6

我有一个在线 SMF 论坛，当用户注册时，密码在数据库中使用 SHA1 加密。我需要创建一个只有论坛成员才能登录的登录功能的 vb 程序。现在我陷入困境的部分是如何在 Visual Basic 中将密码加密为 SHA1？我包含了一些我不知道是否正确的代码，所以请帮助我。

Imports System.Security.Cryptography
Public Class Form2

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    ' declare those variables
    Dim password As String
    Dim passwordSHA As String

    password = txtPassword.Text ' give password the value of the password textbox

    Call passwordEncryptSHA(password) ' Lets call the first password encryption function for SHA1

    passwordSHA = passwordEncryptSHA(password) ' give the variable the returned SHA value

    ' finally we will display both values in the corresponding textboxes
    txtSHA1.Text = passwordSHA


End Sub
Public Function passwordEncryptSHA(ByVal password As String) As String
    Dim sha As New SHA1CryptoServiceProvider ' declare sha as a new SHA1CryptoServiceProvider
    Dim bytesToHash() As Byte ' and here is a byte variable

    bytesToHash = System.Text.Encoding.ASCII.GetBytes(password) ' covert the password into ASCII code

    bytesToHash = sha.ComputeHash(bytesToHash) ' this is where the magic starts and the encryption begins

    Dim encPassword As String = ""

    For Each b As Byte In bytesToHash
        encPassword += b.ToString("x2")
    Next

    Return encPassword ' boom there goes the encrypted password!

End Function

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

End Sub
End Class

谢谢，请不要吝啬，因为我还在学习（我 15 岁）！

4

2 回答 2

14 
Imports System.IO
Public Class Form1

Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
    If e.KeyValue = Keys.Enter Then
        TextBox2.Text = getSHA1Hash(TextBox1.Text)
        Label3.Text = TextBox2.Text.Length
    End If
End Sub

Function getSHA1Hash(ByVal strToHash As String) As String

    Dim sha1Obj As New Security.Cryptography.SHA1CryptoServiceProvider
    Dim bytesToHash() As Byte = System.Text.Encoding.ASCII.GetBytes(strToHash)

    bytesToHash = sha1Obj.ComputeHash(bytesToHash)

    Dim strResult As String = ""

    For Each b As Byte In bytesToHash
        strResult += b.ToString("x2")
    Next

    Return strResult

End Function

Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
    Dim fs As New FileStream("location.txt", FileMode.OpenOrCreate, FileAccess.Write)
    Dim sr As New StreamWriter(fs)
    fs.SetLength(0)
    sr.WriteLine(Me.Location.X)
    sr.WriteLine(Me.Location.Y)
    sr.Close()
    fs.Close()
End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    If File.Exists("location.txt") Then
        Dim fs As New FileStream("location.txt", FileMode.Open, FileAccess.Read)
        Dim sr As New StreamReader(fs)

        Me.Location = New Point(sr.ReadLine, sr.ReadLine)
        sr.Close()
        fs.Close()
    End If
End Sub

Private Sub TextBox1_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
    If e.KeyValue = Keys.Escape Then
        Application.Exit()
    End If
End Sub
End Class

在此处输入图像描述
所以:-)这是我为你创建的一个小程序，希望它有用，学习愉快。
提示：忽略额外的定位代码，这不过是一个懒惰的程序员的旧习惯......顺便说一句，哈希是一种方式，加密是两种方式（您可以先编码然后解密以获取相同的数据，但是您不能取消散列数据）。

于 2012-06-07T12:49:24.410 回答
0

未经测试！

如果你改变这个...

...

Dim encPassword As String = ""

For Each b As Byte In bytesToHash
   encPassword += b.ToString("x2")
下一个

...

对此

Dim encPassword As String = ""

encPassword = System.Text.Encoding.ASCII.GetString(bytesToHash);
于 2012-06-07T01:06:36.757 回答