- #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, 0, 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, 0, 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, 0, 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, RiKey), CryptoStreamMode.Read);
- try
- {
- cs.Read(InitialText, 0, 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, ct, CryptoStreamMode.Write);
- cs.Write(byt, 0, 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, mCSP.IV);
- byt = Encoding.UTF8.GetBytes(str);
- ms = new MemoryStream();
- cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
- cs.Write(byt, 0, 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, ct, CryptoStreamMode.Write);
- cs.Write(byt, 0, 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 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.CreateDecryptor(mCSP.Key, mCSP.IV);
- byt = Convert.FromBase64String(str);
- ms = new MemoryStream();
- cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
- cs.Write(byt, 0, 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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