modcrypt.bas

来自「大型商业学分统计系统原代码说明 1.如果在向导设置班级数为8时,此数值为班级总数」· BAS 代码 · 共 52 行

Attribute VB_Name = "modCrypt"
Public Function Crypt(texti, salasana) As String
    On Error Resume Next
    For T = 1 To Len(salasana)
        sana = Asc(Mid(salasana, T, 1))
        X1 = X1 + sana
    Next
    X1 = Int((X1 * 0.1) / 6)
    salasana = X1
    G = 0
    For TT = 1 To Len(texti)
        sana = Asc(Mid(texti, TT, 1))
        G = G + 1
        If G = 6 Then G = 0
        X1 = 0
        If G = 0 Then X1 = sana - (salasana - 2)
        If G = 1 Then X1 = sana + (salasana - 5)
        If G = 2 Then X1 = sana - (salasana - 4)
        If G = 3 Then X1 = sana + (salasana - 2)
        If G = 4 Then X1 = sana - (salasana - 3)
        If G = 5 Then X1 = sana + (salasana - 5)
        X1 = X1 + G
        Crypted = Crypted & Chr(X1)
    Next
    Crypt = Crypted
End Function
Public Function DeCrypt(texti, salasana) As String
    On Error Resume Next
    For T = 1 To Len(salasana)
        sana = Asc(Mid(salasana, T, 1))
        X1 = X1 + sana
    Next
    X1 = Int((X1 * 0.1) / 6)
    salasana = X1
    G = 0
    For TT = 1 To Len(texti)
        sana = Asc(Mid(texti, TT, 1))
        G = G + 1
        If G = 6 Then G = 0
        X1 = 0
        If G = 0 Then X1 = sana + (salasana - 2)
        If G = 1 Then X1 = sana - (salasana - 5)
        If G = 2 Then X1 = sana + (salasana - 4)
        If G = 3 Then X1 = sana - (salasana - 2)
        If G = 4 Then X1 = sana + (salasana - 3)
        If G = 5 Then X1 = sana - (salasana - 5)
        X1 = X1 - G
        DeCrypted = DeCrypted & Chr(X1)
    Next
    DeCrypt = DeCrypted
End Function