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60 lines
1.7 KiB
60 lines
1.7 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Security.Cryptography;
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using System.IO;
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namespace Utils.Security
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{
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/// <summary>
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/// DES加密。方法二
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/// </summary>
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public class DES2
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{
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/// <summary>
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/// 加密字符串
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/// </summary>
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public string EncryptString(string pToEncrypt, string sKey)//加密字符串
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{
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var des = new DESCryptoServiceProvider();
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var inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
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des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
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des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
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var ms = new MemoryStream();
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var cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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var ret = new StringBuilder();
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foreach (byte b in ms.ToArray()) {
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ret.AppendFormat("{0:X2}", b);
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}
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return ret.ToString();
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}
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/// <summary>
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/// 解密字符串
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/// </summary>
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public string DecryptString(string pToDecrypt, string sKey)//解密字符串
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{
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var des = new DESCryptoServiceProvider();
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var inputByteArray = new byte[pToDecrypt.Length / 2];
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for (int x = 0; x < pToDecrypt.Length / 2; x++) {
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int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
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inputByteArray[x] = (byte)i;
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}
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des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
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des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
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var ms = new MemoryStream();
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var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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return System.Text.Encoding.Default.GetString(ms.ToArray());
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}
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}
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}
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