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Remote.cpp
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Remote.cpp
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#include "stdafx.h"
#include "PAExec.h"
#include <process.h>
volatile long gInProcessRequests = 0;
extern CString gLogPath;
CString GetRemoteServiceName(Settings& settings);
bool EstablishConnection(Settings& settings, LPCTSTR lpszRemote, LPCTSTR lpszResource, bool bConnect)
{
DWORD rc = 0;
if(0 == wcscmp(lpszRemote, L"."))
return true; //already connected to self
CString remoteResource = StrFormat(L"\\\\%s\\%s", lpszRemote, lpszResource);
if(bConnect)
{
//already connected??
HANDLE hEnum = NULL;
if(NO_ERROR == WNetOpenEnum(RESOURCE_CONNECTED, RESOURCETYPE_ANY, 0, NULL, &hEnum))
{
bool bConnected = false;
BYTE buf[65536] = {0};
DWORD count = (DWORD)-1;
DWORD bufSize = sizeof(buf);
WNetEnumResource(hEnum, &count, buf, &bufSize);
for(DWORD i = 0; i < count; i++)
{
NETRESOURCE* pNR = (NETRESOURCE*)buf;
if(0 == _wcsicmp(pNR[i].lpRemoteName, remoteResource))
{
bConnected = true;
break;
}
}
WNetCloseEnum(hEnum);
if(bConnected)
{
if(NULL != wcsstr(lpszResource, L"IPC$"))
settings.bNeedToDetachFromIPC = false;
else
if(NULL != wcsstr(lpszResource, L"ADMIN$"))
settings.bNeedToDetachFromAdmin = false;
else
_ASSERT(0);
return true;
}
}
NETRESOURCE nr = {0};
nr.dwType = RESOURCETYPE_ANY;
nr.lpLocalName = NULL;
nr.lpRemoteName = (LPWSTR)(LPCWSTR)remoteResource;
nr.lpProvider = NULL;
//Establish connection (using username/pwd)
rc = WNetAddConnection2(&nr, settings.password.IsEmpty() ? NULL : settings.password, settings.user.IsEmpty() ? NULL : settings.user, 0);
if(NO_ERROR == rc)
{
if(NULL != wcsstr(lpszResource, L"IPC$"))
settings.bNeedToDetachFromIPC = true;
else
if(NULL != wcsstr(lpszResource, L"ADMIN$"))
settings.bNeedToDetachFromAdmin = true;
else
_ASSERT(0);
return true;
}
else
{
Log(StrFormat(L"Failed to connect to %s.", remoteResource), rc);
if(NULL != wcsstr(lpszResource, L"IPC$"))
settings.bNeedToDetachFromIPC = false;
else
if(NULL != wcsstr(lpszResource, L"ADMIN$"))
settings.bNeedToDetachFromAdmin = false;
else
_ASSERT(0);
return false;
}
}
else
{
rc = WNetCancelConnection2(remoteResource, 0, FALSE);
return true;
}
}
void DeletePAExecFromRemote(LPCWSTR targetComputer, Settings& settings)
{
wchar_t myPath[_MAX_PATH * 2] = {0};
GetModuleFileName(NULL, myPath, sizeof(myPath)/sizeof(wchar_t));
LPCWSTR pFileName = wcsrchr(myPath, L'\\');
CString dest = StrFormat(L"\\\\%s\\ADMIN$\\%s", targetComputer, GetRemoteServiceName(settings) + CString(L".exe"));
if(0 == wcscmp(targetComputer, L"."))
{
//change to local system32 directory
GetWindowsDirectory(dest.GetBuffer(_MAX_PATH * 2), _MAX_PATH * 2);
dest.ReleaseBuffer();
dest += L"\\";
dest += GetRemoteServiceName(settings) + CString(L".exe");
}
int tryCount = 0;
while(FALSE == DeleteFile(dest))
{
DWORD gle = GetLastError();
if(++tryCount < 70)
{
Sleep(100);
continue;
}
Log(StrFormat(L"Failed to cleanup [%s] on %s.", dest, targetComputer), gle);
break;
}
}
bool CopyPAExecToRemote(Settings& settings, LPCWSTR targetComputer)
{
CString remoteExeName = GetRemoteServiceName(settings);
remoteExeName += L".exe";
CString dest = StrFormat(L"\\\\%s\\ADMIN$\\%s", targetComputer, remoteExeName);
wchar_t myPath[_MAX_PATH * 2] = {0};
GetModuleFileName(NULL, myPath, ARRAYSIZE(myPath));
if(0 == wcscmp(targetComputer, L"."))
