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  • Encrypt Passwords Using MD5

    Author: 2007-07-05 09:26:12 From:

    <%
    const TBL_LOGIN  = "users_table_name"
    const FLD_PASS  = "password_field_name"
    const DB_NAME   = "db_name"

    Dim dbconnection
    Set dbConnection = server.CreateObject("ADODB.Connection")

    Dim strConnection
    strConnection = "PROVIDER=Microsoft.Jet.OLEDB.4.0;" & _
    "Data Source=" & Server.MapPath(DB_NAME)

    dbConnection.ConnectionString = strConnection
    dbConnection.Open

    Dim RecordSet
    Set RecordSet = server.CreateObject("ADODB.Recordset")

    Dim SQL
    SQL = "SELECT * FROM " & TBL_LOGIN

    RecordSet.open SQL , dbConnection,1,2

    total=0
    enc=0
    doencrypt=false

    if Request("do")="encrypt" then doencrypt=true

    do  until RecordSet.eof
      if doencrypt then
        total=total+1
     
        if not encrypted(RecordSet(FLD_PASS)) then
          RecordSet(FLD_PASS)=md5(RecordSet(FLD_PASS))
          RecordSet.Update
        end if
     
        enc=enc+1
     
    else
      total=total+1
      if encrypted(RecordSet(FLD_PASS)) then
        enc=enc+1
      end if
     
      RecordSet.MoveNext
    loop

    Recordset.Close
    Set Recordset=Nothing
    dbconnection.Close
    Set dbconnection=Nothing

    function encrypted(str)
    if len(str)<>32 then
      encrypted=false
      exit function
     end if
     
     dim i
     for i=1 to 32
       c = asc(mid(str,i,1))
       if (c<asc("0") and c>asc("9")) and (c<asc("a") or c>asc("f")) then
         encrypted=false
         exit function
      end if
     next

      encrypted=true

    end function
    %>

    <html>
    <head><title>Encrypt passwords</title></head>
    <body>
    Total passwords in the table - <%=total %><br>
    <% if enc=total and total>0 then %>
    All passwords are encrypted.
    <% elseif total>0 then %>
    Unencrypted - <%=(total-enc)%><br><br>
    Click "GO" to encrypt <%=(total-enc) %> passwords.<br>
    WARNING! There will be no way to decipher the passwords.<br>
    <input type=button value="GO" onclick="window.location='encrypt.asp?do=encrypt';">
    <% end if %>
    </body>
    </html>

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