public static char[] ConvertUserInput(bool encryption, char[] base64Key, char[] password)
{
try
{
NullChecks.CharArray(base64Key);
NullChecks.CharArray(password);
char[] message;
byte[] key = Convert.FromBase64CharArray(base64Key, 0, base64Key.Length);
if (encryption == true)
{
byte[] plaintext = Encoding.UTF8.GetBytes(password);
message = EncryptPassword(plaintext, key);
Utilities.ZeroArray(plaintext);
}
else
{
byte[] ciphertext = Convert.FromBase64CharArray(password, 0, password.Length);
message = DecryptPassword(ciphertext, key);
Utilities.ZeroArray(ciphertext);
}
Utilities.ZeroArray(key);
return(message);
}
catch (Exception ex) when(ex is FormatException || ex is EncoderFallbackException)
{
DisplayMessage.Error(ex.GetType().Name, "Invalid key or password format.");
return(Array.Empty <char>());
}
}
public static void CreateKeyfile(string filePath)
{
NullChecks.Strings(filePath);
const string keyfileExtension = ".key";
// Generate a random name if the path is a directory
if (Directory.Exists(filePath))
{
string randomFileName = AnonymousRename.GenerateRandomFileName() + keyfileExtension;
filePath = Path.Combine(filePath, randomFileName);
}
if (!File.Exists(filePath))
{
// Append .key extension if missing
if (!filePath.EndsWith(keyfileExtension, StringComparison.InvariantCulture))
{
filePath += keyfileExtension;
}
Keyfiles.GenerateKeyfile(filePath);
}
else
{
Console.WriteLine("Error: A file with this name already exists.");
}
}
public static void RestoreDirectoryName(string folderPath)
{
try
{
NullChecks.Strings(folderPath);
string anonymisedDirectoryName = Path.GetFileName(folderPath);
// Get the path where the original directory name is stored
string storageFileName = $"{anonymisedDirectoryName}.txt";
string storageFilePath = Path.Combine(folderPath, storageFileName);
if (File.Exists(storageFilePath))
{
string originalDirectoryName = File.ReadAllText(storageFilePath);
string originalDirectoryPath = folderPath.Replace(anonymisedDirectoryName, originalDirectoryName);
Directory.Move(folderPath, originalDirectoryPath);
storageFilePath = Path.Combine(originalDirectoryPath, storageFileName);
if (File.Exists(storageFilePath))
{
File.Delete(storageFilePath);
}
}
}
catch (Exception ex) when(ExceptionFilters.FileAccessExceptions(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.High);
DisplayMessage.Error(folderPath, ex.GetType().Name, "Unable to restore original directory name.");
}
}
public static void WriteHeaders(FileStream ciphertext, byte[] salt)
{
NullChecks.FileHeaders(ciphertext, salt);
byte[] memorySizeFlag = Encoding.UTF8.GetBytes(Constants.MemorySizeFlag + Invariant.ToString(Globals.MemorySize));
byte[] iterationsFlag = Encoding.UTF8.GetBytes(Constants.IterationsFlag + Invariant.ToString(Globals.Iterations));
byte[] endFlag = Encoding.UTF8.GetBytes(Constants.EndFlag);
ciphertext.Write(memorySizeFlag, 0, memorySizeFlag.Length);
ciphertext.Write(iterationsFlag, 0, iterationsFlag.Length);
ciphertext.Write(endFlag, 0, endFlag.Length);
ciphertext.Write(salt, 0, salt.Length);
}
public static string GetAnonymousFileName(string filePath)
{
try
{
NullChecks.Strings(filePath);
string originalFileName = Path.GetFileName(filePath);
string randomFileName = GenerateRandomFileName();
string anonymousFilePath = filePath.Replace(originalFileName, randomFileName);
return(anonymousFilePath);
}
catch (ArgumentException ex)
{
Logging.LogException(ex.ToString(), Logging.Severity.Bug);
DisplayMessage.Error(filePath, ex.GetType().Name, "Unable to get anonymous file name. This is a bug - please report it.");
return(filePath);
}
}
public static bool AppendHash(string filePath, byte[] fileHash)
{
try
{
NullChecks.ByteArray(fileHash);
using (var fileStream = new FileStream(filePath, FileMode.Append, FileAccess.Write, FileShare.Read, Constants.FileBufferSize, FileOptions.RandomAccess))
{
fileStream.Write(fileHash, 0, fileHash.Length);
}
return(true);
}
catch (Exception ex) when(ExceptionFilters.FileAccessExceptions(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.High);
DisplayMessage.Error(filePath, ex.GetType().Name, "Unable to append the MAC to the file. This data is required for decryption of the file.");
return(false);
}
}
public static void GetFilePaths(bool encryption, string[] filePaths, byte[] passwordBytes)
{
NullChecks.StringArray(filePaths);
Globals.SuccessfulCount = 0;
Globals.TotalCount = filePaths.Length;
foreach (string filePath in filePaths)
{
bool?fileIsDirectory = FileHandling.IsDirectory(filePath);
if (fileIsDirectory != null)
{
if (fileIsDirectory == false)
{
CallEncryption(encryption, filePath, passwordBytes);
}
else
{
DirectoryEncryption(encryption, filePath, passwordBytes);
}
}
}
}