{
//change to local Windows directory
GetWindowsDirectory(dest.GetBuffer(_MAX_PATH * 2), _MAX_PATH * 2);
dest.ReleaseBuffer();
dest += L"\\";
dest += remoteExeName;
}
if(0 == _wcsicmp(myPath, dest))
return true; //don't need to copy -- running from there
if((FALSE == CopyFile(myPath, dest, FALSE)) && (false == settings.bNeedToDetachFromAdmin))
{
if(gbStop)
return false;
//try attaching, and then try copy again
EstablishConnection(settings, targetComputer, L"ADMIN$", true);
if(gbStop)
return false;
if(FALSE == CopyFile(myPath, dest, FALSE))
{
DWORD gle = GetLastError();
Log(StrFormat(L"Failed to copy [%s] to [%s] -- going to try to continue anyway.", myPath, dest), gle);
}
else
settings.bNeedToDeleteServiceFile = true;
}
else
settings.bNeedToDeleteServiceFile = true;
return true;
}
//using unique service names so multiple remote requests (even from different source computers)
//can be happening at once
CString GetRemoteServiceName(Settings& settings)
{
if(settings.bNoName)
return L"PAExec";
else
{
//Installed service will use a unique name so we can have multiple running at once
CString name = L"PAExec-";
wchar_t localComputerName[1000] = {0};
DWORD len = ARRAYSIZE(localComputerName);
GetComputerNameEx(ComputerNamePhysicalNetBIOS, localComputerName, &len);
name += StrFormat(L"%u-%s", GetCurrentProcessId(), localComputerName);
return name;
}
}
void StopAndDeleteRemoteService(LPCWSTR remoteServer, Settings& settings)
{
if(0 == wcscmp(remoteServer, L"."))
remoteServer = NULL;
SC_HANDLE hSCM = ::OpenSCManager(remoteServer, NULL, SC_MANAGER_ALL_ACCESS);
DWORD gle = 0;
if(BAD_HANDLE(hSCM) && (false == settings.bNeedToDetachFromIPC))
{
//try attaching, and then try open again
EstablishConnection(settings, remoteServer, L"IPC$", true);
hSCM = ::OpenSCManager(remoteServer, NULL, SC_MANAGER_ALL_ACCESS);
gle = GetLastError();
}
if (BAD_HANDLE(hSCM))
{
Log(StrFormat(L"Failed to connect to Service Control Manager on %s. Can't cleanup PAExec.", remoteServer ? remoteServer : L"{local computer}"), gle);
return;
}
// try to stop and delete now
SC_HANDLE hService =::OpenService(hSCM, GetRemoteServiceName(settings), SERVICE_ALL_ACCESS);
gle = GetLastError();
if (!BAD_HANDLE(hService))
{
SERVICE_STATUS stat = {0};
BOOL b = ControlService(hService, SERVICE_CONTROL_STOP, &stat);
if(FALSE == b)
{
gle = GetLastError();
Log(L"Failed to stop PAExec service.", gle);
}
int tryCount = 0;
while(true)
{
SERVICE_STATUS_PROCESS ssp = {0};
DWORD needed = 0;
if(QueryServiceStatusEx(hService, SC_STATUS_PROCESS_INFO, (BYTE*)&ssp, sizeof(ssp), &needed))
if(SERVICE_STOPPED == ssp.dwCurrentState)
{
if(DeleteService(hService))
break;
else
{
Log(L"Failed to delete PAExec service", GetLastError());
break;
}
}
tryCount++;
if(tryCount > 300)
break; //waited 30 seconds
Sleep(100);
}
::CloseServiceHandle(hService);
}
::CloseServiceHandle(hSCM);
}
// Installs and starts the remote service on remote machine
bool InstallAndStartRemoteService(LPCWSTR remoteServer, Settings& settings)
{
if(0 == wcscmp(remoteServer, L"."))
