FabInfra-Mirror/borepin
1
0
Fork 0
mirror of https://gitlab.com/fabinfra/fabaccess/borepin.git synced 2025-06-11 11:03:23 +02:00
Code Issues Packages Projects Releases Wiki Activity

BackUp

Browse Source
This commit is contained in:
TheJoKlLa
2020-10-06 15:59:53 +02:00
parent d601e9afb3
commit f5dffcec5b
5 changed files with 338 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
NFC/Crypto/CRC32.cs Normal file
View File

@ -0,0 +1,44 @@
using System;
namespace NFC.Crypto
{
public class CRC32
{
public byte[] Calculate(byte[] data)
{
UInt32 crc32 = 0xFFFFFFFF;
crc32 = Calculate(data, crc32);
return BitConverter.GetBytes(crc32);
}
public byte[] Calculate(byte[] cmd, byte[] data)
{
UInt32 crc32 = 0xFFFFFFFF;
crc32 = Calculate(cmd, crc32);
crc32 = Calculate(data, crc32);
return BitConverter.GetBytes(crc32);
}
public UInt32 Calculate(byte[] data, UInt32 crc32)
{
for (int i = 0; i < data.Length; i++)
{
crc32 ^= data[i];
for (int b = 0; b < 8; b++)
{
bool b_Bit = (crc32 & 0x01) > 0;
crc32 >>= 1;
if (b_Bit)
{
crc32 ^= 0xEDB88320;
}
}
}
return crc32;
}
}
}

