예제 #1
0
        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);
        }
예제 #2
0
        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);
        }