public static GPKeySet Diversify(GPKeySet keys, byte[] diversification_data, Diversification mode, int scp)
{
try
{
GPKeySet result = new GPKeySet();
//Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
foreach (KeySessionType v in KeyTypeList.Values)
{
if (v == KeySessionType.RMAC)
{
continue;
}
byte[] kv = null;
// shift around and fill initialize update data as required.
if (mode == Diversification.VISA2)
{
kv = FillVisa(diversification_data, v);
}
else if (mode == Diversification.EMV)
{
kv = FillEmv(diversification_data, v);
}
// Encrypt with current master key
//cipher.init(Cipher.ENCRYPT_MODE, keys.getKey(v).getKey(Type.DES3));
//byte[] keybytes = cipher.doFinal(kv);
byte[] keybytes = GPCrypto.DoEncrypt_DES3_ECB(keys.GetKey(v).GetKey(KeyType.DES3).GetEncoded(), kv);
// Replace the key, possibly changing type. G&D SCE 6.0 uses EMV 3DES and resulting keys
// must be interpreted as AES-128
GPKey nk = new GPKey(keybytes, scp == 3 ? KeyType.AES : KeyType.DES3);
result.SetKey(v, nk);
}
return(result);
}
//catch (BadPaddingException e)
//{
// throw new Exception("Diversification failed.", e);
//}
//catch (InvalidKeyException e)
//{
// throw new Exception("Diversification failed.", e);
//}
//catch (IllegalBlockSizeException e)
//{
// throw new Exception("Diversification failed.", e);
//}
//catch (NoSuchAlgorithmException e)
//{
// throw new Exception("Diversification failed.", e);
//}
//catch (NoSuchPaddingException e)
//{
// throw new Exception("Diversification failed.", e);
//}
catch (Exception e)
{
throw new Exception("Diversification failed.", e);
}
}
private static byte[] Mac_des_3des(GPKey key, byte[] text, int offset, int length, byte[] iv)
{
if (length == -1)
{
length = text.Length - offset;
}
try
{
//Cipher cipher1 = Cipher.getInstance(DES_CBC_CIPHER);
//cipher1.init(Cipher.ENCRYPT_MODE, key.getKey(Type.DES), new IvParameterSpec(iv));
//Cipher cipher2 = Cipher.getInstance(DES3_CBC_CIPHER);
//cipher2.init(Cipher.ENCRYPT_MODE, key.getKey(Type.DES3), new IvParameterSpec(iv));
byte[] result = Arrays.Clone(iv);
byte[] temp;
if (length > 8)
{
temp = GPCrypto.DoEncrypt_DES_CBC(key.GetKey(KeyType.DES).GetEncoded(), text, offset, length - 8, iv);
Array.Copy(temp, temp.Length - 8, result, 0, 8);
}
temp = GPCrypto.DoEncrypt_DES3_CBC(key.GetKey(KeyType.DES3).GetEncoded(), text, (offset + length) - 8, 8, result);
Array.Copy(temp, temp.Length - 8, result, 0, 8);
return(result);
}
catch (Exception e)
{
//e.printStackTrace();
throw new Exception("MAC computation failed.", e);
}
}
public static GPPlaintextKeys FromMasterKey(GPKey master, Diversification div)
{
GPKeySet ks = new GPKeySet(master);
GPPlaintextKeys p = new GPPlaintextKeys(ks, div)
{
master = master
};
return(p);
}
public void AuthWithCard(byte[] mk, byte[] hostChallenge = null)
{
GPKey kmc = new GPKey(mk, KeyType.DES3);
GPPlaintextKeys gpptk = GPPlaintextKeys.FromMasterKey(kmc, Diversification.VISA2);
gp.OpenSecureChannel(gpptk, new List <APDUMode>()
{
APDUMode.CLR
}, hostChallenge);
}
private GPKeySet DeriveSessionKeysSCP01(GPKeySet staticKeys, byte[] host_challenge, byte[] card_challenge)
{
GPKeySet sessionKeys = new GPKeySet();
byte[] derivationData = new byte[16];
Array.Copy(card_challenge, 4, derivationData, 0, 4);
Array.Copy(host_challenge, 0, derivationData, 4, 4);
Array.Copy(card_challenge, 0, derivationData, 8, 4);
Array.Copy(host_challenge, 4, derivationData, 12, 4);
