文件名称:
VB源码--自定义数字&字符串加密工具
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文件大小: 36kb
下载次数: 0
上传时间: 2014-01-08
详细说明： VB源码--自定义数字&字符串加密工具 --VB源码 加密 解密 字符串 源码 *************以下为窗口及控件代码************ Private Sub Command1_Click() Label3.Caption = cipher(Text1.Text, Text2.Text) Label8.Caption = "加密完成！" End Sub Private Sub Command2_Click() Label4.Caption = Decipher(Text4.Text, Text3.Text) Label9.Caption = "解密完成！" End Sub Private Sub Label3_Click() Text3.Text = Label3.Caption End Sub Private Sub Label3_DblClick() Clipboard.SetText Label3.Caption Label8.Caption = "复制成功！" End Sub Private Sub Label4_DblClick() Clip board.SetText Label4.Caption Label9.Caption = "复制成功！" End Sub ************以下为模块代码*************** ' Encipher the text using the pasword.加密 Public Function cipher(ByVal password As String, ByVal from_text As String) Const MIN_ASC = 32 ' Space. Const MAX_ASC = 126 ' ~. Const NUM_ASC = MAX_ASC - MIN_ASC + 1 Dim offset As Long Dim str_len As Integer Dim i As Integer Dim ch As Integer Dim to_text As String ' Initialize the random number generator. offset = NumericPassword(password) Rnd -1 Randomize offset ' Encipher the string. str_len = Len(from_text) For i = 1 To str_len ch = Asc(Mid$(from_text, i, 1)) If ch >= MIN_ASC And ch <= MAX_ASC Then ch = ch - MIN_ASC offset = Int((NUM_ASC + 1) * Rnd) ch = ((ch + offset) Mod NUM_ASC) ch = ch + MIN_ASC to_text = to_text & Chr$(ch) End If Next i cipher = to_text End Function ' Encipher the text using the pasword.解密 Public Function Decipher(ByVal password As String, ByVal from_text As String) Const MIN_ASC = 32 ' Space. Const MAX_ASC = 126 ' ~. Const NUM_ASC = MAX_ASC - MIN_ASC + 1 Dim offset As Long Dim str_len As Integer Dim i As Integer Dim ch As Integer Dim to_text As String ' Initialize the random number generator. offset = NumericPassword(password) Rnd -1 Randomize offset ' Encipher the string. str_len = Len(from_text) For i = 1 To str_len ***************** 省略部分代码（内详） ***************** If ch < 0 Then ch = ch + NUM_ASC ch = ch + MIN_ASC to_text = to_text & Chr$(ch) End If Next i Decipher = to_text End Function ' Translate a password into an offset value. Private Function NumericPassword(ByVal password As String) As Long Dim value As Long Dim ch As Long Dim shift1 As Long Dim shift2 As Long Dim i As Integer Dim str_len As Integer str_len = Len(password) For i = 1 To str_len ' Add the next letter. ch = Asc(Mid$(password, i, 1)) ***************** 省略部分代码（内详） ***************** Next i NumericPassword = value End Function ...展开收缩
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