remoteServer = NULL;
SC_HANDLE hSCM = ::OpenSCManager(remoteServer, NULL, SC_MANAGER_ALL_ACCESS);
DWORD gle = GetLastError();
if(gbStop)
return false;
if(BAD_HANDLE(hSCM) && (false == settings.bNeedToDetachFromIPC))
{
//try attaching, and then try open again
EstablishConnection(settings, remoteServer, L"IPC$", true);
hSCM = ::OpenSCManager(remoteServer, NULL, SC_MANAGER_ALL_ACCESS);
gle = GetLastError();
}
if(gbStop)
return false;
if (BAD_HANDLE(hSCM))
{
Log(StrFormat(L"Failed to connect to Service Control Manager on %s.", remoteServer ? remoteServer : L"{local computer}"), gle);
return false;
}
CString remoteServiceName = GetRemoteServiceName(settings);
// Maybe it's already there and installed, let's try to run
SC_HANDLE hService =::OpenService(hSCM, remoteServiceName, SERVICE_ALL_ACCESS);
if (BAD_HANDLE(hService))
{
DWORD serviceType = SERVICE_WIN32_OWN_PROCESS;
if( ((DWORD)-1 != settings.sessionToInteractWith) || (settings.bInteractive) )
serviceType |= SERVICE_INTERACTIVE_PROCESS;
CString svcExePath = StrFormat(L"%%SystemRoot%%\\%s.exe", remoteServiceName);
if(NULL == remoteServer)
{
GetWindowsDirectory(svcExePath.GetBuffer(_MAX_PATH * 2), _MAX_PATH * 2);
svcExePath.ReleaseBuffer();
svcExePath += L"\\";
svcExePath += remoteServiceName + L".exe";
}
svcExePath += L" -service"; //so it knows it is the service when it starts
hService = ::CreateService(
hSCM, remoteServiceName, remoteServiceName,
SERVICE_ALL_ACCESS,
serviceType,
SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL,
svcExePath,
NULL, NULL, NULL,
NULL, NULL ); //using LocalSystem
DWORD gle = GetLastError();
if (BAD_HANDLE(hService))
{
::CloseServiceHandle(hSCM);
Log(StrFormat(L"Failed to install service on %s", remoteServer ? remoteServer : L"{local computer}"), gle);
return false;
}
settings.bNeedToDeleteService = true;
}
if(gbStop)
return false;
if(!StartService(hService, 0, NULL))
{
DWORD gle = GetLastError();
if(ERROR_SERVICE_ALREADY_RUNNING != gle)
{
::CloseServiceHandle(hService);
::CloseServiceHandle(hSCM);
Log(StrFormat(L"Failed to start service on %s", remoteServer ? remoteServer : L"{local computer}"), gle);
return false;
}
settings.bNeedToDeleteService = true;
}
::CloseServiceHandle(hService);
::CloseServiceHandle(hSCM);
return true;
}
bool SendSettings(LPCWSTR remoteServer, Settings& settings, HANDLE& hPipe, bool& bNeedToSendFile)
{
RemMsg msg(MSGID_SETTINGS);
settings.Serialize(msg, true);
RemMsg response;
if(false == SendRequest(remoteServer, hPipe, msg, response, settings))
return false;
if(MSGID_RESP_SEND_FILES == response.m_msgID)
{
bNeedToSendFile = true;
__int64 fileBits = 0;
response >> fileBits; //each file is a bit indicating whether it should be copied or not
__int64 testBit = 1;
for(size_t i = 0; i < min(64, settings.srcFileInfos.size()); i++)
{
if(0 != (fileBits & testBit))
settings.srcFileInfos[i].bCopyFile = true;
testBit <<= 1;
}
}
if(settings.bForceCopy)
bNeedToSendFile = true;
return true;
}
bool SendRequest(LPCWSTR remoteServer, HANDLE& hPipe, RemMsg& msgOut, RemMsg& msgReturned, Settings& settings)
{
DWORD gle = 0;
if(BAD_HANDLE(hPipe)) //need to connect?
