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/*
Copyright (C) 2010 Mataes
This is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this file; see the file license.txt. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "stdafx.h"
HNETLIBUSER hNetlibUser = nullptr;
HANDLE hPipe = nullptr;
/////////////////////////////////////////////////////////////////////////////////////
void LoadOptions()
{
g_plugin.PopupDefColors = g_plugin.getByte("DefColors", DEFAULT_COLORS);
g_plugin.PopupLeftClickAction= g_plugin.getByte("LeftClickAction", DEFAULT_POPUP_LCLICK);
g_plugin.PopupRightClickAction = g_plugin.getByte("RightClickAction", DEFAULT_POPUP_RCLICK);
g_plugin.PopupTimeout = g_plugin.getDword("Timeout", DEFAULT_TIMEOUT_VALUE);
g_plugin.bUpdateOnStartup = g_plugin.getBool("UpdateOnStartup", true);
g_plugin.bOnlyOnceADay = g_plugin.getBool("OnlyOnceADay", true);
g_plugin.bUpdateOnPeriod = g_plugin.getBool("UpdateOnPeriod", false);
g_plugin.bSilentMode = g_plugin.getBool("SilentMode", false);
g_plugin.bUseHttps = g_plugin.getBool("UseHttps", IsWinVerVistaPlus());
g_plugin.bBackup = g_plugin.getBool("Backup", false);
g_plugin.bChangePlatform = g_plugin.getBool(DB_SETTING_CHANGEPLATFORM, false);
g_plugin.iPeriod = g_plugin.getDword("Period", 1);
g_plugin.iPeriodMeasure = g_plugin.getByte("PeriodMeasure", 1);
}
IconItem iconList[] =
{
{ LPGEN("Check for updates"),"check_update", IDI_MENU },
{ LPGEN("Plugin info"), "info", IDI_INFO },
{ LPGEN("Component list"),"plg_list", IDI_PLGLIST }
};
void InitIcoLib()
{
g_plugin.registerIcon(MODULEA, iconList);
}
void InitNetlib()
{
NETLIBUSER nlu = {};
nlu.flags = NUF_OUTGOING | NUF_INCOMING | NUF_HTTPCONNS | NUF_UNICODE;
nlu.szDescriptiveName.w = TranslateT("Plugin Updater HTTP connections");
nlu.szSettingsModule = MODULENAME;
hNetlibUser = Netlib_RegisterUser(&nlu);
}
void UnloadNetlib()
{
Netlib_CloseHandle(hNetlibUser);
hNetlibUser = nullptr;
}
int CompareHashes(const ServListEntry *p1, const ServListEntry *p2)
{
return _wcsicmp(p1->m_name, p2->m_name);
}
bool ParseHashes(const wchar_t *ptszUrl, ptrW &baseUrl, SERVLIST &arHashes)
{
REPLACEVARSARRAY vars[2];
vars[0].key.w = L"platform";
#ifdef _WIN64
vars[0].value.w = L"64";
#else
vars[0].value.w = L"32";
#endif
vars[1].key.w = vars[1].value.w = nullptr;
baseUrl = Utils_ReplaceVarsW(ptszUrl, 0, vars);
// Download version info
FILEURL pFileUrl;
mir_snwprintf(pFileUrl.tszDownloadURL, L"%s/hashes.zip", baseUrl.get());
mir_snwprintf(pFileUrl.tszDiskPath, L"%s\\hashes.zip", g_tszTempPath);
pFileUrl.CRCsum = 0;
HNETLIBCONN nlc = nullptr;
bool ret = DownloadFile(&pFileUrl, nlc);
Netlib_CloseHandle(nlc);
if (!ret) {
Netlib_LogfW(hNetlibUser, L"Downloading list of available updates from %s failed", baseUrl.get());
ShowPopup(TranslateT("Plugin Updater"), TranslateT("An error occurred while checking for new updates."), POPUP_TYPE_ERROR);
Skin_PlaySound("updatefailed");
return false;
