D41D8CD98F00B204E9800998ECF8427E

Imports System.IO
Imports System.Security
Imports System.Security.Cryptography

Public Class Form1

    Function md5_hash(ByVal file_name As String)

        Return hash_generator("md5", file_name)

    End Function

    Function sha_1(ByVal file_name As String)

        Return hash_generator("sha1", file_name)

    End Function

    Function sha_256(ByVal file_name As String)

        Return hash_generator("sha256", file_name)

    End Function

    Function hash_generator(ByVal hash_type As String, ByVal file_name As String)

        Dim hash
        If hash_type.ToLower = "md5" Then

            hash = MD5.Create
        ElseIf hash_type.ToLower = "sha1" Then

            hash = SHA1.Create()
        ElseIf hash_type.ToLower = "sha256" Then

            hash = SHA256.Create()
        Else
            MsgBox("Type de hash inconnu : " & hash_type, MsgBoxStyle.Critical)
            Return False
        End If

        Dim hashValue() As Byte

        Dim fileStream As FileStream = File.OpenRead(file_name)

        fileStream.Position = 0

        hashValue = hash.ComputeHash(fileStream)

        Dim hash_hex = PrintByteArray(hashValue)

        fileStream.Close()

        Return hash_hex

    End Function

    Public Function PrintByteArray(ByVal array() As Byte)

        Dim hex_value As String = ""

        Dim i As Integer
        For i = 0 To array.Length - 1

            hex_value += array(i).ToString("X2")

        Next i

        Return hex_value

    End Function
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If OpenFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
            Dim path As String = OpenFileDialog1.FileName
            TextBox1.Text = path

            TextBox2.Text = md5_hash(path)
            TextBox3.Text = sha_1(path)
            TextBox4.Text = sha_256(path)
        End If
    End Sub
End Class


d41d8cd98f00b204e9800998ecf8427e

D41D8CD98F00B204E9800998ECF8427E


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