private static void PerformEncrypt(CommandLineParameters parameters, EncryptionManager encryptionManager, System.IO.FileStream stream)
{
var unencrypted = new byte[stream.Length];
stream.Read(unencrypted, 0, unencrypted.Length);
if(parameters.IsVerbose)
{
Console.WriteLine($"Encrypting {stream.Length} bytes");
}
var encryptedBytes = encryptionManager.EncryptToBytes(unencrypted);
if(System.IO.File.Exists(parameters.Destination))
{
if (parameters.IsVerbose)
{
Console.WriteLine($"Deleting {parameters.Destination}");
}
System.IO.File.Delete(parameters.Destination);
}
using (var writeStream = System.IO.File.OpenWrite(parameters.Destination))
{
writeStream.Write(encryptedBytes, 0, encryptedBytes.Length);
if (parameters.IsVerbose)
{
Console.WriteLine($"Encrypted {encryptedBytes.Length} bytes");
}
}
}
private static void PerformEncrypt(CommandLineParameters parameters, EncryptionManager encryptionManager, System.IO.FileStream stream)
{
var unencrypted = new byte[stream.Length];
stream.Read(unencrypted, 0, unencrypted.Length);
if (parameters.IsVerbose)
{
Console.WriteLine($"Encrypting {stream.Length} bytes");
}
var encryptedBytes = encryptionManager.EncryptToBytes(unencrypted);
if (System.IO.File.Exists(parameters.Destination))
{
if (parameters.IsVerbose)
{
Console.WriteLine($"Deleting {parameters.Destination}");
}
System.IO.File.Delete(parameters.Destination);
}
using (var writeStream = System.IO.File.OpenWrite(parameters.Destination))
{
writeStream.Write(encryptedBytes, 0, encryptedBytes.Length);
if (parameters.IsVerbose)
{
Console.WriteLine($"Encrypted {encryptedBytes.Length} bytes");
}
}
}
static void Main(string[] args)
{
var response = CommandLineParameters.ValidateArgs(args);
if (response.Succeeded == false)
{
System.Console.Error.WriteLine(response.Message);
}
else
{
var parameters = CommandLineParameters.Create(args);
EncryptionManager encryptionManager = new EncryptionManager();
encryptionManager.InitialVector = parameters.InitialVector;
encryptionManager.EncryptionKey = parameters.EncryptionKey;
using (var stream = System.IO.File.OpenRead(parameters.Source))
{
if (parameters.IsDecrypting)
{
PerformDecrypt(parameters, encryptionManager, stream);
}
else
{
PerformEncrypt(parameters, encryptionManager, stream);
}
}
}
}
private static void PerformDecrypt(CommandLineParameters parameters, EncryptionManager encryptionManager, System.IO.FileStream stream)
{
long amountToRead = stream.Length;
var encrypted = new byte[amountToRead ];
stream.Read(encrypted, 0, encrypted.Length);
var decrypted = encryptionManager.DecryptFromBytes(encrypted);
System.IO.File.WriteAllBytes(parameters.Destination, decrypted);
}
private static void PerformDecrypt(CommandLineParameters parameters, EncryptionManager encryptionManager, System.IO.FileStream stream)
{
long amountToRead = stream.Length;
var encrypted = new byte[amountToRead];
stream.Read(encrypted, 0, encrypted.Length);
var decrypted = encryptionManager.DecryptFromBytes(encrypted);
System.IO.File.WriteAllBytes(parameters.Destination, decrypted);
}
private static void ProcessOptionalParameter(string parameter, CommandLineParameters parametersObject)
{
switch (parameter.ToLowerInvariant())
{
case "encrypt":
parametersObject.IsDecrypting = false;
break;
case "decrypt":
parametersObject.IsDecrypting = true;
break;
case "-v":
parametersObject.IsVerbose = true;
break;
default:
// do anything?
break;
}
}
public static CommandLineParameters Create(string[] args)
{
CommandLineParameters toReturn = new CommandLineParameters();
toReturn.Source = args[0];
toReturn.Destination = args[1];
toReturn.EncryptionKey = args[2];
toReturn.InitialVector = args[3];
if (args.Length > 4)
{
for (int i = 4; i < args.Length; i++)
{
ProcessOptionalParameter(args[i], toReturn);
}
}
return(toReturn);
}
public static CommandLineParameters Create(string[] args)
{
CommandLineParameters toReturn = new CommandLineParameters();
toReturn.Source = args[0];
toReturn.Destination = args[1];
toReturn.EncryptionKey = args[2];
toReturn.InitialVector = args[3];
if(args.Length > 4)
{
for(int i = 4; i < args.Length; i++)
{
ProcessOptionalParameter(args[i], toReturn);
}
}
return toReturn;
}
private static void ProcessOptionalParameter(string parameter, CommandLineParameters parametersObject)
{
switch (parameter.ToLowerInvariant())
{
case "encrypt":
parametersObject.IsDecrypting = false;
break;
case "decrypt":
parametersObject.IsDecrypting = true;
break;
case "-v":
parametersObject.IsVerbose = true;
break;
default:
// do anything?
break;
}
}