{
CString remoteServiceName = GetRemoteServiceName(settings);
CString pipeName = StrFormat(L"\\\\%s\\pipe\\%s", remoteServer, remoteServiceName + CString(".exe"));
int count = 0;
while(true)
{
hPipe = CreateFile(
pipeName, // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, //using overlapped so we can poll gbStop flag too
NULL); // no template file
// Break if the pipe handle is valid.
if(!BAD_HANDLE(hPipe))
break;
// Exit if an error other than ERROR_PIPE_BUSY occurs.
gle = GetLastError();
if((ERROR_PIPE_BUSY != gle) && (ERROR_FILE_NOT_FOUND != gle))
{
Log(StrFormat(L"Failed to open communication channel to %s.", remoteServer), gle);
return false;
}
count++;
if(20 == count)
{
gle = GetLastError();
Log(StrFormat(L"Timed out waiting for communication channel to %s.", remoteServer), gle);
return false;
}
Sleep(1000);
}
}
//have a pipe so send
// The pipe connected; change to message-read mode.
DWORD dwMode = PIPE_READMODE_MESSAGE;
BOOL fSuccess = SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL); // don't set maximum time
if (!fSuccess)
{
gle = GetLastError();
Log(StrFormat(L"Failed to set communication channel to %s.", remoteServer), gle);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
return false;
}
HANDLE hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
OVERLAPPED ol = {0};
ol.hEvent = hEvent;
DWORD totalLen = 0;
const BYTE* pDataToSend = msgOut.GetDataToSend(totalLen);
DWORD cbWritten = 0;
// Send a message to the pipe server.
fSuccess = WriteFile(
hPipe, // pipe handle
pDataToSend, // message
totalLen, // message length
&cbWritten,// bytes written
&ol);
if (!fSuccess)
{
gle = GetLastError();
if(ERROR_IO_PENDING != gle)
{
Log(StrFormat(L"Error communicating with %s.", remoteServer), gle);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
return false;
}
}
while(true)
{
if(WAIT_OBJECT_0 == WaitForSingleObject(ol.hEvent, 0))
{
GetOverlappedResult(hPipe, &ol, &cbWritten, FALSE);
break;
}
if(gbStop)
return false;
Sleep(100);
}
bool bFirstRead = true;
do
{
BYTE buffer[16384] = {0};
ol.Offset = 0;
ol.OffsetHigh = 0;
DWORD cbRead = 0;
// Read from the pipe.
fSuccess = ReadFile(
hPipe, // pipe handle
buffer, // buffer to receive reply
sizeof(buffer), // size of buffer
&cbRead, // number of bytes read
&ol);
if(!fSuccess)
{
gle = GetLastError();
if(ERROR_IO_PENDING != gle)
{
Log(StrFormat(L"Error reading response from %s.", remoteServer), gle);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
return false;
}
}
while(true)
{
if(WAIT_OBJECT_0 == WaitForSingleObject(ol.hEvent, 0))
{
GetOverlappedResult(hPipe, &ol, &cbRead, FALSE);
break;
}
if(gbStop)
return false;
Sleep(100);
}
if(bFirstRead)
{
if(cbRead < sizeof(WORD))
{
gle = GetLastError();
Log(StrFormat(L"Received too little data from %s.", remoteServer), gle);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
return false;
}
msgReturned.SetFromReceivedData(buffer, cbRead);
bFirstRead = false;
}
else
msgReturned.m_payload.insert(msgReturned.m_payload.end(), buffer, buffer + cbRead);
} while( msgReturned.m_expectedLen != msgReturned.m_payload.size());
CloseHandle(hEvent);
return true;
}
UINT WINAPI ListenOnRemotePipes(void* p)
{
