Temas

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Hola gente!

Pues andaba un poco aburrido ayer y me desidi a crear una shell local, con unas modificaiones podran meterla en un subproseso, una socket, o lo que se les ocurra  

Les dejo el codigo y un ejemplo de uso

Código (vb) [Seleccionar] Expandir


' ****************************************************************************************************************************** '
'
' --- Autor: Jhonjhon_123 (Jhon Jairo Pro Developer)
' --- Versión: 1.0
' --- Descripción: Shell a nivel local en windows
' --- Fallos y Mejoras: MSN; j.j.g.p@hotmail.com
' --- Licencia: GNU General Public License
'
' ****************************************************************************************************************************** '
Option Explicit

Private Declare Function PeekNamedPipe Lib "kernel32" (ByVal hNamedPipe As Long, lpBuffer As Any, ByVal nBufferSize As Long, lpBytesRead As Long, lpTotalBytesAvail As Long, lpBytesLeftThisMessage As Long) As Long
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As Any) As Long
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Long) As Long

Private Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As Any, ByVal nSize As Long) As Long
Private Declare Function CreateProcess Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, ByVal lpCommandLine As String, lpProcessAttributes As Any, lpThreadAttributes As Any, ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDriectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long

Private Declare Function DuplicateHandle Lib "kernel32" (ByVal hSourceProcessHandle As Long, ByVal hSourceHandle As Long, ByVal hTargetProcessHandle As Long, lpTargetHandle As Long, ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwOptions As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long

Private Const STARTF_USESTDHANDLES          As Long = &H100
Private Const STARTF_USESHOWWINDOW          As Long = &H1
Private Const DUPLICATE_SAME_ACCESS         As Long = &H2
Private Const NORMAL_PRIORITY_CLASS         As Long = &H20


Private Type SECURITY_ATTRIBUTES
   nLength                                As Long
   lpSecurityDescriptor                   As Long
   bInheritHandle                         As Long
End Type

Private Type STARTUPINFO
   cb                                     As Long
   lpReserved                             As String
   lpDesktop                              As String
   lpTitle                                As String
   dwX                                    As Long
   dwY                                    As Long
   dwXSize                                As Long
   dwYSize                                As Long
   dwXCountChars                          As Long
   dwYCountChars                          As Long
   dwFillAttribute                        As Long
   dwFlags                                As Long
   wShowWindow                            As Integer
   cbReserved2                            As Integer
   lpReserved2                            As Long
   hStdInput                              As Long
   hStdOutput                             As Long
   hStdError                              As Long
End Type

Private Type PROCESS_INFORMATION
   hProcess                               As Long
   hThread                                As Long
   dwProcessID                            As Long
   dwThreadId                             As Long
End Type

Dim lHInput As Long
Dim lHOutput As Long
Dim lCmdID As Long

Public Sub StopShell()

If lHInput > 0 Then Call CloseHandle(lHInput)

If lHOutput > 0 Then Call CloseHandle(lHOutput)

If lCmdID > 0 Then Call TerminateProcess(lCmdID, ByVal 0&): Call CloseHandle(lCmdID)

End Sub

Public Function GetOutTextShell(sOut As String) As Boolean
Dim bBuffer() As Byte
Dim lLen As Long
Dim bRes As Boolean
Dim lLenBuff As Long

bRes = CBool(PeekNamedPipe(lHOutput, 0&, 0&, 0&, lLen, 0&))

If Not bRes Then Exit Function

If lLen <= 0 Then Exit Function

ReDim bBuffer(lLen)

If ReadFile(lHOutput, bBuffer(0), lLen, lLenBuff, ByVal 0&) = 0 Then Exit Function

sOut = Left(StrConv(bBuffer, vbUnicode), lLenBuff)

GetOutTextShell = True

End Function

Public Sub SendToShell(sCMD As String)
Dim sBytes() As Byte
Dim BytesWritten As Long

If lHInput = 0 Then Exit Sub
sCMD = sCMD & vbNewLine
sBytes = StrConv(sCMD, vbFromUnicode)

If WriteFile(lHInput, ByVal sCMD, Len(sCMD), BytesWritten, 0&) = 0 Then
   Exit Sub
End If

End Sub

Public Function StartShell() As Boolean
On Error GoTo Error

Dim tSecurityAttributes As SECURITY_ATTRIBUTES
Dim tStartInfo          As STARTUPINFO
Dim tProcessInfo        As PROCESS_INFORMATION
Dim lCurrentID          As Long

lCurrentID = GetCurrentProcess()

With tStartInfo
   .cb = Len(tStartInfo)
   .dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW
End With

With tSecurityAttributes
   .nLength = Len(tSecurityAttributes)
   .bInheritHandle = 1
End With

If CreatePipe(lHOutput, tStartInfo.hStdOutput, tSecurityAttributes, 0) = 0 Then
   GoTo Error
End If

If CreatePipe(tStartInfo.hStdInput, lHInput, tSecurityAttributes, 0) = 0 Then
   GoTo Error
End If

If DuplicateHandle(lCurrentID, tStartInfo.hStdOutput, lCurrentID, tStartInfo.hStdError, 0&, True, DUPLICATE_SAME_ACCESS) = 0 Then
   GoTo Error
End If

If CreateProcess(vbNullString, "cmd", tSecurityAttributes, tSecurityAttributes, 1, NORMAL_PRIORITY_CLASS, ByVal 0&, vbNullString, tStartInfo, tProcessInfo) = 0 Then
   GoTo Error
End If

With tProcessInfo
   Call CloseHandle(.hThread)
   
   lCmdID = .hProcess

   If .dwProcessID > 0 And .hProcess > 0 Then
       StartShell = True
   Else
       GoTo Error
   End If
End With

Exit Function
Error:
Call StopShell
StartShell = False

End Function


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Saludos