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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "LibrarySandboxPreload.h"
#include "BinaryPath.h"
#include "prlink.h"
namespace mozilla {
namespace ipc {
static nsAutoCString GetSandboxedPath(const nsACString& libName) {
nsCOMPtr<nsIFile> binaryPath;
nsresult rv = mozilla::BinaryPath::GetFile(getter_AddRefs(binaryPath));
if (NS_FAILED(rv)) {
MOZ_CRASH("Library preload failure: Failed to get binary file\n");
}
nsCOMPtr<nsIFile> libFile;
rv = binaryPath->GetParent(getter_AddRefs(libFile));
if (NS_FAILED(rv)) {
MOZ_CRASH("Library preload failure: Failed to get binary folder\n");
}
rv = libFile->AppendNative(libName);
if (NS_FAILED(rv)) {
MOZ_CRASH("Library preload failure: Failed to get library file\n");
}
nsAutoString fullPath;
rv = libFile->GetPath(fullPath);
if (NS_FAILED(rv)) {
MOZ_CRASH("Library preload failure: Failed to get library path\n");
}
nsAutoCString converted_path = NS_ConvertUTF16toUTF8(fullPath);
return converted_path;
}
nsAutoCString GetSandboxedGraphitePath() {
return GetSandboxedPath(
nsLiteralCString(MOZ_DLL_PREFIX "graphitewasm" MOZ_DLL_SUFFIX));
}
nsAutoCString GetSandboxedOggPath() {
return GetSandboxedPath(
nsLiteralCString(MOZ_DLL_PREFIX "oggwasm" MOZ_DLL_SUFFIX));
}
PRLibrary* PreloadLibrary(const nsAutoCString& path) {
PRLibSpec libSpec;
libSpec.type = PR_LibSpec_Pathname;
libSpec.value.pathname = path.get();
PRLibrary* ret = PR_LoadLibraryWithFlags(libSpec, PR_LD_LAZY);
return ret;
}
void PreloadSandboxedDynamicLibraries() {
// The process level sandbox does not allow loading of dynamic libraries.
// This preloads wasm sandboxed libraries before the process level sandbox is
// enabled. Currently, this is only needed for Linux as Mac allows loading
// libraries from the package file.
#if defined(XP_LINUX)
# if defined(MOZ_WASM_SANDBOXING_GRAPHITE)
if (!PreloadLibrary(GetSandboxedGraphitePath())) {
MOZ_CRASH("Library preload failure: Failed to load libgraphite\n");
}
# endif
# if defined(MOZ_WASM_SANDBOXING_OGG)
if (!PreloadLibrary(GetSandboxedOggPath())) {
MOZ_CRASH("Library preload failure: Failed to load libogg\n");
}
# endif
#endif
}
} // namespace ipc
} // namespace mozilla
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