private static void CreateEncryptFileFor(string aliasName, string fileName, string pubFileName, bool isBinary)
{
DHKeyPair _aliaskeys = RestoreKeys(aliasName);
PublicKey _publickeyto = RestorePublicKey(pubFileName);
IDiffieHellman _dh = new DiffieHellman();
DHDerivedKey _derived = _dh.GenerateDerivedKey(_aliaskeys, _publickeyto);
Console.WriteLine($"Derived Key:\n {BitConverter.ToString(_derived.Value)}");
byte[] IV = System.Text.Encoding.UTF8.GetBytes(fileName);
ICypher cypher = new AesCypher(_derived.Value, IV);
byte[] encrypted;
if (isBinary)
{
var content = ReadBinFile(fileName);
encrypted = cypher.Encrypt(Convert.ToBase64String(content));
}
else
{
encrypted = cypher.Encrypt(ReadTextFile(fileName));
}
WriteBinFile($"{fileName}{extfile}", encrypted);
Console.WriteLine($"{fileName}{extfile} encrypt file created.");
}
private static void RestoreEncryptFileFrom(string aliasName, string fileName, string pubFileName, bool isBinary)
{
DHKeyPair _aliaskeys = RestoreKeys(aliasName);
PublicKey _publickeyto = RestorePublicKey(pubFileName);
IDiffieHellman _dh = new DiffieHellman();
DHDerivedKey _derived = _dh.GenerateDerivedKey(_aliaskeys, _publickeyto);
Console.WriteLine($"Derived Key:\n {BitConverter.ToString(_derived.Value)}");
string fileout = fileName.Replace(extfile, string.Empty);
byte[] IV = System.Text.Encoding.UTF8.GetBytes(fileout);
ICypher cypher = new AesCypher(_derived.Value, IV);
byte[] read = ReadBinFile(fileName);
string content = cypher.Decrypt(read);
if (isBinary)
{
var bcontent = Convert.FromBase64String(content);
WriteBinFile(fileout, bcontent);
}
else
{
WriteTextFile(fileout, content);
}
Console.WriteLine($"{fileout} decrypt file created.");
}
