Vamos haber que sale de aca.....
http://www.ajpdsoft.com/modules.php?name=News&file=article&sid=184
http://ciberconta.unizar.es/sic/practicas/factura.htm
http://www.eduardolopez.es/2008/06/01/firma-de-pdf-mediante-la-libreria-itextsharp/
http://www.tbs-certificats.com/fom-serve/cache/316.html
http://xml-utils.com/category/java/page/2/
Solución: hagamos un formulario con este codigo
Para firmar las facturas de clientes o cualquier fichero PDF que elaboro con mi programa "Balances" uso de manera definitiva el fichero descrito en http://www.tbs-certificats.com/fom-serve/cache/316.html y con la versión 2, que encontrareis en http://www.tbs-certificats.com/fom-serve/cache/313.html
La forma de usarlo es siguiendo las indicaciones que detallo más abajo y cuyas dos funciones principales para MS-Access hayareis en http://www.quickpdf.org/forum/forum_posts.asp?TID=437 ( Function SignPdf ) y SyncShell.bas que hayareis en http://aircross.hp.infoseek.co.jp/vb_synshell.htm
Private Sub cmdFirma_Click()
Call SignPdf(CurrentProject.Path & "\fact.pdf", CurrentProject.Path & "\ELQUESEA.pfx", "POREJEMPLO")
End Sub
Public Function SignPdf(FileName As String, Certificat As String, CertificatKey As String) As Boolean
Dim strTemp As String
Dim RepFile As String
RepFile = FileNamePath(FileName)
strTemp = "java -jar " & Chr(34) & CurrentProject.Path & "\TBSSignaturePDF-0.2.jar" & Chr(34) & " "
strTemp = strTemp & "-in " & Chr(34) & FileName & Chr(34) & " "
strTemp = strTemp & "-pkcs12 " & Chr(34) & Certificat & Chr(34) & " "
strTemp = strTemp & "-passwd " & CertificatKey & " "
strTemp = strTemp & "-mode ppkLite "
strTemp = strTemp & "-reason «Certifico la precisión y validez de este documento»"
strTemp = strTemp & "-location «Barcelona»"
On Error Resume Next
Kill RepFile & "signed.pdf"
On Error GoTo 0
SyncShell strTemp, , True
If Dir(RepFile & "signed.pdf") <> "" Then
SignPdf = True
Kill FileName
Name RepFile & "signed.pdf" As FileName
Else
SignPdf = False
End If
End Function
Private Function FileNamePath(FileName As String) As String
'return the path of a file
Dim iPosit As Integer
iPosit = InStrRev(FileName, "\")
If iPosit Then
FileNamePath = Left(FileName, iPosit)
Else
FileNamePath = ""
End If
End Function
en un modulo
'
Attribute VB_Name = "mdlSyncShell"
Option Explicit
Public Const NORMAL_PRIORITY_CLASS = &H20&
Public Const STARTF_USESHOWWINDOW = &H1
Public Const SW_HIDE = 0
Public Const SW_SHOWNORMAL = 1
Public Const SW_SHOWMINIMIZED = 2
Public Const SW_SHOWMAXIMIZED = 3
Public Const SW_SHOWNOACTIVATE = 4
Public Const SW_MINIMIZE = 6
Public 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
Public Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessID As Long
dwThreadID As Long
End Type
Public Declare Function WaitForSingleObject Lib "kernel32" ( _
ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Public Declare Function CreateProcess Lib "kernel32" Alias "CreateProcessA" ( _
ByVal lpApplicationName As Long, ByVal lpCommandLine As String, _
ByVal lpProcessAttributes As Long, ByVal lpThreadAttributes As Long, _
ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, _
ByVal lpEnvironment As Long, ByVal lpCurrentDirectory As Long, _
lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long
Public Declare Function CloseHandle Lib "kernel32" _
(ByVal hObject As Long) As Long
Public Declare Function GetExitCodeProcess Lib "kernel32" _
(ByVal hProcess As Long, lpExitCode As Long) As Long
' cmdline 実行するプログラム
' windowstyle 実行するプログラムのウィンドウの形式
' waiting 終了を待機する時間(ms) -1:終了するまで
Public Function SyncShell(ByVal cmdline As String, _
Optional ByVal windowstyle As Long = vbNormalFocus, _
Optional ByVal waiting As Long = -1) As Long
Dim pi As PROCESS_INFORMATION
Dim si As STARTUPINFO
' 実行するプログラムのウィンドウの形式を設定
si.cb = Len(si)
si.dwFlags = STARTF_USESHOWWINDOW
Select Case windowstyle
Case vbHide: si.wShowWindow = SW_HIDE
Case vbMinimizedFocus: si.wShowWindow = SW_SHOWMINIMIZED
Case vbMaximizedFocus: si.wShowWindow = SW_SHOWMAXIMIZED
Case vbNormalNoFocus: si.wShowWindow = SW_SHOWNOACTIVATE
Case vbMinimizedNoFocus: si.wShowWindow = SW_MINIMIZE
Case Else: si.wShowWindow = SW_SHOWNORMAL
End Select
' プログラムを実行
Dim ret As Long
ret = CreateProcess(0, cmdline, 0, 0, 1, NORMAL_PRIORITY_CLASS, 0, 0, si, pi)
' プログラムの終了まで待機
With pi
ret = WaitForSingleObject(.hProcess, waiting)
GetExitCodeProcess .hProcess, ret
CloseHandle .hThread
CloseHandle .hProcess
End With
SyncShell = ret
End Function
Y con ese fichero "TBSSignaturePDF-0.1.jar" , ó este otro "TBSSignaturePDF-0.2.jar" que podras en la web encontrar... yasta, el fichero pdf firmado de manera digital.