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简单说就是做个加密‘解密的两个函数,
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在保存之前把要保存的记录先通过加密函数加密一下,再存到ini文件里,在读取的时候先读取ini里的信息再通过解密函数把他解密,然后在显示在文本框上,
加密的方式有很多,异或加密法是比较快的一种
给你一个加密字符的函数,用原字符作参数调用可以将其加密,用加密后的字符作参数调用可以将其解密。
Private Function JiaMi(a As String) As String
Dim IntAsc As Integer
IntAsc = Asc(a)
If IntAsc Mod 2 Then
IntAsc = IntAsc + 47
If IntAsc 126 Then IntAsc = IntAsc - 47
Else
IntAsc = IntAsc - 47
If IntAsc 33 Then IntAsc = IntAsc + 47
End If
JiaMi = Chr(IntAsc)
End Function
网上有很多专业的加密教程
最适合小开发者的软件加密方式就是下面这个
获取硬件信息和个人注册时的姓名手机号等一系列信息,通过预先设定好的加密函数进行散列加密,生成一个只有本人本机能使用的序列号,软件正版授权的时候用同样的方式生成序列号进行比对,一样则通过
使用加密方式存储即可实现别人无法查看内容,加密的方式有很多,适用你这里使用的是可逆的算法,推荐你使用DES加密
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.IO
Imports System.Security
Imports System.Security.Cryptography
Namespace ZU14
NotInheritable Public Class DES
Private iv As String = "1234的yzo"
Private key As String = "123在yzo"
'/ summary
'/ DES加密偏移量,必须是=8位长的字符串
'/ /summary
Public Property IV() As String
Get
Return iv
End Get
Set
iv = value
End Set
End Property
'/ summary
'/ DES加密的私钥,必须是8位长的字符串
'/ /summary
Public Property Key() As String
Get
Return key
End Get
Set
key = value
End Set
End Property
'/ summary
'/ 对字符串进行DES加密
'/ /summary
'/ param name="sourceString"待加密的字符串/param
'/ returns加密后的BASE64编码的字符串/returns
Public Function Encrypt(sourceString As String) As String
Dim btKey As Byte() = Encoding.Default.GetBytes(key)
Dim btIV As Byte() = Encoding.Default.GetBytes(iv)
Dim des As New DESCryptoServiceProvider()
Dim ms As New MemoryStream()
Try
Dim inData As Byte() = Encoding.Default.GetBytes(sourceString)
Try
Dim cs As New CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write)
Try
cs.Write(inData, 0, inData.Length)
cs.FlushFinalBlock()
Finally
cs.Dispose()
End Try
Return Convert.ToBase64String(ms.ToArray())
Catch
End Try
Finally
ms.Dispose()
End Try
End Function 'Encrypt
'/ summary
'/ 对DES加密后的字符串进行解密
'/ /summary
'/ param name="encryptedString"待解密的字符串/param
'/ returns解密后的字符串/returns
Public Function Decrypt(encryptedString As String) As String
Dim btKey As Byte() = Encoding.Default.GetBytes(key)
Dim btIV As Byte() = Encoding.Default.GetBytes(iv)
Dim des As New DESCryptoServiceProvider()
Dim ms As New MemoryStream()
Try
Dim inData As Byte() = Convert.FromBase64String(encryptedString)
Try
Dim cs As New CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write)
Try
cs.Write(inData, 0, inData.Length)
cs.FlushFinalBlock()
Finally
cs.Dispose()
End Try
Return Encoding.Default.GetString(ms.ToArray())
Catch
End Try
Finally
ms.Dispose()
End Try
End Function 'Decrypt
'/ summary
'/ 对文件内容进行DES加密
'/ /summary
'/ param name="sourceFile"待加密的文件绝对路径/param
'/ param name="destFile"加密后的文件保存的绝对路径/param
Overloads Public Sub EncryptFile(sourceFile As String, destFile As String)
If Not File.Exists(sourceFile) Then
Throw New FileNotFoundException("指定的文件路径不存在!", sourceFile)
End If
Dim btKey As Byte() = Encoding.Default.GetBytes(key)
Dim btIV As Byte() = Encoding.Default.GetBytes(iv)
Dim des As New DESCryptoServiceProvider()
Dim btFile As Byte() = File.ReadAllBytes(sourceFile)
Dim fs As New FileStream(destFile, FileMode.Create, FileAccess.Write)
Try
Try
Dim cs As New CryptoStream(fs, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write)
Try
cs.Write(btFile, 0, btFile.Length)
cs.FlushFinalBlock()
Finally
cs.Dispose()
End Try
Catch
Finally
fs.Close()
End Try
Finally
fs.Dispose()
End Try
End Sub 'EncryptFile
'/ summary
'/ 对文件内容进行DES加密,加密后覆盖掉原来的文件
'/ /summary
'/ param name="sourceFile"待加密的文件的绝对路径/param
Overloads Public Sub EncryptFile(sourceFile As String)
EncryptFile(sourceFile, sourceFile)
End Sub 'EncryptFile
'/ summary
'/ 对文件内容进行DES解密
'/ /summary
'/ param name="sourceFile"待解密的文件绝对路径/param
'/ param name="destFile"解密后的文件保存的绝对路径/param
Overloads Public Sub DecryptFile(sourceFile As String, destFile As String)
If Not File.Exists(sourceFile) Then
Throw New FileNotFoundException("指定的文件路径不存在!", sourceFile)
End If
Dim btKey As Byte() = Encoding.Default.GetBytes(key)
Dim btIV As Byte() = Encoding.Default.GetBytes(iv)
Dim des As New DESCryptoServiceProvider()
Dim btFile As Byte() = File.ReadAllBytes(sourceFile)
Dim fs As New FileStream(destFile, FileMode.Create, FileAccess.Write)
Try
Try
Dim cs As New CryptoStream(fs, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write)
Try
cs.Write(btFile, 0, btFile.Length)
cs.FlushFinalBlock()
Finally
cs.Dispose()
End Try
Catch
Finally
fs.Close()
End Try
Finally
fs.Dispose()
End Try
End Sub 'DecryptFile
'/ summary
'/ 对文件内容进行DES解密,加密后覆盖掉原来的文件
'/ /summary
'/ param name="sourceFile"待解密的文件的绝对路径/param
Overloads Public Sub DecryptFile(sourceFile As String)
DecryptFile(sourceFile, sourceFile)
End Sub 'DecryptFile
End Class 'DES
End Namespace 'ZU14
对文本文件加密
Dim des As New ZU14.DES()
des.IV = "abcd哈哈笑"
des.Key = "必须八位"
'加密
des.EncryptFile("d:\a.txt", "d:\b.txt")
'解密
des.DecryptFile("d:\b.txt")