AppEncrypts helper.提供加密解密的一個通用類

 

在.NET中,我們可以直接使用System.Security.Cryptography空間中的通過加密/解密類進行操作.
這幾天在玩數據加密的時候用到了.
感覺用起來不是很方便.
於是寫了一個通用(hoho,算是比較通用的吧)的加密/解密的類.
現在只完成了對稱加密類的封裝.
代碼:

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;

namespace CnBlogs.Helper.hBifTs
{

    AppEncrypt#region AppEncrypt
    /**//// <summary>
    /// AppEncrypt : 抽象類,用於提供加密/解密類的基本功能.
    /// </summary>
    public abstract class AppEncrypt : IDisposable{
        Private variable & propery#region Private variable & propery
        protected byte[] key;
        protected byte[] iv;

        protected ICryptoTransform CryptoTrans;
        protected SymmetricAlgorithm CryptObj;

        public byte[] Key{
            get{ return key;}
            set{ key = value;}
        }

        public byte[] IV
        {
            get{ return iv;}
            set{ iv = value;}
        }

        public AppEncrypt(byte[] Key,byte[] IV){
            key = Key;
            iv = IV;
        }
        #endregion

        Dispose#region Dispose

        public virtual void Dispose()
        {
            if( CryptoTrans != null)
            {
                CryptoTrans.Dispose();
                CryptoTrans = null;
            }
            if( CryptObj != null)
            {
                CryptObj.Clear();
                CryptObj = null;
            }
        }
        #endregion

        Common Function#region Common Function
        /**//// <summary>
        /// 將Source中的數據進行加密/解密,結果輸出到destination中.
        /// </summary>
        /// <param name="source"></param>
        /// <param name="destination"></param>
        protected virtual void Translate(Stream source,ref Stream destination)
        {
            CryptoStream cstr = new CryptoStream(destination, CryptoTrans,CryptoStreamMode.Write);
            long read = 0;
            long length = source.Length;
            int len;
            byte[] bin = new byte[100];
            while( read < length)
            {
                len = source.Read(bin,0,bin.Length);
                cstr.Write(bin,0,len);
                read += len;
                cstr.Flush();
            }
            cstr.Close();
        }

        /**//// <summary>
        /// 加密
        /// </summary>
        public virtual MemoryStream Encrypt(Stream source){
            CryptoTrans = CryptObj.CreateEncryptor(key,iv);
            Stream mem = new MemoryStream();
            Translate(source,ref mem);
            return (MemoryStream)mem;
        }

        /**//// <summary>
        /// 加密
        /// </summary>
        /// <param name="source"></param>
        /// <param name="destination"></param>
        public virtual void Encrypt(Stream source,ref Stream destination){
            CryptoTrans = CryptObj.CreateEncryptor(key,iv);
            Translate(source,ref destination);
        }

        /**//// <summary>
        /// 解密
        /// </summary>
        public virtual Stream Dencrypt(Stream source){
            CryptoTrans = CryptObj.CreateDecryptor(key,iv);
            Stream mem = new MemoryStream();
            Translate(source ,ref mem);
            return (MemoryStream)mem;
        }

        /**//// <summary>
        /// 解密
        /// </summary>
        /// <param name="source"></param>
        /// <param name="destination"></param>
        public virtual void Dencrypt(Stream source,ref Stream destination){
            CryptoTrans = CryptObj.CreateDecryptor(key,iv);
            Translate(source,ref destination);
        }

        /**//// <summary>
        /// 創建隨機密鑰
        /// </summary>
        /// <param name="Key"></param>
        /// <param name="IV"></param>
        public virtual void CreateRandomKey(out byte[] Key,out byte[] IV){
            CryptObj.GenerateKey();
            Key = CryptObj.Key;
            CryptObj.GenerateIV();
            IV = CryptObj.IV;
        }
        #endregion
    }
    #endregion

    DESEncrypt#region DESEncrypt
    /**//// <summary>
    /// DESEncrypt : 提供DES加密方式
    /// </summary>
    public class DESEncrypt : AppEncrypt
    {

        public DESEncrypt() : this( 
            new byte[]{0x23, 0x50, 0xA3, 0x51, 0xA, 0x32, 0x10, 0xE8},
            new byte[]{0x67, 0xDD, 0xF9, 0x7D, 0x19, 0x63, 0x8B, 0xBE}
            ){}

        public DESEncrypt(byte[] Key,byte[] IV):base(Key,IV){            
            CryptObj = new DESCryptoServiceProvider();
        }
    }

