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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/utility/importer/nss_decryptor_win.h"
#include <windows.h>
#include "base/files/file_path.h"
#include "base/strings/sys_string_conversions.h"
namespace {
// A helper class whose destructor calls SetDllDirectory(nullptr) to undo the
// effects of a previous SetDllDirectory call.
class ScopedSetDllDirectoryCaller {
public:
ScopedSetDllDirectoryCaller() = default;
~ScopedSetDllDirectoryCaller() { ::SetDllDirectory(nullptr); }
};
} // namespace
// static
const wchar_t NSSDecryptor::kNSS3Library[] = L"nss3.dll";
const wchar_t NSSDecryptor::kPLDS4Library[] = L"plds4.dll";
const wchar_t NSSDecryptor::kNSPR4Library[] = L"nspr4.dll";
bool NSSDecryptor::Init(const base::FilePath& dll_path,
const base::FilePath& db_path) {
// We call SetDllDirectory to work around a Purify bug (GetModuleHandle
// fails inside Purify under certain conditions).
if (!::SetDllDirectory(dll_path.value().c_str())) {
return false;
}
ScopedSetDllDirectoryCaller caller;
nss3_dll_ = ::LoadLibrary(kNSS3Library);
if (!nss3_dll_) {
return false;
}
HMODULE plds4_dll = ::GetModuleHandle(kPLDS4Library);
HMODULE nspr4_dll = ::GetModuleHandle(kNSPR4Library);
// On Firefox 22 and higher, NSPR is part of nss3.dll rather than separate
// DLLs.
if (!plds4_dll) {
plds4_dll = nss3_dll_;
nspr4_dll = nss3_dll_;
}
return InitNSS(db_path, plds4_dll, nspr4_dll);
}
NSSDecryptor::NSSDecryptor()
: NSS_Init(NULL),
NSS_Shutdown(NULL),
PK11_GetInternalKeySlot(NULL),
PK11_FreeSlot(NULL),
PK11_Authenticate(NULL),
PK11SDR_Decrypt(NULL),
SECITEM_FreeItem(NULL),
PL_ArenaFinish(NULL),
PR_Cleanup(NULL),
nss3_dll_(NULL),
softokn3_dll_(NULL),
is_nss_initialized_(false) {}
NSSDecryptor::~NSSDecryptor() {
Free();
}
bool NSSDecryptor::InitNSS(const base::FilePath& db_path,
base::NativeLibrary plds4_dll,
base::NativeLibrary nspr4_dll) {
// Gets the function address.
NSS_Init = (NSSInitFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "NSS_Init");
NSS_Shutdown = (NSSShutdownFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "NSS_Shutdown");
PK11_GetInternalKeySlot = (PK11GetInternalKeySlotFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_,
"PK11_GetInternalKeySlot");
PK11_FreeSlot = (PK11FreeSlotFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "PK11_FreeSlot");
PK11_Authenticate = (PK11AuthenticateFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "PK11_Authenticate");
PK11SDR_Decrypt = (PK11SDRDecryptFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "PK11SDR_Decrypt");
SECITEM_FreeItem = (SECITEMFreeItemFunc)
base::GetFunctionPointerFromNativeLibrary(nss3_dll_, "SECITEM_FreeItem");
PL_ArenaFinish = (PLArenaFinishFunc)
base::GetFunctionPointerFromNativeLibrary(plds4_dll, "PL_ArenaFinish");
PR_Cleanup = (PRCleanupFunc)
base::GetFunctionPointerFromNativeLibrary(nspr4_dll, "PR_Cleanup");
if (NSS_Init == NULL || NSS_Shutdown == NULL ||
PK11_GetInternalKeySlot == NULL || PK11_FreeSlot == NULL ||
PK11_Authenticate == NULL || PK11SDR_Decrypt == NULL ||
SECITEM_FreeItem == NULL || PL_ArenaFinish == NULL ||
PR_Cleanup == NULL) {
Free();
return false;
}
SECStatus result = NSS_Init(base::SysWideToNativeMB(db_path.value()).c_str());
if (result != SECSuccess) {
Free();
return false;
}
is_nss_initialized_ = true;
return true;
}
void NSSDecryptor::Free() {
if (is_nss_initialized_) {
NSS_Shutdown();
PL_ArenaFinish();
PR_Cleanup();
is_nss_initialized_ = false;
}
if (softokn3_dll_ != NULL)
base::UnloadNativeLibrary(softokn3_dll_);
if (nss3_dll_ != NULL)
base::UnloadNativeLibrary(nss3_dll_);
NSS_Init = NULL;
NSS_Shutdown = NULL;
PK11_GetInternalKeySlot = NULL;
PK11_FreeSlot = NULL;
PK11_Authenticate = NULL;
PK11SDR_Decrypt = NULL;
SECITEM_FreeItem = NULL;
PL_ArenaFinish = NULL;
PR_Cleanup = NULL;
nss3_dll_ = NULL;
softokn3_dll_ = NULL;
}
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