public static void EncryptFile(string inputFileName, string outputFileName, string algorithmName)
{
using (SymmetricAlgorithm algorithm = AlgorithmProvider.GetAlgorithm(algorithmName))
using (var inputFileStream = new FileStream(inputFileName, FileMode.Open, FileAccess.Read))
using (var outputFileStream = new FileStream(outputFileName, FileMode.OpenOrCreate, FileAccess.Write))
using (var cryptoStream = new CryptoStream(outputFileStream, algorithm.CreateEncryptor(), CryptoStreamMode.Write))
using (var streamWriter = new StreamWriter(KeyFileName))
{
inputFileStream.CopyTo(cryptoStream);
streamWriter.WriteLine(Convert.ToBase64String(algorithm.Key));
streamWriter.WriteLine(Convert.ToBase64String(algorithm.IV));
}
}
public static void DecryptFile(string inputFileName, string outputFileName, string keyFileName, string algorithmName)
{
using (SymmetricAlgorithm algorithm = AlgorithmProvider.GetAlgorithm(algorithmName))
{
using (var streamReader = new StreamReader(keyFileName))
{
algorithm.Key = Convert.FromBase64String(streamReader.ReadLine());
algorithm.IV = Convert.FromBase64String(streamReader.ReadLine());
}
using (var inputStreamFile = new FileStream(inputFileName, FileMode.Open, FileAccess.Read))
using (var cryptostream = new CryptoStream(inputStreamFile, algorithm.CreateDecryptor(), CryptoStreamMode.Read))
using (var outputStreamFile = new FileStream(outputFileName, FileMode.OpenOrCreate, FileAccess.Write))
{
cryptostream.CopyTo(outputStreamFile);
}
}
}
