Exemplo n.º 1
0
        private static void LANuncipherV1(string[] args, bool DEBUG)
        {
            //conversion des arguments
            string input_frame = args[3];

            byte[] kmacbytes = Hex2Bytes(args[4].Substring(0, 32));
            byte[] kencbytes = Hex2Bytes(args[5].Substring(0, 32));

            //décodage l6
            string l6 = input_frame.Substring(22, input_frame.Length - 26);

            string l6ctrl      = Convert.ToString(byte.Parse(l6.Substring(0, 2), System.Globalization.NumberStyles.HexNumber), 2).PadLeft(8, '0');
            string lblL6Vers   = l6ctrl.Substring(0, 3);
            string lblL6Wts    = l6ctrl.Substring(3, 1);
            string lblL6KeySel = l6ctrl.Substring(4, 4);
            //system.Console.WriteLine("Clé n° : " + Convert.ToInt32(lblL6KeySel.ToString(), 2).ToString());

            //Décodage trame
            int    cfield     = Int32.Parse(input_frame.Substring(2, 2), System.Globalization.NumberStyles.HexNumber);
            string lblCField  = cfield.ToString("X2");
            string lblMField  = input_frame.Substring(4, 4);
            string lblAField  = input_frame.Substring(8, 12);
            string lblClField = input_frame.Substring(20, 2);

            string lblL6OprID    = l6.Substring(2, 2);
            string lblL6Cpt      = l6.Substring(4, 4);
            string lblL6App      = l6.Substring(8, 2);
            string lblL6HashKmac = l6.Substring(l6.Length - 4, 4);

            if (CRC_OK(input_frame, DEBUG) && hashKmac_OK(input_frame, kmacbytes, lblL6Vers, DEBUG) && hashKenc_OK(input_frame, kencbytes, lblL6Vers, DEBUG))
            {
                string l7 = l6.Substring(10, l6.Length - 26);

                string txtIV = (lblMField.ToString() + lblAField.ToString() + lblL6Cpt.ToString() + lblCField.ToString()).PadRight(32, '0');

                byte[] l7decipheredbytes = CAES128.AES_CTR(Hex2Bytes(l7), kencbytes, Hex2Bytes(txtIV));
                string l7deciphered      = Bytes2Hex(l7decipheredbytes, l7decipheredbytes.Length);

                if (DEBUG)
                {
                    System.Console.WriteLine("IV: " + txtIV + Environment.NewLine + Environment.NewLine + "L7 ciphered: " + l7);
                }

                System.Console.WriteLine("L7 unciphered: " + l7deciphered);
            }

            else
            {
                System.Console.WriteLine("Frame unciphering error");
            }
        }
Exemplo n.º 2
0
        private static void NFCDATAcipher(string[] args, bool DEBUG)
        {
            string data = args[1];

            byte[] kencbytes = Hex2Bytes(args[2].Substring(0, 32));
            string IV        = (args[3].ToString().PadRight(32, '0'));

            //chiffrement
            byte[] DATAcipheredbytes = CAES128.AES_CTR(Hex2Bytes(data), kencbytes, Hex2Bytes(IV));
            string DATAciphered      = Bytes2Hex(DATAcipheredbytes, DATAcipheredbytes.Length);

            //System.Console.WriteLine("LAN L7 ciphered: " + l7ciphered);

            System.Console.WriteLine("CipheredData " + DATAciphered);
        }
Exemplo n.º 3
0
        private static void LANcipherV0(string[] args, bool DEBUG)
        {
            string lblL6Vers = args[2];
            string l7        = args[3];

            byte[] kencbytes = Hex2Bytes(args[4].Substring(0, 32));
            string lblMField = args[5];
            string lblAField = args[6];
            string lblL6Cpt  = args[7];
            string lblCField = args[8];

            string lblL6Wts    = "1";
            string lblL6KeySel = Convert.ToString(Convert.ToInt32(args[9], 10), 2).PadLeft(4, '0');
            string lblL6Ctrl   = Convert.ToInt32(lblL6Vers + lblL6Wts + lblL6KeySel, 2).ToString("X2");

            //System.Console.WriteLine("lblL6Ctrl  : " + lblL6Ctrl);
            //System.Console.WriteLine("l7: " + l7 + Environment.NewLine + "lblMField: " + lblMField + Environment.NewLine + "lblAField: " + lblAField + Environment.NewLine + "lblL6Cpt: " + lblL6Cpt + Environment.NewLine + "lblCField: " + lblCField + Environment.NewLine + "l7: " + l7 + Environment.NewLine);

