Imports System.Data.OleDb
Imports System.IO
Imports System.Security.Cryptography
Imports System.Text
Public Class Form1
Dim con As New OleDbConnection("provider=microsoft.jet.oledb.4.0;data source=db1.mdb")
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Dim db As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=db1.mdb")
'Dim rs As New OleDbDataAdapter()
'Dim da As New OleDbDataAdapter("select * from noop Where Name='" & Trim(TextBox1.Text) & "' and pass='" & Trim(TextBox1.Text) & "' ", db)
'MsgBox("تم الدخول الى النظام")
Using cm = New OleDbCommand("", con)
cm.CommandText = "select count(name) from noop where name=@name and pass=@pass"
cm.Parameters.AddWithValue("@name", TextBox1.Text)
cm.Parameters.AddWithValue("@pass", Encrypt(TextBox2.Text, "thekey")) 'يجب ان تكون حفظ كلمة المرور باستخدام هذا التشفير
If con.State = ConnectionState.Closed Then con.Open()
If cm.ExecuteScalar <= 0 Then
MsgBox("Nothing Found", MsgBoxStyle.Critical, "")
Else
MsgBox("Now Welcome Back", MsgBoxStyle.Information, "")
End If
End Using
End Sub
Public Function Encrypt(clearText As String, EncryptionKey As String) As String
' string EncryptionKey = "abc123";
Dim clearBytes As Byte() = Encoding.Unicode.GetBytes(clearText)
Using encryptor As Aes = Aes.Create()
Dim pdb As New Rfc2898DeriveBytes(EncryptionKey, New Byte() {&H49, &H76, &H61, &H6E, &H20, &H4D,
&H65, &H64, &H76, &H65, &H64, &H65,
&H76})
encryptor.Key = pdb.GetBytes(32)
encryptor.IV = pdb.GetBytes(16)
Using ms As New MemoryStream()
Using cs As New CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write)
cs.Write(clearBytes, 0, clearBytes.Length)
cs.Close()
End Using
clearText = Convert.ToBase64String(ms.ToArray())
End Using
End Using
Return clearText
End Function
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Using cm = New OleDbCommand("", con)
cm.CommandText = "insert into noop(name,pass) values(@name,@pass)"
cm.Parameters.AddWithValue("@name", TextBox1.Text)
cm.Parameters.AddWithValue("@pass", Encrypt(TextBox2.Text, "thekey")) 'يجب ان تكون حفظ كلمة المرور باستخدام هذا التشفير
If con.State = ConnectionState.Closed Then con.Open()
Try
cm.ExecuteNonQuery()
MsgBox("Saved!")
Catch ex As Exception
MsgBox(Err.Description, MsgBoxStyle.Critical, "")
End Try
End Using
End Sub
End Class