ListenParam* pLP = (ListenParam*)p;
ConnectToRemotePipes(pLP, 10, 1000);
InterlockedDecrement(&pLP->workerThreads);
return 0;
}
void StartRemoteApp(LPCWSTR remoteServer, Settings& settings, HANDLE& hPipe, int& appExitCode)
{
appExitCode = 0;
RemMsg req(MSGID_START_APP), response;
req << GetCurrentProcessId();
wchar_t compName[MAX_COMPUTERNAME_LENGTH + 1] = {0};
DWORD len = sizeof(compName)/sizeof(wchar_t);
GetComputerName(compName, &len);
req << compName;
ListenParam lp;
if((false == settings.bDontWaitForTerminate) && (false == settings.bInteractive) )
{
//ConnectToRemotePipes won't return until remote pipes are started and connected,
//but they won't be created until MSGID_START_APP is called. And SendRequest won't
//return until the remote shuts down, so we have to launch a separate thread to listen
//for the remote pipes so the main thread can continue forward and send the message
lp.pSettings = &settings;
lp.remoteServer = remoteServer;
lp.machineName = compName;
UINT ignored;
InterlockedIncrement(&lp.workerThreads);
HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, ListenOnRemotePipes, &lp, 0, &ignored);
CloseHandle(hThread);
}
SendRequest(remoteServer, hPipe, req, response, settings);
if(response.m_msgID == MSGID_OK)
{
response >> (DWORD&)appExitCode;
if(false == settings.bDontWaitForTerminate)
Log(StrFormat(L"%s returned %i", settings.app, appExitCode), false);
else
{
//exit code is really PID if not waiting
Log(StrFormat(L"%s started with process ID %u", settings.app, (DWORD)appExitCode), false);
appExitCode = 0; //value for returning from PAExec
}
}
else
{
CString lastLog;
response >> lastLog;
Log(StrFormat(L"Remote app failed to start. Returned error:\r\n %s", lastLog), true);
appExitCode = -9;
}
SetEvent(lp.hStop);
int count = 0;
while(0 < lp.workerThreads)
{
count++;
if(gbStop)
if(count > 6)
break;
Sleep(500);
}
}
bool SendFilesToRemote(LPCWSTR remoteServer, Settings& settings, HANDLE& hPipe)
{
int index = -1;
for(std::vector<FileInfo>::iterator itr = settings.srcFileInfos.begin(); settings.srcFileInfos.end() != itr; itr++)
{
index++;
if((*itr).bCopyFile)
{
CString src = (*itr).fullFilePath;
_ASSERT(FALSE == src.IsEmpty());
CString dest = StrFormat(L"\\\\%s\\ADMIN$\\PAExec_Move%u.dat", remoteServer, index);
if(0 == wcscmp(remoteServer, L"."))
{
//change to local Windows directory
GetWindowsDirectory(dest.GetBuffer(_MAX_PATH * 2), _MAX_PATH * 2);
dest.ReleaseBuffer();
dest += StrFormat(L"\\PAExec_Move%u.dat", index);
}
if(FALSE == CopyFile(src, dest, FALSE))
{
if(gbStop)
return false;
//try attaching, and then try copy again
EstablishConnection(settings, remoteServer, L"ADMIN$", true);
if(gbStop)
return false;
if(FALSE == CopyFile(src, dest, FALSE))
{
DWORD gle = GetLastError();
Log(StrFormat(L"Failed to copy [%s] to [%s].", src, dest), gle);
return false;
}
}
}
}
RemMsg msg(MSGID_SENT_FILES); //tell service file is there so it can move it to the final location (potentially using local drive letters, etc)
RemMsg response;
bool b = SendRequest(remoteServer, hPipe, msg, response, settings);
if(b)
{
if(response.m_msgID != MSGID_OK)
b = false;
}
return b;
}
static bool gRemoteSettingsMapCSInited = false;