213
NFC/NXP MIFARE DESFire/MIFARE_DESFire.cs
View File

@ -1,16 +1,13 @@
using NFC.Crypto;
using NFC.ISO7816_4;
using NFC.Mifare_DESFire.Enums;
using Org.BouncyCastle.Asn1.Crmf;
using PCSC.Iso7816;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
namespace NFC.Mifare_DESFire
{
public class MIFARE_DESFire
{
// Docs https://hackmd.io/qATu8uYdRnOC40aFrB9afg
@ -31,6 +28,9 @@ namespace NFC.Mifare_DESFire
/// ICard Implementation used to transmit APDUCommands and recive APDUResponses
/// </summary>
private ICard _Card;
public byte[] _SessionKey;
public byte[] _IV;
#endregion
#region Methods
@ -43,7 +43,7 @@ namespace NFC.Mifare_DESFire
byte[] key = new byte[size];
for (int i = 0; i < size; i++)
{
key.[i] = 0;
key[i] = 0;
}
return key;
@ -64,6 +64,63 @@ namespace NFC.Mifare_DESFire
}
public bool CheckKey(byte[] key)
{
try
{
GetKeyTypeDES(key);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// Key Types used for DESFire Cards
/// </summary>
public enum KeyType
{
/// <summary>
/// DES Key - 8 Byte - 64 Bit
/// </summary>
DES,
/// <summary>
/// Triple DES Key with two DES Keys - 16 Byte - 128 Bit
/// </summary>
TDES_2K,
/// <summary>
/// Triple DES Key with three DES Keys - 24 Byte - 192 Bit
/// </summary>
TDES_3K,
/// <summary>
/// AES Key - 16 Byte - 128 Bit
/// </summary>
AES
}
/// <summary>
/// Check the Key Length to get Type of DES/3DES Key
/// </summary>
public KeyType GetKeyTypeDES(byte[] key)
{
switch(key.Length)
{
case 8:
return KeyType.DES;
case 16:
return KeyType.TDES_2K;
case 24:
return KeyType.TDES_3K;
default:
throw new ArgumentException(string.Format("No valid DES/3DES Key Size({0})", key.Length));
}
}
#region Methods for Crypto Operation
/// <summary>
/// Return a copy of the last Block of data
@ -141,6 +198,23 @@ namespace NFC.Mifare_DESFire
return c;
}
public byte[] xor(byte[] a, byte[] b)
{
if(a.Length != b.Length)
{
throw new ArgumentException("Array are not same Length");
}
byte[] c = new byte[a.Length];
for(int i = 0; i < a.Length; i++)
{
c[i] = (byte)(a[i] ^ b[i]);
}
return c;
}
#endregion
#endregion
@ -192,7 +266,7 @@ namespace NFC.Mifare_DESFire
{
byte[] id_byte = BitConverter.GetBytes(aid);
APDUCommand cmd = new APDUCommand(IsoCase.Case3Short)
APDUCommand cmd = new APDUCommand(IsoCase.Case4Short)
{
CLA = 0x90,
INS = (byte)APDUInstructions.SELECT_APPLICATION,
@ -201,8 +275,7 @@ namespace NFC.Mifare_DESFire
id_byte[0],
id_byte[1],
id_byte[2]
},
Le = 0x00
}
};
APDUResponse response = _Card.Transmit(cmd);
@ -211,7 +284,76 @@ namespace NFC.Mifare_DESFire
}
#endregion
/// <summary>
/// Expand Array to Block Size
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public byte[] expandToBlockSize(byte[] data, int bocksize)
{
int diff = data.Length % bocksize;
if (diff == 0)
{
return data;
}
byte[] expand = new byte[data.Length + diff];
data.CopyTo(expand, 0);
for(int i = expand.Length - 1; i > data.Length - 1; i--)
{
expand[i] = 0x00;
}
return expand;
}
public void ChangeKeyDES(byte key_no, byte[] key_new, byte[] key_current)
{
if(!CheckKey(key_new))
{
throw new ArgumentException("key_new is invalid");
}
if (!CheckKey(key_current))
{
throw new ArgumentException("key_new is invalid");
}
if(GetKeyTypeDES(key_new) != GetKeyTypeDES(key_current))
{
throw new ArgumentException("key_new and key_current are not same KeyType");
}
byte[] keys_xor = xor(key_new, key_current);
keys_xor = concatenate(keys_xor, keys_xor);
CRC32 crc32 = new CRC32();
byte[] crc = crc32.Calculate(new byte[] { (byte)APDUInstructions.CHANGE_KEY, key_no }, keys_xor);
byte[] key_xor_crc = concatenate(keys_xor, crc);
byte[] key_xor_crc_block = expandToBlockSize(key_xor_crc, 8);
DES des = new DES();
byte[] key_xor_crc_block_enc = des.Encrypt(key_xor_crc_block, _SessionKey, _IV);
APDUCommand cmd = new APDUCommand(IsoCase.Case4Short)
{
CLA = 0x90,
INS = (byte)APDUInstructions.CHANGE_KEY,
Data = key_xor_crc_block_enc,
Le = 0x00
};
APDUResponse response = _Card.Transmit(cmd);
CheckAPDUResponse(response);
}
@ -302,6 +444,58 @@ namespace NFC.Mifare_DESFire
{
throw new Exception("PICC Challenge is not correct answered.");
}
_SessionKey = GenerateDESSesionKey(rndA, rndB);
_IV = GenerateDefaultKey(8);
}
private byte[] GenerateDESSesionKey(byte[] rndA, byte[] rndB)
{
byte[] sesssionkey = new byte[8];
for(int i = 0; i < sesssionkey.Length; i++)
{
if(i < 4)
{
sesssionkey[i] = rndA[i];
}
else
{
sesssionkey[i] = rndB[i - 4];
}
}
// Set Key Verion of Key to 0x55 to LSB
// TODO
byte[] key_version = SetKeyVersion(sesssionkey, 0x55);
return concatenate(key_version, key_version);
}
public byte[] SetKeyVersion(byte[] key, byte keyversion)
{
byte[] pow2 = new byte[]
{
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
};
byte[] new_key = new byte[key.Length];
key.CopyTo(new_key, 0);
for(int i = 0; i < 8; i++)
{
if((keyversion & pow2[i]) > 0)
{
new_key[i] = (byte)(new_key[5] | 0x01);
}
else
{
new_key[i] = (byte)(new_key[5] & 0x7F);
}
}
return new_key;
}
public void ChangeApplicationMasterKey(byte[] aPP_MasterKey)
@ -313,7 +507,7 @@ namespace NFC.Mifare_DESFire
/// Delete Application by ID
/// </summary>
/// <param name="id">3 Byte ID</param>
public APDUCommand DeleteApplication(UInt32 id)
public void DeleteApplication(UInt32 id)
{
byte[] id_byte = BitConverter.GetBytes(id);
@ -330,7 +524,8 @@ namespace NFC.Mifare_DESFire
Le = 0x00
};
return cmd;
APDUResponse response = _Card.Transmit(cmd);
CheckAPDUResponse(response);
}
public void ChangeApplicationKey(int v, byte[] aPP_Key_1)