86 lines
3.8 KiB
C#
86 lines
3.8 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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namespace langguanApi.Common
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{
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/// <summary>
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/// 字符串处理类
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/// </summary>
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public static class StringHelper
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{
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/// <summary>
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/// MD5加密算法
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/// </summary>
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/// <param name="password"></param>
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/// <returns></returns>
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public static string MD5Encrypt32(string password)
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{
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string cl = password;
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string pwd = "";
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MD5 md5 = MD5.Create(); //实例化一个md5对像
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// 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择
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byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
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// 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得
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for (int i = 0; i < s.Length; i++)
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{
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// 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符
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pwd = pwd + s[i].ToString("X");
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}
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return pwd;
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}
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/// <summary>
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/// 加密
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/// </summary>
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/// <param name="strSource">需要加密的字符串</param>
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/// <returns>加密后的字符串</returns>
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//[OperationContract]
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public static string Encrypt(string strSource)
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{
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//把字符串放到byte数组中
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byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
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//建立加密对象的密钥和偏移量
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byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
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byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
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//实例DES加密类
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DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
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mobjCryptoService.Key = iv;
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mobjCryptoService.IV = key;
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ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
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//实例MemoryStream流加密密文件
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
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cs.Write(bytIn, 0, bytIn.Length);
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cs.FlushFinalBlock();
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string strOut = System.Convert.ToBase64String(ms.ToArray());
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return strOut;
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}
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/// <summary>
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/// 解密
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/// </summary>
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/// <param name="Source">需要解密的字符串</param>
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/// <returns>解密后的字符串</returns>
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//[OperationContract]
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public static string Decrypt(string Source)
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{
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if (Source == null) return string.Empty;
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//将解密字符串转换成字节数组
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byte[] bytIn = System.Convert.FromBase64String(Source);
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//给出解密的密钥和偏移量，密钥和偏移量必须与加密时的密钥和偏移量相同
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byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
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byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
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DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
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mobjCryptoService.Key = iv;
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mobjCryptoService.IV = key;
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//实例流进行解密
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System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);
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ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
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CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
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StreamReader strd = new StreamReader(cs, Encoding.Default);
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return strd.ReadToEnd();
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}
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}
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}
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