    #endregion

    TripleDESEncrypt#region TripleDESEncrypt
    /**//// <summary>
    /// TripleDESEncrypt : 提供三重DES加密方式
    /// </summary>
    public class TripleDESEncrypt : AppEncrypt
    {

        public TripleDESEncrypt() : this( 
            new byte[]{0x27,0xAA,0xA0,0xAB,0x43,0xEC,0x6E,0xEB,0xED,0xC6,0x37,0xD,0x81,0x48,0x2E,0x5F,0x2E,0xAB,0x81,0xAC,0xA8,0x85,0x2C,0x6,},
            new byte[]{0xCA,0x9E,0xD4,0xBF,0xCB,0x4A,0x6,0x3D,}
            ){}

        public TripleDESEncrypt(byte[] Key,byte[] IV) : base(Key,IV){
            CryptObj = new TripleDESCryptoServiceProvider();
        }
    }
    #endregion

    RC2Encrypt#region RC2Encrypt
    /**//// <summary>
    /// RC2Encrypt : 提供RC2加密方式
    /// </summary>
    public class RC2Encrypt : AppEncrypt
    {

        public RC2Encrypt():this(
            new byte[]{0x43,0x89,0x35,0x68,0xE4,0xE9,0x84,0x39,0x1B,0xB2,0x18,0x40,0x4A,0x91,0x5F,0x52,},
            new byte[]{0xF9,0x29,0xEC,0x12,0x7A,0xE4,0xFC,0x87,}
            ){}

        public RC2Encrypt(byte[] Key,byte[] IV) : base( Key,IV){
            CryptObj = new RC2CryptoServiceProvider();
        }
    }
    #endregion

    RijndaelEncrypt#region RijndaelEncrypt
    /**//// <summary>
    /// RijndaelEncrypt : 提供Rijndael加密方式
    /// </summary>
    public class RijndaelEncrypt : AppEncrypt
    {

        public RijndaelEncrypt():this(
            new byte[]{0xB2,0xBC,0xEB,0xF5,0xA1,0xD9,0x7F,0x8A,0x37,0x95,0xE9,0xE7,0x42,0x81,0x9F,0xB,0x4C,
                          0xA,0x31,0x39,0xC9,0x25,0xFF,0xEA,0xFA,0x75,0x2,0xCB,0x16,0xCC,0xE5,0x13,},
            new byte[]{0xD1,0x93,0x9F,0x7A,0xD1,0xA9,0xCA,0x2D,0x5D,0xD9,0x8C,0xF0,0xBC,0xBA,0x40,0x10,}
            ){}

        public RijndaelEncrypt(byte[] Key,byte[] IV):base(Key,IV){
            CryptObj = new RijndaelManaged();
        }
    }
    #endregion
}

使用只要直接調用基類的Encrypt和Dencrypt函數即可..
測試用例如下:

using System;
using System.IO;
using System.Text;
using CnBlogs.Helper.hBifTs;
using NUnit.Framework;


namespace CnBlogs.Helper.hBifTs.TestCases
{
    /**//// <summary>
    /// Summary description for TestAppEncrypt.
    /// </summary>
    /// 
    [TestFixture]
    public class TestAppEncrypt
    {
        private AppEncrypt enc;
        private MemoryStream mem;

        public TestAppEncrypt()
        {
        }

        [SetUp] public void Setup(){
            byte[] msg = Encoding.Unicode.GetBytes("hello,I got the new world,豬啊..");
            mem = new MemoryStream( msg);
        }

        [TearDown] public void TearDown(){
            mem.Close();
        }

        public void Common(){
            Stream dest = new MemoryStream();
            enc.Encrypt( mem,ref dest);
            Stream dest1 = new MemoryStream( ((MemoryStream)dest).ToArray());
            Stream dest2 = new MemoryStream();
            enc.Dencrypt( dest1,ref dest2);
            Assert.AreEqual( Encoding.Unicode.GetString(mem.ToArray()),Encoding.Unicode.GetString(((MemoryStream)dest2).ToArray()));
        }

        [Test] public void TestDES(){
            enc = new DESEncrypt();
            Common();
        }

        [Test] public void TestTripleDES(){
            enc = new TripleDESEncrypt();
            Common();
        }

        [Test] public void TestRC2(){
            enc = new RC2Encrypt();
            Common();
        }

        [Test] public void TestRijndael(){
            enc = new RijndaelEncrypt();
            Common();
        }
    }
}

應靈感之源的要求,提供代碼下載: AppEncrypts.zip

 

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