一个简单实用的 vb 加密/解密算法 (转)

最新推荐文章于 2020-11-27 10:25:19 发布

csd3176

最新推荐文章于 2020-11-27 10:25:19 发布

阅读量362

点赞数

本文介绍了一种使用VB实现的简单实用的加密和解密算法。该算法通过一系列的数学运算来加密用户输入的字符串，并能正确地进行解密还原。文章提供了完整的VB函数代码示例。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

一个简单实用的 vb 加密/解密算法 (转)[@more@]

Function UserCode(password As String) As String
'用户口令加密
Dim il_bit, il_x, il_y, il_z, il_len, i As Long
Dim is_out As String
il_len = Len(password)
il_x = 0
il_y = 0
is_out = ""
For i = 1 To il_len
il_bit = AscW(Mid(password, i, 1)) 'W系列支持unicode

il_y = (il_bit * 13 Mod 256) + il_x
is_out = is_out & ChrW(Fix(il_y)) '取整 int和fix区别: fix修正负数
il_x = il_bit * 13 / 256
Next
is_out = is_out & ChrW(Fix(il_x))

password = is_out
il_len = Len(password)
il_x = 0
il_y = 0
is_out = ""
For i = 1 To il_len
il_bit = AscW(Mid(password, i, 1))
'取前4位值
il_y = il_bit / 16 + 64
is_out = is_out & ChrW(Fix(il_y))
'取后4位值
il_y = (il_bit Mod 16) + 64
is_out = is_out & ChrW(Fix(il_y))
Next
UserCode = is_out
End Function
Function UserDeCode(password As String) As String
'口令解密
Dim is_out As String
Dim il_x, il_y, il_len, i, il_bit As Long

il_len = Len(password)
il_x = 0
il_y = 0
is_out = ""
For i = 1 To il_len Step 2
il_bit = AscW(Mid(password, i, 1))
'取前4位值
il_y = (il_bit - 64) * 16
'取后4位值
'dd = AscW(Mid(password, i + 1, 1)) - 64
il_y = il_y + AscW(Mid(password, i + 1, 1)) - 64
is_out = is_out & ChrW(il_y)
Next

il_x = 0
il_y = 0
password = is_out
is_out = ""

il_len = Len(password)
il_x = AscW(Mid(password, il_len, 1))

For i = (il_len - 1) To 1 Step -1
il_y = il_x * 256 + AscW(Mid(password, i, 1))
il_x = il_y Mod 13
is_out = ChrW(Fix(il_y / 13)) & is_out
Next
UserDeCode = is_out
End Function

来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/10752043/viewspace-989537/，如需转载，请注明出处，否则将追究法律责任。

转载于:http://blog.itpub.net/10752043/viewspace-989537/