public string CryptolLoad(EncSettings settings)
{
string control = FileControl(settings);
if (!control.Contains("Code 05"))
{
return(control);
}
if (settings.Type == EncSettings.encType.Encrypt)
{
try
{
string result = EncryptFile(settings);
if (result.Contains("Code 01"))
{
return("Encryption Done! --> " + result);
}
else if (result.Contains("Code 00"))
{
return("Encryption Error! --> " + result);
}
}
catch (Exception ex)
{
return("Encryption Error --> " + ex.ToString());
}
}
else if (settings.Type == EncSettings.encType.Decrypt)
{
try
{
string result = DecryptFile(settings);
if (result.Contains("Code 01"))
{
return("Decryption Done! --> " + result);
}
else if (result.Contains("Code 00"))
{
return("Decryption Error! --> " + result);
}
}
catch (Exception ex)
{
return("Decryption Error --> " + ex.ToString());
}
}
return("Unknown Error!");
}
string FileControl(EncSettings settings)
{
if (!File.Exists(settings.inputFile))
{
return("Code 03: inputFile does not Exist! Stopping...");
}
if (File.Exists(settings.outputFile))
{
return("Code 04: outputFile already Exist! Please remove it before Encrypt/Decrypt. Stopping...");
}
if (settings.password == string.Empty || settings.password == null || settings.password == "")
{
return("Code 06: password is Empty! Please insert a password before Encrypt/Decrypt. Stopping...");
}
return("Code 05: FileControl passed!");
}
string EncryptFile(EncSettings settings)
{
long totalBytes = new FileInfo(settings.inputFile).Length;
byte[] salt = new byte[16];
rand.GetBytes(salt);
byte[] IV = new byte[16];
rand.GetBytes(IV);
byte[] key = new Rfc2898DeriveBytes(settings.password, salt, 77).GetBytes(32);
string cryptFile = settings.outputFile;
try
{
using (FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create))
{
fsCrypt.Write(salt, 0, salt.Length);
fsCrypt.Write(IV, 0, IV.Length);
using (RijndaelManaged RMCrypto = new RijndaelManaged())
{
using (CryptoStream cs = new CryptoStream(fsCrypt, RMCrypto.CreateEncryptor(key, IV), CryptoStreamMode.Write))
{
using (FileStream fsIn = new FileStream(settings.inputFile, FileMode.Open))
{
byte[] buffer = new byte[1024 * 1024];
int data;
long bytesRead = 0;
while ((data = fsIn.Read(buffer, 0, buffer.Length)) > 0)
{
bytesRead += data;
cs.Write(buffer, 0, data);
}
return("Code 01 : File successfully Encrypted!");
}
}
}
}
}
catch (Exception ex)
{
return("Code 00 : Error while Encrypting File " + ex.ToString());
}
}