對稱加密之AES、壓縮解壓以及壓縮加密解密解壓綜合實戰(zhàn)

1. AES
2. 壓縮解壓
3. 壓縮加密解密解壓

對稱加密：

        public static byte[] encryptStringToBytes_AES(byte[] fileContentBytes, byte[] Key, byte[] IV)        {            // Check arguments.            if (fileContentBytes == null || fileContentBytes.Length <= 0)                throw new ArgumentNullException("plainText");            if (Key == null || Key.Length <= 0)                throw new ArgumentNullException("Key");            if (IV == null || IV.Length <= 0)                throw new ArgumentNullException("IV");            MemoryStream msEncrypt = null;            AesCryptoServicePRovider aesAlg = null;            try            {                aesAlg = new AesCryptoServiceProvider();                aesAlg.Padding = PaddingMode.PKCS7;                aesAlg.Key = Key;                aesAlg.IV = IV;                ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);                msEncrypt = new MemoryStream();                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))                {                    csEncrypt.Write(fileContentBytes, 0, fileContentBytes.Length);                    csEncrypt.FlushFinalBlock();                }            }            catch (Exception ex)            {            }            finally            {                if (aesAlg != null)                    aesAlg.Clear();            }            return msEncrypt.ToArray();        }

解密代碼實現(xiàn)：

        public static byte[] decryptBytes(byte[] cipherText, byte[] Key, byte[] IV)        {            if (cipherText == null || cipherText.Length <= 0)                throw new ArgumentNullException("cipherText");            if (Key == null || Key.Length <= 0)                throw new ArgumentNullException("Key");            if (IV == null || IV.Length <= 0)                throw new ArgumentNullException("IV");            AesCryptoServiceProvider aesAlg = null;            byte[] buffer = null;            try            {                using (aesAlg = new AesCryptoServiceProvider())                {                    aesAlg.Padding = PaddingMode.PKCS7;                    aesAlg.Key = Key;                    aesAlg.IV = IV;                    ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);                    using (MemoryStream msDecrypt = new MemoryStream(cipherText))                    {                        CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);                        byte[] tempbuffer = new byte[cipherText.Length];                        int totalBytesRead = csDecrypt.Read(tempbuffer, 0, tempbuffer.Length);                        buffer = tempbuffer.Take(totalBytesRead).ToArray();                    }                }            }            catch (Exception ex)            {            }            finally            {                if (aesAlg != null)                    aesAlg.Clear();            }            return buffer;        }

客戶端加密解密文本文件實戰(zhàn)：

        /// <summary>        /// 加密解密        /// </summary>        private static void _EncryptAndDecrypt()        {            ASCIIEncoding asciiEnc = new ASCIIEncoding();            byte[] initVectorBytes = asciiEnc.GetBytes("@1B2c3D4e5F6g7H8");            //Randomly generate or Book key - key K2 - Key to encrypt xml content            string keyK2 = Generator.RandomString(10);            //Generate the 128 bit string using md5 for key K2            MD5 hashProvider = MD5.Create();            byte[] md5EncryptedKeyK2 = hashProvider.ComputeHash(asciiEnc.GetBytes(keyK2));            string filename = "NewTextDocument.txt";            string filepath = Environment.CurrentDirectory + "http://" + filename;            byte[] Content = Encryption.encryptStringToBytes_AES(File.ReadAllBytes(filepath), md5EncryptedKeyK2, initVectorBytes);            string encryptfilepath = Environment.CurrentDirectory + "http://encrypt" + filename;            File.WriteAllBytes(encryptfilepath, Content);            byte[] decryptContent = Encryption.decryptBytes(File.ReadAllBytes(encryptfilepath), md5EncryptedKeyK2, initVectorBytes);            string decryptfilepath = Environment.CurrentDirectory + "http://decrypt" + filename;            File.WriteAllBytes(decryptfilepath, decryptContent);        }

壓縮解壓：

            string filename = "NewTextDocument.txt";            string filepath = Environment.CurrentDirectory + "http://" + filename;            string zipfilepath = Environment.CurrentDirectory + "http://NewTextDocument.zip";            using (ZipFile contentZip = new ZipFile())            {                //壓縮                contentZip.AlternateEncoding = Encoding.GetEncoding("iso-8859-1");                contentZip.AlternateEncodingUsage = ZipOption.Always;                ZipEntry contentFile = contentZip.AddEntry(filename, File.ReadAllBytes(filepath));                contentZip.Save(zipfilepath);                //解壓                contentZip.ExtractAll(Environment.CurrentDirectory);            }

壓縮加密解密解壓：

 string filename = "NewTextDocument.zip";            string filepath = Environment.CurrentDirectory + "http://" + filename;            string zipfilepath = Environment.CurrentDirectory + "http://" + filename;            ZipFile contentZip = new ZipFile();            contentZip.AlternateEncoding = Encoding.GetEncoding("iso-8859-1");            contentZip.AlternateEncodingUsage = ZipOption.Always;            var bytecontent = File.ReadAllBytes(Environment.CurrentDirectory + "http://NewTextDocument.txt");            ZipEntry contentFile = contentZip.AddEntry("NewTextDocument.txt", bytecontent);            contentZip.Save(zipfilepath);            ASCIIEncoding asciiEnc = new ASCIIEncoding();            byte[] initVectorBytes = asciiEnc.GetBytes("@1B2c3D4e5F6g7H8");            //Randomly generate or Book key - key K2 - Key to encrypt xml content            string keyK2 = Generator.RandomString(10);            //Generate the 128 bit string using MD5 for key K2            MD5 hashProvider = MD5.Create();            byte[] md5EncryptedKeyK2 = hashProvider.ComputeHash(asciiEnc.GetBytes(keyK2));            byte[] Content = Encryption.encryptStringToBytes_AES(File.ReadAllBytes(filepath), md5EncryptedKeyK2, initVectorBytes);            string encryptfilepath = Environment.CurrentDirectory + "http://encrypt" + filename;            File.WriteAllBytes(encryptfilepath, Content);            byte[] decryptContent = Encryption.decryptBytes(File.ReadAllBytes(encryptfilepath), md5EncryptedKeyK2, initVectorBytes);            string decryptfilepath = Environment.CurrentDirectory + "http://decrypt" + filename;            File.WriteAllBytes(decryptfilepath, decryptContent);            contentZip.ExtractAll(Environment.CurrentDirectory + "http://unzip//decrypt");            string key = Convert.ToBase64String(md5EncryptedKeyK2);            string iv = Convert.ToBase64String(initVectorBytes);            Console.WriteLine(key);            Console.WriteLine(iv);            byte[] decryptContent1 = Encryption.decryptBytes(File.ReadAllBytes(encryptfilepath), Convert.FromBase64String(key), Convert.FromBase64String(iv));            string decryptfilepath1 = Environment.CurrentDirectory + "http://decrypt1" + filename;            contentZip.ExtractAll(Environment.CurrentDirectory + "http://unzip//decrypt1");            File.WriteAllBytes(decryptfilepath1, decryptContent1);

參考文章：NET對稱加密體系

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