraries before the process level sandbox is
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// enabled. Currently, this is only needed for Linux as Mac allows loading
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// libraries from the package file.
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#if defined(XP_LINUX) && defined(MOZ_USING_WASM_SANDBOXING)
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if (!PreloadLibrary(GetSandboxedRLBoxPath())) {
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MOZ_CRASH("Library preload failure: Failed to load librlbox\n");
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}
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#endif
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}
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} // namespace ipc
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} // namespace mozilla
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