static CRITICAL_SECTION gRemoteSettingsMapCS;
static std::map<DWORD, Settings*> gRemoteSettingsMap; //first is client's RemMsg::m_uniqueProcessID
//run at the remote service
void HandleMsg(RemMsg& msg, RemMsg& response, HANDLE hPipe)
{
InterlockedIncrement(&gInProcessRequests);
if(false == gRemoteSettingsMapCSInited)
{
gRemoteSettingsMapCSInited = true;
InitializeCriticalSection(&gRemoteSettingsMapCS);
}
#ifdef _DEBUG
Log(StrFormat(L"DEBUG: PAExec service handling msg %u", msg.m_msgID), false);
#endif
EnterCriticalSection(&gRemoteSettingsMapCS);
Settings* pRemoteSettings = gRemoteSettingsMap[msg.m_uniqueProcessID];
if(NULL == pRemoteSettings)
pRemoteSettings = new Settings();
LeaveCriticalSection(&gRemoteSettingsMapCS);
switch(msg.m_msgID)
{
case MSGID_START_APP:
{
DWORD srcPID = 0;
CString compName;
msg >> srcPID;
msg >> compName;
if((false == pRemoteSettings->bDontWaitForTerminate) && (false == pRemoteSettings->bInteractive) )
{
if(false == CreateIOPipesInService(*pRemoteSettings, compName, srcPID))
{
DWORD gle = GetLastError();
Log(StrFormat(L"Failed to open comm pipes for %s. ", pRemoteSettings->app), gle);
response.m_msgID = MSGID_FAILED;
if((false == pRemoteSettings->bNoDelete) && (false == pRemoteSettings->bDontWaitForTerminate))
{
for(std::vector<FileInfo>::iterator itr = pRemoteSettings->destFileInfos.begin(); pRemoteSettings->destFileInfos.end() != itr; itr++)
{
if((*itr).bCopyFile)
DeleteFile((*itr).fullFilePath);
}
}
break;
}
}
else
{
Log(StrFormat(L"Not using redirected IO: DontWait=%u, Interactive=%u", pRemoteSettings->bDontWaitForTerminate, pRemoteSettings->bInteractive), false);
}
if(false == StartProcess(*pRemoteSettings, hPipe))
{
response.m_msgID = MSGID_FAILED;
response << LastLog();
}
else
{
response.m_msgID = MSGID_OK;
DWORD exitCode = 0;
if(false == pRemoteSettings->bDontWaitForTerminate)
{
//doesn't work :(
// if(!BAD_HANDLE(gpRemoteSettings->hStdIn))
// {
// Sleep(1000); //wait for app to start so we can disable local echo
// if(AttachConsole(gpRemoteSettings->processID))
// {
// DWORD oldMode = 0;
// GetConsoleMode(gpRemoteSettings->hStdIn, &oldMode);
// oldMode = oldMode & ~ENABLE_ECHO_INPUT; //turn off echo
// SetConsoleMode(gpRemoteSettings->hStdIn, oldMode);
// FreeConsole();
//#ifdef _DEBUG
// Log(L"DEBUG: Might have quieted echo...");
//#endif
// }
//#ifdef _DEBUG
// else
// {
// DWORD gle = GetLastError();
// Log(L"DEBUG: Failed to quite echo in child.", gle);
// }
//#endif
// }
//wait for app to shutdown
DWORD waitMS = pRemoteSettings->timeoutSeconds * 1000;
if(waitMS == 0)
waitMS = INFINITE;
DWORD ret = WaitForSingleObject(pRemoteSettings->hProcess, waitMS);
switch(ret)
{
case WAIT_TIMEOUT:
Log(L"PAExec timed out waiting for app to exit -- terminating app", true);
TerminateProcess(pRemoteSettings->hProcess, (DWORD)-10);
break;
case WAIT_OBJECT_0: break;
default: Log(L"PAExec error waiting for app to exit", GetLastError());
break;
}
GetExitCodeProcess(pRemoteSettings->hProcess, &exitCode);
Log(StrFormat(L"%s returned %d", pRemoteSettings->app, exitCode), false);
if((false == pRemoteSettings->bNoDelete) && (false == pRemoteSettings->bDontWaitForTerminate))
{
