Code penyisipan data ke file encrypt, menghapus, membaca dan proses file

  Code encrypt data

  Public Function cRC4(inp As String, key As String) As String On Error Resume Next Dim s(0 To 255) As Byte, K(0 To 255) As Byte, i As Long Dim j As Long, temp As Byte, y As Byte, t As Long, x As Long Dim Outp As String For i = 0 To 255 s(i) = i Next j = 1 For i = 0 To 255 If j > Len(key) Then j = 1 K(i) = Asc(Mid(key, j, 1)) j = j + 1 Next i j = 0 For i = 0 To 255 j = (j + s(i) + K(i)) Mod 256 temp = s(i) s(i) = s(j) s(j) = temp Next i i = 0 j = 0 For x = 1 To Len(inp) i = (i + 1) Mod 256 j = (j + s(i)) Mod 256 temp = s(i) s(i) = s(j) s(j) = temp t = (s(i) + (s(j) Mod 256)) Mod 256 y = s(t) Outp = Outp & Chr(Asc(Mid(inp, x, 1)) Xor y) Next cRC4 = Outp End Function

  Code browsing file

  Option Explicit Private Sub cmdBACK_Click() On Error Resume Next frmSTART.Show Unload Me End Sub Private Sub cmdBROWSE_Click() On Error Resume Next Dim obj As CDLG, fNAME As String Set obj = New CDLG Me.CommonDialog1.ShowOpen nFile = Me.CommonDialog1.FileName fsFile = nFile If nFile <> "" Then Me.txtFILE.Text = nFile End If 'fFile = fNAME End Sub Private Sub cmdCANCEL_Click() On Error Resume Next Unload Me End Sub Private Sub cmdNEXT_Click() On Error Resume Next Dim frm As frmPASSWORD 'Dim frm As Form1 Set frm = New frmPASSWORD 'Set frm = New Form1 frm.Show Unload Me End Sub Private Sub txtFILE_Change() On Error Resume Next If txtFILE.Text = "" Then Me.cmdNEXT.Enabled = False Else Me.cmdNEXT.Enabled = True End If End Sub

  Code penyisipan data ke file encrypt, menghapus, membaca dan proses file

  Public oPil As String Public nFile As String Public nPass As String Public fsFile As String Option Explicit Dim AllFile As String Public TxtLen As String * 5 Public PassLen As String * 2 Public DataExist As Boolean Public Const NoPass = "N0p455w" Public Const StartData = "°|" Public Const StartPass = "|°" Public Const EndData = "DNE" Public Function Del_Spaces(Str As String) As String On Error GoTo q Dim Str1 As String Dim Str2 As String Str1 = InStr(1, Str, " ") Str2 = Left$(Str, Str1 - 1) Del_Spaces = Str2 Exit Function q: Del_Spaces = Str End Function Private Function Get_Strings(Str As String) As String Dim No_S As String Dim Get_D As String No_S = Del_Spaces(Str) Get_D = Decrypt(No_S) Get_Strings = Get_D End Function Public Function Encrypt(ByVal Str As String) Dim Letter As String, i '----------------------------------------------------------------- For i = 1 To Len(Str) ' Very lame type of encryption,..

  Letter = Mid$(Str, i, 1) ' I just put it to make an example Mid$(Str, i, 1) = Chr(Asc(Letter) + 10) ' the 10 is the ascii value changed from password...

  Next i ' you can change it to what ever you want as long as it's under 255 Encrypt = Str '----------------------------------------------------------------- End Function

  'this function is the decryption Public Function Decrypt(ByVal Str As String) Dim Letter As String, i For i = 1 To Len(Str) Letter = Mid$(Str, i, 1) Mid$(Str, i, 1) = Chr(Asc(Letter) - 10) Next i Decrypt = Str End Function Public Function Check_data(sFIle As String) As Boolean '--------------------------------------------- Dim endD As String * 3 ' Function that check if there's data in thefile Open sFIle For Binary As #1 ' finding the public constant "DNE" Get #1, LOF(1) - 2, endD '--------------------------------------------- Close #1 If endD = EndData Then Check_data = True Else Check_data = False End Function Public Sub Del_Data(Question As Boolean) On Error GoTo q '-------------------------------------------- Dim Str1 As String ' This Sub delete the data from the file Dim Str2 As String, StndBy As String '-------------------------------------------- Dim box, Instead As String, NewF As String DataExist = Check_data(nFile) If DataExist = True Then If Question = False Then GoTo W box = MsgBox("Are You Sure You Want to Delete ALL The Data In The Current File?", vbCritical + vbYesNo, "Are You Sure?") If box = vbNo Then Exit Sub Else W: Open nFile For Binary As #1 ' Opens the file in binary mode, AllFile = Space(LOF(1)) ' Grabs ALL the file into the AllFile variable Get #1, , AllFile Close #1 Str1 = InStrRev(AllFile, StartData, -1) ' Finds the char "°|" in the file Str2 = Mid$(AllFile, Str1) ' Finds the Data in the file