            //IV
            string txtIV = (lblMField.ToString() + lblAField.ToString() + lblL6Cpt.ToString() + lblCField.ToString()).PadRight(32, '0');

            //System.Console.WriteLine("computed IV: " + txtIV);
            //chiffrement L7
            byte[] l7cipheredbytes = CAES128.AES_CTR(Hex2Bytes(l7), kencbytes, Hex2Bytes(txtIV));
            string l7ciphered      = Bytes2Hex(l7cipheredbytes, l7cipheredbytes.Length);
            //System.Console.WriteLine("LAN L7 ciphered: " + l7ciphered);


            string lblCIField = "B4";                                                                        // imposée par la LAN

            string lblL6HashKenc = "00000000";                                                               //recalcule après
            string lblL6Tstamp   = "0000";                                                                   //recalculé par le K
            string lblL6HashKmac = "0000";                                                                   //recalculé par le K
            string CRC           = "0000";                                                                   //recalculé par le K
            //L-field
            Int32  lfield_calc = 1 + 2 + 6 + 1 + 1 + 2 + l7.Length / 2 + 4 + lblL6Tstamp.Length / 2 + 2 + 2; // longeur de la trame du C-field au CRC inclu
            string lblLField   = lfield_calc.ToString("X2");

            lblL6HashKenc = Bytes2Hex(CAES128.AES_CMAC(Hex2Bytes(lblLField + lblCField + lblMField + lblAField + lblCIField + lblL6Ctrl + lblL6Cpt + l7ciphered), kencbytes), 4);
            //System.Console.WriteLine("lblL6HashKenc " + lblL6HashKenc);

            string L2 = lblLField + lblCField + lblMField + lblAField + lblCIField + lblL6Ctrl + lblL6Cpt + l7ciphered + lblL6HashKenc + lblL6Tstamp + lblL6HashKmac + CRC;

            System.Console.WriteLine("L2 " + L2);
        }
Exemplo n.º 4
0
        private static bool hashKenc_OK(string input_frame, byte[] kencbytes, string lblL6Vers, bool DEBUG)
        {
            //hashKenc de la trame
            string lblL6HashKenc;
            string Cencinput = "";


            if (lblL6Vers == "000")
            {
                string l6       = input_frame.Substring(22, input_frame.Length - 26);
                string l6ctrl   = Convert.ToString(byte.Parse(l6.Substring(0, 2), System.Globalization.NumberStyles.HexNumber), 2).PadLeft(8, '0');
                string lblL6Wts = l6ctrl.Substring(3, 1);

                if (DEBUG)
                {
                    System.Console.WriteLine(" l6 = " + l6 + " l6ctrl = " + l6ctrl + " lblL6Wts = " + lblL6Wts);
                }

                //si L6TStamp présent
                if (lblL6Wts.ToString() == "1")
                {
                    //lblL6TStamp = l6.Substring(l6.Length - 8, 4);
                    lblL6HashKenc = l6.Substring(l6.Length - 16, 8);
                    Cencinput     = input_frame.Substring(0, input_frame.Length - 20);
                }
                //si L6Tstamp absent
                else
                {
                    //lblL6TStamp = "";
                    lblL6HashKenc = l6.Substring(l6.Length - 12, 8);
                    Cencinput     = input_frame.Substring(0, input_frame.Length - 16);
                }

                // System.Console.WriteLine("Cencinput = " + Cencinput + " lblL6HashKenc = " + lblL6HashKenc);


                //calcul du hashKenc à partir de la trame
                byte[] Cencinputbytes        = Hex2Bytes(Cencinput);
                string lblL6HashKenccomputed = Bytes2Hex(CAES128.AES_CMAC(Cencinputbytes, kencbytes), 4);

                if (DEBUG)
                {
                    System.Console.WriteLine(Environment.NewLine + "full hashKenc computed = " + Bytes2Hex(CAES128.AES_CMAC(Cencinputbytes, kencbytes), 16));
                }

                if (lblL6HashKenccomputed.ToString().ToUpper() == lblL6HashKenc.ToString().ToUpper())
                {
                    if (DEBUG)
                    {
                        System.Console.WriteLine("hashKenc computed = " + lblL6HashKenccomputed + " hashKenc in frame = " + lblL6HashKenc + Environment.NewLine + "hashKenc OK" + Environment.NewLine);
                    }

