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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "Registry.h"
#include <windows.h>
#include <shlwapi.h>
#include "common.h"
#include "EventLog.h"
#include "UtfConvert.h"
#include "mozilla/Buffer.h"
#include "mozilla/Try.h"
namespace mozilla::default_agent {
using WStringResult = mozilla::WindowsErrorResult<std::wstring>;
static WStringResult MaybePrefixRegistryValueName(
IsPrefixed isPrefixed, const wchar_t* registryValueNameSuffix) {
if (isPrefixed == IsPrefixed::Unprefixed) {
std::wstring registryValueName = registryValueNameSuffix;
return registryValueName;
}
mozilla::UniquePtr<wchar_t[]> installPath = mozilla::GetFullBinaryPath();
if (!PathRemoveFileSpecW(installPath.get())) {
HRESULT hr = HRESULT_FROM_WIN32(ERROR_BAD_PATHNAME);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
std::wstring registryValueName(installPath.get());
registryValueName.append(L"|");
registryValueName.append(registryValueNameSuffix);
return registryValueName;
}
// Creates a sub key of AGENT_REGKEY_NAME by appending the passed subKey. If
// subKey is null, nothing is appended.
static std::wstring MakeKeyName(const wchar_t* subKey) {
std::wstring keyName = AGENT_REGKEY_NAME;
if (subKey) {
keyName += L"\\";
keyName += subKey;
}
return keyName;
}
MaybeStringResult RegistryGetValueString(
IsPrefixed isPrefixed, const wchar_t* registryValueName,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Get the string size
DWORD wideDataSize = 0;
LSTATUS ls =
RegGetValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
RRF_RT_REG_SZ, nullptr, nullptr, &wideDataSize);
if (ls == ERROR_FILE_NOT_FOUND) {
return mozilla::Maybe<std::string>(mozilla::Nothing());
} else if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
// Convert bytes to characters. The extra character should be unnecessary, but
// addresses the possible rounding problem inherent with integer division.
DWORD charCount = (wideDataSize / sizeof(wchar_t)) + 1;
// Read the data from the registry into a wide string
mozilla::Buffer<wchar_t> wideData(charCount);
ls = RegGetValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
RRF_RT_REG_SZ, nullptr, wideData.Elements(), &wideDataSize);
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
// Convert to narrow string and return.
std::string narrowData;
MOZ_TRY_VAR(narrowData, Utf16ToUtf8(wideData.Elements()));
return mozilla::Some(narrowData);
}
VoidResult RegistrySetValueString(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
const char* newValue,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Convert the value from a narrow string to a wide string
std::wstring wideValue;
MOZ_TRY_VAR(wideValue, Utf8ToUtf16(newValue));
// Store the value
LSTATUS ls = RegSetKeyValueW(HKEY_CURRENT_USER, keyName.c_str(),
valueName.c_str(), REG_SZ, wideValue.c_str(),
(wideValue.size() + 1) * sizeof(wchar_t));
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Ok();
}
MaybeBoolResult RegistryGetValueBool(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Read the integer value from the registry
DWORD value;
DWORD valueSize = sizeof(DWORD);
LSTATUS ls =
RegGetValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
RRF_RT_REG_DWORD, nullptr, &value, &valueSize);
if (ls == ERROR_FILE_NOT_FOUND) {
return mozilla::Maybe<bool>(mozilla::Nothing());
}
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Some(value != 0);
}
VoidResult RegistrySetValueBool(IsPrefixed isPrefixed,
const wchar_t* registryValueName, bool newValue,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Write the value to the registry
DWORD value = newValue ? 1 : 0;
LSTATUS ls =
RegSetKeyValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
REG_DWORD, &value, sizeof(DWORD));
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Ok();
}
MaybeQwordResult RegistryGetValueQword(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Read the integer value from the registry
ULONGLONG value;
DWORD valueSize = sizeof(ULONGLONG);
LSTATUS ls =
RegGetValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
RRF_RT_REG_QWORD, nullptr, &value, &valueSize);
if (ls == ERROR_FILE_NOT_FOUND) {
return mozilla::Maybe<ULONGLONG>(mozilla::Nothing());
}
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Some(value);
}
VoidResult RegistrySetValueQword(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
ULONGLONG newValue,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Write the value to the registry
LSTATUS ls =
RegSetKeyValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
REG_QWORD, &newValue, sizeof(ULONGLONG));
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Ok();
}
MaybeDwordResult RegistryGetValueDword(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Read the integer value from the registry
uint32_t value;
DWORD valueSize = sizeof(uint32_t);
LSTATUS ls =
RegGetValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
RRF_RT_DWORD, nullptr, &value, &valueSize);
if (ls == ERROR_FILE_NOT_FOUND) {
return mozilla::Maybe<uint32_t>(mozilla::Nothing());
}
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Some(value);
}
VoidResult RegistrySetValueDword(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
uint32_t newValue,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
// Write the value to the registry
LSTATUS ls =
RegSetKeyValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str(),
REG_DWORD, &newValue, sizeof(uint32_t));
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Ok();
}
VoidResult RegistryDeleteValue(IsPrefixed isPrefixed,
const wchar_t* registryValueName,
const wchar_t* subKey /* = nullptr */) {
// Get the full registry value name
WStringResult registryValueNameResult =
MaybePrefixRegistryValueName(isPrefixed, registryValueName);
if (registryValueNameResult.isErr()) {
return mozilla::Err(registryValueNameResult.unwrapErr());
}
std::wstring valueName = registryValueNameResult.unwrap();
std::wstring keyName = MakeKeyName(subKey);
LSTATUS ls =
RegDeleteKeyValueW(HKEY_CURRENT_USER, keyName.c_str(), valueName.c_str());
if (ls != ERROR_SUCCESS) {
HRESULT hr = HRESULT_FROM_WIN32(ls);
LOG_ERROR(hr);
return mozilla::Err(mozilla::WindowsError::FromHResult(hr));
}
return mozilla::Ok();
}
} // namespace mozilla::default_agent
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