private static void UsingPrivateKey(string inputFilePath, byte[] privateKey)
{
try
{
bool fileIsDirectory = FileHandling.IsDirectory(inputFilePath);
if (fileIsDirectory)
{
DirectoryEncryption.UsingPrivateKey(inputFilePath, privateKey);
return;
}
// Derive a unique KEK per file
(byte[] ephemeralSharedSecret, byte[] ephemeralPublicKey) = KeyExchange.GetPrivateKeySharedSecret(privateKey);
byte[] salt = Generate.Salt();
byte[] keyEncryptionKey = Generate.KeyEncryptionKey(ephemeralSharedSecret, salt);
string outputFilePath = GetOutputFilePath(inputFilePath);
EncryptFile.Initialize(inputFilePath, outputFilePath, ephemeralPublicKey, salt, keyEncryptionKey);
Utilities.ZeroArray(keyEncryptionKey);
EncryptionSuccessful(inputFilePath, outputFilePath);
}
catch (Exception ex) when(ExceptionFilters.FileAccess(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.Error);
DisplayMessage.FilePathException(inputFilePath, ex.GetType().Name, "Unable to encrypt the file.");
}
}
private static void UsingPrivateKey(string inputFilePath, byte[] privateKey)
{
try
{
bool fileIsDirectory = FileHandling.IsDirectory(inputFilePath);
if (fileIsDirectory)
{
DirectoryEncryption.UsingPrivateKey(inputFilePath, privateKey);
return;
}
// Derive a unique KEK per file
byte[] ephemeralSharedSecret = KeyExchange.GetPrivateKeySharedSecret(privateKey, out byte[] ephemeralPublicKey);
byte[] salt = Generate.Salt();
byte[] keyEncryptionKey = Generate.KeyEncryptionKey(ephemeralSharedSecret, salt);
string outputFilePath = GetOutputFilePath(inputFilePath);
EncryptFile.Initialize(inputFilePath, outputFilePath, ephemeralPublicKey, salt, keyEncryptionKey);
CryptographicOperations.ZeroMemory(keyEncryptionKey);
EncryptionSuccessful(inputFilePath, outputFilePath);
}
catch (Exception ex) when(ExceptionFilters.Cryptography(ex))
{
DisplayMessage.FilePathException(inputFilePath, ex.GetType().Name, "Unable to encrypt the file.");
}
}