/// <summary>
/// Applies full triple DES MAC as defined in [ISO 9797-1] as MAC Algorithm 1 with output transformation 1,
/// without truncation, and withtriple DES taking the place of the block cipher.
/// See Global Platform 2.1.1 Card Spec Section B.1.2.1
/// </summary>
/// <param name="key">3DES key</param>
/// <param name="iv">Initial Vector</param>
/// <param name="data">Data to MAC</param>
/// <returns>Full triple DES MAC</returns>
public static byte[] FullTripleDESMAC(Key key, byte[] iv, byte[] data)
{
byte[] enc = TripleDESCBC(new Key(key.BuildTripleDesKey()), iv, data, MODE_ENCRYPT);
byte[] result = new byte[8];
Array.Copy(enc, enc.Length - 8, result, 0, 8);
return(result);
}
/// <summary>
/// Applies full triple DES MAC as defined in [ISO 9797-1] as MAC Algorithm 1 with output transformation 1,
/// without truncation, and withtriple DES taking the place of the block cipher.
/// See Global Platform 2.1.1 Card Spec Section B.1.2.1
/// </summary>
/// <param name="key">3DES key</param>
/// <param name="iv">Initial Vector</param>
/// <param name="data">Data to MAC</param>
/// <returns>Full triple DES MAC</returns>
public static byte[] FullTripleDESMAC(Key key, byte[] iv, byte[] data)
{
byte[] enc = TripleDESCBC(new Key(key.BuildTripleDesKey()), iv, data, MODE_ENCRYPT);
byte[] result = new byte[8];
Array.Copy(enc, enc.Length - 8, result, 0, 8);
return result;
}
private byte[] EncodeKeyData(Key key, Key kek, bool addKCV, int keyFormat)
{
MemoryStream keyData = new MemoryStream();
if (keyFormat == KEY_FORMAT_1)
{
// Key encryption algorithm
keyData.WriteByte(CryptoUtil.ALG_DES);
// Encrypted key data length
keyData.WriteByte(0x10);
byte[] encryptedKey = CryptoUtil.TripleDESECB(kek, key.Value, CryptoUtil.MODE_ENCRYPT);
keyData.Write(encryptedKey, 0, encryptedKey.Length);
if (addKCV)
{
// KCV length
keyData.WriteByte(0x03);
// Calculate KCV
byte[] kcv = CryptoUtil.TripleDESECB(new Key(key.BuildTripleDesKey()),
CryptoUtil.BINARY_ZEROS_8_BYTE_BLOCK,
CryptoUtil.MODE_ENCRYPT);
keyData.Write(kcv, 0, 3);
}
else
{
keyData.WriteByte(0x00);
}
}
return(keyData.ToArray());
}
/// <summary>
/// Applies Retail MAC as defined in [ISO 9797-1] as MAC Algorithm 1 with output
/// transformation 3, without truncation, and withDES taking the place of the block cipher.
/// </summary>
/// <param name="key">Key</param>
/// <param name="iv">Initial Vector</param>
/// <param name="data">Data to MAC</param>
/// <returns>Retial MAC</returns>
public static byte[] SingleDESFullTripleDESMAC(Key key, byte[] iv, byte[] data)
{
byte[] intermeidateResult;
byte[] result = new byte[8];
if (data.Length > 8)
{
intermeidateResult = DESCBC(new Key(key.BuildDesKey()), iv, SubArray(data, 0, data.Length - 8), MODE_ENCRYPT);
Array.Copy(intermeidateResult, intermeidateResult.Length - 8, result, 0, 8);
intermeidateResult = TripleDESCBC(new Key(key.BuildTripleDesKey()), result, SubArray(data, data.Length - 8, 8), MODE_ENCRYPT);
}
else
{
intermeidateResult = TripleDESCBC(new Key(key.BuildTripleDesKey()), iv, SubArray(data, data.Length - 8, 8), MODE_ENCRYPT);
}
Array.Copy(intermeidateResult, intermeidateResult.Length - 8, result, 0, 8);
return(result);
}
/// <summary>
/// Applies Retail MAC as defined in [ISO 9797-1] as MAC Algorithm 1 with output
/// transformation 3, without truncation, and withDES taking the place of the block cipher.
/// </summary>
/// <param name="key">Key</param>
/// <param name="iv">Initial Vector</param>
/// <param name="data">Data to MAC</param>
/// <returns>Retial MAC</returns>
public static byte[] SingleDESFullTripleDESMAC(Key key, byte[] iv, byte[] data)
{
byte[] intermeidateResult;
byte[] result = new byte[8];
if (data.Length > 8)
{
intermeidateResult = DESCBC(new Key(key.BuildDesKey()), iv, SubArray(data, 0, data.Length - 8), MODE_ENCRYPT);
Array.Copy(intermeidateResult, intermeidateResult.Length - 8, result, 0, 8);
intermeidateResult = TripleDESCBC(new Key(key.BuildTripleDesKey()), result, SubArray(data, data.Length - 8, 8), MODE_ENCRYPT);
}
else
{
intermeidateResult = TripleDESCBC(new Key(key.BuildTripleDesKey()), iv, SubArray(data, data.Length - 8, 8), MODE_ENCRYPT);
}
Array.Copy(intermeidateResult, intermeidateResult.Length - 8, result, 0, 8);
return result;
}
private byte[] EncodeKeyData(Key key, Key kek, bool addKCV, int keyFormat)
{
MemoryStream keyData = new MemoryStream();
if (keyFormat == KEY_FORMAT_1)
{
// Key encryption algorithm
keyData.WriteByte(CryptoUtil.ALG_DES);
// Encrypted key data length
keyData.WriteByte(0x10);
byte[] encryptedKey = CryptoUtil.TripleDESECB(kek, key.Value, CryptoUtil.MODE_ENCRYPT);
keyData.Write(encryptedKey, 0, encryptedKey.Length);
if (addKCV)
{
// KCV length
keyData.WriteByte(0x03);
// Calculate KCV
byte[] kcv = CryptoUtil.TripleDESECB(new Key(key.BuildTripleDesKey()),
CryptoUtil.BINARY_ZEROS_8_BYTE_BLOCK,
CryptoUtil.MODE_ENCRYPT);
keyData.Write(kcv, 0, 3);
}
else
{
keyData.WriteByte(0x00);
}
}
return keyData.ToArray();
}
