Bonjour,
comme ceci:
Imports System.Security.Cryptography
Imports System.IO
'http://www.aspsnippets.com/Articles/Encrypt-and-Decrypt-XML-File-using-C-and-VBNet.aspx
Public Class Form1
Private Shared Function Assign(Of T)(ByRef source As T, ByVal value As T) As T
source = value
Return value
End Function
Private Sub Encrypt(inputFilePath As String, outputfilePath As String)
Dim EncryptionKey As String = "MAKV2SPBNI99212"
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 fs As New FileStream(outputfilePath, FileMode.Create)
Using cs As New CryptoStream(fs, encryptor.CreateEncryptor(), CryptoStreamMode.Write)
Using fsInput As New FileStream(inputFilePath, FileMode.Open)
Dim data As Integer
While (Assign(data, fsInput.ReadByte())) <> -1
cs.WriteByte(CByte(data))
End While
End Using
End Using
End Using
End Using
End Sub
Private Sub Decrypt(inputFilePath As String, outputfilePath As String)
Dim EncryptionKey As String = "MAKV2SPBNI99212"
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 fs As New FileStream(inputFilePath, FileMode.Open)
Using cs As New CryptoStream(fs, encryptor.CreateDecryptor(), CryptoStreamMode.Read)
Using fsOutput As New FileStream(outputfilePath, FileMode.Create)
Dim data As Integer
While (Assign(data, cs.ReadByte())) <> -1
fsOutput.WriteByte(CByte(data))
End While
End Using
End Using
End Using
End Using
End Sub
' Encrypter
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Encrypt("C:\Users\LePivert\Documents\Logiciels\astlog\readme.txt", "C:\Users\LePivert\Documents\monfichiercode.txt")'adapter les chemins
End Sub
' Decrypter
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
Decrypt("C:\Users\LePivert\Documents\monfichiercode.txt", "C:\Users\LePivert\Documents\monfichierdecode.txt")'adapter les chemins
End Sub
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Button1.Text = "Crypter"
Button2.Text = "Decrypter"
End Sub
End Class