}
if (!unzip(pFileUrl.tszDiskPath, g_tszTempPath, nullptr, true)) {
Netlib_LogfW(hNetlibUser, L"Unzipping list of available updates from %s failed", baseUrl.get());
ShowPopup(TranslateT("Plugin Updater"), TranslateT("An error occurred while checking for new updates."), POPUP_TYPE_ERROR);
Skin_PlaySound("updatefailed");
return false;
}
DeleteFile(pFileUrl.tszDiskPath);
wchar_t tszTmpIni[MAX_PATH] = {0};
mir_snwprintf(tszTmpIni, L"%s\\hashes.txt", g_tszTempPath);
FILE *fp = _wfopen(tszTmpIni, L"r");
if (!fp) {
Netlib_LogfW(hNetlibUser,L"Opening %s failed", g_tszTempPath);
ShowPopup(TranslateT("Plugin Updater"), TranslateT("An error occurred while checking for new updates."), POPUP_TYPE_ERROR);
return false;
}
bool bDoNotSwitchToStable = false;
char str[200];
while(fgets(str, _countof(str), fp) != nullptr) {
rtrim(str);
// Do not allow the user to switch back to stable
if (!strcmp(str, "DoNotSwitchToStable")) {
bDoNotSwitchToStable = true;
}
else if (str[0] != ';') { // ';' marks a comment
Netlib_Logf(hNetlibUser, "Update: %s", str);
char *p = strchr(str, ' ');
if (p != nullptr) {
*p++ = 0;
_strlwr(p);
int dwCrc32;
char *p1 = strchr(p, ' ');
if (p1 == nullptr)
dwCrc32 = 0;
else {
*p1++ = 0;
sscanf(p1, "%08x", &dwCrc32);
}
arHashes.insert(new ServListEntry(str, p, dwCrc32));
}
}
}
fclose(fp);
DeleteFile(tszTmpIni);
if (bDoNotSwitchToStable) {
g_plugin.setByte(DB_SETTING_DONT_SWITCH_TO_STABLE, 1);
// Reset setting if needed
int UpdateMode = g_plugin.getByte(DB_SETTING_UPDATE_MODE, UPDATE_MODE_STABLE);
if (UpdateMode == UPDATE_MODE_STABLE)
g_plugin.setByte(DB_SETTING_UPDATE_MODE, UPDATE_MODE_TRUNK);
}
else
g_plugin.setByte(DB_SETTING_DONT_SWITCH_TO_STABLE, 0);
return true;
}
bool DownloadFile(FILEURL *pFileURL, HNETLIBCONN &nlc)
{
char szMirVer[100];
Miranda_GetVersionText(szMirVer, _countof(szMirVer));
if (auto *p = strchr(szMirVer, '('))
*p = 0;
rtrim(szMirVer);
char szOsVer[100];
OS_GetShortString(szOsVer, _countof(szOsVer));
CMStringA szUserAgent("Miranda NG/");
szUserAgent.Append(szMirVer);
szUserAgent.AppendFormat(" (%s", szOsVer);
#ifdef _WIN64
szUserAgent.Append("; Win64; x64");
#endif
szUserAgent.Append(")");
NETLIBHTTPREQUEST nlhr = {};
nlhr.cbSize = sizeof(nlhr);
nlhr.flags = NLHRF_DUMPASTEXT | NLHRF_HTTP11 | NLHRF_PERSISTENT;
nlhr.requestType = REQUEST_GET;
nlhr.nlc = nlc;
char *szUrl = mir_u2a(pFileURL->tszDownloadURL);
nlhr.szUrl = szUrl;
nlhr.headersCount = 4;
nlhr.headers=(NETLIBHTTPHEADER*)mir_alloc(sizeof(NETLIBHTTPHEADER)*nlhr.headersCount);
nlhr.headers[0].szName = "User-Agent";
nlhr.headers[0].szValue = szUserAgent.GetBuffer();
nlhr.headers[1].szName = "Connection";
nlhr.headers[1].szValue = "close";
nlhr.headers[2].szName = "Cache-Control";
nlhr.headers[2].szValue = "no-cache";
nlhr.headers[3].szName = "Pragma";
nlhr.headers[3].szValue = "no-cache";
bool ret = false;
for (int i = 0; !ret && i < MAX_RETRIES; i++) {