try
{
//Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
foreach (KeySessionType v in KeyTypeList.Values)
{
if (v == KeySessionType.RMAC) // skip RMAC key
{
continue;
}
//cipher.init(Cipher.ENCRYPT_MODE, staticKeys.getKeyFor(v));
//GPKey nk = new GPKey(cipher.doFinal(derivationData), Type.DES3);
byte[] result = GPCrypto.DoEncrypt_DES3_ECB(staticKeys.GetKeyFor(v).GetEncoded(), derivationData);
GPKey nk = new GPKey(result, KeyType.DES3);
sessionKeys.SetKey(v, nk);
}
// KEK is the same
sessionKeys.SetKey(KeySessionType.KEK, staticKeys.GetKey(KeySessionType.KEK));
return(sessionKeys);
}
//catch (NoSuchAlgorithmException e)
//{
// throw new IllegalStateException("Session keys calculation failed.", e);
//}
//catch (NoSuchPaddingException e)
//{
// throw new IllegalStateException("Session keys calculation failed.", e);
//}
//catch (InvalidKeyException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
//catch (IllegalBlockSizeException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
//catch (BadPaddingException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
catch (Exception e)
{
throw new Exception("Session keys calculation failed.", e);
}
}
private static byte[] Scp03_key_check_value(GPKey key)
{
try
{
byte[] cv = GPCrypto.DoEncrypt_AES_CBC(key.GetKey().GetEncoded(), GPCrypto.one_bytes_16);
//Cipher c = Cipher.getInstance(AES_CBC_CIPHER);
//c.init(Cipher.ENCRYPT_MODE, key.getKey(), iv_null_aes);
//byte[] cv = c.doFinal(one_bytes_16);
return(Arrays.CopyOfRange(cv, 0, 3));
}
catch (Exception e)
{
throw new Exception("Could not calculate key check value: ", e);
}
}
//public static IvParameterSpec iv_null_des = new IvParameterSpec(null_bytes_8);
//public static IvParameterSpec iv_null_aes = new IvParameterSpec(null_bytes_16);
public static byte[] Kcv_3des(GPKey key)
{
try
{
byte[] check = DoEncrypt_DES3_ECB(key.GetKey().GetEncoded(), null_bytes_8);
//Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
//cipher.init(Cipher.ENCRYPT_MODE, key.getKey());
//byte check[] = cipher.doFinal(GPCrypto.null_bytes_8);
return(Arrays.CopyOf(check, 3));
}
catch (Exception e)
{
throw new Exception("Could not calculate KCV", e);
}
}
private static byte[] Scp03_encrypt_key(GPKey kek, GPKey key)
{
try
{
// Pad with random
int n = key.GetLength() % 16 + 1;
byte[] plaintext = new byte[n * 16];
SecureRandom sr = new SecureRandom();
sr.NextBytes(plaintext);
Array.Copy(key.GetValue(), 0, plaintext, 0, key.GetValue().Length);
// encrypt
byte[] cgram = GPCrypto.DoEncrypt_AES_CBC(kek.GetValue(), plaintext);
//Cipher c = Cipher.getInstance(AES_CBC_CIPHER);
//c.init(Cipher.ENCRYPT_MODE, kek.GetEncoded(), null_bytes_16);
//byte[] cgram = c.doFinal(plaintext);
return(cgram);
}
catch (Exception e)
{
throw new Exception("Could not calculate key check value: ", e);
}
}
private GPKeySet DeriveSessionKeysSCP02(GPKeySet staticKeys, byte[] sequence, bool implicitChannel)
{
GPKeySet sessionKeys = new GPKeySet();
try
{
//Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding");
byte[] derivationData = new byte[16];
Array.Copy(sequence, 0, derivationData, 2, 2);
byte[] constantMAC = new byte[] { (byte)0x01, (byte)0x01 };
Array.Copy(constantMAC, 0, derivationData, 0, 2);
//cipher.init(Cipher.ENCRYPT_MODE, staticKeys.getKeyFor(KeySessionType.MAC), GPCrypto.iv_null_des);
//GPKey nk = new GPKey(cipher.doFinal(derivationData), Type.DES3);