for(std::vector<FileInfo>::iterator itr = pRemoteSettings->destFileInfos.begin(); pRemoteSettings->destFileInfos.end() != itr; itr++)
{
if((*itr).bCopyFile)
DeleteFile((*itr).fullFilePath);
}
}
}
else
{
Log(StrFormat(L"Not waiting for %s to exit", pRemoteSettings->app), false);
exitCode = pRemoteSettings->processID;
}
response << exitCode;
}
CloseHandle(pRemoteSettings->hProcess);
pRemoteSettings->hProcess = NULL;
//close pipes we redirected too also
if(!BAD_HANDLE(pRemoteSettings->hStdErr))
{
CloseHandle(pRemoteSettings->hStdErr);
pRemoteSettings->hStdErr = NULL;
}
if(!BAD_HANDLE(pRemoteSettings->hStdIn))
{
CloseHandle(pRemoteSettings->hStdIn);
pRemoteSettings->hStdIn = NULL;
}
if(!BAD_HANDLE(pRemoteSettings->hStdOut))
{
CloseHandle(pRemoteSettings->hStdOut);
pRemoteSettings->hStdOut = NULL;
}
break;
}
case MSGID_SETTINGS:
//the first call from the remote PAExec
pRemoteSettings->Serialize(msg, false);
response.m_msgID = MSGID_OK;
if(gLogPath.IsEmpty())
gLogPath = pRemoteSettings->remoteLogPath;
gbODS = pRemoteSettings->bODS; //now service will use whatever command was sent
Log(StrFormat(L"-------------\r\nUser: '%s', LocalSystem: %s, Interactive: %s, Session: %i", pRemoteSettings->user, pRemoteSettings->bUseSystemAccount ? L"true" : L"false", pRemoteSettings->bInteractive ? L"true" : L"false", pRemoteSettings->sessionToInteractWith), false);
//now see if the target file needs to be sent
if(pRemoteSettings->bCopyFiles)
{
Log(L"Settings indicate files may need to be copied -- checking...", false);
//below line also gets version information if possible
pRemoteSettings->ResolveFilePaths(); //after logging is setup. non-existent files will be marked as needing to be copied
pRemoteSettings->app = pRemoteSettings->destFileInfos[0].fullFilePath;
int index = 0;
FILETIME zero = {0};
for(std::vector<FileInfo>::iterator itr = pRemoteSettings->destFileInfos.begin(); pRemoteSettings->destFileInfos.end() != itr; itr++)
{
if(pRemoteSettings->bForceCopy)
(*itr).bCopyFile = true;
else
{
if(pRemoteSettings->bCopyIfNewerOrHigherVer)
{
//need to check date and/or version
ULARGE_INTEGER destVer, srcVer;
destVer.HighPart = (*itr).fileVersionMS;
destVer.LowPart = (*itr).fileVersionLS;
srcVer.HighPart = pRemoteSettings->srcFileInfos[index].fileVersionMS;
srcVer.LowPart = pRemoteSettings->srcFileInfos[index].fileVersionLS;
if(srcVer.QuadPart > destVer.QuadPart)
{
//source version is higher
(*itr).bCopyFile = true;
}
else
{
//newer date?
destVer.HighPart = (*itr).fileLastWrite.dwHighDateTime;
destVer.LowPart= (*itr).fileLastWrite.dwLowDateTime;
srcVer.HighPart = pRemoteSettings->srcFileInfos[index].fileLastWrite.dwHighDateTime;
srcVer.LowPart= pRemoteSettings->srcFileInfos[index].fileLastWrite.dwLowDateTime;
if(srcVer.QuadPart > destVer.QuadPart)
(*itr).bCopyFile = true; //source version has a newer date
}
}
else
{
//only copy if the target file doesn't exist
ULARGE_INTEGER destVer; //file date
destVer.HighPart = (*itr).fileLastWrite.dwHighDateTime;
destVer.LowPart= (*itr).fileLastWrite.dwLowDateTime;
if(0 == destVer.QuadPart)
(*itr).bCopyFile = true;
}
}
}
__int64 sendFileBits = 0; //a bit mask indicating whether a file needs to be copied or not
__int64 startingBit = 1;
//any files need to be copied?
