用XOR是简单.
每个文件分开处理会方便些.
每个文件分开处理会方便些.
解决方案 »
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Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "COMDLG32.OCX"
Object = "{831FDD16-0C5C-11D2-A9FC-0000F8754DA1}#2.0#0"; "MSCOMCTL.OCX"
Begin VB.Form Form1
Caption = "Form1"
ClientHeight = 3195
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 3195
ScaleWidth = 4680
StartUpPosition = 3 '窗口缺省
Begin MSComctlLib.ProgressBar ProgressBar1
Height = 255
Left = 480
TabIndex = 5
Top = 1920
Visible = 0 'False
Width = 3735
_ExtentX = 6588
_ExtentY = 450
_Version = 393216
Appearance = 1
End
Begin VB.TextBox Text4
Height = 375
IMEMode = 3 'DISABLE
Left = 2520
PasswordChar = "*"
TabIndex = 4
Top = 1200
Width = 1575
End
Begin VB.TextBox Text3
Height = 375
IMEMode = 3 'DISABLE
Left = 600
PasswordChar = "*"
TabIndex = 3
Top = 1200
Width = 1575
End
Begin VB.CommandButton Btnok
Caption = "&OK"
Height = 375
Left = 1800
TabIndex = 2
Top = 2400
Width = 1095
End
Begin MSComDlg.CommonDialog Clg1
Left = 120
Top = 2400
_ExtentX = 847
_ExtentY = 847
_Version = 393216
End
Begin VB.TextBox Text2
Height = 495
Left = 2640
MultiLine = -1 'True
TabIndex = 1
Text = "Jm.frx":0000
Top = 240
Width = 1455
End
Begin VB.TextBox Text1
Height = 495
Left = 600
MultiLine = -1 'True
TabIndex = 0
Text = "Jm.frx":0006
Top = 240
Width = 1575
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End TypePrivate Type WIN32_FIND_DATA
dwFileAttributes As Long
ftCreationTime As FILETIME
ftLastAccessTime As FILETIME
ftLastWriteTime As FILETIME
nFileSizeHigh As Long
nFileSizeLow As Long
dwReserved0 As Long
dwReserved1 As Long
cFileName As String * 260
cAlternate As String * 14
End TypePrivate Declare Function FindFirstFile Lib "kernel32" Alias "FindFirstFileA" (ByVal lpFileName As String, lpFindFileData As WIN32_FIND_DATA) As LongPrivate Declare Function DeleteFile Lib "kernel32" Alias "DeleteFileA" (ByVal lpFileName As String) As LongPrivate Sub Command1_Click()End SubPrivate Sub Btnok_Click()
If Text1.Text = "" Then
beep
MsgBox "必须有源文件名!", vbQuestion, "注意:"
Text1.SetFocus
Exit Sub
End If
If Text2.Text = "" Then
beep
MsgBox "必须有目标文件名!", vbQuestion, "注意:"
Text1.SetFocus
Exit Sub
End If
If Text1.Text = Text2.Text Then
beep
MsgBox "源文件和目标文件不能同名", vbQuestion, "注意:"
Text1.SetFocus
Exit Sub
End If
If Text3.Text <> Text4.Text Then
beep
MsgBox "确认密码不对"
Text3.SetFocus
Exit Sub
End If
Dim i As Long
Dim Length As Integer
Dim Encode As Long
Length = Len(Text3.Text)
If Length = 0 Then
Encode = -30
Else
For i = 1 To Length
Encode = Encode + Asc(Mid(Text3.Text, i, 1)) * 256 * i
Next i
Encode = -Encode
End If
Dim Fn1 As Long
Dim Fn2 As Long
Fn1 = FreeFile
Open Text1.Text For Binary Access Read As #Fn1
Fn2 = FreeFile
Open Text2.Text For Binary Access Write As #Fn2
Form1.MousePointer = 11
ProgressBar1.Visible = True
Dim Flength As Long
Dim Size As Long
Dim Byteblock() As Byte
Dim Position As Long
Dim J As Long
Flength = LOF(Fn1)
Size = 32768
Position = 0
Rnd (Encode)
Do While Position < Flength
If Flength - Position < Size Then Size = Flength - Position
ReDim Byteblock(1 To Size)
Get #Fn1, Position + 1, Byteblock
For J = 1 To Size
Byteblock(J) = Byteblock(J) Xor Int(Rnd * 256)
Next J
Put #Fn2, Position + 1, Byteblock
Position = Position + Size
ProgressBar1.Value = Int(Position / Flength * 100)
Loop
Close Fn1, Fn2
beep
If Cb_del Then DeleteFile (Text3.Text)
ProgressBar1.Visible = False
Form1.MousePointer = 0
MsgBox "加密/解密完毕!", vbOKOnly, "注意:"
End Sub
Private Sub Text1_DblClick()
Clg1.DialogTitle = "打开源文件名:"
Clg1.Filter = "所有文件(*.*)|*.*|*.JM文件|*.JM"
Clg1.ShowOpen
If Clg1.FileName <> "" Then
Dim Length As Integer
Dim exname As String
Length = Len(Clg1.FileName)
exname = Mid(Clg1.FileName, Length - 2, 3)
Text1.Text = Clg1.FileName
If UCase(exname) = ".JM" Then
Text2.Text = Mid(Clg1.FileName, 1, Length - 3)
Else Text2.Text = Clg1.FileName + ".JM"
End If
End If
End SubPrivate Sub Text2_DblClick()
Clg1.DialogTitle = "打开目标文件名:"
Clg1.Filter = "All files(*.*)|*.*"
Clg1.ShowOpen
If Clg1.FileName <> "" Then
Text2.Text = Clg1.FileName + ".JM"
End If
End Sub