public static long AES_Decrypt(string inName, string privKey)
{
var key = Crypto.RSA.ParsePEM <AsymmetricCipherKeyPair>(privKey);
var outName = inName + "_dec";
var fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
var fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
Console.WriteLine("Decrypting to " + outName);
Console.WriteLine("Any such file will be overwritten!");
// read Header
var buff = new byte[Header.Header.HEADER_SIZE];
if (Header.Header.HEADER_SIZE != fin.Read(buff, 0, Header.Header.HEADER_SIZE))
{
throw new HeaderException("Missing Header data. Required lenght of header is " + Header.Header.HEADER_SIZE + " bytes.");
}
var header = new Header.Header(buff);
var aesParams = header.ToAESParameters(key.Private);
var total = AES.ProcessInput(false, fin, fout, aesParams);
return(total + Header.Header.HEADER_SIZE);
}
public static long AES_Encrypt(string inName, string pubKey)
{
var key = Crypto.RSA.ParsePEM <AsymmetricKeyParameter>(pubKey);
var outName = inName + "_enc";
var fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
var fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
Console.WriteLine("Encrypting to " + outName);
Console.WriteLine("Any such file will be overwritten!");
// Set Parameters
var aesParams = new AESParameters()
{
AlgorithmId = Algorithm.Rijndael256,
CipherMode = CipherMode.CBC,
PaddingMode = PaddingMode.PKCS7,
BlockSize = AESParameters.DEFAULT_BLOCKSIZE_BITCOUNT,
IVLength = AESParameters.DEFAULT_BLOCKSIZE_BITCOUNT,
KeyLength = AESParameters.DEFAULT_KEY_BITCOUNT,
IV = RndBytes(AESParameters.DEFAULT_BLOCKSIZE_BITCOUNT / 8),
Key = RndBytes(AESParameters.DEFAULT_KEY_BITCOUNT / 8),
};
// Write Header
var header = new Header.Header(aesParams, key);
fout.Write(header.ToArray(), 0, Header.Header.HEADER_SIZE);
// Encrypt the rest
var total = AES.ProcessInput(true, fin, fout, aesParams);
return(total + Header.Header.HEADER_SIZE);
}