                    return(true);
                }
                else
                {
                    System.Console.WriteLine("Error hashKenc: hashKenc computed = " + lblL6HashKenccomputed + " hashKenc in frame = " + lblL6HashKenc);
                    if (DEBUG)
                    {
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }
            else if (lblL6Vers == "001")
            {
                //calcul du hashKenc à partir de la trame
                lblL6HashKenc = input_frame.Substring(input_frame.Length - 20, 8);

                string L7 = input_frame.Substring(32, input_frame.Length - 52); //L7

                string lblMField = input_frame.Substring(4, 4);
                string lblAField = input_frame.Substring(8, 12);
                string lblL6Cpt  = input_frame.Substring(26, 4);

                string block0 = lblMField + lblAField + lblL6Cpt + "000000000000";

                Cencinput = block0 + L7;

                if (DEBUG)
                {
                    System.Console.WriteLine("full Cencinput in frame = " + Cencinput);
                }

                byte[] Cencinputbytes        = Hex2Bytes(Cencinput);
                string lblL6HashKenccomputed = Bytes2Hex(CAES128.AES_CMAC(Cencinputbytes, kencbytes), 4);

                if (DEBUG)
                {
                    System.Console.WriteLine("full hashKenc computed = " + Bytes2Hex(CAES128.AES_CMAC(Cencinputbytes, kencbytes), 16));
                }

                if (lblL6HashKenccomputed.ToString().ToUpper() == lblL6HashKenc.ToString().ToUpper())
                {
                    if (DEBUG)
                    {
                        System.Console.WriteLine("hashKenc computed = " + lblL6HashKenccomputed + " hashKenc in frame = " + lblL6HashKenc + Environment.NewLine + "hashKenc OK" + Environment.NewLine);
                    }

                    return(true);
                }
                else
                {
                    System.Console.WriteLine("Error hashKenc: hashKenc computed = " + lblL6HashKenccomputed + " hashKenc in frame = " + lblL6HashKenc);
                    if (DEBUG)
                    {
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }
            else
            {
                return(false);
            }
        }
Exemplo n.º 5
0
        private static bool hashKmac_OK(string input_frame, byte[] kmacbytes, string lblL6Vers, bool DEBUG)
        {
            //hashKmac de la trame
            string l6            = input_frame.Substring(22, input_frame.Length - 26);
            string lblL6HashKmac = l6.Substring(l6.Length - 4, 4);

            if (lblL6Vers == "000")
            {
                //calcul du hashKmac à partir de la trame
                string Cmacinput             = input_frame.Substring(0, input_frame.Length - 8);
                byte[] Cmacinputbytes        = Hex2Bytes(Cmacinput);
                string lblL6HashKmaccomputed = Bytes2Hex(CAES128.AES_CMAC(Cmacinputbytes, kmacbytes), 2);

                if (DEBUG)
                {
                    System.Console.WriteLine(Environment.NewLine + "full hashKmac computed = " + Bytes2Hex(CAES128.AES_CMAC(Cmacinputbytes, kmacbytes), 16));
                }

                if (lblL6HashKmaccomputed.ToString().ToUpper() == lblL6HashKmac.ToString().ToUpper())
                {
                    if (DEBUG)
                    {
                        System.Console.WriteLine("hashKmac computed = " + lblL6HashKmaccomputed + " hashKmac in frame = " + lblL6HashKmac + Environment.NewLine + "hashKmac OK");
                    }
                    return(true);
                }
                else
                {
                    System.Console.WriteLine("Error hashKmac: hashKmac computed = " + lblL6HashKmaccomputed + " hashKmac in frame = " + lblL6HashKmac);
                    if (DEBUG)
                    {
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }

            else if (lblL6Vers == "001")
            {
                //calcul du hashKmac à partir de la trame
                string lblMField = input_frame.Substring(4, 4);
                string lblAField = input_frame.Substring(8, 12);
                string block0    = lblMField + lblAField + "0000000000000000";

                string Cmacinput = block0 + l6.Substring(0, l6.Length - 4);

                if (DEBUG)
                {
                    System.Console.WriteLine("full Cmacinput in frame = " + Cmacinput);
                }

                byte[] Cmacinputbytes        = Hex2Bytes(Cmacinput);
                string lblL6HashKmaccomputed = Bytes2Hex(CAES128.AES_CMAC(Cmacinputbytes, kmacbytes), 2);