  StndBy = InStrRev(AllFile, Str2, -1, vbBinaryCompare) ' Gets the Len of the data, including all tthe strings Instead = Left$(AllFile, StndBy - 1) ' Gets the file inself, without the data '----------------------------------------------------------- NewF = App.Path & "\TempFile.SCD" Open NewF For Binary As #2 '---------------------------------- Put #2, , Instead ' Creates a new temporary Close #2 ' file without the data '---------------------------------- Kill nFile: Name NewF As nFile ' Delete the current file and renames the Temp one as the normal file End If Else MsgBox "This File Does Not Contain Any Data", vbInformation, "Info:..." End If Exit Sub q: MsgBox "Error: " & Err.Description, vbInformation, "ERROR:..." End Sub Function Load_Data(sFIle As String, sPass As String) As String On Error GoTo W Dim InputPass, FornE As String * 3 Dim ForN As String * 5, ForP As String * 2 Dim Str1 As String, New_data As String Dim Passw As String, Datan As String DataExist = Check_data(sFIle) If DataExist = False Then MsgBox "This File Does Not Contain Any Data", vbInformation, "Info:..." Else If FileLen(sFIle) >= 64000 Then MsgBox "Tekan Tombol oke ", vbInformation, "INFO:..." Open sFIle For Binary As #1 AllFile = Input(LOF(1), #1) Get #1, LOF(1) - 9, ForN Get #1, , ForP

  DoEvents Close #1 TxtLen = Get_Strings(ForN) PassLen = Get_Strings(ForP) Str1 = InStrRev(AllFile, StartPass, -1) New_data = Mid$(AllFile, Str1 + 2) Passw = Left$(New_data, PassLen) If Passw = NoPass Then ' If the file has no password then...

  GoTo q Else Passw = Decrypt(Left$(New_data, PassLen)) ' Decrypts the password...

  '------------------------------------------- InputPass = sPass If InputPass = Passw Then GoTo q Else MsgBox "Incorrect Password", vbInformation, "ERROR..." End If End If Exit Function q: '---------------------------------------------- Str1 = InStrRev(AllFile, StartData, -1) ' Finds the char "°|" in the file New_data = Mid$(AllFile, Str1 + 2) ' Finds the Data encrypted in the file Datan = Decrypt(Left$(New_data, TxtLen)) ' Decrypts the Data & put it to the textbox Load_Data = Datan '---------------------------------------------- Exit Function W: MsgBox "Error: " & Err.Description, vbCritical, "ERROR:..." End Function Public Sub Save_Data(sFIle As String, sText As String, nPass As String) On Error GoTo q '------------------------------------------ Dim Data As String, Passw As String ' This one saves the data in the file :D Dim box '------------------------------------------ DataExist = Check_data(nFile) If DataExist = True Then box = MsgBox("There's Currently Data In The File, Do You Want To Overwrite It?", vbInformation + vbYesNo, "Info:..") If box = vbYes Then Del_Data False GoTo W

  Else Exit Sub End If Else W: Data = Encrypt(sText) TxtLen = Encrypt(Len(sText)) ' The next commands just put the settings with the data at the END of the file Open sFIle For Binary As #1 Seek #1, LOF(1) + 1 Put #1, , StartData Put #1, , Data Put #1, , StartPass ' If .Check1.Value = vbUnchecked Then ' PassLen = Encrypt("7") ' Encrypt the length of the public const "Nopass" ' Put #1, , NoPass ' Else Passw = Encrypt(nPass) PassLen = Encrypt(Len(nPass)) Put #1, , Passw ' End If Put #1, , TxtLen Put #1, , PassLen Put #1, , EndData Close #1 MsgBox "Data Saved Successfully", vbInformation, "Info" End If Exit Sub q: MsgBox "Error: " & Err.Description, vbInformation, "ERROR:..." End Sub