Ejemplo n.º 1
0
        ///<summary>
        /// Decrypt a file using Rijndael algorithm.
        ///</summary>
        /// <param name="file">Encrypted source file</param>
        /// <param name="password">Password</param>
        /// <returns>Decoded content string</returns>
        public static string Decrypt(string file, string password)
        {
            string content = string.Empty;

            try
            {
                UnicodeEncoding uniEnc = new UnicodeEncoding();
                KeyGen          key    = new KeyGen(password);

                FileStream fsCrypt = new FileStream(file, FileMode.Open);

                RijndaelManaged RMCrypto = new RijndaelManaged();

                CryptoStream cs = new CryptoStream(fsCrypt,
                                                   RMCrypto.CreateDecryptor(key.Key, key.IV),
                                                   CryptoStreamMode.Read);

                int         data;
                List <byte> contentBytes = new List <byte>();
                while ((data = cs.ReadByte()) != -1)
                {
                    contentBytes.Add((byte)data);
                }
                content += uniEnc.GetString(contentBytes.ToArray());

                cs.Close();
                fsCrypt.Close();
            }
            catch
            {
                content = string.Empty;
            }
            return(content);
        }
Ejemplo n.º 2
0
        ///<summary>
        /// Encrypt a file using Rijndael algorithm.
        ///</summary>
        /// <param name="content">Text to encrypt</param>
        /// <param name="password">Password</param>
        /// <param name="file">Target file name</param>
        /// <returns>True on success, false on failure</returns>
        public static bool Encrypt(string content, string password, string file)
        {
            bool success = true;

            try
            {
                UnicodeEncoding uniEnc = new UnicodeEncoding();
                KeyGen          key    = new KeyGen(password);

                string     cryptFile = file;
                FileStream fsCrypt   = new FileStream(cryptFile, FileMode.Create);

                RijndaelManaged RMCrypto = new RijndaelManaged();

                CryptoStream cs = new CryptoStream(fsCrypt,
                                                   RMCrypto.CreateEncryptor(key.Key, key.IV),
                                                   CryptoStreamMode.Write);

                byte[] contentBytes = uniEnc.GetBytes(content);

                foreach (byte b in contentBytes)
                {
                    cs.WriteByte(b);
                }

                cs.Close();
                fsCrypt.Close();
            }
            catch
            {
                success = false;
            }
            return(success);
        }