                if (DEBUG)
                {
                    System.Console.WriteLine(Environment.NewLine + "full hashKmac computed = " + Bytes2Hex(CAES128.AES_CMAC(Cmacinputbytes, kmacbytes), 16));
                }

                if (lblL6HashKmaccomputed.ToString().ToUpper() == lblL6HashKmac.ToString().ToUpper())
                {
                    if (DEBUG)
                    {
                        System.Console.WriteLine("hashKmac computed = " + lblL6HashKmaccomputed + " hashKmac in frame = " + lblL6HashKmac + Environment.NewLine + "hashKmac OK");
                    }
                    return(true);
                }
                else
                {
                    System.Console.WriteLine("Error hashKmac: hashKmac computed = " + lblL6HashKmaccomputed + " hashKmac in frame = " + lblL6HashKmac + Environment.NewLine);
                    if (DEBUG)
                    {
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }
            else
            {
                return(false);
            }
        }
Exemplo n.º 6
0
        private static void NFCuncipher(string[] args, bool DEBUG)
        {
            //input_NFCframe kmob NFCUid (8o)
            string input_NFCframe = args[2];

            byte[] kmobbytes = Hex2Bytes(args[3].Substring(0, 32));
            string NFCuid    = args[4];

            string NFCLfield   = input_NFCframe.Substring(0, 2);
            string NFCcpt      = input_NFCframe.Substring(2, 4);
            string NFCCfield   = input_NFCframe.Substring(6, 2);
            string NFCNFCver   = input_NFCframe.Substring(8, 2);
            string NFCdata     = input_NFCframe.Substring(10, input_NFCframe.Length - 22);
            string NFChashkmob = input_NFCframe.Substring(input_NFCframe.Length - 12, 8);
            string NFCCRC      = input_NFCframe.Substring(input_NFCframe.Length - 4, 4);

            /*
             * System.Console.WriteLine("NFCLfield " + NFCLfield);
             * System.Console.WriteLine("NFCcpt " + NFCcpt);
             * System.Console.WriteLine("NFCCfield " + NFCCfield);
             * System.Console.WriteLine("NFCNFCver " + NFCNFCver);
             * System.Console.WriteLine("NFCdata " + NFCdata);
             * System.Console.WriteLine("NFChashkmob " + NFChashkmob);
             * System.Console.WriteLine("NFCCRC " + NFCCRC);
             */

            //CRC vérification
            if (CRC_OK(input_NFCframe, DEBUG))
            {
                //hashKmob vérification
                string NFCinputhashkmob = (NFCuid.ToString() + NFCLfield.ToString() + NFCcpt.ToString() + NFCCfield.ToString() + NFCNFCver.ToString() + NFCdata.ToString());

                string NFChashkmobcomputed = Bytes2Hex(CAES128.AES_CMAC(Hex2Bytes(NFCinputhashkmob), kmobbytes), 4);
                if (DEBUG)
                {
                    System.Console.WriteLine("NFChashkmobcomputed " + NFChashkmobcomputed.ToString().ToUpper() + " NFChashkmob_inframe " + NFChashkmob);
                }


                if (NFChashkmobcomputed.ToString().ToUpper() == NFChashkmob)
                {
                    //déchiffrement
                    //calcul IV


                    string NFCIV = (NFCuid.ToString() + NFCcpt.ToString()).PadRight(32, '0');
                    if (DEBUG)
                    {
                        System.Console.WriteLine("NFCIV: " + NFCIV);
                    }


                    byte[] NFCdecipheredbytes = CAES128.AES_CTR(Hex2Bytes(NFCdata), kmobbytes, Hex2Bytes(NFCIV));
                    string NFCl7deciphered    = Bytes2Hex(NFCdecipheredbytes, NFCdecipheredbytes.Length);
                    System.Console.WriteLine("NFC L7: " + NFCl7deciphered);
                }
                else
                {
                    System.Console.WriteLine("Error HashKmob: HashKmob computed = " + NFChashkmobcomputed.ToString().ToUpper() + " HashKmob in frame = " + NFCinputhashkmob);
                }
            }
        }
Exemplo n.º 7
0
        private static void LANcipherV1(string[] args, bool DEBUG)
        {
            string lblCField  = args[8];
            string lblMField  = args[5];
            string lblAField  = args[6];
            string lblCIField = args[12]; //"B4";  imposée par la LAN


