static void IsInforequired()
{
if (TypesOfParameters.Contains("/?"))
{
InformationScreen();
}
}
static bool CheckValidParameters_d_v()
{
if (TypesOfParameters.Contains("/d") && TypesOfParameters.Contains("/v"))
{
Console.WriteLine("Invalid parameter {0}", "/v");
return(false);
}
return(true);
}
static bool CheckKey()
{
if (!TypesOfParameters.Contains("/k"))
{
Console.WriteLine("Key not specified");
return(false);
}
bool isHex = Regex.IsMatch(Key, "^[0-9a-fA-F]+$");
if (!isHex)
{
Console.WriteLine("Invalid key format");
return(false);
}
return(true);
}
static void Main(string[] args)
{
if (!CheckFirstInput(args))
{
return;
}
if (!FileExists(args[0]))
{
return;
}
FileInput = args[0];
byte[] fileContent = null;
if (!SetAndCheckParameters(args))
{
return;
}
IsInforequired();
if (!CheckKey())
{
return;
}
if (!CheckValidParameters_d_v())
{
return;
}
try
{
fileContent = File.ReadAllBytes(FileInput);
}
catch (IOException)
{
Console.WriteLine("Operation failed");
return;
}
long fileLength = GetLength(fileContent);
fileContent = Normalize(fileContent);
byte[] finalValue = null;
bool encrypted = false;
if (!TypesOfParameters.Contains("/d"))
{
if (TypesOfParameters.Contains("/v"))
{
finalValue = EncryptWithCRC(fileContent, fileLength);
encrypted = true;
}
else
{
finalValue = EncryptWithoutCRC(fileContent);
encrypted = true;
}
if (TypesOfParameters.Contains("/o") && encrypted)
{
if (!FileFill(FileOutput, finalValue))
{
return;
}
else if (!FileExists(FileOutput))
{
return;
}
}
else if (encrypted)
{
if (!FileCreateAndFillEncryption(finalValue))
{
return;
}
}
}
else
{
finalValue = Decryption(fileContent);
if (BytesArrayIsZero(finalValue))
{
return;
}
else
{
if (TypesOfParameters.Contains("/o"))
{
if (!FileFill(FileOutput, finalValue))
{
return;
}
else if (!FileExists(FileOutput))
{
return;
}
}
else
{
if (!FileCreateAndFillDecryption(finalValue))
{
return;
}
}
}
}
Console.WriteLine("Operation successful! ");
Console.ReadKey();
}