Asp.Net 加密解密

概述Asp.Net 加密解密

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#region DES加密解密        /// <summary>        /// DES加密        /// </summary>        /// <param name="strSource">待加密字串</param>        /// <param name="key">32位Key值</param>        /// <returns>加密后的字符串</returns>        public string DESEncrypt(string strSource)        {            return DESEncrypt(strSource,DESKey);        }        public string DESEncrypt(string strSource,byte[] key)        {            SymmetricAlgorithm sa = Rijndael.Create();            sa.Key = key;            sa.Mode = CipherMode.ECB;            sa.padding = paddingMode.Zeros;            MemoryStream ms = new MemoryStream();            CryptoStream cs = new CryptoStream(ms,sa.CreateEncryptor(),CryptoStreamMode.Write);            byte[] byt = EnCoding.Unicode.GetBytes(strSource);            cs.Write(byt,byt.Length);            cs.FlushFinalBlock();            cs.Close();            return Convert.ToBase64String(ms.ToArray());        }        /// <summary>        /// DES解密        /// </summary>        /// <param name="strSource">待解密的字串</param>        /// <param name="key">32位Key值</param>        /// <returns>解密后的字符串</returns>        public string DESDecrypt(string strSource)        {            return DESDecrypt(strSource,DESKey);        }        public string DESDecrypt(string strSource,byte[] key)        {            SymmetricAlgorithm sa = Rijndael.Create();            sa.Key = key;            sa.Mode = CipherMode.ECB;            sa.padding = paddingMode.Zeros;            ICryptotransform ct = sa.CreateDecryptor();            byte[] byt = Convert.FromBase64String(strSource);            MemoryStream ms = new MemoryStream(byt);            CryptoStream cs = new CryptoStream(ms,ct,CryptoStreamMode.Read);            StreamReader sr = new StreamReader(cs,EnCoding.Unicode);            return sr.ReadToEnd();        }        #endregion        #region 一个用hash实现的加密解密方法        /// <summary>        /// 加密        /// </summary>        /// <param name="src"></param>        /// <returns></returns>        public static string EncryptStrByHash(string src)        {            if (src.Length == 0)            {                return "";            }            byte[] HaKey = System.Text.EnCoding.ASCII.GetBytes((src + "Test").tochararray());            byte[] HaData = new byte[20];            HMACSHA1 Hmac = new HMACSHA1(HaKey);            CryptoStream cs = new CryptoStream(Stream.Null,Hmac,CryptoStreamMode.Write);            try            {                cs.Write(HaData,HaData.Length);            }            finally            {                cs.Close();            }            string HaResult = System.Convert.ToBase64String(Hmac.Hash).Substring(0,16);            byte[] RiKey = System.Text.EnCoding.ASCII.GetBytes(HaResult.tochararray());            byte[] RIDataBuf = System.Text.EnCoding.ASCII.GetBytes(src.tochararray());            byte[] EncodedBytes =   { };            MemoryStream ms = new MemoryStream();            RijndaelManaged rv = new RijndaelManaged();            cs = new CryptoStream(ms,rv.CreateEncryptor(RiKey,RiKey),CryptoStreamMode.Write);            try            {                cs.Write(RIDataBuf,RIDataBuf.Length);                cs.FlushFinalBlock();                EncodedBytes = ms.ToArray();            }            finally            {                ms.Close();                cs.Close();            }            return HaResult + System.Convert.ToBase64String(EncodedBytes);        }        /// <summary>        /// 解密        /// </summary>        /// <param name="src"></param>        /// <returns></returns>        public static string DecrypStrByHash(string src)        {            if (src.Length < 40) return "";            byte[] SrcBytes = System.Convert.FromBase64String(src.Substring(16));            byte[] RiKey = System.Text.EnCoding.ASCII.GetBytes(src.Substring(0,16).tochararray());            byte[] InitialText = new byte[SrcBytes.Length];            RijndaelManaged rv = new RijndaelManaged();            MemoryStream ms = new MemoryStream(SrcBytes);            CryptoStream cs = new CryptoStream(ms,rv.CreateDecryptor(RiKey,CryptoStreamMode.Read);            try            {                cs.Read(InitialText,InitialText.Length);            }            finally            {                ms.Close();                cs.Close();            }            System.Text.StringBuilder Result = new System.Text.StringBuilder();            for (int i = 0; i < InitialText.Length; ++i) if (InitialText[i] > 0) Result.Append((char)InitialText[i]);            return Result.ToString();        }        /// <summary>        /// 对加密后的密文重新编码,如果密文长>16,则去掉前16个字符,如果长度小于16,返回空字符串        /// </summary>        /// <param name="s"></param>        /// <returns></returns>        public string ReEncryptStrByHash(string s)        {            string e = Encrypt.EncryptStrByHash(s);            return ((e.Length > 16) ? e.Substring(16) : "");        }        #endregion        #region Md5加密,生成16位或32位,生成的密文都是大写        public static string Md5To16(string str)        {            MD5CryptoServiceProvIDer md5 = new MD5CryptoServiceProvIDer();            string t2 = BitConverter.ToString(md5.ComputeHash(UTF8EnCoding.Default.GetBytes(str)),4,8);            t2 = t2.Replace("-","");            return t2;        }        //// <summary>        /// MD5　32位加密        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static string Md5To32(string str)        {            string pwd = "";            MD5 md5 = MD5.Create();            byte[] s = md5.ComputeHash(EnCoding.UTF8.GetBytes(str));            for (int i = 0; i < s.Length; i++)            {                pwd = pwd + s[i].ToString("X");            }            return pwd;        }        #endregion        #region 3DES加密解密        public string Encrypt3DES(string str)        {            //密钥            string sKey = "wyw308";            //    //矢量,可为空            string sIV = "scf521";            //    //构造对称算法            SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvIDer();            ICryptotransform ct;            MemoryStream ms;            CryptoStream cs;            byte[] byt;            mCSP.Key = Convert.FromBase64String(sKey);            mCSP.IV = Convert.FromBase64String(sIV);            mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;            mCSP.padding = System.Security.Cryptography.paddingMode.PKCS7;            ct = mCSP.CreateEncryptor(mCSP.Key,mCSP.IV);            byt = EnCoding.UTF8.GetBytes(str);            ms = new MemoryStream();            cs = new CryptoStream(ms,CryptoStreamMode.Write);            cs.Write(byt,byt.Length);            cs.FlushFinalBlock();            cs.Close();            return Convert.ToBase64String(ms.ToArray());        }        /// <summary>        /// 带指定密钥和矢量的3DES加密        /// </summary>        /// <param name="str"></param>        /// <param name="sKey"></param>        /// <param name="sIV"></param>        /// <returns></returns>        public string Encrypt3DES(string str,string sKey,string sIV)        {            SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvIDer();            ICryptotransform ct;            MemoryStream ms;            CryptoStream cs;            byte[] byt;            mCSP.Key = Convert.FromBase64String(sKey);            mCSP.IV = Convert.FromBase64String(sIV);            mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;            mCSP.padding = System.Security.Cryptography.paddingMode.PKCS7;            ct = mCSP.CreateEncryptor(mCSP.Key,byt.Length);            cs.FlushFinalBlock();            cs.Close();            return Convert.ToBase64String(ms.ToArray());        }        //解密        public string Decrypt3DES(string Value)        {            string sKey = "wyw308";            string sIV = "scf521";            SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvIDer();            ICryptotransform ct;            MemoryStream ms;            CryptoStream cs;            byte[] byt;            mCSP.Key = Convert.FromBase64String(sKey);            mCSP.IV = Convert.FromBase64String(sIV);            mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;            mCSP.padding = System.Security.Cryptography.paddingMode.PKCS7;            ct = mCSP.CreateDecryptor(mCSP.Key,mCSP.IV);            byt = Convert.FromBase64String(Value);            ms = new MemoryStream();            cs = new CryptoStream(ms,byt.Length);            cs.FlushFinalBlock();            cs.Close();            return EnCoding.UTF8.GetString(ms.ToArray());        }        /// <summary>        /// 带指定密钥和矢量的3DES解密        /// </summary>        /// <param name="Value"></param>        /// <param name="sKey"></param>        /// <param name="sIV"></param>        /// <returns></returns>        public string Decrypt3DES(string str,string sIV)        {            SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvIDer();            ICryptotransform ct;            MemoryStream ms;            CryptoStream cs;            byte[] byt;            mCSP.Key = Convert.FromBase64String(sKey);            mCSP.IV = Convert.FromBase64String(sIV);            mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;            mCSP.padding = System.Security.Cryptography.paddingMode.PKCS7;            ct = mCSP.CreateDecryptor(mCSP.Key,mCSP.IV);            byt = Convert.FromBase64String(str);            ms = new MemoryStream();            cs = new CryptoStream(ms,byt.Length);            cs.FlushFinalBlock();            cs.Close();            return EnCoding.UTF8.GetString(ms.ToArray());        }        #endregion        #region 一个简单的加密解密方法,只支持英文        public static string EnCryptEnStr(string str) //倒序加1加密        {            byte[] by = new byte[str.Length];            for (int i = 0;             i <= str.Length - 1;             i++)            {                by[i] = (byte)((byte)str[i] + 1);            }            str = "";            for (int i = by.Length - 1;             i >= 0;             i--)            {                str += ((char)by[i]).ToString();            }            return str;        }        public static string DeCryptEnStr(string str) //顺序减1解码        {            byte[] by = new byte[str.Length];            for (int i = 0;             i <= str.Length - 1;             i++)            {                by[i] = (byte)((byte)str[i] - 1);            }            str = "";            for (int i = by.Length - 1;             i >= 0;             i--)            {                str += ((char)by[i]).ToString();            }            return str;        }        #endregion        #region 一个简单的加密解密方法,在上一个的基础上支持中文        public static string EnCryptCnStr(string str)        {            string htext = ""; // blank text            for (int i = 0; i < str.Length; i++)            {                htext = htext + (char)(str[i] + 10 - 1 * 2);            }            return htext;        }        public static string DeCryptCnStr(string str)        {            string dtext = "";            for (int i = 0; i < str.Length; i++)            {                dtext = dtext + (char)(str[i] - 10 + 1 * 2);            }            return dtext;        }        #endregion        #region URL地址编码解码        /// <summary>        /// 编码URL地址        /// </summary>        /// <param name="url"></param>        /// <returns></returns>        public static string UrlEncode(string url)        {            byte[] mByte = null;            mByte = System.Text.EnCoding.GetEnCoding("GB2312").GetBytes(url);            return System.Web.httpUtility.UrlEncode(mByte);        }        /// <summary>        /// 解码URL地址        /// </summary>        /// <param name="url"></param>        /// <returns></returns>        public static string UrlDecode(string url)        {            return httpUtility.UrlDecode(url,System.Text.EnCoding.GetEnCoding("GB2312"));        }        #endregion 

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