加解密文本的函數

發布時間: 2012/6/26 16:45:38

rivate Function Encrypt(ByVal strSource As String, ByVal Key1 As Byte, _ ByVal Key2 As Integer) As String Dim bLowData As Byte Dim bHigData As Byte Dim i As Integer Dim strEncrypt As String Dim strChar As String For i = 1 To Len(strSource) '從待加（解）密字符串中取出一個字符 strChar = Mid(strSou...

正文：

Private Sub Comman1_Click()
Dim str1, str2, str3 As String
str1 = "王宇虹"
str2 = Encrypt(str1, 188, 24)
MsgBox str2
str3 = Encrypt(str2, 188, 24)
MsgBox str3
End Sub

Private Function Encrypt(ByVal strSource As String, ByVal Key1 As Byte, _
ByVal Key2 As Integer) As String
Dim bLowData As Byte
Dim bHigData As Byte
Dim i As Integer
Dim strEncrypt As String
Dim strChar As String
For i = 1 To Len(strSource)

'從待加（解）密字符串中取出一個字符

strChar = Mid(strSource, i, 1)

'　取字符的低字節和Key1進行異或運算

bLowData = AscB(MidB(strChar, 1, 1)) Xor Key1

'取字符的高字節和K2進行異或運算

bHigData = AscB(MidB(strChar, 2, 1)) Xor Key2

'將運算后的數據合成新的字符

strEncrypt = strEncrypt & ChrB(bLowData) & ChrB(bHigData)

Next
Encrypt = strEncrypt
End Function

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