public static string TripleDESEncryptVariant(HexKey key, string data)
{
if ((data == null) || ((data.Length != 32) && (data.Length != 48)))
{
throw new Exceptions.XInvalidData("Invalid data for 3DEncrypt with variant");
}
string result1;
string result2;
string result3 = "";
string orgKeyPartB;
if (data.Length == 32)
{
orgKeyPartB = key.PartB;
key.PartB = Utility.XORHexStrings(key.PartB, Cryptography.LMK.Variants.DoubleLengthVariant(1).PadRight(16, '0'));
result1 = TripleDESEncrypt(key, data.Substring(0, 16));
key.PartB = Utility.XORHexStringsFull(orgKeyPartB, Cryptography.LMK.Variants.DoubleLengthVariant(2).PadRight(16, '0'));
result2 = TripleDESEncrypt(key, data.Substring(16, 16));
}
else
{
orgKeyPartB = key.PartB;
key.PartB = Utility.XORHexStringsFull(key.PartB, Cryptography.LMK.Variants.TripleLengthVariant(1).PadRight(16, '0'));
result1 = TripleDESEncrypt(key, data.Substring(0, 16));
key.PartB = Utility.XORHexStringsFull(orgKeyPartB, Cryptography.LMK.Variants.TripleLengthVariant(2).PadRight(16, '0'));
result2 = TripleDESEncrypt(key, data.Substring(16, 16));
key.PartB = Utility.XORHexStringsFull(orgKeyPartB, Cryptography.LMK.Variants.TripleLengthVariant(3).PadRight(16, '0'));
result3 = TripleDESEncrypt(key, data.Substring(32, 16));
}
return(result1 + result2 + result3);
}
public static string TripleDESDecrypt(HexKey key, string data)
{
if ((data == null) || ((data.Length != 16) && (data.Length != 32) && (data.Length != 48)))
{
throw new Exceptions.XInvalidData("Invalid data for 3DEncrypt");
}
string result;
if (data.Length == 16)
{
result = TripleDESDecryptSingleLength(key, data);
}
else if (data.Length == 32)
{
result = TripleDESDecryptSingleLength(key, data.Substring(0, 16)) +
TripleDESDecryptSingleLength(key, data.Substring(16, 16));
}
else
{
result = TripleDESDecryptSingleLength(key, data.Substring(0, 16)) +
TripleDESDecryptSingleLength(key, data.Substring(16, 16)) +
TripleDESDecryptSingleLength(key, data.Substring(32, 16));
}
return(result);
}
private static string TripleDESDecryptSingleLength(HexKey key, string data)
{
string result = "";
result = DES.DESDecrypt(key.PartC, data);
result = DES.DESEncrypt(key.PartB, result);
result = DES.DESDecrypt(key.PartA, result);
return(result);
}
internal static string TripleDESEncrypt(HexKey hexKey, object zEROES)
{
throw new NotImplementedException();
}