            string lblL6Vers   = args[2];
            string lblL6Wts    = "0"; //champs reserved du L6Ctrl fixé à 0
            string lblL6KeySel = Convert.ToString(Convert.ToInt32(args[9], 10), 2).PadLeft(4, '0');
            string lblL6Ctrl   = Convert.ToInt32(lblL6Vers + lblL6Wts + lblL6KeySel, 2).ToString("X2");

            string lblL6OprID = args[10];
            string lblL6Cpt   = args[7];
            string lblL6App   = args[11];

            string l7 = args[3];

            string lblL6HashKenc = "00000000"; //recalcule après
            string lblL6Tstamp   = args[13];
            //string lblL6Tstamp = "0000"; //recalculé par le K
            string lblL6HashKmac = "0000"; //recalculé par le K
            string CRC           = "0000"; //recalculé par le K

            byte[] kencbytes = Hex2Bytes(args[4].Substring(0, 32));
            byte[] kmacbytes = Hex2Bytes(args[14].Substring(0, 32));

            //System.Console.WriteLine("l7: " + l7 + Environment.NewLine + "lblMField: " + lblMField + Environment.NewLine + "lblAField: " + lblAField + Environment.NewLine + "lblL6Cpt: " + lblL6Cpt + Environment.NewLine + "lblCField: " + lblCField + Environment.NewLine + "l7: " + l7 + Environment.NewLine);

            //IV
            string txtIV = (lblMField.ToString() + lblAField.ToString() + lblL6Cpt.ToString() + lblCField.ToString()).PadRight(32, '0');

            if (DEBUG)
            {
                System.Console.WriteLine("computed IV: " + txtIV);
            }

            //chiffrement L7
            byte[] l7cipheredbytes = CAES128.AES_CTR(Hex2Bytes(l7), kencbytes, Hex2Bytes(txtIV));
            string l7ciphered      = Bytes2Hex(l7cipheredbytes, l7cipheredbytes.Length);

            if (DEBUG)
            {
                System.Console.WriteLine("LAN L7 ciphered: " + l7ciphered);
            }


            //L-field
            Int32  lfield_calc = 1 + 2 + 6 + 1 + 1 + 1 + 2 + 1 + l7.Length / 2 + 4 + lblL6Tstamp.Length / 2 + 2 + 2; // longeur de la trame du C-field au CRC inclu
            string lblLField   = lfield_calc.ToString("X2");

            //L6HashKenc
            string block0Kenc = lblMField + lblAField + lblL6Cpt + "000000000000";

            lblL6HashKenc = Bytes2Hex(CAES128.AES_CMAC(Hex2Bytes(block0Kenc + l7ciphered), kencbytes), 4);
            if (DEBUG)
            {
                System.Console.WriteLine("lblL6HashKenc " + lblL6HashKenc);
            }

            //L6HashKmac
            string HashKmacInput = lblL6Ctrl + lblL6OprID + lblL6Cpt + lblL6App + l7ciphered + lblL6HashKenc + lblL6Tstamp;
            string block0Kmac    = lblMField + lblAField + "0000000000000000";
            string Cmacinput     = block0Kmac + HashKmacInput;

            if (DEBUG)
            {
                System.Console.WriteLine("full Cmacinput  = " + Cmacinput);
            }
            byte[] Cmacinputbytes = Hex2Bytes(Cmacinput);
            lblL6HashKmac = Bytes2Hex(CAES128.AES_CMAC(Cmacinputbytes, kmacbytes), 2);
            if (DEBUG)
            {
                System.Console.WriteLine("lblL6HashKmac  = " + lblL6HashKmac);
            }

            //CRC
            string CRCinput = lblLField + lblCField + lblMField + lblAField + lblCIField + lblL6Ctrl + lblL6OprID + lblL6Cpt + lblL6App + l7ciphered + lblL6HashKenc + lblL6Tstamp + lblL6HashKmac;

            byte[] CRCinputbytes = Hex2Bytes(CRCinput);
            short  CRCcomputed   = CLibCRC.CalculateCRC16EN13757(CRCinputbytes);

            CRC = CRCcomputed.ToString("X2");
            if (DEBUG)
            {
                System.Console.WriteLine("CRC computed  = " + CRC);
            }

            string L2 = lblLField + lblCField + lblMField + lblAField + lblCIField + lblL6Ctrl + lblL6OprID + lblL6Cpt + lblL6App + l7ciphered + lblL6HashKenc + lblL6Tstamp + lblL6HashKmac + CRC;

            System.Console.WriteLine("L2 " + L2);
        }