for(std::vector<FileInfo>::iterator itr = pRemoteSettings->destFileInfos.begin(); pRemoteSettings->destFileInfos.end() != itr; itr++)
{
if((*itr).bCopyFile)
{
response.m_msgID = MSGID_RESP_SEND_FILES;
sendFileBits |= startingBit;
}
startingBit <<= 1;
}
response << sendFileBits;
if(MSGID_RESP_SEND_FILES == response.m_msgID)
Log(L" ...need to copy files", false);
else
Log(L" ...no files need to be copied", false);
}
break;
case MSGID_SENT_FILES:
{
//copy from ADMIN$\PAExec_Move{index}.dat to final location
response.m_msgID = MSGID_OK; //optimism
for(size_t index = 0; index < pRemoteSettings->destFileInfos.size(); index++)
{
if(pRemoteSettings->destFileInfos[index].bCopyFile)
{
wchar_t srcPath[_MAX_PATH * 2] = {0};
GetWindowsDirectory(srcPath, sizeof(srcPath)/sizeof(wchar_t));
wcscat(srcPath, StrFormat(L"\\PAExec_Move%u.dat", index));
if(FALSE == CopyFile(srcPath, pRemoteSettings->destFileInfos[index].fullFilePath, FALSE))
{
DWORD gle = GetLastError();
if(0 != _waccess(srcPath, 0))
Log(L"Source file does not exist", true);
Log(StrFormat(L"Failed to move [%s] to [%s]", srcPath, pRemoteSettings->destFileInfos[index].fullFilePath), gle);
response.m_msgID = MSGID_FAILED;
break;
}
else
{
Log(StrFormat(L"Moved %s to %s", srcPath, pRemoteSettings->destFileInfos[index].fullFilePath), false);
}
DeleteFile(srcPath);
}
}
break;
}
}
//save it in the map for later use
EnterCriticalSection(&gRemoteSettingsMapCS);
gRemoteSettingsMap[msg.m_uniqueProcessID] = pRemoteSettings;
LeaveCriticalSection(&gRemoteSettingsMapCS);
#ifdef _DEBUG
Log(StrFormat(L"DEBUG: PAExec service finished handling msg %u", msg.m_msgID), false);
#endif
InterlockedDecrement(&gInProcessRequests);
}
const BYTE* RemMsg::GetDataToSend(DWORD& totalLen)
{
if(NULL != m_pBuff)
delete [] m_pBuff;
totalLen = 0;
//build our send buffer
_ASSERT(sizeof(m_msgID) == sizeof(WORD));
totalLen = m_payload.size() + sizeof(WORD) + sizeof(DWORD) + sizeof(DWORD);
if(MSGID_SETTINGS == m_msgID)
{
//send an extra DWORD of our random XOR value
totalLen += sizeof(DWORD);
}
m_pBuff = new BYTE[totalLen];
BYTE* pPtr = m_pBuff;
memcpy(pPtr, &m_msgID, sizeof(m_msgID));
pPtr += sizeof(m_msgID);
BYTE* pXORStart = NULL;
DWORD xorVal = 0;
rand_s((unsigned int*)&xorVal);
if(MSGID_SETTINGS == m_msgID)
{
memcpy(pPtr, &xorVal, sizeof(xorVal));
pPtr += sizeof(xorVal);
pXORStart = pPtr;
}
memcpy(pPtr, &m_uniqueProcessID, sizeof(m_uniqueProcessID));
pPtr += sizeof(m_uniqueProcessID);
DWORD len = (DWORD)m_payload.size();
memcpy(pPtr, &len, sizeof(len));
pPtr += sizeof(len);
if(0 != len)
{
memcpy(pPtr, &(*m_payload.begin()), m_payload.size());
pPtr += m_payload.size();
}
if(NULL != pXORStart)
{
DWORD dataLen = pPtr - pXORStart;
//flip the rest of the data
for(DWORD i = 0; i < dataLen - (sizeof(DWORD) - 1); i++)
{
DWORD* pDW = (DWORD*)(pXORStart + i);
*pDW ^= xorVal;
xorVal += 3; //just being tricky :)
}
}