byte[] result = GPCrypto.DoEncrypt_DES3_CBC(staticKeys.GetKeyFor(KeySessionType.MAC).GetEncoded(), derivationData);
GPKey nk = new GPKey(result, KeyType.DES3);
sessionKeys.SetKey(KeySessionType.MAC, nk);
// TODO: is this correct? - increment by one for all other than C-MAC
if (implicitChannel)
{
Buffer_increment(derivationData, 2, 2);
}
byte[] constantRMAC = new byte[] { (byte)0x01, (byte)0x02 };
Array.Copy(constantRMAC, 0, derivationData, 0, 2);
//cipher.init(Cipher.ENCRYPT_MODE, staticKeys.getKeyFor(KeySessionType.MAC), GPCrypto.iv_null_des);
//nk = new GPKey(cipher.doFinal(derivationData), Type.DES3);
byte[] result2 = GPCrypto.DoEncrypt_DES3_CBC(staticKeys.GetKeyFor(KeySessionType.MAC).GetEncoded(), derivationData);
nk = new GPKey(result2, KeyType.DES3);
sessionKeys.SetKey(KeySessionType.RMAC, nk);
byte[] constantENC = new byte[] { (byte)0x01, (byte)0x82 };
Array.Copy(constantENC, 0, derivationData, 0, 2);
//cipher.init(Cipher.ENCRYPT_MODE, staticKeys.getKeyFor(KeySessionType.ENC), GPCrypto.iv_null_des);
//nk = new GPKey(cipher.doFinal(derivationData), Type.DES3);
byte[] result3 = GPCrypto.DoEncrypt_DES3_CBC(staticKeys.GetKeyFor(KeySessionType.ENC).GetEncoded(), derivationData);
nk = new GPKey(result3, KeyType.DES3);
sessionKeys.SetKey(KeySessionType.ENC, nk);
byte[] constantDEK = new byte[] { (byte)0x01, (byte)0x81 };
Array.Copy(constantDEK, 0, derivationData, 0, 2);
//cipher.init(Cipher.ENCRYPT_MODE, staticKeys.getKeyFor(KeySessionType.KEK), GPCrypto.iv_null_des);
//nk = new GPKey(cipher.doFinal(derivationData), Type.DES3);
byte[] result4 = GPCrypto.DoEncrypt_DES3_CBC(staticKeys.GetKeyFor(KeySessionType.KEK).GetEncoded(), derivationData);
nk = new GPKey(result4, KeyType.DES3);
sessionKeys.SetKey(KeySessionType.KEK, nk);
return(sessionKeys);
}
//catch (NoSuchAlgorithmException e)
//{
// throw new IllegalStateException("Session keys calculation failed.", e);
//}
//catch (NoSuchPaddingException e)
//{
// throw new IllegalStateException("Session keys calculation failed.", e);
//}
//catch (InvalidKeyException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
//catch (IllegalBlockSizeException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
//catch (BadPaddingException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
//catch (InvalidAlgorithmParameterException e)
//{
// throw new RuntimeException("Session keys calculation failed.", e);
//}
catch (Exception e)
{
throw new Exception("Session keys calculation failed.", e);
}
}
public static GPPlaintextKeys FromMasterKey(GPKey master)
{
return(FromMasterKey(master, Diversification.NONE));
}
public void SetKey(KeySessionType type, GPKey k)
{
keys.Add(type, k);
}
public GPKeySet(GPKey master)
{
keys.Add(KeySessionType.ENC, master);
keys.Add(KeySessionType.MAC, master);
keys.Add(KeySessionType.KEK, master);
}
// SCP03 related
private static byte[] Scp03_mac(GPKey key, byte[] msg, int lengthbits)
{
return(Scp03_mac(key.GetValue(), msg, lengthbits));
}
// GP 2.2.1 Amendment D v 1.1.1
public static byte[] Scp03_kdf(GPKey key, byte constant, byte[] context, int blocklen_bits)
{
return(Scp03_kdf(key.GetValue(), constant, context, blocklen_bits));
}
private static byte[] Mac_des_3des(GPKey key, byte[] text, byte[] iv)
{
byte[] d = Pad80(text, 8);
return(Mac_des_3des(key, d, 0, d.Length, iv));
}
public static byte[] Mac_3des_nulliv(GPKey key, byte[] d)
{
return(Mac_3des(key, d, GPCrypto.null_bytes_8));
}