Netlib_LogfW(hNetlibUser,L"Downloading file %s to %s (attempt %d)",pFileURL->tszDownloadURL,pFileURL->tszDiskPath, i+1);
NLHR_PTR pReply(Netlib_HttpTransaction(hNetlibUser, &nlhr));
if (pReply) {
nlc = pReply->nlc;
if ((200 == pReply->resultCode) && (pReply->dataLength > 0)) {
// Check CRC sum
if (pFileURL->CRCsum) {
int crc = crc32(0, (unsigned char*)pReply->pData, pReply->dataLength);
if (crc != pFileURL->CRCsum) {
// crc check failed, try again
Netlib_LogfW(hNetlibUser,L"crc check failed for file %s",pFileURL->tszDiskPath);
continue;
}
}
HANDLE hFile = CreateFile(pFileURL->tszDiskPath, GENERIC_READ | GENERIC_WRITE, NULL, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hFile != INVALID_HANDLE_VALUE) {
DWORD dwBytes;
// write the downloaded file directly
WriteFile(hFile, pReply->pData, (DWORD)pReply->dataLength, &dwBytes, nullptr);
CloseHandle(hFile);
}
else {
// try to write it via PU stub
wchar_t tszTempFile[MAX_PATH];
mir_snwprintf(tszTempFile, L"%s\\pulocal.tmp", g_tszTempPath);
hFile = CreateFile(tszTempFile, GENERIC_READ | GENERIC_WRITE, NULL, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hFile != INVALID_HANDLE_VALUE) {
DWORD dwBytes;
WriteFile(hFile, pReply->pData, (DWORD)pReply->dataLength, &dwBytes, nullptr);
CloseHandle(hFile);
SafeMoveFile(tszTempFile, pFileURL->tszDiskPath);
}
}
ret = true;
}
else Netlib_LogfW(hNetlibUser,L"Downloading file %s failed with error %d",pFileURL->tszDownloadURL,pReply->resultCode);
}
else {
Netlib_LogfW(hNetlibUser,L"Downloading file %s failed, host is propably temporary down.",pFileURL->tszDownloadURL);
nlc = nullptr;
}
}
if(!ret)
Netlib_LogfW(hNetlibUser,L"Downloading file %s failed, giving up",pFileURL->tszDownloadURL);
mir_free(szUrl);
mir_free(nlhr.headers);
return ret;
}
void __stdcall OpenPluginOptions(void*)
{
g_plugin.openOptions(nullptr, L"Plugins");
}
// FUNCTION: IsRunAsAdmin()
//
// PURPOSE: The function checks whether the current process is run as
// administrator. In other words, it dictates whether the primary access
// token of the process belongs to user account that is a member of the
// local Administrators group and it is elevated.
//
// RETURN VALUE: Returns TRUE if the primary access token of the process
// belongs to user account that is a member of the local Administrators
// group and it is elevated. Returns FALSE if the token does not.
//
// EXCEPTION: If this function fails, it throws a C++ DWORD exception which
// contains the Win32 error code of the failure.
//
// EXAMPLE CALL:
// try
// {
// if (IsRunAsAdmin())
// wprintf (L"Process is run as administrator\n");
// else
// wprintf (L"Process is not run as administrator\n");
// }
// catch (DWORD dwError)
// {
// wprintf(L"IsRunAsAdmin failed w/err %lu\n", dwError);
// }
//
BOOL IsRunAsAdmin()
{
BOOL fIsRunAsAdmin = FALSE;
DWORD dwError = ERROR_SUCCESS;
PSID pAdministratorsGroup = nullptr;
// Allocate and initialize a SID of the administrators group.
SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
if (!AllocateAndInitializeSid(
&NtAuthority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0,
&pAdministratorsGroup))
{
dwError = GetLastError();
goto Cleanup;
}
// Determine whether the SID of administrators group is bEnabled in
// the primary access token of the process.
if (!CheckTokenMembership(nullptr, pAdministratorsGroup, &fIsRunAsAdmin))
{
dwError = GetLastError();
goto Cleanup;
}
Cleanup:
// Centralized cleanup for all allocated resources.
if (pAdministratorsGroup)
{
FreeSid(pAdministratorsGroup);
pAdministratorsGroup = nullptr;
}
// Throw the error if something failed in the function.
if (ERROR_SUCCESS != dwError)
{
throw dwError;
}
return fIsRunAsAdmin;
}
//
// FUNCTION: IsProcessElevated()
//
// PURPOSE: The function gets the elevation information of the current
// process. It dictates whether the process is elevated or not. Token
// elevation is only available on Windows Vista and newer operating
// systems, thus IsProcessElevated throws a C++ exception if it is called
// on systems prior to Windows Vista. It is not appropriate to use this
// function to determine whether a process is run as administartor.
//
// RETURN VALUE: Returns TRUE if the process is elevated. Returns FALSE if
// it is not.
//
// EXCEPTION: If this function fails, it throws a C++ DWORD exception
// which contains the Win32 error code of the failure. For example, if
// IsProcessElevated is called on systems prior to Windows Vista, the error
// code will be ERROR_INVALID_PARAMETER.
//
// NOTE: TOKEN_INFORMATION_CLASS provides TokenElevationType to check the
// elevation type (TokenElevationTypeDefault / TokenElevationTypeLimited /
// TokenElevationTypeFull) of the process. It is different from
// TokenElevation in that, when UAC is turned off, elevation type always
// returns TokenElevationTypeDefault even though the process is elevated
// (Integrity Level == High). In other words, it is not safe to say if the
// process is elevated based on elevation type. Instead, we should use
// TokenElevation.
//
// EXAMPLE CALL:
// try
// {
// if (IsProcessElevated())
// wprintf (L"Process is elevated\n");
// else
// wprintf (L"Process is not elevated\n");
// }
// catch (DWORD dwError)
// {
// wprintf(L"IsProcessElevated failed w/err %lu\n", dwError);
// }
//
BOOL IsProcessElevated()
{
BOOL fIsElevated = FALSE;
DWORD dwError = ERROR_SUCCESS;
HANDLE hToken = nullptr;
// Open the primary access token of the process with TOKEN_QUERY.
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken))
{
dwError = GetLastError();
goto Cleanup;
}
// Retrieve token elevation information.
TOKEN_ELEVATION elevation;
DWORD dwSize;
if (!GetTokenInformation(hToken, TokenElevation, &elevation, sizeof(elevation), &dwSize))
{
// When the process is run on operating systems prior to Windows
// Vista, GetTokenInformation returns FALSE with the
// ERROR_INVALID_PARAMETER error code because TokenElevation is
// not supported on those operating systems.
dwError = GetLastError();
goto Cleanup;
}
fIsElevated = elevation.TokenIsElevated;
Cleanup:
// Centralized cleanup for all allocated resources.
if (hToken)
{
CloseHandle(hToken);
hToken = nullptr;
}
// Throw the error if something failed in the function.
if (ERROR_SUCCESS != dwError)
{
throw dwError;
}
return fIsElevated;
}
bool PrepareEscalation()
{
// First try to create a file near Miranda32.exe
wchar_t szPath[MAX_PATH];
GetModuleFileName(nullptr, szPath, _countof(szPath));
wchar_t *ext = wcsrchr(szPath, '.');
if (ext != nullptr)
*ext = '\0';
wcscat(szPath, L".test");
HANDLE hFile = CreateFile(szPath, GENERIC_WRITE, FILE_SHARE_READ, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hFile != INVALID_HANDLE_VALUE) {
// we are admins or UAC is disable, cool
CloseHandle(hFile);
DeleteFile(szPath);
return true;
}
else if (IsRunAsAdmin()) {
// Check the current process's "run as administrator" status.
return true;
}
else {
// Elevate the process. Create a pipe for a stub first
wchar_t tszPipeName[MAX_PATH];
mir_snwprintf(tszPipeName, L"\\\\.\\pipe\\Miranda_Pu_%d", GetCurrentProcessId());
hPipe = CreateNamedPipe(tszPipeName, PIPE_ACCESS_DUPLEX, PIPE_READMODE_BYTE | PIPE_WAIT, 1, 1024, 1024, NMPWAIT_USE_DEFAULT_WAIT, nullptr);
if (hPipe == INVALID_HANDLE_VALUE) {
hPipe = nullptr;
}
else {
wchar_t cmdLine[100], *p;
GetModuleFileName(nullptr, szPath, ARRAYSIZE(szPath));
if ((p = wcsrchr(szPath, '\\')) != nullptr)
wcscpy(p+1, L"pu_stub.exe");
mir_snwprintf(cmdLine, L"%d", GetCurrentProcessId());
// Launch a stub
SHELLEXECUTEINFO sei = { sizeof(sei) };
sei.lpVerb = L"runas";
sei.lpFile = szPath;
sei.lpParameters = cmdLine;
sei.hwnd = nullptr;
sei.nShow = SW_NORMAL;
if (ShellExecuteEx(&sei)) {
if (hPipe != nullptr)
ConnectNamedPipe(hPipe, nullptr);
return true;
}
DWORD dwError = GetLastError();
if (dwError == ERROR_CANCELLED)
{
// The user refused to allow privileges elevation.
// Do nothing ...
}
}
return false;
}
}
/////////////////////////////////////////////////////////////////////////////////////////
int TransactPipe(int opcode, const wchar_t *p1, const wchar_t *p2)
{
BYTE buf[1024];
DWORD l1 = lstrlen(p1), l2 = lstrlen(p2);
if (l1 > MAX_PATH || l2 > MAX_PATH)
return 0;
*(DWORD*)buf = opcode;
wchar_t *dst = (wchar_t*)&buf[sizeof(DWORD)];
lstrcpy(dst, p1);
dst += l1+1;
if (p2) {
lstrcpy(dst, p2);
dst += l2+1;
}
else *dst++ = 0;
DWORD dwBytes = 0, dwError;
if ( WriteFile(hPipe, buf, (DWORD)((BYTE*)dst - buf), &dwBytes, nullptr) == 0)
return 0;
dwError = 0;
if ( ReadFile(hPipe, &dwError, sizeof(DWORD), &dwBytes, nullptr) == 0) return 0;
if (dwBytes != sizeof(DWORD)) return 0;
return dwError == ERROR_SUCCESS;
}
int SafeCopyFile(const wchar_t *pSrc, const wchar_t *pDst)
{
if (hPipe == nullptr)
return CopyFile(pSrc, pDst, FALSE);
return TransactPipe(1, pSrc, pDst);
}
int SafeMoveFile(const wchar_t *pSrc, const wchar_t *pDst)
{
if (hPipe == nullptr) {
DeleteFile(pDst);
if ( MoveFile(pSrc, pDst) == 0) // use copy on error
CopyFile(pSrc, pDst, FALSE);
DeleteFile(pSrc);
}
return TransactPipe(2, pSrc, pDst);
}
int SafeDeleteFile(const wchar_t *pFile)
{
if (hPipe == nullptr)
return DeleteFile(pFile);
return TransactPipe(3, pFile, nullptr);
}
int SafeCreateDirectory(const wchar_t *pFolder)
{
if (hPipe == nullptr)
return CreateDirectoryTreeW(pFolder);
return TransactPipe(4, pFolder, nullptr);
}
int SafeCreateFilePath(const wchar_t *pFolder)
{
if (hPipe == nullptr) {
CreatePathToFileW(pFolder);
return 0;
}
return TransactPipe(5, pFolder, nullptr);
}
void BackupFile(wchar_t *ptszSrcFileName, wchar_t *ptszBackFileName)
{
SafeCreateFilePath(ptszBackFileName);
SafeMoveFile(ptszSrcFileName, ptszBackFileName);
}
/////////////////////////////////////////////////////////////////////////////////////////
char* StrToLower(char *str)
{
for (int i = 0; str[i]; i++)
str[i] = tolower(str[i]);
return str;
}
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